Implement SkImageFilter support in the compositor.

cc/render_pass.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 "cc/render_pass.h"
 
 #include "CCLayerImpl.h"
 #include "cc/math_util.h"
 #include "cc/occlusion_tracker.h"
 #include "cc/quad_culler.h"
 #include "cc/shared_quad_state.h"
 #include "cc/solid_color_draw_quad.h"
+#include "third_party/skia/include/core/SkImageFilter.h"
 
 using WebKit::WebTransformationMatrix;
 
 namespace cc {
 
 scoped_ptr<RenderPass> RenderPass::create(Id id, gfx::Rect outputRect, const WebKit::WebTransformationMatrix& transformToRootTarget)
 {
     return make_scoped_ptr(new RenderPass(id, outputRect, transformToRootTarget));
 }
 
 RenderPass::RenderPass(Id id, gfx::Rect outputRect, const WebKit::WebTransformationMatrix& transformToRootTarget)
     : m_id(id)
     , m_transformToRootTarget(transformToRootTarget)
     , m_outputRect(outputRect)
     , m_hasTransparentBackground(true)
     , m_hasOcclusionFromOutsideTargetSurface(false)
+    , m_filter(0)
 {
     DCHECK(id.layerId > 0);
     DCHECK(id.index >= 0);
 }
 
 RenderPass::~RenderPass()
 {
+    SkSafeUnref(m_filter);
 }
 
 scoped_ptr<RenderPass> RenderPass::copy(Id newId) const
 {
     DCHECK(newId != m_id);
 
     scoped_ptr<RenderPass> copyPass(create(newId, m_outputRect, m_transformToRootTarget));
     copyPass->setDamageRect(m_damageRect);
     copyPass->setHasTransparentBackground(m_hasTransparentBackground);
     copyPass->setHasOcclusionFromOutsideTargetSurface(m_hasOcclusionFromOutsideTargetSurface);
     copyPass->setFilters(m_filters);
     copyPass->setBackgroundFilters(m_backgroundFilters);
+    copyPass->setFilter(m_filter);
     return copyPass.Pass();
 }
 
 void RenderPass::appendQuadsForLayer(LayerImpl* layer, OcclusionTrackerImpl* occlusionTracker, AppendQuadsData& appendQuadsData)
 {
     const bool forSurface = false;
     QuadCuller quadCuller(m_quadList, m_sharedQuadStateList, layer, occlusionTracker, layer->hasDebugBorders(), forSurface);
 
     layer->appendQuads(quadCuller, appendQuadsData);
 }
@@ skipping 36 matching lines @@
     WebTransformationMatrix transformToLayerSpace = rootLayer->screenSpaceTransform().inverse();
     Vector<WebCore::IntRect> fillRects = fillRegion.rects();
     for (size_t i = 0; i < fillRects.size(); ++i) {
         // The root layer transform is composed of translations and scales only, no perspective, so mapping is sufficient.
         IntRect layerRect = MathUtil::mapClippedRect(transformToLayerSpace, cc::IntRect(fillRects[i]));
         // Skip the quad culler and just append the quads directly to avoid occlusion checks.
         m_quadList.append(SolidColorDrawQuad::create(sharedQuadState, layerRect, screenBackgroundColor).PassAs<DrawQuad>());
     }
 }
 
+void RenderPass::setFilter(SkImageFilter* filter) {
+    SkRefCnt_SafeAssign(m_filter, filter);
+}
+
 }  // namespace cc