X11. /blah/sdl/src/video/x11/SDL_x11video.c
Quote:
/* X11 based SDL video driver implementation.
Note: This implementation does not currently need X11 thread locking,
since the event thread uses a separate X connection and any
additional locking necessary is handled internally. However,
if full locking is neccessary, take a look at XInitThreads().
*/
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I shall start there then.... TBC
And I also read
http://www.libsdl.org/docs/html/sdlsetcolors.html