compositor-worker: Remove code from cc_blink

third_party/WebKit/Source/platform/graphics/CompositorMutableStateTest.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/CompositorMutableState.h"
+
+#include "base/message_loop/message_loop.h"
+#include "cc/test/fake_impl_task_runner_provider.h"
+#include "cc/test/fake_layer_tree_host_impl.h"
+#include "cc/test/fake_output_surface.h"
+#include "cc/test/test_shared_bitmap_manager.h"
+#include "cc/test/test_task_graph_runner.h"
+#include "cc/trees/layer_tree_host_impl.h"
+#include "cc/trees/layer_tree_impl.h"
+#include "platform/graphics/CompositorMutableProperties.h"
+#include "platform/graphics/CompositorMutableStateProvider.h"
+#include "platform/graphics/CompositorMutation.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/OwnPtr.h"
+
+namespace blink {
+
+using cc::FakeImplTaskRunnerProvider;
+using cc::FakeLayerTreeHostImpl;
+using cc::FakeOutputSurface;
+using cc::LayerImpl;
+using cc::LayerTreeSettings;
+using cc::OutputSurface;
+using cc::TestTaskGraphRunner;
+using cc::TestSharedBitmapManager;
+
+class CompositorMutableStateTest : public testing::Test {
+public:
+    CompositorMutableStateTest()
+        : m_outputSurface(FakeOutputSurface::Create3d())
+    {
+        LayerTreeSettings settings;
+        settings.layer_transforms_should_scale_layer_contents = true;
+        settings.verify_property_trees = true;
+        m_hostImpl.reset(new FakeLayerTreeHostImpl(settings, &m_taskRunnerProvider, &m_sharedBitmapManager, &m_taskGraphRunner));
+        m_hostImpl->SetVisible(true);
+        EXPECT_TRUE(m_hostImpl->InitializeRenderer(m_outputSurface.get()));
+    }
+
+    void SetLayerPropertiesForTesting(LayerImpl* layer)
+    {
+        layer->SetTransform(gfx::Transform());
+        layer->SetTransformOrigin(gfx::Point3F());
+        layer->SetPosition(gfx::PointF());
+        layer->SetBounds(gfx::Size(100, 100));
+        layer->SetShouldFlattenTransform(true);
+        layer->Set3dSortingContextId(0);
+        layer->SetForceRenderSurface(true);
+        layer->SetDrawsContent(true);
+    }
+
+    FakeLayerTreeHostImpl& hostImpl() { return *m_hostImpl; }
+
+    LayerImpl* rootLayer() { return m_hostImpl->active_tree()->root_layer(); }
+
+private:
+    base::MessageLoop m_messageLoop;

[jbroman, 2016/01/18 19:07:22]

At least a comment explaining why this message loop (which has no obvious uses)
needs to exist would be nice. Or perhaps if this is common, it could be bundled
with other test dependencies of the compositor.

[Ian Vollick, 2016/01/18 21:25:04]

Done.

+    TestSharedBitmapManager m_sharedBitmapManager;
+    TestTaskGraphRunner m_taskGraphRunner;
+    FakeImplTaskRunnerProvider m_taskRunnerProvider;
+    scoped_ptr<OutputSurface> m_outputSurface;
+    scoped_ptr<FakeLayerTreeHostImpl> m_hostImpl;
+};
+
+TEST_F(CompositorMutableStateTest, NoMutableState)
+{
+    // In this test, there are no layers with either an element id or mutable
+    // properties. We should not be able to get any mutable state.
+    scoped_ptr<LayerImpl> root = LayerImpl::Create(hostImpl().active_tree(), 42);
+    SetLayerPropertiesForTesting(root.get());
+
+    hostImpl().SetViewportSize(root->bounds());
+    hostImpl().active_tree()->SetRootLayer(std::move(root));
+    hostImpl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
+
+    CompositorMutations mutations;
+    CompositorMutableStateProvider provider(hostImpl().active_tree(), &mutations);
+    OwnPtr<CompositorMutableState> state(provider.getMutableStateFor(42));
+    EXPECT_FALSE(state);
+}
+
+TEST_F(CompositorMutableStateTest, MutableStateNoMutableProperties)
+{
+    // In this test, there is a layer with an element id, but no mutable
+    // properties. This should behave just as if we'd had no element id.
+    scoped_ptr<LayerImpl> root = LayerImpl::Create(hostImpl().active_tree(), 42);
+    SetLayerPropertiesForTesting(root.get());
+    root->SetElementId(42);
+
+    hostImpl().SetViewportSize(root->bounds());
+    hostImpl().active_tree()->SetRootLayer(std::move(root));
+    hostImpl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
+
+    CompositorMutations mutations;
+    CompositorMutableStateProvider provider(hostImpl().active_tree(), &mutations);
+    OwnPtr<CompositorMutableState> state(provider.getMutableStateFor(42));
+    EXPECT_FALSE(state);
+}
+
+TEST_F(CompositorMutableStateTest, MutableStateMutableProperties)
+{
+    // In this test, there is a layer with an element id and mutable properties.
+    // In this case, we should get a valid mutable state for this element id that
+    // has a real effect on the corresponding layer.
+    scoped_ptr<LayerImpl> root = LayerImpl::Create(hostImpl().active_tree(), 42);
+    SetLayerPropertiesForTesting(root.get());
+    root->SetElementId(42);
+    root->SetMutableProperties(CompositorMutablePropertyOpacity | CompositorMutablePropertyTransform | CompositorMutablePropertyScrollLeft | CompositorMutablePropertyScrollTop);
+
+    hostImpl().SetViewportSize(root->bounds());
+    hostImpl().active_tree()->SetRootLayer(std::move(root));
+    hostImpl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
+
+    CompositorMutations mutations;
+    CompositorMutableStateProvider provider(hostImpl().active_tree(), &mutations);
+
+    OwnPtr<CompositorMutableState> state(provider.getMutableStateFor(42));
+    EXPECT_TRUE(state.get());
+
+    EXPECT_EQ(1.0, rootLayer()->opacity());
+    EXPECT_EQ(gfx::Transform().ToString(), rootLayer()->transform().ToString());
+    EXPECT_EQ(0.0, rootLayer()->CurrentScrollOffset().x());
+    EXPECT_EQ(0.0, rootLayer()->CurrentScrollOffset().y());
+
+    gfx::Transform zero(0, 0, 0, 0, 0, 0);
+    state->setOpacity(0.5);
+    state->setTransform(zero.matrix());
+    state->setScrollLeft(1.0);
+    state->setScrollTop(1.0);
+
+    EXPECT_EQ(0.5, rootLayer()->opacity());
+    EXPECT_EQ(zero.ToString(), rootLayer()->transform().ToString());
+    EXPECT_EQ(1.0, rootLayer()->CurrentScrollOffset().x());
+    EXPECT_EQ(1.0, rootLayer()->CurrentScrollOffset().y());
+
+    // The corresponding mutation should reflect the changed values.
+    EXPECT_EQ(1ul, mutations.map.size());
+
+    const CompositorMutation& mutation = mutations.map[42];
+    EXPECT_TRUE(mutation.isOpacityMutated());
+    EXPECT_TRUE(mutation.isTransformMutated());
+    EXPECT_TRUE(mutation.isScrollLeftMutated());
+    EXPECT_TRUE(mutation.isScrollTopMutated());
+
+    EXPECT_EQ(0.5, mutation.opacity());
+    EXPECT_EQ(zero.ToString(), gfx::Transform(mutation.transform()).ToString());
+    EXPECT_EQ(1.0, mutation.scrollLeft());
+    EXPECT_EQ(1.0, mutation.scrollTop());
+}
+
+} // namespace blink