Implement merging non-composited paint property nodes in the PACompositor.

third_party/WebKit/Source/platform/graphics/paint/PropertyTreeStateTest.cpp

+// Copyright 2016 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 "platform/graphics/paint/PropertyTreeState.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+class PropertyTreeStateTest : public ::testing::Test {};
+
+TEST_F(PropertyTreeStateTest, TrasformOnEffectOnClip) {
+  RefPtr<TransformPaintPropertyNode> transform =
+      TransformPaintPropertyNode::create(TransformPaintPropertyNode::root(),
+                                         TransformationMatrix(),
+                                         FloatPoint3D());
+
+  RefPtr<ClipPaintPropertyNode> clip = ClipPaintPropertyNode::create(
+      ClipPaintPropertyNode::root(), TransformPaintPropertyNode::root(),
+      FloatRoundedRect());
+
+  RefPtr<EffectPaintPropertyNode> effect = EffectPaintPropertyNode::create(
+      EffectPaintPropertyNode::root(), TransformPaintPropertyNode::root(),
+      clip.get(), CompositorFilterOperations(), 1.0, SkBlendMode::kSrcOver);
+
+  PropertyTreeState state(
+      TransformPaintPropertyNode::root(), ClipPaintPropertyNode::root(),
+      EffectPaintPropertyNode::root(), ScrollPaintPropertyNode::root());
+  EXPECT_EQ(PropertyTreeState::None, state.innermostNode());
+
+  state.setTransform(transform.get());

[pdr., 2016/12/20 06:46:30]

Are you creating the PropertyTreeState and then calling
setTransform/setClip/setEffect to avoid the DCHECKs about hasOneRef? If so, lets
just remove those DCHECKs or add a test-only helper to create
PropertyTreeStates.

[chrishtr, 2016/12/20 23:36:32]

No good reason, except that in an earlier iteration of the test I made use of
it. Fixed.

+  state.setClip(clip.get());
+  state.setEffect(effect.get());
+  EXPECT_EQ(PropertyTreeState::Transform, state.innermostNode());
+
+  PropertyTreeStateIterator iterator(state);
+  EXPECT_EQ(PropertyTreeState::Effect, iterator.next()->innermostNode());
+  EXPECT_EQ(PropertyTreeState::Clip, iterator.next()->innermostNode());
+  EXPECT_EQ(PropertyTreeState::None, iterator.next()->innermostNode());
+}
+
+TEST_F(PropertyTreeStateTest, EffectOnClipOnTransform) {
+  RefPtr<TransformPaintPropertyNode> transform =
+      TransformPaintPropertyNode::create(TransformPaintPropertyNode::root(),
+                                         TransformationMatrix(),
+                                         FloatPoint3D());
+
+  RefPtr<ClipPaintPropertyNode> clip = ClipPaintPropertyNode::create(
+      ClipPaintPropertyNode::root(), transform.get(), FloatRoundedRect());
+
+  RefPtr<EffectPaintPropertyNode> effect = EffectPaintPropertyNode::create(
+      EffectPaintPropertyNode::root(), transform.get(), clip.get(),
+      CompositorFilterOperations(), 1.0, SkBlendMode::kSrcOver);
+
+  PropertyTreeState state(
+      TransformPaintPropertyNode::root(), ClipPaintPropertyNode::root(),
+      EffectPaintPropertyNode::root(), ScrollPaintPropertyNode::root());
+
+  state.setTransform(transform.get());
+  state.setClip(clip.get());
+  state.setEffect(effect.get());
+  EXPECT_EQ(PropertyTreeState::Effect, state.innermostNode());
+
+  PropertyTreeStateIterator iterator(state);
+  EXPECT_EQ(PropertyTreeState::Clip, iterator.next()->innermostNode());
+  EXPECT_EQ(PropertyTreeState::Transform, iterator.next()->innermostNode());
+  EXPECT_EQ(PropertyTreeState::None, iterator.next()->innermostNode());
+}
+
+TEST_F(PropertyTreeStateTest, ClipOnEffectOnTransform) {
+  RefPtr<TransformPaintPropertyNode> transform =
+      TransformPaintPropertyNode::create(TransformPaintPropertyNode::root(),
+                                         TransformationMatrix(),
+                                         FloatPoint3D());
+
+  RefPtr<ClipPaintPropertyNode> clip = ClipPaintPropertyNode::create(
+      ClipPaintPropertyNode::root(), transform.get(), FloatRoundedRect());
+
+  RefPtr<EffectPaintPropertyNode> effect = EffectPaintPropertyNode::create(
+      EffectPaintPropertyNode::root(), transform.get(),
+      ClipPaintPropertyNode::root(), CompositorFilterOperations(), 1.0,
+      SkBlendMode::kSrcOver);
+
+  PropertyTreeState state(
+      TransformPaintPropertyNode::root(), ClipPaintPropertyNode::root(),
+      EffectPaintPropertyNode::root(), ScrollPaintPropertyNode::root());
+
+  state.setTransform(transform.get());
+  state.setClip(clip.get());
+  state.setEffect(effect.get());
+  EXPECT_EQ(PropertyTreeState::Clip, state.innermostNode());
+
+  PropertyTreeStateIterator iterator(state);
+  EXPECT_EQ(PropertyTreeState::Effect, iterator.next()->innermostNode());
+  EXPECT_EQ(PropertyTreeState::Transform, iterator.next()->innermostNode());
+  EXPECT_EQ(PropertyTreeState::None, iterator.next()->innermostNode());
+}
+
+}  // namespace blink