Enable webkit_compositor_unittests

webkit/compositor/TreeSynchronizerTest.cpp

Index: webkit/compositor/TreeSynchronizerTest.cpp
diff --git a/webkit/compositor/TreeSynchronizerTest.cpp b/webkit/compositor/TreeSynchronizerTest.cpp
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+// 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 "TreeSynchronizer.h"
+
+#include "CCAnimationTestCommon.h"
+#include "CCLayerAnimationController.h"
+#include "CCLayerImpl.h"
+#include "CCProxy.h"
+#include "CCSingleThreadProxy.h"
+#include "LayerChromium.h"
+#include "Region.h"
+#include <gtest/gtest.h>
+
+using namespace WebCore;
+using namespace WebKitTests;
+
+namespace {
+
+class MockCCLayerImpl : public CCLayerImpl {
+public:
+    static PassOwnPtr<MockCCLayerImpl> create(int layerId)
+    {
+        return adoptPtr(new MockCCLayerImpl(layerId));
+    }
+    virtual ~MockCCLayerImpl()
+    {
+        if (m_ccLayerDestructionList)
+            m_ccLayerDestructionList->append(id());
+    }
+
+    void setCCLayerDestructionList(Vector<int>* list) { m_ccLayerDestructionList = list; }
+
+private:
+    MockCCLayerImpl(int layerId)
+        : CCLayerImpl(layerId)
+        , m_ccLayerDestructionList(0)
+    {
+    }
+
+    Vector<int>* m_ccLayerDestructionList;
+};
+
+class MockLayerChromium : public LayerChromium {
+public:
+    static PassRefPtr<MockLayerChromium> create(Vector<int>* ccLayerDestructionList)
+    {
+        return adoptRef(new MockLayerChromium(ccLayerDestructionList));
+    }
+
+    virtual ~MockLayerChromium() { }
+
+    virtual PassOwnPtr<CCLayerImpl> createCCLayerImpl() OVERRIDE
+    {
+        return MockCCLayerImpl::create(m_layerId);
+    }
+
+    virtual void pushPropertiesTo(CCLayerImpl* ccLayer) OVERRIDE
+    {
+        LayerChromium::pushPropertiesTo(ccLayer);
+
+        MockCCLayerImpl* mockCCLayer = static_cast<MockCCLayerImpl*>(ccLayer);
+        mockCCLayer->setCCLayerDestructionList(m_ccLayerDestructionList);
+    }
+private:
+    MockLayerChromium(Vector<int>* ccLayerDestructionList)
+        : LayerChromium()
+        , m_ccLayerDestructionList(ccLayerDestructionList)
+    {
+    }
+
+    Vector<int>* m_ccLayerDestructionList;
+};
+
+class FakeLayerAnimationController : public CCLayerAnimationController {
+public:
+    static PassOwnPtr<FakeLayerAnimationController> create(CCLayerAnimationControllerClient* client)
+    {
+        return adoptPtr(new FakeLayerAnimationController(client));
+    }
+
+    bool synchronizedAnimations() const { return m_synchronizedAnimations; }
+
+private:
+    explicit FakeLayerAnimationController(CCLayerAnimationControllerClient* client)
+        : CCLayerAnimationController(client)
+        , m_synchronizedAnimations(false)
+    {
+    }
+
+    virtual void pushAnimationUpdatesTo(CCLayerAnimationController* controllerImpl)
+    {
+        CCLayerAnimationController::pushAnimationUpdatesTo(controllerImpl);
+        m_synchronizedAnimations = true;
+    }
+
+    bool m_synchronizedAnimations;
+};
+
+void expectTreesAreIdentical(LayerChromium* layer, CCLayerImpl* ccLayer, CCLayerTreeHostImpl* hostImpl)
+{
+    ASSERT_TRUE(layer);
+    ASSERT_TRUE(ccLayer);
+
+    EXPECT_EQ(layer->id(), ccLayer->id());
+    EXPECT_EQ(ccLayer->layerTreeHostImpl(), hostImpl);
+
+    EXPECT_EQ(layer->nonFastScrollableRegion(), ccLayer->nonFastScrollableRegion());
+
+    ASSERT_EQ(!!layer->maskLayer(), !!ccLayer->maskLayer());
+    if (layer->maskLayer())
+        expectTreesAreIdentical(layer->maskLayer(), ccLayer->maskLayer(), hostImpl);
+
+    ASSERT_EQ(!!layer->replicaLayer(), !!ccLayer->replicaLayer());
+    if (layer->replicaLayer())
+        expectTreesAreIdentical(layer->replicaLayer(), ccLayer->replicaLayer(), hostImpl);
+
+    const Vector<RefPtr<LayerChromium> >& layerChildren = layer->children();
+    const Vector<OwnPtr<CCLayerImpl> >& ccLayerChildren = ccLayer->children();
+
+    ASSERT_EQ(layerChildren.size(), ccLayerChildren.size());
+
+    for (size_t i = 0; i < layerChildren.size(); ++i)
+        expectTreesAreIdentical(layerChildren[i].get(), ccLayerChildren[i].get(), hostImpl);
+}
+
+// Attempts to synchronizes a null tree. This should not crash, and should
+// return a null tree.
+TEST(TreeSynchronizerTest, syncNullTree)
+{
+    DebugScopedSetImplThread impl;
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(0, nullptr, 0);
+
+    EXPECT_TRUE(!ccLayerTreeRoot.get());
+}
+
+// Constructs a very simple tree and synchronizes it without trying to reuse any preexisting layers.
+TEST(TreeSynchronizerTest, syncSimpleTreeFromEmpty)
+{
+    DebugScopedSetImplThread impl;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    RefPtr<LayerChromium> layerTreeRoot = LayerChromium::create();
+    layerTreeRoot->addChild(LayerChromium::create());
+    layerTreeRoot->addChild(LayerChromium::create());
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), nullptr, hostImpl.get());
+
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+}
+
+// Constructs a very simple tree and synchronizes it attempting to reuse some layers
+TEST(TreeSynchronizerTest, syncSimpleTreeReusingLayers)
+{
+    DebugScopedSetImplThread impl;
+    Vector<int> ccLayerDestructionList;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    RefPtr<LayerChromium> layerTreeRoot = MockLayerChromium::create(&ccLayerDestructionList);
+    layerTreeRoot->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+    layerTreeRoot->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), nullptr, hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Add a new layer to the LayerChromium side
+    layerTreeRoot->children()[0]->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+    // Remove one.
+    layerTreeRoot->children()[1]->removeFromParent();
+    int secondCCLayerId = ccLayerTreeRoot->children()[1]->id();
+
+    // Synchronize again. After the sync the trees should be equivalent and we should have created and destroyed one CCLayerImpl.
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    ASSERT_EQ(1u, ccLayerDestructionList.size());
+    EXPECT_EQ(secondCCLayerId, ccLayerDestructionList[0]);
+}
+
+// Constructs a very simple tree and checks that a stacking-order change is tracked properly.
+TEST(TreeSynchronizerTest, syncSimpleTreeAndTrackStackingOrderChange)
+{
+    DebugScopedSetImplThread impl;
+    Vector<int> ccLayerDestructionList;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    // Set up the tree and sync once. child2 needs to be synced here, too, even though we
+    // remove it to set up the intended scenario.
+    RefPtr<LayerChromium> layerTreeRoot = MockLayerChromium::create(&ccLayerDestructionList);
+    RefPtr<LayerChromium> child2 = MockLayerChromium::create(&ccLayerDestructionList);
+    layerTreeRoot->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+    layerTreeRoot->addChild(child2);
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), nullptr, hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+    ccLayerTreeRoot->resetAllChangeTrackingForSubtree();
+
+    // re-insert the layer and sync again.
+    child2->removeFromParent();
+    layerTreeRoot->addChild(child2);
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Check that the impl thread properly tracked the change.
+    EXPECT_FALSE(ccLayerTreeRoot->layerPropertyChanged());
+    EXPECT_FALSE(ccLayerTreeRoot->children()[0]->layerPropertyChanged());
+    EXPECT_TRUE(ccLayerTreeRoot->children()[1]->layerPropertyChanged());
+}
+
+TEST(TreeSynchronizerTest, syncSimpleTreeAndProperties)
+{
+    DebugScopedSetImplThread impl;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    RefPtr<LayerChromium> layerTreeRoot = LayerChromium::create();
+    layerTreeRoot->addChild(LayerChromium::create());
+    layerTreeRoot->addChild(LayerChromium::create());
+
+    // Pick some random properties to set. The values are not important, we're just testing that at least some properties are making it through.
+    FloatPoint rootPosition = FloatPoint(2.3f, 7.4f);
+    layerTreeRoot->setPosition(rootPosition);
+
+    float firstChildOpacity = 0.25f;
+    layerTreeRoot->children()[0]->setOpacity(firstChildOpacity);
+
+    IntSize secondChildBounds = IntSize(25, 53);
+    layerTreeRoot->children()[1]->setBounds(secondChildBounds);
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), nullptr, hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Check that the property values we set on the LayerChromium tree are reflected in the CCLayerImpl tree.
+    FloatPoint rootCCLayerPosition = ccLayerTreeRoot->position();
+    EXPECT_EQ(rootPosition.x(), rootCCLayerPosition.x());
+    EXPECT_EQ(rootPosition.y(), rootCCLayerPosition.y());
+
+    EXPECT_EQ(firstChildOpacity, ccLayerTreeRoot->children()[0]->opacity());
+
+    IntSize secondCCLayerChildBounds = ccLayerTreeRoot->children()[1]->bounds();
+    EXPECT_EQ(secondChildBounds.width(), secondCCLayerChildBounds.width());
+    EXPECT_EQ(secondChildBounds.height(), secondCCLayerChildBounds.height());
+}
+
+TEST(TreeSynchronizerTest, reuseCCLayersAfterStructuralChange)
+{
+    DebugScopedSetImplThread impl;
+    Vector<int> ccLayerDestructionList;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    // Set up a tree with this sort of structure:
+    // root --- A --- B ---+--- C
+    //                     |
+    //                     +--- D
+    RefPtr<LayerChromium> layerTreeRoot = MockLayerChromium::create(&ccLayerDestructionList);
+    layerTreeRoot->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+
+    RefPtr<LayerChromium> layerA = layerTreeRoot->children()[0].get();
+    layerA->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+
+    RefPtr<LayerChromium> layerB = layerA->children()[0].get();
+    layerB->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+
+    RefPtr<LayerChromium> layerC = layerB->children()[0].get();
+    layerB->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+    RefPtr<LayerChromium> layerD = layerB->children()[1].get();
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), nullptr, hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Now restructure the tree to look like this:
+    // root --- D ---+--- A
+    //               |
+    //               +--- C --- B
+    layerTreeRoot->removeAllChildren();
+    layerD->removeAllChildren();
+    layerTreeRoot->addChild(layerD);
+    layerA->removeAllChildren();
+    layerD->addChild(layerA);
+    layerC->removeAllChildren();
+    layerD->addChild(layerC);
+    layerB->removeAllChildren();
+    layerC->addChild(layerB);
+
+    // After another synchronize our trees should match and we should not have destroyed any CCLayerImpls
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    EXPECT_EQ(0u, ccLayerDestructionList.size());
+}
+
+// Constructs a very simple tree, synchronizes it, then synchronizes to a totally new tree. All layers from the old tree should be deleted.
+TEST(TreeSynchronizerTest, syncSimpleTreeThenDestroy)
+{
+    DebugScopedSetImplThread impl;
+    Vector<int> ccLayerDestructionList;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    RefPtr<LayerChromium> oldLayerTreeRoot = MockLayerChromium::create(&ccLayerDestructionList);
+    oldLayerTreeRoot->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+    oldLayerTreeRoot->addChild(MockLayerChromium::create(&ccLayerDestructionList));
+
+    int oldTreeRootLayerId = oldLayerTreeRoot->id();
+    int oldTreeFirstChildLayerId = oldLayerTreeRoot->children()[0]->id();
+    int oldTreeSecondChildLayerId = oldLayerTreeRoot->children()[1]->id();
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(oldLayerTreeRoot.get(), nullptr, hostImpl.get());
+    expectTreesAreIdentical(oldLayerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Remove all children on the LayerChromium side.
+    oldLayerTreeRoot->removeAllChildren();
+
+    // Synchronize again. After the sync all CCLayerImpls from the old tree should be deleted.
+    RefPtr<LayerChromium> newLayerTreeRoot = LayerChromium::create();
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(newLayerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+    expectTreesAreIdentical(newLayerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    ASSERT_EQ(3u, ccLayerDestructionList.size());
+    EXPECT_TRUE(ccLayerDestructionList.contains(oldTreeRootLayerId));
+    EXPECT_TRUE(ccLayerDestructionList.contains(oldTreeFirstChildLayerId));
+    EXPECT_TRUE(ccLayerDestructionList.contains(oldTreeSecondChildLayerId));
+}
+
+// Constructs+syncs a tree with mask, replica, and replica mask layers.
+TEST(TreeSynchronizerTest, syncMaskReplicaAndReplicaMaskLayers)
+{
+    DebugScopedSetImplThread impl;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    RefPtr<LayerChromium> layerTreeRoot = LayerChromium::create();
+    layerTreeRoot->addChild(LayerChromium::create());
+    layerTreeRoot->addChild(LayerChromium::create());
+    layerTreeRoot->addChild(LayerChromium::create());
+
+    // First child gets a mask layer.
+    RefPtr<LayerChromium> maskLayer = LayerChromium::create();
+    layerTreeRoot->children()[0]->setMaskLayer(maskLayer.get());
+
+    // Second child gets a replica layer.
+    RefPtr<LayerChromium> replicaLayer = LayerChromium::create();
+    layerTreeRoot->children()[1]->setReplicaLayer(replicaLayer.get());
+
+    // Third child gets a replica layer with a mask layer.
+    RefPtr<LayerChromium> replicaLayerWithMask = LayerChromium::create();
+    RefPtr<LayerChromium> replicaMaskLayer = LayerChromium::create();
+    replicaLayerWithMask->setMaskLayer(replicaMaskLayer.get());
+    layerTreeRoot->children()[2]->setReplicaLayer(replicaLayerWithMask.get());
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), nullptr, hostImpl.get());
+
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Remove the mask layer.
+    layerTreeRoot->children()[0]->setMaskLayer(0);
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Remove the replica layer.
+    layerTreeRoot->children()[1]->setReplicaLayer(0);
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+
+    // Remove the replica mask.
+    replicaLayerWithMask->setMaskLayer(0);
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+    expectTreesAreIdentical(layerTreeRoot.get(), ccLayerTreeRoot.get(), hostImpl.get());
+}
+
+TEST(TreeSynchronizerTest, synchronizeAnimations)
+{
+    DebugScopedSetImplThread impl;
+
+    CCLayerTreeSettings settings;
+    OwnPtr<CCLayerTreeHostImpl> hostImpl = CCLayerTreeHostImpl::create(settings, 0);
+
+    RefPtr<LayerChromium> layerTreeRoot = LayerChromium::create();
+
+    FakeLayerAnimationControllerClient dummy;
+    layerTreeRoot->setLayerAnimationController(FakeLayerAnimationController::create(&dummy));
+
+    EXPECT_FALSE(static_cast<FakeLayerAnimationController*>(layerTreeRoot->layerAnimationController())->synchronizedAnimations());
+
+    OwnPtr<CCLayerImpl> ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), nullptr, hostImpl.get());
+    ccLayerTreeRoot = TreeSynchronizer::synchronizeTrees(layerTreeRoot.get(), ccLayerTreeRoot.release(), hostImpl.get());
+
+    EXPECT_TRUE(static_cast<FakeLayerAnimationController*>(layerTreeRoot->layerAnimationController())->synchronizedAnimations());
+}
+
+} // namespace