src/render/opengles2/SDL_render_gles2.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 29 May 2013 03:07:55 -0700
changeset 7239 04dda95ba22c
parent 7191 75360622e65f
child 7420 fe82b639c4d6
permissions -rw-r--r--
Fixed bug 1622 - SDL_RenderSetViewport with empty SDL_Rect raises wrong error for OpenGL rendering backend

It's now legal to set an empty viewport rect - it will prevent any rendering.

Also added an API to query the output size: SDL_GetRendererOutputSize()
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#if SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED
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#include "SDL_hints.h"
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#include "SDL_opengles2.h"
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#include "../SDL_sysrender.h"
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#include "SDL_shaders_gles2.h"
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/* Used to re-create the window with OpenGL ES capability */
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extern int SDL_RecreateWindow(SDL_Window * window, Uint32 flags);
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/*************************************************************************************************
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 * Bootstrap data                                                                                *
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 *************************************************************************************************/
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static SDL_Renderer *GLES2_CreateRenderer(SDL_Window *window, Uint32 flags);
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SDL_RenderDriver GLES2_RenderDriver = {
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    GLES2_CreateRenderer,
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    {
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        "opengles2",
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        (SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_TARGETTEXTURE),
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        4,
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        {SDL_PIXELFORMAT_ABGR8888,
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        SDL_PIXELFORMAT_ARGB8888,
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        SDL_PIXELFORMAT_RGB888,
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        SDL_PIXELFORMAT_BGR888},
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        0,
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        0
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    }
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};
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/*************************************************************************************************
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 * Context structures                                                                            *
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 *************************************************************************************************/
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typedef struct GLES2_FBOList GLES2_FBOList;
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struct GLES2_FBOList
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{
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   Uint32 w, h;
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   GLuint FBO;
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   GLES2_FBOList *next;
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};
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typedef struct GLES2_TextureData
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{
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    GLenum texture;
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    GLenum texture_type;
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    GLenum pixel_format;
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    GLenum pixel_type;
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    void *pixel_data;
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    size_t pitch;
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    GLES2_FBOList *fbo;
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} GLES2_TextureData;
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typedef struct GLES2_ShaderCacheEntry
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{
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    GLuint id;
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    GLES2_ShaderType type;
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    const GLES2_ShaderInstance *instance;
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    int references;
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    struct GLES2_ShaderCacheEntry *prev;
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    struct GLES2_ShaderCacheEntry *next;
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} GLES2_ShaderCacheEntry;
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typedef struct GLES2_ShaderCache
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{
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    int count;
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    GLES2_ShaderCacheEntry *head;
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} GLES2_ShaderCache;
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typedef struct GLES2_ProgramCacheEntry
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{
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    GLuint id;
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    SDL_BlendMode blend_mode;
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    GLES2_ShaderCacheEntry *vertex_shader;
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    GLES2_ShaderCacheEntry *fragment_shader;
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    GLuint uniform_locations[16];
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    struct GLES2_ProgramCacheEntry *prev;
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    struct GLES2_ProgramCacheEntry *next;
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} GLES2_ProgramCacheEntry;
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typedef struct GLES2_ProgramCache
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{
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    int count;
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    GLES2_ProgramCacheEntry *head;
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    GLES2_ProgramCacheEntry *tail;
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} GLES2_ProgramCache;
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typedef enum
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{
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    GLES2_ATTRIBUTE_POSITION = 0,
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    GLES2_ATTRIBUTE_TEXCOORD = 1,
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    GLES2_ATTRIBUTE_ANGLE = 2,
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    GLES2_ATTRIBUTE_CENTER = 3,
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} GLES2_Attribute;
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typedef enum
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{
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    GLES2_UNIFORM_PROJECTION,
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    GLES2_UNIFORM_TEXTURE,
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    GLES2_UNIFORM_MODULATION,
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    GLES2_UNIFORM_COLOR,
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    GLES2_UNIFORM_COLORTABLE
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} GLES2_Uniform;
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typedef enum
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{
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    GLES2_IMAGESOURCE_SOLID,
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    GLES2_IMAGESOURCE_TEXTURE_ABGR,
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    GLES2_IMAGESOURCE_TEXTURE_ARGB,
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    GLES2_IMAGESOURCE_TEXTURE_RGB,
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    GLES2_IMAGESOURCE_TEXTURE_BGR
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} GLES2_ImageSource;
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typedef struct GLES2_DriverContext
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{
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    SDL_GLContext *context;
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    struct {
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        int blendMode;
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        SDL_bool tex_coords;
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    } current;
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#define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
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#include "SDL_gles2funcs.h"
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#undef SDL_PROC
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    GLES2_FBOList *framebuffers;
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    GLuint window_framebuffer;
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    int shader_format_count;
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    GLenum *shader_formats;
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    GLES2_ShaderCache shader_cache;
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    GLES2_ProgramCache program_cache;
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    GLES2_ProgramCacheEntry *current_program;
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} GLES2_DriverContext;
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#define GLES2_MAX_CACHED_PROGRAMS 8
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/*************************************************************************************************
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 * Renderer state APIs                                                                           *
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 *************************************************************************************************/
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static int GLES2_ActivateRenderer(SDL_Renderer *renderer);
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static void GLES2_WindowEvent(SDL_Renderer * renderer,
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                              const SDL_WindowEvent *event);
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static int GLES2_UpdateViewport(SDL_Renderer * renderer);
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static void GLES2_DestroyRenderer(SDL_Renderer *renderer);
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static int GLES2_SetOrthographicProjection(SDL_Renderer *renderer);
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static SDL_GLContext SDL_CurrentContext = NULL;
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static int GLES2_LoadFunctions(GLES2_DriverContext * data)
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{
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#if SDL_VIDEO_DRIVER_UIKIT
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#define __SDL_NOGETPROCADDR__
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#elif SDL_VIDEO_DRIVER_ANDROID
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#define __SDL_NOGETPROCADDR__
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#elif SDL_VIDEO_DRIVER_PANDORA
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#define __SDL_NOGETPROCADDR__
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#endif
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#if defined __SDL_NOGETPROCADDR__
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#define SDL_PROC(ret,func,params) data->func=func;
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#else
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#define SDL_PROC(ret,func,params) \
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    do { \
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        data->func = SDL_GL_GetProcAddress(#func); \
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        if ( ! data->func ) { \
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            return SDL_SetError("Couldn't load GLES2 function %s: %s\n", #func, SDL_GetError()); \
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        } \
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    } while ( 0 );
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#endif /* _SDL_NOGETPROCADDR_ */
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#include "SDL_gles2funcs.h"
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#undef SDL_PROC
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    return 0;
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}
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GLES2_FBOList *
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GLES2_GetFBO(GLES2_DriverContext *data, Uint32 w, Uint32 h)
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{
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   GLES2_FBOList *result = data->framebuffers;
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   while ((result) && ((result->w != w) || (result->h != h)) )
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   {
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       result = result->next;
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   }
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   if (result == NULL)
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   {
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       result = SDL_malloc(sizeof(GLES2_FBOList));
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       result->w = w;
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       result->h = h;
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       data->glGenFramebuffers(1, &result->FBO);
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       result->next = data->framebuffers;
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       data->framebuffers = result;
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   }
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   return result;
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}
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static int
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GLES2_ActivateRenderer(SDL_Renderer * renderer)
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{
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    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
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    if (SDL_CurrentContext != rdata->context) {
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        /* Null out the current program to ensure we set it again */
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        rdata->current_program = NULL;
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        if (SDL_GL_MakeCurrent(renderer->window, rdata->context) < 0) {
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            return -1;
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        }
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        SDL_CurrentContext = rdata->context;
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        GLES2_UpdateViewport(renderer);
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    }
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    return 0;
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}
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static void
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GLES2_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
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{
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    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
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    if (event->event == SDL_WINDOWEVENT_SIZE_CHANGED ||
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        event->event == SDL_WINDOWEVENT_SHOWN ||
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        event->event == SDL_WINDOWEVENT_HIDDEN) {
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        /* Rebind the context to the window area */
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        SDL_CurrentContext = NULL;
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    }
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    if (event->event == SDL_WINDOWEVENT_MINIMIZED) {
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        /* According to Apple documentation, we need to finish drawing NOW! */
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        rdata->glFinish();
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    }
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}
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static int
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GLES2_UpdateViewport(SDL_Renderer * renderer)
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{
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    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
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    if (SDL_CurrentContext != rdata->context) {
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        /* We'll update the viewport after we rebind the context */
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        return 0;
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    }
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    rdata->glViewport(renderer->viewport.x, renderer->viewport.y,
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               renderer->viewport.w, renderer->viewport.h);
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    if (rdata->current_program) {
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        GLES2_SetOrthographicProjection(renderer);
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    }
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    return 0;
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}
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static int
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GLES2_UpdateClipRect(SDL_Renderer * renderer)
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{
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    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
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    const SDL_Rect *rect = &renderer->clip_rect;
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    if (SDL_CurrentContext != rdata->context) {
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        /* We'll update the clip rect after we rebind the context */
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        return 0;
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    }
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    if (!SDL_RectEmpty(rect)) {
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        rdata->glEnable(GL_SCISSOR_TEST);
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        rdata->glScissor(rect->x, renderer->viewport.h - rect->y - rect->h, rect->w, rect->h);
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    } else {
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        rdata->glDisable(GL_SCISSOR_TEST);
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    }
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    return 0;
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}
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static void
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GLES2_DestroyRenderer(SDL_Renderer *renderer)
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{
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    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
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    /* Deallocate everything */
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    if (rdata) {
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        GLES2_ActivateRenderer(renderer);
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        {
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            GLES2_ShaderCacheEntry *entry;
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            GLES2_ShaderCacheEntry *next;
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            entry = rdata->shader_cache.head;
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            while (entry)
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            {
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                rdata->glDeleteShader(entry->id);
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                next = entry->next;
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                SDL_free(entry);
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                entry = next;
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            }
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        }
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        {
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            GLES2_ProgramCacheEntry *entry;
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            GLES2_ProgramCacheEntry *next;
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            entry = rdata->program_cache.head;
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            while (entry) {
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                rdata->glDeleteProgram(entry->id);
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                next = entry->next;
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                SDL_free(entry);
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                entry = next;
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            }
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        }
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        if (rdata->context) {
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            while (rdata->framebuffers) {
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                GLES2_FBOList *nextnode = rdata->framebuffers->next;
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                rdata->glDeleteFramebuffers(1, &rdata->framebuffers->FBO);
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                SDL_free(rdata->framebuffers);
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                rdata->framebuffers = nextnode;
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            }
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            SDL_GL_DeleteContext(rdata->context);
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        }
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        if (rdata->shader_formats) {
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            SDL_free(rdata->shader_formats);
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        }
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        SDL_free(rdata);
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    }
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    SDL_free(renderer);
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}
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/*************************************************************************************************
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 * Texture APIs                                                                                  *
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 *************************************************************************************************/
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static int GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture);
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static void GLES2_DestroyTexture(SDL_Renderer *renderer, SDL_Texture *texture);
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static int GLES2_LockTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect,
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                             void **pixels, int *pitch);
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static void GLES2_UnlockTexture(SDL_Renderer *renderer, SDL_Texture *texture);
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static int GLES2_UpdateTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect,
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                               const void *pixels, int pitch);
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static int GLES2_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture);
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static GLenum
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GetScaleQuality(void)
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{
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    const char *hint = SDL_GetHint(SDL_HINT_RENDER_SCALE_QUALITY);
slouken@5484
   364
slouken@5484
   365
    if (!hint || *hint == '0' || SDL_strcasecmp(hint, "nearest") == 0) {
slouken@5484
   366
        return GL_NEAREST;
slouken@5484
   367
    } else {
slouken@5484
   368
        return GL_LINEAR;
slouken@5484
   369
    }
slouken@5484
   370
}
slouken@5484
   371
slouken@5201
   372
static int
slouken@5201
   373
GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture)
slouken@5201
   374
{
slouken@6188
   375
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   376
    GLES2_TextureData *tdata;
slouken@5201
   377
    GLenum format;
slouken@5201
   378
    GLenum type;
slouken@5503
   379
    GLenum scaleMode;
slouken@5201
   380
slouken@5201
   381
    GLES2_ActivateRenderer(renderer);
slouken@5201
   382
slouken@5201
   383
    /* Determine the corresponding GLES texture format params */
slouken@5201
   384
    switch (texture->format)
slouken@5201
   385
    {
slouken@5201
   386
    case SDL_PIXELFORMAT_ABGR8888:
slouken@6113
   387
    case SDL_PIXELFORMAT_ARGB8888:
slouken@6113
   388
    case SDL_PIXELFORMAT_BGR888:
slouken@6113
   389
    case SDL_PIXELFORMAT_RGB888:
slouken@5201
   390
        format = GL_RGBA;
slouken@5201
   391
        type = GL_UNSIGNED_BYTE;
slouken@5201
   392
        break;
slouken@5201
   393
    default:
icculus@7037
   394
        return SDL_SetError("Texture format not supported");
slouken@5201
   395
    }
slouken@5201
   396
slouken@5201
   397
    /* Allocate a texture struct */
slouken@5201
   398
    tdata = (GLES2_TextureData *)SDL_calloc(1, sizeof(GLES2_TextureData));
icculus@7037
   399
    if (!tdata) {
icculus@7037
   400
        return SDL_OutOfMemory();
slouken@5201
   401
    }
slouken@5201
   402
    tdata->texture = 0;
slouken@5201
   403
    tdata->texture_type = GL_TEXTURE_2D;
slouken@5201
   404
    tdata->pixel_format = format;
slouken@5201
   405
    tdata->pixel_type = type;
slouken@5503
   406
    scaleMode = GetScaleQuality();
slouken@5201
   407
slouken@5201
   408
    /* Allocate a blob for image data */
icculus@7037
   409
    if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
slouken@5201
   410
        tdata->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
slouken@5402
   411
        tdata->pixel_data = SDL_calloc(1, tdata->pitch * texture->h);
icculus@7037
   412
        if (!tdata->pixel_data) {
slouken@5201
   413
            SDL_free(tdata);
icculus@7037
   414
            return SDL_OutOfMemory();
slouken@5201
   415
        }
slouken@5201
   416
    }
slouken@5201
   417
slouken@5201
   418
    /* Allocate the texture */
slouken@6188
   419
    rdata->glGetError();
slouken@6188
   420
    rdata->glGenTextures(1, &tdata->texture);
slouken@6188
   421
    rdata->glActiveTexture(GL_TEXTURE0);
slouken@6188
   422
    rdata->glBindTexture(tdata->texture_type, tdata->texture);
slouken@6188
   423
    rdata->glTexParameteri(tdata->texture_type, GL_TEXTURE_MIN_FILTER, scaleMode);
slouken@6188
   424
    rdata->glTexParameteri(tdata->texture_type, GL_TEXTURE_MAG_FILTER, scaleMode);
slouken@6188
   425
    rdata->glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
slouken@6188
   426
    rdata->glTexParameteri(tdata->texture_type, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
slouken@6188
   427
    rdata->glTexImage2D(tdata->texture_type, 0, format, texture->w, texture->h, 0, format, type, NULL);
slouken@6188
   428
    if (rdata->glGetError() != GL_NO_ERROR)
slouken@5201
   429
    {
slouken@6188
   430
        rdata->glDeleteTextures(1, &tdata->texture);
slouken@5201
   431
        SDL_free(tdata);
icculus@7037
   432
        return SDL_SetError("Texture creation failed");
slouken@5201
   433
    }
slouken@5201
   434
    texture->driverdata = tdata;
slouken@6232
   435
slouken@6232
   436
    if (texture->access == SDL_TEXTUREACCESS_TARGET) {
slouken@6232
   437
       tdata->fbo = GLES2_GetFBO(renderer->driverdata, texture->w, texture->h);
slouken@6232
   438
    } else {
slouken@6232
   439
       tdata->fbo = NULL;
slouken@6232
   440
    }
slouken@6232
   441
slouken@5201
   442
    return 0;
slouken@5201
   443
}
slouken@5201
   444
slouken@5201
   445
static void
slouken@5201
   446
GLES2_DestroyTexture(SDL_Renderer *renderer, SDL_Texture *texture)
slouken@5201
   447
{
slouken@6188
   448
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   449
    GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
slouken@5201
   450
slouken@5201
   451
    GLES2_ActivateRenderer(renderer);
slouken@5201
   452
slouken@5201
   453
    /* Destroy the texture */
slouken@5201
   454
    if (tdata)
slouken@5201
   455
    {
slouken@6188
   456
        rdata->glDeleteTextures(1, &tdata->texture);
slouken@5201
   457
        SDL_free(tdata->pixel_data);
slouken@5201
   458
        SDL_free(tdata);
slouken@5201
   459
        texture->driverdata = NULL;
slouken@5201
   460
    }
slouken@5201
   461
}
slouken@5201
   462
slouken@5201
   463
static int
slouken@5201
   464
GLES2_LockTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect,
slouken@5201
   465
                  void **pixels, int *pitch)
slouken@5201
   466
{
slouken@5201
   467
    GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
slouken@5201
   468
slouken@5201
   469
    /* Retrieve the buffer/pitch for the specified region */
slouken@5201
   470
    *pixels = (Uint8 *)tdata->pixel_data +
slouken@5201
   471
              (tdata->pitch * rect->y) +
slouken@5201
   472
              (rect->x * SDL_BYTESPERPIXEL(texture->format));
slouken@5201
   473
    *pitch = tdata->pitch;
slouken@5201
   474
slouken@5201
   475
    return 0;
slouken@5201
   476
}
slouken@5201
   477
slouken@5201
   478
static void
slouken@5201
   479
GLES2_UnlockTexture(SDL_Renderer *renderer, SDL_Texture *texture)
slouken@5201
   480
{
slouken@5201
   481
    GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
slouken@5227
   482
    SDL_Rect rect;
slouken@5201
   483
slouken@5227
   484
    /* We do whole texture updates, at least for now */
slouken@5227
   485
    rect.x = 0;
slouken@5227
   486
    rect.y = 0;
slouken@5227
   487
    rect.w = texture->w;
slouken@5227
   488
    rect.h = texture->h;
slouken@5227
   489
    GLES2_UpdateTexture(renderer, texture, &rect, tdata->pixel_data, tdata->pitch);
slouken@5201
   490
}
slouken@5201
   491
slouken@5201
   492
static int
slouken@5201
   493
GLES2_UpdateTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect,
slouken@5201
   494
                    const void *pixels, int pitch)
slouken@5201
   495
{
slouken@6188
   496
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   497
    GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
slouken@5201
   498
    Uint8 *blob = NULL;
slouken@5201
   499
    Uint8 *src;
slouken@5201
   500
    int srcPitch;
slouken@5201
   501
    int y;
slouken@5201
   502
slouken@5201
   503
    GLES2_ActivateRenderer(renderer);
slouken@6232
   504
slouken@5201
   505
    /* Bail out if we're supposed to update an empty rectangle */
slouken@5201
   506
    if (rect->w <= 0 || rect->h <= 0)
slouken@5201
   507
        return 0;
slouken@5201
   508
slouken@5201
   509
    /* Reformat the texture data into a tightly packed array */
slouken@5201
   510
    srcPitch = rect->w * SDL_BYTESPERPIXEL(texture->format);
slouken@5201
   511
    src = (Uint8 *)pixels;
icculus@7037
   512
    if (pitch != srcPitch) {
slouken@5201
   513
        blob = (Uint8 *)SDL_malloc(srcPitch * rect->h);
icculus@7037
   514
        if (!blob) {
icculus@7037
   515
            return SDL_OutOfMemory();
slouken@5201
   516
        }
slouken@5201
   517
        src = blob;
slouken@5201
   518
        for (y = 0; y < rect->h; ++y)
slouken@5201
   519
        {
slouken@5201
   520
            SDL_memcpy(src, pixels, srcPitch);
slouken@5201
   521
            src += srcPitch;
slouken@5201
   522
            pixels = (Uint8 *)pixels + pitch;
slouken@5201
   523
        }
slouken@5201
   524
        src = blob;
slouken@5201
   525
    }
slouken@5201
   526
slouken@5201
   527
    /* Create a texture subimage with the supplied data */
slouken@6188
   528
    rdata->glGetError();
slouken@6188
   529
    rdata->glActiveTexture(GL_TEXTURE0);
slouken@6188
   530
    rdata->glBindTexture(tdata->texture_type, tdata->texture);
slouken@6188
   531
    rdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
slouken@6188
   532
    rdata->glTexSubImage2D(tdata->texture_type,
slouken@5201
   533
                    0,
slouken@5201
   534
                    rect->x,
slouken@5201
   535
                    rect->y,
slouken@5201
   536
                    rect->w,
slouken@5201
   537
                    rect->h,
slouken@5201
   538
                    tdata->pixel_format,
slouken@5201
   539
                    tdata->pixel_type,
slouken@5201
   540
                    src);
slouken@5227
   541
    if (blob) {
slouken@5227
   542
        SDL_free(blob);
slouken@5227
   543
    }
slouken@5214
   544
icculus@7037
   545
    if (rdata->glGetError() != GL_NO_ERROR) {
icculus@7037
   546
        return SDL_SetError("Failed to update texture");
slouken@5201
   547
    }
slouken@5201
   548
    return 0;
slouken@5201
   549
}
slouken@5201
   550
slouken@6246
   551
static int
slouken@6247
   552
GLES2_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture)
slouken@6246
   553
{
slouken@6246
   554
    GLES2_DriverContext *data = (GLES2_DriverContext *) renderer->driverdata;
slouken@6246
   555
    GLES2_TextureData *texturedata = NULL;
slouken@6246
   556
    GLenum status;
slouken@6246
   557
slouken@6246
   558
    if (texture == NULL) {
slouken@6271
   559
        data->glBindFramebuffer(GL_FRAMEBUFFER, data->window_framebuffer);
slouken@6246
   560
    } else {
slouken@6246
   561
        texturedata = (GLES2_TextureData *) texture->driverdata;
slouken@6246
   562
        data->glBindFramebuffer(GL_FRAMEBUFFER, texturedata->fbo->FBO);
slouken@6246
   563
        /* TODO: check if texture pixel format allows this operation */
slouken@6246
   564
        data->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texturedata->texture_type, texturedata->texture, 0);
slouken@6246
   565
        /* Check FBO status */
slouken@6246
   566
        status = data->glCheckFramebufferStatus(GL_FRAMEBUFFER);
slouken@6246
   567
        if (status != GL_FRAMEBUFFER_COMPLETE) {
icculus@7037
   568
            return SDL_SetError("glFramebufferTexture2D() failed");
slouken@6246
   569
        }
slouken@6246
   570
    }
slouken@6246
   571
    return 0;
slouken@6246
   572
}
slouken@6246
   573
slouken@5201
   574
/*************************************************************************************************
slouken@5201
   575
 * Shader management functions                                                                   *
slouken@5201
   576
 *************************************************************************************************/
slouken@5201
   577
slouken@5201
   578
static GLES2_ShaderCacheEntry *GLES2_CacheShader(SDL_Renderer *renderer, GLES2_ShaderType type,
slouken@5201
   579
                                                 SDL_BlendMode blendMode);
slouken@5201
   580
static void GLES2_EvictShader(SDL_Renderer *renderer, GLES2_ShaderCacheEntry *entry);
slouken@5201
   581
static GLES2_ProgramCacheEntry *GLES2_CacheProgram(SDL_Renderer *renderer,
slouken@5201
   582
                                                   GLES2_ShaderCacheEntry *vertex,
slouken@5201
   583
                                                   GLES2_ShaderCacheEntry *fragment,
slouken@5201
   584
                                                   SDL_BlendMode blendMode);
slouken@5201
   585
static int GLES2_SelectProgram(SDL_Renderer *renderer, GLES2_ImageSource source,
slouken@5201
   586
                               SDL_BlendMode blendMode);
slouken@5201
   587
slouken@5201
   588
static GLES2_ProgramCacheEntry *
slouken@5201
   589
GLES2_CacheProgram(SDL_Renderer *renderer, GLES2_ShaderCacheEntry *vertex,
slouken@5201
   590
                   GLES2_ShaderCacheEntry *fragment, SDL_BlendMode blendMode)
slouken@5201
   591
{
slouken@5201
   592
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   593
    GLES2_ProgramCacheEntry *entry;
slouken@5201
   594
    GLES2_ShaderCacheEntry *shaderEntry;
slouken@5201
   595
    GLint linkSuccessful;
slouken@5201
   596
slouken@5201
   597
    /* Check if we've already cached this program */
slouken@5201
   598
    entry = rdata->program_cache.head;
slouken@5201
   599
    while (entry)
slouken@5201
   600
    {
slouken@5201
   601
        if (entry->vertex_shader == vertex && entry->fragment_shader == fragment)
slouken@5201
   602
            break;
slouken@5201
   603
        entry = entry->next;
slouken@5201
   604
    }
slouken@5201
   605
    if (entry)
slouken@5201
   606
    {
slouken@6061
   607
        if (rdata->program_cache.head != entry)
slouken@5201
   608
        {
slouken@5201
   609
            if (entry->next)
slouken@5201
   610
                entry->next->prev = entry->prev;
slouken@5201
   611
            if (entry->prev)
slouken@5201
   612
                entry->prev->next = entry->next;
slouken@5201
   613
            entry->prev = NULL;
slouken@5201
   614
            entry->next = rdata->program_cache.head;
slouken@5201
   615
            rdata->program_cache.head->prev = entry;
slouken@5201
   616
            rdata->program_cache.head = entry;
slouken@5201
   617
        }
slouken@5201
   618
        return entry;
slouken@5201
   619
    }
slouken@5201
   620
slouken@5201
   621
    /* Create a program cache entry */
slouken@5201
   622
    entry = (GLES2_ProgramCacheEntry *)SDL_calloc(1, sizeof(GLES2_ProgramCacheEntry));
slouken@5201
   623
    if (!entry)
slouken@5201
   624
    {
slouken@5201
   625
        SDL_OutOfMemory();
slouken@5201
   626
        return NULL;
slouken@5201
   627
    }
slouken@5201
   628
    entry->vertex_shader = vertex;
slouken@5201
   629
    entry->fragment_shader = fragment;
slouken@5201
   630
    entry->blend_mode = blendMode;
slouken@6232
   631
slouken@5201
   632
    /* Create the program and link it */
slouken@6188
   633
    rdata->glGetError();
slouken@6188
   634
    entry->id = rdata->glCreateProgram();
slouken@6188
   635
    rdata->glAttachShader(entry->id, vertex->id);
slouken@6188
   636
    rdata->glAttachShader(entry->id, fragment->id);
slouken@6188
   637
    rdata->glBindAttribLocation(entry->id, GLES2_ATTRIBUTE_POSITION, "a_position");
slouken@6188
   638
    rdata->glBindAttribLocation(entry->id, GLES2_ATTRIBUTE_TEXCOORD, "a_texCoord");
gabomdq@6320
   639
    rdata->glBindAttribLocation(entry->id, GLES2_ATTRIBUTE_ANGLE, "a_angle");
gabomdq@6320
   640
    rdata->glBindAttribLocation(entry->id, GLES2_ATTRIBUTE_CENTER, "a_center");
slouken@6188
   641
    rdata->glLinkProgram(entry->id);
slouken@6188
   642
    rdata->glGetProgramiv(entry->id, GL_LINK_STATUS, &linkSuccessful);
slouken@6188
   643
    if (rdata->glGetError() != GL_NO_ERROR || !linkSuccessful)
slouken@5201
   644
    {
slouken@6188
   645
        rdata->glDeleteProgram(entry->id);
slouken@5201
   646
        SDL_free(entry);
icculus@7037
   647
        SDL_SetError("Failed to link shader program");
slouken@5201
   648
        return NULL;
slouken@5201
   649
    }
slouken@6232
   650
slouken@5201
   651
    /* Predetermine locations of uniform variables */
slouken@5201
   652
    entry->uniform_locations[GLES2_UNIFORM_PROJECTION] =
slouken@6188
   653
        rdata->glGetUniformLocation(entry->id, "u_projection");
slouken@5201
   654
    entry->uniform_locations[GLES2_UNIFORM_TEXTURE] =
slouken@6188
   655
        rdata->glGetUniformLocation(entry->id, "u_texture");
slouken@5201
   656
    entry->uniform_locations[GLES2_UNIFORM_MODULATION] =
slouken@6188
   657
        rdata->glGetUniformLocation(entry->id, "u_modulation");
slouken@5201
   658
    entry->uniform_locations[GLES2_UNIFORM_COLOR] =
slouken@6188
   659
        rdata->glGetUniformLocation(entry->id, "u_color");
slouken@5201
   660
    entry->uniform_locations[GLES2_UNIFORM_COLORTABLE] =
slouken@6188
   661
        rdata->glGetUniformLocation(entry->id, "u_colorTable");
slouken@5201
   662
slouken@5201
   663
    /* Cache the linked program */
slouken@5201
   664
    if (rdata->program_cache.head)
slouken@5201
   665
    {
slouken@5201
   666
        entry->next = rdata->program_cache.head;
slouken@5201
   667
        rdata->program_cache.head->prev = entry;
slouken@5201
   668
    }
slouken@5201
   669
    else
slouken@5201
   670
    {
slouken@5201
   671
        rdata->program_cache.tail = entry;
slouken@5201
   672
    }
slouken@5201
   673
    rdata->program_cache.head = entry;
slouken@5201
   674
    ++rdata->program_cache.count;
slouken@5201
   675
slouken@5201
   676
    /* Increment the refcount of the shaders we're using */
slouken@5201
   677
    ++vertex->references;
slouken@5201
   678
    ++fragment->references;
slouken@5201
   679
slouken@5201
   680
    /* Evict the last entry from the cache if we exceed the limit */
slouken@5201
   681
    if (rdata->program_cache.count > GLES2_MAX_CACHED_PROGRAMS)
slouken@5201
   682
    {
slouken@5201
   683
        shaderEntry = rdata->program_cache.tail->vertex_shader;
slouken@5201
   684
        if (--shaderEntry->references <= 0)
slouken@5201
   685
            GLES2_EvictShader(renderer, shaderEntry);
slouken@5201
   686
        shaderEntry = rdata->program_cache.tail->fragment_shader;
slouken@5201
   687
        if (--shaderEntry->references <= 0)
slouken@5201
   688
            GLES2_EvictShader(renderer, shaderEntry);
slouken@6188
   689
        rdata->glDeleteProgram(rdata->program_cache.tail->id);
slouken@5201
   690
        rdata->program_cache.tail = rdata->program_cache.tail->prev;
slouken@5201
   691
        SDL_free(rdata->program_cache.tail->next);
slouken@5201
   692
        rdata->program_cache.tail->next = NULL;
slouken@5201
   693
        --rdata->program_cache.count;
slouken@5201
   694
    }
slouken@5201
   695
    return entry;
slouken@5201
   696
}
slouken@5201
   697
slouken@5201
   698
static GLES2_ShaderCacheEntry *
slouken@5201
   699
GLES2_CacheShader(SDL_Renderer *renderer, GLES2_ShaderType type, SDL_BlendMode blendMode)
slouken@5201
   700
{
slouken@5201
   701
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   702
    const GLES2_Shader *shader;
slouken@5201
   703
    const GLES2_ShaderInstance *instance = NULL;
slouken@5201
   704
    GLES2_ShaderCacheEntry *entry = NULL;
slouken@5201
   705
    GLint compileSuccessful = GL_FALSE;
slouken@5201
   706
    int i, j;
slouken@5201
   707
slouken@5201
   708
    /* Find the corresponding shader */
slouken@5201
   709
    shader = GLES2_GetShader(type, blendMode);
slouken@5201
   710
    if (!shader)
slouken@5201
   711
    {
slouken@5201
   712
        SDL_SetError("No shader matching the requested characteristics was found");
slouken@5201
   713
        return NULL;
slouken@5201
   714
    }
slouken@6232
   715
slouken@5201
   716
    /* Find a matching shader instance that's supported on this hardware */
slouken@5206
   717
    for (i = 0; i < shader->instance_count && !instance; ++i)
slouken@5201
   718
    {
slouken@5206
   719
        for (j = 0; j < rdata->shader_format_count && !instance; ++j)
slouken@5201
   720
        {
slouken@5201
   721
            if (!shader->instances)
slouken@5201
   722
                continue;
slouken@5206
   723
            if (!shader->instances[i])
slouken@5206
   724
                continue;
slouken@5201
   725
            if (shader->instances[i]->format != rdata->shader_formats[j])
slouken@5201
   726
                continue;
slouken@5201
   727
            instance = shader->instances[i];
slouken@5201
   728
        }
slouken@5201
   729
    }
slouken@5201
   730
    if (!instance)
slouken@5201
   731
    {
slouken@5201
   732
        SDL_SetError("The specified shader cannot be loaded on the current platform");
slouken@5201
   733
        return NULL;
slouken@5201
   734
    }
slouken@5201
   735
slouken@5201
   736
    /* Check if we've already cached this shader */
slouken@5201
   737
    entry = rdata->shader_cache.head;
slouken@5201
   738
    while (entry)
slouken@5201
   739
    {
slouken@5201
   740
        if (entry->instance == instance)
slouken@5201
   741
            break;
slouken@5201
   742
        entry = entry->next;
slouken@5201
   743
    }
slouken@5201
   744
    if (entry)
slouken@5201
   745
        return entry;
slouken@5201
   746
slouken@5201
   747
    /* Create a shader cache entry */
slouken@5201
   748
    entry = (GLES2_ShaderCacheEntry *)SDL_calloc(1, sizeof(GLES2_ShaderCacheEntry));
slouken@5201
   749
    if (!entry)
slouken@5201
   750
    {
slouken@5201
   751
        SDL_OutOfMemory();
slouken@5201
   752
        return NULL;
slouken@5201
   753
    }
slouken@5201
   754
    entry->type = type;
slouken@5201
   755
    entry->instance = instance;
slouken@5201
   756
slouken@5201
   757
    /* Compile or load the selected shader instance */
slouken@6188
   758
    rdata->glGetError();
slouken@6188
   759
    entry->id = rdata->glCreateShader(instance->type);
slouken@5201
   760
    if (instance->format == (GLenum)-1)
slouken@5201
   761
    {
slouken@6188
   762
        rdata->glShaderSource(entry->id, 1, (const char **)&instance->data, NULL);
slouken@6188
   763
        rdata->glCompileShader(entry->id);
slouken@6188
   764
        rdata->glGetShaderiv(entry->id, GL_COMPILE_STATUS, &compileSuccessful);
slouken@5201
   765
    }
slouken@5201
   766
    else
slouken@5201
   767
    {
slouken@6188
   768
        rdata->glShaderBinary(1, &entry->id, instance->format, instance->data, instance->length);
slouken@5201
   769
        compileSuccessful = GL_TRUE;
slouken@5201
   770
    }
slouken@6188
   771
    if (rdata->glGetError() != GL_NO_ERROR || !compileSuccessful)
slouken@5201
   772
    {
slouken@5212
   773
        char *info = NULL;
slouken@6113
   774
        int length = 0;
slouken@5212
   775
slouken@6188
   776
        rdata->glGetShaderiv(entry->id, GL_INFO_LOG_LENGTH, &length);
slouken@5212
   777
        if (length > 0) {
slouken@5212
   778
            info = SDL_stack_alloc(char, length);
slouken@5212
   779
            if (info) {
slouken@6188
   780
                rdata->glGetShaderInfoLog(entry->id, length, &length, info);
slouken@5212
   781
            }
slouken@5212
   782
        }
slouken@5212
   783
        if (info) {
slouken@5212
   784
            SDL_SetError("Failed to load the shader: %s", info);
slouken@5212
   785
            SDL_stack_free(info);
slouken@5212
   786
        } else {
slouken@5212
   787
            SDL_SetError("Failed to load the shader");
slouken@5212
   788
        }
slouken@6188
   789
        rdata->glDeleteShader(entry->id);
slouken@5201
   790
        SDL_free(entry);
slouken@5201
   791
        return NULL;
slouken@5201
   792
    }
slouken@5201
   793
slouken@5201
   794
    /* Link the shader entry in at the front of the cache */
slouken@5201
   795
    if (rdata->shader_cache.head)
slouken@5201
   796
    {
slouken@5201
   797
        entry->next = rdata->shader_cache.head;
slouken@5201
   798
        rdata->shader_cache.head->prev = entry;
slouken@5201
   799
    }
slouken@5201
   800
    rdata->shader_cache.head = entry;
slouken@5201
   801
    ++rdata->shader_cache.count;
slouken@5201
   802
    return entry;
slouken@5201
   803
}
slouken@5201
   804
slouken@5201
   805
static void
slouken@5201
   806
GLES2_EvictShader(SDL_Renderer *renderer, GLES2_ShaderCacheEntry *entry)
slouken@5201
   807
{
slouken@5201
   808
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   809
slouken@5201
   810
    /* Unlink the shader from the cache */
slouken@5201
   811
    if (entry->next)
slouken@5201
   812
        entry->next->prev = entry->prev;
slouken@5201
   813
    if (entry->prev)
slouken@5201
   814
        entry->prev->next = entry->next;
slouken@5201
   815
    if (rdata->shader_cache.head == entry)
slouken@5201
   816
        rdata->shader_cache.head = entry->next;
slouken@5201
   817
    --rdata->shader_cache.count;
slouken@5201
   818
slouken@5201
   819
    /* Deallocate the shader */
slouken@6188
   820
    rdata->glDeleteShader(entry->id);
slouken@5201
   821
    SDL_free(entry);
slouken@5201
   822
}
slouken@5201
   823
slouken@5201
   824
static int
slouken@5201
   825
GLES2_SelectProgram(SDL_Renderer *renderer, GLES2_ImageSource source, SDL_BlendMode blendMode)
slouken@5201
   826
{
slouken@5201
   827
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   828
    GLES2_ShaderCacheEntry *vertex = NULL;
slouken@5201
   829
    GLES2_ShaderCacheEntry *fragment = NULL;
slouken@5201
   830
    GLES2_ShaderType vtype, ftype;
slouken@5201
   831
    GLES2_ProgramCacheEntry *program;
slouken@5201
   832
slouken@5201
   833
    /* Select an appropriate shader pair for the specified modes */
slouken@5201
   834
    vtype = GLES2_SHADER_VERTEX_DEFAULT;
slouken@5201
   835
    switch (source)
slouken@5201
   836
    {
slouken@5201
   837
    case GLES2_IMAGESOURCE_SOLID:
slouken@5201
   838
        ftype = GLES2_SHADER_FRAGMENT_SOLID_SRC;
slouken@5201
   839
        break;
slouken@6113
   840
    case GLES2_IMAGESOURCE_TEXTURE_ABGR:
slouken@6113
   841
        ftype = GLES2_SHADER_FRAGMENT_TEXTURE_ABGR_SRC;
slouken@6341
   842
        break;
slouken@6113
   843
    case GLES2_IMAGESOURCE_TEXTURE_ARGB:
slouken@6113
   844
        ftype = GLES2_SHADER_FRAGMENT_TEXTURE_ARGB_SRC;
slouken@5201
   845
        break;
slouken@6113
   846
    case GLES2_IMAGESOURCE_TEXTURE_RGB:
slouken@6113
   847
        ftype = GLES2_SHADER_FRAGMENT_TEXTURE_RGB_SRC;
slouken@6113
   848
        break;
slouken@6113
   849
    case GLES2_IMAGESOURCE_TEXTURE_BGR:
slouken@6113
   850
        ftype = GLES2_SHADER_FRAGMENT_TEXTURE_BGR_SRC;
slouken@6113
   851
        break;
slouken@6113
   852
    default:
slouken@6113
   853
        goto fault;
slouken@5201
   854
    }
slouken@5201
   855
slouken@5201
   856
    /* Load the requested shaders */
slouken@5201
   857
    vertex = GLES2_CacheShader(renderer, vtype, blendMode);
slouken@5201
   858
    if (!vertex)
slouken@5201
   859
        goto fault;
slouken@5201
   860
    fragment = GLES2_CacheShader(renderer, ftype, blendMode);
slouken@5201
   861
    if (!fragment)
slouken@5201
   862
        goto fault;
slouken@5201
   863
slouken@5201
   864
    /* Check if we need to change programs at all */
slouken@5201
   865
    if (rdata->current_program &&
slouken@5201
   866
        rdata->current_program->vertex_shader == vertex &&
slouken@5201
   867
        rdata->current_program->fragment_shader == fragment)
slouken@5201
   868
        return 0;
slouken@5201
   869
slouken@5201
   870
    /* Generate a matching program */
slouken@5201
   871
    program = GLES2_CacheProgram(renderer, vertex, fragment, blendMode);
slouken@5201
   872
    if (!program)
slouken@5201
   873
        goto fault;
slouken@5201
   874
slouken@5201
   875
    /* Select that program in OpenGL */
slouken@6188
   876
    rdata->glGetError();
slouken@6188
   877
    rdata->glUseProgram(program->id);
slouken@6188
   878
    if (rdata->glGetError() != GL_NO_ERROR)
slouken@5201
   879
    {
slouken@5201
   880
        SDL_SetError("Failed to select program");
slouken@5201
   881
        goto fault;
slouken@5201
   882
    }
slouken@5201
   883
slouken@5201
   884
    /* Set the current program */
slouken@5201
   885
    rdata->current_program = program;
slouken@5201
   886
slouken@5201
   887
    /* Activate an orthographic projection */
slouken@5201
   888
    if (GLES2_SetOrthographicProjection(renderer) < 0)
slouken@5201
   889
        goto fault;
slouken@5201
   890
slouken@5201
   891
    /* Clean up and return */
slouken@5201
   892
    return 0;
slouken@5201
   893
fault:
slouken@5201
   894
    if (vertex && vertex->references <= 0)
slouken@5201
   895
        GLES2_EvictShader(renderer, vertex);
slouken@5201
   896
    if (fragment && fragment->references <= 0)
slouken@5201
   897
        GLES2_EvictShader(renderer, fragment);
slouken@5201
   898
    rdata->current_program = NULL;
slouken@5201
   899
    return -1;
slouken@5201
   900
}
slouken@5201
   901
slouken@5201
   902
static int
slouken@5201
   903
GLES2_SetOrthographicProjection(SDL_Renderer *renderer)
slouken@5201
   904
{
slouken@5201
   905
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
   906
    GLfloat projection[4][4];
slouken@5201
   907
    GLuint locProjection;
slouken@5201
   908
slouken@7239
   909
    if (!renderer->viewport.w || !renderer->viewport.h) {
slouken@7239
   910
        return 0;
slouken@7239
   911
    }
slouken@7239
   912
slouken@5201
   913
    /* Prepare an orthographic projection */
slouken@5297
   914
    projection[0][0] = 2.0f / renderer->viewport.w;
slouken@5201
   915
    projection[0][1] = 0.0f;
slouken@5201
   916
    projection[0][2] = 0.0f;
slouken@5201
   917
    projection[0][3] = 0.0f;
slouken@5201
   918
    projection[1][0] = 0.0f;
slouken@6341
   919
    if (renderer->target) {
slouken@6341
   920
        projection[1][1] = 2.0f / renderer->viewport.h;
slouken@6341
   921
    } else {
slouken@6341
   922
        projection[1][1] = -2.0f / renderer->viewport.h;
slouken@6341
   923
    }
slouken@5201
   924
    projection[1][2] = 0.0f;
slouken@5201
   925
    projection[1][3] = 0.0f;
slouken@5201
   926
    projection[2][0] = 0.0f;
slouken@5201
   927
    projection[2][1] = 0.0f;
slouken@6341
   928
    projection[2][2] = 0.0f;
slouken@5201
   929
    projection[2][3] = 0.0f;
slouken@5201
   930
    projection[3][0] = -1.0f;
slouken@6341
   931
    if (renderer->target) {
slouken@6341
   932
        projection[3][1] = -1.0f;
slouken@6341
   933
    } else {
slouken@6341
   934
        projection[3][1] = 1.0f;
slouken@6341
   935
    }
slouken@5201
   936
    projection[3][2] = 0.0f;
slouken@5201
   937
    projection[3][3] = 1.0f;
slouken@5201
   938
slouken@5201
   939
    /* Set the projection matrix */
slouken@5201
   940
    locProjection = rdata->current_program->uniform_locations[GLES2_UNIFORM_PROJECTION];
slouken@6188
   941
    rdata->glGetError();
slouken@6188
   942
    rdata->glUniformMatrix4fv(locProjection, 1, GL_FALSE, (GLfloat *)projection);
icculus@7037
   943
    if (rdata->glGetError() != GL_NO_ERROR) {
icculus@7037
   944
        return SDL_SetError("Failed to set orthographic projection");
slouken@5201
   945
    }
slouken@5201
   946
    return 0;
slouken@5201
   947
}
slouken@5201
   948
slouken@5201
   949
/*************************************************************************************************
slouken@5201
   950
 * Rendering functions                                                                           *
slouken@5201
   951
 *************************************************************************************************/
slouken@5201
   952
slouken@5224
   953
static const float inv255f = 1.0f / 255.0f;
slouken@5224
   954
slouken@5201
   955
static int GLES2_RenderClear(SDL_Renderer *renderer);
slouken@6528
   956
static int GLES2_RenderDrawPoints(SDL_Renderer *renderer, const SDL_FPoint *points, int count);
slouken@6528
   957
static int GLES2_RenderDrawLines(SDL_Renderer *renderer, const SDL_FPoint *points, int count);
slouken@6528
   958
static int GLES2_RenderFillRects(SDL_Renderer *renderer, const SDL_FRect *rects, int count);
slouken@5201
   959
static int GLES2_RenderCopy(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *srcrect,
slouken@6528
   960
                            const SDL_FRect *dstrect);
gabomdq@6320
   961
static int GLES2_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
slouken@6528
   962
                         const SDL_Rect * srcrect, const SDL_FRect * dstrect,
slouken@6528
   963
                         const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip);
slouken@7141
   964
static int GLES2_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
slouken@7141
   965
                    Uint32 pixel_format, void * pixels, int pitch);
slouken@5201
   966
static void GLES2_RenderPresent(SDL_Renderer *renderer);
slouken@5201
   967
slouken@5333
   968
slouken@5201
   969
static int
slouken@5333
   970
GLES2_RenderClear(SDL_Renderer * renderer)
slouken@5201
   971
{
slouken@6188
   972
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@6188
   973
slouken@5201
   974
    GLES2_ActivateRenderer(renderer);
slouken@6232
   975
slouken@6188
   976
    rdata->glClearColor((GLfloat) renderer->r * inv255f,
slouken@5333
   977
                 (GLfloat) renderer->g * inv255f,
slouken@5333
   978
                 (GLfloat) renderer->b * inv255f,
slouken@5333
   979
                 (GLfloat) renderer->a * inv255f);
slouken@5333
   980
slouken@6188
   981
    rdata->glClear(GL_COLOR_BUFFER_BIT);
slouken@5333
   982
slouken@5201
   983
    return 0;
slouken@5201
   984
}
slouken@5201
   985
slouken@5201
   986
static void
slouken@5355
   987
GLES2_SetBlendMode(GLES2_DriverContext *rdata, int blendMode)
slouken@5201
   988
{
slouken@5355
   989
    if (blendMode != rdata->current.blendMode) {
slouken@5355
   990
        switch (blendMode) {
slouken@5355
   991
        default:
slouken@5355
   992
        case SDL_BLENDMODE_NONE:
slouken@6188
   993
            rdata->glDisable(GL_BLEND);
slouken@5355
   994
            break;
slouken@5355
   995
        case SDL_BLENDMODE_BLEND:
slouken@6188
   996
            rdata->glEnable(GL_BLEND);
slouken@6188
   997
            rdata->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
slouken@5355
   998
            break;
slouken@5355
   999
        case SDL_BLENDMODE_ADD:
slouken@6188
  1000
            rdata->glEnable(GL_BLEND);
slouken@6188
  1001
            rdata->glBlendFunc(GL_SRC_ALPHA, GL_ONE);
slouken@5355
  1002
            break;
slouken@5355
  1003
        case SDL_BLENDMODE_MOD:
slouken@6188
  1004
            rdata->glEnable(GL_BLEND);
slouken@6188
  1005
            rdata->glBlendFunc(GL_ZERO, GL_SRC_COLOR);
slouken@5355
  1006
            break;
slouken@5355
  1007
        }
slouken@5355
  1008
        rdata->current.blendMode = blendMode;
slouken@5201
  1009
    }
slouken@5201
  1010
}
slouken@5201
  1011
slouken@5355
  1012
static void
slouken@5355
  1013
GLES2_SetTexCoords(GLES2_DriverContext * rdata, SDL_bool enabled)
slouken@5355
  1014
{
slouken@5355
  1015
    if (enabled != rdata->current.tex_coords) {
slouken@5355
  1016
        if (enabled) {
slouken@6188
  1017
            rdata->glEnableVertexAttribArray(GLES2_ATTRIBUTE_TEXCOORD);
slouken@5355
  1018
        } else {
slouken@6188
  1019
            rdata->glDisableVertexAttribArray(GLES2_ATTRIBUTE_TEXCOORD);
slouken@5355
  1020
        }
slouken@5355
  1021
        rdata->current.tex_coords = enabled;
slouken@5355
  1022
    }
slouken@5355
  1023
}
slouken@5355
  1024
slouken@5355
  1025
static int
slouken@5355
  1026
GLES2_SetDrawingState(SDL_Renderer * renderer)
slouken@5355
  1027
{
slouken@5355
  1028
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5355
  1029
    int blendMode = renderer->blendMode;
slouken@5355
  1030
    GLuint locColor;
slouken@5355
  1031
slouken@6188
  1032
    rdata->glGetError();
slouken@5355
  1033
slouken@5355
  1034
    GLES2_ActivateRenderer(renderer);
slouken@5355
  1035
slouken@5355
  1036
    GLES2_SetBlendMode(rdata, blendMode);
slouken@5355
  1037
slouken@5355
  1038
    GLES2_SetTexCoords(rdata, SDL_FALSE);
slouken@5355
  1039
slouken@5355
  1040
    /* Activate an appropriate shader and set the projection matrix */
slouken@5355
  1041
    if (GLES2_SelectProgram(renderer, GLES2_IMAGESOURCE_SOLID, blendMode) < 0)
slouken@5355
  1042
        return -1;
slouken@5355
  1043
slouken@5355
  1044
    /* Select the color to draw with */
slouken@5355
  1045
    locColor = rdata->current_program->uniform_locations[GLES2_UNIFORM_COLOR];
slouken@6341
  1046
    if (renderer->target &&
slouken@6341
  1047
        (renderer->target->format == SDL_PIXELFORMAT_ARGB8888 ||
slouken@6341
  1048
         renderer->target->format == SDL_PIXELFORMAT_RGB888)) {
slouken@6341
  1049
        rdata->glUniform4f(locColor,
slouken@6341
  1050
                    renderer->b * inv255f,
slouken@6341
  1051
                    renderer->g * inv255f,
slouken@6341
  1052
                    renderer->r * inv255f,
slouken@6341
  1053
                    renderer->a * inv255f);
slouken@6341
  1054
    } else {
slouken@6341
  1055
        rdata->glUniform4f(locColor,
slouken@6341
  1056
                    renderer->r * inv255f,
slouken@6341
  1057
                    renderer->g * inv255f,
slouken@6341
  1058
                    renderer->b * inv255f,
slouken@6341
  1059
                    renderer->a * inv255f);
slouken@6341
  1060
    }
slouken@5355
  1061
    return 0;
slouken@5355
  1062
}
slouken@5355
  1063
slouken@5201
  1064
static int
slouken@6528
  1065
GLES2_RenderDrawPoints(SDL_Renderer *renderer, const SDL_FPoint *points, int count)
slouken@5201
  1066
{
slouken@6188
  1067
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
  1068
    GLfloat *vertices;
slouken@5201
  1069
    int idx;
slouken@5201
  1070
slouken@5355
  1071
    if (GLES2_SetDrawingState(renderer) < 0) {
slouken@5201
  1072
        return -1;
slouken@5355
  1073
    }
slouken@5201
  1074
slouken@5201
  1075
    /* Emit the specified vertices as points */
slouken@5201
  1076
    vertices = SDL_stack_alloc(GLfloat, count * 2);
icculus@7037
  1077
    for (idx = 0; idx < count; ++idx) {
slouken@6528
  1078
        GLfloat x = points[idx].x + 0.5f;
slouken@6528
  1079
        GLfloat y = points[idx].y + 0.5f;
slouken@5201
  1080
slouken@5201
  1081
        vertices[idx * 2] = x;
slouken@5201
  1082
        vertices[(idx * 2) + 1] = y;
slouken@5201
  1083
    }
slouken@6188
  1084
    rdata->glGetError();
slouken@6188
  1085
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
slouken@6188
  1086
    rdata->glDrawArrays(GL_POINTS, 0, count);
slouken@5201
  1087
    SDL_stack_free(vertices);
icculus@7037
  1088
    if (rdata->glGetError() != GL_NO_ERROR) {
icculus@7037
  1089
        return SDL_SetError("Failed to render lines");
slouken@5201
  1090
    }
slouken@5201
  1091
    return 0;
slouken@5201
  1092
}
slouken@5201
  1093
slouken@5201
  1094
static int
slouken@6528
  1095
GLES2_RenderDrawLines(SDL_Renderer *renderer, const SDL_FPoint *points, int count)
slouken@5201
  1096
{
slouken@6188
  1097
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
  1098
    GLfloat *vertices;
slouken@5201
  1099
    int idx;
slouken@5201
  1100
slouken@5355
  1101
    if (GLES2_SetDrawingState(renderer) < 0) {
slouken@5201
  1102
        return -1;
slouken@5355
  1103
    }
slouken@5201
  1104
slouken@5201
  1105
    /* Emit a line strip including the specified vertices */
slouken@5201
  1106
    vertices = SDL_stack_alloc(GLfloat, count * 2);
icculus@7037
  1107
    for (idx = 0; idx < count; ++idx) {
slouken@6528
  1108
        GLfloat x = points[idx].x + 0.5f;
slouken@6528
  1109
        GLfloat y = points[idx].y + 0.5f;
slouken@5201
  1110
slouken@5201
  1111
        vertices[idx * 2] = x;
slouken@5201
  1112
        vertices[(idx * 2) + 1] = y;
slouken@5201
  1113
    }
slouken@6188
  1114
    rdata->glGetError();
slouken@6188
  1115
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
slouken@6188
  1116
    rdata->glDrawArrays(GL_LINE_STRIP, 0, count);
slouken@6076
  1117
slouken@6076
  1118
    /* We need to close the endpoint of the line */
slouken@6076
  1119
    if (count == 2 ||
slouken@6076
  1120
        points[0].x != points[count-1].x || points[0].y != points[count-1].y) {
slouken@6188
  1121
        rdata->glDrawArrays(GL_POINTS, count-1, 1);
slouken@6076
  1122
    }
slouken@5201
  1123
    SDL_stack_free(vertices);
icculus@7037
  1124
    if (rdata->glGetError() != GL_NO_ERROR) {
icculus@7037
  1125
        return SDL_SetError("Failed to render lines");
slouken@5201
  1126
    }
slouken@5201
  1127
    return 0;
slouken@5201
  1128
}
slouken@5201
  1129
slouken@5201
  1130
static int
slouken@6528
  1131
GLES2_RenderFillRects(SDL_Renderer *renderer, const SDL_FRect *rects, int count)
slouken@5201
  1132
{
slouken@6188
  1133
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
  1134
    GLfloat vertices[8];
slouken@5201
  1135
    int idx;
slouken@5201
  1136
slouken@5355
  1137
    if (GLES2_SetDrawingState(renderer) < 0) {
slouken@5201
  1138
        return -1;
slouken@5355
  1139
    }
slouken@5201
  1140
slouken@5201
  1141
    /* Emit a line loop for each rectangle */
slouken@6188
  1142
    rdata->glGetError();
slouken@5297
  1143
    for (idx = 0; idx < count; ++idx) {
slouken@6528
  1144
        const SDL_FRect *rect = &rects[idx];
slouken@5297
  1145
slouken@6528
  1146
        GLfloat xMin = rect->x;
slouken@6528
  1147
        GLfloat xMax = (rect->x + rect->w);
slouken@6528
  1148
        GLfloat yMin = rect->y;
slouken@6528
  1149
        GLfloat yMax = (rect->y + rect->h);
slouken@5201
  1150
slouken@5201
  1151
        vertices[0] = xMin;
slouken@5201
  1152
        vertices[1] = yMin;
slouken@5201
  1153
        vertices[2] = xMax;
slouken@5201
  1154
        vertices[3] = yMin;
slouken@5201
  1155
        vertices[4] = xMin;
slouken@5201
  1156
        vertices[5] = yMax;
slouken@5201
  1157
        vertices[6] = xMax;
slouken@5201
  1158
        vertices[7] = yMax;
slouken@6188
  1159
        rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
slouken@6188
  1160
        rdata->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
slouken@5201
  1161
    }
icculus@7037
  1162
    if (rdata->glGetError() != GL_NO_ERROR) {
icculus@7037
  1163
        return SDL_SetError("Failed to render lines");
slouken@5201
  1164
    }
slouken@5201
  1165
    return 0;
slouken@5201
  1166
}
slouken@5201
  1167
slouken@5201
  1168
static int
slouken@5201
  1169
GLES2_RenderCopy(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *srcrect,
slouken@6528
  1170
                 const SDL_FRect *dstrect)
slouken@5201
  1171
{
slouken@5201
  1172
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@5201
  1173
    GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
slouken@5201
  1174
    GLES2_ImageSource sourceType;
slouken@5201
  1175
    SDL_BlendMode blendMode;
slouken@5201
  1176
    GLfloat vertices[8];
slouken@5201
  1177
    GLfloat texCoords[8];
slouken@5201
  1178
    GLuint locTexture;
slouken@5201
  1179
    GLuint locModulation;
slouken@5201
  1180
slouken@5201
  1181
    GLES2_ActivateRenderer(renderer);
slouken@5201
  1182
slouken@5201
  1183
    /* Activate an appropriate shader and set the projection matrix */
slouken@5201
  1184
    blendMode = texture->blendMode;
slouken@6246
  1185
    if (renderer->target) {
slouken@6232
  1186
        /* Check if we need to do color mapping between the source and render target textures */
slouken@6246
  1187
        if (renderer->target->format != texture->format) {
slouken@6232
  1188
            switch (texture->format)
slouken@6232
  1189
            {
slouken@6232
  1190
            case SDL_PIXELFORMAT_ABGR8888:
slouken@6246
  1191
                switch (renderer->target->format)
slouken@6232
  1192
                {
slouken@6232
  1193
                    case SDL_PIXELFORMAT_ARGB8888:
slouken@6232
  1194
                    case SDL_PIXELFORMAT_RGB888:
slouken@6232
  1195
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
slouken@6232
  1196
                        break;
slouken@6232
  1197
                    case SDL_PIXELFORMAT_BGR888:
slouken@6232
  1198
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;
slouken@6232
  1199
                        break;
slouken@6232
  1200
                }
slouken@6232
  1201
                break;
slouken@6232
  1202
            case SDL_PIXELFORMAT_ARGB8888:
slouken@6246
  1203
                switch (renderer->target->format)
slouken@6232
  1204
                {
slouken@6232
  1205
                    case SDL_PIXELFORMAT_ABGR8888:
slouken@6232
  1206
                    case SDL_PIXELFORMAT_BGR888:
slouken@6232
  1207
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
slouken@6232
  1208
                        break;
slouken@6232
  1209
                    case SDL_PIXELFORMAT_RGB888:
slouken@6232
  1210
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;
slouken@6232
  1211
                        break;
slouken@6232
  1212
                }
slouken@6232
  1213
                break;
slouken@6232
  1214
            case SDL_PIXELFORMAT_BGR888:
slouken@6246
  1215
                switch (renderer->target->format)
slouken@6232
  1216
                {
slouken@6232
  1217
                    case SDL_PIXELFORMAT_ABGR8888:
slouken@6232
  1218
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_BGR;
slouken@6232
  1219
                        break;
slouken@6232
  1220
                    case SDL_PIXELFORMAT_ARGB8888:
slouken@6232
  1221
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_RGB;
slouken@6232
  1222
                        break;
slouken@6232
  1223
                    case SDL_PIXELFORMAT_RGB888:
slouken@6232
  1224
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
slouken@6232
  1225
                        break;
slouken@6232
  1226
                }
slouken@6232
  1227
                break;
slouken@6232
  1228
            case SDL_PIXELFORMAT_RGB888:
slouken@6246
  1229
                switch (renderer->target->format)
slouken@6232
  1230
                {
slouken@6232
  1231
                    case SDL_PIXELFORMAT_ABGR8888:
slouken@6232
  1232
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
slouken@6232
  1233
                        break;
slouken@6232
  1234
                    case SDL_PIXELFORMAT_ARGB8888:
slouken@6232
  1235
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_BGR;
slouken@6232
  1236
                        break;
slouken@6232
  1237
                    case SDL_PIXELFORMAT_BGR888:
slouken@6232
  1238
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
slouken@6232
  1239
                        break;
slouken@6232
  1240
                }
slouken@6232
  1241
                break;
slouken@6232
  1242
            }
slouken@6232
  1243
        }
slouken@7191
  1244
        else sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;   /* Texture formats match, use the non color mapping shader (even if the formats are not ABGR) */
slouken@6232
  1245
    }
slouken@6232
  1246
    else {
slouken@6232
  1247
        switch (texture->format)
slouken@6232
  1248
        {
slouken@6232
  1249
            case SDL_PIXELFORMAT_ABGR8888:
slouken@6232
  1250
                sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;
slouken@6232
  1251
                break;
slouken@6232
  1252
            case SDL_PIXELFORMAT_ARGB8888:
slouken@6232
  1253
                sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
slouken@6232
  1254
                break;
slouken@6232
  1255
            case SDL_PIXELFORMAT_BGR888:
slouken@6232
  1256
                sourceType = GLES2_IMAGESOURCE_TEXTURE_BGR;
slouken@6232
  1257
                break;
slouken@6232
  1258
            case SDL_PIXELFORMAT_RGB888:
slouken@6232
  1259
                sourceType = GLES2_IMAGESOURCE_TEXTURE_RGB;
slouken@6232
  1260
                break;
slouken@6928
  1261
            default:
slouken@6928
  1262
                return -1;
slouken@6232
  1263
        }
slouken@6113
  1264
    }
slouken@5201
  1265
    if (GLES2_SelectProgram(renderer, sourceType, blendMode) < 0)
slouken@5201
  1266
        return -1;
slouken@5201
  1267
slouken@5201
  1268
    /* Select the target texture */
slouken@5201
  1269
    locTexture = rdata->current_program->uniform_locations[GLES2_UNIFORM_TEXTURE];
slouken@6188
  1270
    rdata->glGetError();
slouken@6341
  1271
    rdata->glActiveTexture(GL_TEXTURE0);
gabomdq@6320
  1272
    rdata->glBindTexture(tdata->texture_type, tdata->texture);
gabomdq@6320
  1273
    rdata->glUniform1i(locTexture, 0);
gabomdq@6320
  1274
gabomdq@6320
  1275
    /* Configure color modulation */
gabomdq@6320
  1276
    locModulation = rdata->current_program->uniform_locations[GLES2_UNIFORM_MODULATION];
slouken@6341
  1277
    if (renderer->target &&
slouken@6341
  1278
        (renderer->target->format == SDL_PIXELFORMAT_ARGB8888 ||
slouken@6341
  1279
         renderer->target->format == SDL_PIXELFORMAT_RGB888)) {
slouken@6341
  1280
        rdata->glUniform4f(locModulation,
slouken@6341
  1281
                    texture->b * inv255f,
slouken@6341
  1282
                    texture->g * inv255f,
slouken@6341
  1283
                    texture->r * inv255f,
slouken@6341
  1284
                    texture->a * inv255f);
slouken@6341
  1285
    } else {
slouken@6341
  1286
        rdata->glUniform4f(locModulation,
slouken@6341
  1287
                    texture->r * inv255f,
slouken@6341
  1288
                    texture->g * inv255f,
slouken@6341
  1289
                    texture->b * inv255f,
slouken@6341
  1290
                    texture->a * inv255f);
slouken@6341
  1291
    }
gabomdq@6320
  1292
gabomdq@6320
  1293
    /* Configure texture blending */
gabomdq@6320
  1294
    GLES2_SetBlendMode(rdata, blendMode);
gabomdq@6320
  1295
gabomdq@6320
  1296
    GLES2_SetTexCoords(rdata, SDL_TRUE);
gabomdq@6320
  1297
gabomdq@6320
  1298
    /* Emit the textured quad */
slouken@6528
  1299
    vertices[0] = dstrect->x;
slouken@6528
  1300
    vertices[1] = dstrect->y;
slouken@6528
  1301
    vertices[2] = (dstrect->x + dstrect->w);
slouken@6528
  1302
    vertices[3] = dstrect->y;
slouken@6528
  1303
    vertices[4] = dstrect->x;
slouken@6528
  1304
    vertices[5] = (dstrect->y + dstrect->h);
slouken@6528
  1305
    vertices[6] = (dstrect->x + dstrect->w);
slouken@6528
  1306
    vertices[7] = (dstrect->y + dstrect->h);
gabomdq@6320
  1307
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
gabomdq@6320
  1308
    texCoords[0] = srcrect->x / (GLfloat)texture->w;
gabomdq@6320
  1309
    texCoords[1] = srcrect->y / (GLfloat)texture->h;
gabomdq@6320
  1310
    texCoords[2] = (srcrect->x + srcrect->w) / (GLfloat)texture->w;
gabomdq@6320
  1311
    texCoords[3] = srcrect->y / (GLfloat)texture->h;
gabomdq@6320
  1312
    texCoords[4] = srcrect->x / (GLfloat)texture->w;
gabomdq@6320
  1313
    texCoords[5] = (srcrect->y + srcrect->h) / (GLfloat)texture->h;
gabomdq@6320
  1314
    texCoords[6] = (srcrect->x + srcrect->w) / (GLfloat)texture->w;
gabomdq@6320
  1315
    texCoords[7] = (srcrect->y + srcrect->h) / (GLfloat)texture->h;
gabomdq@6320
  1316
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_TEXCOORD, 2, GL_FLOAT, GL_FALSE, 0, texCoords);
gabomdq@6320
  1317
    rdata->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
icculus@7037
  1318
    if (rdata->glGetError() != GL_NO_ERROR) {
icculus@7037
  1319
        return SDL_SetError("Failed to render texture");
gabomdq@6320
  1320
    }
gabomdq@6320
  1321
    return 0;
gabomdq@6320
  1322
}
gabomdq@6320
  1323
gabomdq@6320
  1324
static int
gabomdq@6320
  1325
GLES2_RenderCopyEx(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *srcrect,
slouken@6528
  1326
                 const SDL_FRect *dstrect, const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip)
gabomdq@6320
  1327
{
gabomdq@6320
  1328
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
gabomdq@6320
  1329
    GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
gabomdq@6320
  1330
    GLES2_ImageSource sourceType;
gabomdq@6320
  1331
    SDL_BlendMode blendMode;
gabomdq@6320
  1332
    GLfloat vertices[8];
gabomdq@6320
  1333
    GLfloat texCoords[8];
gabomdq@6320
  1334
    GLuint locTexture;
gabomdq@6320
  1335
    GLuint locModulation;
gabomdq@6320
  1336
    GLfloat translate[8];
gabomdq@6320
  1337
    GLfloat fAngle[4];
gabomdq@6320
  1338
    GLfloat tmp;
gabomdq@6320
  1339
gabomdq@6320
  1340
    GLES2_ActivateRenderer(renderer);
slouken@7191
  1341
gabomdq@6320
  1342
    rdata->glEnableVertexAttribArray(GLES2_ATTRIBUTE_CENTER);
gabomdq@6320
  1343
    rdata->glEnableVertexAttribArray(GLES2_ATTRIBUTE_ANGLE);
slouken@6825
  1344
    fAngle[0] = fAngle[1] = fAngle[2] = fAngle[3] = (GLfloat)(360.0f - angle);
gabomdq@6320
  1345
    /* Calculate the center of rotation */
slouken@6528
  1346
    translate[0] = translate[2] = translate[4] = translate[6] = (center->x + dstrect->x);
slouken@6528
  1347
    translate[1] = translate[3] = translate[5] = translate[7] = (center->y + dstrect->y);
gabomdq@6320
  1348
gabomdq@6320
  1349
    /* Activate an appropriate shader and set the projection matrix */
gabomdq@6320
  1350
    blendMode = texture->blendMode;
gabomdq@6320
  1351
    if (renderer->target) {
gabomdq@6320
  1352
        /* Check if we need to do color mapping between the source and render target textures */
gabomdq@6320
  1353
        if (renderer->target->format != texture->format) {
gabomdq@6320
  1354
            switch (texture->format)
gabomdq@6320
  1355
            {
gabomdq@6320
  1356
            case SDL_PIXELFORMAT_ABGR8888:
gabomdq@6320
  1357
                switch (renderer->target->format)
gabomdq@6320
  1358
                {
gabomdq@6320
  1359
                    case SDL_PIXELFORMAT_ARGB8888:
gabomdq@6320
  1360
                    case SDL_PIXELFORMAT_RGB888:
gabomdq@6320
  1361
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
gabomdq@6320
  1362
                        break;
gabomdq@6320
  1363
                    case SDL_PIXELFORMAT_BGR888:
gabomdq@6320
  1364
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;
gabomdq@6320
  1365
                        break;
gabomdq@6320
  1366
                }
gabomdq@6320
  1367
                break;
gabomdq@6320
  1368
            case SDL_PIXELFORMAT_ARGB8888:
gabomdq@6320
  1369
                switch (renderer->target->format)
gabomdq@6320
  1370
                {
gabomdq@6320
  1371
                    case SDL_PIXELFORMAT_ABGR8888:
gabomdq@6320
  1372
                    case SDL_PIXELFORMAT_BGR888:
gabomdq@6320
  1373
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
gabomdq@6320
  1374
                        break;
gabomdq@6320
  1375
                    case SDL_PIXELFORMAT_RGB888:
gabomdq@6320
  1376
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;
gabomdq@6320
  1377
                        break;
gabomdq@6320
  1378
                }
gabomdq@6320
  1379
                break;
gabomdq@6320
  1380
            case SDL_PIXELFORMAT_BGR888:
gabomdq@6320
  1381
                switch (renderer->target->format)
gabomdq@6320
  1382
                {
gabomdq@6320
  1383
                    case SDL_PIXELFORMAT_ABGR8888:
gabomdq@6320
  1384
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_BGR;
gabomdq@6320
  1385
                        break;
gabomdq@6320
  1386
                    case SDL_PIXELFORMAT_ARGB8888:
gabomdq@6320
  1387
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_RGB;
gabomdq@6320
  1388
                        break;
gabomdq@6320
  1389
                    case SDL_PIXELFORMAT_RGB888:
gabomdq@6320
  1390
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
gabomdq@6320
  1391
                        break;
gabomdq@6320
  1392
                }
gabomdq@6320
  1393
                break;
gabomdq@6320
  1394
            case SDL_PIXELFORMAT_RGB888:
gabomdq@6320
  1395
                switch (renderer->target->format)
gabomdq@6320
  1396
                {
gabomdq@6320
  1397
                    case SDL_PIXELFORMAT_ABGR8888:
gabomdq@6320
  1398
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
gabomdq@6320
  1399
                        break;
gabomdq@6320
  1400
                    case SDL_PIXELFORMAT_ARGB8888:
gabomdq@6320
  1401
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_BGR;
gabomdq@6320
  1402
                        break;
gabomdq@6320
  1403
                    case SDL_PIXELFORMAT_BGR888:
gabomdq@6320
  1404
                        sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
gabomdq@6320
  1405
                        break;
gabomdq@6320
  1406
                }
gabomdq@6320
  1407
                break;
gabomdq@6320
  1408
            }
gabomdq@6320
  1409
        }
slouken@7191
  1410
        else sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;   /* Texture formats match, use the non color mapping shader (even if the formats are not ABGR) */
gabomdq@6320
  1411
    }
gabomdq@6320
  1412
    else {
gabomdq@6320
  1413
        switch (texture->format)
gabomdq@6320
  1414
        {
gabomdq@6320
  1415
            case SDL_PIXELFORMAT_ABGR8888:
gabomdq@6320
  1416
                sourceType = GLES2_IMAGESOURCE_TEXTURE_ABGR;
gabomdq@6320
  1417
                break;
gabomdq@6320
  1418
            case SDL_PIXELFORMAT_ARGB8888:
gabomdq@6320
  1419
                sourceType = GLES2_IMAGESOURCE_TEXTURE_ARGB;
gabomdq@6320
  1420
                break;
gabomdq@6320
  1421
            case SDL_PIXELFORMAT_BGR888:
gabomdq@6320
  1422
                sourceType = GLES2_IMAGESOURCE_TEXTURE_BGR;
gabomdq@6320
  1423
                break;
gabomdq@6320
  1424
            case SDL_PIXELFORMAT_RGB888:
gabomdq@6320
  1425
                sourceType = GLES2_IMAGESOURCE_TEXTURE_RGB;
gabomdq@6320
  1426
                break;
slouken@6928
  1427
            default:
slouken@6928
  1428
                return -1;
gabomdq@6320
  1429
        }
gabomdq@6320
  1430
    }
gabomdq@6320
  1431
    if (GLES2_SelectProgram(renderer, sourceType, blendMode) < 0)
gabomdq@6320
  1432
        return -1;
gabomdq@6320
  1433
gabomdq@6320
  1434
    /* Select the target texture */
gabomdq@6320
  1435
    locTexture = rdata->current_program->uniform_locations[GLES2_UNIFORM_TEXTURE];
gabomdq@6320
  1436
    rdata->glGetError();
slouken@6188
  1437
    rdata->glActiveTexture(GL_TEXTURE0);
slouken@6188
  1438
    rdata->glBindTexture(tdata->texture_type, tdata->texture);
slouken@6188
  1439
    rdata->glUniform1i(locTexture, 0);
slouken@5201
  1440
slouken@5201
  1441
    /* Configure color modulation */
slouken@5201
  1442
    locModulation = rdata->current_program->uniform_locations[GLES2_UNIFORM_MODULATION];
slouken@6341
  1443
    if (renderer->target &&
slouken@6341
  1444
        (renderer->target->format == SDL_PIXELFORMAT_ARGB8888 ||
slouken@6341
  1445
         renderer->target->format == SDL_PIXELFORMAT_RGB888)) {
slouken@6341
  1446
        rdata->glUniform4f(locModulation,
slouken@6341
  1447
                    texture->b * inv255f,
slouken@6341
  1448
                    texture->g * inv255f,
slouken@6341
  1449
                    texture->r * inv255f,
slouken@6341
  1450
                    texture->a * inv255f);
slouken@6341
  1451
    } else {
slouken@6341
  1452
        rdata->glUniform4f(locModulation,
slouken@6341
  1453
                    texture->r * inv255f,
slouken@6341
  1454
                    texture->g * inv255f,
slouken@6341
  1455
                    texture->b * inv255f,
slouken@6341
  1456
                    texture->a * inv255f);
slouken@6341
  1457
    }
slouken@5355
  1458
slouken@5355
  1459
    /* Configure texture blending */
slouken@5355
  1460
    GLES2_SetBlendMode(rdata, blendMode);
slouken@5355
  1461
slouken@5355
  1462
    GLES2_SetTexCoords(rdata, SDL_TRUE);
slouken@5201
  1463
slouken@5201
  1464
    /* Emit the textured quad */
slouken@6528
  1465
    vertices[0] = dstrect->x;
slouken@6528
  1466
    vertices[1] = dstrect->y;
slouken@6528
  1467
    vertices[2] = (dstrect->x + dstrect->w);
slouken@6528
  1468
    vertices[3] = dstrect->y;
slouken@6528
  1469
    vertices[4] = dstrect->x;
slouken@6528
  1470
    vertices[5] = (dstrect->y + dstrect->h);
slouken@6528
  1471
    vertices[6] = (dstrect->x + dstrect->w);
slouken@6528
  1472
    vertices[7] = (dstrect->y + dstrect->h);
gabomdq@6320
  1473
    if (flip & SDL_FLIP_HORIZONTAL) {
gabomdq@6320
  1474
        tmp = vertices[0];
gabomdq@6320
  1475
        vertices[0] = vertices[4] = vertices[2];
gabomdq@6320
  1476
        vertices[2] = vertices[6] = tmp;
gabomdq@6320
  1477
    }
gabomdq@6320
  1478
    if (flip & SDL_FLIP_VERTICAL) {
gabomdq@6320
  1479
        tmp = vertices[1];
gabomdq@6320
  1480
        vertices[1] = vertices[3] = vertices[5];
gabomdq@6320
  1481
        vertices[5] = vertices[7] = tmp;
gabomdq@6320
  1482
    }
slouken@7191
  1483
gabomdq@6320
  1484
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_ANGLE, 1, GL_FLOAT, GL_FALSE, 0, &fAngle);
gabomdq@6320
  1485
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_CENTER, 2, GL_FLOAT, GL_FALSE, 0, translate);
slouken@6188
  1486
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
slouken@6232
  1487
slouken@5201
  1488
    texCoords[0] = srcrect->x / (GLfloat)texture->w;
slouken@5201
  1489
    texCoords[1] = srcrect->y / (GLfloat)texture->h;
slouken@5201
  1490
    texCoords[2] = (srcrect->x + srcrect->w) / (GLfloat)texture->w;
slouken@5201
  1491
    texCoords[3] = srcrect->y / (GLfloat)texture->h;
slouken@5201
  1492
    texCoords[4] = srcrect->x / (GLfloat)texture->w;
slouken@5201
  1493
    texCoords[5] = (srcrect->y + srcrect->h) / (GLfloat)texture->h;
slouken@5201
  1494
    texCoords[6] = (srcrect->x + srcrect->w) / (GLfloat)texture->w;
slouken@5201
  1495
    texCoords[7] = (srcrect->y + srcrect->h) / (GLfloat)texture->h;
slouken@6188
  1496
    rdata->glVertexAttribPointer(GLES2_ATTRIBUTE_TEXCOORD, 2, GL_FLOAT, GL_FALSE, 0, texCoords);
slouken@6188
  1497
    rdata->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
gabomdq@6320
  1498
    rdata->glDisableVertexAttribArray(GLES2_ATTRIBUTE_CENTER);
gabomdq@6320
  1499
    rdata->glDisableVertexAttribArray(GLES2_ATTRIBUTE_ANGLE);
icculus@7037
  1500
    if (rdata->glGetError() != GL_NO_ERROR) {
icculus@7037
  1501
        return SDL_SetError("Failed to render texture");
slouken@5201
  1502
    }
slouken@5201
  1503
    return 0;
slouken@5201
  1504
}
slouken@5201
  1505
slouken@6042
  1506
static int
slouken@6042
  1507
GLES2_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
slouken@6042
  1508
                    Uint32 pixel_format, void * pixels, int pitch)
slouken@6042
  1509
{
slouken@6188
  1510
    GLES2_DriverContext *rdata = (GLES2_DriverContext *)renderer->driverdata;
slouken@6042
  1511
    SDL_Window *window = renderer->window;
slouken@6042
  1512
    Uint32 temp_format = SDL_PIXELFORMAT_ABGR8888;
slouken@6042
  1513
    void *temp_pixels;
slouken@6042
  1514
    int temp_pitch;
slouken@6042
  1515
    Uint8 *src, *dst, *tmp;
slouken@6042
  1516
    int w, h, length, rows;
slouken@6042
  1517
    int status;
slouken@6042
  1518
slouken@6042
  1519
    GLES2_ActivateRenderer(renderer);
slouken@6042
  1520
slouken@6042
  1521
    temp_pitch = rect->w * SDL_BYTESPERPIXEL(temp_format);
slouken@6042
  1522
    temp_pixels = SDL_malloc(rect->h * temp_pitch);
slouken@6042
  1523
    if (!temp_pixels) {
icculus@7037
  1524
        return SDL_OutOfMemory();
slouken@6042
  1525
    }
slouken@6042
  1526
slouken@6042
  1527
    SDL_GetWindowSize(window, &w, &h);
slouken@6042
  1528
slouken@6188
  1529
    rdata->glPixelStorei(GL_PACK_ALIGNMENT, 1);
slouken@6042
  1530
slouken@6188
  1531
    rdata->glReadPixels(rect->x, (h-rect->y)-rect->h, rect->w, rect->h,
slouken@6042
  1532
                       GL_RGBA, GL_UNSIGNED_BYTE, temp_pixels);
slouken@6042
  1533
slouken@6042
  1534
    /* Flip the rows to be top-down */
slouken@6042
  1535
    length = rect->w * SDL_BYTESPERPIXEL(temp_format);
slouken@6042
  1536
    src = (Uint8*)temp_pixels + (rect->h-1)*temp_pitch;
slouken@6042
  1537
    dst = (Uint8*)temp_pixels;
slouken@6042
  1538
    tmp = SDL_stack_alloc(Uint8, length);
slouken@6042
  1539
    rows = rect->h / 2;
slouken@6042
  1540
    while (rows--) {
slouken@6042
  1541
        SDL_memcpy(tmp, dst, length);
slouken@6042
  1542
        SDL_memcpy(dst, src, length);
slouken@6042
  1543
        SDL_memcpy(src, tmp, length);
slouken@6042
  1544
        dst += temp_pitch;
slouken@6042
  1545
        src -= temp_pitch;
slouken@6042
  1546
    }
slouken@6042
  1547
    SDL_stack_free(tmp);
slouken@6042
  1548
slouken@6042
  1549
    status = SDL_ConvertPixels(rect->w, rect->h,
slouken@6042
  1550
                               temp_format, temp_pixels, temp_pitch,
slouken@6042
  1551
                               pixel_format, pixels, pitch);
slouken@6042
  1552
    SDL_free(temp_pixels);
slouken@6042
  1553
slouken@6042
  1554
    return status;
slouken@6042
  1555
}
slouken@6042
  1556
slouken@5201
  1557
static void
slouken@5201
  1558
GLES2_RenderPresent(SDL_Renderer *renderer)
slouken@5201
  1559
{
slouken@5201
  1560
    GLES2_ActivateRenderer(renderer);
slouken@5201
  1561
slouken@5201
  1562
    /* Tell the video driver to swap buffers */
slouken@5201
  1563
    SDL_GL_SwapWindow(renderer->window);
slouken@5201
  1564
}
slouken@5201
  1565
gabomdq@6414
  1566
gabomdq@6414
  1567
/*************************************************************************************************
gabomdq@6414
  1568
 * Bind/unbinding of textures
gabomdq@6414
  1569
 *************************************************************************************************/
gabomdq@6414
  1570
static int GLES2_BindTexture (SDL_Renderer * renderer, SDL_Texture *texture, float *texw, float *texh);
gabomdq@6414
  1571
static int GLES2_UnbindTexture (SDL_Renderer * renderer, SDL_Texture *texture);
gabomdq@6414
  1572
gabomdq@6414
  1573
static int GLES2_BindTexture (SDL_Renderer * renderer, SDL_Texture *texture, float *texw, float *texh) {
gabomdq@6414
  1574
    GLES2_DriverContext *data = (GLES2_DriverContext *)renderer->driverdata;
gabomdq@6414
  1575
    GLES2_TextureData *texturedata = (GLES2_TextureData *)texture->driverdata;
gabomdq@6414
  1576
    GLES2_ActivateRenderer(renderer);
gabomdq@6414
  1577
gabomdq@6414
  1578
    data->glBindTexture(texturedata->texture_type, texturedata->texture);
gabomdq@6414
  1579
gabomdq@6414
  1580
    if(texw) *texw = 1.0;
gabomdq@6414
  1581
    if(texh) *texh = 1.0;
gabomdq@6414
  1582
gabomdq@6414
  1583
    return 0;
gabomdq@6414
  1584
}
gabomdq@6414
  1585
gabomdq@6414
  1586
static int GLES2_UnbindTexture (SDL_Renderer * renderer, SDL_Texture *texture) {
gabomdq@6414
  1587
    GLES2_DriverContext *data = (GLES2_DriverContext *)renderer->driverdata;
gabomdq@6414
  1588
    GLES2_TextureData *texturedata = (GLES2_TextureData *)texture->driverdata;
gabomdq@6414
  1589
    GLES2_ActivateRenderer(renderer);
gabomdq@6414
  1590
icculus@7075
  1591
    data->glBindTexture(texturedata->texture_type, 0);
gabomdq@6414
  1592
gabomdq@6414
  1593
    return 0;
gabomdq@6414
  1594
}
gabomdq@6414
  1595
gabomdq@6414
  1596
slouken@5201
  1597
/*************************************************************************************************
slouken@5201
  1598
 * Renderer instantiation                                                                        *
slouken@5201
  1599
 *************************************************************************************************/
slouken@5201
  1600
slouken@5201
  1601
#define GL_NVIDIA_PLATFORM_BINARY_NV 0x890B
slouken@5201
  1602
slouken@5355
  1603
static void
slouken@5355
  1604
GLES2_ResetState(SDL_Renderer *renderer)
slouken@5355
  1605
{
slouken@5355
  1606
    GLES2_DriverContext *rdata = (GLES2_DriverContext *) renderer->driverdata;
slouken@5355
  1607
slouken@5355
  1608
    if (SDL_CurrentContext == rdata->context) {
slouken@5355
  1609
        GLES2_UpdateViewport(renderer);
slouken@5355
  1610
    } else {
slouken@5355
  1611
        GLES2_ActivateRenderer(renderer);
slouken@5355
  1612
    }
slouken@5355
  1613
slouken@5355
  1614
    rdata->current.blendMode = -1;
slouken@5355
  1615
    rdata->current.tex_coords = SDL_FALSE;
slouken@5355
  1616
slouken@6188
  1617
    rdata->glEnableVertexAttribArray(GLES2_ATTRIBUTE_POSITION);
slouken@6188
  1618
    rdata->glDisableVertexAttribArray(GLES2_ATTRIBUTE_TEXCOORD);
slouken@5355
  1619
}
slouken@5355
  1620
slouken@5201
  1621
static SDL_Renderer *
slouken@5201
  1622
GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
slouken@5201
  1623
{
slouken@5201
  1624
    SDL_Renderer *renderer;
slouken@5201
  1625
    GLES2_DriverContext *rdata;
slouken@5201
  1626
    GLint nFormats;
slouken@5201
  1627
#ifndef ZUNE_HD
slouken@5201
  1628
    GLboolean hasCompiler;
slouken@5201
  1629
#endif
slouken@6188
  1630
    Uint32 windowFlags;
slouken@6271
  1631
    GLint window_framebuffer;
slouken@6232
  1632
slouken@6371
  1633
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_EGL, 1);
slouken@6188
  1634
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
slouken@6188
  1635
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
slouken@6232
  1636
slouken@6188
  1637
    windowFlags = SDL_GetWindowFlags(window);
slouken@6188
  1638
    if (!(windowFlags & SDL_WINDOW_OPENGL)) {
slouken@6188
  1639
        if (SDL_RecreateWindow(window, windowFlags | SDL_WINDOW_OPENGL) < 0) {
slouken@6188
  1640
            /* Uh oh, better try to put it back... */
slouken@6188
  1641
            SDL_RecreateWindow(window, windowFlags);
slouken@6188
  1642
            return NULL;
slouken@6188
  1643
        }
slouken@6188
  1644
    }
slouken@5201
  1645
slouken@5201
  1646
    /* Create the renderer struct */
slouken@5201
  1647
    renderer = (SDL_Renderer *)SDL_calloc(1, sizeof(SDL_Renderer));
slouken@5209
  1648
    if (!renderer) {
slouken@5209
  1649
        SDL_OutOfMemory();
slouken@5209
  1650
        return NULL;
slouken@5209
  1651
    }
slouken@5209
  1652
slouken@5201
  1653
    rdata = (GLES2_DriverContext *)SDL_calloc(1, sizeof(GLES2_DriverContext));
slouken@5209
  1654
    if (!rdata) {
slouken@5209
  1655
        GLES2_DestroyRenderer(renderer);
slouken@5201
  1656
        SDL_OutOfMemory();
slouken@5201
  1657
        return NULL;
slouken@5201
  1658
    }
slouken@5201
  1659
    renderer->info = GLES2_RenderDriver.info;
slouken@6237
  1660
    renderer->info.flags = SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE;
slouken@5201
  1661
    renderer->driverdata = rdata;
slouken@6171
  1662
    renderer->window = window;
slouken@5201
  1663
slouken@5209
  1664
    /* Create an OpenGL ES 2.0 context */
slouken@5201
  1665
    rdata->context = SDL_GL_CreateContext(window);
slouken@5201
  1666
    if (!rdata->context)
slouken@5201
  1667
    {
slouken@5209
  1668
        GLES2_DestroyRenderer(renderer);
slouken@5201
  1669
        return NULL;
slouken@5201
  1670
    }
slouken@5202
  1671
    if (SDL_GL_MakeCurrent(window, rdata->context) < 0) {
slouken@5209
  1672
        GLES2_DestroyRenderer(renderer);
slouken@5202
  1673
        return NULL;
slouken@5202
  1674
    }
slouken@5202
  1675
slouken@6188
  1676
    if (GLES2_LoadFunctions(rdata) < 0) {
slouken@6188
  1677
        GLES2_DestroyRenderer(renderer);
slouken@6188
  1678
        return NULL;
slouken@6188
  1679
    }
slouken@6188
  1680
slouken@5202
  1681
    if (flags & SDL_RENDERER_PRESENTVSYNC) {
slouken@5202
  1682
        SDL_GL_SetSwapInterval(1);
slouken@5202
  1683
    } else {
slouken@5202
  1684
        SDL_GL_SetSwapInterval(0);
slouken@5202
  1685
    }
slouken@5202
  1686
    if (SDL_GL_GetSwapInterval() > 0) {
slouken@5202
  1687
        renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
slouken@5202
  1688
    }
slouken@5201
  1689
slouken@5201
  1690
    /* Determine supported shader formats */
slouken@5201
  1691
    /* HACK: glGetInteger is broken on the Zune HD's compositor, so we just hardcode this */
slouken@6188
  1692
    rdata->glGetError();
slouken@5201
  1693
#ifdef ZUNE_HD
slouken@5201
  1694
    nFormats = 1;
slouken@5201
  1695
#else /* !ZUNE_HD */
slouken@6188
  1696
    rdata->glGetIntegerv(GL_NUM_SHADER_BINARY_FORMATS, &nFormats);
slouken@6188
  1697
    rdata->glGetBooleanv(GL_SHADER_COMPILER, &hasCompiler);
slouken@5201
  1698
    if (hasCompiler)
slouken@5201
  1699
        ++nFormats;
slouken@5201
  1700
#endif /* ZUNE_HD */
slouken@5201
  1701
    rdata->shader_formats = (GLenum *)SDL_calloc(nFormats, sizeof(GLenum));
slouken@5201
  1702
    if (!rdata->shader_formats)
slouken@5201
  1703
    {
slouken@5209
  1704
        GLES2_DestroyRenderer(renderer);
slouken@5201
  1705
        SDL_OutOfMemory();
slouken@5201
  1706
        return NULL;
slouken@5201
  1707
    }
slouken@5201
  1708
    rdata->shader_format_count = nFormats;
slouken@5201
  1709
#ifdef ZUNE_HD
slouken@5201
  1710
    rdata->shader_formats[0] = GL_NVIDIA_PLATFORM_BINARY_NV;
slouken@5201
  1711
#else /* !ZUNE_HD */
slouken@6188
  1712
    rdata->glGetIntegerv(GL_SHADER_BINARY_FORMATS, (GLint *)rdata->shader_formats);
slouken@6188
  1713
    if (rdata->glGetError() != GL_NO_ERROR)
slouken@5201
  1714
    {
slouken@5209
  1715
        GLES2_DestroyRenderer(renderer);
slouken@5201
  1716
        SDL_SetError("Failed to query supported shader formats");
slouken@5201
  1717
        return NULL;
slouken@5201
  1718
    }
slouken@5201
  1719
    if (hasCompiler)
slouken@5201
  1720
        rdata->shader_formats[nFormats - 1] = (GLenum)-1;
slouken@5201
  1721
#endif /* ZUNE_HD */
slouken@5201
  1722
slouken@6232
  1723
    rdata->framebuffers = NULL;
slouken@6271
  1724
    rdata->glGetIntegerv(GL_FRAMEBUFFER_BINDING, &window_framebuffer);
slouken@6271
  1725
    rdata->window_framebuffer = (GLuint)window_framebuffer;
slouken@6232
  1726
slouken@5201
  1727
    /* Populate the function pointers for the module */
slouken@5201
  1728
    renderer->WindowEvent         = &GLES2_WindowEvent;
slouken@5201
  1729
    renderer->CreateTexture       = &GLES2_CreateTexture;
slouken@5201
  1730
    renderer->UpdateTexture       = &GLES2_UpdateTexture;
slouken@5201
  1731
    renderer->LockTexture         = &GLES2_LockTexture;
slouken@5201
  1732
    renderer->UnlockTexture       = &GLES2_UnlockTexture;
slouken@6247
  1733
    renderer->SetRenderTarget     = &GLES2_SetRenderTarget;
slouken@5297
  1734
    renderer->UpdateViewport      = &GLES2_UpdateViewport;
slouken@7141
  1735
    renderer->UpdateClipRect      = &GLES2_UpdateClipRect;
slouken@5201
  1736
    renderer->RenderClear         = &GLES2_RenderClear;
slouken@5201
  1737
    renderer->RenderDrawPoints    = &GLES2_RenderDrawPoints;
slouken@5201
  1738
    renderer->RenderDrawLines     = &GLES2_RenderDrawLines;
slouken@5201
  1739
    renderer->RenderFillRects     = &GLES2_RenderFillRects;
slouken@5201
  1740
    renderer->RenderCopy          = &GLES2_RenderCopy;
slouken@7141
  1741
    renderer->RenderCopyEx        = &GLES2_RenderCopyEx;
slouken@6042
  1742
    renderer->RenderReadPixels    = &GLES2_RenderReadPixels;
slouken@5201
  1743
    renderer->RenderPresent       = &GLES2_RenderPresent;
slouken@5201
  1744
    renderer->DestroyTexture      = &GLES2_DestroyTexture;
slouken@5201
  1745
    renderer->DestroyRenderer     = &GLES2_DestroyRenderer;
gabomdq@6414
  1746
    renderer->GL_BindTexture      = &GLES2_BindTexture;
gabomdq@6414
  1747
    renderer->GL_UnbindTexture    = &GLES2_UnbindTexture;
slouken@5355
  1748
slouken@5355
  1749
    GLES2_ResetState(renderer);
slouken@5355
  1750
slouken@5201
  1751
    return renderer;
slouken@5201
  1752
}
slouken@5201
  1753
slouken@5226
  1754
#endif /* SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED */
slouken@5201
  1755
slouken@5201
  1756
/* vi: set ts=4 sw=4 expandtab: */