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Copyright (C) 2000-2012 Philippe Troin <webmaster@fifi.org>.
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#include "SDL.h"
int SDL_LockYUVOverlay(SDL_Overlay *overlay);
int SDL_LockYUVOverlay
Much the same as SDL_LockSurface, SDL_LockYUVOverlay locks the overlay for direct access to pixel data.
Returns 0 on success, or -1 on an error.
SDL_UnlockYUVOverlay, SDL_CreateYUVOverlay, SDL_Overlay