[quake3-commits] r1604 - trunk/code/sdl

[DONOTREPLY at icculus.org]

Author: icculus
Date: 2009-09-14 21:01:07 -0400 (Mon, 14 Sep 2009)
New Revision: 1604

Modified:
   trunk/code/sdl/sdl_glimp.c
Log:
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.


Modified: trunk/code/sdl/sdl_glimp.c
===================================================================
--- trunk/code/sdl/sdl_glimp.c	2009-09-15 00:53:02 UTC (rev 1603)
+++ trunk/code/sdl/sdl_glimp.c	2009-09-15 01:01:07 UTC (rev 1604)
@@ -337,6 +337,14 @@
 		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 );