ftp://ftp.krokus.ru/pub/OpenBSD/distfiles/xscreensaver-5.01.tar.gz

[xscreensaver] / hacks / bumps.c

diff --git a/hacks/bumps.c b/hacks/bumps.c
index c9f00bb40b9c12ddfc6412d98af59ca3217bd335..2f510f5a9b5a5b15487a21ddb4e457a5e953b223 100644 (file)
--- 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 ) );
                }
        }