Mercurial > sdl-ios-xcode
annotate src/video/SDL_yuv.c @ 353:d47637068e52
The documented error return value for SDL_WaitEvent() is 0.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Mon, 15 Apr 2002 04:53:41 +0000 |
parents | f6ffac90895c |
children | 73440ac574a2 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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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 | |
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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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51 if ( getenv("SDL_VIDEO_YUV_DIRECT") ) { |
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52 if ( (display == SDL_PublicSurface) && |
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53 ((SDL_VideoSurface->format->BytesPerPixel == 2) || |
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54 (SDL_VideoSurface->format->BytesPerPixel == 4)) ) { |
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55 display = SDL_VideoSurface; |
1a2723474f12
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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 } |