I’m looking to do one of the most simple operations: blitting a 24 bit bitmap
with the color 255,0,255 defined as the SDL_SRCCOLORKEY.
I’ve looked up examples online and I appear to be doing things the same way as
others, except I notice people using 0,255,0 as their background color-- perhaps
there is a sort of inversing going on behind the scenes that I don’t know about?
Anyway the code is quite simple:
SDL_SetAlpha( ball, SDL_SRCCOLORKEY, SDL_MapRGB( screen->format, 255, 0, 255 ) );
SDL_BlitSurface( ball, NULL, screen, &dst );
The screen is created with
SDL_SetVideoMode(800, 600, 24, SDL_HWSURFACE|SDL_DOUBLEBUF);
I have tested two different bmps, one made in PSP and one made in MS Paint. The
image blits but with the background color included.
Here is an example online I found which happens to match what I am trying: