Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5131 | clevermous | 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
||
| 3 | Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga |
||
| 4 | |||
| 5 | This library is free software; you can redistribute it and/or |
||
| 6 | modify it under the terms of the GNU Library General Public |
||
| 7 | License as published by the Free Software Foundation; either |
||
| 8 | version 2 of the License, or (at your option) any later version. |
||
| 9 | |||
| 10 | This library is distributed in the hope that it will be useful, |
||
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||
| 13 | Library General Public License for more details. |
||
| 14 | |||
| 15 | You should have received a copy of the GNU Library General Public |
||
| 16 | License along with this library; if not, write to the Free |
||
| 17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 18 | |||
| 19 | Sam Lantinga |
||
| 20 | slouken@devolution.com |
||
| 21 | */ |
||
| 22 | |||
| 23 | |||
| 24 | /* This is the implementation of the YUV video surface support */ |
||
| 25 | |||
| 26 | #include |
||
| 27 | #include |
||
| 28 | |||
| 29 | #include "SDL_getenv.h" |
||
| 30 | #include "SDL_video.h" |
||
| 31 | #include "SDL_sysvideo.h" |
||
| 32 | #include "SDL_yuvfuncs.h" |
||
| 33 | #include "SDL_yuv_sw_c.h" |
||
| 34 | |||
| 35 | |||
| 36 | SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format, |
||
| 37 | SDL_Surface *display) |
||
| 38 | { |
||
| 39 | SDL_VideoDevice *video = current_video; |
||
| 40 | SDL_VideoDevice *this = current_video; |
||
| 41 | const char *yuv_hwaccel; |
||
| 42 | SDL_Overlay *overlay; |
||
| 43 | |||
| 44 | overlay = NULL; |
||
| 45 | |||
| 46 | /* Display directly on video surface, if possible */ |
||
| 47 | if ( getenv("SDL_VIDEO_YUV_DIRECT") ) { |
||
| 48 | if ( (display == SDL_PublicSurface) && |
||
| 49 | ((SDL_VideoSurface->format->BytesPerPixel == 2) || |
||
| 50 | (SDL_VideoSurface->format->BytesPerPixel == 4)) ) { |
||
| 51 | display = SDL_VideoSurface; |
||
| 52 | } |
||
| 53 | } |
||
| 54 | yuv_hwaccel = getenv("SDL_VIDEO_YUV_HWACCEL"); |
||
| 55 | if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && |
||
| 56 | (!yuv_hwaccel || (atoi(yuv_hwaccel) > 0)) ) { |
||
| 57 | overlay = video->CreateYUVOverlay(this, w, h, format, display); |
||
| 58 | } |
||
| 59 | /* If hardware YUV overlay failed ... */ |
||
| 60 | if ( overlay == NULL ) { |
||
| 61 | overlay = SDL_CreateYUV_SW(this, w, h, format, display); |
||
| 62 | } |
||
| 63 | return overlay; |
||
| 64 | } |
||
| 65 | |||
| 66 | int SDL_LockYUVOverlay(SDL_Overlay *overlay) |
||
| 67 | { |
||
| 68 | return overlay->hwfuncs->Lock(current_video, overlay); |
||
| 69 | } |
||
| 70 | |||
| 71 | void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) |
||
| 72 | { |
||
| 73 | overlay->hwfuncs->Unlock(current_video, overlay); |
||
| 74 | } |
||
| 75 | |||
| 76 | int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) |
||
| 77 | { |
||
| 78 | return overlay->hwfuncs->Display(current_video, overlay, dstrect); |
||
| 79 | } |
||
| 80 | |||
| 81 | void SDL_FreeYUVOverlay(SDL_Overlay *overlay) |
||
| 82 | { |
||
| 83 | if ( overlay ) { |
||
| 84 | if ( overlay->hwfuncs ) { |
||
| 85 | overlay->hwfuncs->FreeHW(current_video, overlay); |
||
| 86 | } |
||
| 87 | free(overlay); |
||
| 88 | } |
||
| 89 | } |