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Some work on using accelerated alpha blits with hardware surfaces.

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From Stephane Marchesin's fork, don't know who originally wrote it.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401053
This commit is contained in:
Ryan C. Gordon 2005-04-17 10:40:41 +00:00
parent ec77fa9503
commit 8907a054cf
4 changed files with 32 additions and 5 deletions
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21
src/video/SDL_surface.c
View file

@ -91,11 +91,22 @@ SDL_Surface * SDL_CreateRGBSurface (Uint32 flags,
}
surface->flags = SDL_SWSURFACE;
if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
depth = screen->format->BitsPerPixel;
Rmask = screen->format->Rmask;
Gmask = screen->format->Gmask;
Bmask = screen->format->Bmask;
Amask = screen->format->Amask;
if ((Amask) && (video->displayformatalphapixel))
{
depth = video->displayformatalphapixel->BitsPerPixel;
Rmask = video->displayformatalphapixel->Rmask;
Gmask = video->displayformatalphapixel->Gmask;
Bmask = video->displayformatalphapixel->Bmask;
Amask = video->displayformatalphapixel->Amask;
}
else
{
depth = screen->format->BitsPerPixel;
Rmask = screen->format->Rmask;
Gmask = screen->format->Gmask;
Bmask = screen->format->Bmask;
Amask = screen->format->Amask;
}
}
surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask);
if ( surface->format == NULL ) {