mix-blend-mode implementation for accelerated layers - blink part

Source/core/platform/graphics/GraphicsLayer.cpp

Index: Source/core/platform/graphics/GraphicsLayer.cpp
diff --git a/Source/core/platform/graphics/GraphicsLayer.cpp b/Source/core/platform/graphics/GraphicsLayer.cpp
index 669fb7db22a5254307525909fb4dc3e8fc3fed5a..31ceb7a3f124bdbf731c4f9a633df44ff8c5c66a 100644
--- a/Source/core/platform/graphics/GraphicsLayer.cpp
+++ b/Source/core/platform/graphics/GraphicsLayer.cpp
@@ -83,12 +83,14 @@ GraphicsLayer::GraphicsLayer(GraphicsLayerClient* client)
     , m_anchorPoint(0.5f, 0.5f, 0)
     , m_opacity(1)
     , m_zPosition(0)
+    , m_blendMode(BlendModeNormal)
     , m_contentsOpaque(false)
     , m_preserves3D(false)
     , m_backfaceVisibility(true)
     , m_masksToBounds(false)
     , m_drawsContent(false)
     , m_contentsVisible(true)
+    , m_isRootForIsolatedGroup(false)
     , m_hasScrollParent(false)
     , m_hasClipParent(false)
     , m_paintingPhase(GraphicsLayerPaintAllWithOverflowClip)
@@ -593,6 +595,16 @@ void GraphicsLayer::dumpProperties(TextStream& ts, int indent, LayerTreeFlags fl
         ts << "(opacity " << m_opacity << ")\n";
     }
 
+    if (m_blendMode != BlendModeNormal) {
+        writeIndent(ts, indent + 1);
+        ts << "(blendMode " << compositeOperatorName(CompositeSourceOver, m_blendMode) << ")\n";
+    }
+
+    if (m_isRootForIsolatedGroup) {
+        writeIndent(ts, indent + 1);
+        ts << "(isolate " << m_isRootForIsolatedGroup << ")\n";
+    }
+
     if (m_contentsOpaque) {
         writeIndent(ts, indent + 1);
         ts << "(contentsOpaque " << m_contentsOpaque << ")\n";
@@ -929,6 +941,22 @@ void GraphicsLayer::setOpacity(float opacity)
     platformLayer()->setOpacity(opacity);
 }
 
+void GraphicsLayer::setBlendMode(BlendMode blendMode)
+{
+    if (m_blendMode == blendMode)
+        return;
+    m_blendMode = blendMode;
+    platformLayer()->setBlendMode(WebKit::WebBlendMode(blendMode));
+}
+
+void GraphicsLayer::setIsRootForIsolatedGroup(bool isolated)
+{
+    if (m_isRootForIsolatedGroup == isolated)
+        return;
+    m_isRootForIsolatedGroup = isolated;
+    platformLayer()->setIsRootForIsolatedGroup(isolated);
+}
+
 void GraphicsLayer::setContentsNeedsDisplay()
 {
     if (WebLayer* contentsLayer = contentsLayerIfRegistered()) {