[SDL] GPF on SDL_GetRGB
slouken at devolution.com
Tue Jan 25 09:43:53 PST 2005
> I'm faced with what must surely be a common problem - reading the color of a
> pixel on an SDL surface. I've struggled with three methods (shown below)
> gleamed from the SDL documentation and other sources on the web, but in all
> cases the program GPF's on the SDL_GetRGBA call.
Make sure surface->pixels isn't NULL, if it is, you need to lock the surface.
Make sure that x and y are not out of bounds. They range from 0 to (w or h)-1
-Sam Lantinga, Software Engineer, Blizzard Entertainment
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