Implement SkImageFilter support in the compositor.

cc/layer_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "CCLayerImpl.h"
 
 #include "CCDebugBorderDrawQuad.h"
 #include "CCLayerSorter.h"
 #include "base/debug/trace_event.h"
 #include "base/stringprintf.h"
 #include "cc/math_util.h"
 #include "cc/proxy.h"
 #include "cc/quad_sink.h"
 #include "cc/scrollbar_animation_controller.h"
 #include "cc/settings.h"
+#include "third_party/skia/include/core/SkImageFilter.h"
 
 using WebKit::WebTransformationMatrix;
 
 namespace cc {
 
 LayerImpl::LayerImpl(int id)
     : m_parent(0)
     , m_maskLayerId(-1)
     , m_replicaLayerId(-1)
     , m_layerId(id)
@@ skipping 17 matching lines @@
     , m_drawsContent(false)
     , m_forceRenderSurface(false)
     , m_isContainerForFixedPositionLayers(false)
     , m_fixedToContainerLayer(false)
     , m_renderTarget(0)
     , m_drawDepth(0)
     , m_drawOpacity(0)
     , m_drawOpacityIsAnimating(false)
     , m_debugBorderColor(0)
     , m_debugBorderWidth(0)
+    , m_filter(0)
     , m_drawTransformIsAnimating(false)
     , m_screenSpaceTransformIsAnimating(false)
 #ifndef NDEBUG
     , m_betweenWillDrawAndDidDraw(false)
 #endif
     , m_layerAnimationController(LayerAnimationController::create(this))
 {
     DCHECK(Proxy::isImplThread());
     DCHECK(m_layerId > 0);
 }
 
 LayerImpl::~LayerImpl()
 {
     DCHECK(Proxy::isImplThread());
 #ifndef NDEBUG
     DCHECK(!m_betweenWillDrawAndDidDraw);
 #endif
+    SkSafeUnref(m_filter);
 }
 
 void LayerImpl::addChild(scoped_ptr<LayerImpl> child)
 {
     child->setParent(this);
     m_children.append(child.Pass());
 }
 
 void LayerImpl::removeFromParent()
 {
@@ skipping 384 matching lines @@
 {
     if (m_backgroundColor == backgroundColor)
         return;
 
     m_backgroundColor = backgroundColor;
     m_layerPropertyChanged = true;
 }
 
 void LayerImpl::setFilters(const WebKit::WebFilterOperations& filters)
 {
+    DCHECK(!m_filter);
     if (m_filters == filters)
         return;
 
     m_filters = filters;
     noteLayerPropertyChangedForSubtree();
 }
 
 void LayerImpl::setBackgroundFilters(const WebKit::WebFilterOperations& backgroundFilters)
 {
     if (m_backgroundFilters == backgroundFilters)
         return;
 
     m_backgroundFilters = backgroundFilters;
     m_layerPropertyChanged = true;
 }
 
+void LayerImpl::setFilter(SkImageFilter* filter)
+{
+    DCHECK(m_filters.isEmpty());
+    if (m_filter == filter)
+        return;
+
+    SkRefCnt_SafeAssign(m_filter, filter);
+    noteLayerPropertyChangedForSubtree();
+}
+
 void LayerImpl::setMasksToBounds(bool masksToBounds)
 {
     if (m_masksToBounds == masksToBounds)
         return;
 
     m_masksToBounds = masksToBounds;
     noteLayerPropertyChangedForSubtree();
 }
 
 void LayerImpl::setContentsOpaque(bool opaque)
@@ skipping 169 matching lines @@
 
 void LayerImpl::setVerticalScrollbarLayer(ScrollbarLayerImpl* scrollbarLayer)
 {
     if (!m_scrollbarAnimationController)
         m_scrollbarAnimationController = ScrollbarAnimationController::create(this);
     m_scrollbarAnimationController->setVerticalScrollbarLayer(scrollbarLayer);
     m_scrollbarAnimationController->updateScrollOffset(this);
 }
 
 }