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layer_tree_host_common_unittest.cc
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layer_tree_host_common_unittest.cc
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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 "cc/trees/layer_tree_host_common.h"
#include <stddef.h>
#include <algorithm>
#include <memory>
#include <set>
#include <vector>
#include "base/memory/ptr_util.h"
#include "cc/animation/animation_host.h"
#include "cc/animation/animation_id_provider.h"
#include "cc/animation/animation_player.h"
#include "cc/animation/keyframed_animation_curve.h"
#include "cc/animation/transform_operations.h"
#include "cc/base/math_util.h"
#include "cc/input/main_thread_scrolling_reason.h"
#include "cc/layers/content_layer_client.h"
#include "cc/layers/layer.h"
#include "cc/layers/layer_client.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/layer_iterator.h"
#include "cc/layers/render_surface_impl.h"
#include "cc/layers/texture_layer_impl.h"
#include "cc/output/copy_output_request.h"
#include "cc/output/copy_output_result.h"
#include "cc/test/animation_test_common.h"
#include "cc/test/fake_compositor_frame_sink.h"
#include "cc/test/fake_content_layer_client.h"
#include "cc/test/fake_impl_task_runner_provider.h"
#include "cc/test/fake_layer_tree_host.h"
#include "cc/test/fake_layer_tree_host_impl.h"
#include "cc/test/fake_picture_layer.h"
#include "cc/test/fake_picture_layer_impl.h"
#include "cc/test/geometry_test_utils.h"
#include "cc/test/layer_test_common.h"
#include "cc/test/test_task_graph_runner.h"
#include "cc/trees/clip_node.h"
#include "cc/trees/draw_property_utils.h"
#include "cc/trees/effect_node.h"
#include "cc/trees/layer_tree_impl.h"
#include "cc/trees/property_tree_builder.h"
#include "cc/trees/scroll_node.h"
#include "cc/trees/single_thread_proxy.h"
#include "cc/trees/task_runner_provider.h"
#include "cc/trees/transform_node.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkImageFilter.h"
#include "third_party/skia/include/effects/SkOffsetImageFilter.h"
#include "third_party/skia/include/effects/SkXfermodeImageFilter.h"
#include "ui/gfx/geometry/quad_f.h"
#include "ui/gfx/geometry/vector2d_conversions.h"
#include "ui/gfx/transform.h"
namespace cc {
namespace {
class VerifyTreeCalcsLayerTreeSettings : public LayerTreeSettings {
public:
VerifyTreeCalcsLayerTreeSettings() {
}
};
class LayerTreeHostCommonTestBase : public LayerTestCommon::LayerImplTest {
public:
LayerTreeHostCommonTestBase()
: LayerTestCommon::LayerImplTest(VerifyTreeCalcsLayerTreeSettings()) {}
explicit LayerTreeHostCommonTestBase(const LayerTreeSettings& settings)
: LayerTestCommon::LayerImplTest(settings) {}
static void SetScrollOffsetDelta(LayerImpl* layer_impl,
const gfx::Vector2dF& delta) {
if (layer_impl->layer_tree_impl()
->property_trees()
->scroll_tree.SetScrollOffsetDeltaForTesting(layer_impl->id(),
delta))
layer_impl->layer_tree_impl()->DidUpdateScrollOffset(layer_impl->id());
}
static float GetMaximumAnimationScale(LayerImpl* layer_impl) {
return layer_impl->layer_tree_impl()
->property_trees()
->GetAnimationScales(layer_impl->transform_tree_index(),
layer_impl->layer_tree_impl())
.maximum_animation_scale;
}
static float GetStartingAnimationScale(LayerImpl* layer_impl) {
return layer_impl->layer_tree_impl()
->property_trees()
->GetAnimationScales(layer_impl->transform_tree_index(),
layer_impl->layer_tree_impl())
.starting_animation_scale;
}
void ExecuteCalculateDrawProperties(Layer* root_layer,
float device_scale_factor,
float page_scale_factor,
Layer* page_scale_layer,
Layer* inner_viewport_scroll_layer,
Layer* outer_viewport_scroll_layer) {
PropertyTreeBuilder::PreCalculateMetaInformation(root_layer);
EXPECT_TRUE(page_scale_layer || (page_scale_factor == 1.f));
gfx::Size device_viewport_size =
gfx::Size(root_layer->bounds().width() * device_scale_factor,
root_layer->bounds().height() * device_scale_factor);
// We are probably not testing what is intended if the root_layer bounds are
// empty.
DCHECK(!root_layer->bounds().IsEmpty());
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root_layer, device_viewport_size);
inputs.device_scale_factor = device_scale_factor;
inputs.page_scale_factor = page_scale_factor;
inputs.page_scale_layer = page_scale_layer;
inputs.inner_viewport_scroll_layer = inner_viewport_scroll_layer;
inputs.outer_viewport_scroll_layer = outer_viewport_scroll_layer;
LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);
}
void ExecuteCalculateDrawProperties(LayerImpl* root_layer,
float device_scale_factor,
float page_scale_factor,
LayerImpl* page_scale_layer,
LayerImpl* inner_viewport_scroll_layer,
LayerImpl* outer_viewport_scroll_layer) {
if (device_scale_factor !=
root_layer->layer_tree_impl()->device_scale_factor())
root_layer->layer_tree_impl()->property_trees()->needs_rebuild = true;
root_layer->layer_tree_impl()->SetDeviceScaleFactor(device_scale_factor);
EXPECT_TRUE(page_scale_layer || (page_scale_factor == 1.f));
gfx::Size device_viewport_size =
gfx::Size(root_layer->bounds().width() * device_scale_factor,
root_layer->bounds().height() * device_scale_factor);
render_surface_layer_list_impl_.reset(new LayerImplList);
// We are probably not testing what is intended if the root_layer bounds are
// empty.
DCHECK(!root_layer->bounds().IsEmpty());
LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting inputs(
root_layer, device_viewport_size,
render_surface_layer_list_impl_.get());
inputs.device_scale_factor = device_scale_factor;
inputs.page_scale_factor = page_scale_factor;
inputs.page_scale_layer = page_scale_layer;
inputs.inner_viewport_scroll_layer = inner_viewport_scroll_layer;
inputs.outer_viewport_scroll_layer = outer_viewport_scroll_layer;
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);
}
template <class LayerType>
void ExecuteCalculateDrawProperties(LayerType* root_layer) {
LayerType* page_scale_application_layer = nullptr;
LayerType* inner_viewport_scroll_layer = nullptr;
LayerType* outer_viewport_scroll_layer = nullptr;
ExecuteCalculateDrawProperties(
root_layer, 1.f, 1.f, page_scale_application_layer,
inner_viewport_scroll_layer, outer_viewport_scroll_layer);
}
template <class LayerType>
void ExecuteCalculateDrawProperties(LayerType* root_layer,
float device_scale_factor) {
LayerType* page_scale_application_layer = nullptr;
LayerType* inner_viewport_scroll_layer = nullptr;
LayerType* outer_viewport_scroll_layer = nullptr;
ExecuteCalculateDrawProperties(
root_layer, device_scale_factor, 1.f, page_scale_application_layer,
inner_viewport_scroll_layer, outer_viewport_scroll_layer);
}
const LayerList* GetUpdateLayerList() { return &update_layer_list_; }
void ExecuteCalculateDrawPropertiesAndSaveUpdateLayerList(Layer* root_layer) {
DCHECK(root_layer->layer_tree_host());
PropertyTreeBuilder::PreCalculateMetaInformation(root_layer);
bool can_render_to_separate_surface = true;
const Layer* page_scale_layer =
root_layer->layer_tree_host()->page_scale_layer();
Layer* inner_viewport_scroll_layer =
root_layer->layer_tree_host()->inner_viewport_scroll_layer();
Layer* outer_viewport_scroll_layer =
root_layer->layer_tree_host()->outer_viewport_scroll_layer();
const Layer* overscroll_elasticity_layer =
root_layer->layer_tree_host()->overscroll_elasticity_layer();
gfx::Vector2dF elastic_overscroll =
root_layer->layer_tree_host()->elastic_overscroll();
float page_scale_factor = 1.f;
float device_scale_factor = 1.f;
gfx::Size device_viewport_size =
gfx::Size(root_layer->bounds().width() * device_scale_factor,
root_layer->bounds().height() * device_scale_factor);
PropertyTrees* property_trees =
root_layer->layer_tree_host()->property_trees();
update_layer_list_.clear();
PropertyTreeBuilder::BuildPropertyTrees(
root_layer, page_scale_layer, inner_viewport_scroll_layer,
outer_viewport_scroll_layer, overscroll_elasticity_layer,
elastic_overscroll, page_scale_factor, device_scale_factor,
gfx::Rect(device_viewport_size), gfx::Transform(), property_trees);
draw_property_utils::UpdatePropertyTrees(root_layer->layer_tree_host(),
property_trees,
can_render_to_separate_surface);
draw_property_utils::FindLayersThatNeedUpdates(
root_layer->layer_tree_host(), property_trees, &update_layer_list_);
}
void ExecuteCalculateDrawPropertiesAndSaveUpdateLayerList(
LayerImpl* root_layer) {
DCHECK(root_layer->layer_tree_impl());
PropertyTreeBuilder::PreCalculateMetaInformationForTesting(root_layer);
bool can_render_to_separate_surface = true;
const LayerImpl* page_scale_layer = nullptr;
LayerImpl* inner_viewport_scroll_layer =
root_layer->layer_tree_impl()->InnerViewportScrollLayer();
LayerImpl* outer_viewport_scroll_layer =
root_layer->layer_tree_impl()->OuterViewportScrollLayer();
const LayerImpl* overscroll_elasticity_layer =
root_layer->layer_tree_impl()->OverscrollElasticityLayer();
gfx::Vector2dF elastic_overscroll =
root_layer->layer_tree_impl()->elastic_overscroll()->Current(
root_layer->layer_tree_impl()->IsActiveTree());
float page_scale_factor = 1.f;
float device_scale_factor = 1.f;
gfx::Size device_viewport_size =
gfx::Size(root_layer->bounds().width() * device_scale_factor,
root_layer->bounds().height() * device_scale_factor);
update_layer_list_impl_.reset(new LayerImplList);
root_layer->layer_tree_impl()->BuildLayerListForTesting();
PropertyTrees* property_trees =
root_layer->layer_tree_impl()->property_trees();
PropertyTreeBuilder::BuildPropertyTrees(
root_layer, page_scale_layer, inner_viewport_scroll_layer,
outer_viewport_scroll_layer, overscroll_elasticity_layer,
elastic_overscroll, page_scale_factor, device_scale_factor,
gfx::Rect(device_viewport_size), gfx::Transform(), property_trees);
draw_property_utils::UpdatePropertyTreesAndRenderSurfaces(
root_layer, property_trees, can_render_to_separate_surface);
draw_property_utils::FindLayersThatNeedUpdates(
root_layer->layer_tree_impl(), property_trees,
update_layer_list_impl_.get());
draw_property_utils::ComputeDrawPropertiesOfVisibleLayers(
update_layer_list_impl(), property_trees);
}
void ExecuteCalculateDrawPropertiesWithoutSeparateSurfaces(
LayerImpl* root_layer) {
gfx::Size device_viewport_size =
gfx::Size(root_layer->bounds().width(), root_layer->bounds().height());
render_surface_layer_list_impl_.reset(new LayerImplList);
DCHECK(!root_layer->bounds().IsEmpty());
LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting inputs(
root_layer, device_viewport_size,
render_surface_layer_list_impl_.get());
inputs.can_adjust_raster_scales = true;
inputs.can_render_to_separate_surface = false;
LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);
}
bool UpdateLayerListImplContains(int id) const {
for (auto* layer : *update_layer_list_impl_) {
if (layer->id() == id)
return true;
}
return false;
}
bool UpdateLayerListContains(int id) const {
for (const auto& layer : update_layer_list_) {
if (layer->id() == id)
return true;
}
return false;
}
const LayerImplList* render_surface_layer_list_impl() const {
return render_surface_layer_list_impl_.get();
}
const LayerImplList* update_layer_list_impl() const {
return update_layer_list_impl_.get();
}
const LayerList& update_layer_list() const { return update_layer_list_; }
bool VerifyLayerInList(scoped_refptr<Layer> layer,
const LayerList* layer_list) {
return std::find(layer_list->begin(), layer_list->end(), layer) !=
layer_list->end();
}
private:
std::unique_ptr<std::vector<LayerImpl*>> render_surface_layer_list_impl_;
LayerList update_layer_list_;
std::unique_ptr<LayerImplList> update_layer_list_impl_;
};
class LayerTreeHostCommonTest : public LayerTreeHostCommonTestBase,
public testing::Test {};
class LayerWithForcedDrawsContent : public Layer {
public:
LayerWithForcedDrawsContent() {}
bool DrawsContent() const override { return true; }
private:
~LayerWithForcedDrawsContent() override {}
};
class LayerTreeSettingsScaleContent : public VerifyTreeCalcsLayerTreeSettings {
public:
LayerTreeSettingsScaleContent() {
layer_transforms_should_scale_layer_contents = true;
}
};
class LayerTreeHostCommonScalingTest : public LayerTreeHostCommonTestBase,
public testing::Test {
public:
LayerTreeHostCommonScalingTest()
: LayerTreeHostCommonTestBase(LayerTreeSettingsScaleContent()) {}
};
class LayerTreeHostCommonDrawRectsTest : public LayerTreeHostCommonTest {
public:
LayerTreeHostCommonDrawRectsTest() : LayerTreeHostCommonTest() {}
LayerImpl* TestVisibleRectAndDrawableContentRect(
const gfx::Rect& target_rect,
const gfx::Transform& layer_transform,
const gfx::Rect& layer_rect) {
LayerImpl* root = root_layer_for_testing();
LayerImpl* target = AddChild<LayerImpl>(root);
LayerImpl* drawing_layer = AddChild<LayerImpl>(target);
root->SetDrawsContent(true);
target->SetDrawsContent(true);
target->SetMasksToBounds(true);
drawing_layer->SetDrawsContent(true);
root->SetBounds(gfx::Size(500, 500));
root->test_properties()->force_render_surface = true;
target->SetPosition(gfx::PointF(target_rect.origin()));
target->SetBounds(target_rect.size());
target->test_properties()->force_render_surface = true;
drawing_layer->test_properties()->transform = layer_transform;
drawing_layer->SetPosition(gfx::PointF(layer_rect.origin()));
drawing_layer->SetBounds(layer_rect.size());
drawing_layer->test_properties()->should_flatten_transform = false;
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
return drawing_layer;
}
};
TEST_F(LayerTreeHostCommonTest, TransformsForNoOpLayer) {
// Sanity check: For layers positioned at zero, with zero size,
// and with identity transforms, then the draw transform,
// screen space transform, and the hierarchy passed on to children
// layers should also be identity transforms.
LayerImpl* parent = root_layer_for_testing();
LayerImpl* child = AddChild<LayerImpl>(parent);
LayerImpl* grand_child = AddChild<LayerImpl>(child);
parent->SetBounds(gfx::Size(100, 100));
ExecuteCalculateDrawProperties(parent);
EXPECT_TRANSFORMATION_MATRIX_EQ(gfx::Transform(), child->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(gfx::Transform(),
child->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(gfx::Transform(),
grand_child->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(gfx::Transform(),
grand_child->ScreenSpaceTransform());
}
TEST_F(LayerTreeHostCommonTest, EffectTreeTransformIdTest) {
// Tests that effect tree node gets a valid transform id when a layer
// has opacity but doesn't create a render surface.
LayerImpl* parent = root_layer_for_testing();
LayerImpl* child = AddChild<LayerImpl>(parent);
child->SetDrawsContent(true);
parent->SetBounds(gfx::Size(100, 100));
child->SetPosition(gfx::PointF(10, 10));
child->SetBounds(gfx::Size(100, 100));
child->test_properties()->opacity = 0.f;
ExecuteCalculateDrawProperties(parent);
EffectTree& effect_tree =
parent->layer_tree_impl()->property_trees()->effect_tree;
EffectNode* node = effect_tree.Node(child->effect_tree_index());
const int transform_tree_size = parent->layer_tree_impl()
->property_trees()
->transform_tree.next_available_id();
EXPECT_LT(node->transform_id, transform_tree_size);
}
TEST_F(LayerTreeHostCommonTest, TransformsForSingleLayer) {
LayerImpl* root = root_layer_for_testing();
LayerImpl* layer = AddChild<LayerImpl>(root);
TransformTree& transform_tree =
host_impl()->active_tree()->property_trees()->transform_tree;
EffectTree& effect_tree =
host_impl()->active_tree()->property_trees()->effect_tree;
root->SetBounds(gfx::Size(1, 2));
// Case 1: Setting the bounds of the layer should not affect either the draw
// transform or the screenspace transform.
layer->SetBounds(gfx::Size(10, 12));
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(),
draw_property_utils::DrawTransform(layer, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(),
draw_property_utils::ScreenSpaceTransform(layer, transform_tree));
// Case 2: The anchor point by itself (without a layer transform) should have
// no effect on the transforms.
layer->test_properties()->transform_origin = gfx::Point3F(2.5f, 3.0f, 0.f);
layer->SetBounds(gfx::Size(10, 12));
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(),
draw_property_utils::DrawTransform(layer, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(),
draw_property_utils::ScreenSpaceTransform(layer, transform_tree));
// Case 3: A change in actual position affects both the draw transform and
// screen space transform.
gfx::Transform position_transform;
position_transform.Translate(0.f, 1.2f);
layer->SetPosition(gfx::PointF(0.f, 1.2f));
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
position_transform,
draw_property_utils::DrawTransform(layer, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
position_transform,
draw_property_utils::ScreenSpaceTransform(layer, transform_tree));
// Case 4: In the correct sequence of transforms, the layer transform should
// pre-multiply the translation-to-center. This is easily tested by using a
// scale transform, because scale and translation are not commutative.
gfx::Transform layer_transform;
layer_transform.Scale3d(2.0, 2.0, 1.0);
layer->test_properties()->transform = layer_transform;
layer->test_properties()->transform_origin = gfx::Point3F();
layer->SetPosition(gfx::PointF());
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
layer_transform,
draw_property_utils::DrawTransform(layer, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
layer_transform,
draw_property_utils::ScreenSpaceTransform(layer, transform_tree));
// Case 5: The layer transform should occur with respect to the anchor point.
gfx::Transform translation_to_anchor;
translation_to_anchor.Translate(5.0, 0.0);
gfx::Transform expected_result =
translation_to_anchor * layer_transform * Inverse(translation_to_anchor);
layer->test_properties()->transform_origin = gfx::Point3F(5.f, 0.f, 0.f);
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
expected_result,
draw_property_utils::DrawTransform(layer, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
expected_result,
draw_property_utils::ScreenSpaceTransform(layer, transform_tree));
// Case 6: Verify that position pre-multiplies the layer transform. The
// current implementation of CalculateDrawProperties does this implicitly, but
// it is still worth testing to detect accidental regressions.
expected_result = position_transform * translation_to_anchor *
layer_transform * Inverse(translation_to_anchor);
layer->SetPosition(gfx::PointF(0.f, 1.2f));
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
expected_result,
draw_property_utils::DrawTransform(layer, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
expected_result,
draw_property_utils::ScreenSpaceTransform(layer, transform_tree));
}
TEST_F(LayerTreeHostCommonTest, TransformsAboutScrollOffset) {
const gfx::ScrollOffset kScrollOffset(50, 100);
const gfx::Vector2dF kScrollDelta(2.34f, 5.67f);
const gfx::Vector2d kMaxScrollOffset(200, 200);
const gfx::PointF kScrollLayerPosition(-kScrollOffset.x(),
-kScrollOffset.y());
float page_scale = 0.888f;
const float kDeviceScale = 1.666f;
FakeImplTaskRunnerProvider task_runner_provider;
TestTaskGraphRunner task_graph_runner;
FakeLayerTreeHostImpl host_impl(&task_runner_provider, &task_graph_runner);
std::unique_ptr<LayerImpl> sublayer_scoped_ptr(
LayerImpl::Create(host_impl.active_tree(), 1));
LayerImpl* sublayer = sublayer_scoped_ptr.get();
sublayer->SetDrawsContent(true);
sublayer->SetBounds(gfx::Size(500, 500));
std::unique_ptr<LayerImpl> scroll_layer_scoped_ptr(
LayerImpl::Create(host_impl.active_tree(), 2));
LayerImpl* scroll_layer = scroll_layer_scoped_ptr.get();
scroll_layer->SetBounds(gfx::Size(10, 20));
std::unique_ptr<LayerImpl> clip_layer_scoped_ptr(
LayerImpl::Create(host_impl.active_tree(), 4));
LayerImpl* clip_layer = clip_layer_scoped_ptr.get();
scroll_layer->SetScrollClipLayer(clip_layer->id());
clip_layer->SetBounds(
gfx::Size(scroll_layer->bounds().width() + kMaxScrollOffset.x(),
scroll_layer->bounds().height() + kMaxScrollOffset.y()));
scroll_layer->SetScrollClipLayer(clip_layer->id());
SetScrollOffsetDelta(scroll_layer, kScrollDelta);
gfx::Transform impl_transform;
scroll_layer->test_properties()->AddChild(std::move(sublayer_scoped_ptr));
LayerImpl* scroll_layer_raw_ptr = scroll_layer_scoped_ptr.get();
clip_layer->test_properties()->AddChild(std::move(scroll_layer_scoped_ptr));
scroll_layer_raw_ptr->layer_tree_impl()
->property_trees()
->scroll_tree.UpdateScrollOffsetBaseForTesting(scroll_layer_raw_ptr->id(),
kScrollOffset);
std::unique_ptr<LayerImpl> root(
LayerImpl::Create(host_impl.active_tree(), 3));
root->SetBounds(gfx::Size(3, 4));
root->test_properties()->AddChild(std::move(clip_layer_scoped_ptr));
LayerImpl* root_layer = root.get();
host_impl.active_tree()->SetRootLayerForTesting(std::move(root));
ExecuteCalculateDrawProperties(root_layer, kDeviceScale, page_scale,
scroll_layer->test_properties()->parent,
nullptr, nullptr);
gfx::Transform expected_transform;
gfx::PointF sub_layer_screen_position = kScrollLayerPosition - kScrollDelta;
expected_transform.Translate(MathUtil::Round(sub_layer_screen_position.x() *
page_scale * kDeviceScale),
MathUtil::Round(sub_layer_screen_position.y() *
page_scale * kDeviceScale));
expected_transform.Scale(page_scale * kDeviceScale,
page_scale * kDeviceScale);
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_transform,
sublayer->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_transform,
sublayer->ScreenSpaceTransform());
gfx::Transform arbitrary_translate;
const float kTranslateX = 10.6f;
const float kTranslateY = 20.6f;
arbitrary_translate.Translate(kTranslateX, kTranslateY);
scroll_layer->test_properties()->transform = arbitrary_translate;
root_layer->layer_tree_impl()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root_layer, kDeviceScale, page_scale,
scroll_layer->test_properties()->parent,
nullptr, nullptr);
expected_transform.MakeIdentity();
expected_transform.Translate(
MathUtil::Round(kTranslateX * page_scale * kDeviceScale +
sub_layer_screen_position.x() * page_scale *
kDeviceScale),
MathUtil::Round(kTranslateY * page_scale * kDeviceScale +
sub_layer_screen_position.y() * page_scale *
kDeviceScale));
expected_transform.Scale(page_scale * kDeviceScale,
page_scale * kDeviceScale);
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_transform,
sublayer->DrawTransform());
// Test that page scale is updated even when we don't rebuild property trees.
page_scale = 1.888f;
root_layer->layer_tree_impl()->SetViewportLayersFromIds(
Layer::INVALID_ID, scroll_layer->test_properties()->parent->id(),
Layer::INVALID_ID, Layer::INVALID_ID);
root_layer->layer_tree_impl()->SetPageScaleOnActiveTree(page_scale);
EXPECT_FALSE(root_layer->layer_tree_impl()->property_trees()->needs_rebuild);
ExecuteCalculateDrawProperties(root_layer, kDeviceScale, page_scale,
scroll_layer->test_properties()->parent,
nullptr, nullptr);
expected_transform.MakeIdentity();
expected_transform.Translate(
MathUtil::Round(kTranslateX * page_scale * kDeviceScale +
sub_layer_screen_position.x() * page_scale *
kDeviceScale),
MathUtil::Round(kTranslateY * page_scale * kDeviceScale +
sub_layer_screen_position.y() * page_scale *
kDeviceScale));
expected_transform.Scale(page_scale * kDeviceScale,
page_scale * kDeviceScale);
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_transform,
sublayer->DrawTransform());
}
TEST_F(LayerTreeHostCommonTest, TransformsForSimpleHierarchy) {
LayerImpl* root = root_layer_for_testing();
LayerImpl* parent = AddChild<LayerImpl>(root);
LayerImpl* child = AddChild<LayerImpl>(parent);
LayerImpl* grand_child = AddChild<LayerImpl>(child);
// One-time setup of root layer
root->SetBounds(gfx::Size(1, 2));
TransformTree& transform_tree =
host_impl()->active_tree()->property_trees()->transform_tree;
EffectTree& effect_tree =
host_impl()->active_tree()->property_trees()->effect_tree;
// Case 1: parent's anchor point should not affect child or grand_child.
parent->test_properties()->transform_origin = gfx::Point3F(2.5f, 3.0f, 0.f);
parent->SetBounds(gfx::Size(10, 12));
child->SetBounds(gfx::Size(16, 18));
grand_child->SetBounds(gfx::Size(76, 78));
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(),
draw_property_utils::DrawTransform(child, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(),
draw_property_utils::ScreenSpaceTransform(child, transform_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(), draw_property_utils::DrawTransform(
grand_child, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
gfx::Transform(),
draw_property_utils::ScreenSpaceTransform(grand_child, transform_tree));
// Case 2: parent's position affects child and grand_child.
gfx::Transform parent_position_transform;
parent_position_transform.Translate(0.f, 1.2f);
parent->SetPosition(gfx::PointF(0.f, 1.2f));
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_position_transform,
draw_property_utils::DrawTransform(child, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_position_transform,
draw_property_utils::ScreenSpaceTransform(child, transform_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_position_transform, draw_property_utils::DrawTransform(
grand_child, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_position_transform,
draw_property_utils::ScreenSpaceTransform(grand_child, transform_tree));
// Case 3: parent's local transform affects child and grandchild
gfx::Transform parent_layer_transform;
parent_layer_transform.Scale3d(2.0, 2.0, 1.0);
gfx::Transform parent_translation_to_anchor;
parent_translation_to_anchor.Translate(2.5, 3.0);
gfx::Transform parent_composite_transform =
parent_translation_to_anchor * parent_layer_transform *
Inverse(parent_translation_to_anchor);
parent->test_properties()->transform = parent_layer_transform;
parent->SetPosition(gfx::PointF());
host_impl()->active_tree()->property_trees()->needs_rebuild = true;
ExecuteCalculateDrawProperties(root);
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_composite_transform,
draw_property_utils::DrawTransform(child, transform_tree, effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_composite_transform,
draw_property_utils::ScreenSpaceTransform(child, transform_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_composite_transform,
draw_property_utils::DrawTransform(grand_child, transform_tree,
effect_tree));
EXPECT_TRANSFORMATION_MATRIX_EQ(
parent_composite_transform,
draw_property_utils::ScreenSpaceTransform(grand_child, transform_tree));
}
TEST_F(LayerTreeHostCommonTest, TransformsForSingleRenderSurface) {
LayerImpl* root = root_layer_for_testing();
LayerImpl* parent = AddChildToRoot<LayerImpl>();
LayerImpl* child = AddChild<LayerImpl>(parent);
LayerImpl* grand_child = AddChild<LayerImpl>(child);
gfx::Transform parent_layer_transform;
parent_layer_transform.Scale3d(1.f, 0.9f, 1.f);
gfx::Transform parent_translation_to_anchor;
parent_translation_to_anchor.Translate(25.0, 30.0);
gfx::Transform parent_composite_transform =
parent_translation_to_anchor * parent_layer_transform *
Inverse(parent_translation_to_anchor);
gfx::Vector2dF parent_composite_scale =
MathUtil::ComputeTransform2dScaleComponents(parent_composite_transform,
1.f);
gfx::Transform surface_sublayer_transform;
surface_sublayer_transform.Scale(parent_composite_scale.x(),
parent_composite_scale.y());
gfx::Transform surface_sublayer_composite_transform =
parent_composite_transform * Inverse(surface_sublayer_transform);
root->SetBounds(gfx::Size(1, 2));
parent->test_properties()->transform = parent_layer_transform;
parent->test_properties()->transform_origin = gfx::Point3F(2.5f, 30.f, 0.f);
parent->SetBounds(gfx::Size(100, 120));
child->SetBounds(gfx::Size(16, 18));
child->test_properties()->force_render_surface = true;
grand_child->SetBounds(gfx::Size(8, 10));
grand_child->SetDrawsContent(true);
ExecuteCalculateDrawProperties(root);
// Render surface should have been created now.
ASSERT_TRUE(child->GetRenderSurface());
ASSERT_EQ(child->GetRenderSurface(), child->render_target());
// The child layer's draw transform should refer to its new render surface.
// The screen-space transform, however, should still refer to the root.
EXPECT_TRANSFORMATION_MATRIX_EQ(surface_sublayer_transform,
child->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_composite_transform,
child->ScreenSpaceTransform());
// Because the grand_child is the only drawable content, the child's render
// surface will tighten its bounds to the grand_child. The scale at which the
// surface's subtree is drawn must be removed from the composite transform.
EXPECT_TRANSFORMATION_MATRIX_EQ(surface_sublayer_composite_transform,
child->render_target()->draw_transform());
// The screen space is the same as the target since the child surface draws
// into the root.
EXPECT_TRANSFORMATION_MATRIX_EQ(
surface_sublayer_composite_transform,
child->render_target()->screen_space_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformsWhenCannotRenderToSeparateSurface) {
LayerImpl* root = root_layer_for_testing();
LayerImpl* parent = AddChildToRoot<LayerImpl>();
LayerImpl* child = AddChild<LayerImpl>(parent);
LayerImpl* grand_child = AddChild<LayerImpl>(child);
gfx::Transform parent_transform;
parent_transform.Translate(10.0, 10.0);
gfx::Transform child_transform;
child_transform.Rotate(45.0);
root->SetBounds(gfx::Size(100, 100));
parent->test_properties()->transform = parent_transform;
parent->SetBounds(gfx::Size(10, 10));
child->test_properties()->transform = child_transform;
child->SetBounds(gfx::Size(10, 10));
child->test_properties()->force_render_surface = true;
grand_child->SetPosition(gfx::PointF(2.f, 2.f));
grand_child->SetBounds(gfx::Size(20, 20));
grand_child->SetDrawsContent(true);
gfx::Transform expected_grand_child_screen_space_transform;
expected_grand_child_screen_space_transform.Translate(10.0, 10.0);
expected_grand_child_screen_space_transform.Rotate(45.0);
expected_grand_child_screen_space_transform.Translate(2.0, 2.0);
// First compute draw properties with separate surfaces enabled.
ExecuteCalculateDrawProperties(root);
// The grand child's draw transform should be its offset wrt the child.
gfx::Transform expected_grand_child_draw_transform;
expected_grand_child_draw_transform.Translate(2.0, 2.0);
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_draw_transform,
grand_child->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_screen_space_transform,
grand_child->ScreenSpaceTransform());
ExecuteCalculateDrawPropertiesWithoutSeparateSurfaces(root);
// With separate surfaces disabled, the grand child's draw transform should be
// the same as its screen space transform.
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_screen_space_transform,
grand_child->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_screen_space_transform,
grand_child->ScreenSpaceTransform());
}
TEST_F(LayerTreeHostCommonTest, TransformsForRenderSurfaceHierarchy) {
// This test creates a more complex tree and verifies it all at once. This
// covers the following cases:
// - layers that are described w.r.t. a render surface: should have draw
// transforms described w.r.t. that surface
// - A render surface described w.r.t. an ancestor render surface: should
// have a draw transform described w.r.t. that ancestor surface
// - Sanity check on recursion: verify transforms of layers described w.r.t.
// a render surface that is described w.r.t. an ancestor render surface.
// - verifying that each layer has a reference to the correct render surface
// and render target values.
LayerImpl* root = root_layer_for_testing();
LayerImpl* parent = AddChildToRoot<LayerImpl>();
parent->SetDrawsContent(true);
LayerImpl* render_surface1 = AddChild<LayerImpl>(parent);
render_surface1->SetDrawsContent(true);
LayerImpl* render_surface2 = AddChild<LayerImpl>(render_surface1);
render_surface2->SetDrawsContent(true);
LayerImpl* child_of_root = AddChild<LayerImpl>(parent);
child_of_root->SetDrawsContent(true);
LayerImpl* child_of_rs1 = AddChild<LayerImpl>(render_surface1);
child_of_rs1->SetDrawsContent(true);
LayerImpl* child_of_rs2 = AddChild<LayerImpl>(render_surface2);
child_of_rs2->SetDrawsContent(true);
LayerImpl* grand_child_of_root = AddChild<LayerImpl>(child_of_root);
grand_child_of_root->SetDrawsContent(true);
LayerImpl* grand_child_of_rs1 = AddChild<LayerImpl>(child_of_rs1);
grand_child_of_rs1->SetDrawsContent(true);
LayerImpl* grand_child_of_rs2 = AddChild<LayerImpl>(child_of_rs2);
grand_child_of_rs2->SetDrawsContent(true);
// In combination with descendant draws content, opacity != 1 forces the layer
// to have a new render surface.
render_surface1->test_properties()->opacity = 0.5f;
render_surface2->test_properties()->opacity = 0.33f;
// All layers in the tree are initialized with an anchor at .25 and a size of
// (10,10). Matrix "A" is the composite layer transform used in all layers.
gfx::Transform translation_to_anchor;
translation_to_anchor.Translate(2.5, 0.0);
gfx::Transform layer_transform;
layer_transform.Translate(1.0, 1.0);
gfx::Transform A =
translation_to_anchor * layer_transform * Inverse(translation_to_anchor);
gfx::Vector2dF surface1_parent_transform_scale =
MathUtil::ComputeTransform2dScaleComponents(A, 1.f);
gfx::Transform surface1_sublayer_transform;
surface1_sublayer_transform.Scale(surface1_parent_transform_scale.x(),
surface1_parent_transform_scale.y());
// SS1 = transform given to the subtree of render_surface1
gfx::Transform SS1 = surface1_sublayer_transform;
// S1 = transform to move from render_surface1 pixels to the layer space of
// the owning layer
gfx::Transform S1 = Inverse(surface1_sublayer_transform);
gfx::Vector2dF surface2_parent_transform_scale =
MathUtil::ComputeTransform2dScaleComponents(SS1 * A, 1.f);
gfx::Transform surface2_sublayer_transform;
surface2_sublayer_transform.Scale(surface2_parent_transform_scale.x(),
surface2_parent_transform_scale.y());
// SS2 = transform given to the subtree of render_surface2
gfx::Transform SS2 = surface2_sublayer_transform;
// S2 = transform to move from render_surface2 pixels to the layer space of
// the owning layer
gfx::Transform S2 = Inverse(surface2_sublayer_transform);
root->SetBounds(gfx::Size(1, 2));
parent->test_properties()->transform_origin = gfx::Point3F(2.5f, 0.f, 0.f);
parent->test_properties()->transform = layer_transform;
parent->SetBounds(gfx::Size(10, 10));
render_surface1->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
render_surface1->test_properties()->transform = layer_transform;
render_surface1->SetBounds(gfx::Size(10, 10));
render_surface1->test_properties()->force_render_surface = true;
render_surface2->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
render_surface2->test_properties()->transform = layer_transform;
render_surface2->SetBounds(gfx::Size(10, 10));
render_surface2->test_properties()->force_render_surface = true;
child_of_root->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
child_of_root->test_properties()->transform = layer_transform;
child_of_root->SetBounds(gfx::Size(10, 10));
child_of_rs1->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
child_of_rs1->test_properties()->transform = layer_transform;
child_of_rs1->SetBounds(gfx::Size(10, 10));
child_of_rs2->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
child_of_rs2->test_properties()->transform = layer_transform;
child_of_rs2->SetBounds(gfx::Size(10, 10));
grand_child_of_root->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
grand_child_of_root->test_properties()->transform = layer_transform;
grand_child_of_root->SetBounds(gfx::Size(10, 10));
grand_child_of_rs1->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
grand_child_of_rs1->test_properties()->transform = layer_transform;
grand_child_of_rs1->SetBounds(gfx::Size(10, 10));
grand_child_of_rs2->test_properties()->transform_origin =
gfx::Point3F(2.5f, 0.f, 0.f);
grand_child_of_rs2->test_properties()->transform = layer_transform;
grand_child_of_rs2->SetBounds(gfx::Size(10, 10));
ExecuteCalculateDrawProperties(root);
// Only layers that are associated with render surfaces should have an actual
// RenderSurface() value.
ASSERT_TRUE(root->GetRenderSurface());
ASSERT_FALSE(child_of_root->GetRenderSurface());
ASSERT_FALSE(grand_child_of_root->GetRenderSurface());
ASSERT_TRUE(render_surface1->GetRenderSurface());
ASSERT_FALSE(child_of_rs1->GetRenderSurface());
ASSERT_FALSE(grand_child_of_rs1->GetRenderSurface());
ASSERT_TRUE(render_surface2->GetRenderSurface());
ASSERT_FALSE(child_of_rs2->GetRenderSurface());
ASSERT_FALSE(grand_child_of_rs2->GetRenderSurface());
// Verify all render target accessors
EXPECT_EQ(root->GetRenderSurface(), parent->render_target());
EXPECT_EQ(root->GetRenderSurface(), child_of_root->render_target());
EXPECT_EQ(root->GetRenderSurface(), grand_child_of_root->render_target());
EXPECT_EQ(render_surface1->GetRenderSurface(),
render_surface1->render_target());
EXPECT_EQ(render_surface1->GetRenderSurface(), child_of_rs1->render_target());
EXPECT_EQ(render_surface1->GetRenderSurface(),
grand_child_of_rs1->render_target());
EXPECT_EQ(render_surface2->GetRenderSurface(),
render_surface2->render_target());
EXPECT_EQ(render_surface2->GetRenderSurface(), child_of_rs2->render_target());
EXPECT_EQ(render_surface2->GetRenderSurface(),
grand_child_of_rs2->render_target());
// Verify layer draw transforms note that draw transforms are described with
// respect to the nearest ancestor render surface but screen space transforms
// are described with respect to the root.
EXPECT_TRANSFORMATION_MATRIX_EQ(A, parent->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A, child_of_root->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A,
grand_child_of_root->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS1, render_surface1->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS1 * A, child_of_rs1->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS1 * A * A,
grand_child_of_rs1->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS2, render_surface2->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS2 * A, child_of_rs2->DrawTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS2 * A * A,
grand_child_of_rs2->DrawTransform());
// Verify layer screen-space transforms
//
EXPECT_TRANSFORMATION_MATRIX_EQ(A, parent->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A, child_of_root->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A,
grand_child_of_root->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A,
render_surface1->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A,
child_of_rs1->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A * A,
grand_child_of_rs1->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A,
render_surface2->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A * A,
child_of_rs2->ScreenSpaceTransform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A * A * A,
grand_child_of_rs2->ScreenSpaceTransform());
// Verify render surface transforms.
//
// Draw transform of render surface 1 is described with respect to root.
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * A * S1, render_surface1->GetRenderSurface()->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * A * S1,