X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fbumps.c;h=2f510f5a9b5a5b15487a21ddb4e457a5e953b223;hp=c9f00bb40b9c12ddfc6412d98af59ca3217bd335;hb=07faf451b99879183ed7e909e43a0e065be1ee7f;hpb=49f5b54f312fe4ac2e9bc47581a72451bd0e8439

diff --git a/hacks/bumps.c b/hacks/bumps.c
index c9f00bb4..2f510f5a 100644
--- a/hacks/bumps.c
+++ b/hacks/bumps.c
@@ -346,7 +346,7 @@ static void InitBumpMap_2(Display *dpy, SBumps *pBumps)
 	while( nSoften-- )
 		softenMultiplier *= 1.0f + ( 1.0f / 3.0f );	/* Softening takes the max height down, so scale up to compensate. */
 	maxHeight = pBumps->SpotLight.nLightRadius * softenMultiplier;
-	nAverager = ( 3 * 0xFFFF ) / maxHeight;
+	nAverager = maxHeight ? ( 3 * 0xFFFF ) / maxHeight : 0;
 
 	pBump = pBumps->aBumpMap;
 	if( bInvert )	/* Funny, it's actually the 'else' that inverts the bump map... */
@@ -361,7 +361,7 @@ static void InitBumpMap_2(Display *dpy, SBumps *pBumps)
 
 			pColor = pBumps->xColors;
 			for( iWidth=pBumps->iWinWidth; iWidth; --iWidth, ++pColor, ++pBump )
-				*pBump = ( ( pColor->red + pColor->green + pColor->blue ) / nAverager );
+			  *pBump = ( nAverager ? ( pColor->red + pColor->green + pColor->blue ) / nAverager : 0 );
 		}
 	}
 	else
@@ -376,7 +376,7 @@ static void InitBumpMap_2(Display *dpy, SBumps *pBumps)
 	
 			pColor = pBumps->xColors;
 			for( iWidth=pBumps->iWinWidth; iWidth; --iWidth, ++pColor, ++pBump )
-				*pBump = ( maxHeight - ( ( pColor->red + pColor->green + pColor->blue ) / nAverager ) );
+			  *pBump = ( maxHeight - ( nAverager ? ( pColor->red + pColor->green + pColor->blue ) / nAverager : 0 ) );
 		}
 	}