Bug 1314001 - Part 2. Draw mask by single opaque green. r=mstange

MozReview-Commit-ID: 12S5vBGYRpb

--HG--
extra : rebase_source : ef9bfa3251610732a0a6d2becb0e07737a40ac12

layout/base/nsDisplayList.cpp

@@ -7118,6 +7118,10 @@ bool nsDisplayMask::ShouldPaintOnMaskLayer(LayerManager* aManager)
     }
   }
 
+  if (gfxPrefs::DrawMaskLayer()) {
+    return false;
+  }
+
   return true;
 }
 

layout/svg/nsSVGIntegrationUtils.cpp

@@ -971,6 +971,18 @@ nsSVGIntegrationUtils::PaintMaskAndClipPath(const PaintFramesParams& aParams)
                                        aParams.builder);
   basic->SetTarget(oldCtx);
 
+  if (gfxPrefs::DrawMaskLayer()) {
+    gfxContextAutoSaveRestore saver(&context);
+
+    context.NewPath();
+    gfxRect drawingRect =
+      nsLayoutUtils::RectToGfxRect(aParams.borderArea,
+                                   frame->PresContext()->AppUnitsPerDevPixel());
+    context.Rectangle(drawingRect, true);
+    context.SetColor(Color(0.0, 1.0, 0.0, 1.0));
+    context.Fill();
+  }
+
   if (maskUsage.shouldApplyClipPath || maskUsage.shouldApplyBasicShape) {
     context.PopClip();
   }