Mercurial > sdl-ios-xcode
annotate src/video/SDL_yuv.c @ 553:417f8709e648
There's a bug in the VC7 optimizer relating to the duff loop optimization
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 02 Dec 2002 02:40:58 +0000 |
| parents | f6ffac90895c |
| children | 73440ac574a2 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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f6ffac90895c
Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 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 | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* This is the implementation of the YUV video surface support */ | |
| 29 | |
| 30 #include <stdlib.h> | |
| 31 #include <string.h> | |
| 32 | |
| 33 #include "SDL_getenv.h" | |
| 34 #include "SDL_video.h" | |
| 35 #include "SDL_sysvideo.h" | |
| 36 #include "SDL_yuvfuncs.h" | |
| 37 #include "SDL_yuv_sw_c.h" | |
| 38 | |
| 39 | |
| 40 SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format, | |
| 41 SDL_Surface *display) | |
| 42 { | |
| 43 SDL_VideoDevice *video = current_video; | |
| 44 SDL_VideoDevice *this = current_video; | |
| 45 const char *yuv_hwaccel; | |
| 46 SDL_Overlay *overlay; | |
| 47 | |
| 48 overlay = NULL; | |
| 49 | |
| 50 /* Display directly on video surface, if possible */ | |
|
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1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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51 if ( getenv("SDL_VIDEO_YUV_DIRECT") ) { |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
52 if ( (display == SDL_PublicSurface) && |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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53 ((SDL_VideoSurface->format->BytesPerPixel == 2) || |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
54 (SDL_VideoSurface->format->BytesPerPixel == 4)) ) { |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
55 display = SDL_VideoSurface; |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
56 } |
| 0 | 57 } |
| 58 yuv_hwaccel = getenv("SDL_VIDEO_YUV_HWACCEL"); | |
| 59 if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && | |
| 60 (!yuv_hwaccel || (atoi(yuv_hwaccel) > 0)) ) { | |
| 61 overlay = video->CreateYUVOverlay(this, w, h, format, display); | |
| 62 } | |
| 63 /* If hardware YUV overlay failed ... */ | |
| 64 if ( overlay == NULL ) { | |
| 65 overlay = SDL_CreateYUV_SW(this, w, h, format, display); | |
| 66 } | |
| 67 return overlay; | |
| 68 } | |
| 69 | |
| 70 int SDL_LockYUVOverlay(SDL_Overlay *overlay) | |
| 71 { | |
| 72 return overlay->hwfuncs->Lock(current_video, overlay); | |
| 73 } | |
| 74 | |
| 75 void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) | |
| 76 { | |
| 77 overlay->hwfuncs->Unlock(current_video, overlay); | |
| 78 } | |
| 79 | |
| 80 int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) | |
| 81 { | |
| 82 return overlay->hwfuncs->Display(current_video, overlay, dstrect); | |
| 83 } | |
| 84 | |
| 85 void SDL_FreeYUVOverlay(SDL_Overlay *overlay) | |
| 86 { | |
| 87 if ( overlay ) { | |
| 88 if ( overlay->hwfuncs ) { | |
| 89 overlay->hwfuncs->FreeHW(current_video, overlay); | |
| 90 } | |
| 91 free(overlay); | |
| 92 } | |
| 93 } |