Mercurial > sdl-ios-xcode
view src/video/SDL_yuv.c @ 4085:51486c979189 SDL-1.2
> Hi Ryan,
> I checked the list you linked to, but did not see any reference to whether
> the Win32 window centering bug was fixed... Has that been addressed at all?
> I refer to the bug where, unless one has globally set the
> SDL_WINDOW_CENTERED variable in the OS, only the 1st window that is created
> will be centered. Subsequent calls to SetVideoMode will create a window tha
t
> shares the same upper-left corner location.
I'm working on that now, thanks for reporting it. What I'm doing is if the
width and height are the same, I'm leaving the window position alone, but if
they're different they will respect the positioning environment variables.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 20 Jul 2007 03:25:40 +0000 |
parents | 9a7c62bbc8b3 |
children | a1b03ba2fcd0 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" /* This is the implementation of the YUV video surface support */ #include "SDL_video.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 ( SDL_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 = SDL_getenv("SDL_VIDEO_YUV_HWACCEL"); if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && (!yuv_hwaccel || (SDL_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) { if ( overlay == NULL ) { SDL_SetError("Passed NULL overlay"); return -1; } return overlay->hwfuncs->Lock(current_video, overlay); } void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) { if ( overlay == NULL ) { return; } overlay->hwfuncs->Unlock(current_video, overlay); } int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) { SDL_Rect src, dst; int srcx, srcy, srcw, srch; int dstx, dsty, dstw, dsth; if ( overlay == NULL || dstrect == NULL ) { SDL_SetError("Passed NULL overlay or dstrect"); return -1; } /* Clip the rectangle to the screen area */ srcx = 0; srcy = 0; srcw = overlay->w; srch = overlay->h; dstx = dstrect->x; dsty = dstrect->y; dstw = dstrect->w; dsth = dstrect->h; if ( dstx < 0 ) { srcw += (dstx * overlay->w) / dstrect->w; dstw += dstx; srcx -= (dstx * overlay->w) / dstrect->w; dstx = 0; } if ( (dstx+dstw) > current_video->screen->w ) { int extra = (dstx+dstw - current_video->screen->w); srcw -= (extra * overlay->w) / dstrect->w; dstw -= extra; } if ( dsty < 0 ) { srch += (dsty * overlay->h) / dstrect->h; dsth += dsty; srcy -= (dsty * overlay->h) / dstrect->h; dsty = 0; } if ( (dsty+dsth) > current_video->screen->h ) { int extra = (dsty+dsth - current_video->screen->h); srch -= (extra * overlay->h) / dstrect->h; dsth -= extra; } if ( srcw <= 0 || srch <= 0 || srch <= 0 || dsth <= 0 ) { return 0; } /* Ugh, I can't wait for SDL_Rect to be int values */ src.x = srcx; src.y = srcy; src.w = srcw; src.h = srch; dst.x = dstx; dst.y = dsty; dst.w = dstw; dst.h = dsth; return overlay->hwfuncs->Display(current_video, overlay, &src, &dst); } void SDL_FreeYUVOverlay(SDL_Overlay *overlay) { if ( overlay == NULL ) { return; } if ( overlay->hwfuncs ) { overlay->hwfuncs->FreeHW(current_video, overlay); } SDL_free(overlay); }