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Fix SGI systems choosing an inefficient 36-bit color visual. 

Now they'll choose 16 or 32 bit correctly with this magic.

  Fixes Bugzilla #4245.
This commit is contained in:
Ryan C. Gordon 2009-09-15 01:01:07 +00:00
parent d47be89f0a
commit 842f27818b
1 changed files with 8 additions and 0 deletions
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8
code/sdl/sdl_glimp.c
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@ -337,6 +337,14 @@ static int GLimp_SetMode( int mode, qboolean fullscreen )
if (tcolorbits == 24)
sdlcolorbits = 8;
#ifdef __sgi /* Fix for SGIs grabbing too many bits of color */
if (sdlcolorbits == 4)
sdlcolorbits = 0; /* Use minimum size for 16-bit color */
/* Need alpha or else SGIs choose 36+ bit RGB mode */
SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 1);
#endif
SDL_GL_SetAttribute( SDL_GL_RED_SIZE, sdlcolorbits );
SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, sdlcolorbits );
SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, sdlcolorbits );