| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2010 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| #if SDL_VIDEO_RENDER_OGL_ES |
| |
| #include "SDL_video.h" |
| #include "SDL_opengles.h" |
| #include "SDL_sysvideo.h" |
| #include "SDL_pixels_c.h" |
| #include "SDL_rect_c.h" |
| #include "SDL_yuv_sw_c.h" |
| |
| #if defined(__QNXNTO__) |
| /* Include QNX system header to check QNX version later */ |
| #include <sys/neutrino.h> |
| #endif /* __QNXNTO__ */ |
| |
| #if defined(SDL_VIDEO_DRIVER_QNXGF) || \ |
| defined(SDL_VIDEO_DRIVER_PHOTON) || \ |
| defined(SDL_VIDEO_DRIVER_PANDORA) |
| |
| /* Empty function stub to get OpenGL ES 1.x support without */ |
| /* OpenGL ES extension GL_OES_draw_texture supported */ |
| GL_API void GL_APIENTRY |
| glDrawTexiOES(GLint x, GLint y, GLint z, GLint width, GLint height) |
| { |
| return; |
| } |
| |
| #endif /* QNXGF || PHOTON || PANDORA */ |
| |
| /* OpenGL ES 1.1 renderer implementation, based on the OpenGL renderer */ |
| |
| static const float inv255f = 1.0f / 255.0f; |
| |
| static SDL_Renderer *GLES_CreateRenderer(SDL_Window * window, Uint32 flags); |
| static int GLES_ActivateRenderer(SDL_Renderer * renderer); |
| static int GLES_DisplayModeChanged(SDL_Renderer * renderer); |
| static int GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture); |
| static int GLES_QueryTexturePixels(SDL_Renderer * renderer, |
| SDL_Texture * texture, void **pixels, |
| int *pitch); |
| static int GLES_SetTexturePalette(SDL_Renderer * renderer, |
| SDL_Texture * texture, |
| const SDL_Color * colors, int firstcolor, |
| int ncolors); |
| static int GLES_GetTexturePalette(SDL_Renderer * renderer, |
| SDL_Texture * texture, SDL_Color * colors, |
| int firstcolor, int ncolors); |
| static int GLES_SetTextureColorMod(SDL_Renderer * renderer, |
| SDL_Texture * texture); |
| static int GLES_SetTextureAlphaMod(SDL_Renderer * renderer, |
| SDL_Texture * texture); |
| static int GLES_SetTextureBlendMode(SDL_Renderer * renderer, |
| SDL_Texture * texture); |
| static int GLES_SetTextureScaleMode(SDL_Renderer * renderer, |
| SDL_Texture * texture); |
| static int GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture, |
| const SDL_Rect * rect, const void *pixels, |
| int pitch); |
| static int GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture, |
| const SDL_Rect * rect, int markDirty, |
| void **pixels, int *pitch); |
| static void GLES_UnlockTexture(SDL_Renderer * renderer, |
| SDL_Texture * texture); |
| static void GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture, |
| int numrects, const SDL_Rect * rects); |
| static int GLES_RenderDrawPoints(SDL_Renderer * renderer, |
| const SDL_Point * points, int count); |
| static int GLES_RenderDrawLines(SDL_Renderer * renderer, |
| const SDL_Point * points, int count); |
| static int GLES_RenderDrawRects(SDL_Renderer * renderer, |
| const SDL_Rect ** rects, int count); |
| static int GLES_RenderFillRects(SDL_Renderer * renderer, |
| const SDL_Rect ** rects, int count); |
| static int GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, |
| const SDL_Rect * srcrect, |
| const SDL_Rect * dstrect); |
| static void GLES_RenderPresent(SDL_Renderer * renderer); |
| static void GLES_DestroyTexture(SDL_Renderer * renderer, |
| SDL_Texture * texture); |
| static void GLES_DestroyRenderer(SDL_Renderer * renderer); |
| |
| |
| SDL_RenderDriver GL_ES_RenderDriver = { |
| GLES_CreateRenderer, |
| { |
| "opengl_es", |
| (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD | |
| SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED), |
| (SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR | |
| SDL_TEXTUREMODULATE_ALPHA), |
| (SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK | |
| SDL_BLENDMODE_BLEND | SDL_BLENDMODE_ADD | SDL_BLENDMODE_MOD), |
| (SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST | |
| SDL_TEXTURESCALEMODE_SLOW), 5, |
| { |
| /* OpenGL ES 1.x supported formats list */ |
| SDL_PIXELFORMAT_ABGR4444, |
| SDL_PIXELFORMAT_ABGR1555, |
| SDL_PIXELFORMAT_BGR565, |
| SDL_PIXELFORMAT_BGR24, |
| SDL_PIXELFORMAT_ABGR8888}, |
| 0, |
| 0} |
| }; |
| |
| typedef struct |
| { |
| SDL_GLContext context; |
| SDL_bool updateSize; |
| int blendMode; |
| |
| #ifndef APIENTRY |
| #define APIENTRY |
| #endif |
| |
| SDL_bool useDrawTexture; |
| SDL_bool GL_OES_draw_texture_supported; |
| |
| /* OpenGL ES functions */ |
| #define SDL_PROC(ret,func,params) ret (APIENTRY *func) params; |
| #include "SDL_glesfuncs.h" |
| #undef SDL_PROC |
| |
| } GLES_RenderData; |
| |
| typedef struct |
| { |
| GLuint texture; |
| GLenum type; |
| GLfloat texw; |
| GLfloat texh; |
| GLenum format; |
| GLenum formattype; |
| void *pixels; |
| int pitch; |
| SDL_DirtyRectList dirty; |
| } GLES_TextureData; |
| |
| static void |
| GLES_SetError(const char *prefix, GLenum result) |
| { |
| const char *error; |
| |
| switch (result) { |
| case GL_NO_ERROR: |
| error = "GL_NO_ERROR"; |
| break; |
| case GL_INVALID_ENUM: |
| error = "GL_INVALID_ENUM"; |
| break; |
| case GL_INVALID_VALUE: |
| error = "GL_INVALID_VALUE"; |
| break; |
| case GL_INVALID_OPERATION: |
| error = "GL_INVALID_OPERATION"; |
| break; |
| case GL_STACK_OVERFLOW: |
| error = "GL_STACK_OVERFLOW"; |
| break; |
| case GL_STACK_UNDERFLOW: |
| error = "GL_STACK_UNDERFLOW"; |
| break; |
| case GL_OUT_OF_MEMORY: |
| error = "GL_OUT_OF_MEMORY"; |
| break; |
| default: |
| error = "UNKNOWN"; |
| break; |
| } |
| SDL_SetError("%s: %s", prefix, error); |
| } |
| |
| static int |
| GLES_LoadFunctions(GLES_RenderData * data) |
| { |
| |
| #define SDL_PROC(ret,func,params) \ |
| data->func = func; |
| #include "SDL_glesfuncs.h" |
| #undef SDL_PROC |
| |
| return 0; |
| } |
| |
| SDL_Renderer * |
| GLES_CreateRenderer(SDL_Window * window, Uint32 flags) |
| { |
| |
| SDL_Renderer *renderer; |
| GLES_RenderData *data; |
| GLint value; |
| int doublebuffer; |
| |
| if (!(window->flags & SDL_WINDOW_OPENGL)) { |
| if (SDL_RecreateWindow(window, window->flags | SDL_WINDOW_OPENGL) < 0) { |
| return NULL; |
| } |
| } |
| |
| renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer)); |
| if (!renderer) { |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| |
| data = (GLES_RenderData *) SDL_calloc(1, sizeof(*data)); |
| if (!data) { |
| GLES_DestroyRenderer(renderer); |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| |
| renderer->ActivateRenderer = GLES_ActivateRenderer; |
| renderer->DisplayModeChanged = GLES_DisplayModeChanged; |
| renderer->CreateTexture = GLES_CreateTexture; |
| renderer->QueryTexturePixels = GLES_QueryTexturePixels; |
| renderer->SetTexturePalette = GLES_SetTexturePalette; |
| renderer->GetTexturePalette = GLES_GetTexturePalette; |
| renderer->SetTextureColorMod = GLES_SetTextureColorMod; |
| renderer->SetTextureAlphaMod = GLES_SetTextureAlphaMod; |
| renderer->SetTextureBlendMode = GLES_SetTextureBlendMode; |
| renderer->SetTextureScaleMode = GLES_SetTextureScaleMode; |
| renderer->UpdateTexture = GLES_UpdateTexture; |
| renderer->LockTexture = GLES_LockTexture; |
| renderer->UnlockTexture = GLES_UnlockTexture; |
| renderer->DirtyTexture = GLES_DirtyTexture; |
| renderer->RenderDrawPoints = GLES_RenderDrawPoints; |
| renderer->RenderDrawLines = GLES_RenderDrawLines; |
| renderer->RenderDrawRects = GLES_RenderDrawRects; |
| renderer->RenderFillRects = GLES_RenderFillRects; |
| renderer->RenderCopy = GLES_RenderCopy; |
| renderer->RenderPresent = GLES_RenderPresent; |
| renderer->DestroyTexture = GLES_DestroyTexture; |
| renderer->DestroyRenderer = GLES_DestroyRenderer; |
| renderer->info = GL_ES_RenderDriver.info; |
| renderer->window = window; |
| renderer->driverdata = data; |
| |
| renderer->info.flags = |
| (SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED); |
| |
| #if defined(__QNXNTO__) |
| #if _NTO_VERSION<=641 |
| /* QNX's OpenGL ES implementation is broken regarding */ |
| /* packed textures support, affected versions 6.3.2, 6.4.0, 6.4.1 */ |
| renderer->info.num_texture_formats = 2; |
| renderer->info.texture_formats[0] = SDL_PIXELFORMAT_ABGR8888; |
| renderer->info.texture_formats[1] = SDL_PIXELFORMAT_BGR24; |
| #endif /* _NTO_VERSION */ |
| #endif /* __QNXNTO__ */ |
| |
| if (GLES_LoadFunctions(data) < 0) { |
| GLES_DestroyRenderer(renderer); |
| return NULL; |
| } |
| |
| data->context = SDL_GL_CreateContext(window); |
| if (!data->context) { |
| GLES_DestroyRenderer(renderer); |
| return NULL; |
| } |
| if (SDL_GL_MakeCurrent(window, data->context) < 0) { |
| GLES_DestroyRenderer(renderer); |
| return NULL; |
| } |
| |
| if (flags & SDL_RENDERER_PRESENTVSYNC) { |
| SDL_GL_SetSwapInterval(1); |
| } else { |
| SDL_GL_SetSwapInterval(0); |
| } |
| if (SDL_GL_GetSwapInterval() > 0) { |
| renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC; |
| } |
| |
| if (SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &doublebuffer) == 0) { |
| if (!doublebuffer) { |
| renderer->info.flags |= SDL_RENDERER_SINGLEBUFFER; |
| } |
| } |
| #if SDL_VIDEO_DRIVER_PANDORA |
| data->GL_OES_draw_texture_supported = SDL_FALSE; |
| data->useDrawTexture = SDL_FALSE; |
| #else |
| if (SDL_GL_ExtensionSupported("GL_OES_draw_texture")) { |
| data->GL_OES_draw_texture_supported = SDL_TRUE; |
| data->useDrawTexture = SDL_TRUE; |
| } else { |
| data->GL_OES_draw_texture_supported = SDL_FALSE; |
| data->useDrawTexture = SDL_FALSE; |
| } |
| #endif |
| |
| data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value); |
| renderer->info.max_texture_width = value; |
| data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value); |
| renderer->info.max_texture_height = value; |
| |
| /* Set up parameters for rendering */ |
| data->blendMode = -1; |
| data->glDisable(GL_DEPTH_TEST); |
| data->glDisable(GL_CULL_FACE); |
| data->updateSize = SDL_TRUE; |
| |
| return renderer; |
| } |
| |
| static int |
| GLES_ActivateRenderer(SDL_Renderer * renderer) |
| { |
| |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| SDL_Window *window = renderer->window; |
| |
| if (SDL_GL_MakeCurrent(window, data->context) < 0) { |
| return -1; |
| } |
| if (data->updateSize) { |
| data->glMatrixMode(GL_PROJECTION); |
| data->glLoadIdentity(); |
| data->glMatrixMode(GL_MODELVIEW); |
| data->glLoadIdentity(); |
| data->glViewport(0, 0, window->w, window->h); |
| data->glOrthof(0.0, (GLfloat) window->w, (GLfloat) window->h, 0.0, |
| 0.0, 1.0); |
| data->updateSize = SDL_FALSE; |
| } |
| return 0; |
| } |
| |
| static int |
| GLES_DisplayModeChanged(SDL_Renderer * renderer) |
| { |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| |
| data->updateSize = SDL_TRUE; |
| return 0; |
| } |
| |
| static __inline__ int |
| power_of_2(int input) |
| { |
| int value = 1; |
| |
| while (value < input) { |
| value <<= 1; |
| } |
| return value; |
| } |
| |
| static int |
| GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture) |
| { |
| GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata; |
| GLES_TextureData *data; |
| GLint internalFormat; |
| GLenum format, type; |
| int texture_w, texture_h; |
| GLenum result; |
| |
| switch (texture->format) { |
| case SDL_PIXELFORMAT_BGR24: |
| internalFormat = GL_RGB; |
| format = GL_RGB; |
| type = GL_UNSIGNED_BYTE; |
| break; |
| case SDL_PIXELFORMAT_ABGR8888: |
| internalFormat = GL_RGBA; |
| format = GL_RGBA; |
| type = GL_UNSIGNED_BYTE; |
| break; |
| case SDL_PIXELFORMAT_BGR565: |
| internalFormat = GL_RGB; |
| format = GL_RGB; |
| type = GL_UNSIGNED_SHORT_5_6_5; |
| break; |
| case SDL_PIXELFORMAT_ABGR1555: |
| internalFormat = GL_RGBA; |
| format = GL_RGBA; |
| type = GL_UNSIGNED_SHORT_5_5_5_1; |
| break; |
| case SDL_PIXELFORMAT_ABGR4444: |
| internalFormat = GL_RGBA; |
| format = GL_RGBA; |
| type = GL_UNSIGNED_SHORT_4_4_4_4; |
| break; |
| default: |
| SDL_SetError("Unsupported by OpenGL ES texture format"); |
| return -1; |
| } |
| |
| data = (GLES_TextureData *) SDL_calloc(1, sizeof(*data)); |
| if (!data) { |
| SDL_OutOfMemory(); |
| return -1; |
| } |
| |
| if (texture->access == SDL_TEXTUREACCESS_STREAMING) { |
| data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format); |
| data->pixels = SDL_malloc(texture->h * data->pitch); |
| if (!data->pixels) { |
| SDL_OutOfMemory(); |
| SDL_free(data); |
| return -1; |
| } |
| } |
| |
| texture->driverdata = data; |
| |
| renderdata->glGetError(); |
| renderdata->glEnable(GL_TEXTURE_2D); |
| renderdata->glGenTextures(1, &data->texture); |
| |
| data->type = GL_TEXTURE_2D; |
| /* no NPOV textures allowed in OpenGL ES (yet) */ |
| texture_w = power_of_2(texture->w); |
| texture_h = power_of_2(texture->h); |
| data->texw = (GLfloat) texture->w / texture_w; |
| data->texh = (GLfloat) texture->h / texture_h; |
| |
| data->format = format; |
| data->formattype = type; |
| renderdata->glBindTexture(data->type, data->texture); |
| renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER, |
| GL_NEAREST); |
| renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER, |
| GL_NEAREST); |
| renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S, |
| GL_CLAMP_TO_EDGE); |
| renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T, |
| GL_CLAMP_TO_EDGE); |
| |
| renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w, |
| texture_h, 0, format, type, NULL); |
| renderdata->glDisable(GL_TEXTURE_2D); |
| |
| result = renderdata->glGetError(); |
| if (result != GL_NO_ERROR) { |
| GLES_SetError("glTexImage2D()", result); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int |
| GLES_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture, |
| void **pixels, int *pitch) |
| { |
| GLES_TextureData *data = (GLES_TextureData *) texture->driverdata; |
| |
| *pixels = data->pixels; |
| *pitch = data->pitch; |
| return 0; |
| } |
| |
| static int |
| GLES_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture, |
| const SDL_Color * colors, int firstcolor, int ncolors) |
| { |
| SDL_SetError("OpenGL ES does not support paletted textures"); |
| return -1; |
| } |
| |
| static int |
| GLES_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture, |
| SDL_Color * colors, int firstcolor, int ncolors) |
| { |
| SDL_SetError("OpenGL ES does not support paletted textures"); |
| return -1; |
| } |
| |
| static void |
| SetupTextureUpdate(GLES_RenderData * renderdata, SDL_Texture * texture, |
| int pitch) |
| { |
| GLES_TextureData *data = (GLES_TextureData *) texture->driverdata; |
| renderdata->glBindTexture(data->type, data->texture); |
| renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| } |
| |
| static int |
| GLES_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture) |
| { |
| return 0; |
| } |
| |
| static int |
| GLES_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture) |
| { |
| return 0; |
| } |
| |
| static int |
| GLES_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture) |
| { |
| switch (texture->blendMode) { |
| case SDL_BLENDMODE_NONE: |
| case SDL_BLENDMODE_MASK: |
| case SDL_BLENDMODE_BLEND: |
| case SDL_BLENDMODE_ADD: |
| case SDL_BLENDMODE_MOD: |
| return 0; |
| default: |
| SDL_Unsupported(); |
| texture->blendMode = SDL_BLENDMODE_NONE; |
| return -1; |
| } |
| } |
| |
| static int |
| GLES_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture) |
| { |
| switch (texture->scaleMode) { |
| case SDL_TEXTURESCALEMODE_NONE: |
| case SDL_TEXTURESCALEMODE_FAST: |
| case SDL_TEXTURESCALEMODE_SLOW: |
| return 0; |
| case SDL_TEXTURESCALEMODE_BEST: |
| SDL_Unsupported(); |
| texture->scaleMode = SDL_TEXTURESCALEMODE_SLOW; |
| return -1; |
| default: |
| SDL_Unsupported(); |
| texture->scaleMode = SDL_TEXTURESCALEMODE_NONE; |
| return -1; |
| } |
| } |
| |
| static int |
| GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture, |
| const SDL_Rect * rect, const void *pixels, int pitch) |
| { |
| GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata; |
| GLES_TextureData *data = (GLES_TextureData *) texture->driverdata; |
| GLenum result; |
| |
| renderdata->glGetError(); |
| renderdata->glEnable(data->type); |
| SetupTextureUpdate(renderdata, texture, pitch); |
| renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w, |
| rect->h, data->format, data->formattype, |
| pixels); |
| renderdata->glDisable(data->type); |
| result = renderdata->glGetError(); |
| if (result != GL_NO_ERROR) { |
| GLES_SetError("glTexSubImage2D()", result); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int |
| GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture, |
| const SDL_Rect * rect, int markDirty, void **pixels, |
| int *pitch) |
| { |
| GLES_TextureData *data = (GLES_TextureData *) texture->driverdata; |
| |
| if (markDirty) { |
| SDL_AddDirtyRect(&data->dirty, rect); |
| } |
| |
| *pixels = |
| (void *) ((Uint8 *) data->pixels + rect->y * data->pitch + |
| rect->x * SDL_BYTESPERPIXEL(texture->format)); |
| *pitch = data->pitch; |
| return 0; |
| } |
| |
| static void |
| GLES_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture) |
| { |
| } |
| |
| static void |
| GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture, |
| int numrects, const SDL_Rect * rects) |
| { |
| GLES_TextureData *data = (GLES_TextureData *) texture->driverdata; |
| int i; |
| |
| for (i = 0; i < numrects; ++i) { |
| SDL_AddDirtyRect(&data->dirty, &rects[i]); |
| } |
| } |
| |
| static void |
| GLES_SetBlendMode(GLES_RenderData * data, int blendMode, int isprimitive) |
| { |
| if (blendMode != data->blendMode) { |
| switch (blendMode) { |
| case SDL_BLENDMODE_NONE: |
| data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
| data->glDisable(GL_BLEND); |
| break; |
| case SDL_BLENDMODE_MASK: |
| if (isprimitive) { |
| data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
| data->glDisable(GL_BLEND); |
| /* The same as SDL_BLENDMODE_NONE */ |
| blendMode = SDL_BLENDMODE_NONE; |
| break; |
| } |
| /* fall through */ |
| case SDL_BLENDMODE_BLEND: |
| data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| data->glEnable(GL_BLEND); |
| data->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
| break; |
| case SDL_BLENDMODE_ADD: |
| data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| data->glEnable(GL_BLEND); |
| data->glBlendFunc(GL_SRC_ALPHA, GL_ONE); |
| break; |
| case SDL_BLENDMODE_MOD: |
| data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| data->glEnable(GL_BLEND); |
| data->glBlendFunc(GL_ZERO, GL_SRC_COLOR); |
| break; |
| } |
| data->blendMode = blendMode; |
| } |
| } |
| |
| static int |
| GLES_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points, |
| int count) |
| { |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| int i; |
| GLshort *vertices; |
| |
| GLES_SetBlendMode(data, renderer->blendMode, 1); |
| |
| data->glColor4f((GLfloat) renderer->r * inv255f, |
| (GLfloat) renderer->g * inv255f, |
| (GLfloat) renderer->b * inv255f, |
| (GLfloat) renderer->a * inv255f); |
| |
| vertices = SDL_stack_alloc(GLshort, count*2); |
| for (i = 0; i < count; ++i) { |
| vertices[2*i+0] = (GLshort)points[i].x; |
| vertices[2*i+1] = (GLshort)points[i].y; |
| } |
| data->glVertexPointer(2, GL_SHORT, 0, vertices); |
| data->glEnableClientState(GL_VERTEX_ARRAY); |
| data->glDrawArrays(GL_POINTS, 0, count); |
| data->glDisableClientState(GL_VERTEX_ARRAY); |
| SDL_stack_free(vertices); |
| |
| return 0; |
| } |
| |
| static int |
| GLES_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points, |
| int count) |
| { |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| int i; |
| GLshort *vertices; |
| |
| GLES_SetBlendMode(data, renderer->blendMode, 1); |
| |
| data->glColor4f((GLfloat) renderer->r * inv255f, |
| (GLfloat) renderer->g * inv255f, |
| (GLfloat) renderer->b * inv255f, |
| (GLfloat) renderer->a * inv255f); |
| |
| vertices = SDL_stack_alloc(GLshort, count*2); |
| for (i = 0; i < count; ++i) { |
| vertices[2*i+0] = (GLshort)points[i].x; |
| vertices[2*i+1] = (GLshort)points[i].y; |
| } |
| data->glVertexPointer(2, GL_SHORT, 0, vertices); |
| data->glEnableClientState(GL_VERTEX_ARRAY); |
| if (count > 2 && |
| points[0].x == points[count-1].x && points[0].y == points[count-1].y) { |
| /* GL_LINE_LOOP takes care of the final segment */ |
| --count; |
| data->glDrawArrays(GL_LINE_LOOP, 0, count); |
| } else { |
| data->glDrawArrays(GL_LINE_STRIP, 0, count); |
| } |
| data->glDisableClientState(GL_VERTEX_ARRAY); |
| SDL_stack_free(vertices); |
| |
| return 0; |
| } |
| |
| static int |
| GLES_RenderDrawRects(SDL_Renderer * renderer, const SDL_Rect ** rects, |
| int count) |
| { |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| int i; |
| |
| GLES_SetBlendMode(data, renderer->blendMode, 1); |
| |
| data->glColor4f((GLfloat) renderer->r * inv255f, |
| (GLfloat) renderer->g * inv255f, |
| (GLfloat) renderer->b * inv255f, |
| (GLfloat) renderer->a * inv255f); |
| |
| data->glEnableClientState(GL_VERTEX_ARRAY); |
| for (i = 0; i < count; ++i) { |
| const SDL_Rect *rect = rects[i]; |
| GLshort minx = rect->x; |
| GLshort maxx = rect->x + rect->w; |
| GLshort miny = rect->y; |
| GLshort maxy = rect->y + rect->h; |
| GLshort vertices[8]; |
| vertices[0] = minx; |
| vertices[1] = miny; |
| vertices[2] = maxx; |
| vertices[3] = miny; |
| vertices[4] = minx; |
| vertices[5] = maxy; |
| vertices[6] = maxx; |
| vertices[7] = maxy; |
| |
| data->glVertexPointer(2, GL_SHORT, 0, vertices); |
| data->glDrawArrays(GL_LINE_LOOP, 0, 4); |
| } |
| data->glDisableClientState(GL_VERTEX_ARRAY); |
| |
| return 0; |
| } |
| |
| static int |
| GLES_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects, |
| int count) |
| { |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| int i; |
| |
| GLES_SetBlendMode(data, renderer->blendMode, 1); |
| |
| data->glColor4f((GLfloat) renderer->r * inv255f, |
| (GLfloat) renderer->g * inv255f, |
| (GLfloat) renderer->b * inv255f, |
| (GLfloat) renderer->a * inv255f); |
| |
| data->glEnableClientState(GL_VERTEX_ARRAY); |
| for (i = 0; i < count; ++i) { |
| const SDL_Rect *rect = rects[i]; |
| GLshort minx = rect->x; |
| GLshort maxx = rect->x + rect->w; |
| GLshort miny = rect->y; |
| GLshort maxy = rect->y + rect->h; |
| GLshort vertices[8]; |
| vertices[0] = minx; |
| vertices[1] = miny; |
| vertices[2] = maxx; |
| vertices[3] = miny; |
| vertices[4] = minx; |
| vertices[5] = maxy; |
| vertices[6] = maxx; |
| vertices[7] = maxy; |
| |
| data->glVertexPointer(2, GL_SHORT, 0, vertices); |
| data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
| } |
| data->glDisableClientState(GL_VERTEX_ARRAY); |
| |
| return 0; |
| } |
| |
| static int |
| GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, |
| const SDL_Rect * srcrect, const SDL_Rect * dstrect) |
| { |
| |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| GLES_TextureData *texturedata = (GLES_TextureData *) texture->driverdata; |
| int minx, miny, maxx, maxy; |
| GLfloat minu, maxu, minv, maxv; |
| int i; |
| void *temp_buffer; /* used for reformatting dirty rect pixels */ |
| void *temp_ptr; |
| |
| data->glEnable(GL_TEXTURE_2D); |
| |
| if (texturedata->dirty.list) { |
| SDL_DirtyRect *dirty; |
| void *pixels; |
| int bpp = SDL_BYTESPERPIXEL(texture->format); |
| int pitch = texturedata->pitch; |
| |
| SetupTextureUpdate(data, texture, pitch); |
| |
| data->glBindTexture(texturedata->type, texturedata->texture); |
| for (dirty = texturedata->dirty.list; dirty; dirty = dirty->next) { |
| SDL_Rect *rect = &dirty->rect; |
| pixels = |
| (void *) ((Uint8 *) texturedata->pixels + rect->y * pitch + |
| rect->x * bpp); |
| /* There is no GL_UNPACK_ROW_LENGTH in OpenGLES |
| we must do this reformatting ourselves(!) |
| |
| maybe it'd be a good idea to keep a temp buffer around |
| for this purpose rather than allocating it each time |
| */ |
| temp_buffer = SDL_malloc(rect->w * rect->h * bpp); |
| temp_ptr = temp_buffer; |
| for (i = 0; i < rect->h; i++) { |
| SDL_memcpy(temp_ptr, pixels, rect->w * bpp); |
| temp_ptr += rect->w * bpp; |
| pixels += pitch; |
| } |
| |
| data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y, |
| rect->w, rect->h, texturedata->format, |
| texturedata->formattype, temp_buffer); |
| |
| SDL_free(temp_buffer); |
| |
| } |
| SDL_ClearDirtyRects(&texturedata->dirty); |
| } |
| |
| data->glBindTexture(texturedata->type, texturedata->texture); |
| |
| if (texture->modMode) { |
| data->glColor4f((GLfloat) texture->r * inv255f, |
| (GLfloat) texture->g * inv255f, |
| (GLfloat) texture->b * inv255f, |
| (GLfloat) texture->a * inv255f); |
| } else { |
| data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f); |
| } |
| |
| GLES_SetBlendMode(data, texture->blendMode, 0); |
| |
| switch (texture->scaleMode) { |
| case SDL_TEXTURESCALEMODE_NONE: |
| case SDL_TEXTURESCALEMODE_FAST: |
| data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER, |
| GL_NEAREST); |
| data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER, |
| GL_NEAREST); |
| break; |
| case SDL_TEXTURESCALEMODE_SLOW: |
| case SDL_TEXTURESCALEMODE_BEST: |
| data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER, |
| GL_LINEAR); |
| data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER, |
| GL_LINEAR); |
| break; |
| } |
| |
| if (data->GL_OES_draw_texture_supported && data->useDrawTexture) { |
| /* this code is a little funny because the viewport is upside down vs SDL's coordinate system */ |
| SDL_Window *window = renderer->window; |
| GLint cropRect[4]; |
| cropRect[0] = srcrect->x; |
| cropRect[1] = srcrect->y + srcrect->h; |
| cropRect[2] = srcrect->w; |
| cropRect[3] = -srcrect->h; |
| data->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, |
| cropRect); |
| data->glDrawTexiOES(dstrect->x, window->h - dstrect->y - dstrect->h, |
| 0, dstrect->w, dstrect->h); |
| } else { |
| |
| minx = dstrect->x; |
| miny = dstrect->y; |
| maxx = dstrect->x + dstrect->w; |
| maxy = dstrect->y + dstrect->h; |
| |
| minu = (GLfloat) srcrect->x / texture->w; |
| minu *= texturedata->texw; |
| maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w; |
| maxu *= texturedata->texw; |
| minv = (GLfloat) srcrect->y / texture->h; |
| minv *= texturedata->texh; |
| maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h; |
| maxv *= texturedata->texh; |
| |
| GLshort vertices[8]; |
| GLfloat texCoords[8]; |
| |
| vertices[0] = minx; |
| vertices[1] = miny; |
| vertices[2] = maxx; |
| vertices[3] = miny; |
| vertices[4] = minx; |
| vertices[5] = maxy; |
| vertices[6] = maxx; |
| vertices[7] = maxy; |
| |
| texCoords[0] = minu; |
| texCoords[1] = minv; |
| texCoords[2] = maxu; |
| texCoords[3] = minv; |
| texCoords[4] = minu; |
| texCoords[5] = maxv; |
| texCoords[6] = maxu; |
| texCoords[7] = maxv; |
| |
| data->glVertexPointer(2, GL_SHORT, 0, vertices); |
| data->glEnableClientState(GL_VERTEX_ARRAY); |
| data->glTexCoordPointer(2, GL_FLOAT, 0, texCoords); |
| data->glEnableClientState(GL_TEXTURE_COORD_ARRAY); |
| data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
| data->glDisableClientState(GL_TEXTURE_COORD_ARRAY); |
| data->glDisableClientState(GL_VERTEX_ARRAY); |
| } |
| |
| data->glDisable(GL_TEXTURE_2D); |
| |
| return 0; |
| } |
| |
| static void |
| GLES_RenderPresent(SDL_Renderer * renderer) |
| { |
| SDL_GL_SwapWindow(renderer->window); |
| } |
| |
| static void |
| GLES_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture) |
| { |
| GLES_TextureData *data = (GLES_TextureData *) texture->driverdata; |
| |
| if (!data) { |
| return; |
| } |
| if (data->texture) { |
| glDeleteTextures(1, &data->texture); |
| } |
| if (data->pixels) { |
| SDL_free(data->pixels); |
| } |
| SDL_FreeDirtyRects(&data->dirty); |
| SDL_free(data); |
| texture->driverdata = NULL; |
| } |
| |
| static void |
| GLES_DestroyRenderer(SDL_Renderer * renderer) |
| { |
| GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata; |
| |
| if (data) { |
| if (data->context) { |
| SDL_GL_DeleteContext(data->context); |
| } |
| SDL_free(data); |
| } |
| SDL_free(renderer); |
| } |
| |
| #endif /* SDL_VIDEO_RENDER_OGL_ES */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |