diff --git a/main/vcl/source/gdi/bitmapex.cxx b/main/vcl/source/gdi/bitmapex.cxx
index c2503da..7d86dc2 100644
--- a/main/vcl/source/gdi/bitmapex.cxx
+++ b/main/vcl/source/gdi/bitmapex.cxx
@@ -1255,44 +1255,53 @@ BitmapEx VCL_DLLPUBLIC createBlendFrame(
             pContent->SetPixel(y, x, aColorTopLeft);
             pAlpha->SetPixelIndex(y, x, nAlpha);
 
-            for(x = 1; x < nW - 1; x++) // y == 0
+            if ( nW > 1 )
             {
-                Color aMix(aColorTopLeft);
+                for ( x = 1; x < nW - 1; x++ ) // y == 0
+                {
+                    Color aMix( aColorTopLeft );
 
-                aMix.Merge(aColorTopRight, 255 - sal_uInt8((x * 255) / nW));
-                pContent->SetPixel(y, x, aMix);
-                pAlpha->SetPixelIndex(y, x, nAlpha);
+                    aMix.Merge( aColorTopRight, 255 - sal_uInt8( ( x * 255 ) / nW ) );
+                    pContent->SetPixel( y, x, aMix );
+                    pAlpha->SetPixelIndex( y, x, nAlpha );
+                }
             }
 
             // x == nW - 1, y == 0
             pContent->SetPixel(y, x, aColorTopRight);
             pAlpha->SetPixelIndex(y, x, nAlpha);
 
-            for(y = 1; y < nH - 1; y++) // x == 0 and nW - 1
+            if ( nH > 1 )
             {
-                Color aMixA(aColorTopLeft);
-                Color aMixB(aColorTopRight);
+                for ( y = 1; y < nH - 1; y++ ) // x == 0 and nW - 1
+                {
+                    Color aMixA( aColorTopLeft );
+                    Color aMixB( aColorTopRight );
 
-                aMixA.Merge(aColorBottomLeft, 255 - sal_uInt8((y * 255) / nH));
-                pContent->SetPixel(y, 0, aMixA);
-                pAlpha->SetPixelIndex(y, 0, nAlpha);
+                    aMixA.Merge( aColorBottomLeft, 255 - sal_uInt8( ( y * 255 ) / nH ) );
+                    pContent->SetPixel( y, 0, aMixA );
+                    pAlpha->SetPixelIndex( y, 0, nAlpha );
 
-                aMixB.Merge(aColorBottomRight, 255 - sal_uInt8((y * 255) / nH));
-                pContent->SetPixel(y, nW - 1, aMixB);
-                pAlpha->SetPixelIndex(y, nW - 1, nAlpha);
+                    aMixB.Merge( aColorBottomRight, 255 - sal_uInt8( ( y * 255 ) / nH ) );
+                    pContent->SetPixel( y, nW - 1, aMixB );
+                    pAlpha->SetPixelIndex( y, nW - 1, nAlpha );
+                }
             }
 
             x = 0; // x == 0, y == nH - 1
             pContent->SetPixel(y, x, aColorBottomLeft);
             pAlpha->SetPixelIndex(y, x, nAlpha);
 
-            for(x = 1; x < nW - 1; x++) // y == nH - 1
+            if ( nW > 1 )
             {
-                Color aMix(aColorBottomLeft);
+                for ( x = 1; x < nW - 1; x++ ) // y == nH - 1
+                {
+                    Color aMix( aColorBottomLeft );
 
-                aMix.Merge(aColorBottomRight, 255 - sal_uInt8(((x - 0)* 255) / nW));
-                pContent->SetPixel(y, x, aMix);
-                pAlpha->SetPixelIndex(y, x, nAlpha);
+                    aMix.Merge( aColorBottomRight, 255 - sal_uInt8( ( ( x - 0 ) * 255 ) / nW ) );
+                    pContent->SetPixel( y, x, aMix );
+                    pAlpha->SetPixelIndex( y, x, nAlpha );
+                }
             }
 
             // x == nW - 1, y == nH - 1