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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/animation/transform_operations.h"
#include "cc/base/math_util.h"
#include "cc/layers/content_layer.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.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/test/layer_tree_host_common_test.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/transform.h"
namespace cc {
namespace {
class LayerWithForcedDrawsContent : public Layer {
public:
LayerWithForcedDrawsContent() : Layer(), last_device_scale_factor_(0.f) {}
virtual bool DrawsContent() const OVERRIDE;
virtual void CalculateContentsScale(float ideal_contents_scale,
float device_scale_factor,
float page_scale_factor,
float maximum_animation_contents_scale,
bool animating_transform_to_screen,
float* contents_scale_x,
float* contents_scale_y,
gfx::Size* content_bounds) OVERRIDE;
float last_device_scale_factor() const { return last_device_scale_factor_; }
private:
virtual ~LayerWithForcedDrawsContent() {}
// Parameters from last CalculateContentsScale.
float last_device_scale_factor_;
};
bool LayerWithForcedDrawsContent::DrawsContent() const { return true; }
void LayerWithForcedDrawsContent::CalculateContentsScale(
float ideal_contents_scale,
float device_scale_factor,
float page_scale_factor,
float maximum_animation_contents_scale,
bool animating_transform_to_screen,
float* contents_scale_x,
float* contents_scale_y,
gfx::Size* content_bounds) {
last_device_scale_factor_ = device_scale_factor;
Layer::CalculateContentsScale(ideal_contents_scale,
device_scale_factor,
page_scale_factor,
maximum_animation_contents_scale,
animating_transform_to_screen,
contents_scale_x,
contents_scale_y,
content_bounds);
}
class MockContentLayerClient : public ContentLayerClient {
public:
MockContentLayerClient() {}
virtual ~MockContentLayerClient() {}
virtual void PaintContents(
SkCanvas* canvas,
const gfx::Rect& clip,
gfx::RectF* opaque,
ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE {}
virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
virtual bool FillsBoundsCompletely() const OVERRIDE { return false; }
};
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::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
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, DoNotSkipLayersWithHandlers) {
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::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(10, 10),
gfx::Size(100, 100),
true,
false);
// This would have previously caused us to skip our subtree, but this would be
// wrong; we need up-to-date draw properties to do hit testing on the layers
// with handlers.
child->SetOpacity(0.f);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(10, 10),
gfx::Size(100, 100),
true,
false);
grand_child->SetTouchEventHandlerRegion(gfx::Rect(0, 0, 100, 100));
ExecuteCalculateDrawProperties(parent.get());
// Check that we've computed draw properties for the subtree rooted at
// |child|.
EXPECT_FALSE(child->draw_transform().IsIdentity());
EXPECT_FALSE(grand_child->draw_transform().IsIdentity());
}
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::Point3F(),
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::Point3F(),
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::Point3F(2.5f, 3.0f, 0.f),
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::Point3F(2.5f, 3.0f, 0.f),
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::Point3F(),
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::Point3F(5.0f, 0.f, 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::Point3F(5.0f, 0.f, 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;
TestSharedBitmapManager shared_bitmap_manager;
FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager);
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::Point3F(),
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::Point3F(),
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::Point3F(),
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::Point3F(),
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::Point3F(),
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::Point3F(2.5f, 3.0f, 0.f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
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::Point3F(2.5f, 3.0f, 0.f),
gfx::PointF(0.f, 1.2f),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
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::Point3F(2.5f, 3.0f, 0.f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
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::Point3F(),
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::Point3F(25.0f, 30.0f, 0.f),
gfx::PointF(),
gfx::Size(100, 120),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
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::Point3F(),
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::Point3F(2.5f, 3.0f, 0.f),
gfx::PointF(),
gfx::Size(10, 12),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(16, 18),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(-0.5f, -0.5f),
gfx::Size(1, 1),
true,
false);
SetLayerPropertiesForTesting(child_replica.get(),
replica_layer_transform,
gfx::Point3F(),
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::Point3F(),
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::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface1.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface2.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_root.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_rs1.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_rs2.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_root.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_rs1.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_rs2.get(),
layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(replica_of_rs1.get(),
replica_layer_transform,
gfx::Point3F(2.5f, 0.f, 0.f),
gfx::PointF(),
gfx::Size(),
true,
false);
SetLayerPropertiesForTesting(replica_of_rs2.get(),
replica_layer_transform,
gfx::Point3F(2.5f, 0.f, 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());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A, child_of_root->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A,
grand_child_of_root->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS1, render_surface1->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS1 * A, child_of_rs1->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS1 * A * A,
grand_child_of_rs1->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS2, render_surface2->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS2 * A, child_of_rs2->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(SS2 * A * A,
grand_child_of_rs2->draw_transform());
// Verify layer screen-space transforms
//
EXPECT_TRANSFORMATION_MATRIX_EQ(A, parent->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A,
child_of_root->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * A * A, grand_child_of_root->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A,
render_surface1->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A,
child_of_rs1->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A * A,
grand_child_of_rs1->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A,
render_surface2->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A * A,
child_of_rs2->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(A * A * A * A * A,
grand_child_of_rs2->screen_space_transform());
// 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->render_surface()->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * R * S1, render_surface1->render_surface()->replica_draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * A * S1, render_surface1->render_surface()->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * R * S1,
render_surface1->render_surface()->replica_screen_space_transform());
// Draw transform of render surface 2 is described with respect to render
// surface 1.
EXPECT_TRANSFORMATION_MATRIX_EQ(
SS1 * A * S2, render_surface2->render_surface()->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
SS1 * R * S2,
render_surface2->render_surface()->replica_draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * A * A * S2,
render_surface2->render_surface()->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
A * A * R * S2,
render_surface2->render_surface()->replica_screen_space_transform());
// Sanity check. If these fail there is probably a bug in the test itself. It
// is expected that we correctly set up transforms so that the y-component of
// the screen-space transform encodes the "depth" of the layer in the tree.
EXPECT_FLOAT_EQ(1.0, parent->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(2.0,
child_of_root->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(
3.0, grand_child_of_root->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(2.0,
render_surface1->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(3.0,
child_of_rs1->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(
4.0, grand_child_of_rs1->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(3.0,
render_surface2->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(4.0,
child_of_rs2->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(
5.0, grand_child_of_rs2->screen_space_transform().matrix().get(1, 3));
}
TEST_F(LayerTreeHostCommonTest, TransformsForFlatteningLayer) {
// For layers that flatten their subtree, there should be an orthographic
// projection (for x and y values) in the middle of the transform sequence.
// Note that the way the code is currently implemented, it is not expected to
// use a canonical orthographic projection.
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> grand_child =
make_scoped_refptr(new LayerWithForcedDrawsContent());
gfx::Transform rotation_about_y_axis;
rotation_about_y_axis.RotateAboutYAxis(30.0);
const gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child.get(),
rotation_about_y_axis,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
rotation_about_y_axis,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
root->AddChild(child);
child->AddChild(grand_child);
child->SetForceRenderSurface(true);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
// No layers in this test should preserve 3d.
ASSERT_TRUE(root->should_flatten_transform());
ASSERT_TRUE(child->should_flatten_transform());
ASSERT_TRUE(grand_child->should_flatten_transform());
gfx::Transform expected_child_draw_transform = rotation_about_y_axis;
gfx::Transform expected_child_screen_space_transform = rotation_about_y_axis;
gfx::Transform expected_grand_child_draw_transform =
rotation_about_y_axis; // draws onto child's render surface
gfx::Transform flattened_rotation_about_y = rotation_about_y_axis;
flattened_rotation_about_y.FlattenTo2d();
gfx::Transform expected_grand_child_screen_space_transform =
flattened_rotation_about_y * rotation_about_y_axis;
ExecuteCalculateDrawProperties(root.get());
// The child's draw transform should have been taken by its surface.
ASSERT_TRUE(child->render_surface());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_draw_transform,
child->render_surface()->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(
expected_child_screen_space_transform,
child->render_surface()->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_screen_space_transform,
child->screen_space_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_draw_transform,
grand_child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_screen_space_transform,
grand_child->screen_space_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformsForDegenerateIntermediateLayer) {
// A layer that is empty in one axis, but not the other, was accidentally
// skipping a necessary translation. Without that translation, the coordinate
// space of the layer's draw transform is incorrect.
//
// Normally this isn't a problem, because the layer wouldn't be drawn anyway,
// but if that layer becomes a render surface, then its draw transform is
// implicitly inherited by the rest of the subtree, which then is positioned
// incorrectly as a result.
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> grand_child =
make_scoped_refptr(new LayerWithForcedDrawsContent());
// The child height is zero, but has non-zero width that should be accounted
// for while computing draw transforms.
const gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 0),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
root->AddChild(child);
child->AddChild(grand_child);
child->SetForceRenderSurface(true);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
ExecuteCalculateDrawProperties(root.get());
ASSERT_TRUE(child->render_surface());
// This is the real test, the rest are sanity checks.
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
child->render_surface()->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform());
EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix,
grand_child->draw_transform());
}
TEST_F(LayerTreeHostCommonTest, TransformAboveRootLayer) {
// Transformations applied at the root of the tree should be forwarded
// to child layers instead of applied to the root RenderSurface.
const gfx::Transform identity_matrix;
scoped_refptr<LayerWithForcedDrawsContent> root =
new LayerWithForcedDrawsContent;
scoped_refptr<LayerWithForcedDrawsContent> child =
new LayerWithForcedDrawsContent;
child->SetScrollClipLayerId(root->id());
root->AddChild(child);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(20, 20),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(20, 20),
true,
false);
gfx::Transform translate;
translate.Translate(50, 50);
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), root->bounds(), translate, &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
EXPECT_EQ(translate, root->draw_properties().target_space_transform);
EXPECT_EQ(translate, child->draw_properties().target_space_transform);
EXPECT_EQ(identity_matrix, root->render_surface()->draw_transform());
EXPECT_EQ(1.f, root->last_device_scale_factor());
EXPECT_EQ(1.f, child->last_device_scale_factor());
}
gfx::Transform scale;
scale.Scale(2, 2);
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), root->bounds(), scale, &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
EXPECT_EQ(scale, root->draw_properties().target_space_transform);
EXPECT_EQ(scale, child->draw_properties().target_space_transform);
EXPECT_EQ(identity_matrix, root->render_surface()->draw_transform());
EXPECT_EQ(2.f, root->last_device_scale_factor());
EXPECT_EQ(2.f, child->last_device_scale_factor());
}
gfx::Transform rotate;
rotate.Rotate(2);
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), root->bounds(), rotate, &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
EXPECT_EQ(rotate, root->draw_properties().target_space_transform);
EXPECT_EQ(rotate, child->draw_properties().target_space_transform);
EXPECT_EQ(identity_matrix, root->render_surface()->draw_transform());
EXPECT_EQ(1.f, root->last_device_scale_factor());
EXPECT_EQ(1.f, child->last_device_scale_factor());
}
gfx::Transform composite;
composite.ConcatTransform(translate);
composite.ConcatTransform(scale);
composite.ConcatTransform(rotate);
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), root->bounds(), composite, &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
EXPECT_EQ(composite, root->draw_properties().target_space_transform);
EXPECT_EQ(composite, child->draw_properties().target_space_transform);
EXPECT_EQ(identity_matrix, root->render_surface()->draw_transform());
}
// Verify it composes correctly with device scale.
float device_scale_factor = 1.5f;
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), root->bounds(), translate, &render_surface_layer_list);
inputs.device_scale_factor = device_scale_factor;
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
gfx::Transform device_scaled_translate = translate;
device_scaled_translate.Scale(device_scale_factor, device_scale_factor);
EXPECT_EQ(device_scaled_translate,
root->draw_properties().target_space_transform);
EXPECT_EQ(device_scaled_translate,
child->draw_properties().target_space_transform);
EXPECT_EQ(identity_matrix, root->render_surface()->draw_transform());
EXPECT_EQ(device_scale_factor, root->last_device_scale_factor());
EXPECT_EQ(device_scale_factor, child->last_device_scale_factor());
}
// Verify it composes correctly with page scale.
float page_scale_factor = 2.f;
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), root->bounds(), translate, &render_surface_layer_list);
inputs.page_scale_factor = page_scale_factor;
inputs.page_scale_application_layer = root.get();
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
gfx::Transform page_scaled_translate = translate;
page_scaled_translate.Scale(page_scale_factor, page_scale_factor);
EXPECT_EQ(translate, root->draw_properties().target_space_transform);
EXPECT_EQ(page_scaled_translate,
child->draw_properties().target_space_transform);
EXPECT_EQ(identity_matrix, root->render_surface()->draw_transform());
EXPECT_EQ(1.f, root->last_device_scale_factor());
EXPECT_EQ(1.f, child->last_device_scale_factor());
}
// Verify that it composes correctly with transforms directly on root layer.
root->SetTransform(composite);
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), root->bounds(), composite, &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
gfx::Transform compositeSquared = composite;
compositeSquared.ConcatTransform(composite);
EXPECT_TRANSFORMATION_MATRIX_EQ(
compositeSquared, root->draw_properties().target_space_transform);
EXPECT_TRANSFORMATION_MATRIX_EQ(
compositeSquared, child->draw_properties().target_space_transform);
EXPECT_EQ(identity_matrix, root->render_surface()->draw_transform());
}
}
TEST_F(LayerTreeHostCommonTest,
RenderSurfaceListForRenderSurfaceWithClippedLayer) {
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> render_surface1 = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> child =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
const gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(30.f, 30.f),
gfx::Size(10, 10),
true,
false);
parent->AddChild(render_surface1);
parent->SetMasksToBounds(true);
render_surface1->AddChild(child);
render_surface1->SetForceRenderSurface(true);
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(),
parent->bounds(),
gfx::Transform(),
&render_surface_layer_list);
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
// The child layer's content is entirely outside the parent's clip rect, so
// the intermediate render surface should not be listed here, even if it was
// forced to be created. Render surfaces without children or visible content
// are unexpected at draw time (e.g. we might try to create a content texture
// of size 0).
ASSERT_TRUE(parent->render_surface());
EXPECT_EQ(1U, render_surface_layer_list.size());
}
TEST_F(LayerTreeHostCommonTest, RenderSurfaceListForTransparentChild) {
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> render_surface1 = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> child =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
const gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(render_surface1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
parent->AddChild(render_surface1);
render_surface1->AddChild(child);
render_surface1->SetForceRenderSurface(true);
render_surface1->SetOpacity(0.f);
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
// Since the layer is transparent, render_surface1->render_surface() should
// not have gotten added anywhere. Also, the drawable content rect should not
// have been extended by the children.
ASSERT_TRUE(parent->render_surface());
EXPECT_EQ(0U, parent->render_surface()->layer_list().size());
EXPECT_EQ(1U, render_surface_layer_list.size());
EXPECT_EQ(parent->id(), render_surface_layer_list.at(0)->id());
EXPECT_EQ(gfx::Rect(), parent->drawable_content_rect());
}
TEST_F(LayerTreeHostCommonTest, ForceRenderSurface) {
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> render_surface1 = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> child =
make_scoped_refptr(new LayerWithForcedDrawsContent());
render_surface1->SetForceRenderSurface(true);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
const gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
parent->AddChild(render_surface1);
render_surface1->AddChild(child);
// Sanity check before the actual test
EXPECT_FALSE(parent->render_surface());
EXPECT_FALSE(render_surface1->render_surface());
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
// The root layer always creates a render surface
EXPECT_TRUE(parent->render_surface());
EXPECT_TRUE(render_surface1->render_surface());
EXPECT_EQ(2U, render_surface_layer_list.size());
}
{
RenderSurfaceLayerList render_surface_layer_list;
render_surface1->SetForceRenderSurface(false);
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
EXPECT_TRUE(parent->render_surface());
EXPECT_FALSE(render_surface1->render_surface());
EXPECT_EQ(1U, render_surface_layer_list.size());
}
}
TEST_F(LayerTreeHostCommonTest, ClipRectCullsRenderSurfaces) {
// The entire subtree of layers that are outside the clip rect should be
// culled away, and should not affect the render_surface_layer_list.
//
// The test tree is set up as follows:
// - all layers except the leaf_nodes are forced to be a new render surface
// that have something to draw.
// - parent is a large container layer.
// - child has masksToBounds=true to cause clipping.
// - grand_child is positioned outside of the child's bounds
// - great_grand_child is also kept outside child's bounds.
//
// In this configuration, grand_child and great_grand_child are completely
// outside the clip rect, and they should never get scheduled on the list of
// render surfaces.
//
const gfx::Transform identity_matrix;
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<Layer> grand_child = Layer::Create();
scoped_refptr<Layer> great_grand_child = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> leaf_node1 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> leaf_node2 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
parent->AddChild(child);
child->AddChild(grand_child);
grand_child->AddChild(great_grand_child);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
// leaf_node1 ensures that parent and child are kept on the
// render_surface_layer_list, even though grand_child and great_grand_child
// should be clipped.
child->AddChild(leaf_node1);
great_grand_child->AddChild(leaf_node2);
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(500, 500),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(20, 20),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(45.f, 45.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(great_grand_child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(leaf_node1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(500, 500),
true,
false);
SetLayerPropertiesForTesting(leaf_node2.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(20, 20),
true,
false);
child->SetMasksToBounds(true);
child->SetOpacity(0.4f);
child->SetForceRenderSurface(true);
grand_child->SetOpacity(0.5f);
great_grand_child->SetOpacity(0.4f);
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
ASSERT_EQ(2U, render_surface_layer_list.size());
EXPECT_EQ(parent->id(), render_surface_layer_list.at(0)->id());
EXPECT_EQ(child->id(), render_surface_layer_list.at(1)->id());
}
TEST_F(LayerTreeHostCommonTest, ClipRectCullsSurfaceWithoutVisibleContent) {
// When a render surface has a clip rect, it is used to clip the content rect
// of the surface. When the render surface is animating its transforms, then
// the content rect's position in the clip rect is not defined on the main
// thread, and its content rect should not be clipped.
// The test tree is set up as follows:
// - parent is a container layer that masksToBounds=true to cause clipping.
// - child is a render surface, which has a clip rect set to the bounds of
// the parent.
// - grand_child is a render surface, and the only visible content in child.
// It is positioned outside of the clip rect from parent.
// In this configuration, grand_child should be outside the clipped
// content rect of the child, making grand_child not appear in the
// render_surface_layer_list. However, when we place an animation on the
// child, this clipping should be avoided and we should keep the grand_child
// in the render_surface_layer_list.
const gfx::Transform identity_matrix;
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<Layer> grand_child = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> leaf_node =
make_scoped_refptr(new LayerWithForcedDrawsContent());
parent->AddChild(child);
child->AddChild(grand_child);
grand_child->AddChild(leaf_node);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(20, 20),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(200.f, 200.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(leaf_node.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
parent->SetMasksToBounds(true);
child->SetOpacity(0.4f);
child->SetForceRenderSurface(true);
grand_child->SetOpacity(0.4f);
grand_child->SetForceRenderSurface(true);
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
// Without an animation, we should cull child and grand_child from the
// render_surface_layer_list.
ASSERT_EQ(1U, render_surface_layer_list.size());
EXPECT_EQ(parent->id(), render_surface_layer_list.at(0)->id());
}
// Now put an animating transform on child.
AddAnimatedTransformToController(
child->layer_animation_controller(), 10.0, 30, 0);
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
// With an animating transform, we should keep child and grand_child in the
// render_surface_layer_list.
ASSERT_EQ(3U, render_surface_layer_list.size());
EXPECT_EQ(parent->id(), render_surface_layer_list.at(0)->id());
EXPECT_EQ(child->id(), render_surface_layer_list.at(1)->id());
EXPECT_EQ(grand_child->id(), render_surface_layer_list.at(2)->id());
}
}
TEST_F(LayerTreeHostCommonTest, IsClippedIsSetCorrectly) {
// Layer's IsClipped() property is set to true when:
// - the layer clips its subtree, e.g. masks to bounds,
// - the layer is clipped by an ancestor that contributes to the same
// render target,
// - a surface is clipped by an ancestor that contributes to the same
// render target.
//
// In particular, for a layer that owns a render surface:
// - the render surface inherits any clip from ancestors, and does NOT
// pass that clipped status to the layer itself.
// - but if the layer itself masks to bounds, it is considered clipped
// and propagates the clip to the subtree.
const gfx::Transform identity_matrix;
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child1 = Layer::Create();
scoped_refptr<Layer> child2 = Layer::Create();
scoped_refptr<Layer> grand_child = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> leaf_node1 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> leaf_node2 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
root->AddChild(parent);
parent->AddChild(child1);
parent->AddChild(child2);
child1->AddChild(grand_child);
child2->AddChild(leaf_node2);
grand_child->AddChild(leaf_node1);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
child2->SetForceRenderSurface(true);
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child2.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(grand_child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(leaf_node1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(leaf_node2.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
// Case 1: nothing is clipped except the root render surface.
{
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
ASSERT_TRUE(root->render_surface());
ASSERT_TRUE(child2->render_surface());
EXPECT_FALSE(root->is_clipped());
EXPECT_TRUE(root->render_surface()->is_clipped());
EXPECT_FALSE(parent->is_clipped());
EXPECT_FALSE(child1->is_clipped());
EXPECT_FALSE(child2->is_clipped());
EXPECT_FALSE(child2->render_surface()->is_clipped());
EXPECT_FALSE(grand_child->is_clipped());
EXPECT_FALSE(leaf_node1->is_clipped());
EXPECT_FALSE(leaf_node2->is_clipped());
}
// Case 2: parent masksToBounds, so the parent, child1, and child2's
// surface are clipped. But layers that contribute to child2's surface are
// not clipped explicitly because child2's surface already accounts for
// that clip.
{
RenderSurfaceLayerList render_surface_layer_list;
parent->SetMasksToBounds(true);
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
ASSERT_TRUE(root->render_surface());
ASSERT_TRUE(child2->render_surface());
EXPECT_FALSE(root->is_clipped());
EXPECT_TRUE(root->render_surface()->is_clipped());
EXPECT_TRUE(parent->is_clipped());
EXPECT_TRUE(child1->is_clipped());
EXPECT_FALSE(child2->is_clipped());
EXPECT_TRUE(child2->render_surface()->is_clipped());
EXPECT_TRUE(grand_child->is_clipped());
EXPECT_TRUE(leaf_node1->is_clipped());
EXPECT_FALSE(leaf_node2->is_clipped());
}
// Case 3: child2 masksToBounds. The layer and subtree are clipped, and
// child2's render surface is not clipped.
{
RenderSurfaceLayerList render_surface_layer_list;
parent->SetMasksToBounds(false);
child2->SetMasksToBounds(true);
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
root.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
ASSERT_TRUE(root->render_surface());
ASSERT_TRUE(child2->render_surface());
EXPECT_FALSE(root->is_clipped());
EXPECT_TRUE(root->render_surface()->is_clipped());
EXPECT_FALSE(parent->is_clipped());
EXPECT_FALSE(child1->is_clipped());
EXPECT_TRUE(child2->is_clipped());
EXPECT_FALSE(child2->render_surface()->is_clipped());
EXPECT_FALSE(grand_child->is_clipped());
EXPECT_FALSE(leaf_node1->is_clipped());
EXPECT_TRUE(leaf_node2->is_clipped());
}
}
TEST_F(LayerTreeHostCommonTest, DrawableContentRectForLayers) {
// Verify that layers get the appropriate DrawableContentRect when their
// parent masksToBounds is true.
//
// grand_child1 - completely inside the region; DrawableContentRect should
// be the layer rect expressed in target space.
// grand_child2 - partially clipped but NOT masksToBounds; the clip rect
// will be the intersection of layer bounds and the mask region.
// grand_child3 - partially clipped and masksToBounds; the
// DrawableContentRect will still be the intersection of layer bounds and
// the mask region.
// grand_child4 - outside parent's clip rect; the DrawableContentRect should
// be empty.
//
const gfx::Transform identity_matrix;
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<Layer> grand_child1 = Layer::Create();
scoped_refptr<Layer> grand_child2 = Layer::Create();
scoped_refptr<Layer> grand_child3 = Layer::Create();
scoped_refptr<Layer> grand_child4 = Layer::Create();
parent->AddChild(child);
child->AddChild(grand_child1);
child->AddChild(grand_child2);
child->AddChild(grand_child3);
child->AddChild(grand_child4);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(500, 500),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(20, 20),
true,
false);
SetLayerPropertiesForTesting(grand_child1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(5.f, 5.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child2.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(15.f, 15.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child3.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(15.f, 15.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child4.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(45.f, 45.f),
gfx::Size(10, 10),
true,
false);
child->SetMasksToBounds(true);
grand_child3->SetMasksToBounds(true);
// Force everyone to be a render surface.
child->SetOpacity(0.4f);
grand_child1->SetOpacity(0.5f);
grand_child2->SetOpacity(0.5f);
grand_child3->SetOpacity(0.5f);
grand_child4->SetOpacity(0.5f);
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
EXPECT_RECT_EQ(gfx::Rect(5, 5, 10, 10),
grand_child1->drawable_content_rect());
EXPECT_RECT_EQ(gfx::Rect(15, 15, 5, 5),
grand_child3->drawable_content_rect());
EXPECT_RECT_EQ(gfx::Rect(15, 15, 5, 5),
grand_child3->drawable_content_rect());
EXPECT_TRUE(grand_child4->drawable_content_rect().IsEmpty());
}
TEST_F(LayerTreeHostCommonTest, ClipRectIsPropagatedCorrectlyToSurfaces) {
// Verify that render surfaces (and their layers) get the appropriate
// clip rects when their parent masksToBounds is true.
//
// Layers that own render surfaces (at least for now) do not inherit any
// clipping; instead the surface will enforce the clip for the entire subtree.
// They may still have a clip rect of their own layer bounds, however, if
// masksToBounds was true.
const gfx::Transform identity_matrix;
scoped_refptr<Layer> parent = Layer::Create();
scoped_refptr<Layer> child = Layer::Create();
scoped_refptr<Layer> grand_child1 = Layer::Create();
scoped_refptr<Layer> grand_child2 = Layer::Create();
scoped_refptr<Layer> grand_child3 = Layer::Create();
scoped_refptr<Layer> grand_child4 = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> leaf_node1 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> leaf_node2 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> leaf_node3 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> leaf_node4 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
parent->AddChild(child);
child->AddChild(grand_child1);
child->AddChild(grand_child2);
child->AddChild(grand_child3);
child->AddChild(grand_child4);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
// the leaf nodes ensure that these grand_children become render surfaces for
// this test.
grand_child1->AddChild(leaf_node1);
grand_child2->AddChild(leaf_node2);
grand_child3->AddChild(leaf_node3);
grand_child4->AddChild(leaf_node4);
SetLayerPropertiesForTesting(parent.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(500, 500),
true,
false);
SetLayerPropertiesForTesting(child.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(20, 20),
true,
false);
SetLayerPropertiesForTesting(grand_child1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(5.f, 5.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child2.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(15.f, 15.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child3.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(15.f, 15.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child4.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(45.f, 45.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(leaf_node1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(leaf_node2.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(leaf_node3.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(leaf_node4.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(10, 10),
true,
false);
child->SetMasksToBounds(true);
grand_child3->SetMasksToBounds(true);
grand_child4->SetMasksToBounds(true);
// Force everyone to be a render surface.
child->SetOpacity(0.4f);
child->SetForceRenderSurface(true);
grand_child1->SetOpacity(0.5f);
grand_child1->SetForceRenderSurface(true);
grand_child2->SetOpacity(0.5f);
grand_child2->SetForceRenderSurface(true);
grand_child3->SetOpacity(0.5f);
grand_child3->SetForceRenderSurface(true);
grand_child4->SetOpacity(0.5f);
grand_child4->SetForceRenderSurface(true);
RenderSurfaceLayerList render_surface_layer_list;
LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
parent.get(), parent->bounds(), &render_surface_layer_list);
inputs.can_adjust_raster_scales = true;
LayerTreeHostCommon::CalculateDrawProperties(&inputs);
ASSERT_TRUE(grand_child1->render_surface());
ASSERT_TRUE(grand_child2->render_surface());
ASSERT_TRUE(grand_child3->render_surface());
// Surfaces are clipped by their parent, but un-affected by the owning layer's
// masksToBounds.
EXPECT_RECT_EQ(gfx::Rect(0, 0, 20, 20),
grand_child1->render_surface()->clip_rect());
EXPECT_RECT_EQ(gfx::Rect(0, 0, 20, 20),
grand_child2->render_surface()->clip_rect());
EXPECT_RECT_EQ(gfx::Rect(0, 0, 20, 20),
grand_child3->render_surface()->clip_rect());
}
TEST_F(LayerTreeHostCommonTest, AnimationsForRenderSurfaceHierarchy) {
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> 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());
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);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(parent);
// Make our render surfaces.
render_surface1->SetForceRenderSurface(true);
render_surface2->SetForceRenderSurface(true);
gfx::Transform layer_transform;
layer_transform.Translate(1.0, 1.0);
SetLayerPropertiesForTesting(parent.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface1.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(render_surface2.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_root.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_rs1.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(child_of_rs2.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_root.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_rs1.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
SetLayerPropertiesForTesting(grand_child_of_rs2.get(),
layer_transform,
gfx::Point3F(0.25f, 0.f, 0.f),
gfx::PointF(2.5f, 0.f),
gfx::Size(10, 10),
true,
false);
// Put an animated opacity on the render surface.
AddOpacityTransitionToController(
render_surface1->layer_animation_controller(), 10.0, 1.f, 0.f, false);
// Also put an animated opacity on a layer without descendants.
AddOpacityTransitionToController(
grand_child_of_root->layer_animation_controller(), 10.0, 1.f, 0.f, false);
// Put a transform animation on the render surface.
AddAnimatedTransformToController(
render_surface2->layer_animation_controller(), 10.0, 30, 0);
// Also put transform animations on grand_child_of_root, and
// grand_child_of_rs2
AddAnimatedTransformToController(
grand_child_of_root->layer_animation_controller(), 10.0, 30, 0);
AddAnimatedTransformToController(
grand_child_of_rs2->layer_animation_controller(), 10.0, 30, 0);
ExecuteCalculateDrawProperties(parent.get());
// Only layers that are associated with render surfaces should have an actual
// RenderSurface() value.
ASSERT_TRUE(parent->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(parent, parent->render_target());
EXPECT_EQ(parent, child_of_root->render_target());
EXPECT_EQ(parent, 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 draw_opacity_is_animating values
EXPECT_FALSE(parent->draw_opacity_is_animating());
EXPECT_FALSE(child_of_root->draw_opacity_is_animating());
EXPECT_TRUE(grand_child_of_root->draw_opacity_is_animating());
EXPECT_FALSE(render_surface1->draw_opacity_is_animating());
EXPECT_TRUE(render_surface1->render_surface()->draw_opacity_is_animating());
EXPECT_FALSE(child_of_rs1->draw_opacity_is_animating());
EXPECT_FALSE(grand_child_of_rs1->draw_opacity_is_animating());
EXPECT_FALSE(render_surface2->draw_opacity_is_animating());
EXPECT_FALSE(render_surface2->render_surface()->draw_opacity_is_animating());
EXPECT_FALSE(child_of_rs2->draw_opacity_is_animating());
EXPECT_FALSE(grand_child_of_rs2->draw_opacity_is_animating());
// Verify draw_transform_is_animating values
EXPECT_FALSE(parent->draw_transform_is_animating());
EXPECT_FALSE(child_of_root->draw_transform_is_animating());
EXPECT_TRUE(grand_child_of_root->draw_transform_is_animating());
EXPECT_FALSE(render_surface1->draw_transform_is_animating());
EXPECT_FALSE(render_surface1->render_surface()
->target_surface_transforms_are_animating());
EXPECT_FALSE(child_of_rs1->draw_transform_is_animating());
EXPECT_FALSE(grand_child_of_rs1->draw_transform_is_animating());
EXPECT_FALSE(render_surface2->draw_transform_is_animating());
EXPECT_TRUE(render_surface2->render_surface()
->target_surface_transforms_are_animating());
EXPECT_FALSE(child_of_rs2->draw_transform_is_animating());
EXPECT_TRUE(grand_child_of_rs2->draw_transform_is_animating());
// Verify screen_space_transform_is_animating values
EXPECT_FALSE(parent->screen_space_transform_is_animating());
EXPECT_FALSE(child_of_root->screen_space_transform_is_animating());
EXPECT_TRUE(grand_child_of_root->screen_space_transform_is_animating());
EXPECT_FALSE(render_surface1->screen_space_transform_is_animating());
EXPECT_FALSE(render_surface1->render_surface()
->screen_space_transforms_are_animating());
EXPECT_FALSE(child_of_rs1->screen_space_transform_is_animating());
EXPECT_FALSE(grand_child_of_rs1->screen_space_transform_is_animating());
EXPECT_TRUE(render_surface2->screen_space_transform_is_animating());
EXPECT_TRUE(render_surface2->render_surface()
->screen_space_transforms_are_animating());
EXPECT_TRUE(child_of_rs2->screen_space_transform_is_animating());
EXPECT_TRUE(grand_child_of_rs2->screen_space_transform_is_animating());
// Sanity check. If these fail there is probably a bug in the test itself.
// It is expected that we correctly set up transforms so that the y-component
// of the screen-space transform encodes the "depth" of the layer in the tree.
EXPECT_FLOAT_EQ(1.0, parent->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(2.0,
child_of_root->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(
3.0, grand_child_of_root->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(2.0,
render_surface1->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(3.0,
child_of_rs1->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(
4.0, grand_child_of_rs1->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(3.0,
render_surface2->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(4.0,
child_of_rs2->screen_space_transform().matrix().get(1, 3));
EXPECT_FLOAT_EQ(
5.0, grand_child_of_rs2->screen_space_transform().matrix().get(1, 3));
}
TEST_F(LayerTreeHostCommonTest, VisibleRectForIdentityTransform) {
// Test the calculateVisibleRect() function works correctly for identity
// transforms.
gfx::Rect target_surface_rect = gfx::Rect(0, 0, 100, 100);
gfx::Transform layer_to_surface_transform;
// Case 1: Layer is contained within the surface.
gfx::Rect layer_content_rect = gfx::Rect(10, 10, 30, 30);
gfx::Rect expected = gfx::Rect(10, 10, 30, 30);
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
// Case 2: Layer is outside the surface rect.
layer_content_rect = gfx::Rect(120, 120, 30, 30);
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_TRUE(actual.IsEmpty());
// Case 3: Layer is partially overlapping the surface rect.
layer_content_rect = gfx::Rect(80, 80, 30, 30);
expected = gfx::Rect(80, 80, 20, 20);
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
}
TEST_F(LayerTreeHostCommonTest, VisibleRectForTranslations) {
// Test the calculateVisibleRect() function works correctly for scaling
// transforms.
gfx::Rect target_surface_rect = gfx::Rect(0, 0, 100, 100);
gfx::Rect layer_content_rect = gfx::Rect(0, 0, 30, 30);
gfx::Transform layer_to_surface_transform;
// Case 1: Layer is contained within the surface.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(10.0, 10.0);
gfx::Rect expected = gfx::Rect(0, 0, 30, 30);
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
// Case 2: Layer is outside the surface rect.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(120.0, 120.0);
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_TRUE(actual.IsEmpty());
// Case 3: Layer is partially overlapping the surface rect.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(80.0, 80.0);
expected = gfx::Rect(0, 0, 20, 20);
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
}
TEST_F(LayerTreeHostCommonTest, VisibleRectFor2DRotations) {
// Test the calculateVisibleRect() function works correctly for rotations
// about z-axis (i.e. 2D rotations). Remember that calculateVisibleRect()
// should return the g in the layer's space.
gfx::Rect target_surface_rect = gfx::Rect(0, 0, 100, 100);
gfx::Rect layer_content_rect = gfx::Rect(0, 0, 30, 30);
gfx::Transform layer_to_surface_transform;
// Case 1: Layer is contained within the surface.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(50.0, 50.0);
layer_to_surface_transform.Rotate(45.0);
gfx::Rect expected = gfx::Rect(0, 0, 30, 30);
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
// Case 2: Layer is outside the surface rect.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(-50.0, 0.0);
layer_to_surface_transform.Rotate(45.0);
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_TRUE(actual.IsEmpty());
// Case 3: The layer is rotated about its top-left corner. In surface space,
// the layer is oriented diagonally, with the left half outside of the render
// surface. In this case, the g should still be the entire layer
// (remember the g is computed in layer space); both the top-left
// and bottom-right corners of the layer are still visible.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Rotate(45.0);
expected = gfx::Rect(0, 0, 30, 30);
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
// Case 4: The layer is rotated about its top-left corner, and translated
// upwards. In surface space, the layer is oriented diagonally, with only the
// top corner of the surface overlapping the layer. In layer space, the render
// surface overlaps the right side of the layer. The g should be
// the layer's right half.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(0.0, -sqrt(2.0) * 15.0);
layer_to_surface_transform.Rotate(45.0);
expected = gfx::Rect(15, 0, 15, 30); // Right half of layer bounds.
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
}
TEST_F(LayerTreeHostCommonTest, VisibleRectFor3dOrthographicTransform) {
// Test that the calculateVisibleRect() function works correctly for 3d
// transforms.
gfx::Rect target_surface_rect = gfx::Rect(0, 0, 100, 100);
gfx::Rect layer_content_rect = gfx::Rect(0, 0, 100, 100);
gfx::Transform layer_to_surface_transform;
// Case 1: Orthographic projection of a layer rotated about y-axis by 45
// degrees, should be fully contained in the render surface.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.RotateAboutYAxis(45.0);
gfx::Rect expected = gfx::Rect(0, 0, 100, 100);
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
// Case 2: Orthographic projection of a layer rotated about y-axis by 45
// degrees, but shifted to the side so only the right-half the layer would be
// visible on the surface.
// 100 is the un-rotated layer width; divided by sqrt(2) is the rotated width.
SkMScalar half_width_of_rotated_layer =
SkDoubleToMScalar((100.0 / sqrt(2.0)) * 0.5);
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(-half_width_of_rotated_layer, 0.0);
layer_to_surface_transform.RotateAboutYAxis(45.0); // Rotates about the left
// edge of the layer.
expected = gfx::Rect(50, 0, 50, 100); // Tight half of the layer.
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
}
TEST_F(LayerTreeHostCommonTest, VisibleRectFor3dPerspectiveTransform) {
// Test the calculateVisibleRect() function works correctly when the layer has
// a perspective projection onto the target surface.
gfx::Rect target_surface_rect = gfx::Rect(0, 0, 100, 100);
gfx::Rect layer_content_rect = gfx::Rect(-50, -50, 200, 200);
gfx::Transform layer_to_surface_transform;
// Case 1: Even though the layer is twice as large as the surface, due to
// perspective foreshortening, the layer will fit fully in the surface when
// its translated more than the perspective amount.
layer_to_surface_transform.MakeIdentity();
// The following sequence of transforms applies the perspective about the
// center of the surface.
layer_to_surface_transform.Translate(50.0, 50.0);
layer_to_surface_transform.ApplyPerspectiveDepth(9.0);
layer_to_surface_transform.Translate(-50.0, -50.0);
// This translate places the layer in front of the surface's projection plane.
layer_to_surface_transform.Translate3d(0.0, 0.0, -27.0);
gfx::Rect expected = gfx::Rect(-50, -50, 200, 200);
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
// Case 2: same projection as before, except that the layer is also translated
// to the side, so that only the right half of the layer should be visible.
//
// Explanation of expected result: The perspective ratio is (z distance
// between layer and camera origin) / (z distance between projection plane and
// camera origin) == ((-27 - 9) / 9) Then, by similar triangles, if we want to
// move a layer by translating -50 units in projected surface units (so that
// only half of it is visible), then we would need to translate by (-36 / 9) *
// -50 == -200 in the layer's units.
layer_to_surface_transform.Translate3d(-200.0, 0.0, 0.0);
expected = gfx::Rect(gfx::Point(50, -50),
gfx::Size(100, 200)); // The right half of the layer's
// bounding rect.
actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
}
TEST_F(LayerTreeHostCommonTest,
VisibleRectFor3dOrthographicIsNotClippedBehindSurface) {
// There is currently no explicit concept of an orthographic projection plane
// in our code (nor in the CSS spec to my knowledge). Therefore, layers that
// are technically behind the surface in an orthographic world should not be
// clipped when they are flattened to the surface.
gfx::Rect target_surface_rect = gfx::Rect(0, 0, 100, 100);
gfx::Rect layer_content_rect = gfx::Rect(0, 0, 100, 100);
gfx::Transform layer_to_surface_transform;
// This sequence of transforms effectively rotates the layer about the y-axis
// at the center of the layer.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.Translate(50.0, 0.0);
layer_to_surface_transform.RotateAboutYAxis(45.0);
layer_to_surface_transform.Translate(-50.0, 0.0);
gfx::Rect expected = gfx::Rect(0, 0, 100, 100);
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
}
TEST_F(LayerTreeHostCommonTest, VisibleRectFor3dPerspectiveWhenClippedByW) {
// Test the calculateVisibleRect() function works correctly when projecting a
// surface onto a layer, but the layer is partially behind the camera (not
// just behind the projection plane). In this case, the cartesian coordinates
// may seem to be valid, but actually they are not. The visible rect needs to
// be properly clipped by the w = 0 plane in homogeneous coordinates before
// converting to cartesian coordinates.
gfx::Rect target_surface_rect = gfx::Rect(-50, -50, 100, 100);
gfx::Rect layer_content_rect = gfx::Rect(-10, -1, 20, 2);
gfx::Transform layer_to_surface_transform;
// The layer is positioned so that the right half of the layer should be in
// front of the camera, while the other half is behind the surface's
// projection plane. The following sequence of transforms applies the
// perspective and rotation about the center of the layer.
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.ApplyPerspectiveDepth(1.0);
layer_to_surface_transform.Translate3d(-2.0, 0.0, 1.0);
layer_to_surface_transform.RotateAboutYAxis(45.0);
// Sanity check that this transform does indeed cause w < 0 when applying the
// transform, otherwise this code is not testing the intended scenario.
bool clipped;
MathUtil::MapQuad(layer_to_surface_transform,
gfx::QuadF(gfx::RectF(layer_content_rect)),
&clipped);
ASSERT_TRUE(clipped);
int expected_x_position = 0;
int expected_width = 10;
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_EQ(expected_x_position, actual.x());
EXPECT_EQ(expected_width, actual.width());
}
TEST_F(LayerTreeHostCommonTest, VisibleRectForPerspectiveUnprojection) {
// To determine visible rect in layer space, there needs to be an
// un-projection from surface space to layer space. When the original
// transform was a perspective projection that was clipped, it returns a rect
// that encloses the clipped bounds. Un-projecting this new rect may require
// clipping again.
// This sequence of transforms causes one corner of the layer to protrude
// across the w = 0 plane, and should be clipped.
gfx::Rect target_surface_rect = gfx::Rect(-50, -50, 100, 100);
gfx::Rect layer_content_rect = gfx::Rect(-10, -10, 20, 20);
gfx::Transform layer_to_surface_transform;
layer_to_surface_transform.MakeIdentity();
layer_to_surface_transform.ApplyPerspectiveDepth(1.0);
layer_to_surface_transform.Translate3d(0.0, 0.0, -5.0);
layer_to_surface_transform.RotateAboutYAxis(45.0);
layer_to_surface_transform.RotateAboutXAxis(80.0);
// Sanity check that un-projection does indeed cause w < 0, otherwise this
// code is not testing the intended scenario.
bool clipped;
gfx::RectF clipped_rect =
MathUtil::MapClippedRect(layer_to_surface_transform, layer_content_rect);
MathUtil::ProjectQuad(
Inverse(layer_to_surface_transform), gfx::QuadF(clipped_rect), &clipped);
ASSERT_TRUE(clipped);
// Only the corner of the layer is not visible on the surface because of being
// clipped. But, the net result of rounding visible region to an axis-aligned
// rect is that the entire layer should still be considered visible.
gfx::Rect expected = gfx::Rect(-10, -10, 20, 20);
gfx::Rect actual = LayerTreeHostCommon::CalculateVisibleRect(
target_surface_rect, layer_content_rect, layer_to_surface_transform);
EXPECT_RECT_EQ(expected, actual);
}
TEST_F(LayerTreeHostCommonTest, DrawableAndVisibleContentRectsForSimpleLayers) {
scoped_refptr<Layer> root = Layer::Create();
scoped_refptr<LayerWithForcedDrawsContent> child1 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> child2 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
scoped_refptr<LayerWithForcedDrawsContent> child3 =
make_scoped_refptr(new LayerWithForcedDrawsContent());
root->AddChild(child1);
root->AddChild(child2);
root->AddChild(child3);
scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
host->SetRootLayer(root);
gfx::Transform identity_matrix;
SetLayerPropertiesForTesting(root.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(100, 100),
true,
false);
SetLayerPropertiesForTesting(child1.get(),
identity_matrix,
gfx::Point3F(),
gfx::PointF(),
gfx::Size(50, 50),
true,
false);
SetLayerPropertiesForTesting(child2.get(),
identity_matrix,
gfx::Point3F(),