Mercurial > sdl-ios-xcode

comparison src/video/SDL_renderer_gl.c @ 2222:926294b2bb4e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Emphasized the separation between SDL_Surface and SDL_Texture - SDL_Surface is a system memory representation of pixel data - SDL_Texture is a video memory representation of pixel data The concept of SDL_Surface with SDL_HWSURFACE is no longer used. Separated SDL_Texture types by usage rather than memory type - SDL_TEXTUREACCESS_STATIC is for rarely changed pixel data, can be placed in video memory. - SDL_TEXTUREACCESS_STREAMING is for frequently changing pixel data, usually placed in system memory or AGP memory. Optimized the SDL_compat usage of the OpenGL renderer by only using one copy of the framebuffer instead of two.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 11 Aug 2007 20:54:31 +0000
parents f4c65e3bfaed
children 9b7d29d2432b
comparison
equal deleted inserted replaced
2221:1d75c38e1e5c 2222:926294b2bb4e
36 36
37 static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags); 37 static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags);
38 static int GL_ActivateRenderer(SDL_Renderer * renderer); 38 static int GL_ActivateRenderer(SDL_Renderer * renderer);
39 static int GL_DisplayModeChanged(SDL_Renderer * renderer); 39 static int GL_DisplayModeChanged(SDL_Renderer * renderer);
40 static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture); 40 static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
41 static int GL_QueryTexturePixels(SDL_Renderer * renderer,
42 SDL_Texture * texture, void **pixels,
43 int *pitch);
41 static int GL_SetTexturePalette(SDL_Renderer * renderer, 44 static int GL_SetTexturePalette(SDL_Renderer * renderer,
42 SDL_Texture * texture, 45 SDL_Texture * texture,
43 const SDL_Color * colors, int firstcolor, 46 const SDL_Color * colors, int firstcolor,
44 int ncolors); 47 int ncolors);
45 static int GL_GetTexturePalette(SDL_Renderer * renderer, 48 static int GL_GetTexturePalette(SDL_Renderer * renderer,
243 } 246 }
244 247
245 renderer->ActivateRenderer = GL_ActivateRenderer; 248 renderer->ActivateRenderer = GL_ActivateRenderer;
246 renderer->DisplayModeChanged = GL_DisplayModeChanged; 249 renderer->DisplayModeChanged = GL_DisplayModeChanged;
247 renderer->CreateTexture = GL_CreateTexture; 250 renderer->CreateTexture = GL_CreateTexture;
251 renderer->QueryTexturePixels = GL_QueryTexturePixels;
248 renderer->SetTexturePalette = GL_SetTexturePalette; 252 renderer->SetTexturePalette = GL_SetTexturePalette;
249 renderer->GetTexturePalette = GL_GetTexturePalette; 253 renderer->GetTexturePalette = GL_GetTexturePalette;
250 renderer->SetTextureColorMod = GL_SetTextureColorMod; 254 renderer->SetTextureColorMod = GL_SetTextureColorMod;
251 renderer->SetTextureAlphaMod = GL_SetTextureAlphaMod; 255 renderer->SetTextureAlphaMod = GL_SetTextureAlphaMod;
252 renderer->SetTextureBlendMode = GL_SetTextureBlendMode; 256 renderer->SetTextureBlendMode = GL_SetTextureBlendMode;
490 return -1; 494 return -1;
491 } 495 }
492 SDL_memset(data->palette, 0xFF, 3 * 256 * sizeof(Uint8)); 496 SDL_memset(data->palette, 0xFF, 3 * 256 * sizeof(Uint8));
493 } 497 }
494 498
499 if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
500 data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
501 data->pixels = SDL_malloc(texture->h * data->pitch);
502 if (!data->pixels) {
503 SDL_OutOfMemory();
504 SDL_free(data);
505 return -1;
506 }
507 }
508
495 texture->driverdata = data; 509 texture->driverdata = data;
496 510
497 renderdata->glGetError(); 511 renderdata->glGetError();
498 renderdata->glGenTextures(1, &data->texture); 512 renderdata->glGenTextures(1, &data->texture);
499 if (renderdata->GL_ARB_texture_rectangle_supported) { 513 if (renderdata->GL_ARB_texture_rectangle_supported) {
521 } 535 }
522 return 0; 536 return 0;
523 } 537 }
524 538
525 static int 539 static int
540 GL_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
541 void **pixels, int *pitch)
542 {
543 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
544
545 *pixels = data->pixels;
546 *pitch = data->pitch;
547 return 0;
548 }
549
550 static int
526 GL_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture, 551 GL_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
527 const SDL_Color * colors, int firstcolor, int ncolors) 552 const SDL_Color * colors, int firstcolor, int ncolors)
528 { 553 {
529 GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata; 554 GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
530 GL_TextureData *data = (GL_TextureData *) texture->driverdata; 555 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
658 GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture, 683 GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
659 const SDL_Rect * rect, int markDirty, void **pixels, 684 const SDL_Rect * rect, int markDirty, void **pixels,
660 int *pitch) 685 int *pitch)
661 { 686 {
662 GL_TextureData *data = (GL_TextureData *) texture->driverdata; 687 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
663
664 if (!data->pixels) {
665 data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
666 data->pixels = SDL_malloc(texture->h * data->pitch);
667 if (!data->pixels) {
668 SDL_OutOfMemory();
669 return -1;
670 }
671 }
672 688
673 if (markDirty) { 689 if (markDirty) {
674 SDL_AddDirtyRect(&data->dirty, rect); 690 SDL_AddDirtyRect(&data->dirty, rect);
675 } 691 }
676 692