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-rw-r--r--code/sdl/sdl_glimp.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/code/sdl/sdl_glimp.c b/code/sdl/sdl_glimp.c
index 59c1e53..4804d31 100644
--- a/code/sdl/sdl_glimp.c
+++ b/code/sdl/sdl_glimp.c
@@ -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 );