Reverts if you can't produce a graphics mode requested from setup menu

Fixes bug #695.


git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@1600 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/ChangeLog

@@ -1,6 +1,8 @@
 Changes towards version 0.4:
+- Attempting to set to a mode that Doesn't Work in Setup no longer ends 
+  the program (bug #695) - Michael
 - Fixed segfault when shutting down because video could not be initialized 
-  (bug #683), - Michael
+  (bug #683) - Michael
 - Fixed crash when restarting Sa-Matra battle after abort (bug #700) -Alex
 - Some cleanups, enabling successful build with GCC 4 (bug #710),
   mostly from Ville Skyttà - SvdB

sc2/src/sc2code/libs/graphics/sdl/sdl_common.c

@@ -732,10 +732,24 @@ TFB_FlushGraphics () // Only call from main thread!!
 			ClearSemaphore (DC.data.sendsignal.sem);
 			break;
 		case TFB_DRAWCOMMANDTYPE_REINITVIDEO:
-			TFB_ReInitGraphics (DC.data.reinitvideo.driver, DC.data.reinitvideo.flags, 
-					    DC.data.reinitvideo.width, DC.data.reinitvideo.height, 
-					    DC.data.reinitvideo.bpp);
-			break;
+			{
+				int oldDriver = GraphicsDriver;
+				int oldBpp = ScreenColorDepth;
+				if (TFB_ReInitGraphics (DC.data.reinitvideo.driver, DC.data.reinitvideo.flags, 
+							DC.data.reinitvideo.width, DC.data.reinitvideo.height, 
+							DC.data.reinitvideo.bpp))
+				{
+					fprintf (stderr, "Could not provide requested mode: reverting to last known driver and bpp.\n");
+					if (TFB_ReInitGraphics (oldDriver, DC.data.reinitvideo.flags,
+								DC.data.reinitvideo.width, DC.data.reinitvideo.height, 
+								oldBpp))
+					{
+						fprintf (stderr, "Couldn't reinit at that point either.  Your video has been somehow tied in knots.\n");
+						exit (-1);
+					}
+				}
+				break;
+			}
 		}
 	}