/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2006 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

slouken@libsdl.org

*/

#include "SDL_config.h"

#include "SDL_video.h"

#include "SDL_opengl.h"

#include "SDL_sysvideo.h"

#include "SDL_pixels_c.h"

#include "SDL_rect_c.h"

#include "SDL_yuv_sw_c.h"

#ifdef __MACOSX__

#include <OpenGL/OpenGL.h>

#endif

/* OpenGL renderer implementation */

/* Details on optimizing the texture path on Mac OS X:

http://developer.apple.com/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_texturedata/chapter_10_section_2.html

*/

/* !!! FIXME: this should go in a higher level than the GL renderer. */

static __inline__ int

bytes_per_pixel(const Uint32 format)

{

if (!SDL_ISPIXELFORMAT_FOURCC(format)) {

return SDL_BYTESPERPIXEL(format);

}

/* FOURCC format */

case SDL_PIXELFORMAT_YV12:

case SDL_PIXELFORMAT_IYUV:

case SDL_PIXELFORMAT_YUY2:

return 2;

default:

}

}

static const float inv255f = 1.0f / 255.0f;

static int GL_QueryTexturePixels(SDL_Renderer * renderer,

SDL_Texture * texture, void **pixels,

int *pitch);

static int GL_SetTexturePalette(SDL_Renderer * renderer,

SDL_Texture * texture,

const SDL_Color * colors, int firstcolor,

int ncolors);

static int GL_GetTexturePalette(SDL_Renderer * renderer,

SDL_Texture * texture, SDL_Color * colors,

int firstcolor, int ncolors);

static int GL_SetTextureColorMod(SDL_Renderer * renderer,

SDL_Texture * texture);

static int GL_SetTextureAlphaMod(SDL_Renderer * renderer,

SDL_Texture * texture);

static int GL_SetTextureBlendMode(SDL_Renderer * renderer,

SDL_Texture * texture);

static int GL_SetTextureScaleMode(SDL_Renderer * renderer,

SDL_Texture * texture);

static int GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,

const SDL_Rect * rect, const void *pixels,

int pitch);

static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,

const SDL_Rect * rect, int markDirty, void **pixels,

int *pitch);

static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);

static void GL_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,

int numrects, const SDL_Rect * rects);

static int GL_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,

Uint8 a, const SDL_Rect * rect);

static void GL_RenderPresent(SDL_Renderer * renderer);

static void GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);

static void GL_DestroyRenderer(SDL_Renderer * renderer);

SDL_RenderDriver GL_RenderDriver = {

GL_CreateRenderer,

{

"opengl",

(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD |

SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),

(SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |

SDL_TEXTUREMODULATE_ALPHA),

(SDL_TEXTUREBLENDMODE_NONE | SDL_TEXTUREBLENDMODE_MASK |

SDL_TEXTUREBLENDMODE_BLEND | SDL_TEXTUREBLENDMODE_ADD |

SDL_TEXTUREBLENDMODE_MOD),

(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST |

SDL_TEXTURESCALEMODE_SLOW),

SDL_PIXELFORMAT_INDEX1LSB,

SDL_PIXELFORMAT_INDEX1MSB,

SDL_PIXELFORMAT_INDEX8,

SDL_PIXELFORMAT_RGB332,

SDL_PIXELFORMAT_RGB444,

SDL_PIXELFORMAT_RGB555,

SDL_PIXELFORMAT_ARGB4444,

SDL_PIXELFORMAT_ARGB1555,

SDL_PIXELFORMAT_RGB565,

SDL_PIXELFORMAT_RGB24,

SDL_PIXELFORMAT_BGR24,

SDL_PIXELFORMAT_RGB888,

SDL_PIXELFORMAT_BGR888,

SDL_PIXELFORMAT_ARGB8888,

SDL_PIXELFORMAT_ABGR8888,

0,

0}

};

typedef struct

{

SDL_GLContext context;

int blendMode;

int scaleMode;

/* OpenGL functions */

#define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;

#include "SDL_glfuncs.h"

#undef SDL_PROC

PFNGLCOLORTABLEEXTPROC glColorTableEXT;

void (*glTextureRangeAPPLE) (GLenum target, GLsizei length,

const GLvoid * pointer);

PFNGLGETPROGRAMIVARBPROC glGetProgramivARB;

PFNGLGETPROGRAMSTRINGARBPROC glGetProgramStringARB;

PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB;

PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB;

PFNGLGENPROGRAMSARBPROC glGenProgramsARB;

PFNGLBINDPROGRAMARBPROC glBindProgramARB;

PFNGLPROGRAMSTRINGARBPROC glProgramStringARB;

/* (optional) fragment programs */

GLuint fragment_program_UYVY;

} GL_RenderData;

typedef struct

{

GLuint texture;

GLfloat texw;

GLfloat texh;

GLenum format;

GLenum formattype;

void *pixels;

int pitch;

} GL_TextureData;

static void

GL_SetError(const char *prefix, GLenum result)

{

const char *error;

switch (result) {

case GL_NO_ERROR:

error = "GL_NO_ERROR";

break;

case GL_INVALID_ENUM:

error = "GL_INVALID_ENUM";

break;

case GL_INVALID_VALUE:

error = "GL_INVALID_VALUE";

break;

case GL_INVALID_OPERATION:

error = "GL_INVALID_OPERATION";

break;

case GL_STACK_OVERFLOW:

error = "GL_STACK_OVERFLOW";

break;

case GL_STACK_UNDERFLOW:

error = "GL_STACK_UNDERFLOW";

break;

case GL_OUT_OF_MEMORY:

error = "GL_OUT_OF_MEMORY";

break;

case GL_TABLE_TOO_LARGE:

error = "GL_TABLE_TOO_LARGE";

break;

default:

error = "UNKNOWN";

break;

}

SDL_SetError("%s: %s", prefix, error);

}

static int

GL_LoadFunctions(GL_RenderData * data)

{

#if defined(__QNXNTO__) && (_NTO_VERSION < 630)

#define __SDL_NOGETPROCADDR__

#elif defined(__MINT__)

#define __SDL_NOGETPROCADDR__

#endif

#ifdef __SDL_NOGETPROCADDR__

#define SDL_PROC(ret,func,params) data->func=func;

#else

#define SDL_PROC(ret,func,params) \

do { \

data->func = SDL_GL_GetProcAddress(#func); \

if ( ! data->func ) { \

SDL_SetError("Couldn't load GL function %s: %s\n", #func, SDL_GetError()); \

return -1; \

} \

} while ( 0 );

#endif /* __SDL_NOGETPROCADDR__ */

#include "SDL_glfuncs.h"

#undef SDL_PROC

return 0;

}

void

GL_AddRenderDriver(_THIS)

{

SDL_AddRenderDriver(0, &GL_RenderDriver);

}

}

SDL_Renderer *

GL_CreateRenderer(SDL_Window * window, Uint32 flags)

{

SDL_Renderer *renderer;

GL_RenderData *data;

/* Render directly to the window, unless we're compositing */

#ifndef __MACOSX__

if (flags & SDL_RENDERER_SINGLEBUFFER) {

SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0);

}

#endif

return NULL;

}

}

if (!renderer) {

SDL_OutOfMemory();

return NULL;

}

if (!data) {

GL_DestroyRenderer(renderer);

SDL_OutOfMemory();

return NULL;

}

renderer->SetTexturePalette = GL_SetTexturePalette;

renderer->GetTexturePalette = GL_GetTexturePalette;

renderer->SetTextureColorMod = GL_SetTextureColorMod;

renderer->SetTextureAlphaMod = GL_SetTextureAlphaMod;

renderer->SetTextureBlendMode = GL_SetTextureBlendMode;

renderer->SetTextureScaleMode = GL_SetTextureScaleMode;

renderer->UpdateTexture = GL_UpdateTexture;

renderer->LockTexture = GL_LockTexture;

renderer->UnlockTexture = GL_UnlockTexture;

renderer->DirtyTexture = GL_DirtyTexture;

renderer->RenderFill = GL_RenderFill;

renderer->RenderCopy = GL_RenderCopy;

renderer->RenderPresent = GL_RenderPresent;

renderer->DestroyTexture = GL_DestroyTexture;

renderer->DestroyRenderer = GL_DestroyRenderer;

renderer->info = GL_RenderDriver.info;

renderer->window = window->id;

renderer->driverdata = data;

renderer->info.flags =

if (GL_LoadFunctions(data) < 0) {

GL_DestroyRenderer(renderer);

return NULL;

}

data->context = SDL_GL_CreateContext(window->id);

if (!data->context) {

GL_DestroyRenderer(renderer);

return NULL;

}

if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {

GL_DestroyRenderer(renderer);

return NULL;

}

#ifdef __MACOSX__

/* Enable multi-threaded rendering */

/* Disabled until Ryan finishes his VBO/PBO code...

CGLEnable(CGLGetCurrentContext(), kCGLCEMPEngine);

*/

#endif

SDL_GL_SetSwapInterval(1);

} else {

SDL_GL_SetSwapInterval(0);

}

if (SDL_GL_GetSwapInterval() > 0) {

}

if (SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &doublebuffer) == 0) {

if (!doublebuffer) {

renderer->info.flags |= SDL_RENDERER_SINGLEBUFFER;

}

}

data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);

renderer->info.max_texture_width = value;

data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);

renderer->info.max_texture_height = value;

if (SDL_GL_ExtensionSupported("GL_ARB_texture_rectangle")

|| SDL_GL_ExtensionSupported("GL_EXT_texture_rectangle")) {

data->GL_ARB_texture_rectangle_supported = SDL_TRUE;

}

if (SDL_GL_ExtensionSupported("GL_EXT_paletted_texture")) {

data->GL_EXT_paletted_texture_supported = SDL_TRUE;

data->glColorTableEXT =

(PFNGLCOLORTABLEEXTPROC) SDL_GL_GetProcAddress("glColorTableEXT");

} else {

/* Don't advertise support for 8-bit indexed texture format */

Uint32 i, j;

SDL_RendererInfo *info = &renderer->info;

for (i = 0, j = 0; i < info->num_texture_formats; ++i) {

if (info->texture_formats[i] != SDL_PIXELFORMAT_INDEX8) {

info->texture_formats[j++] = info->texture_formats[i];

}

}

--info->num_texture_formats;

}

if (SDL_GL_ExtensionSupported("GL_APPLE_texture_range")) {

data->glTextureRangeAPPLE =

(void (*)(GLenum, GLsizei, const GLvoid *))

SDL_GL_GetProcAddress("glTextureRangeAPPLE");

}

/* we might use fragment programs for YUV data, etc. */

if (SDL_GL_ExtensionSupported("GL_ARB_fragment_program")) {

/* !!! FIXME: this doesn't check for errors. */

/* !!! FIXME: this should really reuse the glfuncs.h stuff. */

data->glGetProgramivARB = (PFNGLGETPROGRAMIVARBPROC)

SDL_GL_GetProcAddress("glGetProgramivARB");

data->glGetProgramStringARB = (PFNGLGETPROGRAMSTRINGARBPROC)

SDL_GL_GetProcAddress("glGetProgramStringARB");

data->glProgramLocalParameter4fvARB =

(PFNGLPROGRAMLOCALPARAMETER4FVARBPROC)

SDL_GL_GetProcAddress("glProgramLocalParameter4fvARB");

data->glDeleteProgramsARB = (PFNGLDELETEPROGRAMSARBPROC)

SDL_GL_GetProcAddress("glDeleteProgramsARB");

data->glGenProgramsARB = (PFNGLGENPROGRAMSARBPROC)

SDL_GL_GetProcAddress("glGenProgramsARB");

data->glBindProgramARB = (PFNGLBINDPROGRAMARBPROC)

SDL_GL_GetProcAddress("glBindProgramARB");

data->glProgramStringARB = (PFNGLPROGRAMSTRINGARBPROC)

SDL_GL_GetProcAddress("glProgramStringARB");

data->GL_ARB_fragment_program_supported = SDL_TRUE;

}

data->blendMode = -1;

data->scaleMode = -1;

data->glDisable(GL_DEPTH_TEST);

data->glDisable(GL_CULL_FACE);

return renderer;

}

static int

GL_ActivateRenderer(SDL_Renderer * renderer)

{

GL_RenderData *data = (GL_RenderData *) renderer->driverdata;

SDL_Window *window = SDL_GetWindowFromID(renderer->window);

if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {

return -1;

}

data->glMatrixMode(GL_PROJECTION);

data->glLoadIdentity();

data->glMatrixMode(GL_MODELVIEW);

data->glLoadIdentity();

data->glViewport(0, 0, window->w, window->h);

data->glOrtho(0.0, (GLdouble) window->w, (GLdouble) window->h, 0.0,

0.0, 1.0);

data->updateSize = SDL_FALSE;

}

return 0;

}

static int

GL_DisplayModeChanged(SDL_Renderer * renderer)

{

GL_RenderData *data = (GL_RenderData *) renderer->driverdata;

/* Rebind the context to the window area and update matrices */

data->updateSize = SDL_TRUE;

return GL_ActivateRenderer(renderer);

}

static __inline__ int

power_of_2(int input)

{

int value = 1;

while (value < input) {

value <<= 1;

}

return value;

}

#define DEBUG_PROGRAM_COMPILE 1

static GLuint

compile_shader(GL_RenderData *data, GLenum shader_type, const char *source)

{

#if DEBUG_PROGRAM_COMPILE

printf("compiling shader:\n%s\n\n", source);

#endif

GLuint program = 0;

data->glGetError(); /* flush any existing error state. */

data->glGenProgramsARB(1, &program);

data->glBindProgramARB(shader_type, program);

data->glProgramStringARB(shader_type, GL_PROGRAM_FORMAT_ASCII_ARB,

SDL_strlen(source), source);

if (data->glGetError() == GL_INVALID_OPERATION)

{

#if DEBUG_PROGRAM_COMPILE

GLint pos = 0;

const GLubyte *errstr;

data->glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &pos);

errstr = data->glGetString(GL_PROGRAM_ERROR_STRING_ARB);

printf("program compile error at position %d: %s\n\n",

(int) pos, (const char *) errstr);

#endif

data->glBindProgramARB(shader_type, 0);

data->glDeleteProgramsARB(1, &program);

return 0;

} // if

return program;

}

// UYVY to RGB equasion...

// R = 1.164(Y-16) + 1.596(Cr-128)

// G = 1.164(Y-16) - 0.813(Cr-128) - 0.391(Cb-128)

// B = 1.164(Y-16) + 2.018(Cb-128)

// Byte layout is Cb, Y1, Cr, Y2.

// 4 bytes == 2 pixels: Y1/Cb/Cr, Y2/Cb/Cr

// !!! FIXME: this ignores blendmodes, etc.

// !!! FIXME: this could be more efficient...use a dot product for green, not convert to 255.0 range, etc.

static const char *fragment_program_UYVY_source_code =

"!!ARBfp1.0\n"

// outputs...

"OUTPUT outcolor = result.color;\n"

// scratch registers...

"TEMP uyvy;\n"

"TEMP luminance;\n"

"TEMP work;\n"

// We need 32 bits to store the data, but each pixel is 16 bits in itself.

// halve the coordinates to grab the correct 32 bits for the fragment.

"MUL work, fragment.texcoord, { 0.5, 1.0, 1.0, 1.0 };\n"

// Sample the YUV texture. Cb, Y1, Cr, Y2, are stored in r,g,b,a.

// !!! FIXME: "RECT" needs to be "2D" if we're not using texture_rectangle extension. :/

"TEX uyvy, work, texture[0], RECT;\n"

// Scale from 0.0/1.0 to 0.0/255.0 and do subtractions. (!!! FIXME: optimize!)

"MUL uyvy, uyvy, { 255.0, 255.0, 255.0, 255.0 };\n"

"SUB uyvy, uyvy, { 128.0, 16.0, 128.0, 16.0 };\n"

// Choose the luminance component by texcoord.

// !!! FIXME: laziness wins out for now... just average Y1 and Y2.

"ADD luminance, uyvy.yyyy, uyvy.wwww;\n"

"MUL luminance, luminance, { 0.5, 0.5, 0.5, 0.5 };\n"

// Multiply luminance by its magic value.

"MUL luminance, luminance, { 1.164, 1.164, 1.164, 1.164 };\n"

// uyvy.xyzw becomes Cr/Cr/Cb/Cb, with multiplications.

"MUL uyvy, uyvy.zzxx, { 1.596, -0.813, 2.018, -0.391 };\n"

// Add luminance Cr and Cb, store to RGB channels.

"ADD work.rgb, luminance, uyvy;\n"

// Do final addition for Green channel. (!!! FIXME: this should be a DPH?)

"ADD work.g, work.g, uyvy.w;\n"

// Scale back to 0.0/1.0. (this number is 1.0/255.0).

"MUL work, work, { 0.0039215686274509803, 0.0039215686274509803, 0.0039215686274509803, 0.0039215686274509803 };\n"

// Make sure alpha channel is fully opaque. (!!! FIXME: blend modes!)

"MOV work.a, { 1.0 };\n"

// Store out the final fragment color.

"MOV outcolor, work;\n"

// ...and we're done.

"END\n";

static int

GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)

{

GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;

SDL_Window *window = SDL_GetWindowFromID(renderer->window);

GL_TextureData *data;

GLint internalFormat;

GLenum format, type;

switch (texture->format) {

case SDL_PIXELFORMAT_INDEX1LSB:

case SDL_PIXELFORMAT_INDEX1MSB:

internalFormat = GL_RGB;

format = GL_COLOR_INDEX;

type = GL_BITMAP;

break;

if (!renderdata->GL_EXT_paletted_texture_supported) {

SDL_SetError("Unsupported texture format");

return -1;

}

internalFormat = GL_COLOR_INDEX8_EXT;

format = GL_COLOR_INDEX;

type = GL_UNSIGNED_BYTE;

break;

internalFormat = GL_R3_G3_B2;

format = GL_RGB;

type = GL_UNSIGNED_BYTE_3_3_2;

break;

internalFormat = GL_RGB4;

format = GL_RGB;

type = GL_UNSIGNED_SHORT_4_4_4_4;

break;

internalFormat = GL_RGB5;

format = GL_RGB;

type = GL_UNSIGNED_SHORT_5_5_5_1;

break;

internalFormat = GL_RGBA4;

format = GL_BGRA;

type = GL_UNSIGNED_SHORT_4_4_4_4_REV;

break;

internalFormat = GL_RGB5_A1;

format = GL_BGRA;

type = GL_UNSIGNED_SHORT_1_5_5_5_REV;

break;

internalFormat = GL_RGB8;

format = GL_RGB;

type = GL_UNSIGNED_SHORT_5_6_5;

break;

internalFormat = GL_RGB8;

format = GL_RGB;

type = GL_UNSIGNED_BYTE;

break;

format = GL_BGRA;

type = GL_UNSIGNED_BYTE;

internalFormat = GL_RGB8;

format = GL_BGR;

type = GL_UNSIGNED_BYTE;

break;

format = GL_RGBA;

type = GL_UNSIGNED_BYTE;

#ifdef __MACOSX__

internalFormat = GL_RGBA;

format = GL_BGRA;

type = GL_UNSIGNED_INT_8_8_8_8_REV;

#else

internalFormat = GL_RGBA8;

format = GL_BGRA;

internalFormat = GL_RGBA8;

format = GL_RGBA;

internalFormat = GL_RGB10_A2;

format = GL_BGRA;

type = GL_UNSIGNED_INT_2_10_10_10_REV;

break;

#if 0 /* Ryan's pixel shader code should be better, once it works. :) */

case SDL_PIXELFORMAT_UYVY:

// if (renderdata->GL_MESA_ycbcr_texture) {

// internalFormat = 3;

// format = GL_YCBCR_MESA;

// type = GL_UNSIGNED_SHORT_8_8_MESA;

// } else if (renderdata->GL_APPLE_ycbcr_422) {

internalFormat = GL_RGB;

format = GL_YCBCR_422_APPLE;

#if SDL_BYTEORDER == SDL_LIL_ENDIAN

type = GL_UNSIGNED_SHORT_8_8_APPLE;

#else

type = GL_UNSIGNED_SHORT_8_8_REV_APPLE;

#endif

// } else {

// SDL_SetError("Unsupported texture format");

// return -1;

// }

break;

#else

case SDL_PIXELFORMAT_UYVY:

if (renderdata->GL_ARB_fragment_program_supported) {

if (renderdata->fragment_program_UYVY == 0) {

renderdata->fragment_program_UYVY =

compile_shader(renderdata, GL_FRAGMENT_PROGRAM_ARB,

fragment_program_UYVY_source_code);

if (renderdata->fragment_program_UYVY == 0) {

SDL_SetError("Fragment program compile error");

return -1;

}

}

shader = renderdata->fragment_program_UYVY;

internalFormat = GL_RGBA;

format = GL_RGBA;

type = GL_UNSIGNED_BYTE;

} else {

SDL_SetError("Unsupported texture format");

return -1;

}

break;

default:

SDL_SetError("Unsupported texture format");

return -1;

}

if (!data) {

SDL_OutOfMemory();

return -1;

}

data->shader = shader;

if (texture->format == SDL_PIXELFORMAT_INDEX8) {

data->palette = (Uint8 *) SDL_malloc(3 * 256 * sizeof(Uint8));

if (!data->palette) {

SDL_OutOfMemory();

SDL_free(data);

return -1;

}

SDL_memset(data->palette, 0xFF, 3 * 256 * sizeof(Uint8));

}

data->pixels = SDL_malloc(texture->h * data->pitch);

if (!data->pixels) {

SDL_OutOfMemory();

SDL_free(data);

return -1;

}

}

texture->driverdata = data;

renderdata->glGetError();

renderdata->glGenTextures(1, &data->texture);

if (renderdata->GL_ARB_texture_rectangle_supported) {

data->type = GL_TEXTURE_RECTANGLE_ARB;

texture_w = texture->w;

texture_h = texture->h;

data->texw = (GLfloat) texture_w;

data->texh = (GLfloat) texture_h;

} else {

data->type = GL_TEXTURE_2D;

texture_w = power_of_2(texture->w);

texture_h = power_of_2(texture->h);

data->texh = (GLfloat) texture->h / texture_h;

}

/* YUV formats use RGBA but are really two bytes per pixel */

if (internalFormat == GL_RGBA && bytes_per_pixel(texture->format) < 4) {

data->HACK_RYAN_FIXME = 2;

} else {

data->HACK_RYAN_FIXME = 1;

data->format = format;

data->formattype = type;

renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,

GL_NEAREST);

renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,

GL_NEAREST);

renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,

GL_CLAMP_TO_EDGE);

renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,

GL_CLAMP_TO_EDGE);

#ifndef GL_TEXTURE_STORAGE_HINT_APPLE

#define GL_TEXTURE_STORAGE_HINT_APPLE 0x85BC

#endif

#ifndef STORAGE_CACHED_APPLE

#define STORAGE_CACHED_APPLE 0x85BE

#endif

#ifndef STORAGE_SHARED_APPLE

#define STORAGE_SHARED_APPLE 0x85BF

#endif

if (texture->access == SDL_TEXTUREACCESS_STREAMING) {

renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,

GL_STORAGE_SHARED_APPLE);