- Added r_mode -2 for using display resolution.

- Changed q3_ui's very high video settings use display resolution.

code/sdl/sdl_glimp.c

@@ -248,6 +248,16 @@ static int GLimp_SetMode(int mode, qboolean fullscreen, qboolean noborder)
 		}
 	}
 
+	if( videoInfo->current_h > 0 ) {
+		glConfig.vidWidth = videoInfo->current_w;
+		glConfig.vidHeight = videoInfo->current_h;
+	} else {
+		glConfig.vidWidth = 480;
+		glConfig.vidHeight = 640;
+		ri.Printf( PRINT_ALL,
+				"Cannot determine display resolution, assuming 640x480\n" );
+	}
+
 	ri.Printf (PRINT_ALL, "...setting mode %d:", mode );
 
 	if ( !R_GetModeInfo( &glConfig.vidWidth, &glConfig.vidHeight, &glConfig.windowAspect, mode ) )