Related: #i121534# avoid expensive emulation of 1bit masks for Mac's Quartz

(cherry picked from commit 194c7ff9)

Change-Id: I28a31c5abb14ceb72dc290e6ed2161c0ef6592df

drawinglayer/source/primitive2d/graphicprimitivehelper2d.cxx

@@ -179,7 +179,11 @@ namespace
 
                 // create BitmapEx
                 Bitmap aMainBitmap = aVirtualDevice.GetBitmap(Point(), aVirtualDevice.GetOutputSizePixel());
-                Bitmap aMaskBitmap = aVirtualDeviceMask.GetBitmap(Point(), aVirtualDeviceMask.GetOutputSizePixel());
+#if defined(MACOSX)
+                AlphaMask aMaskBitmap( aVirtualDeviceMask.GetBitmap( Point(), aVirtualDeviceMask.GetOutputSizePixel()));
+#else
+                Bitmap aMaskBitmap = aVirtualDeviceMask.GetBitmap( Point(), aVirtualDeviceMask.GetOutputSizePixel());
+#endif
                 aNextStep.maBitmapEx = BitmapEx(aMainBitmap, aMaskBitmap);
 
                 // add to vector

drawinglayer/source/processor2d/vclprocessor2d.cxx

@@ -464,7 +464,12 @@ namespace drawinglayer
             {
                 // parts will be uncovered, extend aBitmapEx with a mask bitmap
                 const Bitmap aContent(aBitmapEx.GetBitmap());
-                aBitmapEx = BitmapEx(aContent, Bitmap(aContent.GetSizePixel(), 1));
+#if defined(MACOSX)
+                const AlphaMask aMaskBmp( aContent.GetSizePixel());
+#else
+                const Bitmap aMaskBmp( aContent.GetSizePixel(), 1);
+#endif
+                aBitmapEx = BitmapEx(aContent, aMaskBmp);
             }
 
             // draw using OutputDevice'sDrawTransformedBitmapEx