Bug 902525 - Part 5: fixes for blending of HTML elements r=roc

2013-09-15 16:43:10 -07:00
parent c5421a9d14
commit 369ddec69f
3 changed files with 7 additions and 3 deletions
--- a/gfx/layers/basic/BasicImageLayer.cpp
+++ b/gfx/layers/basic/BasicImageLayer.cpp
@@ -110,7 +110,9 @@ BasicImageLayer::GetAndPaintCurrentImage(gfxContext* aContext,
  // The visible region can extend outside the image, so just draw
  // within the image bounds.
  if (aContext) {
-    AutoSetOperator setOperator(aContext, GetOperator());
+    gfxContext::GraphicsOperator mixBlendMode = GetEffectiveMixBlendMode();
+    AutoSetOperator setOptimizedOperator(aContext, mixBlendMode != gfxContext::OPERATOR_OVER ? mixBlendMode : GetOperator());
+
    PaintContext(pat,
                 nsIntRegion(nsIntRect(0, 0, size.width, size.height)),
                 aOpacity, aContext, aMaskLayer);