SDL_render_gl.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_RENDER_OGL && !SDL_RENDER_DISABLED
#include "SDL_hints.h"
#include "SDL_log.h"
#include "SDL_assert.h"
#include "SDL_opengl.h"
#include "../SDL_sysrender.h"
#include "SDL_shaders_gl.h"
#ifdef __MACOSX__
#include <OpenGL/OpenGL.h>
#endif
/* To prevent unnecessary window recreation,
* these should match the defaults selected in SDL_GL_ResetAttributes
*/
#define RENDERER_CONTEXT_MAJOR 2
#define RENDERER_CONTEXT_MINOR 1
/* OpenGL renderer implementation */
/* Details on optimizing the texture path on Mac OS X:
http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_texturedata/opengl_texturedata.html
*/
/* Used to re-create the window with OpenGL capability */
extern int SDL_RecreateWindow(SDL_Window * window, Uint32 flags);
static const float inv255f = 1.0f / 255.0f;
static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags);
static void GL_WindowEvent(SDL_Renderer * renderer,
const SDL_WindowEvent *event);
static int GL_GetOutputSize(SDL_Renderer * renderer, int *w, int *h);
static int GL_CreateTexture(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_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *Uplane, int Upitch,
const Uint8 *Vplane, int Vpitch);
static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, void **pixels, int *pitch);
static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int GL_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture);
static int GL_UpdateViewport(SDL_Renderer * renderer);
static int GL_UpdateClipRect(SDL_Renderer * renderer);
static int GL_RenderClear(SDL_Renderer * renderer);
static int GL_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_FPoint * points, int count);
static int GL_RenderDrawLines(SDL_Renderer * renderer,
const SDL_FPoint * points, int count);
static int GL_RenderFillRects(SDL_Renderer * renderer,
const SDL_FRect * rects, int count);
static int GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect);
static int GL_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect,
const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip);
static int GL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch);
static void GL_RenderPresent(SDL_Renderer * renderer);
static void GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void GL_DestroyRenderer(SDL_Renderer * renderer);
static int GL_BindTexture (SDL_Renderer * renderer, SDL_Texture *texture, float *texw, float *texh);
static int GL_UnbindTexture (SDL_Renderer * renderer, SDL_Texture *texture);
SDL_RenderDriver GL_RenderDriver = {
GL_CreateRenderer,
{
"opengl",
(SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_TARGETTEXTURE),
1,
{SDL_PIXELFORMAT_ARGB8888},
0,
0}
};
typedef struct GL_FBOList GL_FBOList;
struct GL_FBOList
{
Uint32 w, h;
GLuint FBO;
GL_FBOList *next;
};
typedef struct
{
SDL_GLContext context;
SDL_bool debug_enabled;
SDL_bool GL_ARB_debug_output_supported;
int errors;
char **error_messages;
GLDEBUGPROCARB next_error_callback;
GLvoid *next_error_userparam;
SDL_bool GL_ARB_texture_non_power_of_two_supported;
SDL_bool GL_ARB_texture_rectangle_supported;
struct {
GL_Shader shader;
Uint32 color;
int blendMode;
} current;
SDL_bool GL_EXT_framebuffer_object_supported;
GL_FBOList *framebuffers;
/* OpenGL functions */
#define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
#include "SDL_glfuncs.h"
#undef SDL_PROC
/* Multitexture support */
SDL_bool GL_ARB_multitexture_supported;
PFNGLACTIVETEXTUREARBPROC glActiveTextureARB;
GLint num_texture_units;
PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT;
PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT;
PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT;
PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT;
PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT;
/* Shader support */
GL_ShaderContext *shaders;
} GL_RenderData;
typedef struct
{
GLuint texture;
GLenum type;
GLfloat texw;
GLfloat texh;
GLenum format;
GLenum formattype;
void *pixels;
int pitch;
SDL_Rect locked_rect;
/* YUV texture support */
SDL_bool yuv;
SDL_bool nv12;
GLuint utexture;
GLuint vtexture;
GL_FBOList *fbo;
} GL_TextureData;
SDL_FORCE_INLINE const char*
GL_TranslateError (GLenum error)
{
#define GL_ERROR_TRANSLATE(e) case e: return #e;
switch (error) {
GL_ERROR_TRANSLATE(GL_INVALID_ENUM)
GL_ERROR_TRANSLATE(GL_INVALID_VALUE)
GL_ERROR_TRANSLATE(GL_INVALID_OPERATION)
GL_ERROR_TRANSLATE(GL_OUT_OF_MEMORY)
GL_ERROR_TRANSLATE(GL_NO_ERROR)
GL_ERROR_TRANSLATE(GL_STACK_OVERFLOW)
GL_ERROR_TRANSLATE(GL_STACK_UNDERFLOW)
GL_ERROR_TRANSLATE(GL_TABLE_TOO_LARGE)
default:
return "UNKNOWN";
}
#undef GL_ERROR_TRANSLATE
}
SDL_FORCE_INLINE void
GL_ClearErrors(SDL_Renderer *renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (!data->debug_enabled)
{
return;
}
if (data->GL_ARB_debug_output_supported) {
if (data->errors) {
int i;
for (i = 0; i < data->errors; ++i) {
SDL_free(data->error_messages[i]);
}
SDL_free(data->error_messages);
data->errors = 0;
data->error_messages = NULL;
}
} else {
while (data->glGetError() != GL_NO_ERROR) {
continue;
}
}
}
SDL_FORCE_INLINE int
GL_CheckAllErrors (const char *prefix, SDL_Renderer *renderer, const char *file, int line, const char *function)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
int ret = 0;
if (!data->debug_enabled)
{
return 0;
}
if (data->GL_ARB_debug_output_supported) {
if (data->errors) {
int i;
for (i = 0; i < data->errors; ++i) {
SDL_SetError("%s: %s (%d): %s %s", prefix, file, line, function, data->error_messages[i]);
ret = -1;
}
GL_ClearErrors(renderer);
}
} else {
/* check gl errors (can return multiple errors) */
for (;;) {
GLenum error = data->glGetError();
if (error != GL_NO_ERROR) {
if (prefix == NULL || prefix[0] == '\0') {
prefix = "generic";
}
SDL_SetError("%s: %s (%d): %s %s (0x%X)", prefix, file, line, function, GL_TranslateError(error), error);
ret = -1;
} else {
break;
}
}
}
return ret;
}
#if 0
#define GL_CheckError(prefix, renderer)
#elif defined(_MSC_VER)
#define GL_CheckError(prefix, renderer) GL_CheckAllErrors(prefix, renderer, __FILE__, __LINE__, __FUNCTION__)
#else
#define GL_CheckError(prefix, renderer) GL_CheckAllErrors(prefix, renderer, __FILE__, __LINE__, __PRETTY_FUNCTION__)
#endif
static int
GL_LoadFunctions(GL_RenderData * data)
{
#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 ) { \
return SDL_SetError("Couldn't load GL function %s: %s\n", #func, SDL_GetError()); \
} \
} while ( 0 );
#endif /* __SDL_NOGETPROCADDR__ */
#include "SDL_glfuncs.h"
#undef SDL_PROC
return 0;
}
static SDL_GLContext SDL_CurrentContext = NULL;
static int
GL_ActivateRenderer(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (SDL_CurrentContext != data->context ||
SDL_GL_GetCurrentContext() != data->context) {
if (SDL_GL_MakeCurrent(renderer->window, data->context) < 0) {
return -1;
}
SDL_CurrentContext = data->context;
GL_UpdateViewport(renderer);
}
GL_ClearErrors(renderer);
return 0;
}
/* This is called if we need to invalidate all of the SDL OpenGL state */
static void
GL_ResetState(SDL_Renderer *renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (SDL_GL_GetCurrentContext() == data->context) {
GL_UpdateViewport(renderer);
} else {
GL_ActivateRenderer(renderer);
}
data->current.shader = SHADER_NONE;
data->current.color = 0;
data->current.blendMode = -1;
data->glDisable(GL_DEPTH_TEST);
data->glDisable(GL_CULL_FACE);
/* This ended up causing video discrepancies between OpenGL and Direct3D */
/* data->glEnable(GL_LINE_SMOOTH); */
data->glMatrixMode(GL_MODELVIEW);
data->glLoadIdentity();
GL_CheckError("", renderer);
}
static void APIENTRY
GL_HandleDebugMessage(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const char *message, const void *userParam)
{
SDL_Renderer *renderer = (SDL_Renderer *) userParam;
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (type == GL_DEBUG_TYPE_ERROR_ARB) {
/* Record this error */
int errors = data->errors + 1;
char **error_messages = SDL_realloc(data->error_messages, errors * sizeof(*data->error_messages));
if (error_messages) {
data->errors = errors;
data->error_messages = error_messages;
data->error_messages[data->errors-1] = SDL_strdup(message);
}
}
/* If there's another error callback, pass it along, otherwise log it */
if (data->next_error_callback) {
data->next_error_callback(source, type, id, severity, length, message, data->next_error_userparam);
} else {
if (type == GL_DEBUG_TYPE_ERROR_ARB) {
SDL_LogError(SDL_LOG_CATEGORY_RENDER, "%s", message);
} else {
SDL_LogDebug(SDL_LOG_CATEGORY_RENDER, "%s", message);
}
}
}
static GL_FBOList *
GL_GetFBO(GL_RenderData *data, Uint32 w, Uint32 h)
{
GL_FBOList *result = data->framebuffers;
while (result && ((result->w != w) || (result->h != h))) {
result = result->next;
}
if (!result) {
result = SDL_malloc(sizeof(GL_FBOList));
if (result) {
result->w = w;
result->h = h;
data->glGenFramebuffersEXT(1, &result->FBO);
result->next = data->framebuffers;
data->framebuffers = result;
}
}
return result;
}
SDL_Renderer *
GL_CreateRenderer(SDL_Window * window, Uint32 flags)
{
SDL_Renderer *renderer;
GL_RenderData *data;
const char *hint;
GLint value;
Uint32 window_flags;
int profile_mask = 0, major = 0, minor = 0;
SDL_bool changed_window = SDL_FALSE;
SDL_GL_GetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, &profile_mask);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, &major);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, &minor);
window_flags = SDL_GetWindowFlags(window);
if (!(window_flags & SDL_WINDOW_OPENGL) ||
profile_mask == SDL_GL_CONTEXT_PROFILE_ES || major != RENDERER_CONTEXT_MAJOR || minor != RENDERER_CONTEXT_MINOR) {
changed_window = SDL_TRUE;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, RENDERER_CONTEXT_MAJOR);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, RENDERER_CONTEXT_MINOR);
if (SDL_RecreateWindow(window, window_flags | SDL_WINDOW_OPENGL) < 0) {
goto error;
}
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
goto error;
}
data = (GL_RenderData *) SDL_calloc(1, sizeof(*data));
if (!data) {
GL_DestroyRenderer(renderer);
SDL_OutOfMemory();
goto error;
}
renderer->WindowEvent = GL_WindowEvent;
renderer->GetOutputSize = GL_GetOutputSize;
renderer->CreateTexture = GL_CreateTexture;
renderer->UpdateTexture = GL_UpdateTexture;
renderer->UpdateTextureYUV = GL_UpdateTextureYUV;
renderer->LockTexture = GL_LockTexture;
renderer->UnlockTexture = GL_UnlockTexture;
renderer->SetRenderTarget = GL_SetRenderTarget;
renderer->UpdateViewport = GL_UpdateViewport;
renderer->UpdateClipRect = GL_UpdateClipRect;
renderer->RenderClear = GL_RenderClear;
renderer->RenderDrawPoints = GL_RenderDrawPoints;
renderer->RenderDrawLines = GL_RenderDrawLines;
renderer->RenderFillRects = GL_RenderFillRects;
renderer->RenderCopy = GL_RenderCopy;
renderer->RenderCopyEx = GL_RenderCopyEx;
renderer->RenderReadPixels = GL_RenderReadPixels;
renderer->RenderPresent = GL_RenderPresent;
renderer->DestroyTexture = GL_DestroyTexture;
renderer->DestroyRenderer = GL_DestroyRenderer;
renderer->GL_BindTexture = GL_BindTexture;
renderer->GL_UnbindTexture = GL_UnbindTexture;
renderer->info = GL_RenderDriver.info;
renderer->info.flags = (SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE);
renderer->driverdata = data;
renderer->window = window;
data->context = SDL_GL_CreateContext(window);
if (!data->context) {
GL_DestroyRenderer(renderer);
goto error;
}
if (SDL_GL_MakeCurrent(window, data->context) < 0) {
GL_DestroyRenderer(renderer);
goto error;
}
if (GL_LoadFunctions(data) < 0) {
GL_DestroyRenderer(renderer);
goto error;
}
#ifdef __MACOSX__
/* Enable multi-threaded rendering */
/* Disabled until Ryan finishes his VBO/PBO code...
CGLEnable(CGLGetCurrentContext(), kCGLCEMPEngine);
*/
#endif
if (flags & SDL_RENDERER_PRESENTVSYNC) {
SDL_GL_SetSwapInterval(1);
} else {
SDL_GL_SetSwapInterval(0);
}
if (SDL_GL_GetSwapInterval() > 0) {
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
}
/* Check for debug output support */
if (SDL_GL_GetAttribute(SDL_GL_CONTEXT_FLAGS, &value) == 0 &&
(value & SDL_GL_CONTEXT_DEBUG_FLAG)) {
data->debug_enabled = SDL_TRUE;
}
if (data->debug_enabled && SDL_GL_ExtensionSupported("GL_ARB_debug_output")) {
PFNGLDEBUGMESSAGECALLBACKARBPROC glDebugMessageCallbackARBFunc = (PFNGLDEBUGMESSAGECALLBACKARBPROC) SDL_GL_GetProcAddress("glDebugMessageCallbackARB");
data->GL_ARB_debug_output_supported = SDL_TRUE;
data->glGetPointerv(GL_DEBUG_CALLBACK_FUNCTION_ARB, (GLvoid **)&data->next_error_callback);
data->glGetPointerv(GL_DEBUG_CALLBACK_USER_PARAM_ARB, &data->next_error_userparam);
glDebugMessageCallbackARBFunc(GL_HandleDebugMessage, renderer);
/* Make sure our callback is called when errors actually happen */
data->glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
}
if (SDL_GL_ExtensionSupported("GL_ARB_texture_non_power_of_two")) {
data->GL_ARB_texture_non_power_of_two_supported = SDL_TRUE;
} else if (SDL_GL_ExtensionSupported("GL_ARB_texture_rectangle") ||
SDL_GL_ExtensionSupported("GL_EXT_texture_rectangle")) {
data->GL_ARB_texture_rectangle_supported = SDL_TRUE;
}
if (data->GL_ARB_texture_rectangle_supported) {
data->glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB, &value);
renderer->info.max_texture_width = value;
renderer->info.max_texture_height = value;
} else {
data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
renderer->info.max_texture_width = value;
renderer->info.max_texture_height = value;
}
/* Check for multitexture support */
if (SDL_GL_ExtensionSupported("GL_ARB_multitexture")) {
data->glActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC) SDL_GL_GetProcAddress("glActiveTextureARB");
if (data->glActiveTextureARB) {
data->GL_ARB_multitexture_supported = SDL_TRUE;
data->glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &data->num_texture_units);
}
}
/* Check for shader support */
hint = SDL_GetHint(SDL_HINT_RENDER_OPENGL_SHADERS);
if (!hint || *hint != '0') {
data->shaders = GL_CreateShaderContext();
}
SDL_LogInfo(SDL_LOG_CATEGORY_RENDER, "OpenGL shaders: %s",
data->shaders ? "ENABLED" : "DISABLED");
/* We support YV12 textures using 3 textures and a shader */
if (data->shaders && data->num_texture_units >= 3) {
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_YV12;
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_IYUV;
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_NV12;
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_NV21;
}
#ifdef __MACOSX__
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_UYVY;
#endif
if (SDL_GL_ExtensionSupported("GL_EXT_framebuffer_object")) {
data->GL_EXT_framebuffer_object_supported = SDL_TRUE;
data->glGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC)
SDL_GL_GetProcAddress("glGenFramebuffersEXT");
data->glDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC)
SDL_GL_GetProcAddress("glDeleteFramebuffersEXT");
data->glFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)
SDL_GL_GetProcAddress("glFramebufferTexture2DEXT");
data->glBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC)
SDL_GL_GetProcAddress("glBindFramebufferEXT");
data->glCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)
SDL_GL_GetProcAddress("glCheckFramebufferStatusEXT");
renderer->info.flags |= SDL_RENDERER_TARGETTEXTURE;
}
data->framebuffers = NULL;
/* Set up parameters for rendering */
GL_ResetState(renderer);
return renderer;
error:
if (changed_window) {
/* Uh oh, better try to put it back... */
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, profile_mask);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, major);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, minor);
SDL_RecreateWindow(window, window_flags);
}
return NULL;
}
static void
GL_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
{
if (event->event == SDL_WINDOWEVENT_SIZE_CHANGED ||
event->event == SDL_WINDOWEVENT_SHOWN ||
event->event == SDL_WINDOWEVENT_HIDDEN) {
/* Rebind the context to the window area and update matrices */
SDL_CurrentContext = NULL;
}
}
static int
GL_GetOutputSize(SDL_Renderer * renderer, int *w, int *h)
{
SDL_GL_GetDrawableSize(renderer->window, w, h);
return 0;
}
SDL_FORCE_INLINE int
power_of_2(int input)
{
int value = 1;
while (value < input) {
value <<= 1;
}
return value;
}
SDL_FORCE_INLINE SDL_bool
convert_format(GL_RenderData *renderdata, Uint32 pixel_format,
GLint* internalFormat, GLenum* format, GLenum* type)
{
switch (pixel_format) {
case SDL_PIXELFORMAT_ARGB8888:
*internalFormat = GL_RGBA8;
*format = GL_BGRA;
*type = GL_UNSIGNED_INT_8_8_8_8_REV;
break;
case SDL_PIXELFORMAT_YV12:
case SDL_PIXELFORMAT_IYUV:
case SDL_PIXELFORMAT_NV12:
case SDL_PIXELFORMAT_NV21:
*internalFormat = GL_LUMINANCE;
*format = GL_LUMINANCE;
*type = GL_UNSIGNED_BYTE;
break;
#ifdef __MACOSX__
case SDL_PIXELFORMAT_UYVY:
*internalFormat = GL_RGB8;
*format = GL_YCBCR_422_APPLE;
*type = GL_UNSIGNED_SHORT_8_8_APPLE;
break;
#endif
default:
return SDL_FALSE;
}
return SDL_TRUE;
}
static GLenum
GetScaleQuality(void)
{
const char *hint = SDL_GetHint(SDL_HINT_RENDER_SCALE_QUALITY);
if (!hint || *hint == '0' || SDL_strcasecmp(hint, "nearest") == 0) {
return GL_NEAREST;
} else {
return GL_LINEAR;
}
}
static int
GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data;
GLint internalFormat;
GLenum format, type;
int texture_w, texture_h;
GLenum scaleMode;
GL_ActivateRenderer(renderer);
if (!convert_format(renderdata, texture->format, &internalFormat,
&format, &type)) {
return SDL_SetError("Texture format %s not supported by OpenGL",
SDL_GetPixelFormatName(texture->format));
}
data = (GL_TextureData *) SDL_calloc(1, sizeof(*data));
if (!data) {
return SDL_OutOfMemory();
}
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
size_t size;
data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
size = texture->h * data->pitch;
if (texture->format == SDL_PIXELFORMAT_YV12 ||
texture->format == SDL_PIXELFORMAT_IYUV) {
/* Need to add size for the U and V planes */
size += (2 * (texture->h * data->pitch) / 4);
}
if (texture->format == SDL_PIXELFORMAT_NV12 ||
texture->format == SDL_PIXELFORMAT_NV21) {
/* Need to add size for the U/V plane */
size += ((texture->h * data->pitch) / 2);
}
data->pixels = SDL_calloc(1, size);
if (!data->pixels) {
SDL_free(data);
return SDL_OutOfMemory();
}
}
if (texture->access == SDL_TEXTUREACCESS_TARGET) {
data->fbo = GL_GetFBO(renderdata, texture->w, texture->h);
} else {
data->fbo = NULL;
}
GL_CheckError("", renderer);
renderdata->glGenTextures(1, &data->texture);
if (GL_CheckError("glGenTextures()", renderer) < 0) {
if (data->pixels) {
SDL_free(data->pixels);
}
SDL_free(data);
return -1;
}
texture->driverdata = data;
if (renderdata->GL_ARB_texture_non_power_of_two_supported) {
data->type = GL_TEXTURE_2D;
texture_w = texture->w;
texture_h = texture->h;
data->texw = 1.0f;
data->texh = 1.0f;
} else 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->texw = (GLfloat) (texture->w) / texture_w;
data->texh = (GLfloat) texture->h / texture_h;
}
data->format = format;
data->formattype = type;
scaleMode = GetScaleQuality();
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->texture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER, scaleMode);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER, scaleMode);
/* According to the spec, CLAMP_TO_EDGE is the default for TEXTURE_RECTANGLE
and setting it causes an INVALID_ENUM error in the latest NVidia drivers.
*/
if (data->type != GL_TEXTURE_RECTANGLE_ARB) {
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
}
#ifdef __MACOSX__
#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);
} else {
renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,
GL_STORAGE_CACHED_APPLE);
}
if (texture->access == SDL_TEXTUREACCESS_STREAMING
&& texture->format == SDL_PIXELFORMAT_ARGB8888
&& (texture->w % 8) == 0) {
renderdata->glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH,
(data->pitch / SDL_BYTESPERPIXEL(texture->format)));
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, data->pixels);
renderdata->glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
}
else
#endif
{
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, NULL);
}
renderdata->glDisable(data->type);
if (GL_CheckError("glTexImage2D()", renderer) < 0) {
return -1;
}
if (texture->format == SDL_PIXELFORMAT_YV12 ||
texture->format == SDL_PIXELFORMAT_IYUV) {
data->yuv = SDL_TRUE;
renderdata->glGenTextures(1, &data->utexture);
renderdata->glGenTextures(1, &data->vtexture);
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->utexture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
scaleMode);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
scaleMode);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w/2,
texture_h/2, 0, format, type, NULL);
renderdata->glBindTexture(data->type, data->vtexture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
scaleMode);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
scaleMode);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w/2,
texture_h/2, 0, format, type, NULL);
renderdata->glDisable(data->type);
}
if (texture->format == SDL_PIXELFORMAT_NV12 ||
texture->format == SDL_PIXELFORMAT_NV21) {
data->nv12 = SDL_TRUE;
renderdata->glGenTextures(1, &data->utexture);
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->utexture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
scaleMode);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
scaleMode);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
renderdata->glTexImage2D(data->type, 0, GL_LUMINANCE_ALPHA, texture_w/2,
texture_h/2, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, NULL);
renderdata->glDisable(data->type);
}
return GL_CheckError("", renderer);
}
static int
GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
const int texturebpp = SDL_BYTESPERPIXEL(texture->format);
SDL_assert(texturebpp != 0); /* otherwise, division by zero later. */
GL_ActivateRenderer(renderer);
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->texture);
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, (pitch / texturebpp));
renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
rect->h, data->format, data->formattype,
pixels);
if (data->yuv) {
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, (pitch / 2));
/* Skip to the correct offset into the next texture */
pixels = (const void*)((const Uint8*)pixels + rect->h * pitch);
if (texture->format == SDL_PIXELFORMAT_YV12) {
renderdata->glBindTexture(data->type, data->vtexture);
} else {
renderdata->glBindTexture(data->type, data->utexture);
}
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, pixels);
/* Skip to the correct offset into the next texture */
pixels = (const void*)((const Uint8*)pixels + (rect->h * pitch)/4);
if (texture->format == SDL_PIXELFORMAT_YV12) {
renderdata->glBindTexture(data->type, data->utexture);
} else {
renderdata->glBindTexture(data->type, data->vtexture);
}
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, pixels);
}
if (data->nv12) {
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, (pitch / 2));
/* Skip to the correct offset into the next texture */
pixels = (const void*)((const Uint8*)pixels + rect->h * pitch);
renderdata->glBindTexture(data->type, data->utexture);
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, pixels);
}
renderdata->glDisable(data->type);
return GL_CheckError("glTexSubImage2D()", renderer);
}
static int
GL_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *Uplane, int Upitch,
const Uint8 *Vplane, int Vpitch)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
GL_ActivateRenderer(renderer);
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->texture);
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, Ypitch);
renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
rect->h, data->format, data->formattype,
Yplane);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, Upitch);
renderdata->glBindTexture(data->type, data->utexture);
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, Uplane);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, Vpitch);
renderdata->glBindTexture(data->type, data->vtexture);
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, Vplane);
renderdata->glDisable(data->type);
return GL_CheckError("glTexSubImage2D()", renderer);
}
static int
GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, void **pixels, int *pitch)
{
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
data->locked_rect = *rect;
*pixels =
(void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
*pitch = data->pitch;
return 0;
}
static void
GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
const SDL_Rect *rect;
void *pixels;
rect = &data->locked_rect;
pixels =
(void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
GL_UpdateTexture(renderer, texture, rect, pixels, data->pitch);
}
static int
GL_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata;
GLenum status;
GL_ActivateRenderer(renderer);
if (texture == NULL) {
data->glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
return 0;
}
texturedata = (GL_TextureData *) texture->driverdata;
data->glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, texturedata->fbo->FBO);
/* TODO: check if texture pixel format allows this operation */
data->glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, texturedata->type, texturedata->texture, 0);
/* Check FBO status */
status = data->glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
return SDL_SetError("glFramebufferTexture2DEXT() failed");
}
return 0;
}
static int
GL_UpdateViewport(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (SDL_CurrentContext != data->context) {
/* We'll update the viewport after we rebind the context */
return 0;
}
if (renderer->target) {
data->glViewport(renderer->viewport.x, renderer->viewport.y,
renderer->viewport.w, renderer->viewport.h);
} else {
int w, h;
SDL_GetRendererOutputSize(renderer, &w, &h);
data->glViewport(renderer->viewport.x, (h - renderer->viewport.y - renderer->viewport.h),
renderer->viewport.w, renderer->viewport.h);
}
data->glMatrixMode(GL_PROJECTION);
data->glLoadIdentity();
if (renderer->viewport.w && renderer->viewport.h) {
if (renderer->target) {
data->glOrtho((GLdouble) 0,
(GLdouble) renderer->viewport.w,
(GLdouble) 0,
(GLdouble) renderer->viewport.h,
0.0, 1.0);
} else {
data->glOrtho((GLdouble) 0,
(GLdouble) renderer->viewport.w,
(GLdouble) renderer->viewport.h,
(GLdouble) 0,
0.0, 1.0);
}
}
return GL_CheckError("", renderer);
}
static int
GL_UpdateClipRect(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (renderer->clipping_enabled) {
const SDL_Rect *rect = &renderer->clip_rect;
data->glEnable(GL_SCISSOR_TEST);
if (renderer->target) {
data->glScissor(renderer->viewport.x + rect->x, renderer->viewport.y + rect->y, rect->w, rect->h);
} else {
int w, h;
SDL_GetRendererOutputSize(renderer, &w, &h);
data->glScissor(renderer->viewport.x + rect->x, h - renderer->viewport.y - rect->y - rect->h, rect->w, rect->h);
}
} else {
data->glDisable(GL_SCISSOR_TEST);
}
return 0;
}
static void
GL_SetShader(GL_RenderData * data, GL_Shader shader)
{
if (data->shaders && shader != data->current.shader) {
GL_SelectShader(data->shaders, shader);
data->current.shader = shader;
}
}
static void
GL_SetColor(GL_RenderData * data, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
Uint32 color = ((a << 24) | (r << 16) | (g << 8) | b);
if (color != data->current.color) {
data->glColor4f((GLfloat) r * inv255f,
(GLfloat) g * inv255f,
(GLfloat) b * inv255f,
(GLfloat) a * inv255f);
data->current.color = color;
}
}
static void
GL_SetBlendMode(GL_RenderData * data, int blendMode)
{
if (blendMode != data->current.blendMode) {
switch (blendMode) {
case SDL_BLENDMODE_NONE:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
data->glDisable(GL_BLEND);
break;
case SDL_BLENDMODE_BLEND:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
break;
case SDL_BLENDMODE_ADD:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, GL_ZERO, GL_ONE);
break;
case SDL_BLENDMODE_MOD:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFuncSeparate(GL_ZERO, GL_SRC_COLOR, GL_ZERO, GL_ONE);
break;
}
data->current.blendMode = blendMode;
}
}
static void
GL_SetDrawingState(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_ActivateRenderer(renderer);
GL_SetColor(data, renderer->r,
renderer->g,
renderer->b,
renderer->a);
GL_SetBlendMode(data, renderer->blendMode);
GL_SetShader(data, SHADER_SOLID);
}
static int
GL_RenderClear(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_ActivateRenderer(renderer);
data->glClearColor((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
data->glClear(GL_COLOR_BUFFER_BIT);
return 0;
}
static int
GL_RenderDrawPoints(SDL_Renderer * renderer, const SDL_FPoint * points,
int count)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
int i;
GL_SetDrawingState(renderer);
data->glBegin(GL_POINTS);
for (i = 0; i < count; ++i) {
data->glVertex2f(0.5f + points[i].x, 0.5f + points[i].y);
}
data->glEnd();
return 0;
}
static int
GL_RenderDrawLines(SDL_Renderer * renderer, const SDL_FPoint * points,
int count)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
int i;
GL_SetDrawingState(renderer);
if (count > 2 &&
points[0].x == points[count-1].x && points[0].y == points[count-1].y) {
data->glBegin(GL_LINE_LOOP);
/* GL_LINE_LOOP takes care of the final segment */
--count;
for (i = 0; i < count; ++i) {
data->glVertex2f(0.5f + points[i].x, 0.5f + points[i].y);
}
data->glEnd();
} else {
#if defined(__MACOSX__) || defined(__WIN32__)
#else
int x1, y1, x2, y2;
#endif
data->glBegin(GL_LINE_STRIP);
for (i = 0; i < count; ++i) {
data->glVertex2f(0.5f + points[i].x, 0.5f + points[i].y);
}
data->glEnd();
/* The line is half open, so we need one more point to complete it.
* http://www.opengl.org/documentation/specs/version1.1/glspec1.1/node47.html
* If we have to, we can use vertical line and horizontal line textures
* for vertical and horizontal lines, and then create custom textures
* for diagonal lines and software render those. It's terrible, but at
* least it would be pixel perfect.
*/
data->glBegin(GL_POINTS);
#if defined(__MACOSX__) || defined(__WIN32__)
/* Mac OS X and Windows seem to always leave the last point open */
data->glVertex2f(0.5f + points[count-1].x, 0.5f + points[count-1].y);
#else
/* Linux seems to leave the right-most or bottom-most point open */
x1 = points[0].x;
y1 = points[0].y;
x2 = points[count-1].x;
y2 = points[count-1].y;
if (x1 > x2) {
data->glVertex2f(0.5f + x1, 0.5f + y1);
} else if (x2 > x1) {
data->glVertex2f(0.5f + x2, 0.5f + y2);
}
if (y1 > y2) {
data->glVertex2f(0.5f + x1, 0.5f + y1);
} else if (y2 > y1) {
data->glVertex2f(0.5f + x2, 0.5f + y2);
}
#endif
data->glEnd();
}
return GL_CheckError("", renderer);
}
static int
GL_RenderFillRects(SDL_Renderer * renderer, const SDL_FRect * rects, int count)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
int i;
GL_SetDrawingState(renderer);
for (i = 0; i < count; ++i) {
const SDL_FRect *rect = &rects[i];
data->glRectf(rect->x, rect->y, rect->x + rect->w, rect->y + rect->h);
}
return GL_CheckError("", renderer);
}
static int
GL_SetupCopy(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
data->glEnable(texturedata->type);
if (texturedata->yuv) {
data->glActiveTextureARB(GL_TEXTURE2_ARB);
data->glBindTexture(texturedata->type, texturedata->vtexture);
data->glActiveTextureARB(GL_TEXTURE1_ARB);
data->glBindTexture(texturedata->type, texturedata->utexture);
data->glActiveTextureARB(GL_TEXTURE0_ARB);
}
if (texturedata->nv12) {
data->glActiveTextureARB(GL_TEXTURE1_ARB);
data->glBindTexture(texturedata->type, texturedata->utexture);
data->glActiveTextureARB(GL_TEXTURE0_ARB);
}
data->glBindTexture(texturedata->type, texturedata->texture);
if (texture->modMode) {
GL_SetColor(data, texture->r, texture->g, texture->b, texture->a);
} else {
GL_SetColor(data, 255, 255, 255, 255);
}
GL_SetBlendMode(data, texture->blendMode);
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV);
} else if (texturedata->nv12) {
if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12);
} else {
GL_SetShader(data, SHADER_NV21);
}
} else {
GL_SetShader(data, SHADER_RGB);
}
return 0;
}
static int
GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
GLfloat minx, miny, maxx, maxy;
GLfloat minu, maxu, minv, maxv;
GL_ActivateRenderer(renderer);
if (GL_SetupCopy(renderer, texture) < 0) {
return -1;
}
minx = dstrect->x;
miny = dstrect->y;
maxx = dstrect->x + dstrect->w;
maxy = dstrect->y + dstrect->h;
minu = (GLfloat) srcrect->x / texture->w;
minu *= texturedata->texw;
maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
maxu *= texturedata->texw;
minv = (GLfloat) srcrect->y / texture->h;
minv *= texturedata->texh;
maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
maxv *= texturedata->texh;
data->glBegin(GL_TRIANGLE_STRIP);
data->glTexCoord2f(minu, minv);
data->glVertex2f(minx, miny);
data->glTexCoord2f(maxu, minv);
data->glVertex2f(maxx, miny);
data->glTexCoord2f(minu, maxv);
data->glVertex2f(minx, maxy);
data->glTexCoord2f(maxu, maxv);
data->glVertex2f(maxx, maxy);
data->glEnd();
data->glDisable(texturedata->type);
return GL_CheckError("", renderer);
}
static int
GL_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect,
const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
GLfloat minx, miny, maxx, maxy;
GLfloat centerx, centery;
GLfloat minu, maxu, minv, maxv;
GL_ActivateRenderer(renderer);
if (GL_SetupCopy(renderer, texture) < 0) {
return -1;
}
centerx = center->x;
centery = center->y;
if (flip & SDL_FLIP_HORIZONTAL) {
minx = dstrect->w - centerx;
maxx = -centerx;
}
else {
minx = -centerx;
maxx = dstrect->w - centerx;
}
if (flip & SDL_FLIP_VERTICAL) {
miny = dstrect->h - centery;
maxy = -centery;
}
else {
miny = -centery;
maxy = dstrect->h - centery;
}
minu = (GLfloat) srcrect->x / texture->w;
minu *= texturedata->texw;
maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
maxu *= texturedata->texw;
minv = (GLfloat) srcrect->y / texture->h;
minv *= texturedata->texh;
maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
maxv *= texturedata->texh;
/* Translate to flip, rotate, translate to position */
data->glPushMatrix();
data->glTranslatef((GLfloat)dstrect->x + centerx, (GLfloat)dstrect->y + centery, (GLfloat)0.0);
data->glRotated(angle, (GLdouble)0.0, (GLdouble)0.0, (GLdouble)1.0);
data->glBegin(GL_TRIANGLE_STRIP);
data->glTexCoord2f(minu, minv);
data->glVertex2f(minx, miny);
data->glTexCoord2f(maxu, minv);
data->glVertex2f(maxx, miny);
data->glTexCoord2f(minu, maxv);
data->glVertex2f(minx, maxy);
data->glTexCoord2f(maxu, maxv);
data->glVertex2f(maxx, maxy);
data->glEnd();
data->glPopMatrix();
data->glDisable(texturedata->type);
return GL_CheckError("", renderer);
}
static int
GL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
Uint32 temp_format = SDL_PIXELFORMAT_ARGB8888;
void *temp_pixels;
int temp_pitch;
GLint internalFormat;
GLenum format, type;
Uint8 *src, *dst, *tmp;
int w, h, length, rows;
int status;
GL_ActivateRenderer(renderer);
temp_pitch = rect->w * SDL_BYTESPERPIXEL(temp_format);
temp_pixels = SDL_malloc(rect->h * temp_pitch);
if (!temp_pixels) {
return SDL_OutOfMemory();
}
convert_format(data, temp_format, &internalFormat, &format, &type);
SDL_GetRendererOutputSize(renderer, &w, &h);
data->glPixelStorei(GL_PACK_ALIGNMENT, 1);
data->glPixelStorei(GL_PACK_ROW_LENGTH,
(temp_pitch / SDL_BYTESPERPIXEL(temp_format)));
data->glReadPixels(rect->x, (h-rect->y)-rect->h, rect->w, rect->h,
format, type, temp_pixels);
if (GL_CheckError("glReadPixels()", renderer) < 0) {
SDL_free(temp_pixels);
return -1;
}
/* Flip the rows to be top-down */
length = rect->w * SDL_BYTESPERPIXEL(temp_format);
src = (Uint8*)temp_pixels + (rect->h-1)*temp_pitch;
dst = (Uint8*)temp_pixels;
tmp = SDL_stack_alloc(Uint8, length);
rows = rect->h / 2;
while (rows--) {
SDL_memcpy(tmp, dst, length);
SDL_memcpy(dst, src, length);
SDL_memcpy(src, tmp, length);
dst += temp_pitch;
src -= temp_pitch;
}
SDL_stack_free(tmp);
status = SDL_ConvertPixels(rect->w, rect->h,
temp_format, temp_pixels, temp_pitch,
pixel_format, pixels, pitch);
SDL_free(temp_pixels);
return status;
}
static void
GL_RenderPresent(SDL_Renderer * renderer)
{
GL_ActivateRenderer(renderer);
SDL_GL_SwapWindow(renderer->window);
}
static void
GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
GL_ActivateRenderer(renderer);
if (!data) {
return;
}
if (data->texture) {
renderdata->glDeleteTextures(1, &data->texture);
}
if (data->yuv) {
renderdata->glDeleteTextures(1, &data->utexture);
renderdata->glDeleteTextures(1, &data->vtexture);
}
SDL_free(data->pixels);
SDL_free(data);
texture->driverdata = NULL;
}
static void
GL_DestroyRenderer(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (data) {
GL_ClearErrors(renderer);
if (data->GL_ARB_debug_output_supported) {
PFNGLDEBUGMESSAGECALLBACKARBPROC glDebugMessageCallbackARBFunc = (PFNGLDEBUGMESSAGECALLBACKARBPROC) SDL_GL_GetProcAddress("glDebugMessageCallbackARB");
/* Uh oh, we don't have a safe way of removing ourselves from the callback chain, if it changed after we set our callback. */
/* For now, just always replace the callback with the original one */
glDebugMessageCallbackARBFunc(data->next_error_callback, data->next_error_userparam);
}
if (data->shaders) {
GL_DestroyShaderContext(data->shaders);
}
if (data->context) {
while (data->framebuffers) {
GL_FBOList *nextnode = data->framebuffers->next;
/* delete the framebuffer object */
data->glDeleteFramebuffersEXT(1, &data->framebuffers->FBO);
GL_CheckError("", renderer);
SDL_free(data->framebuffers);
data->framebuffers = nextnode;
}
SDL_GL_DeleteContext(data->context);
}
SDL_free(data);
}
SDL_free(renderer);
}
static int
GL_BindTexture (SDL_Renderer * renderer, SDL_Texture *texture, float *texw, float *texh)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
GL_ActivateRenderer(renderer);
data->glEnable(texturedata->type);
if (texturedata->yuv) {
data->glActiveTextureARB(GL_TEXTURE2_ARB);
data->glBindTexture(texturedata->type, texturedata->vtexture);
data->glActiveTextureARB(GL_TEXTURE1_ARB);
data->glBindTexture(texturedata->type, texturedata->utexture);
data->glActiveTextureARB(GL_TEXTURE0_ARB);
}
data->glBindTexture(texturedata->type, texturedata->texture);
if(texw) *texw = (float)texturedata->texw;
if(texh) *texh = (float)texturedata->texh;
return 0;
}
static int
GL_UnbindTexture (SDL_Renderer * renderer, SDL_Texture *texture)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
GL_ActivateRenderer(renderer);
if (texturedata->yuv) {
data->glActiveTextureARB(GL_TEXTURE2_ARB);
data->glDisable(texturedata->type);
data->glActiveTextureARB(GL_TEXTURE1_ARB);
data->glDisable(texturedata->type);
data->glActiveTextureARB(GL_TEXTURE0_ARB);
}
data->glDisable(texturedata->type);
return 0;
}
#endif /* SDL_VIDEO_RENDER_OGL && !SDL_RENDER_DISABLED */
/* vi: set ts=4 sw=4 expandtab: */
SDL_Renderer::RenderDrawLines
int(* RenderDrawLines)(SDL_Renderer *renderer, const SDL_FPoint *points, int count)
Definition: SDL_sysrender.h:106
GL_ONE
#define GL_ONE
Definition: SDL_opengl.h:394
GL_STACK_UNDERFLOW
#define GL_STACK_UNDERFLOW
Definition: SDL_opengl.h:717
SDL_Texture::blendMode
SDL_BlendMode blendMode
Definition: SDL_sysrender.h:57
dst
GLenum GLenum dst
Definition: SDL_opengl_glext.h:1737
SDL_PIXELFORMAT_ARGB8888
Definition: SDL_pixels.h:247
SDL_FRect::w
float w
Definition: SDL_sysrender.h:44
format
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: SDL_opengl.h:1565
SDL_GL_ExtensionSupported
#define SDL_GL_ExtensionSupported
Definition: SDL_dynapi_overrides.h:560
GL_INVALID_ENUM
#define GL_INVALID_ENUM
Definition: SDL_opengl.h:713
SDL_Renderer::RenderDrawPoints
int(* RenderDrawPoints)(SDL_Renderer *renderer, const SDL_FPoint *points, int count)
Definition: SDL_sysrender.h:104
SDL_Renderer::LockTexture
int(* LockTexture)(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect, void **pixels, int *pitch)
Definition: SDL_sysrender.h:97
GL_FALSE
#define GL_FALSE
Definition: SDL_opengl.h:192
SDL_FLIP_HORIZONTAL
Definition: SDL_render.h:114
GL_STORAGE_CACHED_APPLE
#define GL_STORAGE_CACHED_APPLE
Definition: SDL_opengl_glext.h:5247
GL_UNPACK_CLIENT_STORAGE_APPLE
#define GL_UNPACK_CLIENT_STORAGE_APPLE
Definition: SDL_opengl_glext.h:5128
x1
GLuint GLfloat GLfloat GLfloat x1
Definition: SDL_opengl_glext.h:8583
GLDEBUGPROCARB
void(APIENTRY * GLDEBUGPROCARB)(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message, const void *userParam)
Definition: SDL_opengl_glext.h:2717
GL_INVALID_OPERATION
#define GL_INVALID_OPERATION
Definition: SDL_opengl.h:715
SDL_RendererInfo::max_texture_width
int max_texture_width
Definition: SDL_render.h:84
r
GLdouble GLdouble GLdouble r
Definition: SDL_opengl.h:2072
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
GL_SCISSOR_TEST
#define GL_SCISSOR_TEST
Definition: SDL_opengl.h:608
SHADER_NV12
Definition: SDL_shaders_gl.h:30
SDL_RENDERER_ACCELERATED
Definition: SDL_render.h:67
GL_UNSIGNED_INT_8_8_8_8_REV
#define GL_UNSIGNED_INT_8_8_8_8_REV
Definition: SDL_opengl.h:1514
Uint32
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:157
SDL_GL_CreateContext
#define SDL_GL_CreateContext
Definition: SDL_dynapi_overrides.h:563
SDL_Renderer::RenderReadPixels
int(* RenderReadPixels)(SDL_Renderer *renderer, const SDL_Rect *rect, Uint32 format, void *pixels, int pitch)
Definition: SDL_sysrender.h:115
framebuffers
const GLuint * framebuffers
Definition: SDL_opengl_glext.h:1175
SDL_Renderer::info
SDL_RendererInfo info
Definition: SDL_sysrender.h:126
GL_TEXTURE0_ARB
#define GL_TEXTURE0_ARB
Definition: SDL_opengl.h:1983
SDL_RENDERER_TARGETTEXTURE
Definition: SDL_render.h:71
SDL_RendererInfo::flags
Uint32 flags
Definition: SDL_render.h:81
SDL_log.h
GL_TRUE
#define GL_TRUE
Definition: SDL_opengl.h:193
SDL_BLENDMODE_NONE
Definition: SDL_blendmode.h:42
GL_YCBCR_422_APPLE
#define GL_YCBCR_422_APPLE
Definition: SDL_opengl_glext.h:5326
message
GLuint GLsizei const GLchar * message
Definition: SDL_opengl_glext.h:2483
GL_DEBUG_CALLBACK_USER_PARAM_ARB
#define GL_DEBUG_CALLBACK_USER_PARAM_ARB
Definition: SDL_opengl_glext.h:2721
GL_PROJECTION
#define GL_PROJECTION
Definition: SDL_opengl.h:265
GL_TEXTURE2_ARB
#define GL_TEXTURE2_ARB
Definition: SDL_opengl.h:1985
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1567
SDL_Texture::g
Uint8 g
Definition: SDL_sysrender.h:58
count
GLuint GLuint GLsizei count
Definition: SDL_opengl.h:1564
rect
SDL_Rect rect
Definition: testrelative.c:27
window
SDL_Window * window
Definition: testautomation_render.c:26
GL_LINEAR
#define GL_LINEAR
Definition: SDL_opengl.h:440
SDL_HINT_RENDER_SCALE_QUALITY
#define SDL_HINT_RENDER_SCALE_QUALITY
A variable controlling the scaling quality.
Definition: SDL_hints.h:131
GL_CLAMP_TO_EDGE
#define GL_CLAMP_TO_EDGE
Definition: SDL_opengl.h:1500
texture
GLenum GLenum GLuint texture
Definition: SDL_opengl_glext.h:1178
SDL_RENDERER_PRESENTVSYNC
Definition: SDL_render.h:69
GL_RGBA8
#define GL_RGBA8
Definition: SDL_opengl.h:781
SDL_Renderer::driverdata
void * driverdata
Definition: SDL_sysrender.h:161
y2
GLfixed GLfixed GLfixed y2
Definition: SDL_opengl_glext.h:4583
APIENTRY
#define APIENTRY
Definition: SDL_opengl.h:132
GL_REPLACE
#define GL_REPLACE
Definition: SDL_opengl.h:479
GLint
int GLint
Definition: SDL_opengl.h:175
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
SDL_RendererInfo::texture_formats
Uint32 texture_formats[16]
Definition: SDL_render.h:83
SDL_GetHint
#define SDL_GetHint
Definition: SDL_dynapi_overrides.h:197
SDL_GetWindowFlags
#define SDL_GetWindowFlags
Definition: SDL_dynapi_overrides.h:522
SDL_Renderer
Definition: SDL_sysrender.h:76
SDL_HINT_RENDER_OPENGL_SHADERS
#define SDL_HINT_RENDER_OPENGL_SHADERS
A variable controlling whether the OpenGL render driver uses shaders if they are available.
Definition: SDL_hints.h:95
SDL_FLIP_VERTICAL
Definition: SDL_render.h:115
f
GLfloat f
Definition: SDL_opengl_glext.h:1870
SDL_BYTESPERPIXEL
#define SDL_BYTESPERPIXEL(X)
Definition: SDL_pixels.h:127
SDL_PIXELFORMAT_NV21
Definition: SDL_pixels.h:275
GL_TEXTURE_MAG_FILTER
#define GL_TEXTURE_MAG_FILTER
Definition: SDL_opengl.h:667
GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB
#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB
Definition: SDL_opengl_glext.h:3988
SDL_Renderer::RenderFillRects
int(* RenderFillRects)(SDL_Renderer *renderer, const SDL_FRect *rects, int count)
Definition: SDL_sysrender.h:108
pixels
GLint GLint GLsizei GLsizei GLsizei GLint GLenum GLenum const GLvoid * pixels
Definition: SDL_opengl.h:1565
shaders
GLsizei GLsizei GLuint * shaders
Definition: SDL_opengl_glext.h:671
GL_TEXTURE_STORAGE_HINT_APPLE
#define GL_TEXTURE_STORAGE_HINT_APPLE
Definition: SDL_opengl_glext.h:5245
SDL_Renderer::clip_rect
SDL_Rect clip_rect
Definition: SDL_sysrender.h:143
GL_TRIANGLE_STRIP
#define GL_TRIANGLE_STRIP
Definition: SDL_opengl.h:214
GLfloat
float GLfloat
Definition: SDL_opengl.h:180
SDL_realloc
#define SDL_realloc
Definition: SDL_dynapi_overrides.h:382
SDL_strcasecmp
#define SDL_strcasecmp
Definition: SDL_dynapi_overrides.h:425
GL_ShaderContext
struct GL_ShaderContext GL_ShaderContext
Definition: SDL_shaders_gl.h:35
SDL_WINDOWEVENT_SIZE_CHANGED
Definition: SDL_video.h:146
SDL_RendererInfo::max_texture_height
int max_texture_height
Definition: SDL_render.h:85
GL_MAX_TEXTURE_UNITS_ARB
#define GL_MAX_TEXTURE_UNITS_ARB
Definition: SDL_opengl.h:2017
GL_ONE_MINUS_SRC_ALPHA
#define GL_ONE_MINUS_SRC_ALPHA
Definition: SDL_opengl.h:398
SDL_FRect::y
float y
Definition: SDL_sysrender.h:43
GL_UNPACK_ROW_LENGTH
#define GL_UNPACK_ROW_LENGTH
Definition: SDL_opengl.h:653
SDL_FORCE_INLINE
#define SDL_FORCE_INLINE
Definition: begin_code.h:133
GL_LUMINANCE
#define GL_LUMINANCE
Definition: SDL_opengl.h:503
size
GLsizeiptr size
Definition: SDL_opengl_glext.h:537
SDL_Renderer::window
SDL_Window * window
Definition: SDL_sysrender.h:129
SDL_RenderDriver::info
SDL_RendererInfo info
Definition: SDL_sysrender.h:170
x2
GLfixed GLfixed x2
Definition: SDL_opengl_glext.h:4583
SDL_Renderer::RenderClear
int(* RenderClear)(SDL_Renderer *renderer)
Definition: SDL_sysrender.h:103
SDL_Texture::a
Uint8 a
Definition: SDL_sysrender.h:58
GL_FRAMEBUFFER_COMPLETE_EXT
#define GL_FRAMEBUFFER_COMPLETE_EXT
Definition: SDL_opengl_glext.h:6698
SDL_WINDOWEVENT_HIDDEN
Definition: SDL_video.h:140
SDL_Renderer::DestroyRenderer
void(* DestroyRenderer)(SDL_Renderer *renderer)
Definition: SDL_sysrender.h:120
points
GLfixed GLfixed GLint GLint GLfixed points
Definition: SDL_opengl_glext.h:4558
SDL_Texture
Definition: SDL_sysrender.h:49
SDL_Renderer::GetOutputSize
int(* GetOutputSize)(SDL_Renderer *renderer, int *w, int *h)
Definition: SDL_sysrender.h:81
GL_PACK_ROW_LENGTH
#define GL_PACK_ROW_LENGTH
Definition: SDL_opengl.h:647
GL_MODULATE
#define GL_MODULATE
Definition: SDL_opengl.h:696
SDL_BLENDMODE_MOD
Definition: SDL_blendmode.h:50
GL_TEXTURE_RECTANGLE_ARB
#define GL_TEXTURE_RECTANGLE_ARB
Definition: SDL_opengl_glext.h:3985
y1
GLfixed y1
Definition: SDL_opengl_glext.h:4583
SDL_GL_CONTEXT_MINOR_VERSION
Definition: SDL_video.h:189
GL_PACK_ALIGNMENT
#define GL_PACK_ALIGNMENT
Definition: SDL_opengl.h:645
GL_DestroyShaderContext
void GL_DestroyShaderContext(GL_ShaderContext *ctx)
SDL_LogError
#define SDL_LogError
Definition: SDL_dynapi_overrides.h:42
GL_MAX_TEXTURE_SIZE
#define GL_MAX_TEXTURE_SIZE
Definition: SDL_opengl.h:529
GL_NO_ERROR
#define GL_NO_ERROR
Definition: SDL_opengl.h:712
SDL_opengl.h
blendMode
static SDL_BlendMode blendMode
Definition: testdraw2.c:34
GL_BLEND
#define GL_BLEND
Definition: SDL_opengl.h:390
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:126
GL_TABLE_TOO_LARGE
#define GL_TABLE_TOO_LARGE
Definition: SDL_opengl.h:1641
g
GLboolean GLboolean g
Definition: SDL_opengl_glext.h:1109
GL_SRC_COLOR
#define GL_SRC_COLOR
Definition: SDL_opengl.h:395
SDL_Renderer::UpdateTexture
int(* UpdateTexture)(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect, const void *pixels, int pitch)
Definition: SDL_sysrender.h:89
SDL_Renderer::UpdateTextureYUV
int(* UpdateTextureYUV)(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect, const Uint8 *Yplane, int Ypitch, const Uint8 *Uplane, int Upitch, const Uint8 *Vplane, int Vpitch)
Definition: SDL_sysrender.h:92
SDL_GL_CONTEXT_FLAGS
Definition: SDL_video.h:191
renderer
SDL_Renderer * renderer
Definition: testautomation_render.c:27
SDL_GL_SetAttribute
#define SDL_GL_SetAttribute
Definition: SDL_dynapi_overrides.h:561
SDL_PIXELFORMAT_NV12
Definition: SDL_pixels.h:273
SDL_GL_GetDrawableSize
#define SDL_GL_GetDrawableSize
Definition: SDL_dynapi_overrides.h:567
type
GLuint GLuint GLsizei GLenum type
Definition: SDL_opengl.h:1564
SDL_memcpy
#define SDL_memcpy
Definition: SDL_dynapi_overrides.h:393
SDL_calloc
void * SDL_calloc(size_t nmemb, size_t size)
SDL_LogDebug
#define SDL_LogDebug
Definition: SDL_dynapi_overrides.h:39
SDL_GLContext
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:164
SDL_GL_GetSwapInterval
#define SDL_GL_GetSwapInterval
Definition: SDL_dynapi_overrides.h:569
GL_Shader
GL_Shader
Definition: SDL_shaders_gl.h:25
input
GLenum GLenum GLenum input
Definition: SDL_opengl_glext.h:9374
SDL_GL_CONTEXT_MAJOR_VERSION
Definition: SDL_video.h:188
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1567
SDL_Renderer::target
SDL_Texture * target
Definition: SDL_sysrender.h:156
SDL_Renderer::g
Uint8 g
Definition: SDL_sysrender.h:158
SDL_RecreateWindow
int SDL_RecreateWindow(SDL_Window *window, Uint32 flags)
Definition: SDL_video.c:1469
value
GLsizei const GLfloat * value
Definition: SDL_opengl_glext.h:698
GL_STACK_OVERFLOW
#define GL_STACK_OVERFLOW
Definition: SDL_opengl.h:716
GetScaleQuality
static int GetScaleQuality(void)
Definition: SDL_render_sw.c:583
severity
GLenum GLenum severity
Definition: SDL_opengl_glext.h:2479
Uint8
uint8_t Uint8
An unsigned 8-bit integer type.
Definition: SDL_stdinc.h:139
SDL_stack_alloc
#define SDL_stack_alloc(type, count)
Definition: SDL_stdinc.h:326
event
struct _cl_event * event
Definition: SDL_opengl_glext.h:2649
internalFormat
GLenum internalFormat
Definition: SDL_opengl_glext.h:5063
SDL_Renderer::blendMode
SDL_BlendMode blendMode
Definition: SDL_sysrender.h:159
SDL_GL_SetSwapInterval
#define SDL_GL_SetSwapInterval
Definition: SDL_dynapi_overrides.h:568
SDL_GL_GetProcAddress
#define SDL_GL_GetProcAddress
Definition: SDL_dynapi_overrides.h:558
GL_LINE_STRIP
#define GL_LINE_STRIP
Definition: SDL_opengl.h:212
SDL_free
void SDL_free(void *mem)
GL_COLOR_ATTACHMENT0_EXT
#define GL_COLOR_ATTACHMENT0_EXT
Definition: SDL_opengl_glext.h:6707
GL_TEXTURE_WRAP_T
#define GL_TEXTURE_WRAP_T
Definition: SDL_opengl.h:666
SDL_shaders_gl.h
GL_LINE_LOOP
#define GL_LINE_LOOP
Definition: SDL_opengl.h:211
GL_CreateShaderContext
GL_ShaderContext * GL_CreateShaderContext()
SDL_Renderer::b
Uint8 b
Definition: SDL_sysrender.h:158
GL_LUMINANCE_ALPHA
#define GL_LUMINANCE_ALPHA
Definition: SDL_opengl.h:504
SDL_TEXTUREACCESS_STREAMING
Definition: SDL_render.h:94
SDL_Renderer::GL_BindTexture
int(* GL_BindTexture)(SDL_Renderer *renderer, SDL_Texture *texture, float *texw, float *texh)
Definition: SDL_sysrender.h:122
GL_TEXTURE_2D
#define GL_TEXTURE_2D
Definition: SDL_opengl.h:664
SDL_hints.h
GL_UNSIGNED_BYTE
#define GL_UNSIGNED_BYTE
Definition: SDL_opengl.h:197
SDL_Texture::w
int w
Definition: SDL_sysrender.h:54
SDL_Renderer::UnlockTexture
void(* UnlockTexture)(SDL_Renderer *renderer, SDL_Texture *texture)
Definition: SDL_sysrender.h:99
source
GLsizei GLsizei GLchar * source
Definition: SDL_opengl_glext.h:677
GL_DEBUG_CALLBACK_FUNCTION_ARB
#define GL_DEBUG_CALLBACK_FUNCTION_ARB
Definition: SDL_opengl_glext.h:2720
SDL_Rect::x
int x
Definition: SDL_rect.h:66
SDL_WindowEvent::event
Uint8 event
Definition: SDL_events.h:176
SDL_Renderer::SetRenderTarget
int(* SetRenderTarget)(SDL_Renderer *renderer, SDL_Texture *texture)
Definition: SDL_sysrender.h:100
GL_TEXTURE1_ARB
#define GL_TEXTURE1_ARB
Definition: SDL_opengl.h:1984
SDL_Renderer::UpdateViewport
int(* UpdateViewport)(SDL_Renderer *renderer)
Definition: SDL_sysrender.h:101
SDL_TRUE
Definition: SDL_stdinc.h:129
SDL_glfuncs.h
GL_COLOR_BUFFER_BIT
#define GL_COLOR_BUFFER_BIT
Definition: SDL_opengl.h:735
GL_INVALID_VALUE
#define GL_INVALID_VALUE
Definition: SDL_opengl.h:714
SDL_Rect::w
int w
Definition: SDL_rect.h:67
GL_RGB8
#define GL_RGB8
Definition: SDL_opengl.h:774
SDL_Renderer::GL_UnbindTexture
int(* GL_UnbindTexture)(SDL_Renderer *renderer, SDL_Texture *texture)
Definition: SDL_sysrender.h:123
GL_STORAGE_SHARED_APPLE
#define GL_STORAGE_SHARED_APPLE
Definition: SDL_opengl_glext.h:5248
SDL_FRect::h
float h
Definition: SDL_sysrender.h:45
SDL_RendererFlip
SDL_RendererFlip
Flip constants for SDL_RenderCopyEx.
Definition: SDL_render.h:111
SHADER_SOLID
Definition: SDL_shaders_gl.h:27
SDL_GL_CONTEXT_PROFILE_MASK
Definition: SDL_video.h:192
SDL_Renderer::RenderCopy
int(* RenderCopy)(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *srcrect, const SDL_FRect *dstrect)
Definition: SDL_sysrender.h:110
SDL_WindowEvent
Window state change event data (event.window.*)
Definition: SDL_events.h:171
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:167
GLenum
unsigned int GLenum
Definition: SDL_opengl.h:169
GL_POINTS
#define GL_POINTS
Definition: SDL_opengl.h:209
NULL
#define NULL
Definition: begin_code.h:143
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
GL_CULL_FACE
#define GL_CULL_FACE
Definition: SDL_opengl.h:295
GL_MODELVIEW
#define GL_MODELVIEW
Definition: SDL_opengl.h:264
SDL_Texture::b
Uint8 b
Definition: SDL_sysrender.h:58
SDL_GL_GetCurrentContext
#define SDL_GL_GetCurrentContext
Definition: SDL_dynapi_overrides.h:566
GLvoid
void GLvoid
Definition: SDL_opengl.h:172
GLuint
unsigned int GLuint
Definition: SDL_opengl.h:178
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:36
GL_OUT_OF_MEMORY
#define GL_OUT_OF_MEMORY
Definition: SDL_opengl.h:718
SDL_RenderDriver
Definition: SDL_sysrender.h:165
glActiveTextureARB
GLAPI void GLAPIENTRY glActiveTextureARB(GLenum texture)
SDL_Renderer::RenderCopyEx
int(* RenderCopyEx)(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *srcquad, const SDL_FRect *dstrect, const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip)
Definition: SDL_sysrender.h:112
SDL_GL_MakeCurrent
#define SDL_GL_MakeCurrent
Definition: SDL_dynapi_overrides.h:564
SDL_WINDOWEVENT_SHOWN
Definition: SDL_video.h:139
SDL_PIXELFORMAT_YV12
Definition: SDL_pixels.h:263
SDL_GetRendererOutputSize
#define SDL_GetRendererOutputSize
Definition: SDL_dynapi_overrides.h:311
SDL_LogInfo
#define SDL_LogInfo
Definition: SDL_dynapi_overrides.h:40
SDL_Renderer::viewport
SDL_Rect viewport
Definition: SDL_sysrender.h:139
SDL_Rect::h
int h
Definition: SDL_rect.h:67
SDL_PIXELFORMAT_IYUV
Definition: SDL_pixels.h:265
SDL_strdup
#define SDL_strdup
Definition: SDL_dynapi_overrides.h:403
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The type used to identify a window.
Definition: SDL_sysvideo.h:71
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#define GL_ZERO
Definition: SDL_opengl.h:393
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Definition: testintersections.c:129
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Definition: SDL_blendmode.h:47
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Definition: SDL_stdinc.h:128
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Definition: SDL_opengl.h:662
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Definition: SDL_render.h:95
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Definition: testoverlay2.c:152
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Definition: SDL_sysrender.h:56
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Definition: SDL_pixels.h:269
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Definition: SDL_opengl.h:320
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Definition: SDL_dynapi_overrides.h:562
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Definition: SDL_sysrender.h:117
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Definition: SDL_opengl.h:665
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Definition: SDL_sysrender.h:158
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Definition: SDL_opengl.h:651
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Definition: SDL_log.h:72
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Definition: SDL_sysrender.h:102
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Definition: SDL_opengl_glext.h:1737
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Definition: SDL_opengl_glext.h:2728
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Definition: SDL_opengl_glext.h:2481
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Definition: SDL_sysrender.h:40
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Definition: SDL_sysrender.h:34
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A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
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Definition: SDL_opengl_glext.h:659
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Definition: SDL_opengl.h:1504
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Definition: SDL_opengl_glext.h:6725
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Definition: SDL_blendmode.h:44
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Definition: SDL_opengl.h:661