SDL_render_gl.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 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 SDL_bool GL_SupportsBlendMode(SDL_Renderer * renderer, SDL_BlendMode blendMode);
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;
SDL_BlendMode 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)
#else
#define GL_CheckError(prefix, renderer) GL_CheckAllErrors(prefix, renderer, SDL_FILE, SDL_LINE, SDL_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", #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 = 0xffffffff;
data->current.blendMode = SDL_BLENDMODE_INVALID;
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;
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->SupportsBlendMode = GL_SupportsBlendMode;
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;
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 **)(char *)&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 */
if (SDL_GetHintBoolean(SDL_HINT_RENDER_OPENGL_SHADERS, SDL_TRUE)) {
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;
}
static GLenum GetBlendFunc(SDL_BlendFactor factor)
{
switch (factor) {
case SDL_BLENDFACTOR_ZERO:
return GL_ZERO;
case SDL_BLENDFACTOR_ONE:
return GL_ONE;
case SDL_BLENDFACTOR_SRC_COLOR:
return GL_SRC_COLOR;
case SDL_BLENDFACTOR_ONE_MINUS_SRC_COLOR:
return GL_ONE_MINUS_SRC_COLOR;
case SDL_BLENDFACTOR_SRC_ALPHA:
return GL_SRC_ALPHA;
case SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA:
return GL_ONE_MINUS_SRC_ALPHA;
case SDL_BLENDFACTOR_DST_COLOR:
return GL_DST_COLOR;
case SDL_BLENDFACTOR_ONE_MINUS_DST_COLOR:
return GL_ONE_MINUS_DST_COLOR;
case SDL_BLENDFACTOR_DST_ALPHA:
return GL_DST_ALPHA;
case SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA:
return GL_ONE_MINUS_DST_ALPHA;
default:
return GL_INVALID_ENUM;
}
}
static GLenum GetBlendEquation(SDL_BlendOperation operation)
{
switch (operation) {
case SDL_BLENDOPERATION_ADD:
return GL_FUNC_ADD;
case SDL_BLENDOPERATION_SUBTRACT:
return GL_FUNC_SUBTRACT;
case SDL_BLENDOPERATION_REV_SUBTRACT:
return GL_FUNC_REVERSE_SUBTRACT;
default:
return GL_INVALID_ENUM;
}
}
static SDL_bool
GL_SupportsBlendMode(SDL_Renderer * renderer, SDL_BlendMode blendMode)
{
SDL_BlendFactor srcColorFactor = SDL_GetBlendModeSrcColorFactor(blendMode);
SDL_BlendFactor srcAlphaFactor = SDL_GetBlendModeSrcAlphaFactor(blendMode);
SDL_BlendOperation colorOperation = SDL_GetBlendModeColorOperation(blendMode);
SDL_BlendFactor dstColorFactor = SDL_GetBlendModeDstColorFactor(blendMode);
SDL_BlendFactor dstAlphaFactor = SDL_GetBlendModeDstAlphaFactor(blendMode);
SDL_BlendOperation alphaOperation = SDL_GetBlendModeAlphaOperation(blendMode);
if (GetBlendFunc(srcColorFactor) == GL_INVALID_ENUM ||
GetBlendFunc(srcAlphaFactor) == GL_INVALID_ENUM ||
GetBlendEquation(colorOperation) == GL_INVALID_ENUM ||
GetBlendFunc(dstColorFactor) == GL_INVALID_ENUM ||
GetBlendFunc(dstAlphaFactor) == GL_INVALID_ENUM ||
GetBlendEquation(alphaOperation) == GL_INVALID_ENUM) {
return SDL_FALSE;
}
if (colorOperation != alphaOperation) {
return SDL_FALSE;
}
return SDL_TRUE;
}
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 (texture->access == SDL_TEXTUREACCESS_TARGET &&
!renderdata->GL_EXT_framebuffer_object_supported) {
return SDL_SetError("Render targets not supported by OpenGL");
}
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 + 1) / 2) * ((data->pitch + 1) / 2);
}
if (texture->format == SDL_PIXELFORMAT_NV12 ||
texture->format == SDL_PIXELFORMAT_NV21) {
/* Need to add size for the U/V plane */
size += 2 * ((texture->h + 1) / 2) * ((data->pitch + 1) / 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+1)/2,
(texture_h+1)/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+1)/2,
(texture_h+1)/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+1)/2,
(texture_h+1)/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 + 1) / 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+1)/2, (rect->h+1)/2,
data->format, data->formattype, pixels);
/* Skip to the correct offset into the next texture */
pixels = (const void*)((const Uint8*)pixels + ((rect->h + 1) / 2) * ((pitch + 1) / 2));
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+1)/2, (rect->h+1)/2,
data->format, data->formattype, pixels);
}
if (data->nv12) {
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, ((pitch + 1) / 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 + 1)/2, (rect->h + 1)/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 + 1)/2, (rect->h + 1)/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 + 1)/2, (rect->h + 1)/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 (!data->GL_EXT_framebuffer_object_supported) {
return SDL_SetError("Render targets not supported by OpenGL");
}
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_GL_GetDrawableSize(renderer->window, &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);
}
}
data->glMatrixMode(GL_MODELVIEW);
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_GL_GetDrawableSize(renderer->window, &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, SDL_BlendMode blendMode)
{
if (blendMode != data->current.blendMode) {
if (blendMode == SDL_BLENDMODE_NONE) {
data->glDisable(GL_BLEND);
} else {
data->glEnable(GL_BLEND);
data->glBlendFuncSeparate(GetBlendFunc(SDL_GetBlendModeSrcColorFactor(blendMode)),
GetBlendFunc(SDL_GetBlendModeDstColorFactor(blendMode)),
GetBlendFunc(SDL_GetBlendModeSrcAlphaFactor(blendMode)),
GetBlendFunc(SDL_GetBlendModeDstAlphaFactor(blendMode)));
data->glBlendEquation(GetBlendEquation(SDL_GetBlendModeColorOperation(blendMode)));
}
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);
if (renderer->clipping_enabled) {
data->glDisable(GL_SCISSOR_TEST);
}
data->glClear(GL_COLOR_BUFFER_BIT);
if (renderer->clipping_enabled) {
data->glEnable(GL_SCISSOR_TEST);
}
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 || texturedata->nv12) {
switch (SDL_GetYUVConversionModeForResolution(texture->w, texture->h)) {
case SDL_YUV_CONVERSION_JPEG:
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV_JPEG);
} else if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12_JPEG);
} else {
GL_SetShader(data, SHADER_NV21_JPEG);
}
break;
case SDL_YUV_CONVERSION_BT601:
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV_BT601);
} else if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12_BT601);
} else {
GL_SetShader(data, SHADER_NV21_BT601);
}
break;
case SDL_YUV_CONVERSION_BT709:
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV_BT709);
} else if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12_BT709);
} else {
GL_SetShader(data, SHADER_NV21_BT709);
}
break;
default:
return SDL_SetError("Unsupported YUV conversion mode");
}
} 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 = renderer->target ? renderer->target->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);
if (!convert_format(data, temp_format, &internalFormat, &format, &type)) {
return SDL_SetError("Texture format %s not supported by OpenGL",
SDL_GetPixelFormatName(temp_format));
}
if (!rect->w || !rect->h) {
return 0; /* nothing to do. */
}
temp_pitch = rect->w * SDL_BYTESPERPIXEL(temp_format);
temp_pixels = SDL_malloc(rect->h * temp_pitch);
if (!temp_pixels) {
return SDL_OutOfMemory();
}
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, renderer->target ? rect->y : (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 if necessary */
if (!renderer->target) {
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) {
if (data->context != NULL) {
/* make sure we delete the right resources! */
GL_ActivateRenderer(renderer);
}
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_GetBlendModeSrcColorFactor
SDL_BlendFactor SDL_GetBlendModeSrcColorFactor(SDL_BlendMode blendMode)
Definition: SDL_render.c:2193
SDL_BlendFactor
SDL_BlendFactor
The normalized factor used to multiply pixel components.
Definition: SDL_blendmode.h:75
SDL_Renderer::RenderDrawLines
int(* RenderDrawLines)(SDL_Renderer *renderer, const SDL_FPoint *points, int count)
Definition: SDL_sysrender.h:107
GL_ONE
#define GL_ONE
Definition: SDL_opengl.h:401
GL_STACK_UNDERFLOW
#define GL_STACK_UNDERFLOW
Definition: SDL_opengl.h:724
SDL_Texture::blendMode
SDL_BlendMode blendMode
Definition: SDL_sysrender.h:57
SDL_YUV_CONVERSION_JPEG
Definition: SDL_surface.h:105
SDL_PIXELFORMAT_ARGB8888
Definition: SDL_pixels.h:248
SDL_FRect::w
float w
Definition: SDL_sysrender.h:44
SDL_GL_ExtensionSupported
#define SDL_GL_ExtensionSupported
Definition: SDL_dynapi_overrides.h:556
r
GLdouble GLdouble GLdouble r
Definition: SDL_opengl.h:2079
GL_INVALID_ENUM
#define GL_INVALID_ENUM
Definition: SDL_opengl.h:720
SDL_Renderer::RenderDrawPoints
int(* RenderDrawPoints)(SDL_Renderer *renderer, const SDL_FPoint *points, int count)
Definition: SDL_sysrender.h:105
SDL_Renderer::LockTexture
int(* LockTexture)(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect, void **pixels, int *pitch)
Definition: SDL_sysrender.h:98
GL_FALSE
#define GL_FALSE
Definition: SDL_opengl.h:199
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
GL_CreateShaderContext
GL_ShaderContext * GL_CreateShaderContext(void)
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:722
SDL_RendererInfo::max_texture_width
int max_texture_width
Definition: SDL_render.h:84
SDL_TRUE
Definition: SDL_stdinc.h:142
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
GL_SCISSOR_TEST
#define GL_SCISSOR_TEST
Definition: SDL_opengl.h:615
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:1521
SDL_GL_CreateContext
#define SDL_GL_CreateContext
Definition: SDL_dynapi_overrides.h:559
SDL_BLENDFACTOR_ONE_MINUS_DST_COLOR
Definition: SDL_blendmode.h:84
SHADER_NV21_JPEG
Definition: SDL_shaders_d3d11.h:34
SDL_Renderer::RenderReadPixels
int(* RenderReadPixels)(SDL_Renderer *renderer, const SDL_Rect *rect, Uint32 format, void *pixels, int pitch)
Definition: SDL_sysrender.h:116
framebuffers
const GLuint * framebuffers
Definition: SDL_opengl_glext.h:1175
SDL_Renderer::info
SDL_RendererInfo info
Definition: SDL_sysrender.h:130
GL_TEXTURE0_ARB
#define GL_TEXTURE0_ARB
Definition: SDL_opengl.h:1990
SDL_RENDERER_TARGETTEXTURE
Definition: SDL_render.h:71
SDL_RendererInfo::flags
Uint32 flags
Definition: SDL_render.h:81
SDL_log.h
dst
GLenum GLenum dst
Definition: SDL_opengl_glext.h:1737
GL_TRUE
#define GL_TRUE
Definition: SDL_opengl.h:200
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
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:272
GL_TEXTURE2_ARB
#define GL_TEXTURE2_ARB
Definition: SDL_opengl.h:1992
SDL_BlendMode
SDL_BlendMode
The blend mode used in SDL_RenderCopy() and drawing operations.
Definition: SDL_blendmode.h:40
SDL_Texture::g
Uint8 g
Definition: SDL_sysrender.h:58
SDL_Renderer::SupportsBlendMode
SDL_bool(* SupportsBlendMode)(SDL_Renderer *renderer, SDL_BlendMode blendMode)
Definition: SDL_sysrender.h:82
count
GLuint GLuint GLsizei count
Definition: SDL_opengl.h:1571
rect
SDL_Rect rect
Definition: testrelative.c:27
GL_LINEAR
#define GL_LINEAR
Definition: SDL_opengl.h:447
SDL_HINT_RENDER_SCALE_QUALITY
#define SDL_HINT_RENDER_SCALE_QUALITY
A variable controlling the scaling quality.
Definition: SDL_hints.h:143
GL_CLAMP_TO_EDGE
#define GL_CLAMP_TO_EDGE
Definition: SDL_opengl.h:1507
SDL_FALSE
Definition: SDL_stdinc.h:141
h
GLfloat GLfloat GLfloat GLfloat h
Definition: SDL_opengl_glext.h:1946
SDL_RENDERER_PRESENTVSYNC
Definition: SDL_render.h:69
GL_RGBA8
#define GL_RGBA8
Definition: SDL_opengl.h:788
SDL_Renderer::driverdata
void * driverdata
Definition: SDL_sysrender.h:171
y2
GLfixed GLfixed GLfixed y2
Definition: SDL_opengl_glext.h:4583
APIENTRY
#define APIENTRY
Definition: SDL_opengl.h:139
GLint
int GLint
Definition: SDL_opengl.h:182
SDL_RendererInfo::texture_formats
Uint32 texture_formats[16]
Definition: SDL_render.h:83
context
static screen_context_t context
Definition: video.c:25
SDL_GetBlendModeDstAlphaFactor
SDL_BlendFactor SDL_GetBlendModeDstAlphaFactor(SDL_BlendMode blendMode)
Definition: SDL_render.c:2221
SDL_GetHint
#define SDL_GetHint
Definition: SDL_dynapi_overrides.h:191
SDL_GetWindowFlags
#define SDL_GetWindowFlags
Definition: SDL_dynapi_overrides.h:518
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:96
SDL_FLIP_VERTICAL
Definition: SDL_render.h:115
SDL_GetBlendModeColorOperation
SDL_BlendOperation SDL_GetBlendModeColorOperation(SDL_BlendMode blendMode)
Definition: SDL_render.c:2207
f
GLfloat f
Definition: SDL_opengl_glext.h:1870
SDL_BYTESPERPIXEL
#define SDL_BYTESPERPIXEL(X)
Definition: SDL_pixels.h:128
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
SDL_PIXELFORMAT_NV21
Definition: SDL_pixels.h:289
GL_TEXTURE_MAG_FILTER
#define GL_TEXTURE_MAG_FILTER
Definition: SDL_opengl.h:674
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:109
SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA
Definition: SDL_blendmode.h:86
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
GL_RenderDriver
SDL_RenderDriver GL_RenderDriver
SHADER_NV12_JPEG
Definition: SDL_shaders_d3d11.h:31
SDL_Renderer::clip_rect
SDL_Rect clip_rect
Definition: SDL_sysrender.h:150
GL_TRIANGLE_STRIP
#define GL_TRIANGLE_STRIP
Definition: SDL_opengl.h:221
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:181
SHADER_YUV_JPEG
Definition: SDL_shaders_d3d.h:26
GLfloat
float GLfloat
Definition: SDL_opengl.h:187
SDL_realloc
#define SDL_realloc
Definition: SDL_dynapi_overrides.h:376
SDL_strcasecmp
#define SDL_strcasecmp
Definition: SDL_dynapi_overrides.h:419
src
GLenum src
Definition: SDL_opengl_glext.h:1737
GL_ShaderContext
struct GL_ShaderContext GL_ShaderContext
Definition: SDL_shaders_gl.h:41
SDL_WINDOWEVENT_SIZE_CHANGED
Definition: SDL_video.h:156
SHADER_NV12_BT601
Definition: SDL_shaders_d3d11.h:32
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:2024
GL_ONE_MINUS_SRC_ALPHA
#define GL_ONE_MINUS_SRC_ALPHA
Definition: SDL_opengl.h:405
SDL_BlendOperation
SDL_BlendOperation
The blend operation used when combining source and destination pixel components.
Definition: SDL_blendmode.h:62
SDL_FRect::y
float y
Definition: SDL_sysrender.h:43
GL_UNPACK_ROW_LENGTH
#define GL_UNPACK_ROW_LENGTH
Definition: SDL_opengl.h:660
SDL_FORCE_INLINE
#define SDL_FORCE_INLINE
Definition: begin_code.h:144
GL_LUMINANCE
#define GL_LUMINANCE
Definition: SDL_opengl.h:510
SDL_Renderer::window
SDL_Window * window
Definition: SDL_sysrender.h:133
SHADER_NV21_BT709
Definition: SDL_shaders_d3d11.h:36
SDL_RenderDriver::info
SDL_RendererInfo info
Definition: SDL_sysrender.h:180
GL_ONE_MINUS_SRC_COLOR
#define GL_ONE_MINUS_SRC_COLOR
Definition: SDL_opengl.h:403
x2
GLfixed GLfixed x2
Definition: SDL_opengl_glext.h:4583
SDL_Renderer::RenderClear
int(* RenderClear)(SDL_Renderer *renderer)
Definition: SDL_sysrender.h:104
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:150
SDL_Renderer::DestroyRenderer
void(* DestroyRenderer)(SDL_Renderer *renderer)
Definition: SDL_sysrender.h:121
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:654
GL_TEXTURE_RECTANGLE_ARB
#define GL_TEXTURE_RECTANGLE_ARB
Definition: SDL_opengl_glext.h:3985
SDL_GetHintBoolean
#define SDL_GetHintBoolean
Definition: SDL_dynapi_overrides.h:608
y1
GLfixed y1
Definition: SDL_opengl_glext.h:4583
SDL_GL_CONTEXT_MINOR_VERSION
Definition: SDL_video.h:200
GL_PACK_ALIGNMENT
#define GL_PACK_ALIGNMENT
Definition: SDL_opengl.h:652
GL_DestroyShaderContext
void GL_DestroyShaderContext(GL_ShaderContext *ctx)
SDL_LogError
#define SDL_LogError
Definition: SDL_dynapi_overrides.h:36
GL_MAX_TEXTURE_SIZE
#define GL_MAX_TEXTURE_SIZE
Definition: SDL_opengl.h:536
GL_NO_ERROR
#define GL_NO_ERROR
Definition: SDL_opengl.h:719
SDL_opengl.h
blendMode
static SDL_BlendMode blendMode
Definition: testdraw2.c:34
GL_BLEND
#define GL_BLEND
Definition: SDL_opengl.h:397
GL_TABLE_TOO_LARGE
#define GL_TABLE_TOO_LARGE
Definition: SDL_opengl.h:1648
GL_SRC_COLOR
#define GL_SRC_COLOR
Definition: SDL_opengl.h:402
format
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: SDL_opengl.h:1572
SDL_Renderer::UpdateTexture
int(* UpdateTexture)(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect, const void *pixels, int pitch)
Definition: SDL_sysrender.h:90
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:93
SDL_GL_CONTEXT_FLAGS
Definition: SDL_video.h:202
SDL_GL_SetAttribute
#define SDL_GL_SetAttribute
Definition: SDL_dynapi_overrides.h:557
SDL_PIXELFORMAT_NV12
Definition: SDL_pixels.h:287
SDL_GL_GetDrawableSize
#define SDL_GL_GetDrawableSize
Definition: SDL_dynapi_overrides.h:563
GL_ONE_MINUS_DST_ALPHA
#define GL_ONE_MINUS_DST_ALPHA
Definition: SDL_opengl.h:407
SDL_memcpy
#define SDL_memcpy
Definition: SDL_dynapi_overrides.h:387
texture
GLenum GLenum GLuint texture
Definition: SDL_opengl_glext.h:1178
SDL_BLENDFACTOR_SRC_COLOR
Definition: SDL_blendmode.h:79
SDL_GetBlendModeAlphaOperation
SDL_BlendOperation SDL_GetBlendModeAlphaOperation(SDL_BlendMode blendMode)
Definition: SDL_render.c:2228
SDL_LogDebug
#define SDL_LogDebug
Definition: SDL_dynapi_overrides.h:33
SDL_GLContext
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:175
SDL_GL_GetSwapInterval
#define SDL_GL_GetSwapInterval
Definition: SDL_dynapi_overrides.h:565
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:199
SHADER_YUV_BT709
Definition: SDL_shaders_d3d.h:28
SDL_BLENDFACTOR_DST_COLOR
Definition: SDL_blendmode.h:83
SDL_Renderer::target
SDL_Texture * target
Definition: SDL_sysrender.h:166
SDL_Renderer::g
Uint8 g
Definition: SDL_sysrender.h:168
SDL_RecreateWindow
int SDL_RecreateWindow(SDL_Window *window, Uint32 flags)
Definition: SDL_video.c:1542
GL_STACK_OVERFLOW
#define GL_STACK_OVERFLOW
Definition: SDL_opengl.h:723
GetScaleQuality
static int GetScaleQuality(void)
Definition: SDL_render_sw.c:591
renderer
static SDL_Renderer * renderer
Definition: testaudiocapture.c:21
severity
GLenum GLenum severity
Definition: SDL_opengl_glext.h:2479
SDL_BLENDFACTOR_ONE_MINUS_SRC_COLOR
Definition: SDL_blendmode.h:80
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:157
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
SDL_stack_alloc
#define SDL_stack_alloc(type, count)
Definition: SDL_stdinc.h:354
event
struct _cl_event * event
Definition: SDL_opengl_glext.h:2649
SDL_Renderer::blendMode
SDL_BlendMode blendMode
Definition: SDL_sysrender.h:169
SDL_GL_SetSwapInterval
#define SDL_GL_SetSwapInterval
Definition: SDL_dynapi_overrides.h:564
SDL_GL_GetProcAddress
#define SDL_GL_GetProcAddress
Definition: SDL_dynapi_overrides.h:554
GL_LINE_STRIP
#define GL_LINE_STRIP
Definition: SDL_opengl.h:219
GL_COLOR_ATTACHMENT0_EXT
#define GL_COLOR_ATTACHMENT0_EXT
Definition: SDL_opengl_glext.h:6707
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Definition: SDL_opengl.h:673
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#define GL_LINE_LOOP
Definition: SDL_opengl.h:218
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Definition: SDL_sysrender.h:168
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#define GL_LUMINANCE_ALPHA
Definition: SDL_opengl.h:511
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Definition: SDL_render.h:94
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Definition: SDL_sysrender.h:123
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Definition: SDL_opengl.h:671
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w
GLubyte GLubyte GLubyte GLubyte w
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GLsizei const GLfloat * value
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Definition: SDL_sysrender.h:100
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#define GL_DEBUG_CALLBACK_FUNCTION_ARB
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Definition: SDL_events.h:179
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GLint GLint GLsizei GLsizei GLsizei GLint GLenum GLenum const GLvoid * pixels
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Definition: SDL_opengl.h:781
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Definition: SDL_opengl_glext.h:537
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Flip constants for SDL_RenderCopyEx.
Definition: SDL_render.h:111
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Definition: SDL_shaders_d3d11.h:27
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Definition: SDL_video.h:203
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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)
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Definition: SDL_events.h:174
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Definition: SDL_assert.h:169
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Definition: SDL_blendmode.h:78
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Definition: begin_code.h:164
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Definition: SDL_error.h:52
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Definition: SDL_stdinc.h:139
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Definition: SDL_opengl.h:271
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Definition: SDL_blendmode.h:65
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Definition: SDL_surface.h:106
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Definition: SDL_opengl.h:179
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Definition: SDL_opengl.h:725
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Definition: SDL_opengl_glext.h:1480
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Definition: SDL_sysrender.h:175
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Definition: SDL_dynapi_overrides.h:560
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Definition: SDL_video.h:149
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Definition: SDL_pixels.h:277
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Definition: eglext.h:1025
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Definition: SDL_dynapi_overrides.h:305
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Definition: SDL_blendmode.h:77
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Definition: SDL_surface.h:107
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#define GL_FUNC_REVERSE_SUBTRACT
Definition: SDL_opengl.h:1654
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#define SDL_LogInfo
Definition: SDL_dynapi_overrides.h:34
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Definition: SDL_sysrender.h:146
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int h
Definition: SDL_rect.h:67
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Definition: SDL_pixels.h:279
SDL_strdup
#define SDL_strdup
Definition: SDL_dynapi_overrides.h:397
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The type used to identify a window.
Definition: SDL_sysvideo.h:73
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#define GL_ZERO
Definition: SDL_opengl.h:400
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#define GL_ONE_MINUS_DST_COLOR
Definition: SDL_opengl.h:409
SDL_GetBlendModeDstColorFactor
SDL_BlendFactor SDL_GetBlendModeDstColorFactor(SDL_BlendMode blendMode)
Definition: SDL_render.c:2200
color
GLuint color
Definition: SDL_opengl_glext.h:1148
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#define GL_SRC_ALPHA
Definition: SDL_opengl.h:404
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#define GL_NEAREST
Definition: SDL_opengl.h:704
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void(* WindowEvent)(SDL_Renderer *renderer, const SDL_WindowEvent *event)
Definition: SDL_sysrender.h:80
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Definition: SDL_render.h:95
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Definition: SDL_blendmode.h:82
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Definition: SDL_opengl_glext.h:6097
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#define GL_FUNC_SUBTRACT
Definition: SDL_opengl.h:1653
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Definition: SDL_render.h:82
type
GLuint GLuint GLsizei GLenum type
Definition: SDL_opengl.h:1571
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Definition: SDL_sysrender.h:52
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Definition: SDL_sysrender.h:56
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Definition: SDL_opengl.h:406
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Definition: SDL_pixels.h:283
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Definition: SDL_shaders_gl.h:26
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Definition: SDL_shaders_d3d11.h:26
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Definition: SDL_opengl.h:327
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Definition: SDL_video.h:101
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Definition: SDL_dynapi_overrides.h:374
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Definition: SDL_dynapi_overrides.h:558
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Definition: SDL_dynapi_overrides.h:465
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Definition: SDL_sysrender.h:119
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Definition: SDL_opengl_glext.h:5225
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Definition: SDL_opengl.h:186
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int(* CreateTexture)(SDL_Renderer *renderer, SDL_Texture *texture)
Definition: SDL_sysrender.h:83
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void(* RenderPresent)(SDL_Renderer *renderer)
Definition: SDL_sysrender.h:118
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Definition: SDL_blendmode.h:66
GLdouble
double GLdouble
Definition: SDL_opengl.h:189
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#define SDL_GL_DeleteContext
Definition: SDL_dynapi_overrides.h:567
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Definition: SDL_sysrender.h:168
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Definition: eglext.h:282
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#define SDL_stack_free(data)
Definition: SDL_stdinc.h:355
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#define SDL_GetYUVConversionModeForResolution
Definition: SDL_dynapi_overrides.h:665
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Definition: SDL_sysrender.h:42
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Definition: SDL_video.h:220
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#define GL_TEXTURE_WRAP_S
Definition: SDL_opengl.h:672
length
GLuint GLsizei GLsizei * length
Definition: SDL_opengl_glext.h:669
GL_TEXTURE_MIN_FILTER
#define GL_TEXTURE_MIN_FILTER
Definition: SDL_opengl.h:675
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Definition: SDL_sysrender.h:168
a
GLboolean GLboolean GLboolean GLboolean a
Definition: SDL_opengl_glext.h:1109
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Definition: SDL_video.h:215
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#define GL_UNPACK_ALIGNMENT
Definition: SDL_opengl.h:658
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Definition: SDL_log.h:72
GL_FUNC_ADD
#define GL_FUNC_ADD
Definition: SDL_opengl.h:1652
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int(* UpdateClipRect)(SDL_Renderer *renderer)
Definition: SDL_sysrender.h:103
GL_DEBUG_TYPE_ERROR_ARB
#define GL_DEBUG_TYPE_ERROR_ARB
Definition: SDL_opengl_glext.h:2728
userParam
const void * userParam
Definition: SDL_opengl_glext.h:2481
g
GLboolean GLboolean g
Definition: SDL_opengl_glext.h:1109
b
GLboolean GLboolean GLboolean b
Definition: SDL_opengl_glext.h:1109
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Definition: SDL_blendmode.h:53
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int access
Definition: SDL_sysrender.h:53
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int y
Definition: SDL_rect.h:66
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#define SDL_GL_SwapWindow
Definition: SDL_dynapi_overrides.h:566
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Definition: SDL_shaders_d3d.h:27
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Definition: SDL_sysrender.h:36
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void GL_SelectShader(GL_ShaderContext *ctx, GL_Shader shader)
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SDL_bool clipping_enabled
Definition: SDL_sysrender.h:154
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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
GL_BGRA
#define GL_BGRA
Definition: SDL_opengl.h:1511
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#define GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB
Definition: SDL_opengl_glext.h:2718
SDL_assert.h
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#define GL_FRAMEBUFFER_EXT
Definition: SDL_opengl_glext.h:6725
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Definition: SDL_shaders_d3d11.h:33
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Definition: SDL_sysrender.h:55
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Definition: SDL_sysrender.h:37
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Definition: SDL_sysrender.h:58
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#define SDL_GetPixelFormatName
Definition: SDL_dynapi_overrides.h:277