mix-blend-mode implementation for accelerated layers

cc/layers/layer_impl_unittest.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 "cc/layers/layer_impl.h"
 
 #include "cc/output/filter_operation.h"
 #include "cc/output/filter_operations.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 22 matching lines @@
   EXPECT_FALSE(child->LayerPropertyChanged());                                 \
   EXPECT_FALSE(grand_child->LayerPropertyChanged());
 
 #define EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(code_to_test)                    \
   root->ResetAllChangeTrackingForSubtree();                                    \
   code_to_test;                                                                \
   EXPECT_TRUE(root->LayerPropertyChanged());                                   \
   EXPECT_FALSE(child->LayerPropertyChanged());                                 \
   EXPECT_FALSE(grand_child->LayerPropertyChanged());
 
+#define EXECUTE_AND_VERIFY_ONLY_DESCENDANTS_CHANGED(code_to_test)              \
+  root->ResetAllChangeTrackingForSubtree();                                    \
+  code_to_test;                                                                \
+  EXPECT_FALSE(root->LayerPropertyChanged());                                  \
+  EXPECT_TRUE(child->LayerPropertyChanged());                                  \
+  EXPECT_TRUE(grand_child->LayerPropertyChanged());
+
 #define VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(code_to_test)                      \
   root->ResetAllChangeTrackingForSubtree();                                    \
   host_impl.ForcePrepareToDraw();                                              \
   EXPECT_FALSE(host_impl.active_tree()->needs_update_draw_properties());       \
   code_to_test;                                                                \
   EXPECT_TRUE(host_impl.active_tree()->needs_update_draw_properties());
 
 #define VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(code_to_test)                   \
   root->ResetAllChangeTrackingForSubtree();                                    \
   host_impl.ForcePrepareToDraw();                                              \
@@ skipping 31 matching lines @@
   gfx::Point arbitrary_point = gfx::Point(333, 444);
   gfx::Vector2d arbitrary_vector2d = gfx::Vector2d(111, 222);
   gfx::Rect arbitrary_rect = gfx::Rect(arbitrary_point, arbitrary_size);
   gfx::RectF arbitrary_rect_f =
       gfx::RectF(arbitrary_point_f, gfx::SizeF(1.234f, 5.678f));
   SkColor arbitrary_color = SkColorSetRGB(10, 20, 30);
   gfx::Transform arbitrary_transform;
   arbitrary_transform.Scale3d(0.1f, 0.2f, 0.3f);
   FilterOperations arbitrary_filters;
   arbitrary_filters.Append(FilterOperation::CreateOpacityFilter(0.5f));
+  SkXfermode::Mode arbitrary_blend_mode = SkXfermode::kMultiply_Mode;
 
   // These properties are internal, and should not be considered "change" when
   // they are used.
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->set_update_rect(arbitrary_rect_f));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetMaxScrollOffset(arbitrary_vector2d));
 
   // Changing these properties affects the entire subtree of layers.
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetAnchorPoint(arbitrary_point_f));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetAnchorPointZ(arbitrary_number));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetFilters(arbitrary_filters));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetFilters(FilterOperations()));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(
       root->SetMaskLayer(LayerImpl::Create(host_impl.active_tree(), 4)));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetMasksToBounds(true));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetContentsOpaque(true));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(
       root->SetReplicaLayer(LayerImpl::Create(host_impl.active_tree(), 5)));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetPosition(arbitrary_point_f));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetPreserves3d(true));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(
       root->SetDoubleSided(false));  // constructor initializes it to "true".
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->ScrollBy(arbitrary_vector2d));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetScrollDelta(gfx::Vector2d()));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetScrollOffset(arbitrary_vector2d));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetHideLayerAndSubtree(true));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetOpacity(arbitrary_number));
+  EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetBlendMode(arbitrary_blend_mode));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetTransform(arbitrary_transform));
 
   // Changing these properties only affects the layer itself.
   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(root->SetContentBounds(arbitrary_size));
   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(
       root->SetContentsScale(arbitrary_number, arbitrary_number));
   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(root->SetDrawsContent(true));
   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(
       root->SetBackgroundColor(arbitrary_color));
   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(
       root->SetBackgroundFilters(arbitrary_filters));
 
-  // Special case: check that sublayer transform changes all layer's
-  // descendants, but not the layer itself.
-  root->ResetAllChangeTrackingForSubtree();
-  root->SetSublayerTransform(arbitrary_transform);
-  EXPECT_FALSE(root->LayerPropertyChanged());
-  EXPECT_TRUE(child->LayerPropertyChanged());
-  EXPECT_TRUE(grand_child->LayerPropertyChanged());
+  // Changing these properties affects all layer's descendants,
+  // but not the layer itself.
+  EXECUTE_AND_VERIFY_ONLY_DESCENDANTS_CHANGED(
+      root->SetSublayerTransform(arbitrary_transform));
 
   // Special case: check that SetBounds changes behavior depending on
   // masksToBounds.
   root->SetMasksToBounds(false);
   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(root->SetBounds(gfx::Size(135, 246)));
   root->SetMasksToBounds(true);
   // Should be a different size than previous call, to ensure it marks tree
   // changed.
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetBounds(arbitrary_size));
 
+  EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
+      root->SetIsRootForIsolatedGroup(true));
+
   // After setting all these properties already, setting to the exact same
   // values again should not cause any change.
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetAnchorPoint(arbitrary_point_f));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetAnchorPointZ(arbitrary_number));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetMasksToBounds(true));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetPosition(arbitrary_point_f));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetPreserves3d(true));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetTransform(arbitrary_transform));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetDoubleSided(false));  // constructor initializes it to "true".
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetScrollDelta(gfx::Vector2d()));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetScrollOffset(arbitrary_vector2d));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetContentBounds(arbitrary_size));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetContentsScale(arbitrary_number, arbitrary_number));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetContentsOpaque(true));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetOpacity(arbitrary_number));
+  EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
+      root->SetBlendMode(arbitrary_blend_mode));
+  EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
+      root->SetIsRootForIsolatedGroup(true));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetDrawsContent(true));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
       root->SetSublayerTransform(arbitrary_transform));
   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetBounds(arbitrary_size));
 }
 
 TEST(LayerImplTest, VerifyNeedsUpdateDrawProperties) {
   FakeImplProxy proxy;
   FakeLayerTreeHostImpl host_impl(&proxy);
   EXPECT_TRUE(host_impl.InitializeRenderer(CreateFakeOutputSurface()));
   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl.active_tree(), 1);
   root->SetScrollable(true);
 
   gfx::PointF arbitrary_point_f = gfx::PointF(0.125f, 0.25f);
   float arbitrary_number = 0.352f;
   gfx::Size arbitrary_size = gfx::Size(111, 222);
   gfx::Point arbitrary_point = gfx::Point(333, 444);
   gfx::Vector2d arbitrary_vector2d = gfx::Vector2d(111, 222);
   gfx::Vector2d large_vector2d = gfx::Vector2d(1000, 1000);
   gfx::Rect arbitrary_rect = gfx::Rect(arbitrary_point, arbitrary_size);
   gfx::RectF arbitrary_rect_f =
       gfx::RectF(arbitrary_point_f, gfx::SizeF(1.234f, 5.678f));
   SkColor arbitrary_color = SkColorSetRGB(10, 20, 30);
   gfx::Transform arbitrary_transform;
   arbitrary_transform.Scale3d(0.1f, 0.2f, 0.3f);
   FilterOperations arbitrary_filters;
   arbitrary_filters.Append(FilterOperation::CreateOpacityFilter(0.5f));
+  SkXfermode::Mode arbitrary_blend_mode = SkXfermode::kMultiply_Mode;
 
   // Related filter functions.
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(FilterOperations()));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
 
   // Related scrolling functions.
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetMaxScrollOffset(large_vector2d));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
@@ skipping 24 matching lines @@
       root->SetDoubleSided(false));  // constructor initializes it to "true".
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetContentBounds(arbitrary_size));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetContentsScale(arbitrary_number, arbitrary_number));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetDrawsContent(true));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetBackgroundColor(arbitrary_color));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetBackgroundFilters(arbitrary_filters));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetOpacity(arbitrary_number));
+  VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetBlendMode(arbitrary_blend_mode));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetTransform(arbitrary_transform));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetSublayerTransform(arbitrary_transform));
   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetBounds(arbitrary_size));
 
   // Unrelated functions, set to the same values, no needs update.
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetAnchorPointZ(arbitrary_number));
+  VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetIsRootForIsolatedGroup(true));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetMasksToBounds(true));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetContentsOpaque(true));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetPosition(arbitrary_point_f));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetPreserves3d(true));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetDoubleSided(false));  // constructor initializes it to "true".
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetContentBounds(arbitrary_size));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetContentsScale(arbitrary_number, arbitrary_number));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetDrawsContent(true));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetBackgroundColor(arbitrary_color));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetBackgroundFilters(arbitrary_filters));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetOpacity(arbitrary_number));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
+      root->SetBlendMode(arbitrary_blend_mode));
+  VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetIsRootForIsolatedGroup(true));
+  VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetTransform(arbitrary_transform));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetSublayerTransform(arbitrary_transform));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetBounds(arbitrary_size));
 }
 
 TEST(LayerImplTest, SafeOpaqueBackgroundColor) {
   FakeImplProxy proxy;
   FakeLayerTreeHostImpl host_impl(&proxy);
   EXPECT_TRUE(host_impl.InitializeRenderer(CreateFakeOutputSurface()));
@@ skipping 274 matching lines @@
   layer()->SetMaxScrollOffset(max_scroll_offset);
   layer()->SetScrollOffset(scroll_offset);
   gfx::Vector2dF unscrolled = layer()->ScrollBy(scroll_delta);
 
   EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 8.5f), unscrolled);
   EXPECT_VECTOR_EQ(gfx::Vector2dF(30.5f, 5), layer()->TotalScrollOffset());
 }
 
 }  // namespace
 }  // namespace cc