| // Copyright 2013 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/layers/layer_position_constraint.h" |
| |
| #include <vector> |
| |
| #include "cc/layers/layer_impl.h" |
| #include "cc/test/fake_impl_proxy.h" |
| #include "cc/test/fake_layer_tree_host_impl.h" |
| #include "cc/test/geometry_test_utils.h" |
| #include "cc/trees/layer_tree_host_common.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace cc { |
| namespace { |
| |
| void SetLayerPropertiesForTesting(LayerImpl* layer, |
| const gfx::Transform& transform, |
| const gfx::Transform& sublayer_transform, |
| gfx::PointF anchor, |
| gfx::PointF position, |
| gfx::Size bounds, |
| bool preserves3d) { |
| layer->SetTransform(transform); |
| layer->SetSublayerTransform(sublayer_transform); |
| layer->SetAnchorPoint(anchor); |
| layer->SetPosition(position); |
| layer->SetBounds(bounds); |
| layer->SetPreserves3d(preserves3d); |
| layer->SetContentBounds(bounds); |
| } |
| |
| 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; |
| std::vector<LayerImpl*> 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; |
| LayerTreeHostCommon::CalculateDrawProperties(&inputs); |
| } |
| |
| void ExecuteCalculateDrawProperties(LayerImpl* root_layer) { |
| LayerImpl* page_scale_application_layer = NULL; |
| ExecuteCalculateDrawProperties( |
| root_layer, 1.f, 1.f, page_scale_application_layer, false); |
| } |
| |
| class LayerPositionConstraintTest : public testing::Test { |
| public: |
| LayerPositionConstraintTest() |
| : host_impl_(&proxy_) { |
| root_ = CreateTreeForTest(); |
| fixed_to_top_left_.set_is_fixed_position(true); |
| fixed_to_bottom_right_.set_is_fixed_position(true); |
| fixed_to_bottom_right_.set_is_fixed_to_right_edge(true); |
| fixed_to_bottom_right_.set_is_fixed_to_bottom_edge(true); |
| } |
| |
| scoped_ptr<LayerImpl> CreateTreeForTest() { |
| scoped_ptr<LayerImpl> root = |
| LayerImpl::Create(host_impl_.active_tree(), 1); |
| scoped_ptr<LayerImpl> child = |
| LayerImpl::Create(host_impl_.active_tree(), 2); |
| scoped_ptr<LayerImpl> grand_child = |
| LayerImpl::Create(host_impl_.active_tree(), 3); |
| scoped_ptr<LayerImpl> great_grand_child = |
| LayerImpl::Create(host_impl_.active_tree(), 4); |
| |
| gfx::Transform IdentityMatrix; |
| gfx::PointF anchor; |
| gfx::PointF position; |
| gfx::Size bounds(100, 100); |
| SetLayerPropertiesForTesting(root.get(), |
| IdentityMatrix, |
| IdentityMatrix, |
| anchor, |
| position, |
| bounds, |
| false); |
| SetLayerPropertiesForTesting(child.get(), |
| IdentityMatrix, |
| IdentityMatrix, |
| anchor, |
| position, |
| bounds, |
| false); |
| SetLayerPropertiesForTesting(grand_child.get(), |
| IdentityMatrix, |
| IdentityMatrix, |
| anchor, |
| position, |
| bounds, |
| false); |
| SetLayerPropertiesForTesting(great_grand_child.get(), |
| IdentityMatrix, |
| IdentityMatrix, |
| anchor, |
| position, |
| bounds, |
| false); |
| |
| root->SetMaxScrollOffset(gfx::Vector2d(100, 100)); |
| root->SetScrollable(true); |
| child->SetMaxScrollOffset(gfx::Vector2d(100, 100)); |
| child->SetScrollable(true); |
| grand_child->SetMaxScrollOffset(gfx::Vector2d(100, 100)); |
| grand_child->SetScrollable(true); |
| |
| grand_child->AddChild(great_grand_child.Pass()); |
| child->AddChild(grand_child.Pass()); |
| root->AddChild(child.Pass()); |
| |
| return root.Pass(); |
| } |
| |
| protected: |
| FakeImplProxy proxy_; |
| FakeLayerTreeHostImpl host_impl_; |
| scoped_ptr<LayerImpl> root_; |
| |
| LayerPositionConstraint fixed_to_top_left_; |
| LayerPositionConstraint fixed_to_bottom_right_; |
| }; |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerWithDirectContainer) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container is the direct parent of the fixed-position layer. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| grand_child->SetPositionConstraint(fixed_to_top_left_); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| gfx::Transform expected_grand_child_transform = expected_child_transform; |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 10 |
| child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Here the child is affected by scroll delta, but the fixed position |
| // grand_child should not be affected. |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, -10.0); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_grand_child_transform.MakeIdentity(); |
| // Apply size delta from the child(container) layer. |
| expected_grand_child_transform.Translate(20.0, 20.0); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerWithTransformedDirectContainer) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container is the direct parent of the fixed-position layer, but that |
| // container is transformed. In this case, the fixed position element |
| // inherits the container's transform, but the scroll delta that has to be |
| // undone should not be affected by that transform. |
| // |
| // Transforms are in general non-commutative; using something like a |
| // non-uniform scale helps to verify that translations and non-uniform scales |
| // are applied in the correct order. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| |
| // This scale will cause child and grand_child to be effectively 200 x 800 |
| // with respect to the render target. |
| gfx::Transform non_uniform_scale; |
| non_uniform_scale.Scale(2.0, 8.0); |
| child->SetTransform(non_uniform_scale); |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| grand_child->SetPositionConstraint(fixed_to_top_left_); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| expected_child_transform.PreconcatTransform(non_uniform_scale); |
| |
| gfx::Transform expected_grand_child_transform = expected_child_transform; |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 20 |
| child->SetScrollDelta(gfx::Vector2d(10, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // The child should be affected by scroll delta, but the fixed position |
| // grand_child should not be affected. |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, -20.0); // scroll delta |
| expected_child_transform.PreconcatTransform(non_uniform_scale); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_grand_child_transform.MakeIdentity(); |
| // Apply child layer transform. |
| expected_grand_child_transform.PreconcatTransform(non_uniform_scale); |
| // Apply size delta from the child(container) layer. |
| expected_grand_child_transform.Translate(20.0, 20.0); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerWithDistantContainer) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container is NOT the direct parent of the fixed-position layer. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| LayerImpl* great_grand_child = grand_child->children()[0]; |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| gfx::Transform expected_grand_child_transform; |
| expected_grand_child_transform.Translate(8.0, 6.0); |
| |
| gfx::Transform expected_great_grand_child_transform = |
| expected_grand_child_transform; |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 10 |
| child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Here the child and grand_child are affected by scroll delta, but the fixed |
| // position great_grand_child should not be affected. |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, -10.0); |
| expected_grand_child_transform.MakeIdentity(); |
| expected_grand_child_transform.Translate(-2.0, -4.0); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_great_grand_child_transform.MakeIdentity(); |
| // Apply size delta from the child(container) layer. |
| expected_great_grand_child_transform.Translate(20.0, 20.0); |
| // Apply layer position from the grand child layer. |
| expected_great_grand_child_transform.Translate(8.0, 6.0); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerWithDistantContainerAndTransforms) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container is NOT the direct parent of the fixed-position layer, and the |
| // hierarchy has various transforms that have to be processed in the correct |
| // order. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| LayerImpl* great_grand_child = grand_child->children()[0]; |
| |
| gfx::Transform rotation_about_z; |
| rotation_about_z.RotateAboutZAxis(90.0); |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| child->SetTransform(rotation_about_z); |
| grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| grand_child->SetTransform(rotation_about_z); |
| // great_grand_child is positioned upside-down with respect to the render |
| // target. |
| great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| expected_child_transform.PreconcatTransform(rotation_about_z); |
| |
| gfx::Transform expected_grand_child_transform; |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // child's local transform is inherited |
| // translation because of position occurs before layer's local transform. |
| expected_grand_child_transform.Translate(8.0, 6.0); |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // grand_child's local transform |
| |
| gfx::Transform expected_great_grand_child_transform = |
| expected_grand_child_transform; |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 20 |
| child->SetScrollDelta(gfx::Vector2d(10, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Here the child and grand_child are affected by scroll delta, but the fixed |
| // position great_grand_child should not be affected. |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, -20.0); // scroll delta |
| expected_child_transform.PreconcatTransform(rotation_about_z); |
| |
| expected_grand_child_transform.MakeIdentity(); |
| expected_grand_child_transform.Translate( |
| -10.0, -20.0); // child's scroll delta is inherited |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // child's local transform is inherited |
| // translation because of position occurs before layer's local transform. |
| expected_grand_child_transform.Translate(8.0, 6.0); |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // grand_child's local transform |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_great_grand_child_transform.MakeIdentity(); |
| // Apply child layer transform. |
| expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| // Apply size delta from the child(container) layer. |
| expected_great_grand_child_transform.Translate(20.0, 20.0); |
| // Apply layer position from the grand child layer. |
| expected_great_grand_child_transform.Translate(8.0, 6.0); |
| // Apply grand child layer transform. |
| expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerWithMultipleScrollDeltas) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container has multiple ancestors that have nonzero scroll delta before |
| // reaching the space where the layer is fixed. In this test, each scroll |
| // delta occurs in a different space because of each layer's local transform. |
| // This test checks for correct scroll compensation when the fixed-position |
| // container is NOT the direct parent of the fixed-position layer, and the |
| // hierarchy has various transforms that have to be processed in the correct |
| // order. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| LayerImpl* great_grand_child = grand_child->children()[0]; |
| |
| gfx::Transform rotation_about_z; |
| rotation_about_z.RotateAboutZAxis(90.0); |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| child->SetTransform(rotation_about_z); |
| grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| grand_child->SetTransform(rotation_about_z); |
| // great_grand_child is positioned upside-down with respect to the render |
| // target. |
| great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| expected_child_transform.PreconcatTransform(rotation_about_z); |
| |
| gfx::Transform expected_grand_child_transform; |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // child's local transform is inherited |
| // translation because of position occurs before layer's local transform. |
| expected_grand_child_transform.Translate(8.0, 6.0); |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // grand_child's local transform |
| |
| gfx::Transform expected_great_grand_child_transform = |
| expected_grand_child_transform; |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 20 |
| child->SetScrollDelta(gfx::Vector2d(10, 0)); |
| grand_child->SetScrollDelta(gfx::Vector2d(5, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Here the child and grand_child are affected by scroll delta, but the fixed |
| // position great_grand_child should not be affected. |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, 0.0); // scroll delta |
| expected_child_transform.PreconcatTransform(rotation_about_z); |
| |
| expected_grand_child_transform.MakeIdentity(); |
| expected_grand_child_transform.Translate( |
| -10.0, 0.0); // child's scroll delta is inherited |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // child's local transform is inherited |
| expected_grand_child_transform.Translate(-5.0, |
| 0.0); // grand_child's scroll delta |
| // translation because of position occurs before layer's local transform. |
| expected_grand_child_transform.Translate(8.0, 6.0); |
| expected_grand_child_transform.PreconcatTransform( |
| rotation_about_z); // grand_child's local transform |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_great_grand_child_transform.MakeIdentity(); |
| // Apply child layer transform. |
| expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| // Apply size delta from the child(container) layer. |
| expected_great_grand_child_transform.Translate(20.0, 20.0); |
| // Apply layer position from the grand child layer. |
| expected_great_grand_child_transform.Translate(8.0, 6.0); |
| // Apply grand child layer transform. |
| expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionWithIntermediateSurfaceAndTransforms) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container contributes to a different render surface than the fixed-position |
| // layer. In this case, the surface draw transforms also have to be accounted |
| // for when checking the scroll delta. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| LayerImpl* great_grand_child = grand_child->children()[0]; |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| grand_child->SetForceRenderSurface(true); |
| great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| great_grand_child->SetDrawsContent(true); |
| |
| gfx::Transform rotation_about_z; |
| rotation_about_z.RotateAboutZAxis(90.0); |
| grand_child->SetTransform(rotation_about_z); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| gfx::Transform expected_surface_draw_transform; |
| expected_surface_draw_transform.Translate(8.0, 6.0); |
| expected_surface_draw_transform.PreconcatTransform(rotation_about_z); |
| gfx::Transform expected_grand_child_transform; |
| gfx::Transform expected_great_grand_child_transform; |
| ASSERT_TRUE(grand_child->render_surface()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ( |
| expected_surface_draw_transform, |
| grand_child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 30 |
| child->SetScrollDelta(gfx::Vector2d(10, 30)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Here the grand_child remains unchanged, because it scrolls along with the |
| // render surface, and the translation is actually in the render surface. But, |
| // the fixed position great_grand_child is more awkward: its actually being |
| // drawn with respect to the render surface, but it needs to remain fixed with |
| // resepct to a container beyond that surface. So, the net result is that, |
| // unlike previous tests where the fixed position layer's transform remains |
| // unchanged, here the fixed position layer's transform explicitly contains |
| // the translation that cancels out the scroll. |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, -30.0); // scroll delta |
| |
| expected_surface_draw_transform.MakeIdentity(); |
| expected_surface_draw_transform.Translate(-10.0, -30.0); // scroll delta |
| expected_surface_draw_transform.Translate(8.0, 6.0); |
| expected_surface_draw_transform.PreconcatTransform(rotation_about_z); |
| |
| // The rotation and its inverse are needed to place the scroll delta |
| // compensation in the correct space. This test will fail if the |
| // rotation/inverse are backwards, too, so it requires perfect order of |
| // operations. |
| expected_great_grand_child_transform.MakeIdentity(); |
| expected_great_grand_child_transform.PreconcatTransform( |
| Inverse(rotation_about_z)); |
| // explicit canceling out the scroll delta that gets embedded in the fixed |
| // position layer's surface. |
| expected_great_grand_child_transform.Translate(10.0, 30.0); |
| expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| |
| ASSERT_TRUE(grand_child->render_surface()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ( |
| expected_surface_draw_transform, |
| grand_child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_great_grand_child_transform.MakeIdentity(); |
| // The rotation and its inverse are needed to place the scroll delta |
| // compensation in the correct space. This test will fail if the |
| // rotation/inverse are backwards, too, so it requires perfect order of |
| // operations. |
| expected_great_grand_child_transform.PreconcatTransform( |
| Inverse(rotation_about_z)); |
| // explicit canceling out the scroll delta that gets embedded in the fixed |
| // position layer's surface. |
| expected_great_grand_child_transform.Translate(10.0, 30.0); |
| // Also apply size delta in the child(container) layer space. |
| expected_great_grand_child_transform.Translate(20.0, 20.0); |
| expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerWithMultipleIntermediateSurfaces) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container contributes to a different render surface than the fixed-position |
| // layer, with additional render surfaces in-between. This checks that the |
| // conversion to ancestor surfaces is accumulated properly in the final matrix |
| // transform. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| LayerImpl* great_grand_child = grand_child->children()[0]; |
| |
| // Add one more layer to the test tree for this scenario. |
| { |
| gfx::Transform identity; |
| scoped_ptr<LayerImpl> fixed_position_child = |
| LayerImpl::Create(host_impl_.active_tree(), 5); |
| SetLayerPropertiesForTesting(fixed_position_child.get(), |
| identity, |
| identity, |
| gfx::PointF(), |
| gfx::PointF(), |
| gfx::Size(100, 100), |
| false); |
| great_grand_child->AddChild(fixed_position_child.Pass()); |
| } |
| LayerImpl* fixed_position_child = great_grand_child->children()[0]; |
| |
| // Actually set up the scenario here. |
| child->SetIsContainerForFixedPositionLayers(true); |
| grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| grand_child->SetForceRenderSurface(true); |
| great_grand_child->SetPosition(gfx::PointF(40.f, 60.f)); |
| great_grand_child->SetForceRenderSurface(true); |
| fixed_position_child->SetPositionConstraint(fixed_to_top_left_); |
| fixed_position_child->SetDrawsContent(true); |
| |
| // The additional rotations, which are non-commutative with translations, help |
| // to verify that we have correct order-of-operations in the final scroll |
| // compensation. Note that rotating about the center of the layer ensures we |
| // do not accidentally clip away layers that we want to test. |
| gfx::Transform rotation_about_z; |
| rotation_about_z.Translate(50.0, 50.0); |
| rotation_about_z.RotateAboutZAxis(90.0); |
| rotation_about_z.Translate(-50.0, -50.0); |
| grand_child->SetTransform(rotation_about_z); |
| great_grand_child->SetTransform(rotation_about_z); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| |
| gfx::Transform expected_grand_child_surface_draw_transform; |
| expected_grand_child_surface_draw_transform.Translate(8.0, 6.0); |
| expected_grand_child_surface_draw_transform.PreconcatTransform( |
| rotation_about_z); |
| |
| gfx::Transform expected_grand_child_transform; |
| |
| gfx::Transform expected_great_grand_child_surface_draw_transform; |
| expected_great_grand_child_surface_draw_transform.Translate(40.0, 60.0); |
| expected_great_grand_child_surface_draw_transform.PreconcatTransform( |
| rotation_about_z); |
| |
| gfx::Transform expected_great_grand_child_transform; |
| |
| gfx::Transform expected_fixed_position_child_transform; |
| |
| ASSERT_TRUE(grand_child->render_surface()); |
| ASSERT_TRUE(great_grand_child->render_surface()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ( |
| expected_grand_child_surface_draw_transform, |
| grand_child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ( |
| expected_great_grand_child_surface_draw_transform, |
| great_grand_child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| fixed_position_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 30 |
| child->SetScrollDelta(gfx::Vector2d(10, 30)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, -30.0); // scroll delta |
| |
| expected_grand_child_surface_draw_transform.MakeIdentity(); |
| expected_grand_child_surface_draw_transform.Translate(-10.0, |
| -30.0); // scroll delta |
| expected_grand_child_surface_draw_transform.Translate(8.0, 6.0); |
| expected_grand_child_surface_draw_transform.PreconcatTransform( |
| rotation_about_z); |
| |
| // grand_child, great_grand_child, and great_grand_child's surface are not |
| // expected to change, since they are all not fixed, and they are all drawn |
| // with respect to grand_child's surface that already has the scroll delta |
| // accounted for. |
| |
| // But the great-great grandchild, "fixed_position_child", should have a |
| // transform that explicitly cancels out the scroll delta. The expected |
| // transform is: compound_draw_transform.Inverse() * translate(positive scroll |
| // delta) * compound_origin_transform from great_grand_childSurface's origin |
| // to the root surface. |
| gfx::Transform compound_draw_transform; |
| compound_draw_transform.Translate(8.0, |
| 6.0); // origin translation of grand_child |
| compound_draw_transform.PreconcatTransform( |
| rotation_about_z); // rotation of grand_child |
| compound_draw_transform.Translate( |
| 40.0, 60.0); // origin translation of great_grand_child |
| compound_draw_transform.PreconcatTransform( |
| rotation_about_z); // rotation of great_grand_child |
| |
| expected_fixed_position_child_transform.MakeIdentity(); |
| expected_fixed_position_child_transform.PreconcatTransform( |
| Inverse(compound_draw_transform)); |
| // explicit canceling out the scroll delta that gets embedded in the fixed |
| // position layer's surface. |
| expected_fixed_position_child_transform.Translate(10.0, 30.0); |
| expected_fixed_position_child_transform.PreconcatTransform( |
| compound_draw_transform); |
| |
| ASSERT_TRUE(grand_child->render_surface()); |
| ASSERT_TRUE(great_grand_child->render_surface()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ( |
| expected_grand_child_surface_draw_transform, |
| grand_child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ( |
| expected_great_grand_child_surface_draw_transform, |
| great_grand_child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| fixed_position_child->draw_transform()); |
| |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| fixed_position_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| fixed_position_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_fixed_position_child_transform.MakeIdentity(); |
| expected_fixed_position_child_transform.PreconcatTransform( |
| Inverse(compound_draw_transform)); |
| // explicit canceling out the scroll delta that gets embedded in the fixed |
| // position layer's surface. |
| expected_fixed_position_child_transform.Translate(10.0, 30.0); |
| // Also apply size delta in the child(container) layer space. |
| expected_fixed_position_child_transform.Translate(20.0, 20.0); |
| expected_fixed_position_child_transform.PreconcatTransform( |
| compound_draw_transform); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| great_grand_child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| fixed_position_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerWithContainerLayerThatHasSurface) { |
| // This test checks for correct scroll compensation when the fixed-position |
| // container itself has a render surface. In this case, the container layer |
| // should be treated like a layer that contributes to a render target, and |
| // that render target is completely irrelevant; it should not affect the |
| // scroll compensation. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| child->SetForceRenderSurface(true); |
| grand_child->SetPositionConstraint(fixed_to_top_left_); |
| grand_child->SetDrawsContent(true); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_surface_draw_transform; |
| expected_surface_draw_transform.Translate(0.0, 0.0); |
| gfx::Transform expected_child_transform; |
| gfx::Transform expected_grand_child_transform; |
| ASSERT_TRUE(child->render_surface()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_surface_draw_transform, |
| child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 10 |
| child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // The surface is translated by scroll delta, the child transform doesn't |
| // change because it scrolls along with the surface, but the fixed position |
| // grand_child needs to compensate for the scroll translation. |
| expected_surface_draw_transform.MakeIdentity(); |
| expected_surface_draw_transform.Translate(-10.0, -10.0); |
| expected_grand_child_transform.MakeIdentity(); |
| expected_grand_child_transform.Translate(10.0, 10.0); |
| |
| ASSERT_TRUE(child->render_surface()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_surface_draw_transform, |
| child->render_surface()->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_grand_child_transform.MakeIdentity(); |
| // The surface is translated by scroll delta, the child transform doesn't |
| // change because it scrolls along with the surface, but the fixed position |
| // grand_child needs to compensate for the scroll translation. |
| expected_grand_child_transform.Translate(10.0, 10.0); |
| // Apply size delta from the child(container) layer. |
| expected_grand_child_transform.Translate(20.0, 20.0); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerThatIsAlsoFixedPositionContainer) { |
| // This test checks the scenario where a fixed-position layer also happens to |
| // be a container itself for a descendant fixed position layer. In particular, |
| // the layer should not accidentally be fixed to itself. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| |
| child->SetIsContainerForFixedPositionLayers(true); |
| grand_child->SetPositionConstraint(fixed_to_top_left_); |
| |
| // This should not confuse the grand_child. If correct, the grand_child would |
| // still be considered fixed to its container (i.e. "child"). |
| grand_child->SetIsContainerForFixedPositionLayers(true); |
| |
| // Case 1: scroll delta of 0, 0 |
| child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| gfx::Transform expected_grand_child_transform; |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 2: scroll delta of 10, 10 |
| child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Here the child is affected by scroll delta, but the fixed position |
| // grand_child should not be affected. |
| expected_child_transform.MakeIdentity(); |
| expected_child_transform.Translate(-10.0, -10.0); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Bottom-right fixed-position layer moves as container resizes. |
| expected_grand_child_transform.MakeIdentity(); |
| // Apply size delta from the child(container) layer. |
| expected_grand_child_transform.Translate(20.0, 20.0); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| } |
| |
| TEST_F(LayerPositionConstraintTest, |
| ScrollCompensationForFixedPositionLayerThatHasNoContainer) { |
| // This test checks scroll compensation when a fixed-position layer does not |
| // find any ancestor that is a "containerForFixedPositionLayers". In this |
| // situation, the layer should be fixed to the root layer. |
| LayerImpl* child = root_->children()[0]; |
| LayerImpl* grand_child = child->children()[0]; |
| |
| gfx::Transform rotation_by_z; |
| rotation_by_z.RotateAboutZAxis(90.0); |
| |
| root_->SetTransform(rotation_by_z); |
| grand_child->SetPositionConstraint(fixed_to_top_left_); |
| |
| // Case 1: root scroll delta of 0, 0 |
| root_->SetScrollDelta(gfx::Vector2d(0, 0)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform identity_matrix; |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(rotation_by_z, child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(rotation_by_z, |
| grand_child->draw_transform()); |
| |
| // Case 2: root scroll delta of 10, 10 |
| root_->SetScrollDelta(gfx::Vector2d(10, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_child_transform; |
| expected_child_transform.Translate(-10.0, -20.0); |
| expected_child_transform.PreconcatTransform(rotation_by_z); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(rotation_by_z, |
| grand_child->draw_transform()); |
| |
| // Case 3: fixed-container size delta of 20, 20 |
| root_->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| // Top-left fixed-position layer should not be affected by container size. |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(rotation_by_z, |
| grand_child->draw_transform()); |
| |
| // Case 4: Bottom-right fixed-position layer. |
| grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| ExecuteCalculateDrawProperties(root_.get()); |
| |
| gfx::Transform expected_grand_child_transform; |
| expected_grand_child_transform.Translate(-20.0, 20.0); |
| expected_grand_child_transform.PreconcatTransform(rotation_by_z); |
| |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| child->draw_transform()); |
| EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| grand_child->draw_transform()); |
| } |
| |
| } // namespace |
| } // namespace cc |
