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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 <set>
#include "cc/animation/layer_animation_controller.h"
#include "cc/base/math_util.h"
#include "cc/layers/content_layer.h"
#include "cc/layers/content_layer_client.h"
#include "cc/layers/heads_up_display_layer_impl.h"
#include "cc/layers/layer.h"
#include "cc/layers/layer_client.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/render_surface.h"
#include "cc/layers/render_surface_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_impl_proxy.h"
#include "cc/test/fake_layer_tree_host.h"
#include "cc/test/fake_layer_tree_host_impl.h"
#include "cc/test/geometry_test_utils.h"
#include "cc/trees/layer_tree_impl.h"
#include "cc/trees/proxy.h"
#include "cc/trees/single_thread_proxy.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/quad_f.h"
#include "ui/gfx/size_conversions.h"
#include "ui/gfx/transform.h"
namespace cc {
namespace {
class LayerTreeHostCommonTestBase {
protected:
template <typename LayerType>
void SetLayerPropertiesForTestingInternal(
LayerType* layer,
const gfx::Transform& transform,
const gfx::PointF& anchor,
const gfx::PointF& position,
const gfx::Size& bounds,
bool flatten_transform,
bool is_3d_sorted) {
layer->SetTransform(transform);
layer->SetAnchorPoint(anchor);
layer->SetPosition(position);
layer->SetBounds(bounds);
layer->SetShouldFlattenTransform(flatten_transform);
layer->SetIs3dSorted(is_3d_sorted);
}
void SetLayerPropertiesForTesting(Layer* layer,
const gfx::Transform& transform,
const gfx::PointF& anchor,
const gfx::PointF& position,
const gfx::Size& bounds,
bool flatten_transform,
bool is_3d_sorted) {
SetLayerPropertiesForTestingInternal<Layer>(layer,
transform,
anchor,
position,
bounds,
flatten_transform,
is_3d_sorted);
}
void SetLayerPropertiesForTesting(LayerImpl* layer,
const gfx::Transform& transform,
const gfx::PointF& anchor,
const gfx::PointF& position,
const gfx::Size& bounds,
bool flatten_transform,
bool is_3d_sorted) {
SetLayerPropertiesForTestingInternal<LayerImpl>(layer,
transform,
anchor,
position,
bounds,
flatten_transform,
is_3d_sorted);
layer->SetContentBounds(bounds);
}
void ExecuteCalculateDrawProperties(Layer* root_layer,
float device_scale_factor,
float page_scale_factor,
Layer* page_scale_application_layer,
bool can_use_lcd_text) {
EXPECT_TRUE(page_scale_application_layer || (page_scale_factor == 1.f));
gfx::Transform identity_matrix;
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_.reset(new RenderSurfaceLayerList);
// 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, render_surface_layer_list_.get());
inputs.device_scale_factor = device_scale_factor;
inputs.page_scale_factor = page_scale_factor;
inputs.page_scale_application_layer = page_scale_application_layer;
inputs.can_use_lcd_text = can_use_lcd_text;
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
}
void ExecuteCalculateDrawProperties(LayerImpl* root_layer,
float device_scale_factor,
float page_scale_factor,
LayerImpl* page_scale_application_layer,
bool can_use_lcd_text) {
gfx::Transform identity_matrix;
LayerImplList dummy_render_surface_layer_list;
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::CalcDrawPropsImplInputsForTesting inputs(
root_layer, device_viewport_size, &dummy_render_surface_layer_list);
inputs.device_scale_factor = device_scale_factor;
inputs.page_scale_factor = page_scale_factor;
inputs.page_scale_application_layer = page_scale_application_layer;
inputs.can_use_lcd_text = can_use_lcd_text;
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
}
template <class LayerType>
void ExecuteCalculateDrawProperties(LayerType* root_layer) {
LayerType* page_scale_application_layer = NULL;
ExecuteCalculateDrawProperties(
root_layer, 1.f, 1.f, page_scale_application_layer, false);
}
template <class LayerType>
void ExecuteCalculateDrawProperties(LayerType* root_layer,
float device_scale_factor) {
LayerType* page_scale_application_layer = NULL;
ExecuteCalculateDrawProperties(root_layer,
device_scale_factor,
1.f,
page_scale_application_layer,
false);
}
template <class LayerType>
void ExecuteCalculateDrawProperties(LayerType* root_layer,
float device_scale_factor,
float page_scale_factor,
LayerType* page_scale_application_layer) {
ExecuteCalculateDrawProperties(root_layer,
device_scale_factor,
page_scale_factor,
page_scale_application_layer,
false);
}
RenderSurfaceLayerList* render_surface_layer_list() const {
return render_surface_layer_list_.get();
}
private:
scoped_ptr<RenderSurfaceLayerList> render_surface_layer_list_;
};
class LayerTreeHostCommonTest : public LayerTreeHostCommonTestBase,
public testing::Test {
};
class LayerWithForcedDrawsContent : public Layer {
public:
LayerWithForcedDrawsContent() : Layer() {}
virtual bool DrawsContent() const OVERRIDE;
private:
virtual ~LayerWithForcedDrawsContent() {}
};
bool LayerWithForcedDrawsContent::DrawsContent() const { return true; }
class MockContentLayerClient : public ContentLayerClient {
public:
MockContentLayerClient() {}
virtual ~MockContentLayerClient() {}
virtual void PaintContents(SkCanvas* canvas,
const gfx::Rect& clip,
gfx::RectF* opaque) OVERRIDE {}
virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
};
scoped_refptr<ContentLayer> CreateDrawableContentLayer(
ContentLayerClient* delegate) {
scoped_refptr<ContentLayer> to_return = ContentLayer::Create(delegate);
to_return->SetIsDrawable(true);
return to_return;
}
#define EXPECT_CONTENTS_SCALE_EQ(expected, layer) \
do { \
EXPECT_FLOAT_EQ(expected, layer->contents_scale_x()); \
EXPECT_FLOAT_EQ(expected, layer->contents_scale_y()); \
} while (false)
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.
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<Layer> grand_child = Layer::Create();
parent->AddChild(child);
child->AddChild(grand_child);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(),
true,
false);
ExecuteCalculateDrawProperties(parent.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
child->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
grand_child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
grand_child->screen_space_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformsForSingleLayer) {
gfx::Transform identity_matrix;
scoped_refptr<Layer> layer = Layer::Create();
scoped_refptr<Layer> root = Layer::Create();
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(1, 2),
true,
false);
root->AddChild(layer);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
// Case 2: Setting the bounds of the layer should not affect either the draw
// transform or the screenspace transform.
gfx::Transform translation_to_center;
translation_to_center.Translate(5.0, 6.0);
SetLayerPropertiesForTesting(layer.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, layer->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
layer->screen_space_transform());
// Case 3: The anchor point by itself (without a layer transform) should have
// no effect on the transforms.
SetLayerPropertiesForTesting(layer.get(),
identity_matrix,
gfx::PointF(0.25f, 0.25f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, layer->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
layer->screen_space_transform());
// Case 4: 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);
SetLayerPropertiesForTesting(layer.get(),
identity_matrix,
gfx::PointF(0.25f, 0.25f),
gfx::PointF(0.f, 1.2f),
gfx::Size(10, 12),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(position_transform, layer->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(position_transform,
layer->screen_space_transform());
// Case 5: 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);
SetLayerPropertiesForTesting(layer.get(),
layer_transform,
gfx::PointF(),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(layer_transform, layer->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(layer_transform,
layer->screen_space_transform());
// Case 6: 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);
SetLayerPropertiesForTesting(layer.get(),
layer_transform,
gfx::PointF(0.5f, 0.f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_result, layer->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_result,
layer->screen_space_transform());
// Case 7: 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);
SetLayerPropertiesForTesting(layer.get(),
layer_transform,
gfx::PointF(0.5f, 0.f),
gfx::PointF(0.f, 1.2f),
gfx::Size(10, 12),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_result, layer->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_result,
layer->screen_space_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformsAboutScrollOffset) {
const gfx::Vector2d 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());
const float kPageScale = 0.888f;
const float kDeviceScale = 1.666f;
FakeImplProxy proxy;
FakeLayerTreeHostImpl host_impl(&proxy);
gfx::Transform identity_matrix;
scoped_ptr<LayerImpl> sublayer_scoped_ptr(
LayerImpl::Create(host_impl.active_tree(), 1));
LayerImpl* sublayer = sublayer_scoped_ptr.get();
sublayer->SetContentsScale(kPageScale * kDeviceScale,
kPageScale * kDeviceScale);
SetLayerPropertiesForTesting(sublayer,
identity_matrix,
gfx::Point(),
gfx::PointF(),
gfx::Size(500, 500),
true,
false);
scoped_ptr<LayerImpl> scroll_layer_scoped_ptr(
LayerImpl::Create(host_impl.active_tree(), 2));
LayerImpl* scroll_layer = scroll_layer_scoped_ptr.get();
SetLayerPropertiesForTesting(scroll_layer,
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(10, 20),
true,
false);
scoped_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());
scroll_layer->SetScrollDelta(kScrollDelta);
gfx::Transform impl_transform;
scroll_layer->AddChild(sublayer_scoped_ptr.Pass());
LayerImpl* scroll_layer_raw_ptr = scroll_layer_scoped_ptr.get();
clip_layer->AddChild(scroll_layer_scoped_ptr.Pass());
scroll_layer_raw_ptr->SetScrollOffset(kScrollOffset);
scoped_ptr<LayerImpl> root(LayerImpl::Create(host_impl.active_tree(), 3));
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(3, 4),
true,
false);
root->AddChild(clip_layer_scoped_ptr.Pass());
ExecuteCalculateDrawProperties(
root.get(), kDeviceScale, kPageScale, scroll_layer->parent());
gfx::Transform expected_transform = identity_matrix;
gfx::PointF sub_layer_screen_position = kScrollLayerPosition - kScrollDelta;
sub_layer_screen_position.Scale(kPageScale * kDeviceScale);
expected_transform.Translate(MathUtil::Round(sub_layer_screen_position.x()),
MathUtil::Round(sub_layer_screen_position.y()));
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_transform,
sublayer->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_transform,
sublayer->screen_space_transform());
gfx::Transform arbitrary_translate;
const float kTranslateX = 10.6f;
const float kTranslateY = 20.6f;
arbitrary_translate.Translate(kTranslateX, kTranslateY);
SetLayerPropertiesForTesting(scroll_layer,
arbitrary_translate,
gfx::PointF(),
gfx::PointF(),
gfx::Size(10, 20),
true,
false);
ExecuteCalculateDrawProperties(
root.get(), kDeviceScale, kPageScale, scroll_layer->parent());
expected_transform.MakeIdentity();
expected_transform.Translate(
MathUtil::Round(kTranslateX * kPageScale * kDeviceScale +
sub_layer_screen_position.x()),
MathUtil::Round(kTranslateY * kPageScale * kDeviceScale +
sub_layer_screen_position.y()));
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_transform,
sublayer->draw_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformsForSimpleHierarchy) {
gfx::Transform identity_matrix;
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<Layer> grand_child = Layer::Create();
root->AddChild(parent);
parent->AddChild(child);
child->AddChild(grand_child);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
// One-time setup of root layer
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(1, 2),
true,
false);
// Case 1: parent's anchor point should not affect child or grand_child.
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::PointF(0.25f, 0.25f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(76, 78),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
child->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
grand_child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
grand_child->screen_space_transform());
// Case 2: parent's position affects child and grand_child.
gfx::Transform parent_position_transform;
parent_position_transform.Translate(0.f, 1.2f);
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::PointF(0.25f, 0.25f),
gfx::PointF(0.f, 1.2f),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(76, 78),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_position_transform,
child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_position_transform,
child->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_position_transform,
grand_child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_position_transform,
grand_child->screen_space_transform());
// 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);
SetLayerPropertiesForTesting(parent.get(),
parent_layer_transform,
gfx::PointF(0.25f, 0.25f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(76, 78),
true,
false);
ExecuteCalculateDrawProperties(root.get());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_composite_transform,
child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_composite_transform,
child->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_composite_transform,
grand_child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_composite_transform,
grand_child->screen_space_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformsForSingleRenderSurface) {
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> grand_child =
make_scoped_refptr(new LayerWithForcedDrawsContent());
root->AddChild(parent);
parent->AddChild(child);
child->AddChild(grand_child);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
// One-time setup of root layer
gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(1, 2),
true,
false);
// Child is set up so that a new render surface should be created.
child->SetOpacity(0.5f);
child->SetForceRenderSurface(true);
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);
// Child's render surface should not exist yet.
ASSERT_FALSE(child->render_surface());
SetLayerPropertiesForTesting(parent.get(),
parent_layer_transform,
gfx::PointF(0.25f, 0.25f),
gfx::PointF(),
gfx::Size(100, 120),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(8, 10),
true,
false);
ExecuteCalculateDrawProperties(root.get());
// Render surface should have been created now.
ASSERT_TRUE(child->render_surface());
ASSERT_EQ(child, 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->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(parent_composite_transform,
child->screen_space_transform());
// 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()->render_surface()->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()->render_surface()->screen_space_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformsForReplica) {
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<Layer> child_replica = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> grand_child =
make_scoped_refptr(new LayerWithForcedDrawsContent());
root->AddChild(parent);
parent->AddChild(child);
child->AddChild(grand_child);
child->SetReplicaLayer(child_replica.get());
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
// One-time setup of root layer
gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(1, 2),
true,
false);
// Child is set up so that a new render surface should be created.
child->SetOpacity(0.5f);
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);
gfx::Transform replica_layer_transform;
replica_layer_transform.Scale3d(3.0, 3.0, 1.0);
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 replica_composite_transform =
parent_composite_transform * replica_layer_transform *
Inverse(surface_sublayer_transform);
// Child's render surface should not exist yet.
ASSERT_FALSE(child->render_surface());
SetLayerPropertiesForTesting(parent.get(),
parent_layer_transform,
gfx::PointF(0.25f, 0.25f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(-0.5f, -0.5f),
gfx::Size(1, 1),
true,
false);
SetLayerPropertiesForTesting(child_replica.get(),
replica_layer_transform,
gfx::PointF(),
gfx::PointF(),
gfx::Size(),
true,
false);
ExecuteCalculateDrawProperties(root.get());
// Render surface should have been created now.
ASSERT_TRUE(child->render_surface());
ASSERT_EQ(child, child->render_target());
EXPECT_TRANSFORMATION_MATRIX_EQ(
replica_composite_transform,
child->render_target()->render_surface()->replica_draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(replica_composite_transform,
child->render_target()
->render_surface()
->replica_screen_space_transform());
}
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
// - Replicas of a render surface are described w.r.t. the replica's
// transform around its anchor, along with the surface itself.
// - 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.
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> render_surface1 = Layer::Create();
scoped_refptr<Layer> render_surface2 = Layer::Create();
scoped_refptr<Layer> child_of_root = Layer::Create();
scoped_refptr<Layer> child_of_rs1 = Layer::Create();
scoped_refptr<Layer> child_of_rs2 = Layer::Create();
scoped_refptr<Layer> replica_of_rs1 = Layer::Create();
scoped_refptr<Layer> replica_of_rs2 = Layer::Create();
scoped_refptr<Layer> grand_child_of_root = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> grand_child_of_rs1 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> grand_child_of_rs2 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
root->AddChild(parent);
parent->AddChild(render_surface1);
parent->AddChild(child_of_root);
render_surface1->AddChild(child_of_rs1);
render_surface1->AddChild(render_surface2);
render_surface2->AddChild(child_of_rs2);
child_of_root->AddChild(grand_child_of_root);
child_of_rs1->AddChild(grand_child_of_rs1);
child_of_rs2->AddChild(grand_child_of_rs2);
render_surface1->SetReplicaLayer(replica_of_rs1.get());
render_surface2->SetReplicaLayer(replica_of_rs2.get());
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
// In combination with descendant draws content, opacity != 1 forces the layer
// to have a new render surface.
render_surface1->SetOpacity(0.5f);
render_surface2->SetOpacity(0.33f);
// One-time setup of root layer
gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::PointF(),
gfx::PointF(),
gfx::Size(1, 2),
true,
false);
// 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,
// Matrix "R" is the composite replica transform used in all replica 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 replica_layer_transform;
replica_layer_transform.Scale3d(-2.0, 5.0, 1.0);
gfx::Transform A =
translation_to_anchor * layer_transform * Inverse(translation_to_anchor);
gfx::Transform R = A * translation_to_anchor * replica_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);
SetLayerPropertiesForTesting(parent.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface1.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface2.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_root.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_rs1.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_rs2.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_root.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_rs1.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_rs2.get(),
layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(replica_of_rs1.get(),
replica_layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(),
true,
false);
SetLayerPropertiesForTesting(replica_of_rs2.get(),
replica_layer_transform,
gfx::PointF(0.25f, 0.f),
gfx::PointF(),
gfx::Size(),
true,
false);
ExecuteCalculateDrawProperties(root.get());
// Only layers that are associated with render surfaces should have an actual
// RenderSurface() value.
ASSERT_TRUE(root->render_surface());
ASSERT_FALSE(child_of_root->render_surface());
ASSERT_FALSE(grand_child_of_root->render_surface());
ASSERT_TRUE(render_surface1->render_surface());
ASSERT_FALSE(child_of_rs1->render_surface());
ASSERT_FALSE(grand_child_of_rs1->render_surface());
ASSERT_TRUE(render_surface2->render_surface());
ASSERT_FALSE(child_of_rs2->render_surface());
ASSERT_FALSE(grand_child_of_rs2->render_surface());
// Verify all render target accessors
EXPECT_EQ(root, parent->render_target());
EXPECT_EQ(root, child_of_root->render_target());
EXPECT_EQ(root, grand_child_of_root->render_target());
EXPECT_EQ(render_surface1, render_surface1->render_target());
EXPECT_EQ(render_surface1, child_of_rs1->render_target());
EXPECT_EQ(render_surface1, grand_child_of_rs1->render_target());
EXPECT_EQ(render_surface2, render_surface2->render_target());
EXPECT_EQ(render_surface2, child_of_rs2->render_target());
EXPECT_EQ(render_surface2, 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->draw_transform());