Mercurial > sdl-ios-xcode
comparison src/video/SDL_video.c @ 3427:36cf454ba065
Work in progress on implementation of SDL_RenderReadPixels() and SDL_RenderWritePixels(), code untested.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 09 Nov 2009 05:20:11 +0000 |
| parents | 25ccea045c9f |
| children | 9f62f47d989b |
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| 3426:ee0178f1c507 | 3427:36cf454ba065 |
|---|---|
| 2484 | 2484 |
| 2485 return renderer->RenderCopy(renderer, texture, &real_srcrect, | 2485 return renderer->RenderCopy(renderer, texture, &real_srcrect, |
| 2486 &real_dstrect); | 2486 &real_dstrect); |
| 2487 } | 2487 } |
| 2488 | 2488 |
| 2489 int | |
| 2490 SDL_RenderReadPixels(const SDL_Rect * rect, void * pixels, int pitch) | |
| 2491 { | |
| 2492 SDL_Renderer *renderer; | |
| 2493 SDL_Window *window; | |
| 2494 SDL_Rect real_rect; | |
| 2495 | |
| 2496 renderer = SDL_GetCurrentRenderer(); | |
| 2497 if (!renderer) { | |
| 2498 return -1; | |
| 2499 } | |
| 2500 if (!renderer->RenderReadPixels) { | |
| 2501 SDL_Unsupported(); | |
| 2502 return -1; | |
| 2503 } | |
| 2504 window = SDL_GetWindowFromID(renderer->window); | |
| 2505 | |
| 2506 real_rect.x = 0; | |
| 2507 real_rect.y = 0; | |
| 2508 real_rect.w = window->w; | |
| 2509 real_rect.h = window->h; | |
| 2510 if (rect) { | |
| 2511 if (!SDL_IntersectRect(rect, &real_rect, &real_rect)) { | |
| 2512 return 0; | |
| 2513 } | |
| 2514 if (real_rect.y > rect->y) { | |
| 2515 pixels = (Uint8 *)pixels + pitch * (real_rect.y - rect->y); | |
| 2516 } | |
| 2517 if (real_rect.x > rect->x) { | |
| 2518 Uint32 format = SDL_CurrentDisplay.current_mode.format; | |
| 2519 int bpp = SDL_BYTESPERPIXEL(format); | |
| 2520 pixels = (Uint8 *)pixels + bpp * (real_rect.x - rect->x); | |
| 2521 } | |
| 2522 } | |
| 2523 | |
| 2524 return renderer->RenderReadPixels(renderer, &real_rect, pixels, pitch); | |
| 2525 } | |
| 2526 | |
| 2527 int | |
| 2528 SDL_RenderWritePixels(const SDL_Rect * rect, const void * pixels, int pitch) | |
| 2529 { | |
| 2530 SDL_Renderer *renderer; | |
| 2531 SDL_Window *window; | |
| 2532 SDL_Rect real_rect; | |
| 2533 | |
| 2534 renderer = SDL_GetCurrentRenderer(); | |
| 2535 if (!renderer) { | |
| 2536 return -1; | |
| 2537 } | |
| 2538 if (!renderer->RenderWritePixels) { | |
| 2539 SDL_Unsupported(); | |
| 2540 return -1; | |
| 2541 } | |
| 2542 window = SDL_GetWindowFromID(renderer->window); | |
| 2543 | |
| 2544 real_rect.x = 0; | |
| 2545 real_rect.y = 0; | |
| 2546 real_rect.w = window->w; | |
| 2547 real_rect.h = window->h; | |
| 2548 if (rect) { | |
| 2549 if (!SDL_IntersectRect(rect, &real_rect, &real_rect)) { | |
| 2550 return 0; | |
| 2551 } | |
| 2552 if (real_rect.y > rect->y) { | |
| 2553 pixels = (const Uint8 *)pixels + pitch * (real_rect.y - rect->y); | |
| 2554 } | |
| 2555 if (real_rect.x > rect->x) { | |
| 2556 Uint32 format = SDL_CurrentDisplay.current_mode.format; | |
| 2557 int bpp = SDL_BYTESPERPIXEL(format); | |
| 2558 pixels = (const Uint8 *)pixels + bpp * (real_rect.x - rect->x); | |
| 2559 } | |
| 2560 } | |
| 2561 | |
| 2562 return renderer->RenderWritePixels(renderer, &real_rect, pixels, pitch); | |
| 2563 } | |
| 2564 | |
| 2489 void | 2565 void |
| 2490 SDL_RenderPresent(void) | 2566 SDL_RenderPresent(void) |
| 2491 { | 2567 { |
| 2492 SDL_Renderer *renderer; | 2568 SDL_Renderer *renderer; |
| 2493 | 2569 |