Mercurial > sdl-ios-xcode
annotate src/video/SDL_yuv.c @ 1359:1e4ba2e063b4
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 07:03:22 +0000 |
| parents | c71e05b4dc2e |
| children | d910939febfa |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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Updated copyright information and removed rcs id lines (problematic in branch merges)
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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parents:
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15 You should have received a copy of the GNU Lesser General Public |
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c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* This is the implementation of the YUV video surface support */ | |
| 24 | |
| 25 #include "SDL_video.h" | |
| 26 #include "SDL_sysvideo.h" | |
| 27 #include "SDL_yuvfuncs.h" | |
| 28 #include "SDL_yuv_sw_c.h" | |
| 29 | |
| 30 | |
| 31 SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format, | |
| 32 SDL_Surface *display) | |
| 33 { | |
| 34 SDL_VideoDevice *video = current_video; | |
| 35 SDL_VideoDevice *this = current_video; | |
| 36 const char *yuv_hwaccel; | |
| 37 SDL_Overlay *overlay; | |
| 38 | |
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Oops, we only want to fail creation if the display surface is an OpenGL surface.
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39 if ( (display->flags & SDL_OPENGL) == SDL_OPENGL ) { |
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40 SDL_SetError("YUV overlays are not supported in OpenGL mode"); |
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41 return NULL; |
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42 } |
| 0 | 43 |
| 44 /* Display directly on video surface, if possible */ | |
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45 if ( SDL_getenv("SDL_VIDEO_YUV_DIRECT") ) { |
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46 if ( (display == SDL_PublicSurface) && |
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47 ((SDL_VideoSurface->format->BytesPerPixel == 2) || |
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48 (SDL_VideoSurface->format->BytesPerPixel == 4)) ) { |
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49 display = SDL_VideoSurface; |
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50 } |
| 0 | 51 } |
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You can't create a YUV overlay in OpenGL mode
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52 overlay = NULL; |
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53 yuv_hwaccel = SDL_getenv("SDL_VIDEO_YUV_HWACCEL"); |
| 0 | 54 if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && |
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55 (!yuv_hwaccel || (SDL_atoi(yuv_hwaccel) > 0)) ) { |
| 0 | 56 overlay = video->CreateYUVOverlay(this, w, h, format, display); |
| 57 } | |
| 58 /* If hardware YUV overlay failed ... */ | |
| 59 if ( overlay == NULL ) { | |
| 60 overlay = SDL_CreateYUV_SW(this, w, h, format, display); | |
| 61 } | |
| 62 return overlay; | |
| 63 } | |
| 64 | |
| 65 int SDL_LockYUVOverlay(SDL_Overlay *overlay) | |
| 66 { | |
| 67 return overlay->hwfuncs->Lock(current_video, overlay); | |
| 68 } | |
| 69 | |
| 70 void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) | |
| 71 { | |
| 72 overlay->hwfuncs->Unlock(current_video, overlay); | |
| 73 } | |
| 74 | |
| 75 int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) | |
| 76 { | |
| 77 return overlay->hwfuncs->Display(current_video, overlay, dstrect); | |
| 78 } | |
| 79 | |
| 80 void SDL_FreeYUVOverlay(SDL_Overlay *overlay) | |
| 81 { | |
| 82 if ( overlay ) { | |
| 83 if ( overlay->hwfuncs ) { | |
| 84 overlay->hwfuncs->FreeHW(current_video, overlay); | |
| 85 } | |
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86 SDL_free(overlay); |
| 0 | 87 } |
| 88 } |