first commit

.vscode/settings.json

@@ -13,7 +13,17 @@
         "stdint.h": "c",
         "cmath": "c",
         "time.h": "c",
-        "*.cl": "c",
-        "sdl_ttf.h": "c"
+        "*.cl": "opencl",
+        "sdl_ttf.h": "c",
+        "types.h": "c",
+        "__hash_table": "c",
+        "__locale": "c",
+        "ios": "c",
+        "algorithm": "c",
+        "__node_handle": "c",
+        "chrono": "c",
+        "random": "c",
+        "limits": "c",
+        "queue": "c"
     }
 }

Makefile

@@ -1,13 +1,13 @@
 COMPILER=gcc
 FLAGS_ALL=-g -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter
-FLAGS_EXAMPLE=-Lbuilds/final\ binaries -lrasteriver -Wl,-rpath=builds/final\ binaries/ -lm -lSDL2
-FLAGS_LIB=-D CL_TARGET_OPENCL_VERSION=120 -fPIC -shared -lc -lSDL2 -lSDL2_ttf -lm -lOpenCL
+FLAGS_EXAMPLE=-Lbuilds/ -lrasteriver -Wl,-rpath=builds/ -lm -lSDL2
+FLAGS_LIB=-fPIC -shared -lc -lSDL2 -lm -lOpenCL
 
 main.bin: rasteriver.so
-	$(COMPILER) $(FLAGS_ALL) src/launch\ program/main.c -o builds/final\ binaries/main.bin $(FLAGS_EXAMPLE) 
+	$(COMPILER) $(FLAGS_ALL) src/launch\ program/main.c -o builds/main.bin $(FLAGS_EXAMPLE) 
 
 rasteriver.so:
-	$(COMPILER) $(FLAGS_ALL) src/RasterIver/source\ code/rasteriver.c -o builds/final\ binaries/librasteriver.so $(FLAGS_LIB) 
+	$(COMPILER) $(FLAGS_ALL) src/main/main.c -o builds/librasteriver.so $(FLAGS_LIB) 
 
 clean:
-	rm builds/final\ binaries/*
+	rm builds/*

dbg

@@ -1 +1 @@
-gdb -ex run builds/final\ binaries/main.bin
+gdb -ex run builds/main.bin

errcodes.txt

@@ -0,0 +1,59 @@
+CL_SUCCESS                                  0
+CL_DEVICE_NOT_FOUND                         -1
+CL_DEVICE_NOT_AVAILABLE                     -2
+CL_COMPILER_NOT_AVAILABLE                   -3
+CL_MEM_OBJECT_ALLOCATION_FAILURE            -4
+CL_OUT_OF_RESOURCES                         -5
+CL_OUT_OF_HOST_MEMORY                       -6
+CL_PROFILING_INFO_NOT_AVAILABLE             -7
+CL_MEM_COPY_OVERLAP                         -8
+CL_IMAGE_FORMAT_MISMATCH                    -9
+CL_IMAGE_FORMAT_NOT_SUPPORTED               -10
+CL_BUILD_PROGRAM_FAILURE                    -11
+CL_MAP_FAILURE                              -12
+CL_MISALIGNED_SUB_BUFFER_OFFSET             -13
+CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST -14
+CL_COMPILE_PROGRAM_FAILURE                  -15
+CL_LINKER_NOT_AVAILABLE                     -16
+CL_LINK_PROGRAM_FAILURE                     -17
+CL_DEVICE_PARTITION_FAILED                  -18
+CL_KERNEL_ARG_INFO_NOT_AVAILABLE            -19
+CL_INVALID_VALUE                            -30
+CL_INVALID_DEVICE_TYPE                      -31
+CL_INVALID_PLATFORM                         -32
+CL_INVALID_DEVICE                           -33
+CL_INVALID_CONTEXT                          -34
+CL_INVALID_QUEUE_PROPERTIES                 -35
+CL_INVALID_COMMAND_QUEUE                    -36
+CL_INVALID_HOST_PTR                         -37
+CL_INVALID_MEM_OBJECT                       -38
+CL_INVALID_IMAGE_FORMAT_DESCRIPTOR          -39
+CL_INVALID_IMAGE_SIZE                       -40
+CL_INVALID_SAMPLER                          -41
+CL_INVALID_BINARY                           -42
+CL_INVALID_BUILD_OPTIONS                    -43
+CL_INVALID_PROGRAM                          -44
+CL_INVALID_PROGRAM_EXECUTABLE               -45
+CL_INVALID_KERNEL_NAME                      -46
+CL_INVALID_KERNEL_DEFINITION                -47
+CL_INVALID_KERNEL                           -48
+CL_INVALID_ARG_INDEX                        -49
+CL_INVALID_ARG_VALUE                        -50
+CL_INVALID_ARG_SIZE                         -51
+CL_INVALID_KERNEL_ARGS                      -52
+CL_INVALID_WORK_DIMENSION                   -53
+CL_INVALID_WORK_GROUP_SIZE                  -54
+CL_INVALID_WORK_ITEM_SIZE                   -55
+CL_INVALID_GLOBAL_OFFSET                    -56
+CL_INVALID_EVENT_WAIT_LIST                  -57
+CL_INVALID_EVENT                            -58
+CL_INVALID_OPERATION                        -59
+CL_INVALID_GL_OBJECT                        -60
+CL_INVALID_BUFFER_SIZE                      -61
+CL_INVALID_MIP_LEVEL                        -62
+CL_INVALID_GLOBAL_WORK_SIZE                 -63
+CL_INVALID_PROPERTY                         -64
+CL_INVALID_IMAGE_DESCRIPTOR                 -65
+CL_INVALID_COMPILER_OPTIONS                 -66
+CL_INVALID_LINKER_OPTIONS                   -67
+CL_INVALID_DEVICE_PARTITION_COUNT           -68

main.c

@@ -0,0 +1,193 @@
+#include <CL/cl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define CHECK_ERROR(err, msg) \
+    if (err != CL_SUCCESS) { \
+        fprintf(stderr, "❌ %s failed (%d)\n", msg, err); \
+        exit(EXIT_FAILURE); \
+    }
+
+void print_platform_info(cl_platform_id platform) {
+    char buffer[1024];
+    printf("\n🌍 Platform Info:\n");
+
+    clGetPlatformInfo(platform, CL_PLATFORM_NAME, sizeof(buffer), buffer, NULL);
+    printf("🏷️ Name: %s\n", buffer);
+
+    clGetPlatformInfo(platform, CL_PLATFORM_VENDOR, sizeof(buffer), buffer, NULL);
+    printf("🏢 Vendor: %s\n", buffer);
+
+    clGetPlatformInfo(platform, CL_PLATFORM_VERSION, sizeof(buffer), buffer, NULL);
+    printf("💿 Version: %s\n", buffer);
+
+    clGetPlatformInfo(platform, CL_PLATFORM_PROFILE, sizeof(buffer), buffer, NULL);
+    printf("🧩 Profile: %s\n", buffer);
+
+    printf("\n");
+}
+
+void print_device_info(cl_device_id device) {
+    char name[256], vendor[256], version[256];
+    cl_uint compute_units;
+    cl_ulong global_mem;
+    cl_ulong local_mem;
+    size_t max_wg;
+
+    clGetDeviceInfo(device, CL_DEVICE_NAME, sizeof(name), name, NULL);
+    clGetDeviceInfo(device, CL_DEVICE_VENDOR, sizeof(vendor), vendor, NULL);
+    clGetDeviceInfo(device, CL_DEVICE_VERSION, sizeof(version), version, NULL);
+    clGetDeviceInfo(device, CL_DEVICE_MAX_COMPUTE_UNITS, sizeof(compute_units), &compute_units, NULL);
+    clGetDeviceInfo(device, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof(global_mem), &global_mem, NULL);
+    clGetDeviceInfo(device, CL_DEVICE_LOCAL_MEM_SIZE, sizeof(local_mem), &local_mem, NULL);
+    clGetDeviceInfo(device, CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof(max_wg), &max_wg, NULL);
+
+    printf("🔹 Device: %s\n", name);
+    printf("   Vendor: %s\n", vendor);
+    printf("   Version: %s\n", version);
+    printf("   Compute Units: %u\n", compute_units);
+    printf("   Global Memory: %.2f MB\n", global_mem / (1024.0 * 1024.0));
+    printf("   Local Memory: %.2f KB\n", local_mem / 1024.0);
+    printf("   Max Work Group Size: %zu\n\n", max_wg);
+}
+
+int main(void) {
+    cl_int err;
+
+    printf("🚀 Starting OpenCL diagnostic + compute test\n");
+
+    // 1. Get all platforms
+    cl_uint num_platforms = 0;
+    err = clGetPlatformIDs(0, NULL, &num_platforms);
+    CHECK_ERROR(err, "clGetPlatformIDs(count)");
+
+    cl_platform_id *platforms = malloc(sizeof(cl_platform_id) * num_platforms);
+    err = clGetPlatformIDs(num_platforms, platforms, NULL);
+    CHECK_ERROR(err, "clGetPlatformIDs(list)");
+
+    printf("🌍 Found %u OpenCL platform(s)\n", num_platforms);
+
+    // 2. List platforms and pick POCL if available
+    cl_platform_id chosen_platform = NULL;
+    char pname[256];
+    for (cl_uint i = 0; i < num_platforms; i++) {
+        print_platform_info(platforms[i]);
+        clGetPlatformInfo(platforms[i], CL_PLATFORM_NAME, sizeof(pname), pname, NULL);
+
+        if (strstr(pname, "Portable") || strstr(pname, "pocl") || strstr(pname, "POCL")) {
+            chosen_platform = platforms[i];
+        }
+    }
+
+    if (!chosen_platform) {
+        printf("⚠️  No POCL platform found, using first available.\n");
+        chosen_platform = platforms[0];
+    }
+
+    clGetPlatformInfo(chosen_platform, CL_PLATFORM_NAME, sizeof(pname), pname, NULL);
+    printf("✅ Selected platform: %s\n", pname);
+
+    // 3. Get devices
+    cl_uint num_devices = 0;
+    err = clGetDeviceIDs(chosen_platform, CL_DEVICE_TYPE_ALL, 0, NULL, &num_devices);
+    CHECK_ERROR(err, "clGetDeviceIDs(count)");
+
+    cl_device_id *devices = malloc(sizeof(cl_device_id) * num_devices);
+    err = clGetDeviceIDs(chosen_platform, CL_DEVICE_TYPE_ALL, num_devices, devices, NULL);
+    CHECK_ERROR(err, "clGetDeviceIDs(list)");
+
+    printf("🧩 Found %u device(s)\n\n", num_devices);
+
+    for (cl_uint i = 0; i < num_devices; i++) {
+        print_device_info(devices[i]);
+    }
+
+    cl_device_id device = devices[0];
+
+    // 4. Create context and queue
+    cl_context context = clCreateContext(NULL, 1, &device, NULL, NULL, &err);
+    CHECK_ERROR(err, "clCreateContext");
+
+    cl_command_queue queue = clCreateCommandQueue(context, device, 0, &err);
+    CHECK_ERROR(err, "clCreateCommandQueue");
+
+    // 5. Example kernel
+    const char *source =
+        "__kernel void vector_add(__global const float* a, __global const float* b, __global float* c) {"
+        "    int id = get_global_id(0);"
+        "    c[id] = a[id] + b[id];"
+        "}";
+
+    cl_program program = clCreateProgramWithSource(context, 1, &source, NULL, &err);
+    CHECK_ERROR(err, "clCreateProgramWithSource");
+
+    err = clBuildProgram(program, 1, &device, NULL, NULL, NULL);
+    if (err != CL_SUCCESS) {
+        size_t log_size;
+        clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size);
+        char *log = malloc(log_size);
+        clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, log_size, log, NULL);
+        fprintf(stderr, "❌ Build log:\n%s\n", log);
+        free(log);
+        CHECK_ERROR(err, "clBuildProgram");
+    }
+
+    printf("✅ Program built successfully.\n");
+
+    cl_kernel kernel = clCreateKernel(program, "vector_add", &err);
+    CHECK_ERROR(err, "clCreateKernel");
+
+    // 6. Prepare data
+    const int N = 10;
+    float A[N], B[N], C[N];
+    for (int i = 0; i < N; i++) {
+        A[i] = (float)i;
+        B[i] = (float)(N - i);
+    }
+
+    cl_mem bufA = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(A), A, &err);
+    CHECK_ERROR(err, "clCreateBuffer(A)");
+
+    cl_mem bufB = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(B), B, &err);
+    CHECK_ERROR(err, "clCreateBuffer(B)");
+
+    cl_mem bufC = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(C), NULL, &err);
+    CHECK_ERROR(err, "clCreateBuffer(C)");
+
+    // 7. Set kernel args
+    err  = clSetKernelArg(kernel, 0, sizeof(cl_mem), &bufA);
+    err |= clSetKernelArg(kernel, 1, sizeof(cl_mem), &bufB);
+    err |= clSetKernelArg(kernel, 2, sizeof(cl_mem), &bufC);
+    CHECK_ERROR(err, "clSetKernelArg");
+
+    // 8. Run kernel
+    size_t global = N;
+    err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, &global, NULL, 0, NULL, NULL);
+    CHECK_ERROR(err, "clEnqueueNDRangeKernel");
+
+    clFinish(queue);
+
+    // 9. Read results
+    err = clEnqueueReadBuffer(queue, bufC, CL_TRUE, 0, sizeof(C), C, 0, NULL, NULL);
+    CHECK_ERROR(err, "clEnqueueReadBuffer");
+
+    printf("\n✅ Kernel executed successfully. Results:\n");
+    for (int i = 0; i < N; i++) {
+        printf("  %.2f + %.2f = %.2f\n", A[i], B[i], C[i]);
+    }
+
+    // 10. Cleanup
+    clReleaseMemObject(bufA);
+    clReleaseMemObject(bufB);
+    clReleaseMemObject(bufC);
+    clReleaseKernel(kernel);
+    clReleaseProgram(program);
+    clReleaseCommandQueue(queue);
+    clReleaseContext(context);
+    free(platforms);
+    free(devices);
+
+    printf("\n🎉 All done!\n");
+    return 0;
+}

objects/cube.mtl

@@ -1,12 +0,0 @@
-# Blender 4.4.3 MTL File: 'None'
-# www.blender.org
-
-newmtl Material
-Ns 250.000000
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.500000 0.500000 0.500000
-Ke 0.000000 0.000000 0.000000
-Ni 1.450000
-d 1.000000
-illum 2

objects/error_object.obj

@@ -1,46 +0,0 @@
-# Blender v2.76 (sub 0) OBJ File: ''
-# www.blender.org
-mtllib cube.mtl
-o Cube
-v 1.000000 -1.000000 -1.000000
-v 1.000000 -1.000000 1.000000
-v -1.000000 -1.000000 1.000000
-v -1.000000 -1.000000 -1.000000
-v 1.000000 1.000000 -0.999999
-v 0.999999 1.000000 1.000001
-v -1.000000 1.000000 1.000000
-v -1.000000 1.000000 -1.000000
-vt 1.000000 0.333333
-vt 1.000000 0.666667
-vt 0.666667 0.666667
-vt 0.666667 0.333333
-vt 0.666667 0.000000
-vt 0.000000 0.333333
-vt 0.000000 0.000000
-vt 0.333333 0.000000
-vt 0.333333 1.000000
-vt 0.000000 1.000000
-vt 0.000000 0.666667
-vt 0.333333 0.333333
-vt 0.333333 0.666667
-vt 1.000000 0.000000
-vn 0.000000 -1.000000 0.000000
-vn 0.000000 1.000000 0.000000
-vn 1.000000 0.000000 0.000000
-vn -0.000000 0.000000 1.000000
-vn -1.000000 -0.000000 -0.000000
-vn 0.000000 0.000000 -1.000000
-usemtl Material
-s off
-f 2/1/1 3/2/1 4/3/1
-f 8/1/2 7/4/2 6/5/2
-f 5/6/3 6/7/3 2/8/3
-f 6/8/4 7/5/4 3/4/4
-f 3/9/5 7/10/5 8/11/5
-f 1/12/6 4/13/6 8/11/6
-f 1/4/1 2/1/1 4/3/1
-f 5/14/2 8/1/2 6/5/2
-f 1/12/3 5/6/3 2/8/3
-f 2/12/4 6/8/4 3/4/4
-f 4/13/5 3/9/5 8/11/5
-f 5/6/6 1/12/6 8/11/6

objects/gourd.obj

@@ -1,974 +0,0 @@
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objects/test_guy_hd.mtl

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readme.md

@@ -1,93 +1 @@
 # RasterIver, a Rendering Engine
-<p align="center">
-  <img src="https://mynameisthe.com/f/1749237242096-rasteriver_example.gif" alt="animated" >
-</p>
-
-#### RasterIver?
-Rasterizer + Iver = RasterIver
-
-## Features
-(todo: write features)
-
-## RI_FLAG List
-- `RI_FLAG_DEBUG` Turns debugging on or off
-- `RI_FLAG_DEBUG_LEVEL` Indepth-ness of debugging 
-- `RI_FLAG_SHOW_BUFFER` The "buffer" to render
-- `RI_FLAG_SHOW_FPS` Shows the FPS
-- `RI_FLAG_DEBUG_FPS` Prints FPS in the console
-- `RI_FLAG_CLEAN_POLYGONS` Clear the polygon array after RI_RequestPolyons is called
-- `RI_FLAG_POPULATE_POLYGONS` Sets random values in the polygon array
-- `RI_FLAG_BE_MASTER_RENDERER` Whether you want to use objects or to have direct access to the polygon array
-- `RI_FLAG_SHOW_FRAME` Shows the current frame #
-- `RI_FLAG_DEBUG_FRAME` Prints the current frame # in the console
-- `RI_FLAG_SHOW_INFO` Shows object info
-- `RI_FLAG_DEBUG_TICK` Turns debugging on or off for anything that would fill up the console when constantly ticking
-- `RI_FLAG_USE_CPU` Use the CPU over the GPU
-- `RI_FLAG_HANDLE_SDL_EVENTS` Whether RasterIver should handle SDL events
-
-## Requirements
-#### To Run
-- SDL2
-- SDL2 TTF
-- OpenCL Runtimes
-#### To Build
-- SDL2
-- SDL2 TTF
-- OpenCL Developer Libraries
-- ROCm if using AMD
-- CUDA if using NVIDIA
-
-
-# Todo
-- [x] make todo list
-- [ ] function to request a mesh. I.E., request a number of polygons/verticies (maybe from presets? planes, cubes, idk) and be able to edit them on the fly. Useful for dynamic terrain or something like that
-- [x] texture support
-- [x] fix interpolation issue with UV maps (and probably normals and Z values too)
-- [ ] fix horribly named variables in request object functions
-- [ ] include rasteriver.h in the kernels for better code updatability (i dont think you can do that)
-- [x] make kernels not be in strings (read the file at compile time and put it inside rasteriver.c as a string? put it in a header like how it is now?)
-- [x] change all iterator variables in for loops to have "i_" before it's variable name
-- [x] add descriptions to RI functions
-- [x] optimize object memory usage by not loading object data multiple times when the same object is requested
-- [x] add checks for invalid/nonexistant files (files like object files & texture files)
-- [x] perspective
-- [x] euler rotation
-- [ ] quaternion rotation
-- [ ] sheer transform (and other fancy ones?)
-- [ ] simple lighting using normals
-- [ ] complex lighting using rays for shadows and stuff
-- [x] polygon clipping by subdividing
-- [x] flag for using CPU instead of GPU
-- [ ] actually acurate FPS cap
-- [ ] make an option for multiple cameras, or defining a camera. I want to be able to write it to a "texture" in menory and have objects use it as their texture
-- [ ] add shaders. Maybe have shader kernels? I have no idea how you would implement that but it sounds cool
-- [x] make the returned array from RI_RequestObjects easier to write to I.E., not a 1D array. Maybe have it so you could do objects[obj #].x_position or something like that. I wonder if I could implement functions with that, too, so you could do objects.get_first_element()
-- [ ] object higherarchies (maybe not. This is moving towards game engine territory. Once I get this into a working release, I'll start working on a game engine)
-- [ ] deltaTime variable or function. (function that returns pointer? function that returns the last deltatime value?)
-- [x] make a function to set a custom debug prefix
-- [ ] add multiple texture support for objects
-- [ ] add support for normal maps
-- [ ] add support for bump/height/displacement maps
-- [ ] add support for transparent textures
-- [ ] allow objects to have no texture
-- [ ] make checks for objects trying to have a texture, but no UV coords (generate them?)
-- [x] FOV
-- [x] add materials
-- [x] make another kernel that calculated transforms & perspective before rasterizing
-- [ ] add ability to request objects multiple times 
-- [ ] give objects IDs or some way to track them so that you can remove them dynamically
-- [ ] make CUDA version because OpenCL is slow with NVIDIA
-- [x] [this wasn't actually a problem. I had -999999999 for r_w but switched how the inputs are. It was rotatiing things -99999999 rad and looked like it was off] fix center of perspective being in the wrong spot
-- [ ] make function for world scale/master scale (scales everything. from origin? from object origins?)
-- [x] I think calculations for debugging memory usage are outdated/wrong
-- [ ] use correct types for stuff (like size_t)
-- [ ] add target resolution
-- [ ] find a faster way to draw pixels to the window
-- [ ] replace "RI_RequestObjects" with 2 functions, RI_CreateObject (which returns a pointer to the object) and RI_LoadObjectFile (which takes in an object file and a pointer). It'll be tough making the object data arrays basically dynamic, but it shouldn't be too hard. Maybe I'll make a termination sequence after each object's data points. Like [x, y, z..... NULL, 0, INFINITY, x, y, z......]. If I know the object I want to delete, I know the start and stopping points of all it's data points. All I have to do is cut them out. Is there a way to squish it back together though? Maybe I could shift all the other data points down, but if there is a substantial amount of them after the cut one, it could take forever.
-- [ ] antialiasing
-- [ ] fix gaps in thin lines
-- [ ] add "transformed" before verticies and normals memory buffers in main kernel to make it less confusing
-- [ ] add overdraw "buffer"
-- [ ] fix spaghetti code
-- [ ] add polygon clipping to GPU
-- [ ] add command line arguments like to select desired GPU 

run

@@ -1 +1 @@
-./builds/final\ binaries/main.bin
+./builds/main.bin

src/RasterIver/headers/bugMath.h

@@ -1,210 +0,0 @@
-#include <math.h>
-
-//SIXBUGSTHREEBRANCHES VERIFIED HEADER
-
-#ifndef BUGMATH_H
-#define BUGMATH_H
-
-
-typedef struct {
-    float x;
-    float y;
-} Vec2;
-
-Vec2 vec2_add(Vec2 a, Vec2 b){
-    Vec2 result = {a.x + b.x, a.y + b.y};
-
-    return result;
-}
-
-Vec2 vec2_sub(Vec2 a, Vec2 b){
-    Vec2 result = {a.x - b.x, a.y - b.y};
-
-    return result;
-}
-
-Vec2 vec2_ham(Vec2 a, Vec2 b){
-    Vec2 result = {a.x * b.x, a.y * b.y};
-
-    return result;
-}
-
-Vec2 vec2_div(Vec2 a, Vec2 b){
-    Vec2 result = {a.x / b.x, a.y / b.y};
-
-    return result;
-}
-
-Vec2 vec2_scale_m(Vec2 v, float scalar){
-    Vec2 result = {v.x*scalar, v.y*scalar};
-
-    return result;
-}
-
-Vec2 vec2_scale_d(Vec2 v, float scalar){
-    Vec2 result = {v.x/scalar, v.y/scalar};
-
-    return result;
-}
-
-Vec2 vec2_perp(Vec2 v){
-    Vec2 result = {-v.y, v.x};
-
-    return result;
-}
-
-float vec2_mag(Vec2 v){
-    float mag = v.x*v.x + v.y*v.y;
-    if(mag == 1.0f){
-        return mag;
-    }
-    return sqrtf(mag);
-}
-
-Vec2 vec2_norm(Vec2 v){
-    return vec2_scale_d(v, vec2_mag(v));
-}
-
-float vec2_dot(Vec2 a, Vec2 b){
-    return a.x*b.x + a.y*b.y;
-}
-
-
-
-typedef struct {
-    float x;
-    float y;
-    float z;
-} Vec3;
-
-Vec3 vec3_add(Vec3 a, Vec3 b){
-    Vec3 result = {a.x + b.x, a.y + b.y, a.z + b.z};
-
-    return result;
-}
-
-Vec3 vec3_sub(Vec3 a, Vec3 b){
-    Vec3 result = {a.x - b.x, a.y - b.y, a.z - b.z};
-
-    return result;
-}
-
-Vec3 vec3_ham(Vec3 a, Vec3 b){
-    Vec3 result = {a.x * b.x, a.y * b.y, a.z * b.z};
-
-    return result;
-}
-
-Vec3 vec3_div(Vec3 a, Vec3 b){
-    Vec3 result = {a.x / b.x, a.y / b.y, a.z / b.z};
-
-    return result;
-}
-
-float vec3_dot(Vec3 a, Vec3 b){
-    return a.x*b.x + a.y*b.y + a.z*b.z;
-}
-
-Vec3 vec3_cross(Vec3 a, Vec3 b){
-    Vec3 result = {a.y*b.z - b.y*a.z, a.z*b.x - b.z*a.x, a.x*b.y - b.x*a.y};;
-
-    return result;
-}
-
-Vec3 vec3_scale_m(Vec3 v, float scalar){
-    Vec3 result = {v.x*scalar, v.y*scalar, v.z*scalar};
-
-    return result;
-}
-
-Vec3 vec3_scale_d(Vec3 v, float scalar){
-    Vec3 result = {v.x/scalar, v.y/scalar, v.z/scalar};
-
-    return result;
-}
-
-float vec3_mag(Vec3 v){
-    float mag = v.x*v.x + v.y*v.y + v.z*v.z;
-    if(mag == 1.0f){
-        return mag;
-    }
-    return sqrtf(mag);
-}
-
-Vec3 vec3_norm(Vec3 v){
-    return vec3_scale_d(v, vec3_mag(v));
-}
-
-
-
-
-typedef struct {
-    float w;
-    float x;
-    float y;
-    float z;
-} Vec4;
-
-Vec4 vec4_add(Vec4 a, Vec4 b){
-    Vec4 result = {a.w + b.w, a.x + b.x, a.y + b.y, a.z + b.z};
-
-    return result;
-}
-
-Vec4 vec4_sub(Vec4 a, Vec4 b){
-    Vec4 result = {a.w - b.w, a.x - b.x, a.y - b.y, a.z - b.z};
-
-    return result;
-}
-
-Vec4 vec4_ham(Vec4 a, Vec4 b){
-    Vec4 result = {a.w * b.w, a.x * b.x, a.y * b.y, a.z * b.z};
-
-    return result;
-}
-
-Vec4 vec4_div(Vec4 a, Vec4 b){
-    Vec4 result = {a.w / b.w, a.x / b.x, a.y / b.y, a.z / b.z};
-
-    return result;
-}
-
-Vec4 quat_mul(Vec4 a, Vec4 b){
-    Vec4 result;
-
-    result.w = (a.w*b.w - a.x*b.x - a.y*b.y - a.z*b.z);
-    result.x = (a.w*b.x + a.x*b.w + a.y*b.z - a.z*b.y);
-    result.y = (a.w*b.y - a.x*b.z + a.y*b.w + a.z*b.x);
-    result.z = (a.w*b.z + a.x*b.y - a.y*b.x + a.z*b.w);
-    
-    return result;
-}
-
-float vec4_dot(Vec4 a, Vec4 b){
-    return a.w*b.w + a.x*b.x + a.y*b.y + a.z*b.z;
-}
-
-Vec4 vec4_scale_m(Vec4 q, float scalar){
-    Vec4 result = {q.w*scalar, q.x*scalar, q.y*scalar, q.z*scalar};
-    return result;
-}
-
-Vec4 vec4_scale_d(Vec4 q, float scalar){
-    Vec4 result = {q.w/scalar, q.x/scalar, q.y/scalar, q.z/scalar};
-    return result;
-}
-
-float vec4_mag(Vec4 q){
-    float mag = q.w*q.w + q.x*q.x + q.y*q.y + q.z*q.z;
-    if(mag == 1.0f){
-        return mag;
-    }
-    return sqrtf(mag);
-}
-
-Vec4 vec4_norm(Vec4 q){
-    return vec4_scale_d(q, vec4_mag(q));
-}
-
-
-#endif

src/RasterIver/headers/object.h

@@ -1,82 +0,0 @@
-#ifndef OBJECT_H
-#define OBJECT_H
-
-#include <CL/cl_platform.h>
-
-typedef struct {
-    float x;
-    float y;
-} Vec2;
-
-Vec2 lerp(Vec2 pos1, Vec2 pos2, float fraction){
-    Vec2 result;
-
-    float w0 = 1.0 - fraction;
-    float w1 = fraction;
-
-    result.x = pos1.x * w0 + pos2.x * w1;
-    result.y = pos1.y * w0 + pos2.y * w1;
-
-    return result;
-
-}
-
-typedef struct __attribute__((aligned(4))) {
-    cl_uchar a; // 1
-    cl_uchar r; // 1
-    cl_uchar g; // 1
-    cl_uchar b; // 1
-} ColorARGB; // size: 4, align: 4
-
-typedef struct __attribute__((aligned(4))) {
-    ColorARGB albedo;     // 4
-    cl_int textureOffset; // 4
-    cl_int normalMapOffset; // 4
-    cl_int bumpMapOffset; // 4
-    cl_ulong properties; // 8
-} Material; // size 24
-
-typedef struct __attribute__((aligned(16))) {
-    cl_float x; // 4
-    cl_float y; // 4
-    cl_float z; // 4
-    cl_float _pad0; // padding to align to 16 bytes
-} Vec3;
-
-typedef struct __attribute__((aligned(16))) {
-    cl_float w;
-    cl_float x;
-    cl_float y;
-    cl_float z;
-} Vec4;
-
-typedef struct __attribute__((aligned(16))) {
-    Vec3 position;  // 16 bytes
-    Vec3 scale;     // 16 bytes
-    Vec4 rotation;  // 16 bytes
-} Transform; // size: 48 bytes
-
-typedef struct __attribute__((aligned(4))) {
-    cl_int transformedVertexOffset;
-    cl_int transformedNormalOffset;
-    cl_int triangleCount;
-    cl_int vertexCount;
-    cl_int normalCount;
-    cl_int uvCount;
-    cl_int triangleOffset;
-    cl_int vertexOffset;
-    cl_int normalOffset;
-    cl_int uvOffset;
-} ModelInfo; // 10 × 4 = 40 bytes
-
-typedef struct __attribute__((aligned(16))) {
-    Transform transform;   // 64
-    ModelInfo modelInfo;   // 40
-    cl_int id;             // 4
-    cl_int split_triangles;          // 4 (pad so Material starts at 8-byte boundary)
-    Material material;     // 8
-    cl_int _pad2;          // 4 (pad to make Object size 128 bytes)
-    cl_int _pad3;          // 4
-} Object; // total: 64 + 40 + 4 + 4 + 8 + 4 + 4 = 128 bytes
-
-#endif

src/RasterIver/headers/rasteriver.h

@@ -1,172 +0,0 @@
-#ifndef RASTERIVER_H
-#define RASTERIVER_H
-
-#define STB_IMAGE_IMPLEMENTATION
-#include "stb_image.h"
-#include <stdint.h>
-#include <SDL2/SDL.h>
-#include "object.h"
-
-typedef int RI_result;
-typedef int RI_flag;
-typedef int RI_value;
-typedef uint32_t RI_uint;
-typedef float* RI_polygons;
-typedef float* RI_verticies;
-typedef int* RI_triangles;
-typedef Object* RI_objects;
-typedef unsigned char* RI_textures;
-
-// the size of each object instance in the objects array
-// xyz + rot(xyz) + scale(xyz) = 9
-// 9 + polygon count + polygon index + vertex index + normal index + UV index + texture index + rotation w = 16
-#define object_size 16
-
-// vertex size
-// the size of each instance of verticies
-#define vs 3
-
-// triangle size
-// 3 xyz 3 normals 3 uvs 
-#define ts 9
-
-// texture info size
-// width + height + value offset = 3
-#define tis 3
-
-#define transformed_verticies_size 12
-
-// PI
-#define RI_PI 3.14159265359
-#define RI_2PI 6.28318530718
-
-typedef struct {
-    float x, y, z, r_x, r_y, r_z, r_w, s_x, s_y, s_z;
-    uint64_t material_flags;
-    char file_path[40];
-    char texture[40];
-} RI_newObject;
-
-typedef struct {
-    int verticies, normals, uvs, faces, length_of_texture;
-} load_object_return;
-
-// RI_result
-typedef enum {
-    RI_ERROR        = -1,
-    RI_SUCCESS      =  0,
-    RI_NOT_RUNNING  = -2,
-    RI_RUNNING      =  1,
-    RI_INVALID_FLAG = -3,
-    RI_INVALID_VALUE = -4,
-} RI_result_enum;
-
-// RI_flag
-typedef enum {
-    RI_FLAG_DEBUG               = 0,
-    RI_FLAG_DEBUG_LEVEL         = 1,
-    RI_FLAG_SHOW_BUFFER         = 2,
-    RI_FLAG_SHOW_FPS            = 3,
-    RI_FLAG_DEBUG_FPS           = 4,
-    RI_FLAG_CLEAN_POLYGONS      = 5,
-    RI_FLAG_POPULATE_POLYGONS   = 6,
-    RI_FLAG_BE_MASTER_RENDERER  = 7,
-    RI_FLAG_DEBUG_FRAME         = 8,
-    RI_FLAG_SHOW_FRAME          = 9,
-    RI_FLAG_SHOW_INFO           = 10,
-    RI_FLAG_DEBUG_TICK          = 11,
-    RI_FLAG_USE_CPU             = 12,
-    RI_FLAG_HANDLE_SDL_EVENTS   = 13,
-} RI_flag_enum;
-
-typedef enum {
-    RI_VALUE_WIREFRAME_SCALE = 0,
-    RI_VALUE_SELECTED_TRIANGLE = 1,
-    RI_VALUE_MINIMUM_CLIP = 2,
-} RI_value_enum;
-
-// RI_BUFFER
-typedef enum {
-    RI_BUFFER_COMPLETE  = 0,
-    RI_BUFFER_Z         = 1,
-    RI_BUFFER_NORMAL    = 2,
-    RI_BUFFER_UV        = 3,
-} RI_buffer_enum;
-
-// RI_DEBUG
-typedef enum {
-    RI_DEBUG_LOW      = 0,
-    RI_DEBUG_MEDIUM   = 1,
-    RI_DEBUG_HIGH     = 2,
-} RI_debug_enum;
-
-typedef enum {
-    RI_MATERIAL_UNLIT = ((uint64_t)1 << 0), // should calculate lighting
-    RI_MATERIAL_DONT_CAST_SHADOW = ((uint64_t)1 << 1), // should cast shadow on other objects
-    RI_MATERIAL_HAS_TEXTURE = ((uint64_t)1 << 2), // has a texture
-    RI_MATERIAL_HAS_NORMAL_MAP = ((uint64_t)1 << 3), // has a normal map
-    RI_MATERIAL_HAS_BUMP_MAP = ((uint64_t)1 << 4), // has a bump map
-    RI_MATERIAL_TRANSPARENT = ((uint64_t)1 << 5), // has transparency
-    RI_MATERIAL_WIREFRAME = ((uint64_t)1 << 6), // render as wireframe
-    RI_MATERIAL_DONT_RECEIVE_SHADOW = ((uint64_t)1 << 7), // should shadows render on it
-    RI_MATERIAL_DONT_DEPTH_TEST = ((uint64_t)1 << 8), // should check Z buffer (if 1, render on top of everything)
-    RI_MATERIAL_DONT_DEPTH_WRITE = ((uint64_t)1 << 9), // should write to the Z buffer (if 1, render behind everything)
-    RI_MATERIAL_DOUBLE_SIDED = ((uint64_t)1 << 10), // ignore backface culling
-} RI_material_properties_enum;
-
-typedef enum {
-    RI_PMP_TEXTURED = RI_MATERIAL_HAS_TEXTURE,
-} RI_preset_material_properties;
-
-// RI_BOOL
-typedef enum {
-    RI_TRUE      = 1,
-    RI_FALSE   = 0,
-} RI_bool_enum;
-
-// Initializes OpenCL, SDL2, and anything else Rasteriver needs to function
-RI_result   RI_Init();
-
-// Safely stops Rasteriver
-RI_result   RI_Stop();
-
-// Checks if Rasteriver is still running and returns if it is
-RI_result   RI_IsRunning();
-
-// Asks Rasteriver to allocate space for a number of polygons
-// Returns a pointer to the new object
-int* RI_RequestMesh(int RI_PolygonsToRequest);
-
-// Asks Rasteriver to allocate and load objects
-// Returns a pointer to the objects array
-RI_objects  RI_RequestObjects(RI_newObject *RI_ObjectBuffer, int RI_ObjectsToRequest);
-
-// Ticks Rasteriver
-RI_result   RI_Tick();
-
-// Sets the background color
-RI_result   RI_SetBackground(RI_uint RI_BackgroundColor);
-
-// Depricated
-// Shows the Z buffer
-RI_result   RI_ShowZBuffer(int RI_ShowZBufferFlag);
-
-// Sets a flag
-RI_result   RI_SetFlag(RI_flag RI_FlagToSet, int RI_Value);
-
-// Sets a value
-RI_result   RI_SetValue(RI_value RI_ValueToSet, float RI_Value);
-
-// Sets the FPS limit
-RI_result   RI_SetFpsCap(int RI_FpsCap);
-
-// Depricated
-// Returns a list of Rasteriver flags
-RI_result   RI_ListFlags();
-
-// Sets the prefix when debugging
-// Takes a 49 char string (50 including \0)
-// Default is [RasterIver] 
-RI_result RI_SetDebugPrefix(char RI_Prefix[50]);
-
-#endif // RASTERIVER_H

src/RasterIver/headers/stb_image.h

@@ -1,7988 +0,0 @@
-/* stb_image - v2.30 - public domain image loader - http://nothings.org/stb
-                                  no warranty implied; use at your own risk
-
-   Do this:
-      #define STB_IMAGE_IMPLEMENTATION
-   before you include this file in *one* C or C++ file to create the implementation.
-
-   // i.e. it should look like this:
-   #include ...
-   #include ...
-   #include ...
-   #define STB_IMAGE_IMPLEMENTATION
-   #include "stb_image.h"
-
-   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
-   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free
-
-
-   QUICK NOTES:
-      Primarily of interest to game developers and other people who can
-          avoid problematic images and only need the trivial interface
-
-      JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
-      PNG 1/2/4/8/16-bit-per-channel
-
-      TGA (not sure what subset, if a subset)
-      BMP non-1bpp, non-RLE
-      PSD (composited view only, no extra channels, 8/16 bit-per-channel)
-
-      GIF (*comp always reports as 4-channel)
-      HDR (radiance rgbE format)
-      PIC (Softimage PIC)
-      PNM (PPM and PGM binary only)
-
-      Animated GIF still needs a proper API, but here's one way to do it:
-          http://gist.github.com/urraka/685d9a6340b26b830d49
-
-      - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
-      - decode from arbitrary I/O callbacks
-      - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
-
-   Full documentation under "DOCUMENTATION" below.
-
-
-LICENSE
-
-  See end of file for license information.
-
-RECENT REVISION HISTORY:
-
-      2.30  (2024-05-31) avoid erroneous gcc warning
-      2.29  (2023-05-xx) optimizations
-      2.28  (2023-01-29) many error fixes, security errors, just tons of stuff
-      2.27  (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes
-      2.26  (2020-07-13) many minor fixes
-      2.25  (2020-02-02) fix warnings
-      2.24  (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically
-      2.23  (2019-08-11) fix clang static analysis warning
-      2.22  (2019-03-04) gif fixes, fix warnings
-      2.21  (2019-02-25) fix typo in comment
-      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
-      2.19  (2018-02-11) fix warning
-      2.18  (2018-01-30) fix warnings
-      2.17  (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
-      2.16  (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes
-      2.15  (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC
-      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
-      2.13  (2016-12-04) experimental 16-bit API, only for PNG so far; fixes
-      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
-      2.11  (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64
-                         RGB-format JPEG; remove white matting in PSD;
-                         allocate large structures on the stack;
-                         correct channel count for PNG & BMP
-      2.10  (2016-01-22) avoid warning introduced in 2.09
-      2.09  (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
-
-   See end of file for full revision history.
-
-
- ============================    Contributors    =========================
-
- Image formats                          Extensions, features
-    Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
-    Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
-    Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
-    Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
-    Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
-    Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
-    Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
-    github:urraka (animated gif)           Junggon Kim (PNM comments)
-    Christopher Forseth (animated gif)     Daniel Gibson (16-bit TGA)
-                                           socks-the-fox (16-bit PNG)
-                                           Jeremy Sawicki (handle all ImageNet JPGs)
- Optimizations & bugfixes                  Mikhail Morozov (1-bit BMP)
-    Fabian "ryg" Giesen                    Anael Seghezzi (is-16-bit query)
-    Arseny Kapoulkine                      Simon Breuss (16-bit PNM)
-    John-Mark Allen
-    Carmelo J Fdez-Aguera
-
- Bug & warning fixes
-    Marc LeBlanc            David Woo          Guillaume George     Martins Mozeiko
-    Christpher Lloyd        Jerry Jansson      Joseph Thomson       Blazej Dariusz Roszkowski
-    Phil Jordan                                Dave Moore           Roy Eltham
-    Hayaki Saito            Nathan Reed        Won Chun
-    Luke Graham             Johan Duparc       Nick Verigakis       the Horde3D community
-    Thomas Ruf              Ronny Chevalier                         github:rlyeh
-    Janez Zemva             John Bartholomew   Michal Cichon        github:romigrou
-    Jonathan Blow           Ken Hamada         Tero Hanninen        github:svdijk
-    Eugene Golushkov        Laurent Gomila     Cort Stratton        github:snagar
-    Aruelien Pocheville     Sergio Gonzalez    Thibault Reuille     github:Zelex
-    Cass Everitt            Ryamond Barbiero                        github:grim210
-    Paul Du Bois            Engin Manap        Aldo Culquicondor    github:sammyhw
-    Philipp Wiesemann       Dale Weiler        Oriol Ferrer Mesia   github:phprus
-    Josh Tobin              Neil Bickford      Matthew Gregan       github:poppolopoppo
-    Julian Raschke          Gregory Mullen     Christian Floisand   github:darealshinji
-    Baldur Karlsson         Kevin Schmidt      JR Smith             github:Michaelangel007
-                            Brad Weinberger    Matvey Cherevko      github:mosra
-    Luca Sas                Alexander Veselov  Zack Middleton       [reserved]
-    Ryan C. Gordon          [reserved]                              [reserved]
-                     DO NOT ADD YOUR NAME HERE
-
-                     Jacko Dirks
-
-  To add your name to the credits, pick a random blank space in the middle and fill it.
-  80% of merge conflicts on stb PRs are due to people adding their name at the end
-  of the credits.
-*/
-
-#ifndef STBI_INCLUDE_STB_IMAGE_H
-#define STBI_INCLUDE_STB_IMAGE_H
-
-// DOCUMENTATION
-//
-// Limitations:
-//    - no 12-bit-per-channel JPEG
-//    - no JPEGs with arithmetic coding
-//    - GIF always returns *comp=4
-//
-// Basic usage (see HDR discussion below for HDR usage):
-//    int x,y,n;
-//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
-//    // ... process data if not NULL ...
-//    // ... x = width, y = height, n = # 8-bit components per pixel ...
-//    // ... replace '0' with '1'..'4' to force that many components per pixel
-//    // ... but 'n' will always be the number that it would have been if you said 0
-//    stbi_image_free(data);
-//
-// Standard parameters:
-//    int *x                 -- outputs image width in pixels
-//    int *y                 -- outputs image height in pixels
-//    int *channels_in_file  -- outputs # of image components in image file
-//    int desired_channels   -- if non-zero, # of image components requested in result
-//
-// The return value from an image loader is an 'unsigned char *' which points
-// to the pixel data, or NULL on an allocation failure or if the image is
-// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
-// with each pixel consisting of N interleaved 8-bit components; the first
-// pixel pointed to is top-left-most in the image. There is no padding between
-// image scanlines or between pixels, regardless of format. The number of
-// components N is 'desired_channels' if desired_channels is non-zero, or
-// *channels_in_file otherwise. If desired_channels is non-zero,
-// *channels_in_file has the number of components that _would_ have been
-// output otherwise. E.g. if you set desired_channels to 4, you will always
-// get RGBA output, but you can check *channels_in_file to see if it's trivially
-// opaque because e.g. there were only 3 channels in the source image.
-//
-// An output image with N components has the following components interleaved
-// in this order in each pixel:
-//
-//     N=#comp     components
-//       1           grey
-//       2           grey, alpha
-//       3           red, green, blue
-//       4           red, green, blue, alpha
-//
-// If image loading fails for any reason, the return value will be NULL,
-// and *x, *y, *channels_in_file will be unchanged. The function
-// stbi_failure_reason() can be queried for an extremely brief, end-user
-// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
-// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
-// more user-friendly ones.
-//
-// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
-//
-// To query the width, height and component count of an image without having to
-// decode the full file, you can use the stbi_info family of functions:
-//
-//   int x,y,n,ok;
-//   ok = stbi_info(filename, &x, &y, &n);
-//   // returns ok=1 and sets x, y, n if image is a supported format,
-//   // 0 otherwise.
-//
-// Note that stb_image pervasively uses ints in its public API for sizes,
-// including sizes of memory buffers. This is now part of the API and thus
-// hard to change without causing breakage. As a result, the various image
-// loaders all have certain limits on image size; these differ somewhat
-// by format but generally boil down to either just under 2GB or just under
-// 1GB. When the decoded image would be larger than this, stb_image decoding
-// will fail.
-//
-// Additionally, stb_image will reject image files that have any of their
-// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS,
-// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit,
-// the only way to have an image with such dimensions load correctly
-// is for it to have a rather extreme aspect ratio. Either way, the
-// assumption here is that such larger images are likely to be malformed
-// or malicious. If you do need to load an image with individual dimensions
-// larger than that, and it still fits in the overall size limit, you can
-// #define STBI_MAX_DIMENSIONS on your own to be something larger.
-//
-// ===========================================================================
-//
-// UNICODE:
-//
-//   If compiling for Windows and you wish to use Unicode filenames, compile
-//   with
-//       #define STBI_WINDOWS_UTF8
-//   and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
-//   Windows wchar_t filenames to utf8.
-//
-// ===========================================================================
-//
-// Philosophy
-//
-// stb libraries are designed with the following priorities:
-//
-//    1. easy to use
-//    2. easy to maintain
-//    3. good performance
-//
-// Sometimes I let "good performance" creep up in priority over "easy to maintain",
-// and for best performance I may provide less-easy-to-use APIs that give higher
-// performance, in addition to the easy-to-use ones. Nevertheless, it's important
-// to keep in mind that from the standpoint of you, a client of this library,
-// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all.
-//
-// Some secondary priorities arise directly from the first two, some of which
-// provide more explicit reasons why performance can't be emphasized.
-//
-//    - Portable ("ease of use")
-//    - Small source code footprint ("easy to maintain")
-//    - No dependencies ("ease of use")
-//
-// ===========================================================================
-//
-// I/O callbacks
-//
-// I/O callbacks allow you to read from arbitrary sources, like packaged
-// files or some other source. Data read from callbacks are processed
-// through a small internal buffer (currently 128 bytes) to try to reduce
-// overhead.
-//
-// The three functions you must define are "read" (reads some bytes of data),
-// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end).
-//
-// ===========================================================================
-//
-// SIMD support
-//
-// The JPEG decoder will try to automatically use SIMD kernels on x86 when
-// supported by the compiler. For ARM Neon support, you must explicitly
-// request it.
-//
-// (The old do-it-yourself SIMD API is no longer supported in the current
-// code.)
-//
-// On x86, SSE2 will automatically be used when available based on a run-time
-// test; if not, the generic C versions are used as a fall-back. On ARM targets,
-// the typical path is to have separate builds for NEON and non-NEON devices
-// (at least this is true for iOS and Android). Therefore, the NEON support is
-// toggled by a build flag: define STBI_NEON to get NEON loops.
-//
-// If for some reason you do not want to use any of SIMD code, or if
-// you have issues compiling it, you can disable it entirely by
-// defining STBI_NO_SIMD.
-//
-// ===========================================================================
-//
-// HDR image support   (disable by defining STBI_NO_HDR)
-//
-// stb_image supports loading HDR images in general, and currently the Radiance
-// .HDR file format specifically. You can still load any file through the existing
-// interface; if you attempt to load an HDR file, it will be automatically remapped
-// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
-// both of these constants can be reconfigured through this interface:
-//
-//     stbi_hdr_to_ldr_gamma(2.2f);
-//     stbi_hdr_to_ldr_scale(1.0f);
-//
-// (note, do not use _inverse_ constants; stbi_image will invert them
-// appropriately).
-//
-// Additionally, there is a new, parallel interface for loading files as
-// (linear) floats to preserve the full dynamic range:
-//
-//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
-//
-// If you load LDR images through this interface, those images will
-// be promoted to floating point values, run through the inverse of
-// constants corresponding to the above:
-//
-//     stbi_ldr_to_hdr_scale(1.0f);
-//     stbi_ldr_to_hdr_gamma(2.2f);
-//
-// Finally, given a filename (or an open file or memory block--see header
-// file for details) containing image data, you can query for the "most
-// appropriate" interface to use (that is, whether the image is HDR or
-// not), using:
-//
-//     stbi_is_hdr(char *filename);
-//
-// ===========================================================================
-//
-// iPhone PNG support:
-//
-// We optionally support converting iPhone-formatted PNGs (which store
-// premultiplied BGRA) back to RGB, even though they're internally encoded
-// differently. To enable this conversion, call
-// stbi_convert_iphone_png_to_rgb(1).
-//
-// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
-// pixel to remove any premultiplied alpha *only* if the image file explicitly
-// says there's premultiplied data (currently only happens in iPhone images,
-// and only if iPhone convert-to-rgb processing is on).
-//
-// ===========================================================================
-//
-// ADDITIONAL CONFIGURATION
-//
-//  - You can suppress implementation of any of the decoders to reduce
-//    your code footprint by #defining one or more of the following
-//    symbols before creating the implementation.
-//
-//        STBI_NO_JPEG
-//        STBI_NO_PNG
-//        STBI_NO_BMP
-//        STBI_NO_PSD
-//        STBI_NO_TGA
-//        STBI_NO_GIF
-//        STBI_NO_HDR
-//        STBI_NO_PIC
-//        STBI_NO_PNM   (.ppm and .pgm)
-//
-//  - You can request *only* certain decoders and suppress all other ones
-//    (this will be more forward-compatible, as addition of new decoders
-//    doesn't require you to disable them explicitly):
-//
-//        STBI_ONLY_JPEG
-//        STBI_ONLY_PNG
-//        STBI_ONLY_BMP
-//        STBI_ONLY_PSD
-//        STBI_ONLY_TGA
-//        STBI_ONLY_GIF
-//        STBI_ONLY_HDR
-//        STBI_ONLY_PIC
-//        STBI_ONLY_PNM   (.ppm and .pgm)
-//
-//   - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
-//     want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
-//
-//  - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater
-//    than that size (in either width or height) without further processing.
-//    This is to let programs in the wild set an upper bound to prevent
-//    denial-of-service attacks on untrusted data, as one could generate a
-//    valid image of gigantic dimensions and force stb_image to allocate a
-//    huge block of memory and spend disproportionate time decoding it. By
-//    default this is set to (1 << 24), which is 16777216, but that's still
-//    very big.
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif // STBI_NO_STDIO
-
-#define STBI_VERSION 1
-
-enum
-{
-   STBI_default = 0, // only used for desired_channels
-
-   STBI_grey       = 1,
-   STBI_grey_alpha = 2,
-   STBI_rgb        = 3,
-   STBI_rgb_alpha  = 4
-};
-
-#include <stdlib.h>
-typedef unsigned char stbi_uc;
-typedef unsigned short stbi_us;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef STBIDEF
-#ifdef STB_IMAGE_STATIC
-#define STBIDEF static
-#else
-#define STBIDEF extern
-#endif
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// PRIMARY API - works on images of any type
-//
-
-//
-// load image by filename, open file, or memory buffer
-//
-
-typedef struct
-{
-   int      (*read)  (void *user,char *data,int size);   // fill 'data' with 'size' bytes.  return number of bytes actually read
-   void     (*skip)  (void *user,int n);                 // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
-   int      (*eof)   (void *user);                       // returns nonzero if we are at end of file/data
-} stbi_io_callbacks;
-
-////////////////////////////////////
-//
-// 8-bits-per-channel interface
-//
-
-STBIDEF stbi_uc *stbi_load_from_memory   (stbi_uc           const *buffer, int len   , int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk  , void *user, int *x, int *y, int *channels_in_file, int desired_channels);
-
-#ifndef STBI_NO_STDIO
-STBIDEF stbi_uc *stbi_load            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_uc *stbi_load_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
-// for stbi_load_from_file, file pointer is left pointing immediately after image
-#endif
-
-#ifndef STBI_NO_GIF
-STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
-#endif
-
-#ifdef STBI_WINDOWS_UTF8
-STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
-#endif
-
-////////////////////////////////////
-//
-// 16-bits-per-channel interface
-//
-
-STBIDEF stbi_us *stbi_load_16_from_memory   (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels);
-
-#ifndef STBI_NO_STDIO
-STBIDEF stbi_us *stbi_load_16          (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
-#endif
-
-////////////////////////////////////
-//
-// float-per-channel interface
-//
-#ifndef STBI_NO_LINEAR
-   STBIDEF float *stbi_loadf_from_memory     (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
-   STBIDEF float *stbi_loadf_from_callbacks  (stbi_io_callbacks const *clbk, void *user, int *x, int *y,  int *channels_in_file, int desired_channels);
-
-   #ifndef STBI_NO_STDIO
-   STBIDEF float *stbi_loadf            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
-   STBIDEF float *stbi_loadf_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
-   #endif
-#endif
-
-#ifndef STBI_NO_HDR
-   STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma);
-   STBIDEF void   stbi_hdr_to_ldr_scale(float scale);
-#endif // STBI_NO_HDR
-
-#ifndef STBI_NO_LINEAR
-   STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma);
-   STBIDEF void   stbi_ldr_to_hdr_scale(float scale);
-#endif // STBI_NO_LINEAR
-
-// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
-STBIDEF int    stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user);
-STBIDEF int    stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
-#ifndef STBI_NO_STDIO
-STBIDEF int      stbi_is_hdr          (char const *filename);
-STBIDEF int      stbi_is_hdr_from_file(FILE *f);
-#endif // STBI_NO_STDIO
-
-
-// get a VERY brief reason for failure
-// on most compilers (and ALL modern mainstream compilers) this is threadsafe
-STBIDEF const char *stbi_failure_reason  (void);
-
-// free the loaded image -- this is just free()
-STBIDEF void     stbi_image_free      (void *retval_from_stbi_load);
-
-// get image dimensions & components without fully decoding
-STBIDEF int      stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
-STBIDEF int      stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp);
-STBIDEF int      stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len);
-STBIDEF int      stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user);
-
-#ifndef STBI_NO_STDIO
-STBIDEF int      stbi_info               (char const *filename,     int *x, int *y, int *comp);
-STBIDEF int      stbi_info_from_file     (FILE *f,                  int *x, int *y, int *comp);
-STBIDEF int      stbi_is_16_bit          (char const *filename);
-STBIDEF int      stbi_is_16_bit_from_file(FILE *f);
-#endif
-
-
-
-// for image formats that explicitly notate that they have premultiplied alpha,
-// we just return the colors as stored in the file. set this flag to force
-// unpremultiplication. results are undefined if the unpremultiply overflow.
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
-
-// indicate whether we should process iphone images back to canonical format,
-// or just pass them through "as-is"
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
-
-// flip the image vertically, so the first pixel in the output array is the bottom left
-STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
-
-// as above, but only applies to images loaded on the thread that calls the function
-// this function is only available if your compiler supports thread-local variables;
-// calling it will fail to link if your compiler doesn't
-STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply);
-STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert);
-STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
-
-// ZLIB client - used by PNG, available for other purposes
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
-STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header);
-STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);
-STBIDEF int   stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
-
-STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);
-STBIDEF int   stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
-
-
-#ifdef __cplusplus
-}
-#endif
-
-//
-//
-////   end header file   /////////////////////////////////////////////////////
-#endif // STBI_INCLUDE_STB_IMAGE_H
-
-#ifdef STB_IMAGE_IMPLEMENTATION
-
-#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \
-  || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \
-  || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \
-  || defined(STBI_ONLY_ZLIB)
-   #ifndef STBI_ONLY_JPEG
-   #define STBI_NO_JPEG
-   #endif
-   #ifndef STBI_ONLY_PNG
-   #define STBI_NO_PNG
-   #endif
-   #ifndef STBI_ONLY_BMP
-   #define STBI_NO_BMP
-   #endif
-   #ifndef STBI_ONLY_PSD
-   #define STBI_NO_PSD
-   #endif
-   #ifndef STBI_ONLY_TGA
-   #define STBI_NO_TGA
-   #endif
-   #ifndef STBI_ONLY_GIF
-   #define STBI_NO_GIF
-   #endif
-   #ifndef STBI_ONLY_HDR
-   #define STBI_NO_HDR
-   #endif
-   #ifndef STBI_ONLY_PIC
-   #define STBI_NO_PIC
-   #endif
-   #ifndef STBI_ONLY_PNM
-   #define STBI_NO_PNM
-   #endif
-#endif
-
-#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
-#define STBI_NO_ZLIB
-#endif
-
-
-#include <stdarg.h>
-#include <stddef.h> // ptrdiff_t on osx
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
-#include <math.h>  // ldexp, pow
-#endif
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif
-
-#ifndef STBI_ASSERT
-#include <assert.h>
-#define STBI_ASSERT(x) assert(x)
-#endif
-
-#ifdef __cplusplus
-#define STBI_EXTERN extern "C"
-#else
-#define STBI_EXTERN extern
-#endif
-
-
-#ifndef _MSC_VER
-   #ifdef __cplusplus
-   #define stbi_inline inline
-   #else
-   #define stbi_inline
-   #endif
-#else
-   #define stbi_inline __forceinline
-#endif
-
-#ifndef STBI_NO_THREAD_LOCALS
-   #if defined(__cplusplus) &&  __cplusplus >= 201103L
-      #define STBI_THREAD_LOCAL       thread_local
-   #elif defined(__GNUC__) && __GNUC__ < 5
-      #define STBI_THREAD_LOCAL       __thread
-   #elif defined(_MSC_VER)
-      #define STBI_THREAD_LOCAL       __declspec(thread)
-   #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__)
-      #define STBI_THREAD_LOCAL       _Thread_local
-   #endif
-
-   #ifndef STBI_THREAD_LOCAL
-      #if defined(__GNUC__)
-        #define STBI_THREAD_LOCAL       __thread
-      #endif
-   #endif
-#endif
-
-#if defined(_MSC_VER) || defined(__SYMBIAN32__)
-typedef unsigned short stbi__uint16;
-typedef   signed short stbi__int16;
-typedef unsigned int   stbi__uint32;
-typedef   signed int   stbi__int32;
-#else
-#include <stdint.h>
-typedef uint16_t stbi__uint16;
-typedef int16_t  stbi__int16;
-typedef uint32_t stbi__uint32;
-typedef int32_t  stbi__int32;
-#endif
-
-// should produce compiler error if size is wrong
-typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
-
-#ifdef _MSC_VER
-#define STBI_NOTUSED(v)  (void)(v)
-#else
-#define STBI_NOTUSED(v)  (void)sizeof(v)
-#endif
-
-#ifdef _MSC_VER
-#define STBI_HAS_LROTL
-#endif
-
-#ifdef STBI_HAS_LROTL
-   #define stbi_lrot(x,y)  _lrotl(x,y)
-#else
-   #define stbi_lrot(x,y)  (((x) << (y)) | ((x) >> (-(y) & 31)))
-#endif
-
-#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
-// ok
-#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
-// ok
-#else
-#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
-#endif
-
-#ifndef STBI_MALLOC
-#define STBI_MALLOC(sz)           malloc(sz)
-#define STBI_REALLOC(p,newsz)     realloc(p,newsz)
-#define STBI_FREE(p)              free(p)
-#endif
-
-#ifndef STBI_REALLOC_SIZED
-#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz)
-#endif
-
-// x86/x64 detection
-#if defined(__x86_64__) || defined(_M_X64)
-#define STBI__X64_TARGET
-#elif defined(__i386) || defined(_M_IX86)
-#define STBI__X86_TARGET
-#endif
-
-#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
-// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
-// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
-// but previous attempts to provide the SSE2 functions with runtime
-// detection caused numerous issues. The way architecture extensions are
-// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
-// New behavior: if compiled with -msse2, we use SSE2 without any
-// detection; if not, we don't use it at all.
-#define STBI_NO_SIMD
-#endif
-
-#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
-// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET
-//
-// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
-// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
-// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
-// simultaneously enabling "-mstackrealign".
-//
-// See https://github.com/nothings/stb/issues/81 for more information.
-//
-// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
-// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2.
-#define STBI_NO_SIMD
-#endif
-
-#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
-#define STBI_SSE2
-#include <emmintrin.h>
-
-#ifdef _MSC_VER
-
-#if _MSC_VER >= 1400  // not VC6
-#include <intrin.h> // __cpuid
-static int stbi__cpuid3(void)
-{
-   int info[4];
-   __cpuid(info,1);
-   return info[3];
-}
-#else
-static int stbi__cpuid3(void)
-{
-   int res;
-   __asm {
-      mov  eax,1
-      cpuid
-      mov  res,edx
-   }
-   return res;
-}
-#endif
-
-#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
-
-#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
-static int stbi__sse2_available(void)
-{
-   int info3 = stbi__cpuid3();
-   return ((info3 >> 26) & 1) != 0;
-}
-#endif
-
-#else // assume GCC-style if not VC++
-#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
-
-#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
-static int stbi__sse2_available(void)
-{
-   // If we're even attempting to compile this on GCC/Clang, that means
-   // -msse2 is on, which means the compiler is allowed to use SSE2
-   // instructions at will, and so are we.
-   return 1;
-}
-#endif
-
-#endif
-#endif
-
-// ARM NEON
-#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
-#undef STBI_NEON
-#endif
-
-#ifdef STBI_NEON
-#include <arm_neon.h>
-#ifdef _MSC_VER
-#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
-#else
-#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
-#endif
-#endif
-
-#ifndef STBI_SIMD_ALIGN
-#define STBI_SIMD_ALIGN(type, name) type name
-#endif
-
-#ifndef STBI_MAX_DIMENSIONS
-#define STBI_MAX_DIMENSIONS (1 << 24)
-#endif
-
-///////////////////////////////////////////////
-//
-//  stbi__context struct and start_xxx functions
-
-// stbi__context structure is our basic context used by all images, so it
-// contains all the IO context, plus some basic image information
-typedef struct
-{
-   stbi__uint32 img_x, img_y;
-   int img_n, img_out_n;
-
-   stbi_io_callbacks io;
-   void *io_user_data;
-
-   int read_from_callbacks;
-   int buflen;
-   stbi_uc buffer_start[128];
-   int callback_already_read;
-
-   stbi_uc *img_buffer, *img_buffer_end;
-   stbi_uc *img_buffer_original, *img_buffer_original_end;
-} stbi__context;
-
-
-static void stbi__refill_buffer(stbi__context *s);
-
-// initialize a memory-decode context
-static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len)
-{
-   s->io.read = NULL;
-   s->read_from_callbacks = 0;
-   s->callback_already_read = 0;
-   s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;
-   s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len;
-}
-
-// initialize a callback-based context
-static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user)
-{
-   s->io = *c;
-   s->io_user_data = user;
-   s->buflen = sizeof(s->buffer_start);
-   s->read_from_callbacks = 1;
-   s->callback_already_read = 0;
-   s->img_buffer = s->img_buffer_original = s->buffer_start;
-   stbi__refill_buffer(s);
-   s->img_buffer_original_end = s->img_buffer_end;
-}
-
-#ifndef STBI_NO_STDIO
-
-static int stbi__stdio_read(void *user, char *data, int size)
-{
-   return (int) fread(data,1,size,(FILE*) user);
-}
-
-static void stbi__stdio_skip(void *user, int n)
-{
-   int ch;
-   fseek((FILE*) user, n, SEEK_CUR);
-   ch = fgetc((FILE*) user);  /* have to read a byte to reset feof()'s flag */
-   if (ch != EOF) {
-      ungetc(ch, (FILE *) user);  /* push byte back onto stream if valid. */
-   }
-}
-
-static int stbi__stdio_eof(void *user)
-{
-   return feof((FILE*) user) || ferror((FILE *) user);
-}
-
-static stbi_io_callbacks stbi__stdio_callbacks =
-{
-   stbi__stdio_read,
-   stbi__stdio_skip,
-   stbi__stdio_eof,
-};
-
-static void stbi__start_file(stbi__context *s, FILE *f)
-{
-   stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f);
-}
-
-//static void stop_file(stbi__context *s) { }
-
-#endif // !STBI_NO_STDIO
-
-static void stbi__rewind(stbi__context *s)
-{
-   // conceptually rewind SHOULD rewind to the beginning of the stream,
-   // but we just rewind to the beginning of the initial buffer, because
-   // we only use it after doing 'test', which only ever looks at at most 92 bytes
-   s->img_buffer = s->img_buffer_original;
-   s->img_buffer_end = s->img_buffer_original_end;
-}
-
-enum
-{
-   STBI_ORDER_RGB,
-   STBI_ORDER_BGR
-};
-
-typedef struct
-{
-   int bits_per_channel;
-   int num_channels;
-   int channel_order;
-} stbi__result_info;
-
-#ifndef STBI_NO_JPEG
-static int      stbi__jpeg_test(stbi__context *s);
-static void    *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PNG
-static int      stbi__png_test(stbi__context *s);
-static void    *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__png_info(stbi__context *s, int *x, int *y, int *comp);
-static int      stbi__png_is16(stbi__context *s);
-#endif
-
-#ifndef STBI_NO_BMP
-static int      stbi__bmp_test(stbi__context *s);
-static void    *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_TGA
-static int      stbi__tga_test(stbi__context *s);
-static void    *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__tga_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PSD
-static int      stbi__psd_test(stbi__context *s);
-static void    *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc);
-static int      stbi__psd_info(stbi__context *s, int *x, int *y, int *comp);
-static int      stbi__psd_is16(stbi__context *s);
-#endif
-
-#ifndef STBI_NO_HDR
-static int      stbi__hdr_test(stbi__context *s);
-static float   *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PIC
-static int      stbi__pic_test(stbi__context *s);
-static void    *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__pic_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_GIF
-static int      stbi__gif_test(stbi__context *s);
-static void    *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static void    *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
-static int      stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PNM
-static int      stbi__pnm_test(stbi__context *s);
-static void    *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp);
-static int      stbi__pnm_is16(stbi__context *s);
-#endif
-
-static
-#ifdef STBI_THREAD_LOCAL
-STBI_THREAD_LOCAL
-#endif
-const char *stbi__g_failure_reason;
-
-STBIDEF const char *stbi_failure_reason(void)
-{
-   return stbi__g_failure_reason;
-}
-
-#ifndef STBI_NO_FAILURE_STRINGS
-static int stbi__err(const char *str)
-{
-   stbi__g_failure_reason = str;
-   return 0;
-}
-#endif
-
-static void *stbi__malloc(size_t size)
-{
-    return STBI_MALLOC(size);
-}
-
-// stb_image uses ints pervasively, including for offset calculations.
-// therefore the largest decoded image size we can support with the
-// current code, even on 64-bit targets, is INT_MAX. this is not a
-// significant limitation for the intended use case.
-//
-// we do, however, need to make sure our size calculations don't
-// overflow. hence a few helper functions for size calculations that
-// multiply integers together, making sure that they're non-negative
-// and no overflow occurs.
-
-// return 1 if the sum is valid, 0 on overflow.
-// negative terms are considered invalid.
-static int stbi__addsizes_valid(int a, int b)
-{
-   if (b < 0) return 0;
-   // now 0 <= b <= INT_MAX, hence also
-   // 0 <= INT_MAX - b <= INTMAX.
-   // And "a + b <= INT_MAX" (which might overflow) is the
-   // same as a <= INT_MAX - b (no overflow)
-   return a <= INT_MAX - b;
-}
-
-// returns 1 if the product is valid, 0 on overflow.
-// negative factors are considered invalid.
-static int stbi__mul2sizes_valid(int a, int b)
-{
-   if (a < 0 || b < 0) return 0;
-   if (b == 0) return 1; // mul-by-0 is always safe
-   // portable way to check for no overflows in a*b
-   return a <= INT_MAX/b;
-}
-
-#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
-// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
-static int stbi__mad2sizes_valid(int a, int b, int add)
-{
-   return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add);
-}
-#endif
-
-// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
-static int stbi__mad3sizes_valid(int a, int b, int c, int add)
-{
-   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
-      stbi__addsizes_valid(a*b*c, add);
-}
-
-// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
-static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
-{
-   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
-      stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add);
-}
-#endif
-
-#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
-// mallocs with size overflow checking
-static void *stbi__malloc_mad2(int a, int b, int add)
-{
-   if (!stbi__mad2sizes_valid(a, b, add)) return NULL;
-   return stbi__malloc(a*b + add);
-}
-#endif
-
-static void *stbi__malloc_mad3(int a, int b, int c, int add)
-{
-   if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL;
-   return stbi__malloc(a*b*c + add);
-}
-
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
-static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
-{
-   if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
-   return stbi__malloc(a*b*c*d + add);
-}
-#endif
-
-// returns 1 if the sum of two signed ints is valid (between -2^31 and 2^31-1 inclusive), 0 on overflow.
-static int stbi__addints_valid(int a, int b)
-{
-   if ((a >= 0) != (b >= 0)) return 1; // a and b have different signs, so no overflow
-   if (a < 0 && b < 0) return a >= INT_MIN - b; // same as a + b >= INT_MIN; INT_MIN - b cannot overflow since b < 0.
-   return a <= INT_MAX - b;
-}
-
-// returns 1 if the product of two ints fits in a signed short, 0 on overflow.
-static int stbi__mul2shorts_valid(int a, int b)
-{
-   if (b == 0 || b == -1) return 1; // multiplication by 0 is always 0; check for -1 so SHRT_MIN/b doesn't overflow
-   if ((a >= 0) == (b >= 0)) return a <= SHRT_MAX/b; // product is positive, so similar to mul2sizes_valid
-   if (b < 0) return a <= SHRT_MIN / b; // same as a * b >= SHRT_MIN
-   return a >= SHRT_MIN / b;
-}
-
-// stbi__err - error
-// stbi__errpf - error returning pointer to float
-// stbi__errpuc - error returning pointer to unsigned char
-
-#ifdef STBI_NO_FAILURE_STRINGS
-   #define stbi__err(x,y)  0
-#elif defined(STBI_FAILURE_USERMSG)
-   #define stbi__err(x,y)  stbi__err(y)
-#else
-   #define stbi__err(x,y)  stbi__err(x)
-#endif
-
-#define stbi__errpf(x,y)   ((float *)(size_t) (stbi__err(x,y)?NULL:NULL))
-#define stbi__errpuc(x,y)  ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL))
-
-STBIDEF void stbi_image_free(void *retval_from_stbi_load)
-{
-   STBI_FREE(retval_from_stbi_load);
-}
-
-#ifndef STBI_NO_LINEAR
-static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp);
-#endif
-
-#ifndef STBI_NO_HDR
-static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp);
-#endif
-
-static int stbi__vertically_flip_on_load_global = 0;
-
-STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
-{
-   stbi__vertically_flip_on_load_global = flag_true_if_should_flip;
-}
-
-#ifndef STBI_THREAD_LOCAL
-#define stbi__vertically_flip_on_load  stbi__vertically_flip_on_load_global
-#else
-static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set;
-
-STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip)
-{
-   stbi__vertically_flip_on_load_local = flag_true_if_should_flip;
-   stbi__vertically_flip_on_load_set = 1;
-}
-
-#define stbi__vertically_flip_on_load  (stbi__vertically_flip_on_load_set       \
-                                         ? stbi__vertically_flip_on_load_local  \
-                                         : stbi__vertically_flip_on_load_global)
-#endif // STBI_THREAD_LOCAL
-
-static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
-{
-   memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields
-   ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed
-   ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
-   ri->num_channels = 0;
-
-   // test the formats with a very explicit header first (at least a FOURCC
-   // or distinctive magic number first)
-   #ifndef STBI_NO_PNG
-   if (stbi__png_test(s))  return stbi__png_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_BMP
-   if (stbi__bmp_test(s))  return stbi__bmp_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_GIF
-   if (stbi__gif_test(s))  return stbi__gif_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_PSD
-   if (stbi__psd_test(s))  return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc);
-   #else
-   STBI_NOTUSED(bpc);
-   #endif
-   #ifndef STBI_NO_PIC
-   if (stbi__pic_test(s))  return stbi__pic_load(s,x,y,comp,req_comp, ri);
-   #endif
-
-   // then the formats that can end up attempting to load with just 1 or 2
-   // bytes matching expectations; these are prone to false positives, so
-   // try them later
-   #ifndef STBI_NO_JPEG
-   if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_PNM
-   if (stbi__pnm_test(s))  return stbi__pnm_load(s,x,y,comp,req_comp, ri);
-   #endif
-
-   #ifndef STBI_NO_HDR
-   if (stbi__hdr_test(s)) {
-      float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri);
-      return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
-   }
-   #endif
-
-   #ifndef STBI_NO_TGA
-   // test tga last because it's a crappy test!
-   if (stbi__tga_test(s))
-      return stbi__tga_load(s,x,y,comp,req_comp, ri);
-   #endif
-
-   return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
-}
-
-static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels)
-{
-   int i;
-   int img_len = w * h * channels;
-   stbi_uc *reduced;
-
-   reduced = (stbi_uc *) stbi__malloc(img_len);
-   if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory");
-
-   for (i = 0; i < img_len; ++i)
-      reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling
-
-   STBI_FREE(orig);
-   return reduced;
-}
-
-static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels)
-{
-   int i;
-   int img_len = w * h * channels;
-   stbi__uint16 *enlarged;
-
-   enlarged = (stbi__uint16 *) stbi__malloc(img_len*2);
-   if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
-
-   for (i = 0; i < img_len; ++i)
-      enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
-
-   STBI_FREE(orig);
-   return enlarged;
-}
-
-static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel)
-{
-   int row;
-   size_t bytes_per_row = (size_t)w * bytes_per_pixel;
-   stbi_uc temp[2048];
-   stbi_uc *bytes = (stbi_uc *)image;
-
-   for (row = 0; row < (h>>1); row++) {
-      stbi_uc *row0 = bytes + row*bytes_per_row;
-      stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row;
-      // swap row0 with row1
-      size_t bytes_left = bytes_per_row;
-      while (bytes_left) {
-         size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
-         memcpy(temp, row0, bytes_copy);
-         memcpy(row0, row1, bytes_copy);
-         memcpy(row1, temp, bytes_copy);
-         row0 += bytes_copy;
-         row1 += bytes_copy;
-         bytes_left -= bytes_copy;
-      }
-   }
-}
-
-#ifndef STBI_NO_GIF
-static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel)
-{
-   int slice;
-   int slice_size = w * h * bytes_per_pixel;
-
-   stbi_uc *bytes = (stbi_uc *)image;
-   for (slice = 0; slice < z; ++slice) {
-      stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
-      bytes += slice_size;
-   }
-}
-#endif
-
-static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__result_info ri;
-   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
-
-   if (result == NULL)
-      return NULL;
-
-   // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
-   STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16);
-
-   if (ri.bits_per_channel != 8) {
-      result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
-      ri.bits_per_channel = 8;
-   }
-
-   // @TODO: move stbi__convert_format to here
-
-   if (stbi__vertically_flip_on_load) {
-      int channels = req_comp ? req_comp : *comp;
-      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
-   }
-
-   return (unsigned char *) result;
-}
-
-static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__result_info ri;
-   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
-
-   if (result == NULL)
-      return NULL;
-
-   // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
-   STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16);
-
-   if (ri.bits_per_channel != 16) {
-      result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
-      ri.bits_per_channel = 16;
-   }
-
-   // @TODO: move stbi__convert_format16 to here
-   // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision
-
-   if (stbi__vertically_flip_on_load) {
-      int channels = req_comp ? req_comp : *comp;
-      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
-   }
-
-   return (stbi__uint16 *) result;
-}
-
-#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
-static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp)
-{
-   if (stbi__vertically_flip_on_load && result != NULL) {
-      int channels = req_comp ? req_comp : *comp;
-      stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
-   }
-}
-#endif
-
-#ifndef STBI_NO_STDIO
-
-#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
-STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
-STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
-#endif
-
-#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
-STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
-{
-	return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
-}
-#endif
-
-static FILE *stbi__fopen(char const *filename, char const *mode)
-{
-   FILE *f;
-#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
-   wchar_t wMode[64];
-   wchar_t wFilename[1024];
-	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename)))
-      return 0;
-
-	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode)))
-      return 0;
-
-#if defined(_MSC_VER) && _MSC_VER >= 1400
-	if (0 != _wfopen_s(&f, wFilename, wMode))
-		f = 0;
-#else
-   f = _wfopen(wFilename, wMode);
-#endif
-
-#elif defined(_MSC_VER) && _MSC_VER >= 1400
-   if (0 != fopen_s(&f, filename, mode))
-      f=0;
-#else
-   f = fopen(filename, mode);
-#endif
-   return f;
-}
-
-
-STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
-   FILE *f = stbi__fopen(filename, "rb");
-   unsigned char *result;
-   if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
-   result = stbi_load_from_file(f,x,y,comp,req_comp);
-   fclose(f);
-   return result;
-}
-
-STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
-   unsigned char *result;
-   stbi__context s;
-   stbi__start_file(&s,f);
-   result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
-   if (result) {
-      // need to 'unget' all the characters in the IO buffer
-      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
-   }
-   return result;
-}
-
-STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__uint16 *result;
-   stbi__context s;
-   stbi__start_file(&s,f);
-   result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp);
-   if (result) {
-      // need to 'unget' all the characters in the IO buffer
-      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
-   }
-   return result;
-}
-
-STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
-   FILE *f = stbi__fopen(filename, "rb");
-   stbi__uint16 *result;
-   if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file");
-   result = stbi_load_from_file_16(f,x,y,comp,req_comp);
-   fclose(f);
-   return result;
-}
-
-
-#endif //!STBI_NO_STDIO
-
-STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
-}
-
-STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user);
-   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
-}
-
-STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
-}
-
-STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
-   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_GIF
-STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
-{
-   unsigned char *result;
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-
-   result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
-   if (stbi__vertically_flip_on_load) {
-      stbi__vertical_flip_slices( result, *x, *y, *z, *comp );
-   }
-
-   return result;
-}
-#endif
-
-#ifndef STBI_NO_LINEAR
-static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
-   unsigned char *data;
-   #ifndef STBI_NO_HDR
-   if (stbi__hdr_test(s)) {
-      stbi__result_info ri;
-      float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri);
-      if (hdr_data)
-         stbi__float_postprocess(hdr_data,x,y,comp,req_comp);
-      return hdr_data;
-   }
-   #endif
-   data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
-   if (data)
-      return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
-   return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
-}
-
-STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__loadf_main(&s,x,y,comp,req_comp);
-}
-
-STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
-   return stbi__loadf_main(&s,x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
-   float *result;
-   FILE *f = stbi__fopen(filename, "rb");
-   if (!f) return stbi__errpf("can't fopen", "Unable to open file");
-   result = stbi_loadf_from_file(f,x,y,comp,req_comp);
-   fclose(f);
-   return result;
-}
-
-STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_file(&s,f);
-   return stbi__loadf_main(&s,x,y,comp,req_comp);
-}
-#endif // !STBI_NO_STDIO
-
-#endif // !STBI_NO_LINEAR
-
-// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
-// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
-// reports false!
-
-STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
-{
-   #ifndef STBI_NO_HDR
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__hdr_test(&s);
-   #else
-   STBI_NOTUSED(buffer);
-   STBI_NOTUSED(len);
-   return 0;
-   #endif
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int      stbi_is_hdr          (char const *filename)
-{
-   FILE *f = stbi__fopen(filename, "rb");
-   int result=0;
-   if (f) {
-      result = stbi_is_hdr_from_file(f);
-      fclose(f);
-   }
-   return result;
-}
-
-STBIDEF int stbi_is_hdr_from_file(FILE *f)
-{
-   #ifndef STBI_NO_HDR
-   long pos = ftell(f);
-   int res;
-   stbi__context s;
-   stbi__start_file(&s,f);
-   res = stbi__hdr_test(&s);
-   fseek(f, pos, SEEK_SET);
-   return res;
-   #else
-   STBI_NOTUSED(f);
-   return 0;
-   #endif
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
-{
-   #ifndef STBI_NO_HDR
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
-   return stbi__hdr_test(&s);
-   #else
-   STBI_NOTUSED(clbk);
-   STBI_NOTUSED(user);
-   return 0;
-   #endif
-}
-
-#ifndef STBI_NO_LINEAR
-static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f;
-
-STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
-STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
-#endif
-
-static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f;
-
-STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
-STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Common code used by all image loaders
-//
-
-enum
-{
-   STBI__SCAN_load=0,
-   STBI__SCAN_type,
-   STBI__SCAN_header
-};
-
-static void stbi__refill_buffer(stbi__context *s)
-{
-   int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen);
-   s->callback_already_read += (int) (s->img_buffer - s->img_buffer_original);
-   if (n == 0) {
-      // at end of file, treat same as if from memory, but need to handle case
-      // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
-      s->read_from_callbacks = 0;
-      s->img_buffer = s->buffer_start;
-      s->img_buffer_end = s->buffer_start+1;
-      *s->img_buffer = 0;
-   } else {
-      s->img_buffer = s->buffer_start;
-      s->img_buffer_end = s->buffer_start + n;
-   }
-}
-
-stbi_inline static stbi_uc stbi__get8(stbi__context *s)
-{
-   if (s->img_buffer < s->img_buffer_end)
-      return *s->img_buffer++;
-   if (s->read_from_callbacks) {
-      stbi__refill_buffer(s);
-      return *s->img_buffer++;
-   }
-   return 0;
-}
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-stbi_inline static int stbi__at_eof(stbi__context *s)
-{
-   if (s->io.read) {
-      if (!(s->io.eof)(s->io_user_data)) return 0;
-      // if feof() is true, check if buffer = end
-      // special case: we've only got the special 0 character at the end
-      if (s->read_from_callbacks == 0) return 1;
-   }
-
-   return s->img_buffer >= s->img_buffer_end;
-}
-#endif
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC)
-// nothing
-#else
-static void stbi__skip(stbi__context *s, int n)
-{
-   if (n == 0) return;  // already there!
-   if (n < 0) {
-      s->img_buffer = s->img_buffer_end;
-      return;
-   }
-   if (s->io.read) {
-      int blen = (int) (s->img_buffer_end - s->img_buffer);
-      if (blen < n) {
-         s->img_buffer = s->img_buffer_end;
-         (s->io.skip)(s->io_user_data, n - blen);
-         return;
-      }
-   }
-   s->img_buffer += n;
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM)
-// nothing
-#else
-static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n)
-{
-   if (s->io.read) {
-      int blen = (int) (s->img_buffer_end - s->img_buffer);
-      if (blen < n) {
-         int res, count;
-
-         memcpy(buffer, s->img_buffer, blen);
-
-         count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen);
-         res = (count == (n-blen));
-         s->img_buffer = s->img_buffer_end;
-         return res;
-      }
-   }
-
-   if (s->img_buffer+n <= s->img_buffer_end) {
-      memcpy(buffer, s->img_buffer, n);
-      s->img_buffer += n;
-      return 1;
-   } else
-      return 0;
-}
-#endif
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
-// nothing
-#else
-static int stbi__get16be(stbi__context *s)
-{
-   int z = stbi__get8(s);
-   return (z << 8) + stbi__get8(s);
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
-// nothing
-#else
-static stbi__uint32 stbi__get32be(stbi__context *s)
-{
-   stbi__uint32 z = stbi__get16be(s);
-   return (z << 16) + stbi__get16be(s);
-}
-#endif
-
-#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
-// nothing
-#else
-static int stbi__get16le(stbi__context *s)
-{
-   int z = stbi__get8(s);
-   return z + (stbi__get8(s) << 8);
-}
-#endif
-
-#ifndef STBI_NO_BMP
-static stbi__uint32 stbi__get32le(stbi__context *s)
-{
-   stbi__uint32 z = stbi__get16le(s);
-   z += (stbi__uint32)stbi__get16le(s) << 16;
-   return z;
-}
-#endif
-
-#define STBI__BYTECAST(x)  ((stbi_uc) ((x) & 255))  // truncate int to byte without warnings
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-//////////////////////////////////////////////////////////////////////////////
-//
-//  generic converter from built-in img_n to req_comp
-//    individual types do this automatically as much as possible (e.g. jpeg
-//    does all cases internally since it needs to colorspace convert anyway,
-//    and it never has alpha, so very few cases ). png can automatically
-//    interleave an alpha=255 channel, but falls back to this for other cases
-//
-//  assume data buffer is malloced, so malloc a new one and free that one
-//  only failure mode is malloc failing
-
-static stbi_uc stbi__compute_y(int r, int g, int b)
-{
-   return (stbi_uc) (((r*77) + (g*150) +  (29*b)) >> 8);
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y)
-{
-   int i,j;
-   unsigned char *good;
-
-   if (req_comp == img_n) return data;
-   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
-
-   good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0);
-   if (good == NULL) {
-      STBI_FREE(data);
-      return stbi__errpuc("outofmem", "Out of memory");
-   }
-
-   for (j=0; j < (int) y; ++j) {
-      unsigned char *src  = data + j * x * img_n   ;
-      unsigned char *dest = good + j * x * req_comp;
-
-      #define STBI__COMBO(a,b)  ((a)*8+(b))
-      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
-      // convert source image with img_n components to one with req_comp components;
-      // avoid switch per pixel, so use switch per scanline and massive macros
-      switch (STBI__COMBO(img_n, req_comp)) {
-         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255;                                     } break;
-         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
-         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255;                     } break;
-         STBI__CASE(2,1) { dest[0]=src[0];                                                  } break;
-         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
-         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                  } break;
-         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255;        } break;
-         STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255;    } break;
-         STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break;
-         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                    } break;
-         default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return stbi__errpuc("unsupported", "Unsupported format conversion");
-      }
-      #undef STBI__CASE
-   }
-
-   STBI_FREE(data);
-   return good;
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
-// nothing
-#else
-static stbi__uint16 stbi__compute_y_16(int r, int g, int b)
-{
-   return (stbi__uint16) (((r*77) + (g*150) +  (29*b)) >> 8);
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
-// nothing
-#else
-static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y)
-{
-   int i,j;
-   stbi__uint16 *good;
-
-   if (req_comp == img_n) return data;
-   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
-
-   good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2);
-   if (good == NULL) {
-      STBI_FREE(data);
-      return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
-   }
-
-   for (j=0; j < (int) y; ++j) {
-      stbi__uint16 *src  = data + j * x * img_n   ;
-      stbi__uint16 *dest = good + j * x * req_comp;
-
-      #define STBI__COMBO(a,b)  ((a)*8+(b))
-      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
-      // convert source image with img_n components to one with req_comp components;
-      // avoid switch per pixel, so use switch per scanline and massive macros
-      switch (STBI__COMBO(img_n, req_comp)) {
-         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff;                                     } break;
-         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
-         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff;                     } break;
-         STBI__CASE(2,1) { dest[0]=src[0];                                                     } break;
-         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
-         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                     } break;
-         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff;        } break;
-         STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break;
-         STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break;
-         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                       } break;
-         default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion");
-      }
-      #undef STBI__CASE
-   }
-
-   STBI_FREE(data);
-   return good;
-}
-#endif
-
-#ifndef STBI_NO_LINEAR
-static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp)
-{
-   int i,k,n;
-   float *output;
-   if (!data) return NULL;
-   output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
-   if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); }
-   // compute number of non-alpha components
-   if (comp & 1) n = comp; else n = comp-1;
-   for (i=0; i < x*y; ++i) {
-      for (k=0; k < n; ++k) {
-         output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
-      }
-   }
-   if (n < comp) {
-      for (i=0; i < x*y; ++i) {
-         output[i*comp + n] = data[i*comp + n]/255.0f;
-      }
-   }
-   STBI_FREE(data);
-   return output;
-}
-#endif
-
-#ifndef STBI_NO_HDR
-#define stbi__float2int(x)   ((int) (x))
-static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp)
-{
-   int i,k,n;
-   stbi_uc *output;
-   if (!data) return NULL;
-   output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0);
-   if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); }
-   // compute number of non-alpha components
-   if (comp & 1) n = comp; else n = comp-1;
-   for (i=0; i < x*y; ++i) {
-      for (k=0; k < n; ++k) {
-         float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
-         if (z < 0) z = 0;
-         if (z > 255) z = 255;
-         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
-      }
-      if (k < comp) {
-         float z = data[i*comp+k] * 255 + 0.5f;
-         if (z < 0) z = 0;
-         if (z > 255) z = 255;
-         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
-      }
-   }
-   STBI_FREE(data);
-   return output;
-}
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-//  "baseline" JPEG/JFIF decoder
-//
-//    simple implementation
-//      - doesn't support delayed output of y-dimension
-//      - simple interface (only one output format: 8-bit interleaved RGB)
-//      - doesn't try to recover corrupt jpegs
-//      - doesn't allow partial loading, loading multiple at once
-//      - still fast on x86 (copying globals into locals doesn't help x86)
-//      - allocates lots of intermediate memory (full size of all components)
-//        - non-interleaved case requires this anyway
-//        - allows good upsampling (see next)
-//    high-quality
-//      - upsampled channels are bilinearly interpolated, even across blocks
-//      - quality integer IDCT derived from IJG's 'slow'
-//    performance
-//      - fast huffman; reasonable integer IDCT
-//      - some SIMD kernels for common paths on targets with SSE2/NEON
-//      - uses a lot of intermediate memory, could cache poorly
-
-#ifndef STBI_NO_JPEG
-
-// huffman decoding acceleration
-#define FAST_BITS   9  // larger handles more cases; smaller stomps less cache
-
-typedef struct
-{
-   stbi_uc  fast[1 << FAST_BITS];
-   // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
-   stbi__uint16 code[256];
-   stbi_uc  values[256];
-   stbi_uc  size[257];
-   unsigned int maxcode[18];
-   int    delta[17];   // old 'firstsymbol' - old 'firstcode'
-} stbi__huffman;
-
-typedef struct
-{
-   stbi__context *s;
-   stbi__huffman huff_dc[4];
-   stbi__huffman huff_ac[4];
-   stbi__uint16 dequant[4][64];
-   stbi__int16 fast_ac[4][1 << FAST_BITS];
-
-// sizes for components, interleaved MCUs
-   int img_h_max, img_v_max;
-   int img_mcu_x, img_mcu_y;
-   int img_mcu_w, img_mcu_h;
-
-// definition of jpeg image component
-   struct
-   {
-      int id;
-      int h,v;
-      int tq;
-      int hd,ha;
-      int dc_pred;
-
-      int x,y,w2,h2;
-      stbi_uc *data;
-      void *raw_data, *raw_coeff;
-      stbi_uc *linebuf;
-      short   *coeff;   // progressive only
-      int      coeff_w, coeff_h; // number of 8x8 coefficient blocks
-   } img_comp[4];
-
-   stbi__uint32   code_buffer; // jpeg entropy-coded buffer
-   int            code_bits;   // number of valid bits
-   unsigned char  marker;      // marker seen while filling entropy buffer
-   int            nomore;      // flag if we saw a marker so must stop
-
-   int            progressive;
-   int            spec_start;
-   int            spec_end;
-   int            succ_high;
-   int            succ_low;
-   int            eob_run;
-   int            jfif;
-   int            app14_color_transform; // Adobe APP14 tag
-   int            rgb;
-
-   int scan_n, order[4];
-   int restart_interval, todo;
-
-// kernels
-   void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]);
-   void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step);
-   stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs);
-} stbi__jpeg;
-
-static int stbi__build_huffman(stbi__huffman *h, int *count)
-{
-   int i,j,k=0;
-   unsigned int code;
-   // build size list for each symbol (from JPEG spec)
-   for (i=0; i < 16; ++i) {
-      for (j=0; j < count[i]; ++j) {
-         h->size[k++] = (stbi_uc) (i+1);
-         if(k >= 257) return stbi__err("bad size list","Corrupt JPEG");
-      }
-   }
-   h->size[k] = 0;
-
-   // compute actual symbols (from jpeg spec)
-   code = 0;
-   k = 0;
-   for(j=1; j <= 16; ++j) {
-      // compute delta to add to code to compute symbol id
-      h->delta[j] = k - code;
-      if (h->size[k] == j) {
-         while (h->size[k] == j)
-            h->code[k++] = (stbi__uint16) (code++);
-         if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG");
-      }
-      // compute largest code + 1 for this size, preshifted as needed later
-      h->maxcode[j] = code << (16-j);
-      code <<= 1;
-   }
-   h->maxcode[j] = 0xffffffff;
-
-   // build non-spec acceleration table; 255 is flag for not-accelerated
-   memset(h->fast, 255, 1 << FAST_BITS);
-   for (i=0; i < k; ++i) {
-      int s = h->size[i];
-      if (s <= FAST_BITS) {
-         int c = h->code[i] << (FAST_BITS-s);
-         int m = 1 << (FAST_BITS-s);
-         for (j=0; j < m; ++j) {
-            h->fast[c+j] = (stbi_uc) i;
-         }
-      }
-   }
-   return 1;
-}
-
-// build a table that decodes both magnitude and value of small ACs in
-// one go.
-static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h)
-{
-   int i;
-   for (i=0; i < (1 << FAST_BITS); ++i) {
-      stbi_uc fast = h->fast[i];
-      fast_ac[i] = 0;
-      if (fast < 255) {
-         int rs = h->values[fast];
-         int run = (rs >> 4) & 15;
-         int magbits = rs & 15;
-         int len = h->size[fast];
-
-         if (magbits && len + magbits <= FAST_BITS) {
-            // magnitude code followed by receive_extend code
-            int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
-            int m = 1 << (magbits - 1);
-            if (k < m) k += (~0U << magbits) + 1;
-            // if the result is small enough, we can fit it in fast_ac table
-            if (k >= -128 && k <= 127)
-               fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits));
-         }
-      }
-   }
-}
-
-static void stbi__grow_buffer_unsafe(stbi__jpeg *j)
-{
-   do {
-      unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
-      if (b == 0xff) {
-         int c = stbi__get8(j->s);
-         while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes
-         if (c != 0) {
-            j->marker = (unsigned char) c;
-            j->nomore = 1;
-            return;
-         }
-      }
-      j->code_buffer |= b << (24 - j->code_bits);
-      j->code_bits += 8;
-   } while (j->code_bits <= 24);
-}
-
-// (1 << n) - 1
-static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
-
-// decode a jpeg huffman value from the bitstream
-stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h)
-{
-   unsigned int temp;
-   int c,k;
-
-   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-
-   // look at the top FAST_BITS and determine what symbol ID it is,
-   // if the code is <= FAST_BITS
-   c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
-   k = h->fast[c];
-   if (k < 255) {
-      int s = h->size[k];
-      if (s > j->code_bits)
-         return -1;
-      j->code_buffer <<= s;
-      j->code_bits -= s;
-      return h->values[k];
-   }
-
-   // naive test is to shift the code_buffer down so k bits are
-   // valid, then test against maxcode. To speed this up, we've
-   // preshifted maxcode left so that it has (16-k) 0s at the
-   // end; in other words, regardless of the number of bits, it
-   // wants to be compared against something shifted to have 16;
-   // that way we don't need to shift inside the loop.
-   temp = j->code_buffer >> 16;
-   for (k=FAST_BITS+1 ; ; ++k)
-      if (temp < h->maxcode[k])
-         break;
-   if (k == 17) {
-      // error! code not found
-      j->code_bits -= 16;
-      return -1;
-   }
-
-   if (k > j->code_bits)
-      return -1;
-
-   // convert the huffman code to the symbol id
-   c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
-   if(c < 0 || c >= 256) // symbol id out of bounds!
-       return -1;
-   STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
-
-   // convert the id to a symbol
-   j->code_bits -= k;
-   j->code_buffer <<= k;
-   return h->values[c];
-}
-
-// bias[n] = (-1<<n) + 1
-static const int stbi__jbias[16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767};
-
-// combined JPEG 'receive' and JPEG 'extend', since baseline
-// always extends everything it receives.
-stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
-{
-   unsigned int k;
-   int sgn;
-   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
-   if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing
-
-   sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative)
-   k = stbi_lrot(j->code_buffer, n);
-   j->code_buffer = k & ~stbi__bmask[n];
-   k &= stbi__bmask[n];
-   j->code_bits -= n;
-   return k + (stbi__jbias[n] & (sgn - 1));
-}
-
-// get some unsigned bits
-stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n)
-{
-   unsigned int k;
-   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
-   if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing
-   k = stbi_lrot(j->code_buffer, n);
-   j->code_buffer = k & ~stbi__bmask[n];
-   k &= stbi__bmask[n];
-   j->code_bits -= n;
-   return k;
-}
-
-stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j)
-{
-   unsigned int k;
-   if (j->code_bits < 1) stbi__grow_buffer_unsafe(j);
-   if (j->code_bits < 1) return 0; // ran out of bits from stream, return 0s intead of continuing
-   k = j->code_buffer;
-   j->code_buffer <<= 1;
-   --j->code_bits;
-   return k & 0x80000000;
-}
-
-// given a value that's at position X in the zigzag stream,
-// where does it appear in the 8x8 matrix coded as row-major?
-static const stbi_uc stbi__jpeg_dezigzag[64+15] =
-{
-    0,  1,  8, 16,  9,  2,  3, 10,
-   17, 24, 32, 25, 18, 11,  4,  5,
-   12, 19, 26, 33, 40, 48, 41, 34,
-   27, 20, 13,  6,  7, 14, 21, 28,
-   35, 42, 49, 56, 57, 50, 43, 36,
-   29, 22, 15, 23, 30, 37, 44, 51,
-   58, 59, 52, 45, 38, 31, 39, 46,
-   53, 60, 61, 54, 47, 55, 62, 63,
-   // let corrupt input sample past end
-   63, 63, 63, 63, 63, 63, 63, 63,
-   63, 63, 63, 63, 63, 63, 63
-};
-
-// decode one 64-entry block--
-static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant)
-{
-   int diff,dc,k;
-   int t;
-
-   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-   t = stbi__jpeg_huff_decode(j, hdc);
-   if (t < 0 || t > 15) return stbi__err("bad huffman code","Corrupt JPEG");
-
-   // 0 all the ac values now so we can do it 32-bits at a time
-   memset(data,0,64*sizeof(data[0]));
-
-   diff = t ? stbi__extend_receive(j, t) : 0;
-   if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta","Corrupt JPEG");
-   dc = j->img_comp[b].dc_pred + diff;
-   j->img_comp[b].dc_pred = dc;
-   if (!stbi__mul2shorts_valid(dc, dequant[0])) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-   data[0] = (short) (dc * dequant[0]);
-
-   // decode AC components, see JPEG spec
-   k = 1;
-   do {
-      unsigned int zig;
-      int c,r,s;
-      if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-      c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
-      r = fac[c];
-      if (r) { // fast-AC path
-         k += (r >> 4) & 15; // run
-         s = r & 15; // combined length
-         if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available");
-         j->code_buffer <<= s;
-         j->code_bits -= s;
-         // decode into unzigzag'd location
-         zig = stbi__jpeg_dezigzag[k++];
-         data[zig] = (short) ((r >> 8) * dequant[zig]);
-      } else {
-         int rs = stbi__jpeg_huff_decode(j, hac);
-         if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
-         s = rs & 15;
-         r = rs >> 4;
-         if (s == 0) {
-            if (rs != 0xf0) break; // end block
-            k += 16;
-         } else {
-            k += r;
-            // decode into unzigzag'd location
-            zig = stbi__jpeg_dezigzag[k++];
-            data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]);
-         }
-      }
-   } while (k < 64);
-   return 1;
-}
-
-static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b)
-{
-   int diff,dc;
-   int t;
-   if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-
-   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-
-   if (j->succ_high == 0) {
-      // first scan for DC coefficient, must be first
-      memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
-      t = stbi__jpeg_huff_decode(j, hdc);
-      if (t < 0 || t > 15) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-      diff = t ? stbi__extend_receive(j, t) : 0;
-
-      if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta", "Corrupt JPEG");
-      dc = j->img_comp[b].dc_pred + diff;
-      j->img_comp[b].dc_pred = dc;
-      if (!stbi__mul2shorts_valid(dc, 1 << j->succ_low)) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-      data[0] = (short) (dc * (1 << j->succ_low));
-   } else {
-      // refinement scan for DC coefficient
-      if (stbi__jpeg_get_bit(j))
-         data[0] += (short) (1 << j->succ_low);
-   }
-   return 1;
-}
-
-// @OPTIMIZE: store non-zigzagged during the decode passes,
-// and only de-zigzag when dequantizing
-static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac)
-{
-   int k;
-   if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-
-   if (j->succ_high == 0) {
-      int shift = j->succ_low;
-
-      if (j->eob_run) {
-         --j->eob_run;
-         return 1;
-      }
-
-      k = j->spec_start;
-      do {
-         unsigned int zig;
-         int c,r,s;
-         if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-         c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
-         r = fac[c];
-         if (r) { // fast-AC path
-            k += (r >> 4) & 15; // run
-            s = r & 15; // combined length
-            if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available");
-            j->code_buffer <<= s;
-            j->code_bits -= s;
-            zig = stbi__jpeg_dezigzag[k++];
-            data[zig] = (short) ((r >> 8) * (1 << shift));
-         } else {
-            int rs = stbi__jpeg_huff_decode(j, hac);
-            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
-            s = rs & 15;
-            r = rs >> 4;
-            if (s == 0) {
-               if (r < 15) {
-                  j->eob_run = (1 << r);
-                  if (r)
-                     j->eob_run += stbi__jpeg_get_bits(j, r);
-                  --j->eob_run;
-                  break;
-               }
-               k += 16;
-            } else {
-               k += r;
-               zig = stbi__jpeg_dezigzag[k++];
-               data[zig] = (short) (stbi__extend_receive(j,s) * (1 << shift));
-            }
-         }
-      } while (k <= j->spec_end);
-   } else {
-      // refinement scan for these AC coefficients
-
-      short bit = (short) (1 << j->succ_low);
-
-      if (j->eob_run) {
-         --j->eob_run;
-         for (k = j->spec_start; k <= j->spec_end; ++k) {
-            short *p = &data[stbi__jpeg_dezigzag[k]];
-            if (*p != 0)
-               if (stbi__jpeg_get_bit(j))
-                  if ((*p & bit)==0) {
-                     if (*p > 0)
-                        *p += bit;
-                     else
-                        *p -= bit;
-                  }
-         }
-      } else {
-         k = j->spec_start;
-         do {
-            int r,s;
-            int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh
-            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
-            s = rs & 15;
-            r = rs >> 4;
-            if (s == 0) {
-               if (r < 15) {
-                  j->eob_run = (1 << r) - 1;
-                  if (r)
-                     j->eob_run += stbi__jpeg_get_bits(j, r);
-                  r = 64; // force end of block
-               } else {
-                  // r=15 s=0 should write 16 0s, so we just do
-                  // a run of 15 0s and then write s (which is 0),
-                  // so we don't have to do anything special here
-               }
-            } else {
-               if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG");
-               // sign bit
-               if (stbi__jpeg_get_bit(j))
-                  s = bit;
-               else
-                  s = -bit;
-            }
-
-            // advance by r
-            while (k <= j->spec_end) {
-               short *p = &data[stbi__jpeg_dezigzag[k++]];
-               if (*p != 0) {
-                  if (stbi__jpeg_get_bit(j))
-                     if ((*p & bit)==0) {
-                        if (*p > 0)
-                           *p += bit;
-                        else
-                           *p -= bit;
-                     }
-               } else {
-                  if (r == 0) {
-                     *p = (short) s;
-                     break;
-                  }
-                  --r;
-               }
-            }
-         } while (k <= j->spec_end);
-      }
-   }
-   return 1;
-}
-
-// take a -128..127 value and stbi__clamp it and convert to 0..255
-stbi_inline static stbi_uc stbi__clamp(int x)
-{
-   // trick to use a single test to catch both cases
-   if ((unsigned int) x > 255) {
-      if (x < 0) return 0;
-      if (x > 255) return 255;
-   }
-   return (stbi_uc) x;
-}
-
-#define stbi__f2f(x)  ((int) (((x) * 4096 + 0.5)))
-#define stbi__fsh(x)  ((x) * 4096)
-
-// derived from jidctint -- DCT_ISLOW
-#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
-   int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
-   p2 = s2;                                    \
-   p3 = s6;                                    \
-   p1 = (p2+p3) * stbi__f2f(0.5411961f);       \
-   t2 = p1 + p3*stbi__f2f(-1.847759065f);      \
-   t3 = p1 + p2*stbi__f2f( 0.765366865f);      \
-   p2 = s0;                                    \
-   p3 = s4;                                    \
-   t0 = stbi__fsh(p2+p3);                      \
-   t1 = stbi__fsh(p2-p3);                      \
-   x0 = t0+t3;                                 \
-   x3 = t0-t3;                                 \
-   x1 = t1+t2;                                 \
-   x2 = t1-t2;                                 \
-   t0 = s7;                                    \
-   t1 = s5;                                    \
-   t2 = s3;                                    \
-   t3 = s1;                                    \
-   p3 = t0+t2;                                 \
-   p4 = t1+t3;                                 \
-   p1 = t0+t3;                                 \
-   p2 = t1+t2;                                 \
-   p5 = (p3+p4)*stbi__f2f( 1.175875602f);      \
-   t0 = t0*stbi__f2f( 0.298631336f);           \
-   t1 = t1*stbi__f2f( 2.053119869f);           \
-   t2 = t2*stbi__f2f( 3.072711026f);           \
-   t3 = t3*stbi__f2f( 1.501321110f);           \
-   p1 = p5 + p1*stbi__f2f(-0.899976223f);      \
-   p2 = p5 + p2*stbi__f2f(-2.562915447f);      \
-   p3 = p3*stbi__f2f(-1.961570560f);           \
-   p4 = p4*stbi__f2f(-0.390180644f);           \
-   t3 += p1+p4;                                \
-   t2 += p2+p3;                                \
-   t1 += p2+p4;                                \
-   t0 += p1+p3;
-
-static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64])
-{
-   int i,val[64],*v=val;
-   stbi_uc *o;
-   short *d = data;
-
-   // columns
-   for (i=0; i < 8; ++i,++d, ++v) {
-      // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
-      if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
-           && d[40]==0 && d[48]==0 && d[56]==0) {
-         //    no shortcut                 0     seconds
-         //    (1|2|3|4|5|6|7)==0          0     seconds
-         //    all separate               -0.047 seconds
-         //    1 && 2|3 && 4|5 && 6|7:    -0.047 seconds
-         int dcterm = d[0]*4;
-         v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
-      } else {
-         STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56])
-         // constants scaled things up by 1<<12; let's bring them back
-         // down, but keep 2 extra bits of precision
-         x0 += 512; x1 += 512; x2 += 512; x3 += 512;
-         v[ 0] = (x0+t3) >> 10;
-         v[56] = (x0-t3) >> 10;
-         v[ 8] = (x1+t2) >> 10;
-         v[48] = (x1-t2) >> 10;
-         v[16] = (x2+t1) >> 10;
-         v[40] = (x2-t1) >> 10;
-         v[24] = (x3+t0) >> 10;
-         v[32] = (x3-t0) >> 10;
-      }
-   }
-
-   for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
-      // no fast case since the first 1D IDCT spread components out
-      STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
-      // constants scaled things up by 1<<12, plus we had 1<<2 from first
-      // loop, plus horizontal and vertical each scale by sqrt(8) so together
-      // we've got an extra 1<<3, so 1<<17 total we need to remove.
-      // so we want to round that, which means adding 0.5 * 1<<17,
-      // aka 65536. Also, we'll end up with -128 to 127 that we want
-      // to encode as 0..255 by adding 128, so we'll add that before the shift
-      x0 += 65536 + (128<<17);
-      x1 += 65536 + (128<<17);
-      x2 += 65536 + (128<<17);
-      x3 += 65536 + (128<<17);
-      // tried computing the shifts into temps, or'ing the temps to see
-      // if any were out of range, but that was slower
-      o[0] = stbi__clamp((x0+t3) >> 17);
-      o[7] = stbi__clamp((x0-t3) >> 17);
-      o[1] = stbi__clamp((x1+t2) >> 17);
-      o[6] = stbi__clamp((x1-t2) >> 17);
-      o[2] = stbi__clamp((x2+t1) >> 17);
-      o[5] = stbi__clamp((x2-t1) >> 17);
-      o[3] = stbi__clamp((x3+t0) >> 17);
-      o[4] = stbi__clamp((x3-t0) >> 17);
-   }
-}
-
-#ifdef STBI_SSE2
-// sse2 integer IDCT. not the fastest possible implementation but it
-// produces bit-identical results to the generic C version so it's
-// fully "transparent".
-static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
-{
-   // This is constructed to match our regular (generic) integer IDCT exactly.
-   __m128i row0, row1, row2, row3, row4, row5, row6, row7;
-   __m128i tmp;
-
-   // dot product constant: even elems=x, odd elems=y
-   #define dct_const(x,y)  _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y))
-
-   // out(0) = c0[even]*x + c0[odd]*y   (c0, x, y 16-bit, out 32-bit)
-   // out(1) = c1[even]*x + c1[odd]*y
-   #define dct_rot(out0,out1, x,y,c0,c1) \
-      __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \
-      __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \
-      __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \
-      __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \
-      __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \
-      __m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
-
-   // out = in << 12  (in 16-bit, out 32-bit)
-   #define dct_widen(out, in) \
-      __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \
-      __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
-
-   // wide add
-   #define dct_wadd(out, a, b) \
-      __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \
-      __m128i out##_h = _mm_add_epi32(a##_h, b##_h)
-
-   // wide sub
-   #define dct_wsub(out, a, b) \
-      __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \
-      __m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
-
-   // butterfly a/b, add bias, then shift by "s" and pack
-   #define dct_bfly32o(out0, out1, a,b,bias,s) \
-      { \
-         __m128i abiased_l = _mm_add_epi32(a##_l, bias); \
-         __m128i abiased_h = _mm_add_epi32(a##_h, bias); \
-         dct_wadd(sum, abiased, b); \
-         dct_wsub(dif, abiased, b); \
-         out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \
-         out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \
-      }
-
-   // 8-bit interleave step (for transposes)
-   #define dct_interleave8(a, b) \
-      tmp = a; \
-      a = _mm_unpacklo_epi8(a, b); \
-      b = _mm_unpackhi_epi8(tmp, b)
-
-   // 16-bit interleave step (for transposes)
-   #define dct_interleave16(a, b) \
-      tmp = a; \
-      a = _mm_unpacklo_epi16(a, b); \
-      b = _mm_unpackhi_epi16(tmp, b)
-
-   #define dct_pass(bias,shift) \
-      { \
-         /* even part */ \
-         dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \
-         __m128i sum04 = _mm_add_epi16(row0, row4); \
-         __m128i dif04 = _mm_sub_epi16(row0, row4); \
-         dct_widen(t0e, sum04); \
-         dct_widen(t1e, dif04); \
-         dct_wadd(x0, t0e, t3e); \
-         dct_wsub(x3, t0e, t3e); \
-         dct_wadd(x1, t1e, t2e); \
-         dct_wsub(x2, t1e, t2e); \
-         /* odd part */ \
-         dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \
-         dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \
-         __m128i sum17 = _mm_add_epi16(row1, row7); \
-         __m128i sum35 = _mm_add_epi16(row3, row5); \
-         dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \
-         dct_wadd(x4, y0o, y4o); \
-         dct_wadd(x5, y1o, y5o); \
-         dct_wadd(x6, y2o, y5o); \
-         dct_wadd(x7, y3o, y4o); \
-         dct_bfly32o(row0,row7, x0,x7,bias,shift); \
-         dct_bfly32o(row1,row6, x1,x6,bias,shift); \
-         dct_bfly32o(row2,row5, x2,x5,bias,shift); \
-         dct_bfly32o(row3,row4, x3,x4,bias,shift); \
-      }
-
-   __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
-   __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f));
-   __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
-   __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
-   __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f));
-   __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f));
-   __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f));
-   __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f));
-
-   // rounding biases in column/row passes, see stbi__idct_block for explanation.
-   __m128i bias_0 = _mm_set1_epi32(512);
-   __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17));
-
-   // load
-   row0 = _mm_load_si128((const __m128i *) (data + 0*8));
-   row1 = _mm_load_si128((const __m128i *) (data + 1*8));
-   row2 = _mm_load_si128((const __m128i *) (data + 2*8));
-   row3 = _mm_load_si128((const __m128i *) (data + 3*8));
-   row4 = _mm_load_si128((const __m128i *) (data + 4*8));
-   row5 = _mm_load_si128((const __m128i *) (data + 5*8));
-   row6 = _mm_load_si128((const __m128i *) (data + 6*8));
-   row7 = _mm_load_si128((const __m128i *) (data + 7*8));
-
-   // column pass
-   dct_pass(bias_0, 10);
-
-   {
-      // 16bit 8x8 transpose pass 1
-      dct_interleave16(row0, row4);
-      dct_interleave16(row1, row5);
-      dct_interleave16(row2, row6);
-      dct_interleave16(row3, row7);
-
-      // transpose pass 2
-      dct_interleave16(row0, row2);
-      dct_interleave16(row1, row3);
-      dct_interleave16(row4, row6);
-      dct_interleave16(row5, row7);
-
-      // transpose pass 3
-      dct_interleave16(row0, row1);
-      dct_interleave16(row2, row3);
-      dct_interleave16(row4, row5);
-      dct_interleave16(row6, row7);
-   }
-
-   // row pass
-   dct_pass(bias_1, 17);
-
-   {
-      // pack
-      __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
-      __m128i p1 = _mm_packus_epi16(row2, row3);
-      __m128i p2 = _mm_packus_epi16(row4, row5);
-      __m128i p3 = _mm_packus_epi16(row6, row7);
-
-      // 8bit 8x8 transpose pass 1
-      dct_interleave8(p0, p2); // a0e0a1e1...
-      dct_interleave8(p1, p3); // c0g0c1g1...
-
-      // transpose pass 2
-      dct_interleave8(p0, p1); // a0c0e0g0...
-      dct_interleave8(p2, p3); // b0d0f0h0...
-
-      // transpose pass 3
-      dct_interleave8(p0, p2); // a0b0c0d0...
-      dct_interleave8(p1, p3); // a4b4c4d4...
-
-      // store
-      _mm_storel_epi64((__m128i *) out, p0); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, p2); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, p1); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, p3); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e));
-   }
-
-#undef dct_const
-#undef dct_rot
-#undef dct_widen
-#undef dct_wadd
-#undef dct_wsub
-#undef dct_bfly32o
-#undef dct_interleave8
-#undef dct_interleave16
-#undef dct_pass
-}
-
-#endif // STBI_SSE2
-
-#ifdef STBI_NEON
-
-// NEON integer IDCT. should produce bit-identical
-// results to the generic C version.
-static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
-{
-   int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
-
-   int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
-   int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
-   int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f));
-   int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f));
-   int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
-   int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
-   int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
-   int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
-   int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f));
-   int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f));
-   int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f));
-   int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f));
-
-#define dct_long_mul(out, inq, coeff) \
-   int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \
-   int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
-
-#define dct_long_mac(out, acc, inq, coeff) \
-   int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \
-   int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
-
-#define dct_widen(out, inq) \
-   int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \
-   int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
-
-// wide add
-#define dct_wadd(out, a, b) \
-   int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \
-   int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
-
-// wide sub
-#define dct_wsub(out, a, b) \
-   int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \
-   int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
-
-// butterfly a/b, then shift using "shiftop" by "s" and pack
-#define dct_bfly32o(out0,out1, a,b,shiftop,s) \
-   { \
-      dct_wadd(sum, a, b); \
-      dct_wsub(dif, a, b); \
-      out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \
-      out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \
-   }
-
-#define dct_pass(shiftop, shift) \
-   { \
-      /* even part */ \
-      int16x8_t sum26 = vaddq_s16(row2, row6); \
-      dct_long_mul(p1e, sum26, rot0_0); \
-      dct_long_mac(t2e, p1e, row6, rot0_1); \
-      dct_long_mac(t3e, p1e, row2, rot0_2); \
-      int16x8_t sum04 = vaddq_s16(row0, row4); \
-      int16x8_t dif04 = vsubq_s16(row0, row4); \
-      dct_widen(t0e, sum04); \
-      dct_widen(t1e, dif04); \
-      dct_wadd(x0, t0e, t3e); \
-      dct_wsub(x3, t0e, t3e); \
-      dct_wadd(x1, t1e, t2e); \
-      dct_wsub(x2, t1e, t2e); \
-      /* odd part */ \
-      int16x8_t sum15 = vaddq_s16(row1, row5); \
-      int16x8_t sum17 = vaddq_s16(row1, row7); \
-      int16x8_t sum35 = vaddq_s16(row3, row5); \
-      int16x8_t sum37 = vaddq_s16(row3, row7); \
-      int16x8_t sumodd = vaddq_s16(sum17, sum35); \
-      dct_long_mul(p5o, sumodd, rot1_0); \
-      dct_long_mac(p1o, p5o, sum17, rot1_1); \
-      dct_long_mac(p2o, p5o, sum35, rot1_2); \
-      dct_long_mul(p3o, sum37, rot2_0); \
-      dct_long_mul(p4o, sum15, rot2_1); \
-      dct_wadd(sump13o, p1o, p3o); \
-      dct_wadd(sump24o, p2o, p4o); \
-      dct_wadd(sump23o, p2o, p3o); \
-      dct_wadd(sump14o, p1o, p4o); \
-      dct_long_mac(x4, sump13o, row7, rot3_0); \
-      dct_long_mac(x5, sump24o, row5, rot3_1); \
-      dct_long_mac(x6, sump23o, row3, rot3_2); \
-      dct_long_mac(x7, sump14o, row1, rot3_3); \
-      dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \
-      dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \
-      dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \
-      dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \
-   }
-
-   // load
-   row0 = vld1q_s16(data + 0*8);
-   row1 = vld1q_s16(data + 1*8);
-   row2 = vld1q_s16(data + 2*8);
-   row3 = vld1q_s16(data + 3*8);
-   row4 = vld1q_s16(data + 4*8);
-   row5 = vld1q_s16(data + 5*8);
-   row6 = vld1q_s16(data + 6*8);
-   row7 = vld1q_s16(data + 7*8);
-
-   // add DC bias
-   row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
-
-   // column pass
-   dct_pass(vrshrn_n_s32, 10);
-
-   // 16bit 8x8 transpose
-   {
-// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
-// whether compilers actually get this is another story, sadly.
-#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; }
-#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); }
-#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); }
-
-      // pass 1
-      dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
-      dct_trn16(row2, row3);
-      dct_trn16(row4, row5);
-      dct_trn16(row6, row7);
-
-      // pass 2
-      dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
-      dct_trn32(row1, row3);
-      dct_trn32(row4, row6);
-      dct_trn32(row5, row7);
-
-      // pass 3
-      dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
-      dct_trn64(row1, row5);
-      dct_trn64(row2, row6);
-      dct_trn64(row3, row7);
-
-#undef dct_trn16
-#undef dct_trn32
-#undef dct_trn64
-   }
-
-   // row pass
-   // vrshrn_n_s32 only supports shifts up to 16, we need
-   // 17. so do a non-rounding shift of 16 first then follow
-   // up with a rounding shift by 1.
-   dct_pass(vshrn_n_s32, 16);
-
-   {
-      // pack and round
-      uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
-      uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
-      uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
-      uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
-      uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
-      uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
-      uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
-      uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
-
-      // again, these can translate into one instruction, but often don't.
-#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; }
-#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); }
-#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); }
-
-      // sadly can't use interleaved stores here since we only write
-      // 8 bytes to each scan line!
-
-      // 8x8 8-bit transpose pass 1
-      dct_trn8_8(p0, p1);
-      dct_trn8_8(p2, p3);
-      dct_trn8_8(p4, p5);
-      dct_trn8_8(p6, p7);
-
-      // pass 2
-      dct_trn8_16(p0, p2);
-      dct_trn8_16(p1, p3);
-      dct_trn8_16(p4, p6);
-      dct_trn8_16(p5, p7);
-
-      // pass 3
-      dct_trn8_32(p0, p4);
-      dct_trn8_32(p1, p5);
-      dct_trn8_32(p2, p6);
-      dct_trn8_32(p3, p7);
-
-      // store
-      vst1_u8(out, p0); out += out_stride;
-      vst1_u8(out, p1); out += out_stride;
-      vst1_u8(out, p2); out += out_stride;
-      vst1_u8(out, p3); out += out_stride;
-      vst1_u8(out, p4); out += out_stride;
-      vst1_u8(out, p5); out += out_stride;
-      vst1_u8(out, p6); out += out_stride;
-      vst1_u8(out, p7);
-
-#undef dct_trn8_8
-#undef dct_trn8_16
-#undef dct_trn8_32
-   }
-
-#undef dct_long_mul
-#undef dct_long_mac
-#undef dct_widen
-#undef dct_wadd
-#undef dct_wsub
-#undef dct_bfly32o
-#undef dct_pass
-}
-
-#endif // STBI_NEON
-
-#define STBI__MARKER_none  0xff
-// if there's a pending marker from the entropy stream, return that
-// otherwise, fetch from the stream and get a marker. if there's no
-// marker, return 0xff, which is never a valid marker value
-static stbi_uc stbi__get_marker(stbi__jpeg *j)
-{
-   stbi_uc x;
-   if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; }
-   x = stbi__get8(j->s);
-   if (x != 0xff) return STBI__MARKER_none;
-   while (x == 0xff)
-      x = stbi__get8(j->s); // consume repeated 0xff fill bytes
-   return x;
-}
-
-// in each scan, we'll have scan_n components, and the order
-// of the components is specified by order[]
-#define STBI__RESTART(x)     ((x) >= 0xd0 && (x) <= 0xd7)
-
-// after a restart interval, stbi__jpeg_reset the entropy decoder and
-// the dc prediction
-static void stbi__jpeg_reset(stbi__jpeg *j)
-{
-   j->code_bits = 0;
-   j->code_buffer = 0;
-   j->nomore = 0;
-   j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
-   j->marker = STBI__MARKER_none;
-   j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
-   j->eob_run = 0;
-   // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
-   // since we don't even allow 1<<30 pixels
-}
-
-static int stbi__parse_entropy_coded_data(stbi__jpeg *z)
-{
-   stbi__jpeg_reset(z);
-   if (!z->progressive) {
-      if (z->scan_n == 1) {
-         int i,j;
-         STBI_SIMD_ALIGN(short, data[64]);
-         int n = z->order[0];
-         // non-interleaved data, we just need to process one block at a time,
-         // in trivial scanline order
-         // number of blocks to do just depends on how many actual "pixels" this
-         // component has, independent of interleaved MCU blocking and such
-         int w = (z->img_comp[n].x+7) >> 3;
-         int h = (z->img_comp[n].y+7) >> 3;
-         for (j=0; j < h; ++j) {
-            for (i=0; i < w; ++i) {
-               int ha = z->img_comp[n].ha;
-               if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
-               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
-               // every data block is an MCU, so countdown the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  // if it's NOT a restart, then just bail, so we get corrupt data
-                  // rather than no data
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      } else { // interleaved
-         int i,j,k,x,y;
-         STBI_SIMD_ALIGN(short, data[64]);
-         for (j=0; j < z->img_mcu_y; ++j) {
-            for (i=0; i < z->img_mcu_x; ++i) {
-               // scan an interleaved mcu... process scan_n components in order
-               for (k=0; k < z->scan_n; ++k) {
-                  int n = z->order[k];
-                  // scan out an mcu's worth of this component; that's just determined
-                  // by the basic H and V specified for the component
-                  for (y=0; y < z->img_comp[n].v; ++y) {
-                     for (x=0; x < z->img_comp[n].h; ++x) {
-                        int x2 = (i*z->img_comp[n].h + x)*8;
-                        int y2 = (j*z->img_comp[n].v + y)*8;
-                        int ha = z->img_comp[n].ha;
-                        if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
-                        z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data);
-                     }
-                  }
-               }
-               // after all interleaved components, that's an interleaved MCU,
-               // so now count down the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      }
-   } else {
-      if (z->scan_n == 1) {
-         int i,j;
-         int n = z->order[0];
-         // non-interleaved data, we just need to process one block at a time,
-         // in trivial scanline order
-         // number of blocks to do just depends on how many actual "pixels" this
-         // component has, independent of interleaved MCU blocking and such
-         int w = (z->img_comp[n].x+7) >> 3;
-         int h = (z->img_comp[n].y+7) >> 3;
-         for (j=0; j < h; ++j) {
-            for (i=0; i < w; ++i) {
-               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
-               if (z->spec_start == 0) {
-                  if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
-                     return 0;
-               } else {
-                  int ha = z->img_comp[n].ha;
-                  if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
-                     return 0;
-               }
-               // every data block is an MCU, so countdown the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      } else { // interleaved
-         int i,j,k,x,y;
-         for (j=0; j < z->img_mcu_y; ++j) {
-            for (i=0; i < z->img_mcu_x; ++i) {
-               // scan an interleaved mcu... process scan_n components in order
-               for (k=0; k < z->scan_n; ++k) {
-                  int n = z->order[k];
-                  // scan out an mcu's worth of this component; that's just determined
-                  // by the basic H and V specified for the component
-                  for (y=0; y < z->img_comp[n].v; ++y) {
-                     for (x=0; x < z->img_comp[n].h; ++x) {
-                        int x2 = (i*z->img_comp[n].h + x);
-                        int y2 = (j*z->img_comp[n].v + y);
-                        short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w);
-                        if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
-                           return 0;
-                     }
-                  }
-               }
-               // after all interleaved components, that's an interleaved MCU,
-               // so now count down the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      }
-   }
-}
-
-static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant)
-{
-   int i;
-   for (i=0; i < 64; ++i)
-      data[i] *= dequant[i];
-}
-
-static void stbi__jpeg_finish(stbi__jpeg *z)
-{
-   if (z->progressive) {
-      // dequantize and idct the data
-      int i,j,n;
-      for (n=0; n < z->s->img_n; ++n) {
-         int w = (z->img_comp[n].x+7) >> 3;
-         int h = (z->img_comp[n].y+7) >> 3;
-         for (j=0; j < h; ++j) {
-            for (i=0; i < w; ++i) {
-               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
-               stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
-               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
-            }
-         }
-      }
-   }
-}
-
-static int stbi__process_marker(stbi__jpeg *z, int m)
-{
-   int L;
-   switch (m) {
-      case STBI__MARKER_none: // no marker found
-         return stbi__err("expected marker","Corrupt JPEG");
-
-      case 0xDD: // DRI - specify restart interval
-         if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG");
-         z->restart_interval = stbi__get16be(z->s);
-         return 1;
-
-      case 0xDB: // DQT - define quantization table
-         L = stbi__get16be(z->s)-2;
-         while (L > 0) {
-            int q = stbi__get8(z->s);
-            int p = q >> 4, sixteen = (p != 0);
-            int t = q & 15,i;
-            if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG");
-            if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG");
-
-            for (i=0; i < 64; ++i)
-               z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
-            L -= (sixteen ? 129 : 65);
-         }
-         return L==0;
-
-      case 0xC4: // DHT - define huffman table
-         L = stbi__get16be(z->s)-2;
-         while (L > 0) {
-            stbi_uc *v;
-            int sizes[16],i,n=0;
-            int q = stbi__get8(z->s);
-            int tc = q >> 4;
-            int th = q & 15;
-            if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG");
-            for (i=0; i < 16; ++i) {
-               sizes[i] = stbi__get8(z->s);
-               n += sizes[i];
-            }
-            if(n > 256) return stbi__err("bad DHT header","Corrupt JPEG"); // Loop over i < n would write past end of values!
-            L -= 17;
-            if (tc == 0) {
-               if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0;
-               v = z->huff_dc[th].values;
-            } else {
-               if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0;
-               v = z->huff_ac[th].values;
-            }
-            for (i=0; i < n; ++i)
-               v[i] = stbi__get8(z->s);
-            if (tc != 0)
-               stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
-            L -= n;
-         }
-         return L==0;
-   }
-
-   // check for comment block or APP blocks
-   if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
-      L = stbi__get16be(z->s);
-      if (L < 2) {
-         if (m == 0xFE)
-            return stbi__err("bad COM len","Corrupt JPEG");
-         else
-            return stbi__err("bad APP len","Corrupt JPEG");
-      }
-      L -= 2;
-
-      if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
-         static const unsigned char tag[5] = {'J','F','I','F','\0'};
-         int ok = 1;
-         int i;
-         for (i=0; i < 5; ++i)
-            if (stbi__get8(z->s) != tag[i])
-               ok = 0;
-         L -= 5;
-         if (ok)
-            z->jfif = 1;
-      } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
-         static const unsigned char tag[6] = {'A','d','o','b','e','\0'};
-         int ok = 1;
-         int i;
-         for (i=0; i < 6; ++i)
-            if (stbi__get8(z->s) != tag[i])
-               ok = 0;
-         L -= 6;
-         if (ok) {
-            stbi__get8(z->s); // version
-            stbi__get16be(z->s); // flags0
-            stbi__get16be(z->s); // flags1
-            z->app14_color_transform = stbi__get8(z->s); // color transform
-            L -= 6;
-         }
-      }
-
-      stbi__skip(z->s, L);
-      return 1;
-   }
-
-   return stbi__err("unknown marker","Corrupt JPEG");
-}
-
-// after we see SOS
-static int stbi__process_scan_header(stbi__jpeg *z)
-{
-   int i;
-   int Ls = stbi__get16be(z->s);
-   z->scan_n = stbi__get8(z->s);
-   if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG");
-   if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG");
-   for (i=0; i < z->scan_n; ++i) {
-      int id = stbi__get8(z->s), which;
-      int q = stbi__get8(z->s);
-      for (which = 0; which < z->s->img_n; ++which)
-         if (z->img_comp[which].id == id)
-            break;
-      if (which == z->s->img_n) return 0; // no match
-      z->img_comp[which].hd = q >> 4;   if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG");
-      z->img_comp[which].ha = q & 15;   if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG");
-      z->order[i] = which;
-   }
-
-   {
-      int aa;
-      z->spec_start = stbi__get8(z->s);
-      z->spec_end   = stbi__get8(z->s); // should be 63, but might be 0
-      aa = stbi__get8(z->s);
-      z->succ_high = (aa >> 4);
-      z->succ_low  = (aa & 15);
-      if (z->progressive) {
-         if (z->spec_start > 63 || z->spec_end > 63  || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13)
-            return stbi__err("bad SOS", "Corrupt JPEG");
-      } else {
-         if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG");
-         if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG");
-         z->spec_end = 63;
-      }
-   }
-
-   return 1;
-}
-
-static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why)
-{
-   int i;
-   for (i=0; i < ncomp; ++i) {
-      if (z->img_comp[i].raw_data) {
-         STBI_FREE(z->img_comp[i].raw_data);
-         z->img_comp[i].raw_data = NULL;
-         z->img_comp[i].data = NULL;
-      }
-      if (z->img_comp[i].raw_coeff) {
-         STBI_FREE(z->img_comp[i].raw_coeff);
-         z->img_comp[i].raw_coeff = 0;
-         z->img_comp[i].coeff = 0;
-      }
-      if (z->img_comp[i].linebuf) {
-         STBI_FREE(z->img_comp[i].linebuf);
-         z->img_comp[i].linebuf = NULL;
-      }
-   }
-   return why;
-}
-
-static int stbi__process_frame_header(stbi__jpeg *z, int scan)
-{
-   stbi__context *s = z->s;
-   int Lf,p,i,q, h_max=1,v_max=1,c;
-   Lf = stbi__get16be(s);         if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG
-   p  = stbi__get8(s);            if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
-   s->img_y = stbi__get16be(s);   if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
-   s->img_x = stbi__get16be(s);   if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires
-   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-   c = stbi__get8(s);
-   if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG");
-   s->img_n = c;
-   for (i=0; i < c; ++i) {
-      z->img_comp[i].data = NULL;
-      z->img_comp[i].linebuf = NULL;
-   }
-
-   if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG");
-
-   z->rgb = 0;
-   for (i=0; i < s->img_n; ++i) {
-      static const unsigned char rgb[3] = { 'R', 'G', 'B' };
-      z->img_comp[i].id = stbi__get8(s);
-      if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
-         ++z->rgb;
-      q = stbi__get8(s);
-      z->img_comp[i].h = (q >> 4);  if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG");
-      z->img_comp[i].v = q & 15;    if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG");
-      z->img_comp[i].tq = stbi__get8(s);  if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG");
-   }
-
-   if (scan != STBI__SCAN_load) return 1;
-
-   if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode");
-
-   for (i=0; i < s->img_n; ++i) {
-      if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h;
-      if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
-   }
-
-   // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios
-   // and I've never seen a non-corrupted JPEG file actually use them
-   for (i=0; i < s->img_n; ++i) {
-      if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG");
-      if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG");
-   }
-
-   // compute interleaved mcu info
-   z->img_h_max = h_max;
-   z->img_v_max = v_max;
-   z->img_mcu_w = h_max * 8;
-   z->img_mcu_h = v_max * 8;
-   // these sizes can't be more than 17 bits
-   z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w;
-   z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h;
-
-   for (i=0; i < s->img_n; ++i) {
-      // number of effective pixels (e.g. for non-interleaved MCU)
-      z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max;
-      z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max;
-      // to simplify generation, we'll allocate enough memory to decode
-      // the bogus oversized data from using interleaved MCUs and their
-      // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
-      // discard the extra data until colorspace conversion
-      //
-      // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier)
-      // so these muls can't overflow with 32-bit ints (which we require)
-      z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
-      z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
-      z->img_comp[i].coeff = 0;
-      z->img_comp[i].raw_coeff = 0;
-      z->img_comp[i].linebuf = NULL;
-      z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
-      if (z->img_comp[i].raw_data == NULL)
-         return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
-      // align blocks for idct using mmx/sse
-      z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15);
-      if (z->progressive) {
-         // w2, h2 are multiples of 8 (see above)
-         z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
-         z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
-         z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
-         if (z->img_comp[i].raw_coeff == NULL)
-            return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
-         z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15);
-      }
-   }
-
-   return 1;
-}
-
-// use comparisons since in some cases we handle more than one case (e.g. SOF)
-#define stbi__DNL(x)         ((x) == 0xdc)
-#define stbi__SOI(x)         ((x) == 0xd8)
-#define stbi__EOI(x)         ((x) == 0xd9)
-#define stbi__SOF(x)         ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
-#define stbi__SOS(x)         ((x) == 0xda)
-
-#define stbi__SOF_progressive(x)   ((x) == 0xc2)
-
-static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan)
-{
-   int m;
-   z->jfif = 0;
-   z->app14_color_transform = -1; // valid values are 0,1,2
-   z->marker = STBI__MARKER_none; // initialize cached marker to empty
-   m = stbi__get_marker(z);
-   if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG");
-   if (scan == STBI__SCAN_type) return 1;
-   m = stbi__get_marker(z);
-   while (!stbi__SOF(m)) {
-      if (!stbi__process_marker(z,m)) return 0;
-      m = stbi__get_marker(z);
-      while (m == STBI__MARKER_none) {
-         // some files have extra padding after their blocks, so ok, we'll scan
-         if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG");
-         m = stbi__get_marker(z);
-      }
-   }
-   z->progressive = stbi__SOF_progressive(m);
-   if (!stbi__process_frame_header(z, scan)) return 0;
-   return 1;
-}
-
-static stbi_uc stbi__skip_jpeg_junk_at_end(stbi__jpeg *j)
-{
-   // some JPEGs have junk at end, skip over it but if we find what looks
-   // like a valid marker, resume there
-   while (!stbi__at_eof(j->s)) {
-      stbi_uc x = stbi__get8(j->s);
-      while (x == 0xff) { // might be a marker
-         if (stbi__at_eof(j->s)) return STBI__MARKER_none;
-         x = stbi__get8(j->s);
-         if (x != 0x00 && x != 0xff) {
-            // not a stuffed zero or lead-in to another marker, looks
-            // like an actual marker, return it
-            return x;
-         }
-         // stuffed zero has x=0 now which ends the loop, meaning we go
-         // back to regular scan loop.
-         // repeated 0xff keeps trying to read the next byte of the marker.
-      }
-   }
-   return STBI__MARKER_none;
-}
-
-// decode image to YCbCr format
-static int stbi__decode_jpeg_image(stbi__jpeg *j)
-{
-   int m;
-   for (m = 0; m < 4; m++) {
-      j->img_comp[m].raw_data = NULL;
-      j->img_comp[m].raw_coeff = NULL;
-   }
-   j->restart_interval = 0;
-   if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0;
-   m = stbi__get_marker(j);
-   while (!stbi__EOI(m)) {
-      if (stbi__SOS(m)) {
-         if (!stbi__process_scan_header(j)) return 0;
-         if (!stbi__parse_entropy_coded_data(j)) return 0;
-         if (j->marker == STBI__MARKER_none ) {
-         j->marker = stbi__skip_jpeg_junk_at_end(j);
-            // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
-         }
-         m = stbi__get_marker(j);
-         if (STBI__RESTART(m))
-            m = stbi__get_marker(j);
-      } else if (stbi__DNL(m)) {
-         int Ld = stbi__get16be(j->s);
-         stbi__uint32 NL = stbi__get16be(j->s);
-         if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG");
-         if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG");
-         m = stbi__get_marker(j);
-      } else {
-         if (!stbi__process_marker(j, m)) return 1;
-         m = stbi__get_marker(j);
-      }
-   }
-   if (j->progressive)
-      stbi__jpeg_finish(j);
-   return 1;
-}
-
-// static jfif-centered resampling (across block boundaries)
-
-typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1,
-                                    int w, int hs);
-
-#define stbi__div4(x) ((stbi_uc) ((x) >> 2))
-
-static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   STBI_NOTUSED(out);
-   STBI_NOTUSED(in_far);
-   STBI_NOTUSED(w);
-   STBI_NOTUSED(hs);
-   return in_near;
-}
-
-static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate two samples vertically for every one in input
-   int i;
-   STBI_NOTUSED(hs);
-   for (i=0; i < w; ++i)
-      out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2);
-   return out;
-}
-
-static stbi_uc*  stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate two samples horizontally for every one in input
-   int i;
-   stbi_uc *input = in_near;
-
-   if (w == 1) {
-      // if only one sample, can't do any interpolation
-      out[0] = out[1] = input[0];
-      return out;
-   }
-
-   out[0] = input[0];
-   out[1] = stbi__div4(input[0]*3 + input[1] + 2);
-   for (i=1; i < w-1; ++i) {
-      int n = 3*input[i]+2;
-      out[i*2+0] = stbi__div4(n+input[i-1]);
-      out[i*2+1] = stbi__div4(n+input[i+1]);
-   }
-   out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2);
-   out[i*2+1] = input[w-1];
-
-   STBI_NOTUSED(in_far);
-   STBI_NOTUSED(hs);
-
-   return out;
-}
-
-#define stbi__div16(x) ((stbi_uc) ((x) >> 4))
-
-static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate 2x2 samples for every one in input
-   int i,t0,t1;
-   if (w == 1) {
-      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
-      return out;
-   }
-
-   t1 = 3*in_near[0] + in_far[0];
-   out[0] = stbi__div4(t1+2);
-   for (i=1; i < w; ++i) {
-      t0 = t1;
-      t1 = 3*in_near[i]+in_far[i];
-      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
-      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
-   }
-   out[w*2-1] = stbi__div4(t1+2);
-
-   STBI_NOTUSED(hs);
-
-   return out;
-}
-
-#if defined(STBI_SSE2) || defined(STBI_NEON)
-static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate 2x2 samples for every one in input
-   int i=0,t0,t1;
-
-   if (w == 1) {
-      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
-      return out;
-   }
-
-   t1 = 3*in_near[0] + in_far[0];
-   // process groups of 8 pixels for as long as we can.
-   // note we can't handle the last pixel in a row in this loop
-   // because we need to handle the filter boundary conditions.
-   for (; i < ((w-1) & ~7); i += 8) {
-#if defined(STBI_SSE2)
-      // load and perform the vertical filtering pass
-      // this uses 3*x + y = 4*x + (y - x)
-      __m128i zero  = _mm_setzero_si128();
-      __m128i farb  = _mm_loadl_epi64((__m128i *) (in_far + i));
-      __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i));
-      __m128i farw  = _mm_unpacklo_epi8(farb, zero);
-      __m128i nearw = _mm_unpacklo_epi8(nearb, zero);
-      __m128i diff  = _mm_sub_epi16(farw, nearw);
-      __m128i nears = _mm_slli_epi16(nearw, 2);
-      __m128i curr  = _mm_add_epi16(nears, diff); // current row
-
-      // horizontal filter works the same based on shifted vers of current
-      // row. "prev" is current row shifted right by 1 pixel; we need to
-      // insert the previous pixel value (from t1).
-      // "next" is current row shifted left by 1 pixel, with first pixel
-      // of next block of 8 pixels added in.
-      __m128i prv0 = _mm_slli_si128(curr, 2);
-      __m128i nxt0 = _mm_srli_si128(curr, 2);
-      __m128i prev = _mm_insert_epi16(prv0, t1, 0);
-      __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7);
-
-      // horizontal filter, polyphase implementation since it's convenient:
-      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
-      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
-      // note the shared term.
-      __m128i bias  = _mm_set1_epi16(8);
-      __m128i curs = _mm_slli_epi16(curr, 2);
-      __m128i prvd = _mm_sub_epi16(prev, curr);
-      __m128i nxtd = _mm_sub_epi16(next, curr);
-      __m128i curb = _mm_add_epi16(curs, bias);
-      __m128i even = _mm_add_epi16(prvd, curb);
-      __m128i odd  = _mm_add_epi16(nxtd, curb);
-
-      // interleave even and odd pixels, then undo scaling.
-      __m128i int0 = _mm_unpacklo_epi16(even, odd);
-      __m128i int1 = _mm_unpackhi_epi16(even, odd);
-      __m128i de0  = _mm_srli_epi16(int0, 4);
-      __m128i de1  = _mm_srli_epi16(int1, 4);
-
-      // pack and write output
-      __m128i outv = _mm_packus_epi16(de0, de1);
-      _mm_storeu_si128((__m128i *) (out + i*2), outv);
-#elif defined(STBI_NEON)
-      // load and perform the vertical filtering pass
-      // this uses 3*x + y = 4*x + (y - x)
-      uint8x8_t farb  = vld1_u8(in_far + i);
-      uint8x8_t nearb = vld1_u8(in_near + i);
-      int16x8_t diff  = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
-      int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
-      int16x8_t curr  = vaddq_s16(nears, diff); // current row
-
-      // horizontal filter works the same based on shifted vers of current
-      // row. "prev" is current row shifted right by 1 pixel; we need to
-      // insert the previous pixel value (from t1).
-      // "next" is current row shifted left by 1 pixel, with first pixel
-      // of next block of 8 pixels added in.
-      int16x8_t prv0 = vextq_s16(curr, curr, 7);
-      int16x8_t nxt0 = vextq_s16(curr, curr, 1);
-      int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
-      int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7);
-
-      // horizontal filter, polyphase implementation since it's convenient:
-      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
-      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
-      // note the shared term.
-      int16x8_t curs = vshlq_n_s16(curr, 2);
-      int16x8_t prvd = vsubq_s16(prev, curr);
-      int16x8_t nxtd = vsubq_s16(next, curr);
-      int16x8_t even = vaddq_s16(curs, prvd);
-      int16x8_t odd  = vaddq_s16(curs, nxtd);
-
-      // undo scaling and round, then store with even/odd phases interleaved
-      uint8x8x2_t o;
-      o.val[0] = vqrshrun_n_s16(even, 4);
-      o.val[1] = vqrshrun_n_s16(odd,  4);
-      vst2_u8(out + i*2, o);
-#endif
-
-      // "previous" value for next iter
-      t1 = 3*in_near[i+7] + in_far[i+7];
-   }
-
-   t0 = t1;
-   t1 = 3*in_near[i] + in_far[i];
-   out[i*2] = stbi__div16(3*t1 + t0 + 8);
-
-   for (++i; i < w; ++i) {
-      t0 = t1;
-      t1 = 3*in_near[i]+in_far[i];
-      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
-      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
-   }
-   out[w*2-1] = stbi__div4(t1+2);
-
-   STBI_NOTUSED(hs);
-
-   return out;
-}
-#endif
-
-static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // resample with nearest-neighbor
-   int i,j;
-   STBI_NOTUSED(in_far);
-   for (i=0; i < w; ++i)
-      for (j=0; j < hs; ++j)
-         out[i*hs+j] = in_near[i];
-   return out;
-}
-
-// this is a reduced-precision calculation of YCbCr-to-RGB introduced
-// to make sure the code produces the same results in both SIMD and scalar
-#define stbi__float2fixed(x)  (((int) ((x) * 4096.0f + 0.5f)) << 8)
-static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step)
-{
-   int i;
-   for (i=0; i < count; ++i) {
-      int y_fixed = (y[i] << 20) + (1<<19); // rounding
-      int r,g,b;
-      int cr = pcr[i] - 128;
-      int cb = pcb[i] - 128;
-      r = y_fixed +  cr* stbi__float2fixed(1.40200f);
-      g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
-      b = y_fixed                                     +   cb* stbi__float2fixed(1.77200f);
-      r >>= 20;
-      g >>= 20;
-      b >>= 20;
-      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
-      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
-      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
-      out[0] = (stbi_uc)r;
-      out[1] = (stbi_uc)g;
-      out[2] = (stbi_uc)b;
-      out[3] = 255;
-      out += step;
-   }
-}
-
-#if defined(STBI_SSE2) || defined(STBI_NEON)
-static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step)
-{
-   int i = 0;
-
-#ifdef STBI_SSE2
-   // step == 3 is pretty ugly on the final interleave, and i'm not convinced
-   // it's useful in practice (you wouldn't use it for textures, for example).
-   // so just accelerate step == 4 case.
-   if (step == 4) {
-      // this is a fairly straightforward implementation and not super-optimized.
-      __m128i signflip  = _mm_set1_epi8(-0x80);
-      __m128i cr_const0 = _mm_set1_epi16(   (short) ( 1.40200f*4096.0f+0.5f));
-      __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f));
-      __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f));
-      __m128i cb_const1 = _mm_set1_epi16(   (short) ( 1.77200f*4096.0f+0.5f));
-      __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128);
-      __m128i xw = _mm_set1_epi16(255); // alpha channel
-
-      for (; i+7 < count; i += 8) {
-         // load
-         __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i));
-         __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i));
-         __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i));
-         __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
-         __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
-
-         // unpack to short (and left-shift cr, cb by 8)
-         __m128i yw  = _mm_unpacklo_epi8(y_bias, y_bytes);
-         __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
-         __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
-
-         // color transform
-         __m128i yws = _mm_srli_epi16(yw, 4);
-         __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
-         __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
-         __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
-         __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
-         __m128i rws = _mm_add_epi16(cr0, yws);
-         __m128i gwt = _mm_add_epi16(cb0, yws);
-         __m128i bws = _mm_add_epi16(yws, cb1);
-         __m128i gws = _mm_add_epi16(gwt, cr1);
-
-         // descale
-         __m128i rw = _mm_srai_epi16(rws, 4);
-         __m128i bw = _mm_srai_epi16(bws, 4);
-         __m128i gw = _mm_srai_epi16(gws, 4);
-
-         // back to byte, set up for transpose
-         __m128i brb = _mm_packus_epi16(rw, bw);
-         __m128i gxb = _mm_packus_epi16(gw, xw);
-
-         // transpose to interleave channels
-         __m128i t0 = _mm_unpacklo_epi8(brb, gxb);
-         __m128i t1 = _mm_unpackhi_epi8(brb, gxb);
-         __m128i o0 = _mm_unpacklo_epi16(t0, t1);
-         __m128i o1 = _mm_unpackhi_epi16(t0, t1);
-
-         // store
-         _mm_storeu_si128((__m128i *) (out + 0), o0);
-         _mm_storeu_si128((__m128i *) (out + 16), o1);
-         out += 32;
-      }
-   }
-#endif
-
-#ifdef STBI_NEON
-   // in this version, step=3 support would be easy to add. but is there demand?
-   if (step == 4) {
-      // this is a fairly straightforward implementation and not super-optimized.
-      uint8x8_t signflip = vdup_n_u8(0x80);
-      int16x8_t cr_const0 = vdupq_n_s16(   (short) ( 1.40200f*4096.0f+0.5f));
-      int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f));
-      int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f));
-      int16x8_t cb_const1 = vdupq_n_s16(   (short) ( 1.77200f*4096.0f+0.5f));
-
-      for (; i+7 < count; i += 8) {
-         // load
-         uint8x8_t y_bytes  = vld1_u8(y + i);
-         uint8x8_t cr_bytes = vld1_u8(pcr + i);
-         uint8x8_t cb_bytes = vld1_u8(pcb + i);
-         int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
-         int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
-
-         // expand to s16
-         int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
-         int16x8_t crw = vshll_n_s8(cr_biased, 7);
-         int16x8_t cbw = vshll_n_s8(cb_biased, 7);
-
-         // color transform
-         int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
-         int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
-         int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
-         int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
-         int16x8_t rws = vaddq_s16(yws, cr0);
-         int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
-         int16x8_t bws = vaddq_s16(yws, cb1);
-
-         // undo scaling, round, convert to byte
-         uint8x8x4_t o;
-         o.val[0] = vqrshrun_n_s16(rws, 4);
-         o.val[1] = vqrshrun_n_s16(gws, 4);
-         o.val[2] = vqrshrun_n_s16(bws, 4);
-         o.val[3] = vdup_n_u8(255);
-
-         // store, interleaving r/g/b/a
-         vst4_u8(out, o);
-         out += 8*4;
-      }
-   }
-#endif
-
-   for (; i < count; ++i) {
-      int y_fixed = (y[i] << 20) + (1<<19); // rounding
-      int r,g,b;
-      int cr = pcr[i] - 128;
-      int cb = pcb[i] - 128;
-      r = y_fixed + cr* stbi__float2fixed(1.40200f);
-      g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
-      b = y_fixed                                   +   cb* stbi__float2fixed(1.77200f);
-      r >>= 20;
-      g >>= 20;
-      b >>= 20;
-      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
-      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
-      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
-      out[0] = (stbi_uc)r;
-      out[1] = (stbi_uc)g;
-      out[2] = (stbi_uc)b;
-      out[3] = 255;
-      out += step;
-   }
-}
-#endif
-
-// set up the kernels
-static void stbi__setup_jpeg(stbi__jpeg *j)
-{
-   j->idct_block_kernel = stbi__idct_block;
-   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
-   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
-
-#ifdef STBI_SSE2
-   if (stbi__sse2_available()) {
-      j->idct_block_kernel = stbi__idct_simd;
-      j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
-      j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
-   }
-#endif
-
-#ifdef STBI_NEON
-   j->idct_block_kernel = stbi__idct_simd;
-   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
-   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
-#endif
-}
-
-// clean up the temporary component buffers
-static void stbi__cleanup_jpeg(stbi__jpeg *j)
-{
-   stbi__free_jpeg_components(j, j->s->img_n, 0);
-}
-
-typedef struct
-{
-   resample_row_func resample;
-   stbi_uc *line0,*line1;
-   int hs,vs;   // expansion factor in each axis
-   int w_lores; // horizontal pixels pre-expansion
-   int ystep;   // how far through vertical expansion we are
-   int ypos;    // which pre-expansion row we're on
-} stbi__resample;
-
-// fast 0..255 * 0..255 => 0..255 rounded multiplication
-static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y)
-{
-   unsigned int t = x*y + 128;
-   return (stbi_uc) ((t + (t >>8)) >> 8);
-}
-
-static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp)
-{
-   int n, decode_n, is_rgb;
-   z->s->img_n = 0; // make stbi__cleanup_jpeg safe
-
-   // validate req_comp
-   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
-
-   // load a jpeg image from whichever source, but leave in YCbCr format
-   if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
-
-   // determine actual number of components to generate
-   n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
-
-   is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
-
-   if (z->s->img_n == 3 && n < 3 && !is_rgb)
-      decode_n = 1;
-   else
-      decode_n = z->s->img_n;
-
-   // nothing to do if no components requested; check this now to avoid
-   // accessing uninitialized coutput[0] later
-   if (decode_n <= 0) { stbi__cleanup_jpeg(z); return NULL; }
-
-   // resample and color-convert
-   {
-      int k;
-      unsigned int i,j;
-      stbi_uc *output;
-      stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL };
-
-      stbi__resample res_comp[4];
-
-      for (k=0; k < decode_n; ++k) {
-         stbi__resample *r = &res_comp[k];
-
-         // allocate line buffer big enough for upsampling off the edges
-         // with upsample factor of 4
-         z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3);
-         if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
-
-         r->hs      = z->img_h_max / z->img_comp[k].h;
-         r->vs      = z->img_v_max / z->img_comp[k].v;
-         r->ystep   = r->vs >> 1;
-         r->w_lores = (z->s->img_x + r->hs-1) / r->hs;
-         r->ypos    = 0;
-         r->line0   = r->line1 = z->img_comp[k].data;
-
-         if      (r->hs == 1 && r->vs == 1) r->resample = resample_row_1;
-         else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2;
-         else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2;
-         else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel;
-         else                               r->resample = stbi__resample_row_generic;
-      }
-
-      // can't error after this so, this is safe
-      output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
-      if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
-
-      // now go ahead and resample
-      for (j=0; j < z->s->img_y; ++j) {
-         stbi_uc *out = output + n * z->s->img_x * j;
-         for (k=0; k < decode_n; ++k) {
-            stbi__resample *r = &res_comp[k];
-            int y_bot = r->ystep >= (r->vs >> 1);
-            coutput[k] = r->resample(z->img_comp[k].linebuf,
-                                     y_bot ? r->line1 : r->line0,
-                                     y_bot ? r->line0 : r->line1,
-                                     r->w_lores, r->hs);
-            if (++r->ystep >= r->vs) {
-               r->ystep = 0;
-               r->line0 = r->line1;
-               if (++r->ypos < z->img_comp[k].y)
-                  r->line1 += z->img_comp[k].w2;
-            }
-         }
-         if (n >= 3) {
-            stbi_uc *y = coutput[0];
-            if (z->s->img_n == 3) {
-               if (is_rgb) {
-                  for (i=0; i < z->s->img_x; ++i) {
-                     out[0] = y[i];
-                     out[1] = coutput[1][i];
-                     out[2] = coutput[2][i];
-                     out[3] = 255;
-                     out += n;
-                  }
-               } else {
-                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-               }
-            } else if (z->s->img_n == 4) {
-               if (z->app14_color_transform == 0) { // CMYK
-                  for (i=0; i < z->s->img_x; ++i) {
-                     stbi_uc m = coutput[3][i];
-                     out[0] = stbi__blinn_8x8(coutput[0][i], m);
-                     out[1] = stbi__blinn_8x8(coutput[1][i], m);
-                     out[2] = stbi__blinn_8x8(coutput[2][i], m);
-                     out[3] = 255;
-                     out += n;
-                  }
-               } else if (z->app14_color_transform == 2) { // YCCK
-                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-                  for (i=0; i < z->s->img_x; ++i) {
-                     stbi_uc m = coutput[3][i];
-                     out[0] = stbi__blinn_8x8(255 - out[0], m);
-                     out[1] = stbi__blinn_8x8(255 - out[1], m);
-                     out[2] = stbi__blinn_8x8(255 - out[2], m);
-                     out += n;
-                  }
-               } else { // YCbCr + alpha?  Ignore the fourth channel for now
-                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-               }
-            } else
-               for (i=0; i < z->s->img_x; ++i) {
-                  out[0] = out[1] = out[2] = y[i];
-                  out[3] = 255; // not used if n==3
-                  out += n;
-               }
-         } else {
-            if (is_rgb) {
-               if (n == 1)
-                  for (i=0; i < z->s->img_x; ++i)
-                     *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
-               else {
-                  for (i=0; i < z->s->img_x; ++i, out += 2) {
-                     out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
-                     out[1] = 255;
-                  }
-               }
-            } else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
-               for (i=0; i < z->s->img_x; ++i) {
-                  stbi_uc m = coutput[3][i];
-                  stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
-                  stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
-                  stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
-                  out[0] = stbi__compute_y(r, g, b);
-                  out[1] = 255;
-                  out += n;
-               }
-            } else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
-               for (i=0; i < z->s->img_x; ++i) {
-                  out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
-                  out[1] = 255;
-                  out += n;
-               }
-            } else {
-               stbi_uc *y = coutput[0];
-               if (n == 1)
-                  for (i=0; i < z->s->img_x; ++i) out[i] = y[i];
-               else
-                  for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; }
-            }
-         }
-      }
-      stbi__cleanup_jpeg(z);
-      *out_x = z->s->img_x;
-      *out_y = z->s->img_y;
-      if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
-      return output;
-   }
-}
-
-static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   unsigned char* result;
-   stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
-   if (!j) return stbi__errpuc("outofmem", "Out of memory");
-   memset(j, 0, sizeof(stbi__jpeg));
-   STBI_NOTUSED(ri);
-   j->s = s;
-   stbi__setup_jpeg(j);
-   result = load_jpeg_image(j, x,y,comp,req_comp);
-   STBI_FREE(j);
-   return result;
-}
-
-static int stbi__jpeg_test(stbi__context *s)
-{
-   int r;
-   stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
-   if (!j) return stbi__err("outofmem", "Out of memory");
-   memset(j, 0, sizeof(stbi__jpeg));
-   j->s = s;
-   stbi__setup_jpeg(j);
-   r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
-   stbi__rewind(s);
-   STBI_FREE(j);
-   return r;
-}
-
-static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp)
-{
-   if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
-      stbi__rewind( j->s );
-      return 0;
-   }
-   if (x) *x = j->s->img_x;
-   if (y) *y = j->s->img_y;
-   if (comp) *comp = j->s->img_n >= 3 ? 3 : 1;
-   return 1;
-}
-
-static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int result;
-   stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
-   if (!j) return stbi__err("outofmem", "Out of memory");
-   memset(j, 0, sizeof(stbi__jpeg));
-   j->s = s;
-   result = stbi__jpeg_info_raw(j, x, y, comp);
-   STBI_FREE(j);
-   return result;
-}
-#endif
-
-// public domain zlib decode    v0.2  Sean Barrett 2006-11-18
-//    simple implementation
-//      - all input must be provided in an upfront buffer
-//      - all output is written to a single output buffer (can malloc/realloc)
-//    performance
-//      - fast huffman
-
-#ifndef STBI_NO_ZLIB
-
-// fast-way is faster to check than jpeg huffman, but slow way is slower
-#define STBI__ZFAST_BITS  9 // accelerate all cases in default tables
-#define STBI__ZFAST_MASK  ((1 << STBI__ZFAST_BITS) - 1)
-#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet
-
-// zlib-style huffman encoding
-// (jpegs packs from left, zlib from right, so can't share code)
-typedef struct
-{
-   stbi__uint16 fast[1 << STBI__ZFAST_BITS];
-   stbi__uint16 firstcode[16];
-   int maxcode[17];
-   stbi__uint16 firstsymbol[16];
-   stbi_uc  size[STBI__ZNSYMS];
-   stbi__uint16 value[STBI__ZNSYMS];
-} stbi__zhuffman;
-
-stbi_inline static int stbi__bitreverse16(int n)
-{
-  n = ((n & 0xAAAA) >>  1) | ((n & 0x5555) << 1);
-  n = ((n & 0xCCCC) >>  2) | ((n & 0x3333) << 2);
-  n = ((n & 0xF0F0) >>  4) | ((n & 0x0F0F) << 4);
-  n = ((n & 0xFF00) >>  8) | ((n & 0x00FF) << 8);
-  return n;
-}
-
-stbi_inline static int stbi__bit_reverse(int v, int bits)
-{
-   STBI_ASSERT(bits <= 16);
-   // to bit reverse n bits, reverse 16 and shift
-   // e.g. 11 bits, bit reverse and shift away 5
-   return stbi__bitreverse16(v) >> (16-bits);
-}
-
-static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num)
-{
-   int i,k=0;
-   int code, next_code[16], sizes[17];
-
-   // DEFLATE spec for generating codes
-   memset(sizes, 0, sizeof(sizes));
-   memset(z->fast, 0, sizeof(z->fast));
-   for (i=0; i < num; ++i)
-      ++sizes[sizelist[i]];
-   sizes[0] = 0;
-   for (i=1; i < 16; ++i)
-      if (sizes[i] > (1 << i))
-         return stbi__err("bad sizes", "Corrupt PNG");
-   code = 0;
-   for (i=1; i < 16; ++i) {
-      next_code[i] = code;
-      z->firstcode[i] = (stbi__uint16) code;
-      z->firstsymbol[i] = (stbi__uint16) k;
-      code = (code + sizes[i]);
-      if (sizes[i])
-         if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG");
-      z->maxcode[i] = code << (16-i); // preshift for inner loop
-      code <<= 1;
-      k += sizes[i];
-   }
-   z->maxcode[16] = 0x10000; // sentinel
-   for (i=0; i < num; ++i) {
-      int s = sizelist[i];
-      if (s) {
-         int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
-         stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i);
-         z->size [c] = (stbi_uc     ) s;
-         z->value[c] = (stbi__uint16) i;
-         if (s <= STBI__ZFAST_BITS) {
-            int j = stbi__bit_reverse(next_code[s],s);
-            while (j < (1 << STBI__ZFAST_BITS)) {
-               z->fast[j] = fastv;
-               j += (1 << s);
-            }
-         }
-         ++next_code[s];
-      }
-   }
-   return 1;
-}
-
-// zlib-from-memory implementation for PNG reading
-//    because PNG allows splitting the zlib stream arbitrarily,
-//    and it's annoying structurally to have PNG call ZLIB call PNG,
-//    we require PNG read all the IDATs and combine them into a single
-//    memory buffer
-
-typedef struct
-{
-   stbi_uc *zbuffer, *zbuffer_end;
-   int num_bits;
-   int hit_zeof_once;
-   stbi__uint32 code_buffer;
-
-   char *zout;
-   char *zout_start;
-   char *zout_end;
-   int   z_expandable;
-
-   stbi__zhuffman z_length, z_distance;
-} stbi__zbuf;
-
-stbi_inline static int stbi__zeof(stbi__zbuf *z)
-{
-   return (z->zbuffer >= z->zbuffer_end);
-}
-
-stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
-{
-   return stbi__zeof(z) ? 0 : *z->zbuffer++;
-}
-
-static void stbi__fill_bits(stbi__zbuf *z)
-{
-   do {
-      if (z->code_buffer >= (1U << z->num_bits)) {
-        z->zbuffer = z->zbuffer_end;  /* treat this as EOF so we fail. */
-        return;
-      }
-      z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits;
-      z->num_bits += 8;
-   } while (z->num_bits <= 24);
-}
-
-stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n)
-{
-   unsigned int k;
-   if (z->num_bits < n) stbi__fill_bits(z);
-   k = z->code_buffer & ((1 << n) - 1);
-   z->code_buffer >>= n;
-   z->num_bits -= n;
-   return k;
-}
-
-static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z)
-{
-   int b,s,k;
-   // not resolved by fast table, so compute it the slow way
-   // use jpeg approach, which requires MSbits at top
-   k = stbi__bit_reverse(a->code_buffer, 16);
-   for (s=STBI__ZFAST_BITS+1; ; ++s)
-      if (k < z->maxcode[s])
-         break;
-   if (s >= 16) return -1; // invalid code!
-   // code size is s, so:
-   b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
-   if (b >= STBI__ZNSYMS) return -1; // some data was corrupt somewhere!
-   if (z->size[b] != s) return -1;  // was originally an assert, but report failure instead.
-   a->code_buffer >>= s;
-   a->num_bits -= s;
-   return z->value[b];
-}
-
-stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z)
-{
-   int b,s;
-   if (a->num_bits < 16) {
-      if (stbi__zeof(a)) {
-         if (!a->hit_zeof_once) {
-            // This is the first time we hit eof, insert 16 extra padding btis
-            // to allow us to keep going; if we actually consume any of them
-            // though, that is invalid data. This is caught later.
-            a->hit_zeof_once = 1;
-            a->num_bits += 16; // add 16 implicit zero bits
-         } else {
-            // We already inserted our extra 16 padding bits and are again
-            // out, this stream is actually prematurely terminated.
-            return -1;
-         }
-      } else {
-         stbi__fill_bits(a);
-      }
-   }
-   b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
-   if (b) {
-      s = b >> 9;
-      a->code_buffer >>= s;
-      a->num_bits -= s;
-      return b & 511;
-   }
-   return stbi__zhuffman_decode_slowpath(a, z);
-}
-
-static int stbi__zexpand(stbi__zbuf *z, char *zout, int n)  // need to make room for n bytes
-{
-   char *q;
-   unsigned int cur, limit, old_limit;
-   z->zout = zout;
-   if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG");
-   cur   = (unsigned int) (z->zout - z->zout_start);
-   limit = old_limit = (unsigned) (z->zout_end - z->zout_start);
-   if (UINT_MAX - cur < (unsigned) n) return stbi__err("outofmem", "Out of memory");
-   while (cur + n > limit) {
-      if(limit > UINT_MAX / 2) return stbi__err("outofmem", "Out of memory");
-      limit *= 2;
-   }
-   q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
-   STBI_NOTUSED(old_limit);
-   if (q == NULL) return stbi__err("outofmem", "Out of memory");
-   z->zout_start = q;
-   z->zout       = q + cur;
-   z->zout_end   = q + limit;
-   return 1;
-}
-
-static const int stbi__zlength_base[31] = {
-   3,4,5,6,7,8,9,10,11,13,
-   15,17,19,23,27,31,35,43,51,59,
-   67,83,99,115,131,163,195,227,258,0,0 };
-
-static const int stbi__zlength_extra[31]=
-{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
-
-static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
-257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
-
-static const int stbi__zdist_extra[32] =
-{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
-
-static int stbi__parse_huffman_block(stbi__zbuf *a)
-{
-   char *zout = a->zout;
-   for(;;) {
-      int z = stbi__zhuffman_decode(a, &a->z_length);
-      if (z < 256) {
-         if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes
-         if (zout >= a->zout_end) {
-            if (!stbi__zexpand(a, zout, 1)) return 0;
-            zout = a->zout;
-         }
-         *zout++ = (char) z;
-      } else {
-         stbi_uc *p;
-         int len,dist;
-         if (z == 256) {
-            a->zout = zout;
-            if (a->hit_zeof_once && a->num_bits < 16) {
-               // The first time we hit zeof, we inserted 16 extra zero bits into our bit
-               // buffer so the decoder can just do its speculative decoding. But if we
-               // actually consumed any of those bits (which is the case when num_bits < 16),
-               // the stream actually read past the end so it is malformed.
-               return stbi__err("unexpected end","Corrupt PNG");
-            }
-            return 1;
-         }
-         if (z >= 286) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, length codes 286 and 287 must not appear in compressed data
-         z -= 257;
-         len = stbi__zlength_base[z];
-         if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]);
-         z = stbi__zhuffman_decode(a, &a->z_distance);
-         if (z < 0 || z >= 30) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, distance codes 30 and 31 must not appear in compressed data
-         dist = stbi__zdist_base[z];
-         if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]);
-         if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG");
-         if (len > a->zout_end - zout) {
-            if (!stbi__zexpand(a, zout, len)) return 0;
-            zout = a->zout;
-         }
-         p = (stbi_uc *) (zout - dist);
-         if (dist == 1) { // run of one byte; common in images.
-            stbi_uc v = *p;
-            if (len) { do *zout++ = v; while (--len); }
-         } else {
-            if (len) { do *zout++ = *p++; while (--len); }
-         }
-      }
-   }
-}
-
-static int stbi__compute_huffman_codes(stbi__zbuf *a)
-{
-   static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
-   stbi__zhuffman z_codelength;
-   stbi_uc lencodes[286+32+137];//padding for maximum single op
-   stbi_uc codelength_sizes[19];
-   int i,n;
-
-   int hlit  = stbi__zreceive(a,5) + 257;
-   int hdist = stbi__zreceive(a,5) + 1;
-   int hclen = stbi__zreceive(a,4) + 4;
-   int ntot  = hlit + hdist;
-
-   memset(codelength_sizes, 0, sizeof(codelength_sizes));
-   for (i=0; i < hclen; ++i) {
-      int s = stbi__zreceive(a,3);
-      codelength_sizes[length_dezigzag[i]] = (stbi_uc) s;
-   }
-   if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
-
-   n = 0;
-   while (n < ntot) {
-      int c = stbi__zhuffman_decode(a, &z_codelength);
-      if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG");
-      if (c < 16)
-         lencodes[n++] = (stbi_uc) c;
-      else {
-         stbi_uc fill = 0;
-         if (c == 16) {
-            c = stbi__zreceive(a,2)+3;
-            if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG");
-            fill = lencodes[n-1];
-         } else if (c == 17) {
-            c = stbi__zreceive(a,3)+3;
-         } else if (c == 18) {
-            c = stbi__zreceive(a,7)+11;
-         } else {
-            return stbi__err("bad codelengths", "Corrupt PNG");
-         }
-         if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG");
-         memset(lencodes+n, fill, c);
-         n += c;
-      }
-   }
-   if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG");
-   if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0;
-   if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0;
-   return 1;
-}
-
-static int stbi__parse_uncompressed_block(stbi__zbuf *a)
-{
-   stbi_uc header[4];
-   int len,nlen,k;
-   if (a->num_bits & 7)
-      stbi__zreceive(a, a->num_bits & 7); // discard
-   // drain the bit-packed data into header
-   k = 0;
-   while (a->num_bits > 0) {
-      header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check
-      a->code_buffer >>= 8;
-      a->num_bits -= 8;
-   }
-   if (a->num_bits < 0) return stbi__err("zlib corrupt","Corrupt PNG");
-   // now fill header the normal way
-   while (k < 4)
-      header[k++] = stbi__zget8(a);
-   len  = header[1] * 256 + header[0];
-   nlen = header[3] * 256 + header[2];
-   if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG");
-   if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG");
-   if (a->zout + len > a->zout_end)
-      if (!stbi__zexpand(a, a->zout, len)) return 0;
-   memcpy(a->zout, a->zbuffer, len);
-   a->zbuffer += len;
-   a->zout += len;
-   return 1;
-}
-
-static int stbi__parse_zlib_header(stbi__zbuf *a)
-{
-   int cmf   = stbi__zget8(a);
-   int cm    = cmf & 15;
-   /* int cinfo = cmf >> 4; */
-   int flg   = stbi__zget8(a);
-   if (stbi__zeof(a)) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
-   if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
-   if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
-   if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png
-   // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
-   return 1;
-}
-
-static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] =
-{
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
-   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
-   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
-   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
-   7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8
-};
-static const stbi_uc stbi__zdefault_distance[32] =
-{
-   5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
-};
-/*
-Init algorithm:
-{
-   int i;   // use <= to match clearly with spec
-   for (i=0; i <= 143; ++i)     stbi__zdefault_length[i]   = 8;
-   for (   ; i <= 255; ++i)     stbi__zdefault_length[i]   = 9;
-   for (   ; i <= 279; ++i)     stbi__zdefault_length[i]   = 7;
-   for (   ; i <= 287; ++i)     stbi__zdefault_length[i]   = 8;
-
-   for (i=0; i <=  31; ++i)     stbi__zdefault_distance[i] = 5;
-}
-*/
-
-static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
-{
-   int final, type;
-   if (parse_header)
-      if (!stbi__parse_zlib_header(a)) return 0;
-   a->num_bits = 0;
-   a->code_buffer = 0;
-   a->hit_zeof_once = 0;
-   do {
-      final = stbi__zreceive(a,1);
-      type = stbi__zreceive(a,2);
-      if (type == 0) {
-         if (!stbi__parse_uncompressed_block(a)) return 0;
-      } else if (type == 3) {
-         return 0;
-      } else {
-         if (type == 1) {
-            // use fixed code lengths
-            if (!stbi__zbuild_huffman(&a->z_length  , stbi__zdefault_length  , STBI__ZNSYMS)) return 0;
-            if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance,  32)) return 0;
-         } else {
-            if (!stbi__compute_huffman_codes(a)) return 0;
-         }
-         if (!stbi__parse_huffman_block(a)) return 0;
-      }
-   } while (!final);
-   return 1;
-}
-
-static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header)
-{
-   a->zout_start = obuf;
-   a->zout       = obuf;
-   a->zout_end   = obuf + olen;
-   a->z_expandable = exp;
-
-   return stbi__parse_zlib(a, parse_header);
-}
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen)
-{
-   stbi__zbuf a;
-   char *p = (char *) stbi__malloc(initial_size);
-   if (p == NULL) return NULL;
-   a.zbuffer = (stbi_uc *) buffer;
-   a.zbuffer_end = (stbi_uc *) buffer + len;
-   if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
-      if (outlen) *outlen = (int) (a.zout - a.zout_start);
-      return a.zout_start;
-   } else {
-      STBI_FREE(a.zout_start);
-      return NULL;
-   }
-}
-
-STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
-{
-   return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
-}
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header)
-{
-   stbi__zbuf a;
-   char *p = (char *) stbi__malloc(initial_size);
-   if (p == NULL) return NULL;
-   a.zbuffer = (stbi_uc *) buffer;
-   a.zbuffer_end = (stbi_uc *) buffer + len;
-   if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
-      if (outlen) *outlen = (int) (a.zout - a.zout_start);
-      return a.zout_start;
-   } else {
-      STBI_FREE(a.zout_start);
-      return NULL;
-   }
-}
-
-STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
-{
-   stbi__zbuf a;
-   a.zbuffer = (stbi_uc *) ibuffer;
-   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
-   if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
-      return (int) (a.zout - a.zout_start);
-   else
-      return -1;
-}
-
-STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
-{
-   stbi__zbuf a;
-   char *p = (char *) stbi__malloc(16384);
-   if (p == NULL) return NULL;
-   a.zbuffer = (stbi_uc *) buffer;
-   a.zbuffer_end = (stbi_uc *) buffer+len;
-   if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
-      if (outlen) *outlen = (int) (a.zout - a.zout_start);
-      return a.zout_start;
-   } else {
-      STBI_FREE(a.zout_start);
-      return NULL;
-   }
-}
-
-STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
-{
-   stbi__zbuf a;
-   a.zbuffer = (stbi_uc *) ibuffer;
-   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
-   if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
-      return (int) (a.zout - a.zout_start);
-   else
-      return -1;
-}
-#endif
-
-// public domain "baseline" PNG decoder   v0.10  Sean Barrett 2006-11-18
-//    simple implementation
-//      - only 8-bit samples
-//      - no CRC checking
-//      - allocates lots of intermediate memory
-//        - avoids problem of streaming data between subsystems
-//        - avoids explicit window management
-//    performance
-//      - uses stb_zlib, a PD zlib implementation with fast huffman decoding
-
-#ifndef STBI_NO_PNG
-typedef struct
-{
-   stbi__uint32 length;
-   stbi__uint32 type;
-} stbi__pngchunk;
-
-static stbi__pngchunk stbi__get_chunk_header(stbi__context *s)
-{
-   stbi__pngchunk c;
-   c.length = stbi__get32be(s);
-   c.type   = stbi__get32be(s);
-   return c;
-}
-
-static int stbi__check_png_header(stbi__context *s)
-{
-   static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 };
-   int i;
-   for (i=0; i < 8; ++i)
-      if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG");
-   return 1;
-}
-
-typedef struct
-{
-   stbi__context *s;
-   stbi_uc *idata, *expanded, *out;
-   int depth;
-} stbi__png;
-
-
-enum {
-   STBI__F_none=0,
-   STBI__F_sub=1,
-   STBI__F_up=2,
-   STBI__F_avg=3,
-   STBI__F_paeth=4,
-   // synthetic filter used for first scanline to avoid needing a dummy row of 0s
-   STBI__F_avg_first
-};
-
-static stbi_uc first_row_filter[5] =
-{
-   STBI__F_none,
-   STBI__F_sub,
-   STBI__F_none,
-   STBI__F_avg_first,
-   STBI__F_sub // Paeth with b=c=0 turns out to be equivalent to sub
-};
-
-static int stbi__paeth(int a, int b, int c)
-{
-   // This formulation looks very different from the reference in the PNG spec, but is
-   // actually equivalent and has favorable data dependencies and admits straightforward
-   // generation of branch-free code, which helps performance significantly.
-   int thresh = c*3 - (a + b);
-   int lo = a < b ? a : b;
-   int hi = a < b ? b : a;
-   int t0 = (hi <= thresh) ? lo : c;
-   int t1 = (thresh <= lo) ? hi : t0;
-   return t1;
-}
-
-static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 };
-
-// adds an extra all-255 alpha channel
-// dest == src is legal
-// img_n must be 1 or 3
-static void stbi__create_png_alpha_expand8(stbi_uc *dest, stbi_uc *src, stbi__uint32 x, int img_n)
-{
-   int i;
-   // must process data backwards since we allow dest==src
-   if (img_n == 1) {
-      for (i=x-1; i >= 0; --i) {
-         dest[i*2+1] = 255;
-         dest[i*2+0] = src[i];
-      }
-   } else {
-      STBI_ASSERT(img_n == 3);
-      for (i=x-1; i >= 0; --i) {
-         dest[i*4+3] = 255;
-         dest[i*4+2] = src[i*3+2];
-         dest[i*4+1] = src[i*3+1];
-         dest[i*4+0] = src[i*3+0];
-      }
-   }
-}
-
-// create the png data from post-deflated data
-static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color)
-{
-   int bytes = (depth == 16 ? 2 : 1);
-   stbi__context *s = a->s;
-   stbi__uint32 i,j,stride = x*out_n*bytes;
-   stbi__uint32 img_len, img_width_bytes;
-   stbi_uc *filter_buf;
-   int all_ok = 1;
-   int k;
-   int img_n = s->img_n; // copy it into a local for later
-
-   int output_bytes = out_n*bytes;
-   int filter_bytes = img_n*bytes;
-   int width = x;
-
-   STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1);
-   a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
-   if (!a->out) return stbi__err("outofmem", "Out of memory");
-
-   // note: error exits here don't need to clean up a->out individually,
-   // stbi__do_png always does on error.
-   if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG");
-   img_width_bytes = (((img_n * x * depth) + 7) >> 3);
-   if (!stbi__mad2sizes_valid(img_width_bytes, y, img_width_bytes)) return stbi__err("too large", "Corrupt PNG");
-   img_len = (img_width_bytes + 1) * y;
-
-   // we used to check for exact match between raw_len and img_len on non-interlaced PNGs,
-   // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros),
-   // so just check for raw_len < img_len always.
-   if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG");
-
-   // Allocate two scan lines worth of filter workspace buffer.
-   filter_buf = (stbi_uc *) stbi__malloc_mad2(img_width_bytes, 2, 0);
-   if (!filter_buf) return stbi__err("outofmem", "Out of memory");
-
-   // Filtering for low-bit-depth images
-   if (depth < 8) {
-      filter_bytes = 1;
-      width = img_width_bytes;
-   }
-
-   for (j=0; j < y; ++j) {
-      // cur/prior filter buffers alternate
-      stbi_uc *cur = filter_buf + (j & 1)*img_width_bytes;
-      stbi_uc *prior = filter_buf + (~j & 1)*img_width_bytes;
-      stbi_uc *dest = a->out + stride*j;
-      int nk = width * filter_bytes;
-      int filter = *raw++;
-
-      // check filter type
-      if (filter > 4) {
-         all_ok = stbi__err("invalid filter","Corrupt PNG");
-         break;
-      }
-
-      // if first row, use special filter that doesn't sample previous row
-      if (j == 0) filter = first_row_filter[filter];
-
-      // perform actual filtering
-      switch (filter) {
-      case STBI__F_none:
-         memcpy(cur, raw, nk);
-         break;
-      case STBI__F_sub:
-         memcpy(cur, raw, filter_bytes);
-         for (k = filter_bytes; k < nk; ++k)
-            cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]);
-         break;
-      case STBI__F_up:
-         for (k = 0; k < nk; ++k)
-            cur[k] = STBI__BYTECAST(raw[k] + prior[k]);
-         break;
-      case STBI__F_avg:
-         for (k = 0; k < filter_bytes; ++k)
-            cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1));
-         for (k = filter_bytes; k < nk; ++k)
-            cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1));
-         break;
-      case STBI__F_paeth:
-         for (k = 0; k < filter_bytes; ++k)
-            cur[k] = STBI__BYTECAST(raw[k] + prior[k]); // prior[k] == stbi__paeth(0,prior[k],0)
-         for (k = filter_bytes; k < nk; ++k)
-            cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes], prior[k], prior[k-filter_bytes]));
-         break;
-      case STBI__F_avg_first:
-         memcpy(cur, raw, filter_bytes);
-         for (k = filter_bytes; k < nk; ++k)
-            cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1));
-         break;
-      }
-
-      raw += nk;
-
-      // expand decoded bits in cur to dest, also adding an extra alpha channel if desired
-      if (depth < 8) {
-         stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
-         stbi_uc *in = cur;
-         stbi_uc *out = dest;
-         stbi_uc inb = 0;
-         stbi__uint32 nsmp = x*img_n;
-
-         // expand bits to bytes first
-         if (depth == 4) {
-            for (i=0; i < nsmp; ++i) {
-               if ((i & 1) == 0) inb = *in++;
-               *out++ = scale * (inb >> 4);
-               inb <<= 4;
-            }
-         } else if (depth == 2) {
-            for (i=0; i < nsmp; ++i) {
-               if ((i & 3) == 0) inb = *in++;
-               *out++ = scale * (inb >> 6);
-               inb <<= 2;
-            }
-         } else {
-            STBI_ASSERT(depth == 1);
-            for (i=0; i < nsmp; ++i) {
-               if ((i & 7) == 0) inb = *in++;
-               *out++ = scale * (inb >> 7);
-               inb <<= 1;
-            }
-         }
-
-         // insert alpha=255 values if desired
-         if (img_n != out_n)
-            stbi__create_png_alpha_expand8(dest, dest, x, img_n);
-      } else if (depth == 8) {
-         if (img_n == out_n)
-            memcpy(dest, cur, x*img_n);
-         else
-            stbi__create_png_alpha_expand8(dest, cur, x, img_n);
-      } else if (depth == 16) {
-         // convert the image data from big-endian to platform-native
-         stbi__uint16 *dest16 = (stbi__uint16*)dest;
-         stbi__uint32 nsmp = x*img_n;
-
-         if (img_n == out_n) {
-            for (i = 0; i < nsmp; ++i, ++dest16, cur += 2)
-               *dest16 = (cur[0] << 8) | cur[1];
-         } else {
-            STBI_ASSERT(img_n+1 == out_n);
-            if (img_n == 1) {
-               for (i = 0; i < x; ++i, dest16 += 2, cur += 2) {
-                  dest16[0] = (cur[0] << 8) | cur[1];
-                  dest16[1] = 0xffff;
-               }
-            } else {
-               STBI_ASSERT(img_n == 3);
-               for (i = 0; i < x; ++i, dest16 += 4, cur += 6) {
-                  dest16[0] = (cur[0] << 8) | cur[1];
-                  dest16[1] = (cur[2] << 8) | cur[3];
-                  dest16[2] = (cur[4] << 8) | cur[5];
-                  dest16[3] = 0xffff;
-               }
-            }
-         }
-      }
-   }
-
-   STBI_FREE(filter_buf);
-   if (!all_ok) return 0;
-
-   return 1;
-}
-
-static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced)
-{
-   int bytes = (depth == 16 ? 2 : 1);
-   int out_bytes = out_n * bytes;
-   stbi_uc *final;
-   int p;
-   if (!interlaced)
-      return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
-
-   // de-interlacing
-   final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
-   if (!final) return stbi__err("outofmem", "Out of memory");
-   for (p=0; p < 7; ++p) {
-      int xorig[] = { 0,4,0,2,0,1,0 };
-      int yorig[] = { 0,0,4,0,2,0,1 };
-      int xspc[]  = { 8,8,4,4,2,2,1 };
-      int yspc[]  = { 8,8,8,4,4,2,2 };
-      int i,j,x,y;
-      // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
-      x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p];
-      y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p];
-      if (x && y) {
-         stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
-         if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
-            STBI_FREE(final);
-            return 0;
-         }
-         for (j=0; j < y; ++j) {
-            for (i=0; i < x; ++i) {
-               int out_y = j*yspc[p]+yorig[p];
-               int out_x = i*xspc[p]+xorig[p];
-               memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes,
-                      a->out + (j*x+i)*out_bytes, out_bytes);
-            }
-         }
-         STBI_FREE(a->out);
-         image_data += img_len;
-         image_data_len -= img_len;
-      }
-   }
-   a->out = final;
-
-   return 1;
-}
-
-static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
-{
-   stbi__context *s = z->s;
-   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-   stbi_uc *p = z->out;
-
-   // compute color-based transparency, assuming we've
-   // already got 255 as the alpha value in the output
-   STBI_ASSERT(out_n == 2 || out_n == 4);
-
-   if (out_n == 2) {
-      for (i=0; i < pixel_count; ++i) {
-         p[1] = (p[0] == tc[0] ? 0 : 255);
-         p += 2;
-      }
-   } else {
-      for (i=0; i < pixel_count; ++i) {
-         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
-            p[3] = 0;
-         p += 4;
-      }
-   }
-   return 1;
-}
-
-static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n)
-{
-   stbi__context *s = z->s;
-   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-   stbi__uint16 *p = (stbi__uint16*) z->out;
-
-   // compute color-based transparency, assuming we've
-   // already got 65535 as the alpha value in the output
-   STBI_ASSERT(out_n == 2 || out_n == 4);
-
-   if (out_n == 2) {
-      for (i = 0; i < pixel_count; ++i) {
-         p[1] = (p[0] == tc[0] ? 0 : 65535);
-         p += 2;
-      }
-   } else {
-      for (i = 0; i < pixel_count; ++i) {
-         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
-            p[3] = 0;
-         p += 4;
-      }
-   }
-   return 1;
-}
-
-static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n)
-{
-   stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
-   stbi_uc *p, *temp_out, *orig = a->out;
-
-   p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0);
-   if (p == NULL) return stbi__err("outofmem", "Out of memory");
-
-   // between here and free(out) below, exitting would leak
-   temp_out = p;
-
-   if (pal_img_n == 3) {
-      for (i=0; i < pixel_count; ++i) {
-         int n = orig[i]*4;
-         p[0] = palette[n  ];
-         p[1] = palette[n+1];
-         p[2] = palette[n+2];
-         p += 3;
-      }
-   } else {
-      for (i=0; i < pixel_count; ++i) {
-         int n = orig[i]*4;
-         p[0] = palette[n  ];
-         p[1] = palette[n+1];
-         p[2] = palette[n+2];
-         p[3] = palette[n+3];
-         p += 4;
-      }
-   }
-   STBI_FREE(a->out);
-   a->out = temp_out;
-
-   STBI_NOTUSED(len);
-
-   return 1;
-}
-
-static int stbi__unpremultiply_on_load_global = 0;
-static int stbi__de_iphone_flag_global = 0;
-
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
-{
-   stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply;
-}
-
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
-{
-   stbi__de_iphone_flag_global = flag_true_if_should_convert;
-}
-
-#ifndef STBI_THREAD_LOCAL
-#define stbi__unpremultiply_on_load  stbi__unpremultiply_on_load_global
-#define stbi__de_iphone_flag  stbi__de_iphone_flag_global
-#else
-static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set;
-static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set;
-
-STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply)
-{
-   stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply;
-   stbi__unpremultiply_on_load_set = 1;
-}
-
-STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert)
-{
-   stbi__de_iphone_flag_local = flag_true_if_should_convert;
-   stbi__de_iphone_flag_set = 1;
-}
-
-#define stbi__unpremultiply_on_load  (stbi__unpremultiply_on_load_set           \
-                                       ? stbi__unpremultiply_on_load_local      \
-                                       : stbi__unpremultiply_on_load_global)
-#define stbi__de_iphone_flag  (stbi__de_iphone_flag_set                         \
-                                ? stbi__de_iphone_flag_local                    \
-                                : stbi__de_iphone_flag_global)
-#endif // STBI_THREAD_LOCAL
-
-static void stbi__de_iphone(stbi__png *z)
-{
-   stbi__context *s = z->s;
-   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-   stbi_uc *p = z->out;
-
-   if (s->img_out_n == 3) {  // convert bgr to rgb
-      for (i=0; i < pixel_count; ++i) {
-         stbi_uc t = p[0];
-         p[0] = p[2];
-         p[2] = t;
-         p += 3;
-      }
-   } else {
-      STBI_ASSERT(s->img_out_n == 4);
-      if (stbi__unpremultiply_on_load) {
-         // convert bgr to rgb and unpremultiply
-         for (i=0; i < pixel_count; ++i) {
-            stbi_uc a = p[3];
-            stbi_uc t = p[0];
-            if (a) {
-               stbi_uc half = a / 2;
-               p[0] = (p[2] * 255 + half) / a;
-               p[1] = (p[1] * 255 + half) / a;
-               p[2] = ( t   * 255 + half) / a;
-            } else {
-               p[0] = p[2];
-               p[2] = t;
-            }
-            p += 4;
-         }
-      } else {
-         // convert bgr to rgb
-         for (i=0; i < pixel_count; ++i) {
-            stbi_uc t = p[0];
-            p[0] = p[2];
-            p[2] = t;
-            p += 4;
-         }
-      }
-   }
-}
-
-#define STBI__PNG_TYPE(a,b,c,d)  (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d))
-
-static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
-{
-   stbi_uc palette[1024], pal_img_n=0;
-   stbi_uc has_trans=0, tc[3]={0};
-   stbi__uint16 tc16[3];
-   stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0;
-   int first=1,k,interlace=0, color=0, is_iphone=0;
-   stbi__context *s = z->s;
-
-   z->expanded = NULL;
-   z->idata = NULL;
-   z->out = NULL;
-
-   if (!stbi__check_png_header(s)) return 0;
-
-   if (scan == STBI__SCAN_type) return 1;
-
-   for (;;) {
-      stbi__pngchunk c = stbi__get_chunk_header(s);
-      switch (c.type) {
-         case STBI__PNG_TYPE('C','g','B','I'):
-            is_iphone = 1;
-            stbi__skip(s, c.length);
-            break;
-         case STBI__PNG_TYPE('I','H','D','R'): {
-            int comp,filter;
-            if (!first) return stbi__err("multiple IHDR","Corrupt PNG");
-            first = 0;
-            if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG");
-            s->img_x = stbi__get32be(s);
-            s->img_y = stbi__get32be(s);
-            if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-            if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-            z->depth = stbi__get8(s);  if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16)  return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only");
-            color = stbi__get8(s);  if (color > 6)         return stbi__err("bad ctype","Corrupt PNG");
-            if (color == 3 && z->depth == 16)                  return stbi__err("bad ctype","Corrupt PNG");
-            if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG");
-            comp  = stbi__get8(s);  if (comp) return stbi__err("bad comp method","Corrupt PNG");
-            filter= stbi__get8(s);  if (filter) return stbi__err("bad filter method","Corrupt PNG");
-            interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG");
-            if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG");
-            if (!pal_img_n) {
-               s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
-               if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode");
-            } else {
-               // if paletted, then pal_n is our final components, and
-               // img_n is # components to decompress/filter.
-               s->img_n = 1;
-               if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG");
-            }
-            // even with SCAN_header, have to scan to see if we have a tRNS
-            break;
-         }
-
-         case STBI__PNG_TYPE('P','L','T','E'):  {
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG");
-            pal_len = c.length / 3;
-            if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG");
-            for (i=0; i < pal_len; ++i) {
-               palette[i*4+0] = stbi__get8(s);
-               palette[i*4+1] = stbi__get8(s);
-               palette[i*4+2] = stbi__get8(s);
-               palette[i*4+3] = 255;
-            }
-            break;
-         }
-
-         case STBI__PNG_TYPE('t','R','N','S'): {
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG");
-            if (pal_img_n) {
-               if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; }
-               if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG");
-               if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG");
-               pal_img_n = 4;
-               for (i=0; i < c.length; ++i)
-                  palette[i*4+3] = stbi__get8(s);
-            } else {
-               if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG");
-               if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG");
-               has_trans = 1;
-               // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now.
-               if (scan == STBI__SCAN_header) { ++s->img_n; return 1; }
-               if (z->depth == 16) {
-                  for (k = 0; k < s->img_n && k < 3; ++k) // extra loop test to suppress false GCC warning
-                     tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
-               } else {
-                  for (k = 0; k < s->img_n && k < 3; ++k)
-                     tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
-               }
-            }
-            break;
-         }
-
-         case STBI__PNG_TYPE('I','D','A','T'): {
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG");
-            if (scan == STBI__SCAN_header) {
-               // header scan definitely stops at first IDAT
-               if (pal_img_n)
-                  s->img_n = pal_img_n;
-               return 1;
-            }
-            if (c.length > (1u << 30)) return stbi__err("IDAT size limit", "IDAT section larger than 2^30 bytes");
-            if ((int)(ioff + c.length) < (int)ioff) return 0;
-            if (ioff + c.length > idata_limit) {
-               stbi__uint32 idata_limit_old = idata_limit;
-               stbi_uc *p;
-               if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
-               while (ioff + c.length > idata_limit)
-                  idata_limit *= 2;
-               STBI_NOTUSED(idata_limit_old);
-               p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory");
-               z->idata = p;
-            }
-            if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG");
-            ioff += c.length;
-            break;
-         }
-
-         case STBI__PNG_TYPE('I','E','N','D'): {
-            stbi__uint32 raw_len, bpl;
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (scan != STBI__SCAN_load) return 1;
-            if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG");
-            // initial guess for decoded data size to avoid unnecessary reallocs
-            bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
-            raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */;
-            z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone);
-            if (z->expanded == NULL) return 0; // zlib should set error
-            STBI_FREE(z->idata); z->idata = NULL;
-            if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans)
-               s->img_out_n = s->img_n+1;
-            else
-               s->img_out_n = s->img_n;
-            if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0;
-            if (has_trans) {
-               if (z->depth == 16) {
-                  if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0;
-               } else {
-                  if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0;
-               }
-            }
-            if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
-               stbi__de_iphone(z);
-            if (pal_img_n) {
-               // pal_img_n == 3 or 4
-               s->img_n = pal_img_n; // record the actual colors we had
-               s->img_out_n = pal_img_n;
-               if (req_comp >= 3) s->img_out_n = req_comp;
-               if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
-                  return 0;
-            } else if (has_trans) {
-               // non-paletted image with tRNS -> source image has (constant) alpha
-               ++s->img_n;
-            }
-            STBI_FREE(z->expanded); z->expanded = NULL;
-            // end of PNG chunk, read and skip CRC
-            stbi__get32be(s);
-            return 1;
-         }
-
-         default:
-            // if critical, fail
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if ((c.type & (1 << 29)) == 0) {
-               #ifndef STBI_NO_FAILURE_STRINGS
-               // not threadsafe
-               static char invalid_chunk[] = "XXXX PNG chunk not known";
-               invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
-               invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
-               invalid_chunk[2] = STBI__BYTECAST(c.type >>  8);
-               invalid_chunk[3] = STBI__BYTECAST(c.type >>  0);
-               #endif
-               return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
-            }
-            stbi__skip(s, c.length);
-            break;
-      }
-      // end of PNG chunk, read and skip CRC
-      stbi__get32be(s);
-   }
-}
-
-static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri)
-{
-   void *result=NULL;
-   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
-   if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
-      if (p->depth <= 8)
-         ri->bits_per_channel = 8;
-      else if (p->depth == 16)
-         ri->bits_per_channel = 16;
-      else
-         return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth");
-      result = p->out;
-      p->out = NULL;
-      if (req_comp && req_comp != p->s->img_out_n) {
-         if (ri->bits_per_channel == 8)
-            result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
-         else
-            result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
-         p->s->img_out_n = req_comp;
-         if (result == NULL) return result;
-      }
-      *x = p->s->img_x;
-      *y = p->s->img_y;
-      if (n) *n = p->s->img_n;
-   }
-   STBI_FREE(p->out);      p->out      = NULL;
-   STBI_FREE(p->expanded); p->expanded = NULL;
-   STBI_FREE(p->idata);    p->idata    = NULL;
-
-   return result;
-}
-
-static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi__png p;
-   p.s = s;
-   return stbi__do_png(&p, x,y,comp,req_comp, ri);
-}
-
-static int stbi__png_test(stbi__context *s)
-{
-   int r;
-   r = stbi__check_png_header(s);
-   stbi__rewind(s);
-   return r;
-}
-
-static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp)
-{
-   if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
-      stbi__rewind( p->s );
-      return 0;
-   }
-   if (x) *x = p->s->img_x;
-   if (y) *y = p->s->img_y;
-   if (comp) *comp = p->s->img_n;
-   return 1;
-}
-
-static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   stbi__png p;
-   p.s = s;
-   return stbi__png_info_raw(&p, x, y, comp);
-}
-
-static int stbi__png_is16(stbi__context *s)
-{
-   stbi__png p;
-   p.s = s;
-   if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
-	   return 0;
-   if (p.depth != 16) {
-      stbi__rewind(p.s);
-      return 0;
-   }
-   return 1;
-}
-#endif
-
-// Microsoft/Windows BMP image
-
-#ifndef STBI_NO_BMP
-static int stbi__bmp_test_raw(stbi__context *s)
-{
-   int r;
-   int sz;
-   if (stbi__get8(s) != 'B') return 0;
-   if (stbi__get8(s) != 'M') return 0;
-   stbi__get32le(s); // discard filesize
-   stbi__get16le(s); // discard reserved
-   stbi__get16le(s); // discard reserved
-   stbi__get32le(s); // discard data offset
-   sz = stbi__get32le(s);
-   r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
-   return r;
-}
-
-static int stbi__bmp_test(stbi__context *s)
-{
-   int r = stbi__bmp_test_raw(s);
-   stbi__rewind(s);
-   return r;
-}
-
-
-// returns 0..31 for the highest set bit
-static int stbi__high_bit(unsigned int z)
-{
-   int n=0;
-   if (z == 0) return -1;
-   if (z >= 0x10000) { n += 16; z >>= 16; }
-   if (z >= 0x00100) { n +=  8; z >>=  8; }
-   if (z >= 0x00010) { n +=  4; z >>=  4; }
-   if (z >= 0x00004) { n +=  2; z >>=  2; }
-   if (z >= 0x00002) { n +=  1;/* >>=  1;*/ }
-   return n;
-}
-
-static int stbi__bitcount(unsigned int a)
-{
-   a = (a & 0x55555555) + ((a >>  1) & 0x55555555); // max 2
-   a = (a & 0x33333333) + ((a >>  2) & 0x33333333); // max 4
-   a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
-   a = (a + (a >> 8)); // max 16 per 8 bits
-   a = (a + (a >> 16)); // max 32 per 8 bits
-   return a & 0xff;
-}
-
-// extract an arbitrarily-aligned N-bit value (N=bits)
-// from v, and then make it 8-bits long and fractionally
-// extend it to full full range.
-static int stbi__shiftsigned(unsigned int v, int shift, int bits)
-{
-   static unsigned int mul_table[9] = {
-      0,
-      0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/,
-      0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/,
-   };
-   static unsigned int shift_table[9] = {
-      0, 0,0,1,0,2,4,6,0,
-   };
-   if (shift < 0)
-      v <<= -shift;
-   else
-      v >>= shift;
-   STBI_ASSERT(v < 256);
-   v >>= (8-bits);
-   STBI_ASSERT(bits >= 0 && bits <= 8);
-   return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits];
-}
-
-typedef struct
-{
-   int bpp, offset, hsz;
-   unsigned int mr,mg,mb,ma, all_a;
-   int extra_read;
-} stbi__bmp_data;
-
-static int stbi__bmp_set_mask_defaults(stbi__bmp_data *info, int compress)
-{
-   // BI_BITFIELDS specifies masks explicitly, don't override
-   if (compress == 3)
-      return 1;
-
-   if (compress == 0) {
-      if (info->bpp == 16) {
-         info->mr = 31u << 10;
-         info->mg = 31u <<  5;
-         info->mb = 31u <<  0;
-      } else if (info->bpp == 32) {
-         info->mr = 0xffu << 16;
-         info->mg = 0xffu <<  8;
-         info->mb = 0xffu <<  0;
-         info->ma = 0xffu << 24;
-         info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
-      } else {
-         // otherwise, use defaults, which is all-0
-         info->mr = info->mg = info->mb = info->ma = 0;
-      }
-      return 1;
-   }
-   return 0; // error
-}
-
-static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
-{
-   int hsz;
-   if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP");
-   stbi__get32le(s); // discard filesize
-   stbi__get16le(s); // discard reserved
-   stbi__get16le(s); // discard reserved
-   info->offset = stbi__get32le(s);
-   info->hsz = hsz = stbi__get32le(s);
-   info->mr = info->mg = info->mb = info->ma = 0;
-   info->extra_read = 14;
-
-   if (info->offset < 0) return stbi__errpuc("bad BMP", "bad BMP");
-
-   if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
-   if (hsz == 12) {
-      s->img_x = stbi__get16le(s);
-      s->img_y = stbi__get16le(s);
-   } else {
-      s->img_x = stbi__get32le(s);
-      s->img_y = stbi__get32le(s);
-   }
-   if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP");
-   info->bpp = stbi__get16le(s);
-   if (hsz != 12) {
-      int compress = stbi__get32le(s);
-      if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
-      if (compress >= 4) return stbi__errpuc("BMP JPEG/PNG", "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes
-      if (compress == 3 && info->bpp != 16 && info->bpp != 32) return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel
-      stbi__get32le(s); // discard sizeof
-      stbi__get32le(s); // discard hres
-      stbi__get32le(s); // discard vres
-      stbi__get32le(s); // discard colorsused
-      stbi__get32le(s); // discard max important
-      if (hsz == 40 || hsz == 56) {
-         if (hsz == 56) {
-            stbi__get32le(s);
-            stbi__get32le(s);
-            stbi__get32le(s);
-            stbi__get32le(s);
-         }
-         if (info->bpp == 16 || info->bpp == 32) {
-            if (compress == 0) {
-               stbi__bmp_set_mask_defaults(info, compress);
-            } else if (compress == 3) {
-               info->mr = stbi__get32le(s);
-               info->mg = stbi__get32le(s);
-               info->mb = stbi__get32le(s);
-               info->extra_read += 12;
-               // not documented, but generated by photoshop and handled by mspaint
-               if (info->mr == info->mg && info->mg == info->mb) {
-                  // ?!?!?
-                  return stbi__errpuc("bad BMP", "bad BMP");
-               }
-            } else
-               return stbi__errpuc("bad BMP", "bad BMP");
-         }
-      } else {
-         // V4/V5 header
-         int i;
-         if (hsz != 108 && hsz != 124)
-            return stbi__errpuc("bad BMP", "bad BMP");
-         info->mr = stbi__get32le(s);
-         info->mg = stbi__get32le(s);
-         info->mb = stbi__get32le(s);
-         info->ma = stbi__get32le(s);
-         if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs
-            stbi__bmp_set_mask_defaults(info, compress);
-         stbi__get32le(s); // discard color space
-         for (i=0; i < 12; ++i)
-            stbi__get32le(s); // discard color space parameters
-         if (hsz == 124) {
-            stbi__get32le(s); // discard rendering intent
-            stbi__get32le(s); // discard offset of profile data
-            stbi__get32le(s); // discard size of profile data
-            stbi__get32le(s); // discard reserved
-         }
-      }
-   }
-   return (void *) 1;
-}
-
-
-static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *out;
-   unsigned int mr=0,mg=0,mb=0,ma=0, all_a;
-   stbi_uc pal[256][4];
-   int psize=0,i,j,width;
-   int flip_vertically, pad, target;
-   stbi__bmp_data info;
-   STBI_NOTUSED(ri);
-
-   info.all_a = 255;
-   if (stbi__bmp_parse_header(s, &info) == NULL)
-      return NULL; // error code already set
-
-   flip_vertically = ((int) s->img_y) > 0;
-   s->img_y = abs((int) s->img_y);
-
-   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   mr = info.mr;
-   mg = info.mg;
-   mb = info.mb;
-   ma = info.ma;
-   all_a = info.all_a;
-
-   if (info.hsz == 12) {
-      if (info.bpp < 24)
-         psize = (info.offset - info.extra_read - 24) / 3;
-   } else {
-      if (info.bpp < 16)
-         psize = (info.offset - info.extra_read - info.hsz) >> 2;
-   }
-   if (psize == 0) {
-      // accept some number of extra bytes after the header, but if the offset points either to before
-      // the header ends or implies a large amount of extra data, reject the file as malformed
-      int bytes_read_so_far = s->callback_already_read + (int)(s->img_buffer - s->img_buffer_original);
-      int header_limit = 1024; // max we actually read is below 256 bytes currently.
-      int extra_data_limit = 256*4; // what ordinarily goes here is a palette; 256 entries*4 bytes is its max size.
-      if (bytes_read_so_far <= 0 || bytes_read_so_far > header_limit) {
-         return stbi__errpuc("bad header", "Corrupt BMP");
-      }
-      // we established that bytes_read_so_far is positive and sensible.
-      // the first half of this test rejects offsets that are either too small positives, or
-      // negative, and guarantees that info.offset >= bytes_read_so_far > 0. this in turn
-      // ensures the number computed in the second half of the test can't overflow.
-      if (info.offset < bytes_read_so_far || info.offset - bytes_read_so_far > extra_data_limit) {
-         return stbi__errpuc("bad offset", "Corrupt BMP");
-      } else {
-         stbi__skip(s, info.offset - bytes_read_so_far);
-      }
-   }
-
-   if (info.bpp == 24 && ma == 0xff000000)
-      s->img_n = 3;
-   else
-      s->img_n = ma ? 4 : 3;
-   if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
-      target = req_comp;
-   else
-      target = s->img_n; // if they want monochrome, we'll post-convert
-
-   // sanity-check size
-   if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
-      return stbi__errpuc("too large", "Corrupt BMP");
-
-   out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
-   if (!out) return stbi__errpuc("outofmem", "Out of memory");
-   if (info.bpp < 16) {
-      int z=0;
-      if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); }
-      for (i=0; i < psize; ++i) {
-         pal[i][2] = stbi__get8(s);
-         pal[i][1] = stbi__get8(s);
-         pal[i][0] = stbi__get8(s);
-         if (info.hsz != 12) stbi__get8(s);
-         pal[i][3] = 255;
-      }
-      stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
-      if (info.bpp == 1) width = (s->img_x + 7) >> 3;
-      else if (info.bpp == 4) width = (s->img_x + 1) >> 1;
-      else if (info.bpp == 8) width = s->img_x;
-      else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); }
-      pad = (-width)&3;
-      if (info.bpp == 1) {
-         for (j=0; j < (int) s->img_y; ++j) {
-            int bit_offset = 7, v = stbi__get8(s);
-            for (i=0; i < (int) s->img_x; ++i) {
-               int color = (v>>bit_offset)&0x1;
-               out[z++] = pal[color][0];
-               out[z++] = pal[color][1];
-               out[z++] = pal[color][2];
-               if (target == 4) out[z++] = 255;
-               if (i+1 == (int) s->img_x) break;
-               if((--bit_offset) < 0) {
-                  bit_offset = 7;
-                  v = stbi__get8(s);
-               }
-            }
-            stbi__skip(s, pad);
-         }
-      } else {
-         for (j=0; j < (int) s->img_y; ++j) {
-            for (i=0; i < (int) s->img_x; i += 2) {
-               int v=stbi__get8(s),v2=0;
-               if (info.bpp == 4) {
-                  v2 = v & 15;
-                  v >>= 4;
-               }
-               out[z++] = pal[v][0];
-               out[z++] = pal[v][1];
-               out[z++] = pal[v][2];
-               if (target == 4) out[z++] = 255;
-               if (i+1 == (int) s->img_x) break;
-               v = (info.bpp == 8) ? stbi__get8(s) : v2;
-               out[z++] = pal[v][0];
-               out[z++] = pal[v][1];
-               out[z++] = pal[v][2];
-               if (target == 4) out[z++] = 255;
-            }
-            stbi__skip(s, pad);
-         }
-      }
-   } else {
-      int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
-      int z = 0;
-      int easy=0;
-      stbi__skip(s, info.offset - info.extra_read - info.hsz);
-      if (info.bpp == 24) width = 3 * s->img_x;
-      else if (info.bpp == 16) width = 2*s->img_x;
-      else /* bpp = 32 and pad = 0 */ width=0;
-      pad = (-width) & 3;
-      if (info.bpp == 24) {
-         easy = 1;
-      } else if (info.bpp == 32) {
-         if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
-            easy = 2;
-      }
-      if (!easy) {
-         if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
-         // right shift amt to put high bit in position #7
-         rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr);
-         gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg);
-         bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb);
-         ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma);
-         if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
-      }
-      for (j=0; j < (int) s->img_y; ++j) {
-         if (easy) {
-            for (i=0; i < (int) s->img_x; ++i) {
-               unsigned char a;
-               out[z+2] = stbi__get8(s);
-               out[z+1] = stbi__get8(s);
-               out[z+0] = stbi__get8(s);
-               z += 3;
-               a = (easy == 2 ? stbi__get8(s) : 255);
-               all_a |= a;
-               if (target == 4) out[z++] = a;
-            }
-         } else {
-            int bpp = info.bpp;
-            for (i=0; i < (int) s->img_x; ++i) {
-               stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s));
-               unsigned int a;
-               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
-               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
-               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
-               a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
-               all_a |= a;
-               if (target == 4) out[z++] = STBI__BYTECAST(a);
-            }
-         }
-         stbi__skip(s, pad);
-      }
-   }
-
-   // if alpha channel is all 0s, replace with all 255s
-   if (target == 4 && all_a == 0)
-      for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4)
-         out[i] = 255;
-
-   if (flip_vertically) {
-      stbi_uc t;
-      for (j=0; j < (int) s->img_y>>1; ++j) {
-         stbi_uc *p1 = out +      j     *s->img_x*target;
-         stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target;
-         for (i=0; i < (int) s->img_x*target; ++i) {
-            t = p1[i]; p1[i] = p2[i]; p2[i] = t;
-         }
-      }
-   }
-
-   if (req_comp && req_comp != target) {
-      out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
-      if (out == NULL) return out; // stbi__convert_format frees input on failure
-   }
-
-   *x = s->img_x;
-   *y = s->img_y;
-   if (comp) *comp = s->img_n;
-   return out;
-}
-#endif
-
-// Targa Truevision - TGA
-// by Jonathan Dummer
-#ifndef STBI_NO_TGA
-// returns STBI_rgb or whatever, 0 on error
-static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16)
-{
-   // only RGB or RGBA (incl. 16bit) or grey allowed
-   if (is_rgb16) *is_rgb16 = 0;
-   switch(bits_per_pixel) {
-      case 8:  return STBI_grey;
-      case 16: if(is_grey) return STBI_grey_alpha;
-               // fallthrough
-      case 15: if(is_rgb16) *is_rgb16 = 1;
-               return STBI_rgb;
-      case 24: // fallthrough
-      case 32: return bits_per_pixel/8;
-      default: return 0;
-   }
-}
-
-static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp)
-{
-    int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
-    int sz, tga_colormap_type;
-    stbi__get8(s);                   // discard Offset
-    tga_colormap_type = stbi__get8(s); // colormap type
-    if( tga_colormap_type > 1 ) {
-        stbi__rewind(s);
-        return 0;      // only RGB or indexed allowed
-    }
-    tga_image_type = stbi__get8(s); // image type
-    if ( tga_colormap_type == 1 ) { // colormapped (paletted) image
-        if (tga_image_type != 1 && tga_image_type != 9) {
-            stbi__rewind(s);
-            return 0;
-        }
-        stbi__skip(s,4);       // skip index of first colormap entry and number of entries
-        sz = stbi__get8(s);    //   check bits per palette color entry
-        if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) {
-            stbi__rewind(s);
-            return 0;
-        }
-        stbi__skip(s,4);       // skip image x and y origin
-        tga_colormap_bpp = sz;
-    } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
-        if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) {
-            stbi__rewind(s);
-            return 0; // only RGB or grey allowed, +/- RLE
-        }
-        stbi__skip(s,9); // skip colormap specification and image x/y origin
-        tga_colormap_bpp = 0;
-    }
-    tga_w = stbi__get16le(s);
-    if( tga_w < 1 ) {
-        stbi__rewind(s);
-        return 0;   // test width
-    }
-    tga_h = stbi__get16le(s);
-    if( tga_h < 1 ) {
-        stbi__rewind(s);
-        return 0;   // test height
-    }
-    tga_bits_per_pixel = stbi__get8(s); // bits per pixel
-    stbi__get8(s); // ignore alpha bits
-    if (tga_colormap_bpp != 0) {
-        if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
-            // when using a colormap, tga_bits_per_pixel is the size of the indexes
-            // I don't think anything but 8 or 16bit indexes makes sense
-            stbi__rewind(s);
-            return 0;
-        }
-        tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
-    } else {
-        tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL);
-    }
-    if(!tga_comp) {
-      stbi__rewind(s);
-      return 0;
-    }
-    if (x) *x = tga_w;
-    if (y) *y = tga_h;
-    if (comp) *comp = tga_comp;
-    return 1;                   // seems to have passed everything
-}
-
-static int stbi__tga_test(stbi__context *s)
-{
-   int res = 0;
-   int sz, tga_color_type;
-   stbi__get8(s);      //   discard Offset
-   tga_color_type = stbi__get8(s);   //   color type
-   if ( tga_color_type > 1 ) goto errorEnd;   //   only RGB or indexed allowed
-   sz = stbi__get8(s);   //   image type
-   if ( tga_color_type == 1 ) { // colormapped (paletted) image
-      if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9
-      stbi__skip(s,4);       // skip index of first colormap entry and number of entries
-      sz = stbi__get8(s);    //   check bits per palette color entry
-      if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
-      stbi__skip(s,4);       // skip image x and y origin
-   } else { // "normal" image w/o colormap
-      if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE
-      stbi__skip(s,9); // skip colormap specification and image x/y origin
-   }
-   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test width
-   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test height
-   sz = stbi__get8(s);   //   bits per pixel
-   if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index
-   if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
-
-   res = 1; // if we got this far, everything's good and we can return 1 instead of 0
-
-errorEnd:
-   stbi__rewind(s);
-   return res;
-}
-
-// read 16bit value and convert to 24bit RGB
-static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out)
-{
-   stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
-   stbi__uint16 fiveBitMask = 31;
-   // we have 3 channels with 5bits each
-   int r = (px >> 10) & fiveBitMask;
-   int g = (px >> 5) & fiveBitMask;
-   int b = px & fiveBitMask;
-   // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later
-   out[0] = (stbi_uc)((r * 255)/31);
-   out[1] = (stbi_uc)((g * 255)/31);
-   out[2] = (stbi_uc)((b * 255)/31);
-
-   // some people claim that the most significant bit might be used for alpha
-   // (possibly if an alpha-bit is set in the "image descriptor byte")
-   // but that only made 16bit test images completely translucent..
-   // so let's treat all 15 and 16bit TGAs as RGB with no alpha.
-}
-
-static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   //   read in the TGA header stuff
-   int tga_offset = stbi__get8(s);
-   int tga_indexed = stbi__get8(s);
-   int tga_image_type = stbi__get8(s);
-   int tga_is_RLE = 0;
-   int tga_palette_start = stbi__get16le(s);
-   int tga_palette_len = stbi__get16le(s);
-   int tga_palette_bits = stbi__get8(s);
-   int tga_x_origin = stbi__get16le(s);
-   int tga_y_origin = stbi__get16le(s);
-   int tga_width = stbi__get16le(s);
-   int tga_height = stbi__get16le(s);
-   int tga_bits_per_pixel = stbi__get8(s);
-   int tga_comp, tga_rgb16=0;
-   int tga_inverted = stbi__get8(s);
-   // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?)
-   //   image data
-   unsigned char *tga_data;
-   unsigned char *tga_palette = NULL;
-   int i, j;
-   unsigned char raw_data[4] = {0};
-   int RLE_count = 0;
-   int RLE_repeating = 0;
-   int read_next_pixel = 1;
-   STBI_NOTUSED(ri);
-   STBI_NOTUSED(tga_x_origin); // @TODO
-   STBI_NOTUSED(tga_y_origin); // @TODO
-
-   if (tga_height > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (tga_width > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   //   do a tiny bit of precessing
-   if ( tga_image_type >= 8 )
-   {
-      tga_image_type -= 8;
-      tga_is_RLE = 1;
-   }
-   tga_inverted = 1 - ((tga_inverted >> 5) & 1);
-
-   //   If I'm paletted, then I'll use the number of bits from the palette
-   if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
-   else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
-
-   if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency
-      return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
-
-   //   tga info
-   *x = tga_width;
-   *y = tga_height;
-   if (comp) *comp = tga_comp;
-
-   if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
-      return stbi__errpuc("too large", "Corrupt TGA");
-
-   tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
-   if (!tga_data) return stbi__errpuc("outofmem", "Out of memory");
-
-   // skip to the data's starting position (offset usually = 0)
-   stbi__skip(s, tga_offset );
-
-   if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) {
-      for (i=0; i < tga_height; ++i) {
-         int row = tga_inverted ? tga_height -i - 1 : i;
-         stbi_uc *tga_row = tga_data + row*tga_width*tga_comp;
-         stbi__getn(s, tga_row, tga_width * tga_comp);
-      }
-   } else  {
-      //   do I need to load a palette?
-      if ( tga_indexed)
-      {
-         if (tga_palette_len == 0) {  /* you have to have at least one entry! */
-            STBI_FREE(tga_data);
-            return stbi__errpuc("bad palette", "Corrupt TGA");
-         }
-
-         //   any data to skip? (offset usually = 0)
-         stbi__skip(s, tga_palette_start );
-         //   load the palette
-         tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
-         if (!tga_palette) {
-            STBI_FREE(tga_data);
-            return stbi__errpuc("outofmem", "Out of memory");
-         }
-         if (tga_rgb16) {
-            stbi_uc *pal_entry = tga_palette;
-            STBI_ASSERT(tga_comp == STBI_rgb);
-            for (i=0; i < tga_palette_len; ++i) {
-               stbi__tga_read_rgb16(s, pal_entry);
-               pal_entry += tga_comp;
-            }
-         } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
-               STBI_FREE(tga_data);
-               STBI_FREE(tga_palette);
-               return stbi__errpuc("bad palette", "Corrupt TGA");
-         }
-      }
-      //   load the data
-      for (i=0; i < tga_width * tga_height; ++i)
-      {
-         //   if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
-         if ( tga_is_RLE )
-         {
-            if ( RLE_count == 0 )
-            {
-               //   yep, get the next byte as a RLE command
-               int RLE_cmd = stbi__get8(s);
-               RLE_count = 1 + (RLE_cmd & 127);
-               RLE_repeating = RLE_cmd >> 7;
-               read_next_pixel = 1;
-            } else if ( !RLE_repeating )
-            {
-               read_next_pixel = 1;
-            }
-         } else
-         {
-            read_next_pixel = 1;
-         }
-         //   OK, if I need to read a pixel, do it now
-         if ( read_next_pixel )
-         {
-            //   load however much data we did have
-            if ( tga_indexed )
-            {
-               // read in index, then perform the lookup
-               int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
-               if ( pal_idx >= tga_palette_len ) {
-                  // invalid index
-                  pal_idx = 0;
-               }
-               pal_idx *= tga_comp;
-               for (j = 0; j < tga_comp; ++j) {
-                  raw_data[j] = tga_palette[pal_idx+j];
-               }
-            } else if(tga_rgb16) {
-               STBI_ASSERT(tga_comp == STBI_rgb);
-               stbi__tga_read_rgb16(s, raw_data);
-            } else {
-               //   read in the data raw
-               for (j = 0; j < tga_comp; ++j) {
-                  raw_data[j] = stbi__get8(s);
-               }
-            }
-            //   clear the reading flag for the next pixel
-            read_next_pixel = 0;
-         } // end of reading a pixel
-
-         // copy data
-         for (j = 0; j < tga_comp; ++j)
-           tga_data[i*tga_comp+j] = raw_data[j];
-
-         //   in case we're in RLE mode, keep counting down
-         --RLE_count;
-      }
-      //   do I need to invert the image?
-      if ( tga_inverted )
-      {
-         for (j = 0; j*2 < tga_height; ++j)
-         {
-            int index1 = j * tga_width * tga_comp;
-            int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
-            for (i = tga_width * tga_comp; i > 0; --i)
-            {
-               unsigned char temp = tga_data[index1];
-               tga_data[index1] = tga_data[index2];
-               tga_data[index2] = temp;
-               ++index1;
-               ++index2;
-            }
-         }
-      }
-      //   clear my palette, if I had one
-      if ( tga_palette != NULL )
-      {
-         STBI_FREE( tga_palette );
-      }
-   }
-
-   // swap RGB - if the source data was RGB16, it already is in the right order
-   if (tga_comp >= 3 && !tga_rgb16)
-   {
-      unsigned char* tga_pixel = tga_data;
-      for (i=0; i < tga_width * tga_height; ++i)
-      {
-         unsigned char temp = tga_pixel[0];
-         tga_pixel[0] = tga_pixel[2];
-         tga_pixel[2] = temp;
-         tga_pixel += tga_comp;
-      }
-   }
-
-   // convert to target component count
-   if (req_comp && req_comp != tga_comp)
-      tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
-
-   //   the things I do to get rid of an error message, and yet keep
-   //   Microsoft's C compilers happy... [8^(
-   tga_palette_start = tga_palette_len = tga_palette_bits =
-         tga_x_origin = tga_y_origin = 0;
-   STBI_NOTUSED(tga_palette_start);
-   //   OK, done
-   return tga_data;
-}
-#endif
-
-// *************************************************************************************************
-// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB
-
-#ifndef STBI_NO_PSD
-static int stbi__psd_test(stbi__context *s)
-{
-   int r = (stbi__get32be(s) == 0x38425053);
-   stbi__rewind(s);
-   return r;
-}
-
-static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount)
-{
-   int count, nleft, len;
-
-   count = 0;
-   while ((nleft = pixelCount - count) > 0) {
-      len = stbi__get8(s);
-      if (len == 128) {
-         // No-op.
-      } else if (len < 128) {
-         // Copy next len+1 bytes literally.
-         len++;
-         if (len > nleft) return 0; // corrupt data
-         count += len;
-         while (len) {
-            *p = stbi__get8(s);
-            p += 4;
-            len--;
-         }
-      } else if (len > 128) {
-         stbi_uc   val;
-         // Next -len+1 bytes in the dest are replicated from next source byte.
-         // (Interpret len as a negative 8-bit int.)
-         len = 257 - len;
-         if (len > nleft) return 0; // corrupt data
-         val = stbi__get8(s);
-         count += len;
-         while (len) {
-            *p = val;
-            p += 4;
-            len--;
-         }
-      }
-   }
-
-   return 1;
-}
-
-static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
-{
-   int pixelCount;
-   int channelCount, compression;
-   int channel, i;
-   int bitdepth;
-   int w,h;
-   stbi_uc *out;
-   STBI_NOTUSED(ri);
-
-   // Check identifier
-   if (stbi__get32be(s) != 0x38425053)   // "8BPS"
-      return stbi__errpuc("not PSD", "Corrupt PSD image");
-
-   // Check file type version.
-   if (stbi__get16be(s) != 1)
-      return stbi__errpuc("wrong version", "Unsupported version of PSD image");
-
-   // Skip 6 reserved bytes.
-   stbi__skip(s, 6 );
-
-   // Read the number of channels (R, G, B, A, etc).
-   channelCount = stbi__get16be(s);
-   if (channelCount < 0 || channelCount > 16)
-      return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
-
-   // Read the rows and columns of the image.
-   h = stbi__get32be(s);
-   w = stbi__get32be(s);
-
-   if (h > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (w > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   // Make sure the depth is 8 bits.
-   bitdepth = stbi__get16be(s);
-   if (bitdepth != 8 && bitdepth != 16)
-      return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
-
-   // Make sure the color mode is RGB.
-   // Valid options are:
-   //   0: Bitmap
-   //   1: Grayscale
-   //   2: Indexed color
-   //   3: RGB color
-   //   4: CMYK color
-   //   7: Multichannel
-   //   8: Duotone
-   //   9: Lab color
-   if (stbi__get16be(s) != 3)
-      return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
-
-   // Skip the Mode Data.  (It's the palette for indexed color; other info for other modes.)
-   stbi__skip(s,stbi__get32be(s) );
-
-   // Skip the image resources.  (resolution, pen tool paths, etc)
-   stbi__skip(s, stbi__get32be(s) );
-
-   // Skip the reserved data.
-   stbi__skip(s, stbi__get32be(s) );
-
-   // Find out if the data is compressed.
-   // Known values:
-   //   0: no compression
-   //   1: RLE compressed
-   compression = stbi__get16be(s);
-   if (compression > 1)
-      return stbi__errpuc("bad compression", "PSD has an unknown compression format");
-
-   // Check size
-   if (!stbi__mad3sizes_valid(4, w, h, 0))
-      return stbi__errpuc("too large", "Corrupt PSD");
-
-   // Create the destination image.
-
-   if (!compression && bitdepth == 16 && bpc == 16) {
-      out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0);
-      ri->bits_per_channel = 16;
-   } else
-      out = (stbi_uc *) stbi__malloc(4 * w*h);
-
-   if (!out) return stbi__errpuc("outofmem", "Out of memory");
-   pixelCount = w*h;
-
-   // Initialize the data to zero.
-   //memset( out, 0, pixelCount * 4 );
-
-   // Finally, the image data.
-   if (compression) {
-      // RLE as used by .PSD and .TIFF
-      // Loop until you get the number of unpacked bytes you are expecting:
-      //     Read the next source byte into n.
-      //     If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
-      //     Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
-      //     Else if n is 128, noop.
-      // Endloop
-
-      // The RLE-compressed data is preceded by a 2-byte data count for each row in the data,
-      // which we're going to just skip.
-      stbi__skip(s, h * channelCount * 2 );
-
-      // Read the RLE data by channel.
-      for (channel = 0; channel < 4; channel++) {
-         stbi_uc *p;
-
-         p = out+channel;
-         if (channel >= channelCount) {
-            // Fill this channel with default data.
-            for (i = 0; i < pixelCount; i++, p += 4)
-               *p = (channel == 3 ? 255 : 0);
-         } else {
-            // Read the RLE data.
-            if (!stbi__psd_decode_rle(s, p, pixelCount)) {
-               STBI_FREE(out);
-               return stbi__errpuc("corrupt", "bad RLE data");
-            }
-         }
-      }
-
-   } else {
-      // We're at the raw image data.  It's each channel in order (Red, Green, Blue, Alpha, ...)
-      // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image.
-
-      // Read the data by channel.
-      for (channel = 0; channel < 4; channel++) {
-         if (channel >= channelCount) {
-            // Fill this channel with default data.
-            if (bitdepth == 16 && bpc == 16) {
-               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
-               stbi__uint16 val = channel == 3 ? 65535 : 0;
-               for (i = 0; i < pixelCount; i++, q += 4)
-                  *q = val;
-            } else {
-               stbi_uc *p = out+channel;
-               stbi_uc val = channel == 3 ? 255 : 0;
-               for (i = 0; i < pixelCount; i++, p += 4)
-                  *p = val;
-            }
-         } else {
-            if (ri->bits_per_channel == 16) {    // output bpc
-               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
-               for (i = 0; i < pixelCount; i++, q += 4)
-                  *q = (stbi__uint16) stbi__get16be(s);
-            } else {
-               stbi_uc *p = out+channel;
-               if (bitdepth == 16) {  // input bpc
-                  for (i = 0; i < pixelCount; i++, p += 4)
-                     *p = (stbi_uc) (stbi__get16be(s) >> 8);
-               } else {
-                  for (i = 0; i < pixelCount; i++, p += 4)
-                     *p = stbi__get8(s);
-               }
-            }
-         }
-      }
-   }
-
-   // remove weird white matte from PSD
-   if (channelCount >= 4) {
-      if (ri->bits_per_channel == 16) {
-         for (i=0; i < w*h; ++i) {
-            stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i;
-            if (pixel[3] != 0 && pixel[3] != 65535) {
-               float a = pixel[3] / 65535.0f;
-               float ra = 1.0f / a;
-               float inv_a = 65535.0f * (1 - ra);
-               pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a);
-               pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a);
-               pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a);
-            }
-         }
-      } else {
-         for (i=0; i < w*h; ++i) {
-            unsigned char *pixel = out + 4*i;
-            if (pixel[3] != 0 && pixel[3] != 255) {
-               float a = pixel[3] / 255.0f;
-               float ra = 1.0f / a;
-               float inv_a = 255.0f * (1 - ra);
-               pixel[0] = (unsigned char) (pixel[0]*ra + inv_a);
-               pixel[1] = (unsigned char) (pixel[1]*ra + inv_a);
-               pixel[2] = (unsigned char) (pixel[2]*ra + inv_a);
-            }
-         }
-      }
-   }
-
-   // convert to desired output format
-   if (req_comp && req_comp != 4) {
-      if (ri->bits_per_channel == 16)
-         out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h);
-      else
-         out = stbi__convert_format(out, 4, req_comp, w, h);
-      if (out == NULL) return out; // stbi__convert_format frees input on failure
-   }
-
-   if (comp) *comp = 4;
-   *y = h;
-   *x = w;
-
-   return out;
-}
-#endif
-
-// *************************************************************************************************
-// Softimage PIC loader
-// by Tom Seddon
-//
-// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
-// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
-
-#ifndef STBI_NO_PIC
-static int stbi__pic_is4(stbi__context *s,const char *str)
-{
-   int i;
-   for (i=0; i<4; ++i)
-      if (stbi__get8(s) != (stbi_uc)str[i])
-         return 0;
-
-   return 1;
-}
-
-static int stbi__pic_test_core(stbi__context *s)
-{
-   int i;
-
-   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34"))
-      return 0;
-
-   for(i=0;i<84;++i)
-      stbi__get8(s);
-
-   if (!stbi__pic_is4(s,"PICT"))
-      return 0;
-
-   return 1;
-}
-
-typedef struct
-{
-   stbi_uc size,type,channel;
-} stbi__pic_packet;
-
-static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest)
-{
-   int mask=0x80, i;
-
-   for (i=0; i<4; ++i, mask>>=1) {
-      if (channel & mask) {
-         if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short");
-         dest[i]=stbi__get8(s);
-      }
-   }
-
-   return dest;
-}
-
-static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src)
-{
-   int mask=0x80,i;
-
-   for (i=0;i<4; ++i, mask>>=1)
-      if (channel&mask)
-         dest[i]=src[i];
-}
-
-static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result)
-{
-   int act_comp=0,num_packets=0,y,chained;
-   stbi__pic_packet packets[10];
-
-   // this will (should...) cater for even some bizarre stuff like having data
-    // for the same channel in multiple packets.
-   do {
-      stbi__pic_packet *packet;
-
-      if (num_packets==sizeof(packets)/sizeof(packets[0]))
-         return stbi__errpuc("bad format","too many packets");
-
-      packet = &packets[num_packets++];
-
-      chained = stbi__get8(s);
-      packet->size    = stbi__get8(s);
-      packet->type    = stbi__get8(s);
-      packet->channel = stbi__get8(s);
-
-      act_comp |= packet->channel;
-
-      if (stbi__at_eof(s))          return stbi__errpuc("bad file","file too short (reading packets)");
-      if (packet->size != 8)  return stbi__errpuc("bad format","packet isn't 8bpp");
-   } while (chained);
-
-   *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
-
-   for(y=0; y<height; ++y) {
-      int packet_idx;
-
-      for(packet_idx=0; packet_idx < num_packets; ++packet_idx) {
-         stbi__pic_packet *packet = &packets[packet_idx];
-         stbi_uc *dest = result+y*width*4;
-
-         switch (packet->type) {
-            default:
-               return stbi__errpuc("bad format","packet has bad compression type");
-
-            case 0: {//uncompressed
-               int x;
-
-               for(x=0;x<width;++x, dest+=4)
-                  if (!stbi__readval(s,packet->channel,dest))
-                     return 0;
-               break;
-            }
-
-            case 1://Pure RLE
-               {
-                  int left=width, i;
-
-                  while (left>0) {
-                     stbi_uc count,value[4];
-
-                     count=stbi__get8(s);
-                     if (stbi__at_eof(s))   return stbi__errpuc("bad file","file too short (pure read count)");
-
-                     if (count > left)
-                        count = (stbi_uc) left;
-
-                     if (!stbi__readval(s,packet->channel,value))  return 0;
-
-                     for(i=0; i<count; ++i,dest+=4)
-                        stbi__copyval(packet->channel,dest,value);
-                     left -= count;
-                  }
-               }
-               break;
-
-            case 2: {//Mixed RLE
-               int left=width;
-               while (left>0) {
-                  int count = stbi__get8(s), i;
-                  if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (mixed read count)");
-
-                  if (count >= 128) { // Repeated
-                     stbi_uc value[4];
-
-                     if (count==128)
-                        count = stbi__get16be(s);
-                     else
-                        count -= 127;
-                     if (count > left)
-                        return stbi__errpuc("bad file","scanline overrun");
-
-                     if (!stbi__readval(s,packet->channel,value))
-                        return 0;
-
-                     for(i=0;i<count;++i, dest += 4)
-                        stbi__copyval(packet->channel,dest,value);
-                  } else { // Raw
-                     ++count;
-                     if (count>left) return stbi__errpuc("bad file","scanline overrun");
-
-                     for(i=0;i<count;++i, dest+=4)
-                        if (!stbi__readval(s,packet->channel,dest))
-                           return 0;
-                  }
-                  left-=count;
-               }
-               break;
-            }
-         }
-      }
-   }
-
-   return result;
-}
-
-static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *result;
-   int i, x,y, internal_comp;
-   STBI_NOTUSED(ri);
-
-   if (!comp) comp = &internal_comp;
-
-   for (i=0; i<92; ++i)
-      stbi__get8(s);
-
-   x = stbi__get16be(s);
-   y = stbi__get16be(s);
-
-   if (y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (pic header)");
-   if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode");
-
-   stbi__get32be(s); //skip `ratio'
-   stbi__get16be(s); //skip `fields'
-   stbi__get16be(s); //skip `pad'
-
-   // intermediate buffer is RGBA
-   result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0);
-   if (!result) return stbi__errpuc("outofmem", "Out of memory");
-   memset(result, 0xff, x*y*4);
-
-   if (!stbi__pic_load_core(s,x,y,comp, result)) {
-      STBI_FREE(result);
-      result=0;
-   }
-   *px = x;
-   *py = y;
-   if (req_comp == 0) req_comp = *comp;
-   result=stbi__convert_format(result,4,req_comp,x,y);
-
-   return result;
-}
-
-static int stbi__pic_test(stbi__context *s)
-{
-   int r = stbi__pic_test_core(s);
-   stbi__rewind(s);
-   return r;
-}
-#endif
-
-// *************************************************************************************************
-// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
-
-#ifndef STBI_NO_GIF
-typedef struct
-{
-   stbi__int16 prefix;
-   stbi_uc first;
-   stbi_uc suffix;
-} stbi__gif_lzw;
-
-typedef struct
-{
-   int w,h;
-   stbi_uc *out;                 // output buffer (always 4 components)
-   stbi_uc *background;          // The current "background" as far as a gif is concerned
-   stbi_uc *history;
-   int flags, bgindex, ratio, transparent, eflags;
-   stbi_uc  pal[256][4];
-   stbi_uc lpal[256][4];
-   stbi__gif_lzw codes[8192];
-   stbi_uc *color_table;
-   int parse, step;
-   int lflags;
-   int start_x, start_y;
-   int max_x, max_y;
-   int cur_x, cur_y;
-   int line_size;
-   int delay;
-} stbi__gif;
-
-static int stbi__gif_test_raw(stbi__context *s)
-{
-   int sz;
-   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0;
-   sz = stbi__get8(s);
-   if (sz != '9' && sz != '7') return 0;
-   if (stbi__get8(s) != 'a') return 0;
-   return 1;
-}
-
-static int stbi__gif_test(stbi__context *s)
-{
-   int r = stbi__gif_test_raw(s);
-   stbi__rewind(s);
-   return r;
-}
-
-static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp)
-{
-   int i;
-   for (i=0; i < num_entries; ++i) {
-      pal[i][2] = stbi__get8(s);
-      pal[i][1] = stbi__get8(s);
-      pal[i][0] = stbi__get8(s);
-      pal[i][3] = transp == i ? 0 : 255;
-   }
-}
-
-static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info)
-{
-   stbi_uc version;
-   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
-      return stbi__err("not GIF", "Corrupt GIF");
-
-   version = stbi__get8(s);
-   if (version != '7' && version != '9')    return stbi__err("not GIF", "Corrupt GIF");
-   if (stbi__get8(s) != 'a')                return stbi__err("not GIF", "Corrupt GIF");
-
-   stbi__g_failure_reason = "";
-   g->w = stbi__get16le(s);
-   g->h = stbi__get16le(s);
-   g->flags = stbi__get8(s);
-   g->bgindex = stbi__get8(s);
-   g->ratio = stbi__get8(s);
-   g->transparent = -1;
-
-   if (g->w > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-   if (g->h > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-
-   if (comp != 0) *comp = 4;  // can't actually tell whether it's 3 or 4 until we parse the comments
-
-   if (is_info) return 1;
-
-   if (g->flags & 0x80)
-      stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1);
-
-   return 1;
-}
-
-static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp)
-{
-   stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif));
-   if (!g) return stbi__err("outofmem", "Out of memory");
-   if (!stbi__gif_header(s, g, comp, 1)) {
-      STBI_FREE(g);
-      stbi__rewind( s );
-      return 0;
-   }
-   if (x) *x = g->w;
-   if (y) *y = g->h;
-   STBI_FREE(g);
-   return 1;
-}
-
-static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code)
-{
-   stbi_uc *p, *c;
-   int idx;
-
-   // recurse to decode the prefixes, since the linked-list is backwards,
-   // and working backwards through an interleaved image would be nasty
-   if (g->codes[code].prefix >= 0)
-      stbi__out_gif_code(g, g->codes[code].prefix);
-
-   if (g->cur_y >= g->max_y) return;
-
-   idx = g->cur_x + g->cur_y;
-   p = &g->out[idx];
-   g->history[idx / 4] = 1;
-
-   c = &g->color_table[g->codes[code].suffix * 4];
-   if (c[3] > 128) { // don't render transparent pixels;
-      p[0] = c[2];
-      p[1] = c[1];
-      p[2] = c[0];
-      p[3] = c[3];
-   }
-   g->cur_x += 4;
-
-   if (g->cur_x >= g->max_x) {
-      g->cur_x = g->start_x;
-      g->cur_y += g->step;
-
-      while (g->cur_y >= g->max_y && g->parse > 0) {
-         g->step = (1 << g->parse) * g->line_size;
-         g->cur_y = g->start_y + (g->step >> 1);
-         --g->parse;
-      }
-   }
-}
-
-static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g)
-{
-   stbi_uc lzw_cs;
-   stbi__int32 len, init_code;
-   stbi__uint32 first;
-   stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
-   stbi__gif_lzw *p;
-
-   lzw_cs = stbi__get8(s);
-   if (lzw_cs > 12) return NULL;
-   clear = 1 << lzw_cs;
-   first = 1;
-   codesize = lzw_cs + 1;
-   codemask = (1 << codesize) - 1;
-   bits = 0;
-   valid_bits = 0;
-   for (init_code = 0; init_code < clear; init_code++) {
-      g->codes[init_code].prefix = -1;
-      g->codes[init_code].first = (stbi_uc) init_code;
-      g->codes[init_code].suffix = (stbi_uc) init_code;
-   }
-
-   // support no starting clear code
-   avail = clear+2;
-   oldcode = -1;
-
-   len = 0;
-   for(;;) {
-      if (valid_bits < codesize) {
-         if (len == 0) {
-            len = stbi__get8(s); // start new block
-            if (len == 0)
-               return g->out;
-         }
-         --len;
-         bits |= (stbi__int32) stbi__get8(s) << valid_bits;
-         valid_bits += 8;
-      } else {
-         stbi__int32 code = bits & codemask;
-         bits >>= codesize;
-         valid_bits -= codesize;
-         // @OPTIMIZE: is there some way we can accelerate the non-clear path?
-         if (code == clear) {  // clear code
-            codesize = lzw_cs + 1;
-            codemask = (1 << codesize) - 1;
-            avail = clear + 2;
-            oldcode = -1;
-            first = 0;
-         } else if (code == clear + 1) { // end of stream code
-            stbi__skip(s, len);
-            while ((len = stbi__get8(s)) > 0)
-               stbi__skip(s,len);
-            return g->out;
-         } else if (code <= avail) {
-            if (first) {
-               return stbi__errpuc("no clear code", "Corrupt GIF");
-            }
-
-            if (oldcode >= 0) {
-               p = &g->codes[avail++];
-               if (avail > 8192) {
-                  return stbi__errpuc("too many codes", "Corrupt GIF");
-               }
-
-               p->prefix = (stbi__int16) oldcode;
-               p->first = g->codes[oldcode].first;
-               p->suffix = (code == avail) ? p->first : g->codes[code].first;
-            } else if (code == avail)
-               return stbi__errpuc("illegal code in raster", "Corrupt GIF");
-
-            stbi__out_gif_code(g, (stbi__uint16) code);
-
-            if ((avail & codemask) == 0 && avail <= 0x0FFF) {
-               codesize++;
-               codemask = (1 << codesize) - 1;
-            }
-
-            oldcode = code;
-         } else {
-            return stbi__errpuc("illegal code in raster", "Corrupt GIF");
-         }
-      }
-   }
-}
-
-// this function is designed to support animated gifs, although stb_image doesn't support it
-// two back is the image from two frames ago, used for a very specific disposal format
-static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back)
-{
-   int dispose;
-   int first_frame;
-   int pi;
-   int pcount;
-   STBI_NOTUSED(req_comp);
-
-   // on first frame, any non-written pixels get the background colour (non-transparent)
-   first_frame = 0;
-   if (g->out == 0) {
-      if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header
-      if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
-         return stbi__errpuc("too large", "GIF image is too large");
-      pcount = g->w * g->h;
-      g->out = (stbi_uc *) stbi__malloc(4 * pcount);
-      g->background = (stbi_uc *) stbi__malloc(4 * pcount);
-      g->history = (stbi_uc *) stbi__malloc(pcount);
-      if (!g->out || !g->background || !g->history)
-         return stbi__errpuc("outofmem", "Out of memory");
-
-      // image is treated as "transparent" at the start - ie, nothing overwrites the current background;
-      // background colour is only used for pixels that are not rendered first frame, after that "background"
-      // color refers to the color that was there the previous frame.
-      memset(g->out, 0x00, 4 * pcount);
-      memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent)
-      memset(g->history, 0x00, pcount);        // pixels that were affected previous frame
-      first_frame = 1;
-   } else {
-      // second frame - how do we dispose of the previous one?
-      dispose = (g->eflags & 0x1C) >> 2;
-      pcount = g->w * g->h;
-
-      if ((dispose == 3) && (two_back == 0)) {
-         dispose = 2; // if I don't have an image to revert back to, default to the old background
-      }
-
-      if (dispose == 3) { // use previous graphic
-         for (pi = 0; pi < pcount; ++pi) {
-            if (g->history[pi]) {
-               memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 );
-            }
-         }
-      } else if (dispose == 2) {
-         // restore what was changed last frame to background before that frame;
-         for (pi = 0; pi < pcount; ++pi) {
-            if (g->history[pi]) {
-               memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 );
-            }
-         }
-      } else {
-         // This is a non-disposal case eithe way, so just
-         // leave the pixels as is, and they will become the new background
-         // 1: do not dispose
-         // 0:  not specified.
-      }
-
-      // background is what out is after the undoing of the previou frame;
-      memcpy( g->background, g->out, 4 * g->w * g->h );
-   }
-
-   // clear my history;
-   memset( g->history, 0x00, g->w * g->h );        // pixels that were affected previous frame
-
-   for (;;) {
-      int tag = stbi__get8(s);
-      switch (tag) {
-         case 0x2C: /* Image Descriptor */
-         {
-            stbi__int32 x, y, w, h;
-            stbi_uc *o;
-
-            x = stbi__get16le(s);
-            y = stbi__get16le(s);
-            w = stbi__get16le(s);
-            h = stbi__get16le(s);
-            if (((x + w) > (g->w)) || ((y + h) > (g->h)))
-               return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
-
-            g->line_size = g->w * 4;
-            g->start_x = x * 4;
-            g->start_y = y * g->line_size;
-            g->max_x   = g->start_x + w * 4;
-            g->max_y   = g->start_y + h * g->line_size;
-            g->cur_x   = g->start_x;
-            g->cur_y   = g->start_y;
-
-            // if the width of the specified rectangle is 0, that means
-            // we may not see *any* pixels or the image is malformed;
-            // to make sure this is caught, move the current y down to
-            // max_y (which is what out_gif_code checks).
-            if (w == 0)
-               g->cur_y = g->max_y;
-
-            g->lflags = stbi__get8(s);
-
-            if (g->lflags & 0x40) {
-               g->step = 8 * g->line_size; // first interlaced spacing
-               g->parse = 3;
-            } else {
-               g->step = g->line_size;
-               g->parse = 0;
-            }
-
-            if (g->lflags & 0x80) {
-               stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
-               g->color_table = (stbi_uc *) g->lpal;
-            } else if (g->flags & 0x80) {
-               g->color_table = (stbi_uc *) g->pal;
-            } else
-               return stbi__errpuc("missing color table", "Corrupt GIF");
-
-            o = stbi__process_gif_raster(s, g);
-            if (!o) return NULL;
-
-            // if this was the first frame,
-            pcount = g->w * g->h;
-            if (first_frame && (g->bgindex > 0)) {
-               // if first frame, any pixel not drawn to gets the background color
-               for (pi = 0; pi < pcount; ++pi) {
-                  if (g->history[pi] == 0) {
-                     g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be;
-                     memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 );
-                  }
-               }
-            }
-
-            return o;
-         }
-
-         case 0x21: // Comment Extension.
-         {
-            int len;
-            int ext = stbi__get8(s);
-            if (ext == 0xF9) { // Graphic Control Extension.
-               len = stbi__get8(s);
-               if (len == 4) {
-                  g->eflags = stbi__get8(s);
-                  g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths.
-
-                  // unset old transparent
-                  if (g->transparent >= 0) {
-                     g->pal[g->transparent][3] = 255;
-                  }
-                  if (g->eflags & 0x01) {
-                     g->transparent = stbi__get8(s);
-                     if (g->transparent >= 0) {
-                        g->pal[g->transparent][3] = 0;
-                     }
-                  } else {
-                     // don't need transparent
-                     stbi__skip(s, 1);
-                     g->transparent = -1;
-                  }
-               } else {
-                  stbi__skip(s, len);
-                  break;
-               }
-            }
-            while ((len = stbi__get8(s)) != 0) {
-               stbi__skip(s, len);
-            }
-            break;
-         }
-
-         case 0x3B: // gif stream termination code
-            return (stbi_uc *) s; // using '1' causes warning on some compilers
-
-         default:
-            return stbi__errpuc("unknown code", "Corrupt GIF");
-      }
-   }
-}
-
-static void *stbi__load_gif_main_outofmem(stbi__gif *g, stbi_uc *out, int **delays)
-{
-   STBI_FREE(g->out);
-   STBI_FREE(g->history);
-   STBI_FREE(g->background);
-
-   if (out) STBI_FREE(out);
-   if (delays && *delays) STBI_FREE(*delays);
-   return stbi__errpuc("outofmem", "Out of memory");
-}
-
-static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
-{
-   if (stbi__gif_test(s)) {
-      int layers = 0;
-      stbi_uc *u = 0;
-      stbi_uc *out = 0;
-      stbi_uc *two_back = 0;
-      stbi__gif g;
-      int stride;
-      int out_size = 0;
-      int delays_size = 0;
-
-      STBI_NOTUSED(out_size);
-      STBI_NOTUSED(delays_size);
-
-      memset(&g, 0, sizeof(g));
-      if (delays) {
-         *delays = 0;
-      }
-
-      do {
-         u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
-         if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
-
-         if (u) {
-            *x = g.w;
-            *y = g.h;
-            ++layers;
-            stride = g.w * g.h * 4;
-
-            if (out) {
-               void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride );
-               if (!tmp)
-                  return stbi__load_gif_main_outofmem(&g, out, delays);
-               else {
-                   out = (stbi_uc*) tmp;
-                   out_size = layers * stride;
-               }
-
-               if (delays) {
-                  int *new_delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers );
-                  if (!new_delays)
-                     return stbi__load_gif_main_outofmem(&g, out, delays);
-                  *delays = new_delays;
-                  delays_size = layers * sizeof(int);
-               }
-            } else {
-               out = (stbi_uc*)stbi__malloc( layers * stride );
-               if (!out)
-                  return stbi__load_gif_main_outofmem(&g, out, delays);
-               out_size = layers * stride;
-               if (delays) {
-                  *delays = (int*) stbi__malloc( layers * sizeof(int) );
-                  if (!*delays)
-                     return stbi__load_gif_main_outofmem(&g, out, delays);
-                  delays_size = layers * sizeof(int);
-               }
-            }
-            memcpy( out + ((layers - 1) * stride), u, stride );
-            if (layers >= 2) {
-               two_back = out - 2 * stride;
-            }
-
-            if (delays) {
-               (*delays)[layers - 1U] = g.delay;
-            }
-         }
-      } while (u != 0);
-
-      // free temp buffer;
-      STBI_FREE(g.out);
-      STBI_FREE(g.history);
-      STBI_FREE(g.background);
-
-      // do the final conversion after loading everything;
-      if (req_comp && req_comp != 4)
-         out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
-
-      *z = layers;
-      return out;
-   } else {
-      return stbi__errpuc("not GIF", "Image was not as a gif type.");
-   }
-}
-
-static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *u = 0;
-   stbi__gif g;
-   memset(&g, 0, sizeof(g));
-   STBI_NOTUSED(ri);
-
-   u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
-   if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
-   if (u) {
-      *x = g.w;
-      *y = g.h;
-
-      // moved conversion to after successful load so that the same
-      // can be done for multiple frames.
-      if (req_comp && req_comp != 4)
-         u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
-   } else if (g.out) {
-      // if there was an error and we allocated an image buffer, free it!
-      STBI_FREE(g.out);
-   }
-
-   // free buffers needed for multiple frame loading;
-   STBI_FREE(g.history);
-   STBI_FREE(g.background);
-
-   return u;
-}
-
-static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   return stbi__gif_info_raw(s,x,y,comp);
-}
-#endif
-
-// *************************************************************************************************
-// Radiance RGBE HDR loader
-// originally by Nicolas Schulz
-#ifndef STBI_NO_HDR
-static int stbi__hdr_test_core(stbi__context *s, const char *signature)
-{
-   int i;
-   for (i=0; signature[i]; ++i)
-      if (stbi__get8(s) != signature[i])
-          return 0;
-   stbi__rewind(s);
-   return 1;
-}
-
-static int stbi__hdr_test(stbi__context* s)
-{
-   int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
-   stbi__rewind(s);
-   if(!r) {
-       r = stbi__hdr_test_core(s, "#?RGBE\n");
-       stbi__rewind(s);
-   }
-   return r;
-}
-
-#define STBI__HDR_BUFLEN  1024
-static char *stbi__hdr_gettoken(stbi__context *z, char *buffer)
-{
-   int len=0;
-   char c = '\0';
-
-   c = (char) stbi__get8(z);
-
-   while (!stbi__at_eof(z) && c != '\n') {
-      buffer[len++] = c;
-      if (len == STBI__HDR_BUFLEN-1) {
-         // flush to end of line
-         while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
-            ;
-         break;
-      }
-      c = (char) stbi__get8(z);
-   }
-
-   buffer[len] = 0;
-   return buffer;
-}
-
-static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp)
-{
-   if ( input[3] != 0 ) {
-      float f1;
-      // Exponent
-      f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
-      if (req_comp <= 2)
-         output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
-      else {
-         output[0] = input[0] * f1;
-         output[1] = input[1] * f1;
-         output[2] = input[2] * f1;
-      }
-      if (req_comp == 2) output[1] = 1;
-      if (req_comp == 4) output[3] = 1;
-   } else {
-      switch (req_comp) {
-         case 4: output[3] = 1; /* fallthrough */
-         case 3: output[0] = output[1] = output[2] = 0;
-                 break;
-         case 2: output[1] = 1; /* fallthrough */
-         case 1: output[0] = 0;
-                 break;
-      }
-   }
-}
-
-static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   char buffer[STBI__HDR_BUFLEN];
-   char *token;
-   int valid = 0;
-   int width, height;
-   stbi_uc *scanline;
-   float *hdr_data;
-   int len;
-   unsigned char count, value;
-   int i, j, k, c1,c2, z;
-   const char *headerToken;
-   STBI_NOTUSED(ri);
-
-   // Check identifier
-   headerToken = stbi__hdr_gettoken(s,buffer);
-   if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
-      return stbi__errpf("not HDR", "Corrupt HDR image");
-
-   // Parse header
-   for(;;) {
-      token = stbi__hdr_gettoken(s,buffer);
-      if (token[0] == 0) break;
-      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
-   }
-
-   if (!valid)    return stbi__errpf("unsupported format", "Unsupported HDR format");
-
-   // Parse width and height
-   // can't use sscanf() if we're not using stdio!
-   token = stbi__hdr_gettoken(s,buffer);
-   if (strncmp(token, "-Y ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
-   token += 3;
-   height = (int) strtol(token, &token, 10);
-   while (*token == ' ') ++token;
-   if (strncmp(token, "+X ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
-   token += 3;
-   width = (int) strtol(token, NULL, 10);
-
-   if (height > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
-   if (width > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
-
-   *x = width;
-   *y = height;
-
-   if (comp) *comp = 3;
-   if (req_comp == 0) req_comp = 3;
-
-   if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
-      return stbi__errpf("too large", "HDR image is too large");
-
-   // Read data
-   hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
-   if (!hdr_data)
-      return stbi__errpf("outofmem", "Out of memory");
-
-   // Load image data
-   // image data is stored as some number of sca
-   if ( width < 8 || width >= 32768) {
-      // Read flat data
-      for (j=0; j < height; ++j) {
-         for (i=0; i < width; ++i) {
-            stbi_uc rgbe[4];
-           main_decode_loop:
-            stbi__getn(s, rgbe, 4);
-            stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
-         }
-      }
-   } else {
-      // Read RLE-encoded data
-      scanline = NULL;
-
-      for (j = 0; j < height; ++j) {
-         c1 = stbi__get8(s);
-         c2 = stbi__get8(s);
-         len = stbi__get8(s);
-         if (c1 != 2 || c2 != 2 || (len & 0x80)) {
-            // not run-length encoded, so we have to actually use THIS data as a decoded
-            // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
-            stbi_uc rgbe[4];
-            rgbe[0] = (stbi_uc) c1;
-            rgbe[1] = (stbi_uc) c2;
-            rgbe[2] = (stbi_uc) len;
-            rgbe[3] = (stbi_uc) stbi__get8(s);
-            stbi__hdr_convert(hdr_data, rgbe, req_comp);
-            i = 1;
-            j = 0;
-            STBI_FREE(scanline);
-            goto main_decode_loop; // yes, this makes no sense
-         }
-         len <<= 8;
-         len |= stbi__get8(s);
-         if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); }
-         if (scanline == NULL) {
-            scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0);
-            if (!scanline) {
-               STBI_FREE(hdr_data);
-               return stbi__errpf("outofmem", "Out of memory");
-            }
-         }
-
-         for (k = 0; k < 4; ++k) {
-            int nleft;
-            i = 0;
-            while ((nleft = width - i) > 0) {
-               count = stbi__get8(s);
-               if (count > 128) {
-                  // Run
-                  value = stbi__get8(s);
-                  count -= 128;
-                  if ((count == 0) || (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
-                  for (z = 0; z < count; ++z)
-                     scanline[i++ * 4 + k] = value;
-               } else {
-                  // Dump
-                  if ((count == 0) || (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
-                  for (z = 0; z < count; ++z)
-                     scanline[i++ * 4 + k] = stbi__get8(s);
-               }
-            }
-         }
-         for (i=0; i < width; ++i)
-            stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp);
-      }
-      if (scanline)
-         STBI_FREE(scanline);
-   }
-
-   return hdr_data;
-}
-
-static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   char buffer[STBI__HDR_BUFLEN];
-   char *token;
-   int valid = 0;
-   int dummy;
-
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-
-   if (stbi__hdr_test(s) == 0) {
-       stbi__rewind( s );
-       return 0;
-   }
-
-   for(;;) {
-      token = stbi__hdr_gettoken(s,buffer);
-      if (token[0] == 0) break;
-      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
-   }
-
-   if (!valid) {
-       stbi__rewind( s );
-       return 0;
-   }
-   token = stbi__hdr_gettoken(s,buffer);
-   if (strncmp(token, "-Y ", 3)) {
-       stbi__rewind( s );
-       return 0;
-   }
-   token += 3;
-   *y = (int) strtol(token, &token, 10);
-   while (*token == ' ') ++token;
-   if (strncmp(token, "+X ", 3)) {
-       stbi__rewind( s );
-       return 0;
-   }
-   token += 3;
-   *x = (int) strtol(token, NULL, 10);
-   *comp = 3;
-   return 1;
-}
-#endif // STBI_NO_HDR
-
-#ifndef STBI_NO_BMP
-static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   void *p;
-   stbi__bmp_data info;
-
-   info.all_a = 255;
-   p = stbi__bmp_parse_header(s, &info);
-   if (p == NULL) {
-      stbi__rewind( s );
-      return 0;
-   }
-   if (x) *x = s->img_x;
-   if (y) *y = s->img_y;
-   if (comp) {
-      if (info.bpp == 24 && info.ma == 0xff000000)
-         *comp = 3;
-      else
-         *comp = info.ma ? 4 : 3;
-   }
-   return 1;
-}
-#endif
-
-#ifndef STBI_NO_PSD
-static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int channelCount, dummy, depth;
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-   if (stbi__get32be(s) != 0x38425053) {
-       stbi__rewind( s );
-       return 0;
-   }
-   if (stbi__get16be(s) != 1) {
-       stbi__rewind( s );
-       return 0;
-   }
-   stbi__skip(s, 6);
-   channelCount = stbi__get16be(s);
-   if (channelCount < 0 || channelCount > 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   *y = stbi__get32be(s);
-   *x = stbi__get32be(s);
-   depth = stbi__get16be(s);
-   if (depth != 8 && depth != 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   if (stbi__get16be(s) != 3) {
-       stbi__rewind( s );
-       return 0;
-   }
-   *comp = 4;
-   return 1;
-}
-
-static int stbi__psd_is16(stbi__context *s)
-{
-   int channelCount, depth;
-   if (stbi__get32be(s) != 0x38425053) {
-       stbi__rewind( s );
-       return 0;
-   }
-   if (stbi__get16be(s) != 1) {
-       stbi__rewind( s );
-       return 0;
-   }
-   stbi__skip(s, 6);
-   channelCount = stbi__get16be(s);
-   if (channelCount < 0 || channelCount > 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   STBI_NOTUSED(stbi__get32be(s));
-   STBI_NOTUSED(stbi__get32be(s));
-   depth = stbi__get16be(s);
-   if (depth != 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   return 1;
-}
-#endif
-
-#ifndef STBI_NO_PIC
-static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int act_comp=0,num_packets=0,chained,dummy;
-   stbi__pic_packet packets[10];
-
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-
-   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) {
-      stbi__rewind(s);
-      return 0;
-   }
-
-   stbi__skip(s, 88);
-
-   *x = stbi__get16be(s);
-   *y = stbi__get16be(s);
-   if (stbi__at_eof(s)) {
-      stbi__rewind( s);
-      return 0;
-   }
-   if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) {
-      stbi__rewind( s );
-      return 0;
-   }
-
-   stbi__skip(s, 8);
-
-   do {
-      stbi__pic_packet *packet;
-
-      if (num_packets==sizeof(packets)/sizeof(packets[0]))
-         return 0;
-
-      packet = &packets[num_packets++];
-      chained = stbi__get8(s);
-      packet->size    = stbi__get8(s);
-      packet->type    = stbi__get8(s);
-      packet->channel = stbi__get8(s);
-      act_comp |= packet->channel;
-
-      if (stbi__at_eof(s)) {
-          stbi__rewind( s );
-          return 0;
-      }
-      if (packet->size != 8) {
-          stbi__rewind( s );
-          return 0;
-      }
-   } while (chained);
-
-   *comp = (act_comp & 0x10 ? 4 : 3);
-
-   return 1;
-}
-#endif
-
-// *************************************************************************************************
-// Portable Gray Map and Portable Pixel Map loader
-// by Ken Miller
-//
-// PGM: http://netpbm.sourceforge.net/doc/pgm.html
-// PPM: http://netpbm.sourceforge.net/doc/ppm.html
-//
-// Known limitations:
-//    Does not support comments in the header section
-//    Does not support ASCII image data (formats P2 and P3)
-
-#ifndef STBI_NO_PNM
-
-static int      stbi__pnm_test(stbi__context *s)
-{
-   char p, t;
-   p = (char) stbi__get8(s);
-   t = (char) stbi__get8(s);
-   if (p != 'P' || (t != '5' && t != '6')) {
-       stbi__rewind( s );
-       return 0;
-   }
-   return 1;
-}
-
-static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *out;
-   STBI_NOTUSED(ri);
-
-   ri->bits_per_channel = stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n);
-   if (ri->bits_per_channel == 0)
-      return 0;
-
-   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   *x = s->img_x;
-   *y = s->img_y;
-   if (comp) *comp = s->img_n;
-
-   if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0))
-      return stbi__errpuc("too large", "PNM too large");
-
-   out = (stbi_uc *) stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0);
-   if (!out) return stbi__errpuc("outofmem", "Out of memory");
-   if (!stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8))) {
-      STBI_FREE(out);
-      return stbi__errpuc("bad PNM", "PNM file truncated");
-   }
-
-   if (req_comp && req_comp != s->img_n) {
-      if (ri->bits_per_channel == 16) {
-         out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, s->img_n, req_comp, s->img_x, s->img_y);
-      } else {
-         out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
-      }
-      if (out == NULL) return out; // stbi__convert_format frees input on failure
-   }
-   return out;
-}
-
-static int      stbi__pnm_isspace(char c)
-{
-   return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r';
-}
-
-static void     stbi__pnm_skip_whitespace(stbi__context *s, char *c)
-{
-   for (;;) {
-      while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
-         *c = (char) stbi__get8(s);
-
-      if (stbi__at_eof(s) || *c != '#')
-         break;
-
-      while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' )
-         *c = (char) stbi__get8(s);
-   }
-}
-
-static int      stbi__pnm_isdigit(char c)
-{
-   return c >= '0' && c <= '9';
-}
-
-static int      stbi__pnm_getinteger(stbi__context *s, char *c)
-{
-   int value = 0;
-
-   while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
-      value = value*10 + (*c - '0');
-      *c = (char) stbi__get8(s);
-      if((value > 214748364) || (value == 214748364 && *c > '7'))
-          return stbi__err("integer parse overflow", "Parsing an integer in the PPM header overflowed a 32-bit int");
-   }
-
-   return value;
-}
-
-static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int maxv, dummy;
-   char c, p, t;
-
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-
-   stbi__rewind(s);
-
-   // Get identifier
-   p = (char) stbi__get8(s);
-   t = (char) stbi__get8(s);
-   if (p != 'P' || (t != '5' && t != '6')) {
-       stbi__rewind(s);
-       return 0;
-   }
-
-   *comp = (t == '6') ? 3 : 1;  // '5' is 1-component .pgm; '6' is 3-component .ppm
-
-   c = (char) stbi__get8(s);
-   stbi__pnm_skip_whitespace(s, &c);
-
-   *x = stbi__pnm_getinteger(s, &c); // read width
-   if(*x == 0)
-       return stbi__err("invalid width", "PPM image header had zero or overflowing width");
-   stbi__pnm_skip_whitespace(s, &c);
-
-   *y = stbi__pnm_getinteger(s, &c); // read height
-   if (*y == 0)
-       return stbi__err("invalid width", "PPM image header had zero or overflowing width");
-   stbi__pnm_skip_whitespace(s, &c);
-
-   maxv = stbi__pnm_getinteger(s, &c);  // read max value
-   if (maxv > 65535)
-      return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images");
-   else if (maxv > 255)
-      return 16;
-   else
-      return 8;
-}
-
-static int stbi__pnm_is16(stbi__context *s)
-{
-   if (stbi__pnm_info(s, NULL, NULL, NULL) == 16)
-	   return 1;
-   return 0;
-}
-#endif
-
-static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp)
-{
-   #ifndef STBI_NO_JPEG
-   if (stbi__jpeg_info(s, x, y, comp)) return 1;
-   #endif
-
-   #ifndef STBI_NO_PNG
-   if (stbi__png_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_GIF
-   if (stbi__gif_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_BMP
-   if (stbi__bmp_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PSD
-   if (stbi__psd_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PIC
-   if (stbi__pic_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PNM
-   if (stbi__pnm_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_HDR
-   if (stbi__hdr_info(s, x, y, comp))  return 1;
-   #endif
-
-   // test tga last because it's a crappy test!
-   #ifndef STBI_NO_TGA
-   if (stbi__tga_info(s, x, y, comp))
-       return 1;
-   #endif
-   return stbi__err("unknown image type", "Image not of any known type, or corrupt");
-}
-
-static int stbi__is_16_main(stbi__context *s)
-{
-   #ifndef STBI_NO_PNG
-   if (stbi__png_is16(s))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PSD
-   if (stbi__psd_is16(s))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PNM
-   if (stbi__pnm_is16(s))  return 1;
-   #endif
-   return 0;
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
-{
-    FILE *f = stbi__fopen(filename, "rb");
-    int result;
-    if (!f) return stbi__err("can't fopen", "Unable to open file");
-    result = stbi_info_from_file(f, x, y, comp);
-    fclose(f);
-    return result;
-}
-
-STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp)
-{
-   int r;
-   stbi__context s;
-   long pos = ftell(f);
-   stbi__start_file(&s, f);
-   r = stbi__info_main(&s,x,y,comp);
-   fseek(f,pos,SEEK_SET);
-   return r;
-}
-
-STBIDEF int stbi_is_16_bit(char const *filename)
-{
-    FILE *f = stbi__fopen(filename, "rb");
-    int result;
-    if (!f) return stbi__err("can't fopen", "Unable to open file");
-    result = stbi_is_16_bit_from_file(f);
-    fclose(f);
-    return result;
-}
-
-STBIDEF int stbi_is_16_bit_from_file(FILE *f)
-{
-   int r;
-   stbi__context s;
-   long pos = ftell(f);
-   stbi__start_file(&s, f);
-   r = stbi__is_16_main(&s);
-   fseek(f,pos,SEEK_SET);
-   return r;
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__info_main(&s,x,y,comp);
-}
-
-STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
-   return stbi__info_main(&s,x,y,comp);
-}
-
-STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__is_16_main(&s);
-}
-
-STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
-   return stbi__is_16_main(&s);
-}
-
-#endif // STB_IMAGE_IMPLEMENTATION
-
-/*
-   revision history:
-      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
-      2.19  (2018-02-11) fix warning
-      2.18  (2018-01-30) fix warnings
-      2.17  (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
-                         1-bit BMP
-                         *_is_16_bit api
-                         avoid warnings
-      2.16  (2017-07-23) all functions have 16-bit variants;
-                         STBI_NO_STDIO works again;
-                         compilation fixes;
-                         fix rounding in unpremultiply;
-                         optimize vertical flip;
-                         disable raw_len validation;
-                         documentation fixes
-      2.15  (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
-                         warning fixes; disable run-time SSE detection on gcc;
-                         uniform handling of optional "return" values;
-                         thread-safe initialization of zlib tables
-      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
-      2.13  (2016-11-29) add 16-bit API, only supported for PNG right now
-      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
-      2.11  (2016-04-02) allocate large structures on the stack
-                         remove white matting for transparent PSD
-                         fix reported channel count for PNG & BMP
-                         re-enable SSE2 in non-gcc 64-bit
-                         support RGB-formatted JPEG
-                         read 16-bit PNGs (only as 8-bit)
-      2.10  (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
-      2.09  (2016-01-16) allow comments in PNM files
-                         16-bit-per-pixel TGA (not bit-per-component)
-                         info() for TGA could break due to .hdr handling
-                         info() for BMP to shares code instead of sloppy parse
-                         can use STBI_REALLOC_SIZED if allocator doesn't support realloc
-                         code cleanup
-      2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA
-      2.07  (2015-09-13) fix compiler warnings
-                         partial animated GIF support
-                         limited 16-bpc PSD support
-                         #ifdef unused functions
-                         bug with < 92 byte PIC,PNM,HDR,TGA
-      2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
-      2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
-      2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
-      2.03  (2015-04-12) extra corruption checking (mmozeiko)
-                         stbi_set_flip_vertically_on_load (nguillemot)
-                         fix NEON support; fix mingw support
-      2.02  (2015-01-19) fix incorrect assert, fix warning
-      2.01  (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2
-      2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG
-      2.00  (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg)
-                         progressive JPEG (stb)
-                         PGM/PPM support (Ken Miller)
-                         STBI_MALLOC,STBI_REALLOC,STBI_FREE
-                         GIF bugfix -- seemingly never worked
-                         STBI_NO_*, STBI_ONLY_*
-      1.48  (2014-12-14) fix incorrectly-named assert()
-      1.47  (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb)
-                         optimize PNG (ryg)
-                         fix bug in interlaced PNG with user-specified channel count (stb)
-      1.46  (2014-08-26)
-              fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG
-      1.45  (2014-08-16)
-              fix MSVC-ARM internal compiler error by wrapping malloc
-      1.44  (2014-08-07)
-              various warning fixes from Ronny Chevalier
-      1.43  (2014-07-15)
-              fix MSVC-only compiler problem in code changed in 1.42
-      1.42  (2014-07-09)
-              don't define _CRT_SECURE_NO_WARNINGS (affects user code)
-              fixes to stbi__cleanup_jpeg path
-              added STBI_ASSERT to avoid requiring assert.h
-      1.41  (2014-06-25)
-              fix search&replace from 1.36 that messed up comments/error messages
-      1.40  (2014-06-22)
-              fix gcc struct-initialization warning
-      1.39  (2014-06-15)
-              fix to TGA optimization when req_comp != number of components in TGA;
-              fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite)
-              add support for BMP version 5 (more ignored fields)
-      1.38  (2014-06-06)
-              suppress MSVC warnings on integer casts truncating values
-              fix accidental rename of 'skip' field of I/O
-      1.37  (2014-06-04)
-              remove duplicate typedef
-      1.36  (2014-06-03)
-              convert to header file single-file library
-              if de-iphone isn't set, load iphone images color-swapped instead of returning NULL
-      1.35  (2014-05-27)
-              various warnings
-              fix broken STBI_SIMD path
-              fix bug where stbi_load_from_file no longer left file pointer in correct place
-              fix broken non-easy path for 32-bit BMP (possibly never used)
-              TGA optimization by Arseny Kapoulkine
-      1.34  (unknown)
-              use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case
-      1.33  (2011-07-14)
-              make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements
-      1.32  (2011-07-13)
-              support for "info" function for all supported filetypes (SpartanJ)
-      1.31  (2011-06-20)
-              a few more leak fixes, bug in PNG handling (SpartanJ)
-      1.30  (2011-06-11)
-              added ability to load files via callbacks to accomidate custom input streams (Ben Wenger)
-              removed deprecated format-specific test/load functions
-              removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway
-              error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha)
-              fix inefficiency in decoding 32-bit BMP (David Woo)
-      1.29  (2010-08-16)
-              various warning fixes from Aurelien Pocheville
-      1.28  (2010-08-01)
-              fix bug in GIF palette transparency (SpartanJ)
-      1.27  (2010-08-01)
-              cast-to-stbi_uc to fix warnings
-      1.26  (2010-07-24)
-              fix bug in file buffering for PNG reported by SpartanJ
-      1.25  (2010-07-17)
-              refix trans_data warning (Won Chun)
-      1.24  (2010-07-12)
-              perf improvements reading from files on platforms with lock-heavy fgetc()
-              minor perf improvements for jpeg
-              deprecated type-specific functions so we'll get feedback if they're needed
-              attempt to fix trans_data warning (Won Chun)
-      1.23    fixed bug in iPhone support
-      1.22  (2010-07-10)
-              removed image *writing* support
-              stbi_info support from Jetro Lauha
-              GIF support from Jean-Marc Lienher
-              iPhone PNG-extensions from James Brown
-              warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva)
-      1.21    fix use of 'stbi_uc' in header (reported by jon blow)
-      1.20    added support for Softimage PIC, by Tom Seddon
-      1.19    bug in interlaced PNG corruption check (found by ryg)
-      1.18  (2008-08-02)
-              fix a threading bug (local mutable static)
-      1.17    support interlaced PNG
-      1.16    major bugfix - stbi__convert_format converted one too many pixels
-      1.15    initialize some fields for thread safety
-      1.14    fix threadsafe conversion bug
-              header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
-      1.13    threadsafe
-      1.12    const qualifiers in the API
-      1.11    Support installable IDCT, colorspace conversion routines
-      1.10    Fixes for 64-bit (don't use "unsigned long")
-              optimized upsampling by Fabian "ryg" Giesen
-      1.09    Fix format-conversion for PSD code (bad global variables!)
-      1.08    Thatcher Ulrich's PSD code integrated by Nicolas Schulz
-      1.07    attempt to fix C++ warning/errors again
-      1.06    attempt to fix C++ warning/errors again
-      1.05    fix TGA loading to return correct *comp and use good luminance calc
-      1.04    default float alpha is 1, not 255; use 'void *' for stbi_image_free
-      1.03    bugfixes to STBI_NO_STDIO, STBI_NO_HDR
-      1.02    support for (subset of) HDR files, float interface for preferred access to them
-      1.01    fix bug: possible bug in handling right-side up bmps... not sure
-              fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all
-      1.00    interface to zlib that skips zlib header
-      0.99    correct handling of alpha in palette
-      0.98    TGA loader by lonesock; dynamically add loaders (untested)
-      0.97    jpeg errors on too large a file; also catch another malloc failure
-      0.96    fix detection of invalid v value - particleman@mollyrocket forum
-      0.95    during header scan, seek to markers in case of padding
-      0.94    STBI_NO_STDIO to disable stdio usage; rename all #defines the same
-      0.93    handle jpegtran output; verbose errors
-      0.92    read 4,8,16,24,32-bit BMP files of several formats
-      0.91    output 24-bit Windows 3.0 BMP files
-      0.90    fix a few more warnings; bump version number to approach 1.0
-      0.61    bugfixes due to Marc LeBlanc, Christopher Lloyd
-      0.60    fix compiling as c++
-      0.59    fix warnings: merge Dave Moore's -Wall fixes
-      0.58    fix bug: zlib uncompressed mode len/nlen was wrong endian
-      0.57    fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available
-      0.56    fix bug: zlib uncompressed mode len vs. nlen
-      0.55    fix bug: restart_interval not initialized to 0
-      0.54    allow NULL for 'int *comp'
-      0.53    fix bug in png 3->4; speedup png decoding
-      0.52    png handles req_comp=3,4 directly; minor cleanup; jpeg comments
-      0.51    obey req_comp requests, 1-component jpegs return as 1-component,
-              on 'test' only check type, not whether we support this variant
-      0.50  (2006-11-19)
-              first released version
-*/
-
-
-/*
-------------------------------------------------------------------------------
-This software is available under 2 licenses -- choose whichever you prefer.
-------------------------------------------------------------------------------
-ALTERNATIVE A - MIT License
-Copyright (c) 2017 Sean Barrett
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-------------------------------------------------------------------------------
-ALTERNATIVE B - Public Domain (www.unlicense.org)
-This is free and unencumbered software released into the public domain.
-Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
-software, either in source code form or as a compiled binary, for any purpose,
-commercial or non-commercial, and by any means.
-In jurisdictions that recognize copyright laws, the author or authors of this
-software dedicate any and all copyright interest in the software to the public
-domain. We make this dedication for the benefit of the public at large and to
-the detriment of our heirs and successors. We intend this dedication to be an
-overt act of relinquishment in perpetuity of all present and future rights to
-this software under copyright law.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-------------------------------------------------------------------------------
-*/

src/RasterIver/kernels/master_kernel.cl

@@ -1,526 +0,0 @@
-static inline float minnn(float a, float b) {
-    return (a < b) ? a : b;
-}
-
-static inline float maxxx(float a, float b) {
-    return (a > b) ? a : b;
-}
-
-float clamppp_float(float x, float lower, float upper) {
-    return x < lower ? lower : (x > upper ? upper : x);
-}
-
-typedef enum {
-    RI_MATERIAL_UNLIT = ((ulong)1 << 0), // should calculate lighting
-    RI_MATERIAL_DONT_CAST_SHADOW = ((ulong)1 << 1), // should cast shadow on other objects
-    RI_MATERIAL_HAS_TEXTURE = ((ulong)1 << 2), // has a texture
-    RI_MATERIAL_HAS_NORMAL_MAP = ((ulong)1 << 3), // has a normal map
-    RI_MATERIAL_HAS_BUMP_MAP = ((ulong)1 << 4), // has a bump map
-    RI_MATERIAL_TRANSPARENT = ((ulong)1 << 5), // has transparency
-    RI_MATERIAL_WIREFRAME = ((ulong)1 << 6), // render as wireframe
-    RI_MATERIAL_DONT_RECEIVE_SHADOW = ((ulong)1 << 7), // should shadows render on it
-    RI_MATERIAL_DONT_DEPTH_TEST = ((ulong)1 << 8), // should check Z buffer (if 1, render on top of everything)
-    RI_MATERIAL_DONT_DEPTH_WRITE = ((ulong)1 << 9), // should write to the Z buffer (if 1, render behind everything)
-    RI_MATERIAL_DOUBLE_SIDED = ((ulong)1 << 10), // ignore backface culling
-} RI_material_properties_enum;
-
-typedef struct {
-    float x;
-    float y;
-} Vec2;
-
-typedef struct {
-    float x;
-    float y;
-    float z;
-    float _pad0;
-} Vec3;
-
-typedef struct {
-    float w;
-    float x;
-    float y;
-    float z;
-} Vec4;
-
-typedef struct {
-    uchar a;
-    uchar r;
-    uchar g;
-    uchar b;
-} ColorARGB;
-
-typedef struct {
-    ColorARGB albedo;
-    int textureOffset;
-    int normalMapOffset;
-    int bumpMapOffset;
-    ulong properties;
-} Material;
-
-typedef struct {
-    Vec3 position;
-    Vec3 scale;
-    Vec4 rotation;
-} Transform;
-
-typedef struct {
-    int transformedVertexOffset;
-    int transformedNormalOffset;
-    int triangleCount;
-    int vertexCount;
-    int normalCount;
-    int uvCount;
-    int triangleOffset;
-    int vertexOffset;
-    int normalOffset;
-    int uvOffset;
-} ModelInfo;
-
-typedef struct {
-    Transform transform;
-    ModelInfo modelInfo;
-    int id;
-    int _pad1;
-    Material material;
-    int _pad2;
-    int _pad3;
-} Object;
-
-int is_intersecting(float a, float b, float c, float d, float p, float q, float r, float s) { 
-    float det, gamma, lambda; 
-    
-    det = (c - a) * (s - q) - (r - p) * (d - b); 
-    
-    if (det == 0) { 
-        return 1; 
-    }  
-    else { 
-        lambda = ((s - q) * (r - a) + (p - r) * (s - b)) / det; 
-        gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det; 
-        return (0 < lambda && lambda < 1) && (0 < gamma && gamma < 1); 
-    } 
-} 
-
-void norm(float dest[2], float a[2]){ 
-    float magnitude = sqrt(a[0] * a[0] + a[1] * a[1]); 
-    
-    dest[0] = a[0] / magnitude; 
-    dest[1] = a[1] / magnitude; 
-    } 
-    
-    void sub(float dest[2], float a[2], float b[2]){ 
-    dest[0] = a[0] - b[0]; 
-    dest[1] = a[1] - b[1]; 
-    } 
-    
-    void add(float dest[2], float a[2], float b[2]){ 
-    dest[0] = a[0] + b[0]; 
-    dest[1] = a[1] + b[1]; 
-} 
-
-inline int clamppp(int x, int lower, int upper) {
-    return x < lower ? lower : (x > upper ? upper : x);
-}
-
-void rotate_quaternion(float *x, float *y, float *z, float r_x, float r_y, float r_z){
-
-};
-
-void rotate_euler(float *x, float *y, float *z, float r_x, float r_y, float r_z){
-    float cx = cos(r_x), sx = sin(r_x);
-    float cy = cos(r_y), sy = sin(r_y);
-    float cz = cos(r_z), sz = sin(r_z);
-
-    float matrix[3][3] = {
-        {
-            cy * cz,
-            -cy * sz,
-            sy
-        },
-        {
-            sx * sy * cz + cx * sz,
-            -sx * sy * sz + cx * cz,
-            -sx * cy
-        },
-        {
-            -cx * sy * cz + sx * sz,
-            cx * sy * sz + sx * cz,
-            cx * cy
-        }
-    };
-    
-    float temp_x = matrix[0][0] * *x + matrix[0][1] * *y + matrix[0][2] * *z;
-    float temp_y = matrix[1][0] * *x + matrix[1][1] * *y + matrix[1][2] * *z;
-    float temp_z = matrix[2][0] * *x + matrix[2][1] * *y + matrix[2][2] * *z;
-
-    *x = temp_x;
-    *y = temp_y;
-    *z = temp_z;
-};
-
-Vec2 lerp(Vec2 pos1, Vec2 pos2, float fraction){
-    Vec2 result;
-
-    float w0 = 1.0 - fraction;
-    float w1 = fraction;
-
-    result.x = pos1.x * w0 + pos2.x * w1;
-    result.y = pos1.y * w0 + pos2.y * w1;
-
-    return result;
-
-}
-
-__kernel void raster_kernel(__global Object* objects, __global float* transformed_verticies, __global float* transformed_normals, __global float* uvs, __global int* triangles, __global uint* frame_buffer, __global uchar* textures, __global int* texture_info, int object_count, int ri_width, int ri_height, int show_buffer, int frame, float fov, int total_triangle_count, int total_vertex_count, int h_width, int h_height, float wireframe_width){ 
-    frame_buffer[sizeof(Object)] = 0xFF00FFFF;int id_x = get_global_id(0) - h_width; 
-    int id_y = get_global_id(1) - h_height; 
-    
-    float z_pixel = INFINITY; 
-                    unsigned int frame_pixel = 0x22222222; 
-                    
-                    float highest_z = 800;
-                    float lowest_z = 0;
-                    
-                    int has_normals = 1;
-                    int has_uvs = 1;
-                    
-                    float w0;
-                    float w1;
-                    float w2;
-                    
-
-                    for (int i_object = 0; i_object < object_count; i_object++){ 
-                        int base = i_object;
-
-                        ulong material_flags = objects[base].material.properties;
-                        ColorARGB albedo = objects[base].material.albedo;
-
-                        int triangle_count = objects[base].modelInfo.triangleCount;
-                        int triangle_index = objects[base].modelInfo.triangleOffset;
-                        int vertex_index =   objects[base].modelInfo.vertexOffset;
-                        int normal_index =   objects[base].modelInfo.normalOffset;
-                        int uv_index =       objects[base].modelInfo.uvOffset;
-                        int texture_index =  objects[base].material.textureOffset;
-                        int transformed_vertex_index = objects[base].modelInfo.transformedVertexOffset;
-                        int transformed_normal_index =   objects[base].modelInfo.transformedNormalOffset;
-                        
-                        float near_clip = 90;
-
-                        for (int i_triangle = 0; i_triangle < triangle_count; i_triangle++){
-                            int triangle_base = (i_triangle + triangle_index) * 9; 
-
-                            int i0 = (transformed_vertex_index + triangles[triangle_base + 0]) * 3;
-                            int i1 = (transformed_vertex_index + triangles[triangle_base + 1]) * 3;
-                            int i2 = (transformed_vertex_index + triangles[triangle_base + 2]) * 3;
-
-                            int i3 = (transformed_normal_index + triangles[triangle_base + 3]) * 3;
-                            int i4 = (transformed_normal_index + triangles[triangle_base + 4]) * 3;
-                            int i5 = (transformed_normal_index + triangles[triangle_base + 5]) * 3;
-
-                            int i6 = (uv_index + triangles[triangle_base + 6]) * 3;
-                            int i7 = (uv_index + triangles[triangle_base + 7]) * 3;
-                            int i8 = (uv_index + triangles[triangle_base + 8]) * 3;
-                            
-                            float x0 = transformed_verticies[i0 + 0];
-                            
-                            float z0 = transformed_verticies[i0 + 2];   
-                            float z1 = transformed_verticies[i1 + 2];
-                            float z2 = transformed_verticies[i2 + 2];
-                            
-                            float y0 = transformed_verticies[i0 + 1];
-                            float x1 = transformed_verticies[i1 + 0];
-                            float y1 = transformed_verticies[i1 + 1];
-                            float y2 = transformed_verticies[i2 + 1];
-                            float x2 = transformed_verticies[i2 + 0]; 
-                            int clip_z0 = z0 <= near_clip;
-                            int clip_z1 = z1 <= near_clip;
-                            int clip_z2 = z2 <= near_clip;
-                            
-                            int clip_count = clip_z0 + clip_z1 + clip_z2;
-
-                            switch (clip_count){
-                                case 0:{ // do nothing, they are all okay >w<
-                                    break;}
-                                
-                                case 1:{ // split triangle into 2
-continue;
-                                    if (clip_z0){
-
-                                    }
-
-                                    break;
-                                }
-
-                                case 2:{ // shrink triangle into 1
-                                    if (!clip_z0){ // z0 is fine
-                                        float percent_clipped_0 = (near_clip - z0) / (z1 - z0);
-                                        float percent_clipped_1 = (near_clip - z0) / (z2 - z0);
-                                        
-                                        Vec2 pos1 = {x0, y0};
-                                        Vec2 pos2 = {x1, y1};
-
-                                        Vec2 p1 = lerp(pos1, pos2, percent_clipped_0);
-
-                                        pos1.x = x2;
-                                        pos1.y = y2;
-
-                                        Vec2 p2 = lerp(pos1, pos2, percent_clipped_1);
-
-                                        x1 = p1.x;
-                                        y1 = p1.y;
-
-                                        x2 = p2.x;
-                                        y2 = p2.y;
-
-                                        z1 = near_clip;
-                                        z2 = near_clip;
-
-                                        break;
-                                    }
-                                    
-                                    if (!clip_z1){
-                                        float percent_clipped_0 = (near_clip - z1) / (z0 - z1);
-                                        float percent_clipped_1 = (near_clip - z1) / (z2 - z1);
-                                        
-                                        Vec2 pos1 = {x1, y1};
-                                        Vec2 pos2 = {x0, y0};
-                                        
-                                        Vec2 p1 = lerp(pos1, pos2, percent_clipped_0);
-                                        
-                                        pos1.x = x2;
-                                        pos1.y = y2;
-                                        
-                                        Vec2 p2 = lerp(pos1, pos2, percent_clipped_1);
-                                        
-                                        x0 = p1.x;
-                                        y0 = p1.y;
-                                        
-                                        x2 = p2.x;
-                                        y2 = p2.y;
-                                        
-                                        z0 = near_clip;
-                                        z2 = near_clip;
-                                        material_flags = 0;
-                                        break;
-                                    }
-
-                                    if (!clip_z2){
-                                        float percent_clipped_0 = (near_clip - z2) / (z1 - z2);
-                                        float percent_clipped_1 = (near_clip - z2) / (z0 - z2);
-                                        
-                                        Vec2 pos1 = {x2, y2};
-                                        Vec2 pos2 = {x1, y1};
-
-                                        Vec2 p1 = lerp(pos1, pos2, percent_clipped_0);
-
-                                        pos1.x = x0;
-                                        pos1.y = y0;
-
-                                        Vec2 p2 = lerp(pos1, pos2, percent_clipped_1);
-
-                                        x1 = p1.x;
-                                        y1 = p1.y;
-
-                                        x0 = p2.x;
-                                        y0 = p2.y;
-
-                                        z1 = near_clip;
-                                        z0 = near_clip;
-                                        break;
-                                    }
-                                }
-
-                                case 3:{ // lost cause, exit
-                                    continue;
-                                }
-
-                                default: { // shouldn't happen
-                                    continue;
-                                }
-                            }
-                            
-                            
-                            if (i3 < 0 || i4 < 0 || i5 < 0){
-                                has_normals = 0;
-                            }
-                            if (i6 < 0 || i7 < 0 || i8 < 0){
-                                has_uvs = 0;
-                            }
-                            
-                            if (isinf(x0) || isinf(y0) || isinf(z0) || isinf(x1) || isinf(y1) || isinf(z1) || isinf(x2) || isinf(y2) || isinf(z2)){
-                                continue;
-                            }
-                            
-                            float smallest_x = x0; 
-                            float largest_x = x0; 
-                            float smallest_y = y0; 
-                            float largest_y = y0; 
-                            
-                            if (x0 > largest_x) largest_x = x0;
-                            if (x1 > largest_x) largest_x = x1;
-                            if (x2 > largest_x) largest_x = x2;
-                            
-                            if (x0 < smallest_x) smallest_x = x0;
-                            if (x1 < smallest_x) smallest_x = x1;
-                            if (x2 < smallest_x) smallest_x = x2;
-                            
-                            if (y0 > largest_y) largest_y = y0;
-                            if (y1 > largest_y) largest_y = y1;
-                            if (y2 > largest_y) largest_y = y2;
-                            
-                            if (y0 < smallest_y) smallest_y = y0;
-                            if (y1 < smallest_y) smallest_y = y1;
-                            if (y2 < smallest_y) smallest_y = y2;
-                            
-                            smallest_x = minnn(smallest_x, 0); 
-                            largest_x = maxxx(largest_x, ri_width);  
-                            smallest_y = minnn(smallest_y, 0); 
-                            largest_y = maxxx(largest_y, ri_height); 
-                            
-                            if (id_x >= smallest_x && id_x <= largest_x && id_y >= smallest_y && id_y <= largest_y){ 
-                                float denominator = (y1 - y2) * (x0 - x2) + (x2 - x1) * (y0 - y2); 
-                                
-                                if (!(material_flags & RI_MATERIAL_DOUBLE_SIDED) && denominator >= 0) { 
-                                    continue; 
-                                } 
-                                
-                                w0 = ((y1 - y2) * (id_x - x2) + (x2 - x1) * (id_y - y2)) / denominator; 
-                                w1 = ((y2 - y0) * (id_x - x0) + (x0 - x2) * (id_y - y0)) / denominator; 
-                                w2 = 1.0 - w0 - w1; 
-                                
-                                if (!(w0 > 0 && w1 > 0 && w2 > 0)){
-                                    continue;
-                                }
-
-                                if (material_flags & RI_MATERIAL_WIREFRAME && (w0 >= wireframe_width && w1 >= wireframe_width && w2 >= wireframe_width)){
-                                    continue;
-                                }
-
-                                float w_over_z = (w0 / z0 + w1 / z1 + w2 / z2); 
-                                float z = 1.0 / w_over_z;
-
-                                if (z < z_pixel){ 
-                                    z_pixel = z; 
-                                    
-                                    float n_x0 = transformed_normals[i3 + 0];
-                                    float n_y0 = transformed_normals[i3 + 1];
-                                    float n_z0 = transformed_normals[i3 + 2];
-                                    
-                                    float n_x1 = transformed_normals[i4 + 0];
-                                    float n_y1 = transformed_normals[i4 + 1];
-                                    float n_z1 = transformed_normals[i4 + 2];
-                                    
-                                    float n_x2 = transformed_normals[i5 + 0];
-                                    float n_y2 = transformed_normals[i5 + 1];
-                                    float n_z2 = transformed_normals[i5 + 2];
-                                    
-                                    float u_x0 = uvs[i6 + 0];
-                                    float u_y0 = uvs[i6 + 1];
-                                    float u_z0 = uvs[i6 + 2];
-                                    
-                                    float u_x1 = uvs[i7 + 0];
-                                    float u_y1 = uvs[i7 + 1];
-                                    float u_z1 = uvs[i7 + 2];
-                                    
-                                    float u_x2 = uvs[i8 + 0];
-                                    float u_y2 = uvs[i8 + 1];
-                                    float u_z2 = uvs[i8 + 2];
-                                    
-                                    switch (show_buffer){
-                                        case 0:{
-                                            if (!(material_flags & RI_MATERIAL_HAS_TEXTURE)){
-                                                frame_pixel = (albedo.a << 24) | (albedo.r << 16) | (albedo.g << 8) | albedo.b;
-                                            
-                                                break;
-                                            }
-
-                                            double ux = (w0 * (u_x0 / z0) + w1 * (u_x1 / z1) + w2 * (u_x2 / z2)) / w_over_z;
-                                            double uy = (w0 * (u_y0 / z0) + w1 * (u_y1 / z1) + w2 * (u_y2 / z2)) / w_over_z;
-                                            
-                                            int texture_width = texture_info[texture_index * 3];
-                                            int texture_height = texture_info[texture_index * 3 + 1];
-                                            int texture_value_offset = texture_info[texture_index * 3 + 2];
-                                            
-                                            int ix = maxxx((int)(ux * texture_width), 0);
-                                            int iy = maxxx((int)(uy * texture_height), 0);
-                                            
-                                            int uv_pixel = (iy * texture_width + ix) * 4 + texture_value_offset;
-
-                                            if (uv_pixel >= texture_width * texture_height * 4 + texture_value_offset)break;
-                                            
-                                            unsigned char r = textures[uv_pixel + 0];
-                                            unsigned char g = textures[uv_pixel + 1];
-                                            unsigned char b = textures[uv_pixel + 2];
-                                            unsigned char a = textures[uv_pixel + 3];
-                                            
-                                            frame_pixel = (a << 24) | (r << 16) | (g << 8) | b;
-                                            
-                                            break;}
-                                        case 1:{
-                                            float z = clamppp_float(z_pixel, 0.0f, highest_z);
-                                            
-                                            float norm_z = z / highest_z;
-                                            
-                                            unsigned char intensity = (unsigned char)(norm_z * 255.0f);
-                                            
-                                            frame_pixel = 0xFF000000 | (intensity << 16) | (intensity << 8) | intensity;
-                                            
-                                            break;}
-                                        case 2:{
-                                            float nx = (w0 * (n_x0 / z0) + w1 * (n_x1 / z1) + w2 * (n_x2 / z2)) / w_over_z;
-                                            float ny = (w0 * (n_y0 / z0) + w1 * (n_y1 / z1) + w2 * (n_y2 / z2)) / w_over_z;
-                                            float nz = (w0 * (n_z0 / z0) + w1 * (n_z1 / z1) + w2 * (n_z2 / z2)) / w_over_z;
-                                            
-                                            nx = clamppp_float((nx * 0.5f + 0.5f) * 255.0f, 0.0f, 255.0f);
-                                            ny = clamppp_float((ny * 0.5f + 0.5f) * 255.0f, 0.0f, 255.0f);
-                                            nz = clamppp_float((nz * 0.5f + 0.5f) * 255.0f, 0.0f, 255.0f);
-                                            
-                                            unsigned char r = (unsigned char)nx;
-                                            unsigned char g = (unsigned char)ny;
-                                            unsigned char b = (unsigned char)nz;
-                                            
-                                            if (!has_normals){
-                                                r = 20;
-                                                g = 20;
-                                                b = 20;
-                                            }
-                                            
-                                            frame_pixel = 0xFF000000 | (r << 16) | (g << 8) | b;
-                                            
-                                            break;}
-                                        case 3:{
-                                            float ux = w0 * u_x0 + w1 * u_x1 + w2 * u_x2;
-                                            float uy = w0 * u_y0 + w1 * u_y1 + w2 * u_y2;
-                                            
-                                            unsigned char r = (unsigned char)clamppp_float(ux * 255.0f, 0.0f, 255.0f);
-                                            unsigned char g = (unsigned char)clamppp_float(uy * 255.0f, 0.0f, 255.0f);
-                                            unsigned char b = 0;
-                                            
-                                            if (!has_uvs){
-                                                r = 20;
-                                                g = 20;
-                                                b = 20;
-                                            }
-                                            
-                                            frame_pixel = 0xFF000000 | (r << 16) | (g << 8) | b;
-                                            
-                                            break;}
-                                        default:{
-                                            frame_pixel = 0xFF00FFFF;
-                                            
-                                            break;}
-                                    }
-                                } 
-                            }
-                        }
-                    }
-                    
-                    int pixel_coord = (ri_height * 0.5 - id_y) * ri_width + id_x + ri_width * 0.5;
-                    
-                    if (pixel_coord >= ri_width * ri_height || pixel_coord < 0){
-                        return;
-                    }
-                    
-                    frame_buffer[pixel_coord] = frame_pixel; 
-                }

src/RasterIver/kernels/non_master_kernel.cl

@@ -1,152 +0,0 @@
-static inline float minnn(float a, float b) {
-    return (a < b) ? a : b;
-}
-
-static inline float maxxx(float a, float b) {
-    return (a > b) ? a : b;
-}
-
-
-int is_intersecting(float a, float b, float c, float d, float p, float q, float r, float s) { 
-    float det, gamma, lambda; 
-    
-    det = (c - a) * (s - q) - (r - p) * (d - b); 
-    
-    if (det == 0) { 
-        return 1; 
-    }  
-    else { 
-        lambda = ((s - q) * (r - a) + (p - r) * (s - b)) / det; 
-        gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det; 
-        return (0 < lambda && lambda < 1) && (0 < gamma && gamma < 1); 
-    } 
-} 
-
-void norm(float dest[2], float a[2]){ 
-    float magnitude = sqrt(a[0] * a[0] + a[1] * a[1]); 
-    
-    dest[0] = a[0] / magnitude; 
-    dest[1] = a[1] / magnitude; 
-    } 
-    
-    void sub(float dest[2], float a[2], float b[2]){ 
-    dest[0] = a[0] - b[0]; 
-    dest[1] = a[1] - b[1]; 
-    } 
-    
-    void add(float dest[2], float a[2], float b[2]){ 
-    dest[0] = a[0] + b[0]; 
-    dest[1] = a[1] + b[1]; 
-} 
-
-__kernel void raster_kernel(__global float* polygons, __global uint* frame_buffer, int polygon_count, int width, int height, int show_z_buffer, float highest_z){ 
-    int id_x = get_global_id(0); 
-    int id_y = get_global_id(1); 
-    
-    float z_pixel = 0; 
-    uint frame_pixel = 0x22222222; 
-    
-    float biggest_z = 0;
-    
-    for (int polygon = 0; polygon < polygon_count; polygon++){ 
-        int base = polygon * 9; 
-        float x0 = polygons[base]; 
-        float y0 = polygons[base + 1]; 
-        float z0 = polygons[base + 2]; 
-        float x1 = polygons[base + 3]; 
-        float y1 = polygons[base + 4]; 
-        float z1 = polygons[base + 5]; 
-        float x2 = polygons[base + 6]; 
-        float y2 = polygons[base + 7]; 
-        float z2 = polygons[base + 8]; 
-        
-        if (isinf(x0) || isinf(y0) || isinf(z0) || isinf(x1) || isinf(y1) || isinf(z1) || isinf(x2) || isinf(y2) || isinf(z2)){
-            return;
-        }
-        
-        float smallest_x = x0; 
-        float largest_x = x0; 
-        float smallest_y = y0; 
-        float largest_y = y0; 
-        
-        for (int point = 0; point < 3; point++){ 
-            float x = polygons[base + point * 3]; 
-            float y = polygons[base + point * 3 + 1]; 
-            
-            if (x > largest_x){ 
-                largest_x = x; 
-            } 
-            
-            if (x < smallest_x){ 
-                smallest_x = x; 
-            } 
-            
-            if (y > largest_y){ 
-                largest_y = y; 
-            } 
-            
-            if (y < smallest_y){
-                smallest_y = y;
-            } 
-        } 
-        
-        smallest_x = minnn(smallest_x, 0); 
-        largest_x = maxxx(largest_x, width); 
-        smallest_y = minnn(smallest_y, 0); 
-        largest_y = maxxx(largest_y, height); 
-        
-        if (id_x >= smallest_x && id_x <= largest_x && id_y >= smallest_y && id_y <= largest_y){ 
-            int intersections = 0; 
-            
-            intersections += is_intersecting(id_x, id_y, 10000, 100000, x0, y0, x1, y1); 
-            intersections += is_intersecting(id_x, id_y, 10000, 100000, x1, y1, x2, y2); 
-            intersections += is_intersecting(id_x, id_y, 10000, 100000, x2, y2, x0, y0); 
-            
-            if (intersections % 2 == 0){ 
-                continue; 
-            } 
-            
-            float denominator = (y1 - y2) * (x0 - x2) + (x2 - x1) * (y0 - y2); 
-            float w0 = ((y1 - y2) * (id_x - x2) + (x2 - x1) * (id_y - y2)) / denominator; 
-            float w1 = ((y2 - y0) * (id_x - x0) + (x0 - x2) * (id_y - y2)) / denominator; 
-            float w2 = 1.0 - w0 - w1; 
-            
-            if (denominator < 0) { 
-                w0 = -w0; 
-                w1 = -w1; 
-                w2 = -w2; 
-                denominator = -denominator; 
-            } 
-            
-            float z = w0 * z0 + w1 * z1 + w2 * z2; 
-            
-            if (z < 0){ 
-                z *= -1; 
-            } 
-            
-            if (z > z_pixel){ 
-                z_pixel = z; 
-            } 
-             
-            else { 
-                continue; 
-            } 
-            
-            frame_pixel = 0xFFFFFFFF / polygon_count * (polygon + 1); 
-        } 
-    } 
-    
-    if (id_y * width + id_x > width * height){
-    return;
-    }
-    frame_buffer[id_y * width + id_x] = frame_pixel; 
-    
-    if (!show_z_buffer){return;}
-    
-    float z = clamp(z_pixel, 0.0f, highest_z);
-    
-    float norm_z = z / highest_z;
-    
-    uchar intensity = (uchar)(norm_z * 255.0f);
-    
-    frame_buffer[id_y * width + id_x] = 0xFF000000 | (intensity << 16) | (intensity << 8) | intensity;}

src/RasterIver/kernels/transformer.cl

@@ -1,215 +0,0 @@
-static inline float minnn(float a, float b) {
-    return (a < b) ? a : b;
-}
-
-static inline float maxxx(float a, float b) {
-    return (a > b) ? a : b;
-}
-
-typedef struct {
-    float x;
-    float y;
-    float z;
-    float _pad0;
-} Vec3;
-
-typedef struct {
-    float w;
-    float x;
-    float y;
-    float z;
-} Vec4;
-
-typedef struct {
-    uchar a;
-    uchar r;
-    uchar g;
-    uchar b;
-} ColorARGB;
-
-typedef struct {
-    ColorARGB albedo;
-    int textureOffset;
-    int normalMapOffset;
-    int bumpMapOffset;
-    ulong properties;
-} Material;
-
-typedef struct {
-    Vec3 position;
-    Vec3 scale;
-    Vec4 rotation;
-} Transform;
-
-typedef struct {
-    int transformedVertexOffset;
-    int transformedNormalOffset;
-    int triangleCount;
-    int vertexCount;
-    int normalCount;
-    int uvCount;
-    int triangleOffset;
-    int vertexOffset;
-    int normalOffset;
-    int uvOffset;
-} ModelInfo;
-
-typedef struct {
-    Transform transform;
-    ModelInfo modelInfo;
-    int id;
-    int _pad1;
-    Material material;
-    int _pad2;
-    int _pad3;
-} Object;
-
-inline int clamppp(int x, int lower, int upper) {
-    return x < lower ? lower : (x > upper ? upper : x);
-}
-
-void rotate_quaternion(float *x, float *y, float *z, float r_x, float r_y, float r_z){
-
-};
-
-void rotate_euler(float *x, float *y, float *z, float r_x, float r_y, float r_z){
-    float cx = cos(r_x), sx = sin(r_x);
-    float cy = cos(r_y), sy = sin(r_y);
-    float cz = cos(r_z), sz = sin(r_z);
-
-    float matrix[3][3] = {
-        {
-            cy * cz,
-            -cy * sz,
-            sy
-        },
-        {
-            sx * sy * cz + cx * sz,
-            -sx * sy * sz + cx * cz,
-            -sx * cy
-        },
-        {
-            -cx * sy * cz + sx * sz,
-            cx * sy * sz + sx * cz,
-            cx * cy
-        }
-    };
-    
-    float temp_x = matrix[0][0] * *x + matrix[0][1] * *y + matrix[0][2] * *z;
-    float temp_y = matrix[1][0] * *x + matrix[1][1] * *y + matrix[1][2] * *z;
-    float temp_z = matrix[2][0] * *x + matrix[2][1] * *y + matrix[2][2] * *z;
-
-    *x = temp_x;
-    *y = temp_y;
-    *z = temp_z;
-};
-
-__kernel void transformer_kernel(__global Object* objects, __global float* verticies, __global float* normals, __global int* triangles, __global float* transformed_verticies, __global float* transformed_normals, float fov, int width, int height, __global uint* frame_buffer, int ri_h_width, int ri_h_height){ 
-    frame_buffer[sizeof(Object)] = 0xFFFFFFFF;int id_x = get_global_id(0);
-    
-    float vertical_fov_factor = height / tan(0.5 * fov);
-    float horizontal_fov_factor = width / tan(0.5 * fov);
-    
-    int has_normals = 1;
-    int base = id_x;
-
-
-float object_x =   objects[base].transform.position.x;
-float object_y =   objects[base].transform.position.y;
-float object_z =   objects[base].transform.position.z;
-float object_r_x = objects[base].transform.rotation.w;
-float object_r_y = objects[base].transform.rotation.x;
-float object_r_z = objects[base].transform.rotation.y;
-float object_r_w = objects[base].transform.rotation.z;
-float object_s_x = objects[base].transform.scale.x; 
-float object_s_y = objects[base].transform.scale.y; 
-float object_s_z = objects[base].transform.scale.z; 
-
-int triangle_count = objects[base].modelInfo.triangleCount;
-int triangle_index = objects[base].modelInfo.triangleOffset;
-int vertex_index =   objects[base].modelInfo.vertexOffset;
-int transformed_vertex_index = objects[base].modelInfo.transformedVertexOffset;
-int normal_index =   objects[base].modelInfo.normalOffset;
-int transformed_normal_index =   objects[base].modelInfo.transformedNormalOffset;
-
-for (int triangle = 0; triangle < triangle_count; triangle++){
-int triangle_base = (triangle + triangle_index) * 9; 
-
-int i0 = (vertex_index + triangles[triangle_base + 0]) * 3;
-int i1 = (vertex_index + triangles[triangle_base + 1]) * 3;
-int i2 = (vertex_index + triangles[triangle_base + 2]) * 3;
-
-int i3 = (normal_index + triangles[triangle_base + 3]) * 3;
-int i4 = (normal_index + triangles[triangle_base + 4]) * 3;
-int i5 = (normal_index + triangles[triangle_base + 5]) * 3;
-
-float x0 = verticies[i0 + 0] * object_s_x;
-float y0 = verticies[i0 + 1] * object_s_y;
-float z0 = verticies[i0 + 2] * object_s_z;
-float x1 = verticies[i1 + 0] * object_s_x;
-float y1 = verticies[i1 + 1] * object_s_y;
-float z1 = verticies[i1 + 2] * object_s_z;
-float x2 = verticies[i2 + 0] * object_s_x;
-float y2 = verticies[i2 + 1] * object_s_y;
-float z2 = verticies[i2 + 2] * object_s_z;
-float n_x0 = normals[i3 + 0];
-float n_y0 = normals[i3 + 1];
-float n_z0 = normals[i3 + 2];
-float n_x1 = normals[i4 + 0];
-float n_y1 = normals[i4 + 1];
-float n_z1 = normals[i4 + 2];
-float n_x2 = normals[i5 + 0];
-float n_y2 = normals[i5 + 1];
-float n_z2 = normals[i5 + 2];
-
-if (i3 < 0 || i4 < 0 || i5 < 0){
- //   has_normals = 0;
-}
-
-if (isinf(x0) || isinf(y0) || isinf(z0) || isinf(x1) || isinf(y1) || isinf(z1) || isinf(x2) || isinf(y2) || isinf(z2)){
-continue;
-}
-
-rotate_euler(&x0, &y0, &z0, object_r_x, object_r_y, object_r_z);
-rotate_euler(&x1, &y1, &z1, object_r_x, object_r_y, object_r_z);
-rotate_euler(&x2, &y2, &z2, object_r_x, object_r_y, object_r_z);
-
-rotate_euler(&n_x0, &n_y0, &n_z0, object_r_x, object_r_y, object_r_z);
-rotate_euler(&n_x1, &n_y1, &n_z1, object_r_x, object_r_y, object_r_z);
-rotate_euler(&n_x2, &n_y2, &n_z2, object_r_x, object_r_y, object_r_z);
-
-z0 = (z0 + object_z);
-x0 = (x0 + object_x) / z0 * horizontal_fov_factor;
-y0 = (y0 + object_y) / z0 * vertical_fov_factor;
-z1 = (z1 + object_z);
-x1 = (x1 + object_x) / z1 * horizontal_fov_factor;
-y1 = (y1 + object_y) / z1 * vertical_fov_factor;
-z2 = (z2 + object_z);
-y2 = (y2 + object_y) / z2 * horizontal_fov_factor;
-x2 = (x2 + object_x) / z2 * vertical_fov_factor;
-
-// if ((x0 < -ri_h_width && x1 < -ri_h_width && x2 < -ri_h_width) || (y0 < -ri_h_height && y1 < -ri_h_height && y2 < -ri_h_height) || (x0 >= ri_h_width && x1 >= ri_h_width && x2 >= ri_h_width) || (y0 >= ri_h_height && y1 >= ri_h_height && y2 >= ri_h_height)){
-    // transformed_verticies[(triangles[triangle_base + 0] + transformed_vertex_index) * 3 + 0] = 999999;
-// }
-// else{
-    transformed_verticies[(triangles[triangle_base + 0] + transformed_vertex_index) * 3 + 0] = x0;
-    transformed_verticies[(triangles[triangle_base + 0] + transformed_vertex_index) * 3 + 1] = y0;
-    transformed_verticies[(triangles[triangle_base + 0] + transformed_vertex_index) * 3 + 2] = z0;
-    transformed_verticies[(triangles[triangle_base + 1] + transformed_vertex_index) * 3 + 0] = x1;
-    transformed_verticies[(triangles[triangle_base + 1] + transformed_vertex_index) * 3 + 1] = y1;
-    transformed_verticies[(triangles[triangle_base + 1] + transformed_vertex_index) * 3 + 2] = z1;
-    transformed_verticies[(triangles[triangle_base + 2] + transformed_vertex_index) * 3 + 0] = x2;
-    transformed_verticies[(triangles[triangle_base + 2] + transformed_vertex_index) * 3 + 1] = y2;
-    transformed_verticies[(triangles[triangle_base + 2] + transformed_vertex_index) * 3 + 2] = z2;
-    
-    transformed_normals[(triangles[triangle_base + 0] + transformed_normal_index) * 3 + 0] = n_x0;
-    transformed_normals[(triangles[triangle_base + 0] + transformed_normal_index) * 3 + 1] = n_y0;
-    transformed_normals[(triangles[triangle_base + 0] + transformed_normal_index) * 3 + 2] = n_z0;
-    transformed_normals[(triangles[triangle_base + 1] + transformed_normal_index) * 3 + 0] = n_x1;
-    transformed_normals[(triangles[triangle_base + 1] + transformed_normal_index) * 3 + 1] = n_y1;
-    transformed_normals[(triangles[triangle_base + 1] + transformed_normal_index) * 3 + 2] = n_z1;
-    transformed_normals[(triangles[triangle_base + 2] + transformed_normal_index) * 3 + 0] = n_x2;
-    transformed_normals[(triangles[triangle_base + 2] + transformed_normal_index) * 3 + 1] = n_y2;
-    transformed_normals[(triangles[triangle_base + 2] + transformed_normal_index) * 3 + 2] = n_z2;
-// }
-}}

src/RasterIver/source code/non-lib src/main_CPU.c

@@ -1,196 +0,0 @@
-#include "stdlib.h"
-#include "SDL2/SDL.h"
-#include "math.h"
-#include "time.h"
-#include <CL/cl.h>
-
-const int WIDTH = 800;
-const int HEIGHT = 800;
-const int POLYGON_SIZE = sizeof(float) * 3 * 3;
-const int POLYGONS = 10;
-
-int is_intersecting(int a, int b, int c, int d, int p, int q, int r, int s) {
-    float det, gamma, lambda;
-    
-    det = (c - a) * (s - q) - (r - p) * (d - b);
-    
-    if (det == 0) {
-        return 1;
-    } 
-    else {
-        lambda = ((s - q) * (r - a) + (p - r) * (s - b)) / det;
-        gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det;
-        return (0 < lambda && lambda < 1) && (0 < gamma && gamma < 1);
-    }
-}
-
-void norm(float dest[2], float a[2]){
-    float magnitude = sqrt((pow(a[0], 2) + pow(a[1], 2)));
-    
-    dest[0] = a[0] / magnitude;
-    dest[1] = a[1] / magnitude;
-}
-
-void sub(float dest[2], float a[2], float b[2]){
-    dest[0] = a[0] - b[0];
-    dest[1] = a[1] - b[1];
-}
-
-void add(float dest[2], float a[2], float b[2]){
-    dest[0] = a[0] + b[0];
-    dest[1] = a[1] + b[1];
-}
-
-int main(){
-    srand(time(NULL));
-
-    float polygons[POLYGONS][3][3];
-
-    SDL_Init(SDL_INIT_VIDEO);
-    SDL_Window* window = SDL_CreateWindow("Rasterizer", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH, HEIGHT, SDL_WINDOW_OPENGL);
-    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
-    SDL_Texture* texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT);
-
-    int running = 1;
-
-    Uint32 frame_buffer[WIDTH * HEIGHT];
-    float z_buffer[WIDTH * HEIGHT];
-
-    int frame = 0;
-
-    Uint32 start_time, frame_time;
-    float fps;
-
-    while (running) {
-        start_time = SDL_GetTicks();
-
-        //if (frame % 1 == 0){
-            for (int p = 0; p < POLYGONS; p++){
-                for (int point = 0; point < 3; point++){
-                    for (int i = 0; i < 3; i++){
-                        polygons[p][point][i] = rand() % WIDTH + 1;
-                    }
-                }
-            }
-        //}
-
-        for (int i = 0; i < WIDTH * HEIGHT; ++i) {
-            frame_buffer[i] = 0x22222222;
-        }
-
-        memset(&z_buffer, 0, sizeof(float) * WIDTH * HEIGHT);
-
-        SDL_Event event;
-        while (SDL_PollEvent(&event)){
-            switch (event.type){
-                case SDL_QUIT:
-                running = 0;
-            }
-        }
-        
-        for (int polygon = 0; polygon < POLYGONS; polygon++){
-            float x0 = polygons[polygon][0][0];
-            float y0 = polygons[polygon][0][1];
-            float z0 = polygons[polygon][0][2];
-            float x1 = polygons[polygon][1][0];
-            float y1 = polygons[polygon][1][1];
-            float z1 = polygons[polygon][1][2];
-            float x2 = polygons[polygon][2][0];
-            float y2 = polygons[polygon][2][1];
-            float z2 = polygons[polygon][2][2];
-            
-            float smallest_x = x0;
-            float largest_x = x0;
-            float smallest_y = y0;
-            float largest_y = y0;
-            
-            for (int point = 0; point < 3; point++){
-                float x = polygons[polygon][point][0];
-                float y = polygons[polygon][point][1];
-                
-                if (x > largest_x){
-                    largest_x = x;
-                }
-                
-                if (x < smallest_x){
-                    smallest_x = x;
-                }
-                
-                if (y > largest_y){
-                    largest_y = y;
-                }
-                
-                if (y < smallest_y){
-                    smallest_y = y;
-                }
-            }
-            
-            smallest_x = fmin(smallest_x, 0);
-            largest_x = fmax(largest_x, WIDTH);
-            smallest_y = fmin(smallest_y, 0);
-            largest_y = fmax(largest_y, HEIGHT);
-
-            // test every pixel in a rect around the triangle. If it's inside, color it.
-            for (int x = (int)smallest_x; x < largest_x; x++){
-                for (int y = (int)smallest_y; y < largest_y; y++){
-                    int intersections = 0;
-                    
-                    for (int i = 0; i < 3; i++){
-                        intersections += is_intersecting(x, y, 10000, 100000, polygons[polygon][i][0], polygons[polygon][i][1], polygons[polygon][(i + 1) % 3][0], polygons[polygon][(i + 1) % 3][1]);
-                    }
-
-                    if (intersections % 2 == 0){
-                        continue;
-                    }
-
-                    float denominator = (y1 - y2) * (x0 - x2) + (x2 - x1) * (y0 - y2);
-                    float w0 = ((y1 - y2) * (x - x2) + (x2 - x1) * (y - y2)) / denominator;
-                    float w1 = ((y2 - y0) * (x - x0) + (x0 - x2) * (y - y2)) / denominator;
-                    float w2 = 1.0 - w0 - w1;
-
-                    if (denominator < 0) {
-                        w0 = -w0;
-                        w1 = -w1;
-                        w2 = -w2;
-                        denominator = -denominator;
-                    }                    
-
-                    float z = w0 * z0 + w1 * z1 + w2 * z2;
-
-                    
-                                        if (z < 0){
-                                            z *= -1;
-                                        }
-                //    printf("%f\n", z);
-
-                    if (z > z_buffer[y * WIDTH + x]){
-                        z_buffer[y * WIDTH + x] = z;
-                    }
-                    else {
-                        continue;
-                    }
-
-                   frame_buffer[y * WIDTH + x] = 0xFFFFFFFF / POLYGONS * (polygon + 1);
-                }
-            }
-        }
-        
-        SDL_UpdateTexture(texture, NULL, frame_buffer, WIDTH * sizeof(Uint32));
-        
-        SDL_RenderClear(renderer);
-        SDL_RenderCopy(renderer, texture, NULL, NULL);
-        SDL_RenderPresent(renderer);
-        
-        frame++;
-
-        frame_time = SDL_GetTicks()-start_time;
-        fps = (frame_time > 0) ? 1000.0f / frame_time : 0.0f;
-        printf("%f fps\n", fps);
-        printf("%d polygons\n", POLYGONS);
-    }
-    
-    SDL_DestroyTexture(texture);
-    SDL_DestroyRenderer(renderer);
-    SDL_DestroyWindow(window);
-    SDL_Quit();
-}

src/RasterIver/source code/non-lib src/main_GPU_fixed_polygons.c

@@ -1,292 +0,0 @@
-// RasterIver static polygons & not a lib
-
-#include "stdlib.h"
-#include "SDL2/SDL.h"
-#include "math.h"
-#include "time.h"
-#include <CL/cl.h>
-
-const char* kernel_source = " \
-int is_intersecting(float a, float b, float c, float d, float p, float q, float r, float s) { \
-    float det, gamma, lambda; \
-    \
-    det = (c - a) * (s - q) - (r - p) * (d - b); \
-    \
-    if (det == 0) { \
-        return 1; \
-    }  \
-    else { \
-        lambda = ((s - q) * (r - a) + (p - r) * (s - b)) / det; \
-        gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det; \
-        return (0 < lambda && lambda < 1) && (0 < gamma && gamma < 1); \
-    } \
-} \
-\
-void norm(float dest[2], float a[2]){ \
-    float magnitude = sqrt(a[0] * a[0] + a[1] * a[1]); \
-    \
-    dest[0] = a[0] / magnitude; \
-    dest[1] = a[1] / magnitude; \
-    } \
-    \
-    void sub(float dest[2], float a[2], float b[2]){ \
-    dest[0] = a[0] - b[0]; \
-    dest[1] = a[1] - b[1]; \
-    } \
-    \
-    void add(float dest[2], float a[2], float b[2]){ \
-    dest[0] = a[0] + b[0]; \
-    dest[1] = a[1] + b[1]; \
-} \
-\
-__kernel void raster_kernel(__global float* polygons, __global uint* frame_buffer, int POLYGONS, int WIDTH, int HEIGHT, int SHOW_Z_BUFFER){ \
-    int id_x = get_global_id(0); \
-    int id_y = get_global_id(1); \
-    \
-    float z_pixel = 0; \
-    uint frame_pixel = 0x22222222; \
-    \
-    for (int polygon = 0; polygon < POLYGONS; polygon++){ \
-        int base = polygon * 9; \
-        float x0 = polygons[base]; \
-        float y0 = polygons[base + 1]; \
-        float z0 = polygons[base + 2]; \
-        float x1 = polygons[base + 3]; \
-        float y1 = polygons[base + 4]; \
-        float z1 = polygons[base + 5]; \
-        float x2 = polygons[base + 6]; \
-        float y2 = polygons[base + 7]; \
-        float z2 = polygons[base + 8]; \
-        \
-        float smallest_x = x0; \
-        float largest_x = x0; \
-        float smallest_y = y0; \
-        float largest_y = y0; \
-        \
-        for (int point = 0; point < 3; point++){ \
-            float x = polygons[base + point * 3]; \
-            float y = polygons[base + point * 3 + 1]; \
-            \
-            if (x > largest_x){ \
-                largest_x = x; \
-            } \
-            \
-            if (x < smallest_x){ \
-                smallest_x = x; \
-            } \
-            \
-            if (y > largest_y){ \
-                largest_y = y; \
-            } \
-            \
-            if (y < smallest_y){\
-                smallest_y = y;\
-            } \
-        } \
-        \
-        smallest_x = fmin(smallest_x, 0); \
-        largest_x = fmax(largest_x, WIDTH); \
-        smallest_y = fmin(smallest_y, 0); \
-        largest_y = fmax(largest_y, HEIGHT); \
-        \
-        if (id_x >= smallest_x && id_x <= largest_x && id_y >= smallest_y && id_y <= largest_y){ \
-            int intersections = 0; \
-            \
-            intersections += is_intersecting(id_x, id_y, 10000, 100000, x0, y0, x1, y1); \
-            intersections += is_intersecting(id_x, id_y, 10000, 100000, x1, y1, x2, y2); \
-            intersections += is_intersecting(id_x, id_y, 10000, 100000, x2, y2, x0, y0); \
-            \
-            if (intersections % 2 == 0){ \
-                continue; \
-            } \
-            \
-            float denominator = (y1 - y2) * (x0 - x2) + (x2 - x1) * (y0 - y2); \
-            float w0 = ((y1 - y2) * (id_x - x2) + (x2 - x1) * (id_y - y2)) / denominator; \
-            float w1 = ((y2 - y0) * (id_x - x0) + (x0 - x2) * (id_y - y2)) / denominator; \
-            float w2 = 1.0 - w0 - w1; \
-            \
-            if (denominator < 0) { \
-                w0 = -w0; \
-                w1 = -w1; \
-                w2 = -w2; \
-                denominator = -denominator; \
-            } \
-            \
-            float z = w0 * z0 + w1 * z1 + w2 * z2; \
-            \
-            if (z < 0){ \
-                z *= -1; \
-            } \
-            \
-            if (z > z_pixel){ \
-                z_pixel = z; \
-            } \
-            else { \
-                continue; \
-            } \
-            \
-            frame_pixel = 0xFFFFFFFF / POLYGONS * (polygon + 1); \
-        } \
-    } \
-    \
-    frame_buffer[id_y * WIDTH + id_x] = frame_pixel; \
-    \
-    if (!SHOW_Z_BUFFER){return;}\
-    \
-    float z = clamp(z_pixel, 0.0f, 800.0f);\
-    \
-    float norm_z = z / 800.0f;\
-    \
-    uchar intensity = (uchar)(norm_z * 255.0f);\
-    \
-    frame_buffer[id_y * WIDTH + id_x] = 0xFF000000 | (intensity << 16) | (intensity << 8) | intensity;\
-}\n";
-
-void erchk_func(cl_int error, int line, char *file){
-    if (error != CL_SUCCESS){
-        printf("ERROR :O   %d, line %d at file %s\n", error, line, file);
-        exit(1);
-    }
-}
-
-#define erchk(error) erchk_func(error, __LINE__, __FILE__)
-
-const int WIDTH = 800;
-const int HEIGHT = 800;
-const int POLYGONS = 20000;
-const int SHOW_Z_BUFFER = 0;
-
-int main(){
-    srand(time(NULL));
-
-    float polygons[POLYGONS][3][3];
-
-    cl_uint frame_buffer[WIDTH * HEIGHT];
-    float z_buffer[WIDTH * HEIGHT];
-
-    // ----- Check for Valid Platforms & GPUs
-    cl_platform_id platform;
-    cl_device_id device;
-    cl_uint number_of_platforms, number_of_devices;
-
-    clGetPlatformIDs(1, &platform, &number_of_platforms);
-
-    if(number_of_platforms == 0){
-        printf("No OpenCL Platforms");
-    }
-
-    clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, &number_of_devices);
-
-    if (number_of_devices == 0){
-        printf("No GPU's Found");
-    }
-    // -----
-
-    // ----- Setup OpenCL
-    cl_int error;
-
-    cl_context context = clCreateContext(NULL, 1, &device, NULL, NULL, NULL);
-    cl_command_queue queue = clCreateCommandQueue(context, device, 0, NULL);
-
-    cl_mem input_memory_buffer = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(float) * 3 * 3 * POLYGONS, polygons, &error);
-    erchk(error);
-
-    cl_mem output_memory_buffer = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(cl_uint) * WIDTH * HEIGHT, NULL, &error);
-    erchk(error);
-
-    printf("%ld bytes\n", sizeof(float) * 3 * 3 * POLYGONS + WIDTH * HEIGHT * sizeof(cl_uint));
-
-    cl_program kernel_program = clCreateProgramWithSource(context, 1, &kernel_source, NULL, &error);
-    erchk(error);
-
-    error = clBuildProgram(kernel_program, 1, &device, NULL, NULL, NULL);
-    erchk(error);
-
-    cl_kernel compiled_kernel = clCreateKernel(kernel_program, "raster_kernel", &error);
-    erchk(error);
-
-    erchk(clSetKernelArg(compiled_kernel, 0, sizeof(cl_mem), &input_memory_buffer));
-    erchk(clSetKernelArg(compiled_kernel, 1, sizeof(cl_mem), &output_memory_buffer));
-    erchk(clSetKernelArg(compiled_kernel, 2, sizeof(int), &POLYGONS));
-    erchk(clSetKernelArg(compiled_kernel, 3, sizeof(int), &WIDTH));
-    erchk(clSetKernelArg(compiled_kernel, 4, sizeof(int), &HEIGHT));
-    erchk(clSetKernelArg(compiled_kernel, 5, sizeof(int), &SHOW_Z_BUFFER));
-
-    size_t size_2d[2] = {WIDTH, HEIGHT};
-
-    cl_uint pattern = 0x22222222;
-    // -----
-
-    SDL_Init(SDL_INIT_VIDEO);
-    SDL_Window* window = SDL_CreateWindow("Rasterizer", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH, HEIGHT, SDL_WINDOW_OPENGL);
-    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
-    SDL_Texture* texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT);
-
-    int running = 1;
-
-    int frame = 0;
-
-    Uint64 start_time;
-    double frame_time_ms;
-    double fps;
-
-    while (running) {
-        start_time = SDL_GetPerformanceCounter();
-
-        if (frame % 1 == 0){
-            for (int p = 0; p < POLYGONS; p++){
-                for (int point = 0; point < 3; point++){
-                    for (int i = 0; i < 3; i++){
-                        polygons[p][point][i] = rand() % WIDTH + 1;
-                    }
-                }
-            }
-        }
-
-        memset(&z_buffer, 0, sizeof(float) * WIDTH * HEIGHT);
-
-        erchk(clEnqueueWriteBuffer(queue, input_memory_buffer, CL_TRUE, 0, sizeof(float) * 3 * 3 * POLYGONS, polygons, 0, NULL, NULL));
-
-        erchk(clEnqueueFillBuffer(queue, output_memory_buffer, &pattern, sizeof(cl_uint), 0, sizeof(cl_uint) * WIDTH * HEIGHT, 0, NULL, NULL));
-
-        erchk(clEnqueueNDRangeKernel(queue, compiled_kernel, 2, NULL, size_2d, NULL, 0, NULL, NULL));
-
-        erchk(clFinish(queue));
-
-        erchk(clEnqueueReadBuffer(queue, output_memory_buffer, CL_TRUE, 0, sizeof(cl_uint) * WIDTH * HEIGHT, &frame_buffer, 0, NULL, NULL));
-
-        SDL_Event event;
-        while (SDL_PollEvent(&event)){
-            switch (event.type){
-                case SDL_QUIT:
-                running = 0;
-            }
-        }
-        
-        SDL_UpdateTexture(texture, NULL, frame_buffer, WIDTH * sizeof(cl_uint));
-        
-        SDL_RenderClear(renderer);
-        SDL_RenderCopy(renderer, texture, NULL, NULL);
-        SDL_RenderPresent(renderer);
-        
-        frame++;
-
-        double delta_time = (double)(SDL_GetPerformanceCounter() - start_time) / (double)SDL_GetPerformanceFrequency();
-        double fps = 1.0 / delta_time;
-
-        printf("%lf fps\n", fps);
-        printf("%d polygons\n", POLYGONS);
-    }
-    
-    clReleaseMemObject(input_memory_buffer);
-    clReleaseMemObject(output_memory_buffer);
-    clReleaseKernel(compiled_kernel);
-    clReleaseProgram(kernel_program);
-    clReleaseCommandQueue(queue);
-    clReleaseContext(context);
-
-    SDL_DestroyTexture(texture);
-    SDL_DestroyRenderer(renderer);
-    SDL_DestroyWindow(window);
-    SDL_Quit();
-}

src/RasterIver/source code/non-lib src/main_test.c

@@ -1,253 +0,0 @@
-#include "stdlib.h"
-#include "SDL2/SDL.h"
-#include "math.h"
-#include "time.h"
-#include <CL/cl.h>
-
-const int WIDTH = 800;
-const int HEIGHT = 800;
-const int POLYGON_SIZE = sizeof(float) * 3 * 3;
-const int POLYGONS = 5;
-
-int is_intersecting(int a, int b, int c, int d, int p, int q, int r, int s) {
-    float det, gamma, lambda;
-    
-    det = (c - a) * (s - q) - (r - p) * (d - b);
-    
-    if (det == 0) {
-        return 1;
-    } 
-    else {
-        lambda = ((s - q) * (r - a) + (p - r) * (s - b)) / det;
-        gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det;
-        return (0 < lambda && lambda < 1) && (0 < gamma && gamma < 1);
-    }
-}
-
-void norm(float dest[2], float a[2]){
-    float magnitude = sqrt((pow(a[0], 2) + pow(a[1], 2)));
-    
-    dest[0] = a[0] / magnitude;
-    dest[1] = a[1] / magnitude;
-}
-
-void sub(float dest[2], float a[2], float b[2]){
-    dest[0] = a[0] - b[0];
-    dest[1] = a[1] - b[1];
-}
-
-void add(float dest[2], float a[2], float b[2]){
-    dest[0] = a[0] + b[0];
-    dest[1] = a[1] + b[1];
-}
-
-const char* kernel_source = 
-"__kernel void raster_kernel(__global float* polygons, __global uint* frame_buffer)\n"
-"int id = get_global_id(0); \n"
-" \n"
-" \n"
-"frame_buffer[id] = 80085; \n"
-" \n"
-"}\n";
-
-int main(){
-    srand(time(NULL));
-
-    float polygons[POLYGONS][3][3];
-
-    cl_uint frame_buffer[WIDTH * HEIGHT];
-    float z_buffer[WIDTH * HEIGHT];
-
-    // ----- Check for Valid Platforms & GPUs
-    cl_platform_id platform;
-    cl_device_id device;
-    cl_uint number_of_platforms, number_of_devices;
-
-    clGetPlatformIDs(1, &platform, &number_of_platforms);
-
-    if(number_of_platforms == 0){
-        printf("No OpenCL Platforms");
-    }
-
-    clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, &number_of_devices);
-
-    if (number_of_devices == 0){
-        printf("No GPU's Found");
-    }
-    // -----
-
-    // ----- Setup OpenCL
-    cl_context context = clCreateContext(NULL, 1, &device, NULL, NULL, NULL);
-    cl_command_queue queue = clCreateCommandQueue(context, device, 0, NULL);
-
-    cl_mem input_memory_buffer = clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(float) * 3 * 3 * POLYGONS, polygons, NULL);
-    cl_mem output_memory_buffer = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(cl_uint) * POLYGONS, NULL, NULL);
-
-    cl_program kernel_program = clCreateProgramWithSource(context, 1, &kernel_source, NULL, NULL);
-    clBuildProgram(kernel_program, 1, &device, NULL, NULL, NULL);
-    cl_kernel compiled_kernel = clCreateKernel(kernel_program, "raster_kernel", NULL);
-    clSetKernelArg(compiled_kernel, 0, sizeof(cl_mem), &input_memory_buffer);
-    clSetKernelArg(compiled_kernel, 1, sizeof(cl_mem), &output_memory_buffer);
-
-    size_t size = POLYGONS;
-
-    cl_uint pattern = 121212;
-    // -----
-
-    SDL_Init(SDL_INIT_VIDEO);
-    SDL_Window* window = SDL_CreateWindow("Rasterizer", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH, HEIGHT, SDL_WINDOW_OPENGL);
-    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
-    SDL_Texture* texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT);
-
-    int running = 1;
-
-    int frame = 0;
-
-    Uint32 start_time, frame_time;
-    float fps;
-
-    while (running) {
-        start_time = SDL_GetTicks();
-
-        //if (frame % 1 == 0){
-            for (int p = 0; p < POLYGONS; p++){
-                for (int point = 0; point < 3; point++){
-                    for (int i = 0; i < 3; i++){
-                        polygons[p][point][i] = rand() % WIDTH + 1;
-                    }
-                }
-            }
-        //}
-
-        memset(&z_buffer, 0, sizeof(float) * WIDTH * HEIGHT);
-
-        clEnqueueFillBuffer(queue, output_memory_buffer, &pattern, sizeof(cl_uint), 0, sizeof(cl_uint) * POLYGONS, 0, NULL, NULL);
-
-        clEnqueueNDRangeKernel(queue, compiled_kernel, 1, NULL, &size, NULL, 0, NULL, NULL);
-
-        clFinish(queue);
-
-        clEnqueueReadBuffer(queue, output_memory_buffer, CL_TRUE, 0, sizeof(cl_uint) * POLYGONS, &frame_buffer, 0, NULL, NULL);
-
-        for (int i = 0; i < POLYGONS; i++){
-            printf("%u\n", frame_buffer[i]);
-        }
-
-        SDL_Event event;
-        while (SDL_PollEvent(&event)){
-            switch (event.type){
-                case SDL_QUIT:
-                running = 0;
-            }
-        }
-        
-        // for (int polygon = 0; polygon < POLYGONS; polygon++){
-        //     float x0 = polygons[polygon][0][0];
-        //     float y0 = polygons[polygon][0][1];
-        //     float z0 = polygons[polygon][0][2];
-        //     float x1 = polygons[polygon][1][0];
-        //     float y1 = polygons[polygon][1][1];
-        //     float z1 = polygons[polygon][1][2];
-        //     float x2 = polygons[polygon][2][0];
-        //     float y2 = polygons[polygon][2][1];
-        //     float z2 = polygons[polygon][2][2];
-            
-        //     float smallest_x = x0;
-        //     float largest_x = x0;
-        //     float smallest_y = y0;
-        //     float largest_y = y0;
-            
-        //     for (int point = 0; point < 3; point++){
-        //         float x = polygons[polygon][point][0];
-        //         float y = polygons[polygon][point][1];
-                
-        //         if (x > largest_x){
-        //             largest_x = x;
-        //         }
-                
-        //         if (x < smallest_x){
-        //             smallest_x = x;
-        //         }
-                
-        //         if (y > largest_y){
-        //             largest_y = y;
-        //         }
-                
-        //         if (y < smallest_y){
-        //             smallest_y = y;
-        //         }
-        //     }
-            
-        //     smallest_x = fmin(smallest_x, 0);
-        //     largest_x = fmax(largest_x, WIDTH);
-        //     smallest_y = fmin(smallest_y, 0);
-        //     largest_y = fmax(largest_y, HEIGHT);
-
-        //     // test every pixel in a rect around the triangle. If it's inside, color it.
-        //     for (int x = (int)smallest_x; x < largest_x; x++){
-        //         for (int y = (int)smallest_y; y < largest_y; y++){
-        //             int intersections = 0;
-                    
-        //             for (int i = 0; i < 3; i++){
-        //                 intersections += is_intersecting(x, y, 10000, 100000, polygons[polygon][i][0], polygons[polygon][i][1], polygons[polygon][(i + 1) % 3][0], polygons[polygon][(i + 1) % 3][1]);
-        //             }
-
-        //             if (intersections % 2 == 0){
-        //                 continue;
-        //             }
-
-        //             float denominator = (y1 - y2) * (x0 - x2) + (x2 - x1) * (y0 - y2);
-        //             float w0 = ((y1 - y2) * (x - x2) + (x2 - x1) * (y - y2)) / denominator;
-        //             float w1 = ((y2 - y0) * (x - x0) + (x0 - x2) * (y - y2)) / denominator;
-        //             float w2 = 1.0 - w0 - w1;
-
-        //             if (denominator < 0) {
-        //                 w0 = -w0;
-        //                 w1 = -w1;
-        //                 w2 = -w2;
-        //                 denominator = -denominator;
-        //             }                    
-
-        //             float z = w0 * z0 + w1 * z1 + w2 * z2;
-
-        //             if (z < z_buffer[y * WIDTH + x]){
-        //                 z_buffer[y * WIDTH + x] = z;
-        //             }
-        //             else {
-        //                 continue;
-        //             }
-
-        //             if (z < 0){
-        //                 z *= -1;
-        //             }
-
-        //            frame_buffer[y * WIDTH + x] = 0xFFFFFFFF / POLYGONS * (polygon + 1);
-        //         }
-        //     }
-        // }
-        SDL_UpdateTexture(texture, NULL, frame_buffer, WIDTH * sizeof(cl_uint));
-        
-        SDL_RenderClear(renderer);
-        SDL_RenderCopy(renderer, texture, NULL, NULL);
-        SDL_RenderPresent(renderer);
-        
-        frame++;
-
-        frame_time = SDL_GetTicks()-start_time;
-        fps = (frame_time > 0) ? 1000.0f / frame_time : 0.0f;
-        // printf("%f fps\n", fps);
-        // printf("%d polygons\n", POLYGONS);
-    }
-    
-    clReleaseMemObject(input_memory_buffer);
-    clReleaseMemObject(output_memory_buffer);
-    clReleaseKernel(compiled_kernel);
-    clReleaseProgram(kernel_program);
-    clReleaseCommandQueue(queue);
-    clReleaseContext(context);
-
-    SDL_DestroyTexture(texture);
-    SDL_DestroyRenderer(renderer);
-    SDL_DestroyWindow(window);
-    SDL_Quit();
-}

src/headers/functions.h

@@ -0,0 +1,35 @@
+#ifndef FUNCTIONS_H
+#define FUNCTIONS_H
+
+#include "types.h"
+
+// returns the RI_context
+RI_context *RI_get_context();
+
+// initilizes RasterIver
+// returns completion code (0: fine, 1: error)
+int RI_init();
+
+// ticks RasterIver (updated window, check for events, renders scene, etc)
+void RI_tick();
+
+// renders a scene onto a texture
+// set the texture to NULL to render to the window's framebuffer
+void RI_render(RI_texture* texture, RI_scene *scene);
+
+// loads an OBJ file into memory as a mesh
+RI_mesh *RI_load_mesh(char* filename, RI_actor *actor);
+
+// allocates and returns a pointer to a new scene
+RI_scene *RI_new_scene();
+
+// allocates and returns a pointer to a new actor
+RI_actor *RI_new_actor();
+
+// allocates and returns a pointer to a new material
+RI_material *RI_new_material();
+
+// allocates and returns a pointer to a new texture
+RI_texture *RI_new_texture(int width, int height);
+
+#endif

src/headers/math.h

@@ -0,0 +1,169 @@
+#ifndef MATH_H
+#define MATH_H
+
+#include "stdint.h"
+#include <math.h>
+#include <CL/cl.h>
+
+typedef struct {
+    cl_double w;
+    cl_double x;
+    cl_double y;
+    cl_double z;
+} RI_vector_4;
+
+typedef struct {
+    cl_double x;
+    cl_double y;
+    cl_double z;
+} RI_vector_3;
+    
+typedef struct {
+    cl_double x;
+    cl_double y;
+} RI_vector_2;
+
+typedef struct {
+    cl_int x;
+    cl_int y;
+} RI_vector_2i;
+
+// value-wise multiplacation.
+// multiply the whole vector by 1 value
+void vector_2_times(RI_vector_2 *vector, double value){
+    vector->x *= value;
+    vector->y *= value;
+}
+
+// value-wise multiplacation.
+// multiply the whole vector by 1 value
+void vector_3_times(RI_vector_3 *vector, double value){
+    vector->x *= value;
+    vector->y *= value;
+    vector->z *= value;
+}
+
+// "hadamard" addition.
+// add each value of one vector with the matching one on the other vector
+void vector_2_element_wise_add(RI_vector_2 *addend_a, RI_vector_2 addend_b){
+    addend_a->x += addend_b.x;
+    addend_a->y += addend_b.y;
+}
+
+// hadamard multiplacation.
+// multiply each value of one vector with the matching one on the other vector
+void vector_3_hadamard(RI_vector_3 *multiplicand, RI_vector_3 multiplicator){
+    multiplicand->x *= multiplicator.x;
+    multiplicand->y *= multiplicator.y;
+    multiplicand->z *= multiplicator.z;
+}
+
+// "hadamard" addition.
+// add each value of one vector with the matching one on the other vector
+void vector_3_element_wise_add(RI_vector_3 *addend_a, RI_vector_3 addend_b){
+    addend_a->x += addend_b.x;
+    addend_a->y += addend_b.y;
+    addend_a->z += addend_b.z;
+}
+
+// "hadamard" subtraction.
+// subtraction each value of one vector with the matching one on the other vector
+void vector_3_element_wise_subtract(RI_vector_3 *minuend, RI_vector_3 subtrahend){
+    minuend->x -= subtrahend.x;
+    minuend->y -= subtrahend.y;
+    minuend->z -= subtrahend.z;
+}
+
+// conjugate a quaterion.
+// (flip the sign of the x, y, z values)
+void quaternion_conjugate(RI_vector_4* quaternion){
+    quaternion->x *= -1.0;
+    quaternion->y *= -1.0;
+    quaternion->z *= -1.0;
+}
+
+// quaternion multiplacation
+void quaternion_multiply(RI_vector_4* a, RI_vector_4 b){
+    double w1 = a->w; double x1 = a->x; double y1 = a->y; double z1 = a->z;
+    double w2 = b.w; double x2 = b.x; double y2 = b.y; double z2 = b.z;
+
+    double w = w1*w2 - x1*x2 - y1*y2 - z1*z2;
+    double x = w1*x2 + x1*w2 + y1*z2 - z1*y2;
+    double y = w1*y2 - x1*z2 + y1*w2 + z1*x2;
+    double z = w1*z2 + x1*y2 - y1*x2 + z1*w2;
+
+    *a = (RI_vector_4){w, x, y, z};
+}
+
+// linear interpolate between 2 vectors
+void vector_2_lerp(RI_vector_2 vector_a, RI_vector_2 vector_b, RI_vector_2 *result, double w1){
+    double w0 = 1.0 - w1;
+
+    vector_2_times(result, 0);
+
+    vector_2_times(&vector_a, w0);
+    vector_2_times(&vector_b, w1);
+
+    vector_2_element_wise_add(result, vector_a);
+    vector_2_element_wise_add(result, vector_b);
+}
+
+// beziate between 2 vectors.
+// A & C: end points of the line
+// B: point that determines the curve; off the line
+void vector_2_bezier_interpolate(RI_vector_2 vector_a, RI_vector_2 vector_b, RI_vector_2 vector_c, RI_vector_2 *result, double w1){
+    double w0 = 1.0 - w1;
+
+    vector_2_lerp(vector_a, vector_b, &vector_b, w1); // this works because the first vector b is a copy and the second is a reference
+    vector_2_lerp(vector_b, vector_c, &vector_c, w1);
+
+    vector_2_lerp(vector_b, vector_c, result, w1);
+}
+
+// linear interpolate between 2 vectors
+void vector_3_lerp(RI_vector_3 vector_a, RI_vector_3 vector_b, RI_vector_3 *result, double w1){
+    double w0 = 1.0 - w1;
+
+    vector_3_times(result, 0);
+
+    vector_3_times(&vector_a, w0);
+    vector_3_times(&vector_b, w1);
+
+    vector_3_element_wise_add(result, vector_a);
+    vector_3_element_wise_add(result, vector_b);
+}
+
+// returns the distance between 2 points
+int distance_2(RI_vector_2 a, RI_vector_2 b){
+    return (int)sqrtf((double)((double)(a.x - b.x) * (double)(a.x - b.x)) + (double)((double)(a.y - b.y) * (double)(a.y - b.y)));
+}
+
+void quaternion_rotate(RI_vector_3 *position, RI_vector_4 rotation){
+    RI_vector_4 pos_quat = {0, position->x, position->y, position->z};
+
+    RI_vector_4 rotation_conjugation = rotation;
+    quaternion_conjugate(&rotation_conjugation);
+
+    quaternion_multiply(&rotation, pos_quat);
+
+    quaternion_multiply(&rotation, rotation_conjugation);
+
+
+    *position = (RI_vector_3){rotation.x, rotation.y, rotation.z};
+}
+
+void RI_euler_rotation_to_quaternion(RI_vector_4 *quaternion, RI_vector_3 euler_rotation){
+    double cx = cosf(euler_rotation.x * 0.5f);
+    double sx = sinf(euler_rotation.x * 0.5f);
+    double cy = cosf(euler_rotation.y * 0.5f);
+    double sy = sinf(euler_rotation.y * 0.5f);
+    double cz = cosf(euler_rotation.z * 0.5f);
+    double sz = sinf(euler_rotation.z * 0.5f);
+
+    quaternion->w = cx * cy * cz + sx * sy * sz;
+    quaternion->x = sx * cy * cz - cx * sy * sz;
+    quaternion->y = cx * sy * cz + sx * cy * sz;
+    quaternion->z = cx * cy * sz - sx * sy * cz;
+}
+
+#endif

src/headers/memory.h

@@ -0,0 +1,127 @@
+#include "types.h"
+
+RI_context context;
+
+#define RI_realloc(__ptr, __size) written_RI_realloc(__ptr, __size, __func__, __LINE__, context)
+#define RI_malloc(__size) written_RI_malloc(__size, __func__, __LINE__, context)
+#define RI_calloc(__nmemb, __size) written_RI_calloc(__nmemb, __size, __func__, __LINE__, context)
+#define RI_free(__ptr) written_RI_free(__ptr, __func__, __LINE__, context)
+
+void* written_RI_realloc(void *__ptr, size_t __size, const char *caller, int line, RI_context context){
+    void *pointer = realloc(__ptr, __size);
+
+    if (context.memory.debug_memory) {
+        int current_allocation_index = 0;
+        int checking = 1;
+
+        while (checking){
+            if (!context.memory.allocation_table[current_allocation_index].reallocated_free && context.memory.allocation_table[current_allocation_index].pointer == __ptr){
+                context.memory.allocation_table[current_allocation_index].reallocated_free = 1;
+                
+                checking = 0;
+            }
+
+            current_allocation_index++;
+            
+            if (current_allocation_index >= context.memory.allocation_search_limit){
+                checking = 0;
+            }
+        }
+
+        if (context.memory.current_allocation_index >= context.memory.allocation_table_length){
+            context.memory.allocation_table_length += 50;
+            context.memory.allocation_search_limit += 50;
+            
+            context.memory.allocation_table = RI_realloc(context.memory.allocation_table, sizeof(RI_memory_allocation) * context.memory.allocation_table_length);
+        }
+
+        context.memory.allocation_table[context.memory.current_allocation_index].allocated = 1;
+        context.memory.allocation_table[context.memory.current_allocation_index].reallocated_alloc = 1;
+        context.memory.allocation_table[context.memory.current_allocation_index].reallocated_free = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].freed = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].line = line;
+        context.memory.allocation_table[context.memory.current_allocation_index].pointer = pointer;        
+        context.memory.allocation_table[context.memory.current_allocation_index].size = __size;
+
+        context.memory.current_allocation_index++;
+    }
+
+    return pointer;
+}
+
+void* written_RI_malloc(size_t __size, const char *caller, int line, RI_context context){
+    void *pointer = malloc(__size);
+    
+    if (context.memory.debug_memory) {
+        if (context.memory.current_allocation_index >= context.memory.allocation_table_length){
+            context.memory.allocation_table_length += 50;
+            context.memory.allocation_search_limit += 50;
+            
+            context.memory.allocation_table = RI_realloc(context.memory.allocation_table, sizeof(RI_memory_allocation) * context.memory.allocation_table_length);
+        }
+
+        context.memory.allocation_table[context.memory.current_allocation_index].allocated = 1;
+        context.memory.allocation_table[context.memory.current_allocation_index].reallocated_free = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].reallocated_alloc = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].freed = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].line = line;
+        context.memory.allocation_table[context.memory.current_allocation_index].pointer = pointer;        
+        context.memory.allocation_table[context.memory.current_allocation_index].size = __size;
+
+        context.memory.current_allocation_index++;
+    }
+
+    return pointer;
+}
+
+void* written_RI_calloc(size_t __nmemb, size_t __size, const char *caller, int line, RI_context context){
+    void *pointer = calloc(__nmemb, __size);
+    
+    if (context.memory.debug_memory) {
+        if (context.memory.current_allocation_index >= context.memory.allocation_table_length){
+            context.memory.allocation_table_length += 50;
+            context.memory.allocation_search_limit += 50;
+            
+            context.memory.allocation_table = RI_realloc(context.memory.allocation_table, sizeof(RI_memory_allocation) * context.memory.allocation_table_length);
+        }
+
+        context.memory.allocation_table[context.memory.current_allocation_index].allocated = 1;
+        context.memory.allocation_table[context.memory.current_allocation_index].reallocated_free = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].reallocated_alloc = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].freed = 0;
+        context.memory.allocation_table[context.memory.current_allocation_index].line = line;
+        context.memory.allocation_table[context.memory.current_allocation_index].pointer = pointer;        
+        context.memory.allocation_table[context.memory.current_allocation_index].size = __size * __nmemb;
+            
+        context.memory.current_allocation_index++;
+    }
+
+    return pointer;
+}
+
+void written_RI_free(void *__ptr, const char *caller, int line){
+    if (context.memory.debug_memory) {
+        // size_t size = 0;
+        
+        int current_allocation_index = 0;
+        int checking = 1;
+        
+        while (checking){
+            if (!context.memory.allocation_table[current_allocation_index].reallocated_free && context.memory.allocation_table[current_allocation_index].pointer == __ptr){
+                // i dont know what this does?
+                // size = context.memory.allocation_table[current_allocation_index].size;
+                context.memory.allocation_table[current_allocation_index].freed = 1;
+                
+                checking = 0;
+            }
+            
+            current_allocation_index++;
+            
+            if (current_allocation_index >= context.memory.allocation_search_limit){
+                checking = 0;
+            }
+        }
+    }
+ 
+    free(__ptr);
+}

src/headers/rasteriver.h

@@ -0,0 +1,8 @@
+#ifndef RASTERIVER_H
+#define RASTERIVER_H
+
+#include "types.h"
+#include "functions.h"
+#include "math.h"
+
+#endif

src/headers/types.h

@@ -0,0 +1,160 @@
+#ifndef STRUCTS_H
+#define STRUCTS_H
+
+#include <SDL2/SDL.h>
+#include <CL/cl.h>
+#include "math.h"
+
+typedef enum {
+    ri_true = 1,
+    ri_false = 0,
+} ri_bool;
+
+typedef struct { // A loaded texture file
+    uint32_t *image_buffer;
+    RI_vector_2i resolution;
+} RI_texture;
+
+typedef struct {
+    cl_uint position_0_index;
+    cl_uint position_1_index;
+    cl_uint position_2_index;
+
+    cl_uint normal_0_index;
+    cl_uint normal_1_index;
+    cl_uint normal_2_index;
+
+    cl_uint uv_0_index;
+    cl_uint uv_1_index;
+    cl_uint uv_2_index;
+
+    cl_uint should_render;
+} RI_face;
+
+typedef struct {
+    RI_face *faces;
+    RI_vector_3 *vertex_positions;
+    RI_vector_3 *normals;
+    RI_vector_2 *uvs;
+    cl_uint face_count, vertex_count, normal_count, uv_count;
+    cl_uint has_normals, has_uvs;
+} RI_mesh;
+
+typedef struct {
+    double r, g, b;
+} RI_color;
+
+typedef struct {
+    uint32_t albedo;
+} RI_material;
+
+typedef struct {
+    RI_vector_3 position;
+    RI_vector_4 rotation;
+    RI_vector_3 scale;
+    ri_bool active;
+    ri_bool has_normals;
+    ri_bool has_uvs;
+    int material_index;
+    int face_index;
+    int face_count;
+} RI_actor;
+
+typedef struct {
+    RI_vector_3 position_0, position_1, position_2;
+    RI_vector_3 normal_0, normal_1, normal_2;
+    RI_vector_2 uv_0, uv_1, uv_2;
+    int min_screen_x, max_screen_x, min_screen_y, max_screen_y;
+    int should_render;
+    int shrunk;
+    int split;
+} RI_renderable_face;
+
+typedef struct {
+    RI_vector_3 position;
+    RI_vector_4 rotation;
+    float FOV, min_clip, max_clip;
+} RI_camera;
+
+typedef struct {
+    RI_actor **actors;
+    RI_camera camera;
+    int length_of_actors_array, face_count;
+} RI_scene;
+
+typedef struct {
+    size_t size;
+    void *pointer;
+    int reallocated_free;
+    int reallocated_alloc;
+    int freed;
+    int allocated;
+    int line;
+} RI_memory_allocation;
+
+typedef struct {
+    int width, height, half_width, half_height;
+    char* title;
+} RI_window;
+
+typedef struct {
+    SDL_Window *window;
+    SDL_Renderer *renderer;
+    SDL_Texture *frame_buffer_texture;
+    uint32_t *frame_buffer_intermediate;
+    RI_texture *frame_buffer;
+    int pitch;
+} RI_SDL;
+
+typedef struct {
+    cl_platform_id platform;
+    cl_device_id device;
+    cl_context context;
+    cl_command_queue queue;
+    cl_kernel rasterization_kernel;
+    cl_kernel transformation_kernel;
+    cl_mem renderable_faces_mem_buffer;
+    cl_mem faces_mem_buffer;
+    cl_mem frame_buffer_mem_buffer;
+    cl_mem vertecies_mem_buffer;
+    cl_mem normals_mem_buffer;
+    cl_mem uvs_mem_buffer;
+    RI_renderable_face *faces_to_render;
+    RI_face *faces;
+    RI_vector_3 *vertecies;
+    RI_vector_3 *normals;
+    RI_vector_2 *uvs;
+    int face_count;
+    int vertex_count;
+    int normal_count;
+    int uv_count;
+    int length_of_renderable_faces_array;
+} RI_CL;
+
+typedef struct {
+    ri_bool debug_memory;
+    RI_memory_allocation *allocation_table;
+    int current_allocation_index;
+    int allocation_search_limit;
+    int allocation_table_length;
+} RI_memory;
+
+typedef struct {
+    RI_actor *default_actor;
+} RI_defaults;
+
+typedef struct {
+    RI_window window;
+    RI_SDL sdl;
+    RI_CL opencl;
+    RI_memory memory;
+    RI_defaults defaults;
+    ri_bool is_running;
+    char* debug_prefix;
+    ri_bool should_debug;   
+    int current_renderable_face_index;
+    int current_split_renderable_face_index;
+    int current_frame;
+} RI_context;
+
+#endif

src/kernels/kernels.cl

@@ -0,0 +1,644 @@
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+typedef struct {
+    double w;
+    double x;
+    double y;
+    double z;
+} RI_vector_4;
+    
+typedef struct {
+    double x;
+    double y;
+    double z;
+} RI_vector_3;
+
+typedef struct {
+    double x;
+    double y;
+} RI_vector_2;
+
+typedef struct {
+    RI_vector_3 position_0, position_1, position_2;
+    RI_vector_3 normal_0, normal_1, normal_2;
+    RI_vector_2 uv_0, uv_1, uv_2;
+    int min_screen_x, max_screen_x, min_screen_y, max_screen_y;
+    int should_render;
+    int shrunk;
+    int split;
+} RI_renderable_face;
+
+typedef struct {
+    int position_0_index;
+    int position_1_index;
+    int position_2_index;
+
+    int normal_0_index;
+    int normal_1_index;
+    int normal_2_index;
+
+    int uv_0_index;
+    int uv_1_index;
+    int uv_2_index;
+
+    int should_render;
+} RI_face;
+
+typedef struct {
+    RI_vector_3 position;
+    RI_vector_4 rotation;
+    RI_vector_3 scale;;
+    int active;
+    int has_normals;
+    int has_uvs;
+    int material_index;
+    int face_index;
+    int face_count;
+} RI_actor;
+
+typedef struct {
+    RI_vector_3 position;
+    RI_vector_4 rotation;
+    float FOV, min_clip, max_clip;
+} RI_camera;
+
+// value-wise multiplacation.
+// multiply the whole vector by 1 value
+void vector_2_times(RI_vector_2 *vector, double value){
+    vector->x *= value;
+    vector->y *= value;
+}
+
+void global_vector_2_times(__global RI_vector_2 *vector, double value){
+    vector->x *= value;
+    vector->y *= value;
+}
+
+// value-wise multiplacation.
+// multiply the whole vector by 1 value
+void vector_3_times(RI_vector_3 *vector, double value){
+    vector->x *= value;
+    vector->y *= value;
+    vector->z *= value;
+}
+
+void global_vector_3_times(__global RI_vector_3 *vector, double value){
+    vector->x *= value;
+    vector->y *= value;
+    vector->z *= value;
+}
+
+// hadamard multiplacation.
+// multiply each value of one vector with the matching one on the other vector
+void vector_3_hadamard(RI_vector_3 *multiplicand, RI_vector_3 multiplicator){
+    multiplicand->x *= multiplicator.x;
+    multiplicand->y *= multiplicator.y;
+    multiplicand->z *= multiplicator.z;
+}
+
+void global_vector_3_hadamard(__global RI_vector_3 *multiplicand, RI_vector_3 multiplicator){
+    multiplicand->x *= multiplicator.x;
+    multiplicand->y *= multiplicator.y;
+    multiplicand->z *= multiplicator.z;
+}
+
+// "hadamard" addition.
+// add each value of one vector with the matching one on the other vector
+void vector_2_element_wise_add(RI_vector_2 *addend_a, RI_vector_2 addend_b){
+    addend_a->x += addend_b.x;
+    addend_a->y += addend_b.y;
+}
+
+void global_vector_2_element_wise_add(__global RI_vector_2 *addend_a, RI_vector_2 addend_b){
+    addend_a->x += addend_b.x;
+    addend_a->y += addend_b.y;
+}
+
+// "hadamard" addition.
+// add each value of one vector with the matching one on the other vector
+void vector_3_element_wise_add(RI_vector_3 *addend_a, RI_vector_3 addend_b){
+    addend_a->x += addend_b.x;
+    addend_a->y += addend_b.y;
+    addend_a->z += addend_b.z;
+}
+
+void global_vector_3_element_wise_add(__global RI_vector_3 *addend_a, RI_vector_3 addend_b){
+    addend_a->x += addend_b.x;
+    addend_a->y += addend_b.y;
+    addend_a->z += addend_b.z;
+}
+
+// "hadamard" subtraction.
+// subtraction each value of one vector with the matching one on the other vector
+void vector_3_element_wise_subtract(RI_vector_3 *minuend, RI_vector_3 subtrahend){
+    minuend->x -= subtrahend.x;
+    minuend->y -= subtrahend.y;
+    minuend->z -= subtrahend.z;
+}
+
+void global_vector_3_element_wise_subtract(__global RI_vector_3 *minuend, RI_vector_3 subtrahend){
+    minuend->x -= subtrahend.x;
+    minuend->y -= subtrahend.y;
+    minuend->z -= subtrahend.z;
+}
+
+// conjugate a quaterion.
+// (flip the sign of the x, y, z values)
+void quaternion_conjugate(RI_vector_4* quaternion){
+    quaternion->x *= -1.0;
+    quaternion->y *= -1.0;
+    quaternion->z *= -1.0;
+}
+
+void globla_quaternion_conjugate(__global RI_vector_4* quaternion){
+    quaternion->x *= -1.0;
+    quaternion->y *= -1.0;
+    quaternion->z *= -1.0;
+}
+
+// quaternion multiplacation
+void quaternion_multiply(RI_vector_4* a, RI_vector_4 b){
+    double w1 = a->w; double x1 = a->x; double y1 = a->y; double z1 = a->z;
+    double w2 = b.w; double x2 = b.x; double y2 = b.y; double z2 = b.z;
+
+    double w = w1*w2 - x1*x2 - y1*y2 - z1*z2;
+    double x = w1*x2 + x1*w2 + y1*z2 - z1*y2;
+    double y = w1*y2 - x1*z2 + y1*w2 + z1*x2;
+    double z = w1*z2 + x1*y2 - y1*x2 + z1*w2;
+
+    *a = (RI_vector_4){w, x, y, z};
+}
+
+void global_quaternion_multiply(__global RI_vector_4* a, RI_vector_4 b){
+    double w1 = a->w; double x1 = a->x; double y1 = a->y; double z1 = a->z;
+    double w2 = b.w; double x2 = b.x; double y2 = b.y; double z2 = b.z;
+
+    double w = w1*w2 - x1*x2 - y1*y2 - z1*z2;
+    double x = w1*x2 + x1*w2 + y1*z2 - z1*y2;
+    double y = w1*y2 - x1*z2 + y1*w2 + z1*x2;
+    double z = w1*z2 + x1*y2 - y1*x2 + z1*w2;
+
+    *a = (RI_vector_4){w, x, y, z};
+}
+
+// linear interpolate between 2 vectors
+void vector_2_lerp(RI_vector_2 vector_a, RI_vector_2 vector_b, RI_vector_2 *result, double w1){
+    double w0 = 1.0 - w1;
+
+    vector_2_times(result, 0);
+
+    vector_2_times(&vector_a, w0);
+    vector_2_times(&vector_b, w1);
+
+    vector_2_element_wise_add(result, vector_a);
+    vector_2_element_wise_add(result, vector_b);
+}
+
+void global_vector_2_lerp(RI_vector_2 vector_a, RI_vector_2 vector_b, __global RI_vector_2 *result, double w1){
+    double w0 = 1.0 - w1;
+
+    global_vector_2_times(result, 0);
+
+    vector_2_times(&vector_a, w0);
+    vector_2_times(&vector_b, w1);
+
+    global_vector_2_element_wise_add(result, vector_a);
+    global_vector_2_element_wise_add(result, vector_b);
+}
+
+// linear interpolate between 2 vectors
+void vector_3_lerp(RI_vector_3 vector_a, RI_vector_3 vector_b, RI_vector_3 *result, double w1){
+    double w0 = 1.0 - w1;
+
+    vector_3_times(result, 0);
+
+    vector_3_times(&vector_a, w0);
+    vector_3_times(&vector_b, w1);
+
+    vector_3_element_wise_add(result, vector_a);
+    vector_3_element_wise_add(result, vector_b);
+}
+
+void global_vector_3_lerp(RI_vector_3 vector_a, RI_vector_3 vector_b, __global RI_vector_3 *result, double w1){
+    double w0 = 1.0 - w1;
+
+    global_vector_3_times(result, 0);
+
+    vector_3_times(&vector_a, w0);
+    vector_3_times(&vector_b, w1);
+
+    global_vector_3_element_wise_add(result, vector_a);
+    global_vector_3_element_wise_add(result, vector_b);
+}
+
+void quaternion_rotate(RI_vector_3 *position, RI_vector_4 rotation){
+    RI_vector_4 pos_quat = {0, position->x, position->y, position->z};
+
+    RI_vector_4 rotation_conjugation = rotation;
+    quaternion_conjugate(&rotation_conjugation);
+
+    quaternion_multiply(&rotation, pos_quat);
+
+    quaternion_multiply(&rotation, rotation_conjugation);
+
+
+    *position = (RI_vector_3){rotation.x, rotation.y, rotation.z};
+}
+
+void global_quaternion_rotate(__global RI_vector_3 *position, RI_vector_4 rotation){
+    RI_vector_4 pos_quat = {0, position->x, position->y, position->z};
+
+    RI_vector_4 rotation_conjugation = rotation;
+    quaternion_conjugate(&rotation_conjugation);
+
+    quaternion_multiply(&rotation, pos_quat);
+
+    quaternion_multiply(&rotation, rotation_conjugation);
+
+    *position = (RI_vector_3){rotation.x, rotation.y, rotation.z};
+}
+
+
+__kernel void transformer(__global RI_face *faces, __global RI_vector_3 *vertecies, __global RI_vector_3 *normals, __global RI_vector_2 *uvs, __global RI_renderable_face *renderable_faces, RI_actor current_actor, RI_camera camera, int current_actor_index, int num_faces, int width, int height, double horizontal_fov_factor, double vertical_fov_factor){
+    int face_index = get_global_id(0);
+    
+    __global RI_face *cur_face = &faces[face_index + current_actor.face_index];
+
+    __global RI_renderable_face *cur_r_face = &renderable_faces[face_index];
+    
+    renderable_faces[num_faces + face_index].should_render = 0;
+
+    if (!cur_face->should_render){
+        cur_r_face->should_render = 0;
+
+        return;
+    }
+
+    int vert_pos_0_index = cur_face->position_0_index;
+    int vert_pos_1_index = cur_face->position_1_index;
+    int vert_pos_2_index = cur_face->position_2_index;
+    
+    int normal_0_index = cur_face->normal_0_index;
+    int normal_1_index = cur_face->normal_1_index;
+    int normal_2_index = cur_face->normal_2_index;
+
+    int uv_0_index = cur_face->uv_0_index;
+    int uv_1_index = cur_face->uv_1_index;
+    int uv_2_index = cur_face->uv_2_index;
+
+    // cur_r_face->parent_actor = current_actor;
+    cur_r_face->shrunk = 0;
+    cur_r_face->split = 0;
+
+    // cur_r_face->material = current_actor.material;
+
+    cur_r_face->position_0 = vertecies[vert_pos_0_index];
+    cur_r_face->position_1 = vertecies[vert_pos_1_index];
+    cur_r_face->position_2 = vertecies[vert_pos_2_index];
+
+    cur_r_face->normal_0 = normals[normal_0_index];
+    cur_r_face->normal_1 = normals[normal_1_index];
+    cur_r_face->normal_2 = normals[normal_2_index];
+
+    if (current_actor.has_uvs){
+        cur_r_face->uv_0 = uvs[uv_0_index];
+        cur_r_face->uv_1 = uvs[uv_1_index];
+        cur_r_face->uv_2 = uvs[uv_2_index];
+    }
+
+    // scale
+    global_vector_3_hadamard(&cur_r_face->position_0, current_actor.scale);
+    global_vector_3_hadamard(&cur_r_face->position_1, current_actor.scale);
+    global_vector_3_hadamard(&cur_r_face->position_2, current_actor.scale);
+
+    // actor rotation
+    global_quaternion_rotate(&cur_r_face->position_0, current_actor.rotation);
+    global_quaternion_rotate(&cur_r_face->position_1, current_actor.rotation);
+    global_quaternion_rotate(&cur_r_face->position_2, current_actor.rotation);
+
+    global_quaternion_rotate(&cur_r_face->normal_0, current_actor.rotation);
+    global_quaternion_rotate(&cur_r_face->normal_1, current_actor.rotation);
+    global_quaternion_rotate(&cur_r_face->normal_2, current_actor.rotation);
+    
+    // object position
+    global_vector_3_element_wise_add(&cur_r_face->position_0, current_actor.position);
+    global_vector_3_element_wise_add(&cur_r_face->position_1, current_actor.position);
+    global_vector_3_element_wise_add(&cur_r_face->position_2, current_actor.position);    
+
+    // camera position & rotation
+    global_vector_3_element_wise_subtract(&cur_r_face->position_0, camera.position);
+    global_vector_3_element_wise_subtract(&cur_r_face->position_1, camera.position);
+    global_vector_3_element_wise_subtract(&cur_r_face->position_2, camera.position);
+
+    global_quaternion_rotate(&cur_r_face->position_0, camera.rotation);
+    global_quaternion_rotate(&cur_r_face->position_1, camera.rotation);
+    global_quaternion_rotate(&cur_r_face->position_2, camera.rotation);        
+
+    __global RI_vector_3 *pos_0 = &cur_r_face->position_0;
+    __global RI_vector_3 *pos_1 = &cur_r_face->position_1;
+    __global RI_vector_3 *pos_2 = &cur_r_face->position_2;
+
+    int is_0_clipped = pos_0->z < camera.min_clip;
+    int is_1_clipped = pos_1->z < camera.min_clip;
+    int is_2_clipped = pos_2->z < camera.min_clip;
+
+    int clip_count = is_0_clipped + is_1_clipped + is_2_clipped;
+
+    cur_r_face->should_render = 1;
+
+    switch(clip_count){
+        case 3: {// ignore polygon, it's behind the camera
+            return;
+            break;
+        }
+
+        case 2:{ // shrink poylgon
+            __global RI_vector_3 *unclipped_point, *point_a, *point_b;
+            __global RI_vector_3 *unclipped_normal, *normal_a, *normal_b;
+            __global RI_vector_2 *unclipped_uv, *uv_a, *uv_b;
+
+            if (!is_0_clipped){ 
+                unclipped_point = &cur_r_face->position_0;
+                point_a = &cur_r_face->position_1;
+                point_b = &cur_r_face->position_2;
+                
+                unclipped_normal = &cur_r_face->normal_0;
+                normal_a = &cur_r_face->normal_1;
+                normal_b = &cur_r_face->normal_2;
+            
+                unclipped_uv = &cur_r_face->uv_0;
+                uv_a = &cur_r_face->uv_1;
+                uv_b = &cur_r_face->uv_2;
+            }
+            else if (!is_1_clipped){ 
+                unclipped_point = &cur_r_face->position_1;
+                point_a = &cur_r_face->position_2;
+                point_b = &cur_r_face->position_0;
+                
+                unclipped_normal = &cur_r_face->normal_1;
+                normal_a = &cur_r_face->normal_2;
+                normal_b = &cur_r_face->normal_0;
+            
+                unclipped_uv = &cur_r_face->uv_1;
+                uv_a = &cur_r_face->uv_2;
+                uv_b = &cur_r_face->uv_0;
+            }
+            else if (!is_2_clipped){ 
+                unclipped_point = &cur_r_face->position_2;
+                point_a = &cur_r_face->position_0;
+                point_b = &cur_r_face->position_1;
+                
+                unclipped_normal = &cur_r_face->normal_2;
+                normal_a = &cur_r_face->normal_0;
+                normal_b = &cur_r_face->normal_1;
+            
+                unclipped_uv = &cur_r_face->uv_2;
+                uv_a = &cur_r_face->uv_0;
+                uv_b = &cur_r_face->uv_1;
+            }
+        
+            double fraction_a_to_unclip = (camera.min_clip - unclipped_point->z) / (point_a->z - unclipped_point->z);                          
+            double fraction_b_to_unclip = (camera.min_clip - unclipped_point->z) / (point_b->z - unclipped_point->z);  
+
+            global_vector_3_lerp(*unclipped_point, *point_a, point_a, fraction_a_to_unclip);
+            global_vector_3_lerp(*unclipped_point, *point_b, point_b, fraction_b_to_unclip);
+
+            global_vector_3_lerp(*unclipped_normal, *normal_a, normal_a, fraction_a_to_unclip);
+            global_vector_3_lerp(*unclipped_normal, *normal_b, normal_b, fraction_b_to_unclip);
+
+            global_vector_2_lerp(*unclipped_uv, *uv_a, uv_a, fraction_a_to_unclip);
+            global_vector_2_lerp(*unclipped_uv, *uv_b, uv_b, fraction_b_to_unclip);
+
+            cur_r_face->shrunk = 1;     
+
+            break;}
+
+        case 1: {// split polygon
+            RI_vector_3 clipped_point, point_a, point_b;
+            RI_vector_3 clipped_normal, normal_a, normal_b;
+            RI_vector_2 clipped_uv, uv_a, uv_b;
+
+            cur_r_face->split = 1;
+
+            if (is_0_clipped){ 
+                clipped_point = cur_r_face->position_0;
+                point_a = cur_r_face->position_1;
+                point_b = cur_r_face->position_2;
+                
+                clipped_normal = cur_r_face->normal_0;
+                normal_a = cur_r_face->normal_1;
+                normal_b = cur_r_face->normal_2;
+            
+                clipped_uv = cur_r_face->uv_0;
+                uv_a = cur_r_face->uv_1;
+                uv_b = cur_r_face->uv_2;
+            }
+            else if (is_1_clipped){ 
+                clipped_point = cur_r_face->position_1;
+                point_a = cur_r_face->position_2;
+                point_b = cur_r_face->position_0;
+                
+                clipped_normal = cur_r_face->normal_1;
+                normal_a = cur_r_face->normal_2;
+                normal_b = cur_r_face->normal_0;
+            
+                clipped_uv = cur_r_face->uv_1;
+                uv_a = cur_r_face->uv_2;
+                uv_b = cur_r_face->uv_0;
+            }
+            else if (is_2_clipped){ 
+                clipped_point = cur_r_face->position_2;
+                point_a = cur_r_face->position_0;
+                point_b = cur_r_face->position_1;
+                
+                clipped_normal = cur_r_face->normal_2;
+                normal_a = cur_r_face->normal_0;
+                normal_b = cur_r_face->normal_1;
+            
+                clipped_uv = cur_r_face->uv_2;
+                uv_a = cur_r_face->uv_0;
+                uv_b = cur_r_face->uv_1;
+            }
+
+            double fraction_a_to_clip = (camera.min_clip - clipped_point.z) / (point_a.z - clipped_point.z);                        
+            double fraction_b_to_clip = (camera.min_clip - clipped_point.z) / (point_b.z - clipped_point.z);                        
+
+            RI_vector_3 new_point_a, new_point_b;  // the new points that move along the polygon's edge to match the z value of min_clip.
+            RI_vector_3 new_normal_a, new_normal_b;  // they come from the clipped point which was originally only 1
+            RI_vector_2 new_uv_a, new_uv_b;
+            
+            vector_3_lerp(clipped_point, point_a, &new_point_a, fraction_a_to_clip);
+            vector_3_lerp(clipped_point, point_b, &new_point_b, fraction_b_to_clip);
+            
+            vector_3_lerp(clipped_normal, normal_a, &new_normal_a, fraction_a_to_clip);
+            vector_3_lerp(clipped_normal, normal_b, &new_normal_b, fraction_b_to_clip);
+            
+            vector_2_lerp(clipped_uv, uv_a, &new_uv_a, fraction_a_to_clip);
+            vector_2_lerp(clipped_uv, uv_b, &new_uv_b, fraction_b_to_clip);
+
+            // okay, now we have a quad (in clockwise order, point a, point b, new point b, new point a)
+            // quads are easy to turn into tris >w<
+
+            __global RI_renderable_face *cur_r_split_face = &renderable_faces[num_faces + face_index];
+
+            // cur_r_split_face->parent_actor = current_actor;
+
+            cur_r_split_face->should_render = 1;
+
+            // cur_r_split_face->material = cur_r_face->material;
+
+            cur_r_face->position_0 = point_a;
+            cur_r_face->position_1 = point_b;
+            cur_r_face->position_2 = new_point_a;
+
+            cur_r_face->normal_0 = normal_a;
+            cur_r_face->normal_1 = normal_b;
+            cur_r_face->normal_2 = new_normal_a;
+
+            cur_r_face->uv_0 = uv_a;
+            cur_r_face->uv_1 = uv_b;
+            cur_r_face->uv_2 = new_uv_a;
+
+            cur_r_split_face->position_0 = point_b;
+            cur_r_split_face->position_1 = new_point_b;
+            cur_r_split_face->position_2 = new_point_a;
+
+            cur_r_split_face->normal_0 = normal_b;
+            cur_r_split_face->normal_1 = new_normal_b;
+            cur_r_split_face->normal_2 = new_normal_a;
+
+            cur_r_split_face->uv_0 = uv_b;
+            cur_r_split_face->uv_1 = new_uv_b;
+            cur_r_split_face->uv_2 = new_uv_a;
+
+            cur_r_split_face->position_0.x = cur_r_split_face->position_0.x / cur_r_split_face->position_0.z * horizontal_fov_factor;
+            cur_r_split_face->position_0.y = cur_r_split_face->position_0.y / cur_r_split_face->position_0.z * vertical_fov_factor;
+            
+            cur_r_split_face->position_1.x = cur_r_split_face->position_1.x / cur_r_split_face->position_1.z * horizontal_fov_factor;
+            cur_r_split_face->position_1.y = cur_r_split_face->position_1.y / cur_r_split_face->position_1.z * vertical_fov_factor;
+
+            cur_r_split_face->position_2.x = cur_r_split_face->position_2.x / cur_r_split_face->position_2.z * horizontal_fov_factor;
+            cur_r_split_face->position_2.y = cur_r_split_face->position_2.y / cur_r_split_face->position_2.z * vertical_fov_factor;
+
+            cur_r_split_face->min_screen_x = cur_r_split_face->position_0.x; 
+            if (cur_r_split_face->position_1.x < cur_r_split_face->min_screen_x) cur_r_split_face->min_screen_x = cur_r_split_face->position_1.x;
+            if (cur_r_split_face->position_2.x < cur_r_split_face->min_screen_x) cur_r_split_face->min_screen_x = cur_r_split_face->position_2.x;
+            cur_r_split_face->min_screen_x = max(cur_r_split_face->min_screen_x, -width / 2); 
+
+            cur_r_split_face->max_screen_x = cur_r_split_face->position_0.x; 
+            if (cur_r_split_face->position_1.x > cur_r_split_face->max_screen_x) cur_r_split_face->max_screen_x = cur_r_split_face->position_1.x;
+            if (cur_r_split_face->position_2.x > cur_r_split_face->max_screen_x) cur_r_split_face->max_screen_x = cur_r_split_face->position_2.x;
+            cur_r_split_face->max_screen_x = min(cur_r_split_face->max_screen_x, width / 2); 
+
+            cur_r_split_face->min_screen_y = cur_r_split_face->position_0.y; 
+            if (cur_r_split_face->position_1.y < cur_r_split_face->min_screen_y) cur_r_split_face->min_screen_y = cur_r_split_face->position_1.y;
+            if (cur_r_split_face->position_2.y < cur_r_split_face->min_screen_y) cur_r_split_face->min_screen_y = cur_r_split_face->position_2.y;
+            cur_r_split_face->min_screen_y = max(cur_r_split_face->min_screen_y, -height / 2); 
+
+            cur_r_split_face->max_screen_y = cur_r_split_face->position_0.y; 
+            if (cur_r_split_face->position_1.y > cur_r_split_face->max_screen_y) cur_r_split_face->max_screen_y = cur_r_split_face->position_1.y;
+            if (cur_r_split_face->position_2.y > cur_r_split_face->max_screen_y) cur_r_split_face->max_screen_y = cur_r_split_face->position_2.y;
+            cur_r_split_face->max_screen_y = min(cur_r_split_face->max_screen_y, height / 2); 
+
+            break;
+        }
+
+        case 0:{ // no issues, ignore
+            break;
+        }
+    }
+
+    // current_actor.material->vertex_shader(&cur_r_face->position_0, &cur_r_face->position_1, &cur_r_face->position_2, horizontal_fov_factor, vertical_fov_factor);
+
+    cur_r_face->min_screen_x = pos_0->x; 
+    if (pos_1->x < cur_r_face->min_screen_x) cur_r_face->min_screen_x = pos_1->x;
+    if (pos_2->x < cur_r_face->min_screen_x) cur_r_face->min_screen_x = pos_2->x;
+    cur_r_face->min_screen_x = max(cur_r_face->min_screen_x, -width / 2); 
+
+    cur_r_face->max_screen_x = pos_0->x; 
+    if (pos_1->x > cur_r_face->max_screen_x) cur_r_face->max_screen_x = pos_1->x;
+    if (pos_2->x > cur_r_face->max_screen_x) cur_r_face->max_screen_x = pos_2->x;
+    cur_r_face->max_screen_x = min(cur_r_face->max_screen_x, width / 2); 
+
+    cur_r_face->min_screen_y = pos_0->y; 
+    if (pos_1->y < cur_r_face->min_screen_y) cur_r_face->min_screen_y = pos_1->y;
+    if (pos_2->y < cur_r_face->min_screen_y) cur_r_face->min_screen_y = pos_2->y;
+    cur_r_face->min_screen_y = max(cur_r_face->min_screen_y, -height / 2); 
+
+    cur_r_face->max_screen_y = pos_0->y; 
+    if (pos_1->y > cur_r_face->max_screen_y) cur_r_face->max_screen_y = pos_1->y;
+    if (pos_2->y > cur_r_face->max_screen_y) cur_r_face->max_screen_y = pos_2->y;
+    cur_r_face->max_screen_y = min(cur_r_face->max_screen_y, height / 2); 
+    
+    return;
+}
+
+__kernel void rasterizer(__global RI_renderable_face *renderable_faces, __global uint *frame_buffer, int width, int height, int half_width, int half_height, int number_of_renderable_faces, int number_of_split_renderable_faces){
+    int pixel_x = get_global_id(0); if (pixel_x >= width) return;
+    int pixel_y = get_global_id(1); if (pixel_y >= height) return;
+    int idx = pixel_y * width + pixel_x;
+
+    int x = pixel_x - half_width;
+    int y = pixel_y - half_height;
+
+    double z = INFINITY;
+
+    uint pixel_color = 0xFFFFFFFF;
+
+    for (int face_i = 0; face_i < number_of_renderable_faces + number_of_split_renderable_faces; ++face_i){
+        __global RI_renderable_face *current_face = &renderable_faces[face_i];
+        
+        if (!current_face->should_render) continue;
+        
+        RI_vector_2 uv_0 = current_face->uv_0;
+        RI_vector_2 uv_1 = current_face->uv_1;
+        RI_vector_2 uv_2 = current_face->uv_2;
+        
+        RI_vector_3 normal_0 = current_face->normal_0;
+        RI_vector_3 normal_1 = current_face->normal_1;
+        RI_vector_3 normal_2 = current_face->normal_2;
+        
+        RI_vector_3 pos_0 = current_face->position_0;
+        RI_vector_3 pos_1 = current_face->position_1;
+        RI_vector_3 pos_2 = current_face->position_2;
+        
+        if (x < current_face->min_screen_x || x > current_face->max_screen_x || y < current_face->min_screen_y || y > current_face->max_screen_y)
+            continue;
+        
+        double denominator, w0, w1, w2;
+
+        denominator = (pos_1.y - pos_2.y) * (pos_0.x - pos_2.x) + (pos_2.x - pos_1.x) * (pos_0.y - pos_2.y);
+        w0 = ((pos_1.y - pos_2.y) * (x - pos_2.x) + (pos_2.x - pos_1.x) * (y - pos_2.y)) / denominator;
+        w1 = ((pos_2.y - pos_0.y) * (x - pos_0.x) + (pos_0.x - pos_2.x) * (y - pos_0.y)) / denominator; 
+        w2 = 1.0 - w0 - w1; 
+        
+        double w_over_z = (w0 / pos_0.z + w1 / pos_1.z + w2 / pos_2.z); 
+        double interpolated_z = 1.0 / w_over_z;
+        
+        if (!(w0 >= 0 && w1 >= 0 && w2 >= 0)){    
+            continue;
+        }
+        
+        if (interpolated_z >= z){                        
+            continue;
+        }
+        
+        double alpha = 1;
+        
+        double ux, uy;
+        ux = uy = -1;
+        
+        RI_vector_3 interpolated_normal = {0};
+        
+        interpolated_normal.x = (w0 * (normal_0.x / pos_0.z) + w1 * (normal_1.x / pos_1.z) + w2 * (normal_2.x / pos_2.z)) / w_over_z;    
+        interpolated_normal.y = (w0 * (normal_0.y / pos_0.z) + w1 * (normal_1.y / pos_1.z) + w2 * (normal_2.y / pos_2.z)) / w_over_z;        
+        interpolated_normal.z = (w0 * (normal_0.z / pos_0.z) + w1 * (normal_1.z / pos_1.z) + w2 * (normal_2.z / pos_2.z)) / w_over_z;        
+        
+        pixel_color = 255 << 24 | (int)((interpolated_normal.x + 1.0) * 127.5) << 16 | (int)((interpolated_normal.y + 1.0) * 127.5) << 8 | (int)((interpolated_normal.z + 1.0) * 127.5);
+        z = interpolated_z;
+    }
+    
+    frame_buffer[idx] = pixel_color;
+
+    return;
+}

src/launch program/main.c

@@ -1,145 +1,60 @@
-#include <stdio.h>
-#include "../RasterIver/headers/rasteriver.h"
+#include "../headers/rasteriver.h"
 #include <time.h>
-#include <stdlib.h>
-
-int width = 400;
-int height = 400;
-
-int main(){ 
-    srand(time(NULL));                                                         
-
-    RI_SetFlag(RI_FLAG_DEBUG, 1);
-    RI_SetFlag(RI_FLAG_DEBUG_LEVEL, RI_DEBUG_HIGH);
-    RI_SetFlag(RI_FLAG_DEBUG_TICK, 0);
-    RI_SetFlag(RI_FLAG_DEBUG_FPS, 0);
-    RI_SetFlag(RI_FLAG_SHOW_FPS, 1);
-    RI_SetFlag(RI_FLAG_SHOW_FRAME, 0);
-    RI_SetFlag(RI_FLAG_SHOW_BUFFER, RI_BUFFER_COMPLETE);
-    RI_SetFlag(RI_FLAG_CLEAN_POLYGONS, 1);
-    RI_SetFlag(RI_FLAG_POPULATE_POLYGONS, 0);
-    RI_SetFlag(RI_FLAG_BE_MASTER_RENDERER, 1);
-    RI_SetFlag(RI_FLAG_HANDLE_SDL_EVENTS, 0);
-    RI_SetFlag(RI_FLAG_SHOW_INFO, 0);
-    RI_SetFlag(RI_FLAG_USE_CPU, 1);
-
-    RI_SetValue(RI_VALUE_WIREFRAME_SCALE, 0.06);
-    RI_SetValue(RI_VALUE_MINIMUM_CLIP, 90);
-
-    char prefix[50] = "[RASTERIVER IS AMAZING] ";
-    RI_SetDebugPrefix(prefix);
-    // RI_SetFpsCap(15);
-
-    if (RI_Init(width, height, "Rasteriver Test") == RI_ERROR){
+
+int main(){
+    RI_context* context = RI_get_context();
+    
+    context->window.width = 800;
+    context->window.height = 800;
+    context->window.title = "This is RasterIver 3.0!!!!!!!";
+    
+    if (RI_init() != 0){
+        printf("failed to init RI\n");
         return 1;
     }
 
-    RI_newObject object_buffer[9] = {
-        {10, 0, 100,          
-            -0.3, 0, 0, 0,          
-            5, 10, 30,       
-            RI_MATERIAL_HAS_TEXTURE, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {50, 0, 100,        
-            0, 0, 0, 0,          
-            10, 10, 10,        
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {-50, 0, 100,         
-            0, 0, 0, 0,          
-            10, 10, 10,      
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {0, 50, 100,       
-            0, 0, 0, 0,          
-            10, 10, 10,          
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {0, -50, 100,       
-            0, 0, 0, 0,          
-            10, 10, 10,         
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {-50, 50, 100,       
-            0, 0, 0, 0,          
-            10, 10, 10,         
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {-50, -50, 100,          
-            0, 0, 0, 0,          
-            10, 10, 10,      
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {50, 50, 100,          
-            0, 0, 0, 0,          
-            10, 10, 10,       
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        {50, -50, 100,        
-            0, 0, 0, 0,          
-            10, 10, 10,        
-            RI_PMP_TEXTURED, 
-            "objects/cube.obj", 
-            "textures/bill_mcdinner.png"},
-        };
-
-        int objects_to_request = 1;
-
-    RI_objects objects = RI_RequestObjects(object_buffer, objects_to_request);
-
-        for (int i = 0; i < objects_to_request; i++){
-            objects[i].material.albedo.a = 255;// * ((float)i / objects_to_request);
-            objects[i].material.albedo.r = 255;// * ((float)i / objects_to_request);
-            objects[i].material.albedo.g = 255;// * ((float)i / objects_to_request);
-            objects[i].material.albedo.b = 255;// * ((float)i / objects_to_request);
-        }
+    RI_scene *scene = RI_new_scene();
+
+    RI_actor *actor = RI_new_actor();
+
+    RI_load_mesh("objects/cube.obj", actor);
+    
+    actor->scale = (RI_vector_3){100, 100, 100};
+    actor->position = (RI_vector_3){0, 0, 0};
+    actor->rotation = (RI_vector_4){1, 0, 0, 0};
+
+    scene->actors = malloc(sizeof(RI_actor) * 10);
+
+    scene->actors[0] = actor;
+
+    scene->length_of_actors_array = 1;
+
+    long int start, end;
+    double fps = 0;
+
+    double delta_time = 0;
+    double delta_min = 0.00001;
+    double delta_max = 1;
+    while (context->is_running){
+        start = clock();
         
-        float frame = 0;
-        SDL_Event event;
-
-        int selected_triangle = -1;
-        RI_SetValue(RI_VALUE_SELECTED_TRIANGLE, selected_triangle);
-    while (RI_IsRunning() == RI_RUNNING){        
-        // objects[0].transform.rotation.x += rand() % 100 * 0.01;
-        // objects[0].transform.rotation.y += rand() % 100 * 0.02;
-        // objects[0].transform.rotation.z += rand() % 100 * 0.03;
-        while( SDL_PollEvent( &event ) ){
-                
-            switch( event.type ){
-                /* Keyboard event */
-                /* Pass the event data onto PrintKeyInfo() */
-                case SDL_KEYDOWN:
-                    selected_triangle = (selected_triangle + 1) % 12;
-    break;
-
-                /* SDL_QUIT event (window close) */
-                case SDL_QUIT:
-                    RI_Stop();
-                    break;
-
-                default:
-                    break;
-            }
-
-        }
-        for (int i = 0; i < objects_to_request; i++){
-        objects[0].transform.rotation.x += 0.05;
-
-            objects[i].transform.position.z = 110 + sin(frame) * 20;
-        }
-
-        frame -= 0.05;
-
-        RI_Tick();
+        RI_render(NULL, scene);
+
+        actor->position = (RI_vector_3){0, 0, 1000};
+
+        RI_euler_rotation_to_quaternion(&actor->rotation, (RI_vector_3){context->current_frame * 0.001, context->current_frame * 0.001, context->current_frame * 0.001});
+        
+        RI_tick();
+
+        end = clock();
+
+        delta_time = fmin(fmax((double)(end - start) / (double)(CLOCKS_PER_SEC), delta_min), delta_max);
+        fps = 1.0 / delta_time;
+
+        printf("%f\n", fps);
     }
 
-    RI_Stop();
+    free(scene->actors);
+
+    return 0;
 }

src/main/main.c

@@ -0,0 +1,615 @@
+// rasteriver.c
+
+#include <CL/cl.h>
+#include <SDL2/SDL.h>
+#include "../headers/rasteriver.h"
+#include "../headers/memory.h"
+
+RI_context context;
+
+#define RI_realloc(__ptr, __size) written_RI_realloc(__ptr, __size, __func__, __LINE__, context)
+#define RI_malloc(__size) written_RI_malloc(__size, __func__, __LINE__, context)
+#define RI_calloc(__nmemb, __size) written_RI_calloc(__nmemb, __size, __func__, __LINE__, context)
+#define RI_free(__ptr) written_RI_free(__ptr, __func__, __LINE__, context)
+
+#define PI 3.14159265359
+#define PI2 1.57079632679
+
+void debug(char *string, ...){
+    if (!context.should_debug)
+        return;
+
+    va_list args;
+    va_start(args, string);
+
+    char message[500];
+
+    strcpy(message, context.debug_prefix);
+
+    strcat(message, string);
+
+    vprintf(message, args);
+    printf("\n");
+
+    va_end(args);
+}
+
+RI_texture *RI_new_texture(int width, int height){
+    RI_texture *new_texture = RI_malloc(sizeof(RI_texture));
+
+    new_texture->image_buffer = RI_malloc(sizeof(uint32_t) * width * height);
+    new_texture->resolution.x = width;
+    new_texture->resolution.y = height;
+
+    return new_texture;
+}
+
+RI_material *RI_new_material(){
+    RI_material *new_material = RI_malloc(sizeof(RI_material));
+
+    new_material->albedo = 0xFFFF00FF;
+
+    return new_material;
+}
+
+RI_actor *RI_new_actor(){
+    RI_actor *new_actor = RI_malloc(sizeof(RI_actor));
+
+    if (context.defaults.default_actor){
+        *new_actor = *context.defaults.default_actor;
+    } else {
+        new_actor->position = (RI_vector_3){0, 0, 0};
+        new_actor->scale = (RI_vector_3){1, 1, 1};
+        new_actor->rotation = (RI_vector_4){1, 0, 0, 0};
+        new_actor->active = 1;
+    }
+
+    return new_actor;
+}
+
+RI_scene *RI_new_scene(){
+    RI_scene *new_scene = RI_malloc(sizeof(RI_scene));
+
+    new_scene->camera.FOV = PI2;
+    new_scene->camera.max_clip = 100000;
+    new_scene->camera.min_clip = 0.01;
+    new_scene->camera.position = (RI_vector_3){0, 0, 0};
+    new_scene->camera.rotation = (RI_vector_4){1, 0, 0, 0};
+
+    return new_scene;
+}
+
+RI_mesh *RI_load_mesh(char *filename, RI_actor *actor){
+    int previous_face_count = context.opencl.face_count;
+    int previous_vertecies_count = context.opencl.vertex_count;
+    int previous_normals_count = context.opencl.normal_count;
+    int previous_uvs_count = context.opencl.uv_count;
+
+    FILE *file = fopen(filename, "r");
+
+    if (!file){
+        debug("[Mesh Loader] Error! File \"%s\" not found", filename);
+        return NULL;
+    }
+    
+    char line[512];
+    
+    int face_count = 0;
+
+    while (fgets(line, sizeof(line), file)) {
+        if (line[0] == 'f' && line[1] == ' ') { // face
+            ++face_count;
+            ++context.opencl.face_count;
+        }
+        else if (line[0] == 'v'){
+            if (line[1] == ' ') { // vertex
+                ++context.opencl.vertex_count;
+            }
+            else if (line[1] == 'n') { // normal
+                ++context.opencl.normal_count;
+            }
+            else if (line[1] == 't') { // UV
+                ++context.opencl.uv_count;
+            }
+        }
+    }
+
+    rewind(file);
+
+    context.opencl.faces = RI_realloc(context.opencl.faces, sizeof(RI_face) * context.opencl.face_count);
+    context.opencl.vertecies = RI_realloc(context.opencl.vertecies, sizeof(RI_vector_3) * context.opencl.vertex_count);
+    context.opencl.normals = RI_realloc(context.opencl.normals, sizeof(RI_vector_3) * context.opencl.normal_count);
+    context.opencl.uvs = RI_realloc(context.opencl.uvs, sizeof(RI_vector_2) * context.opencl.uv_count);
+
+    int current_face_index = previous_face_count;
+    int current_vertex_index = previous_vertecies_count;
+    int current_normal_index = previous_normals_count;
+    int current_uv_index = previous_uvs_count;
+
+    int has_normals, has_uvs;
+    has_normals = has_uvs = 0;
+
+    while (fgets(line, sizeof(line), file)) {
+        if (line[0] == 'f' && line[1] == ' ') {
+            int vertex_0_index, vertex_1_index, vertex_2_index, normal_0_index, normal_1_index, normal_2_index, uv_0_index, uv_1_index, uv_2_index;
+
+            int matches = sscanf(line, "f %d/%d/%d %d/%d/%d %d/%d/%d/", 
+                &vertex_0_index, &uv_0_index, &normal_0_index, 
+                &vertex_1_index, &uv_1_index, &normal_1_index, 
+                &vertex_2_index, &uv_2_index, &normal_2_index);
+
+            if (matches != 9){
+                vertex_0_index = -1;
+                vertex_1_index = -1;
+                vertex_2_index = -1;
+                
+                normal_0_index = -1;
+                normal_1_index = -1;
+                normal_2_index = -1;
+                
+                uv_0_index = -1;
+                uv_1_index = -1;
+                uv_2_index = -1;
+
+                if (strchr(line, '/')){
+                    sscanf(line, "f %d//%d %d//%d %d//%d", 
+                        &vertex_0_index, &normal_0_index, 
+                        &vertex_1_index, &normal_1_index, 
+                        &vertex_2_index, &normal_2_index);
+                
+                    has_normals = 1;
+                }
+                else {
+                    sscanf(line, "f %d %d %d", 
+                        &vertex_0_index, 
+                        &vertex_1_index, 
+                        &vertex_2_index);
+                }
+            }
+            else {
+                has_normals = has_uvs = 1;
+            }
+
+            context.opencl.faces[current_face_index].position_0_index = vertex_0_index - 1 + previous_vertecies_count;
+            context.opencl.faces[current_face_index].position_1_index = vertex_1_index - 1 + previous_vertecies_count;
+            context.opencl.faces[current_face_index].position_2_index = vertex_2_index - 1 + previous_vertecies_count;
+
+            context.opencl.faces[current_face_index].normal_0_index = normal_0_index - 1 + previous_normals_count;
+            context.opencl.faces[current_face_index].normal_1_index = normal_1_index - 1 + previous_normals_count;
+            context.opencl.faces[current_face_index].normal_2_index = normal_2_index - 1 + previous_normals_count;
+            
+            context.opencl.faces[current_face_index].uv_0_index = uv_0_index - 1 + previous_uvs_count;
+            context.opencl.faces[current_face_index].uv_1_index = uv_1_index - 1 + previous_uvs_count;
+            context.opencl.faces[current_face_index].uv_2_index = uv_2_index - 1 + previous_uvs_count;
+
+            context.opencl.faces[current_face_index].should_render = 1;
+
+            ++current_face_index;
+        }
+        else if (line[0] == 'v' && line[1] == ' ') {
+            double x, y, z;
+            
+            sscanf(line, "v %lf %lf %lf", &x, &y, &z);
+
+            context.opencl.vertecies[current_vertex_index].x = x;
+            context.opencl.vertecies[current_vertex_index].y = y;
+            context.opencl.vertecies[current_vertex_index].z = z;
+
+            ++current_vertex_index;
+        } 
+        else if (line[0] == 'v' && line[1] == 'n') {
+            double x, y, z;
+            
+            sscanf(line, "vn %lf %lf %lf", &x, &y, &z);
+
+            context.opencl.normals[current_normal_index].x = x;
+            context.opencl.normals[current_normal_index].y = y;
+            context.opencl.normals[current_normal_index].z = z;
+
+            ++current_normal_index;
+        }
+        else if (line[0] == 'v' && line[1] == 't') {
+            double x, y, z;
+
+            sscanf(line, "vt %lf %lf %lf", &x, &y, &z);
+
+            context.opencl.uvs[current_uv_index].x = x;
+            context.opencl.uvs[current_uv_index].y = y;
+            // UVS are almost always 2D so we don't need Z (the type itself is a vector 2f, not 3f) 
+
+            ++current_uv_index;
+        } 
+    }
+
+    char* loading_mesh_notice_string;
+
+    if (has_normals && !has_uvs) loading_mesh_notice_string = "normals";
+    else if (!has_normals && has_uvs) loading_mesh_notice_string = "UVs";
+    else if (!has_normals && !has_uvs) loading_mesh_notice_string = "normals and UVs";
+    
+    if (!has_normals || !has_uvs) debug("[Mesh Loader] Notice! Mesh \"%s\" is missing %s", filename, loading_mesh_notice_string);
+    
+    actor->has_normals = has_normals;
+    actor->has_uvs = has_uvs;
+
+    actor->face_count = context.opencl.face_count - previous_face_count;
+    actor->face_index = previous_face_count;
+
+    debug("[Mesh Loader] Loaded mesh \"%s\"! %d faces, %d verticies, %d normals, %d uvs", filename, current_face_index, current_vertex_index, current_normal_index, current_uv_index); 
+
+    clFinish(context.opencl.queue);
+
+    if (previous_face_count != context.opencl.face_count) {
+        if (context.opencl.faces_mem_buffer) clReleaseMemObject(context.opencl.faces_mem_buffer);
+
+        context.opencl.faces_mem_buffer = clCreateBuffer(context.opencl.context, CL_MEM_READ_WRITE, sizeof(RI_face) * context.opencl.face_count, NULL, NULL);
+
+        clSetKernelArg(context.opencl.transformation_kernel, 0, sizeof(cl_mem), &context.opencl.faces_mem_buffer);
+    }
+
+    if (previous_vertecies_count != context.opencl.vertex_count) {
+        if (context.opencl.vertecies_mem_buffer) clReleaseMemObject(context.opencl.vertecies_mem_buffer);
+
+        context.opencl.vertecies_mem_buffer = clCreateBuffer(context.opencl.context, CL_MEM_READ_WRITE, sizeof(RI_vector_3) * context.opencl.vertex_count, NULL, NULL);
+
+        clSetKernelArg(context.opencl.transformation_kernel, 1, sizeof(cl_mem), &context.opencl.vertecies_mem_buffer);
+    }
+
+    if (previous_normals_count != context.opencl.normal_count) {
+        if (context.opencl.normals_mem_buffer) clReleaseMemObject(context.opencl.normals_mem_buffer);
+
+        context.opencl.normals_mem_buffer = clCreateBuffer(context.opencl.context, CL_MEM_READ_WRITE, sizeof(RI_vector_3) * context.opencl.normal_count, NULL, NULL);
+
+        clSetKernelArg(context.opencl.transformation_kernel, 2, sizeof(cl_mem), &context.opencl.normals_mem_buffer);
+    }
+
+    if (previous_uvs_count != context.opencl.uv_count) {
+        if (context.opencl.uvs_mem_buffer) clReleaseMemObject(context.opencl.uvs_mem_buffer);
+
+        context.opencl.uvs_mem_buffer = clCreateBuffer(context.opencl.context, CL_MEM_READ_WRITE, sizeof(RI_vector_2) * context.opencl.uv_count, NULL, NULL);
+
+        clSetKernelArg(context.opencl.transformation_kernel, 3, sizeof(cl_mem), &context.opencl.uvs_mem_buffer);
+    }
+
+    fclose(file);
+}
+
+void RI_render(RI_texture *target_texture, RI_scene *scene){
+    if (!target_texture){
+        target_texture = context.sdl.frame_buffer;
+    }
+
+    // transformer 
+    
+    double horizontal_fov_factor = (double)target_texture->resolution.x / tanf(0.5 * scene->camera.FOV);
+    double vertical_fov_factor = (double)target_texture->resolution.y / tanf(0.5 * scene->camera.FOV);
+    
+
+    // kernel args
+    clSetKernelArg(context.opencl.transformation_kernel, 6, sizeof(RI_camera), &scene->camera);
+    clSetKernelArg(context.opencl.transformation_kernel, 11, sizeof(double), &horizontal_fov_factor);
+    clSetKernelArg(context.opencl.transformation_kernel, 12, sizeof(double), &vertical_fov_factor);
+
+
+    // count faces
+    scene->face_count = 0;
+    for (int actor_index = 0; actor_index < scene->length_of_actors_array; ++actor_index){
+        scene->face_count += scene->actors[actor_index]->face_count;
+    }
+
+
+    // allocate faces_to_render if face count increases
+    if (scene->face_count > context.opencl.length_of_renderable_faces_array){
+        context.opencl.faces_to_render = RI_realloc(context.opencl.faces_to_render, sizeof(RI_renderable_face) * scene->face_count * 2); // x2 because faces can be split
+    
+        context.opencl.length_of_renderable_faces_array = scene->face_count;
+    }
+
+    
+    // set faces_to_render to zero
+    memset(context.opencl.faces_to_render, 0, sizeof(RI_renderable_face) * scene->face_count * 2);
+
+    clSetKernelArg(context.opencl.transformation_kernel, 4, sizeof(cl_mem), &context.opencl.renderable_faces_mem_buffer);
+
+    context.current_renderable_face_index = 0;
+    context.current_split_renderable_face_index = 0;
+
+    debug("transforming polygons...");
+
+    // transform polygons
+    for (int actor_index = 0; actor_index < scene->length_of_actors_array; ++actor_index){
+        debug("actor index: %d face count: %d", actor_index, scene->actors[actor_index]->face_count);
+        
+        if (scene->actors[actor_index]->face_count <= 0) continue;
+        
+        const size_t t_global_work_size[1] = {scene->actors[actor_index]->face_count};
+        const size_t t_local_work_size[1] = {(int)fmin(scene->actors[actor_index]->face_count, 32)};
+
+        debug("transformer global work size: {%d}", scene->actors[actor_index]->face_count);    
+        debug("transformer local work size: {%d}", (int)fmin(scene->actors[actor_index]->face_count, 32));    
+
+        clSetKernelArg(context.opencl.transformation_kernel, 7, sizeof(int), &actor_index);
+        clSetKernelArg(context.opencl.transformation_kernel, 8, sizeof(int), &scene->actors[actor_index]->face_count);
+        
+        clSetKernelArg(context.opencl.transformation_kernel, 5, sizeof(RI_actor), &scene->actors[actor_index]);
+
+        debug("running kernel...");
+
+        clEnqueueNDRangeKernel(context.opencl.queue, context.opencl.transformation_kernel, 1, NULL, t_global_work_size, t_local_work_size, 0, NULL, NULL);
+        clFinish(context.opencl.queue);
+    
+        debug("done");
+    }
+
+    debug("done");    
+    
+
+    // rasterize
+
+    // set width, height and kernel width, height
+    int x = context.window.width;
+    int y = context.window.height;
+
+    int x_div_32 = ceil(context.window.width / 32.0);
+    int y_div_32 = ceil(context.window.height / 32.0);
+
+    if (context.window.width % 32 != 0)
+        x = 32 * x_div_32;
+
+    if (context.window.height % 32 != 0)
+        y = 32 * y_div_32;
+
+    const size_t r_global_work_size[2] = {x, y};
+    const size_t r_local_work_size[2] = {32, 32};
+
+    debug("rasterizer global work size: {%d, %d}", x, y);    
+    debug("rasterizer local work size: {%d, %d}", 32, 32);    
+
+    // kernel args
+    clSetKernelArg(context.opencl.rasterization_kernel, 0, sizeof(cl_mem), &context.opencl.renderable_faces_mem_buffer);
+    clSetKernelArg(context.opencl.rasterization_kernel, 6, sizeof(int), &context.current_renderable_face_index);
+    clSetKernelArg(context.opencl.rasterization_kernel, 7, sizeof(int), &context.current_split_renderable_face_index);
+
+    debug("rasterizing...");
+
+    // run raster kernel
+    clEnqueueNDRangeKernel(context.opencl.queue, context.opencl.rasterization_kernel, 2, NULL, r_global_work_size, r_local_work_size, 0, NULL, NULL);
+    clFinish(context.opencl.queue);
+    
+    debug("done\ncopying frame buffer...");
+
+    // put GPU frame buffer into CPU
+    clEnqueueReadBuffer(context.opencl.queue, context.opencl.frame_buffer_mem_buffer, CL_TRUE, 0, context.window.width * context.window.height * sizeof(uint32_t), context.sdl.frame_buffer->image_buffer, 0, NULL, NULL);
+    clFinish(context.opencl.queue);
+
+    debug("done");
+}
+
+void RI_tick(){
+    SDL_Event event;
+
+    while (SDL_PollEvent(&event)){
+        switch (event.type){
+            case SDL_QUIT: {
+                context.is_running = ri_false;
+
+                break;
+            }
+
+            default: {
+                break;
+            }
+        }
+    }
+
+    SDL_LockTexture(context.sdl.frame_buffer_texture, NULL, (void*)&context.sdl.frame_buffer_intermediate, &context.sdl.pitch);
+
+    memcpy(context.sdl.frame_buffer_intermediate, context.sdl.frame_buffer->image_buffer, context.window.width * context.window.height * sizeof(uint32_t));
+
+    SDL_UnlockTexture(context.sdl.frame_buffer_texture);
+
+    SDL_RenderCopy(context.sdl.renderer, context.sdl.frame_buffer_texture, NULL, NULL);
+    SDL_RenderPresent(context.sdl.renderer);
+
+    ++context.current_frame;
+
+    return;
+}
+
+RI_context *RI_get_context(){
+    context.sdl = (RI_SDL){NULL, NULL, NULL, NULL, 0};
+    context.window = (RI_window){800, 800, 400, 400, "RasterIver Window"};
+
+    return &context;
+} 
+
+// Convert a CL file to a string
+char *load_kernel_source(const char *filename) {
+    FILE *f = fopen(filename, "rb");
+
+    if (f == NULL){
+        debug("couldn't open kernel file \"%s\"", filename);
+    }
+
+    fseek(f, 0, SEEK_END);
+    size_t size = ftell(f);
+    rewind(f);
+    char *source = malloc(size + 1);
+    fread(source, 1, size, f);
+    source[size] = '\0';
+    fclose(f);
+    return source;
+}
+
+int RI_init(){
+    context.window.half_width = context.window.width / 2;
+    context.window.half_height = context.window.height / 2;
+
+    context.current_frame = 0;
+
+    // init SDL
+    context.sdl.window = SDL_CreateWindow(context.window.title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, context.window.width, context.window.height, 0);
+    context.sdl.renderer = SDL_CreateRenderer(context.sdl.window, -1, SDL_RENDERER_ACCELERATED);
+    context.sdl.frame_buffer_texture = SDL_CreateTexture(context.sdl.renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, context.window.width, context.window.height);
+
+    context.sdl.frame_buffer_intermediate = malloc(sizeof(uint32_t) * context.window.width * context.window.height);
+    context.sdl.frame_buffer = RI_new_texture(context.window.width, context.window.height);
+
+    context.is_running = ri_true;
+    context.should_debug = ri_true;
+
+    context.debug_prefix = "[RasterIver] ";
+
+    context.defaults.default_actor = RI_new_actor();
+    
+    RI_load_mesh("objects/cube.obj", context.defaults.default_actor);
+
+    // init OpenCL
+ 
+    context.opencl.length_of_renderable_faces_array = 10000; // allocate 10,000 faces so we dont have to worry about it
+    context.opencl.face_count = 0;
+    context.opencl.vertex_count = 0;
+    context.opencl.normal_count = 0;
+    context.opencl.uv_count = 0;
+    
+    context.opencl.faces_to_render = RI_malloc(sizeof(RI_renderable_face) * context.opencl.length_of_renderable_faces_array);
+    context.opencl.faces = RI_malloc(sizeof(RI_face) * context.opencl.face_count);
+
+    cl_int error;
+
+    cl_uint num_platforms = 0;
+    error = clGetPlatformIDs(0, NULL, &num_platforms);
+
+    cl_platform_id *platforms = malloc(sizeof(cl_platform_id) * num_platforms);
+    error = clGetPlatformIDs(num_platforms, platforms, NULL);
+
+    cl_device_id *devices; 
+    
+    cl_platform_id chosen_platform = NULL;
+    char pname[256];
+    for (cl_uint i = 0; i < num_platforms; i++) {
+        error = clGetPlatformInfo(platforms[i], CL_PLATFORM_NAME, sizeof(pname), pname, NULL);
+
+        debug("get platform info result: %d", error);
+
+        cl_uint num_devices = 0;
+        error = clGetDeviceIDs(platforms[i], CL_DEVICE_TYPE_ALL, 0, NULL, &num_devices);
+
+        debug("num devices result: %d", error);
+
+        devices = malloc(sizeof(cl_device_id) * num_devices);
+        error = clGetDeviceIDs(platforms[i], CL_DEVICE_TYPE_ALL, num_devices, devices, NULL);
+
+        if (i == 1){
+            context.opencl.device = devices[0];
+        }
+
+        debug("get device ids result: %d", error);
+
+        debug("-platform #%d: NAME: %s | DEVICE COUNT: %d", i, pname, num_devices);
+
+        for (int j = 0; j < num_devices; ++j){
+            debug("-\\ device #%d: ID: %u", j, devices[j]);
+        }
+
+        free(devices);
+    }
+
+    clGetPlatformInfo(chosen_platform, CL_PLATFORM_NAME, sizeof(pname), pname, NULL);
+
+    context.opencl.platform = platforms[0];
+
+    debug("device id: %u", context.opencl.device);
+
+    context.opencl.context = clCreateContext(NULL, 1, &context.opencl.device, NULL, NULL, NULL);
+    context.opencl.queue = clCreateCommandQueue(context.opencl.context, context.opencl.device, 0, &error);
+
+    // build programs
+
+    char *program_source = load_kernel_source("src/kernels/kernels.cl");    
+    cl_program rasterization_program = clCreateProgramWithSource(context.opencl.context, 1, (const char**)&program_source, NULL, NULL);
+    free(program_source);
+
+    cl_int result = clBuildProgram(rasterization_program, 1, &context.opencl.device, "", NULL, NULL);
+
+    if (result != CL_SUCCESS){
+        char log[256];
+
+        debug("rasterization program build failed (%d). Log: \n  %s", clGetProgramBuildInfo(rasterization_program, context.opencl.device, CL_PROGRAM_BUILD_LOG, 10000, log, NULL), log);
+    
+        return 1;
+    }
+
+    // kernels
+
+    context.opencl.rasterization_kernel = clCreateKernel(rasterization_program, "rasterizer", &error);
+
+    if (error != CL_SUCCESS){
+        debug("couldn't create rasterizer kernel");
+        return 1;
+    }
+
+    context.opencl.transformation_kernel = clCreateKernel(rasterization_program, "transformer", &error);
+
+    if (error != CL_SUCCESS){
+        debug("couldn't create transformer kernel");
+        return 1;
+    }
+
+    // rasterizer
+
+    context.opencl.renderable_faces_mem_buffer = clCreateBuffer(context.opencl.context, CL_MEM_READ_WRITE, sizeof(RI_renderable_face) * context.opencl.length_of_renderable_faces_array, NULL, &error);
+    
+    if (error != CL_SUCCESS){
+        debug("couldn't create renderable faces memory buffer");
+        return 1;
+    }
+    
+    context.opencl.frame_buffer_mem_buffer = clCreateBuffer(context.opencl.context, CL_MEM_READ_WRITE, sizeof(uint32_t) * context.window.width * context.window.height, NULL, &error);
+
+    if (error != CL_SUCCESS || !context.opencl.frame_buffer_mem_buffer){
+        debug("couldn't create frame buffer memory buffer");
+        return 1;
+    }
+
+// rasterizer(__global RI_renderable_face *renderable_faces, __global uint *frame_buffer, 
+//            int width, int height, int half_width, int half_height, int number_of_renderable_faces, 
+//            int number_of_split_renderable_faces)
+
+    clSetKernelArg(context.opencl.rasterization_kernel, 0, sizeof(cl_mem), &context.opencl.renderable_faces_mem_buffer);
+    clSetKernelArg(context.opencl.rasterization_kernel, 1, sizeof(cl_mem), &context.opencl.frame_buffer_mem_buffer);
+    clSetKernelArg(context.opencl.rasterization_kernel, 2, sizeof(int), &context.window.width);
+    clSetKernelArg(context.opencl.rasterization_kernel, 3, sizeof(int), &context.window.height);
+    clSetKernelArg(context.opencl.rasterization_kernel, 4, sizeof(int), &context.window.half_width);
+    clSetKernelArg(context.opencl.rasterization_kernel, 5, sizeof(int), &context.window.half_height);
+    clSetKernelArg(context.opencl.rasterization_kernel, 6, sizeof(int), &context.current_renderable_face_index);
+    clSetKernelArg(context.opencl.rasterization_kernel, 7, sizeof(int), &context.current_split_renderable_face_index);
+
+    // transformer
+
+    context.opencl.faces_mem_buffer = NULL;
+    context.opencl.vertecies_mem_buffer = NULL;
+    context.opencl.normals_mem_buffer = NULL;
+    context.opencl.uvs_mem_buffer = NULL;
+
+// transformer(__global RI_face *faces, __global RI_vector_3 *vertecies, __global RI_vector_3 *normals, 
+//             __global RI_vector_2 *uvs, __global RI_renderable_face *renderable_faces, RI_actor current_actor, 
+//             RI_camera camera, int current_actor_index, int num_faces, int width, int height, 
+//             double horizontal_fov_factor, double vertical_fov_factor)
+    
+    // clSetKernelArg(context.opencl.transformation_kernel, 0, sizeof(cl_mem), &context.opencl.faces_mem_buffer);
+    // clSetKernelArg(context.opencl.transformation_kernel, 1, sizeof(cl_mem), &context.opencl.vertecies_mem_buffer);
+    // clSetKernelArg(context.opencl.transformation_kernel, 2, sizeof(cl_mem), &context.opencl.normals_mem_buffer);
+    // clSetKernelArg(context.opencl.transformation_kernel, 3, sizeof(cl_mem), &context.opencl.uvs_mem_buffer);
+    // clSetKernelArg(context.opencl.transformation_kernel, 4, sizeof(cl_mem), &context.opencl.renderable_faces_mem_buffer);
+    // clSetKernelArg(context.opencl.transformation_kernel, 5, sizeof(RI_actor), &context.window.half_height);
+    // clSetKernelArg(context.opencl.transformation_kernel, 6, sizeof(RI_camera), &context.current_renderable_face_index);
+    // clSetKernelArg(context.opencl.transformation_kernel, 7, sizeof(int), &actor_index);
+    // clSetKernelArg(context.opencl.transformation_kernel, 8, sizeof(int), &face_count);
+    clSetKernelArg(context.opencl.transformation_kernel, 9, sizeof(int), &context.window.width);
+    clSetKernelArg(context.opencl.transformation_kernel, 10, sizeof(int), &context.window.height);
+    // clSetKernelArg(context.opencl.transformation_kernel, 11, sizeof(double), &horizontal_fov_factor);
+    // clSetKernelArg(context.opencl.transformation_kernel, 12, sizeof(double), &vertical_fov_factor);
+
+    return 0;
+}

src/scripts/build_all.sh

@@ -1,4 +0,0 @@
-echo "[COMPILER] Building Rasteriver"
-./lib_build.sh $1
-echo "[COMPILER] Building Main"
-./build.sh $2

src/scripts/build_rasteriver.sh

@@ -1,3 +0,0 @@
-echo "[LIB]      Building..."
-gcc  -Wall -Wextra -D CL_TARGET_OPENCL_VERSION=120 -fPIC -shared -o librasteriver.so $1 -lc -lSDL2 -lm -lOpenCL
-echo "[LIB]      Built"

src/scripts/build_test_program.sh

@@ -1,3 +0,0 @@
-echo "[MAIN]     Building..."
-gcc -g -Wall -Wextra -D CL_TARGET_OPENCL_VERSION=120 $1 -o main.bin -L. -lrasteriver -Wl,-rpath=.
-echo "[MAIN]     Built"

src/scripts/dcopy.sh

@@ -1,3 +0,0 @@
-echo "[MAIN]     Building..."
-gcc  -Wall -Wextra -D CL_TARGET_OPENCL_VERSION=120 $1 -o main.bin -lSDL2 -lm -lOpenCL
-echo "[MAIN]     Built"

src/scripts/debug.sh

@@ -1,6 +0,0 @@
-clear
-echo building...
-gcc -g -Wall -Wextra -D CL_TARGET_OPENCL_VERSION=120 $1 -o main.bin -lSDL2 -lm -lOpenCL
-echo built...
-echo debugging...
-gdb ./main.bin

val

@@ -1 +1 @@
-valgrind --leak-check=full --track-origins=yes ./builds/final\ binaries/main.bin
+valgrind --leak-check=full --track-origins=yes ./builds/main.bin