Mercurial > sdl-ios-xcode
view src/video/SDL_yuv.c @ 833:31fa08b36380
Added support for SDL_VIDEO_WINDOW_POS and SDL_VIDEO_CENTERED on Windows
author | Sam Lantinga <slouken@libsdl.org> |
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date | Mon, 16 Feb 2004 21:09:24 +0000 |
parents | b8d311d90021 |
children | c9b51268668f |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* This is the implementation of the YUV video surface support */ #include <stdlib.h> #include <string.h> #include "SDL_getenv.h" #include "SDL_video.h" #include "SDL_error.h" #include "SDL_sysvideo.h" #include "SDL_yuvfuncs.h" #include "SDL_yuv_sw_c.h" SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format, SDL_Surface *display) { SDL_VideoDevice *video = current_video; SDL_VideoDevice *this = current_video; const char *yuv_hwaccel; SDL_Overlay *overlay; if ( (display->flags & SDL_OPENGL) == SDL_OPENGL ) { SDL_SetError("YUV overlays are not supported in OpenGL mode"); return NULL; } /* Display directly on video surface, if possible */ if ( getenv("SDL_VIDEO_YUV_DIRECT") ) { if ( (display == SDL_PublicSurface) && ((SDL_VideoSurface->format->BytesPerPixel == 2) || (SDL_VideoSurface->format->BytesPerPixel == 4)) ) { display = SDL_VideoSurface; } } overlay = NULL; yuv_hwaccel = getenv("SDL_VIDEO_YUV_HWACCEL"); if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && (!yuv_hwaccel || (atoi(yuv_hwaccel) > 0)) ) { overlay = video->CreateYUVOverlay(this, w, h, format, display); } /* If hardware YUV overlay failed ... */ if ( overlay == NULL ) { overlay = SDL_CreateYUV_SW(this, w, h, format, display); } return overlay; } int SDL_LockYUVOverlay(SDL_Overlay *overlay) { return overlay->hwfuncs->Lock(current_video, overlay); } void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) { overlay->hwfuncs->Unlock(current_video, overlay); } int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) { return overlay->hwfuncs->Display(current_video, overlay, dstrect); } void SDL_FreeYUVOverlay(SDL_Overlay *overlay) { if ( overlay ) { if ( overlay->hwfuncs ) { overlay->hwfuncs->FreeHW(current_video, overlay); } free(overlay); } }