annotate src/video/SDL_yuv.c @ 1336:3692456e7b0f

Use SDL_ prefixed versions of C library functions. FIXME: Change #include <stdlib.h> to #include "SDL_stdlib.h" Change #include <string.h> to #include "SDL_string.h" Make sure nothing else broke because of this...
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 06:59:48 +0000
parents 450721ad5436
children 604d73db6802
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* This is the implementation of the YUV video surface support */
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24
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25 #include "SDL_video.h"
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26 #include "SDL_error.h"
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27 #include "SDL_stdlib.h"
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28 #include "SDL_sysvideo.h"
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29 #include "SDL_yuvfuncs.h"
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30 #include "SDL_yuv_sw_c.h"
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32
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33 SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format,
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34 SDL_Surface *display)
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35 {
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36 SDL_VideoDevice *video = current_video;
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37 SDL_VideoDevice *this = current_video;
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38 const char *yuv_hwaccel;
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39 SDL_Overlay *overlay;
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40
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41 if ( (display->flags & SDL_OPENGL) == SDL_OPENGL ) {
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42 SDL_SetError("YUV overlays are not supported in OpenGL mode");
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43 return NULL;
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44 }
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45
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46 /* Display directly on video surface, if possible */
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47 if ( SDL_getenv("SDL_VIDEO_YUV_DIRECT") ) {
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48 if ( (display == SDL_PublicSurface) &&
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49 ((SDL_VideoSurface->format->BytesPerPixel == 2) ||
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50 (SDL_VideoSurface->format->BytesPerPixel == 4)) ) {
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51 display = SDL_VideoSurface;
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52 }
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53 }
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54 overlay = NULL;
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55 yuv_hwaccel = SDL_getenv("SDL_VIDEO_YUV_HWACCEL");
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56 if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) &&
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57 (!yuv_hwaccel || (*yuv_hwaccel != '0')) ) {
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58 overlay = video->CreateYUVOverlay(this, w, h, format, display);
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59 }
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60 /* If hardware YUV overlay failed ... */
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61 if ( overlay == NULL ) {
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62 overlay = SDL_CreateYUV_SW(this, w, h, format, display);
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63 }
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64 return overlay;
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65 }
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66
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67 int SDL_LockYUVOverlay(SDL_Overlay *overlay)
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68 {
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69 return overlay->hwfuncs->Lock(current_video, overlay);
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70 }
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71
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72 void SDL_UnlockYUVOverlay(SDL_Overlay *overlay)
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73 {
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74 overlay->hwfuncs->Unlock(current_video, overlay);
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75 }
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76
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77 int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect)
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78 {
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79 return overlay->hwfuncs->Display(current_video, overlay, dstrect);
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80 }
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81
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82 void SDL_FreeYUVOverlay(SDL_Overlay *overlay)
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83 {
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84 if ( overlay ) {
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85 if ( overlay->hwfuncs ) {
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86 overlay->hwfuncs->FreeHW(current_video, overlay);
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87 }
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88 SDL_free(overlay);
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89 }
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90 }