blob: 14e5aff9a6fa1f5c5311db9fddc6044f18923374 [file] [log] [blame]
// Copyright 2013 The Flutter 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 "flutter/flow/layers/transform_layer.h"
#include "flutter/flow/testing/diff_context_test.h"
#include "flutter/flow/testing/layer_test.h"
#include "flutter/flow/testing/mock_layer.h"
#include "flutter/fml/macros.h"
namespace flutter {
namespace testing {
using TransformLayerTest = LayerTest;
#ifndef NDEBUG
TEST_F(TransformLayerTest, PaintingEmptyLayerDies) {
auto layer = std::make_shared<TransformLayer>(SkMatrix()); // identity
layer->Preroll(preroll_context());
EXPECT_EQ(layer->paint_bounds(), SkRect::MakeEmpty());
EXPECT_EQ(layer->child_paint_bounds(), SkRect::MakeEmpty());
EXPECT_FALSE(layer->needs_painting(paint_context()));
EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
"needs_painting\\(context\\)");
}
TEST_F(TransformLayerTest, PaintBeforePrerollDies) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
auto mock_layer = std::make_shared<MockLayer>(child_path, DlPaint());
auto layer = std::make_shared<TransformLayer>(SkMatrix()); // identity
layer->Add(mock_layer);
EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
"needs_painting\\(context\\)");
}
#endif
TEST_F(TransformLayerTest, Identity) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
SkRect cull_rect = SkRect::MakeXYWH(2.0f, 2.0f, 14.0f, 14.0f);
auto mock_layer = std::make_shared<MockLayer>(child_path, DlPaint());
auto layer = std::make_shared<TransformLayer>(SkMatrix()); // identity
layer->Add(mock_layer);
preroll_context()->state_stack.set_preroll_delegate(cull_rect);
layer->Preroll(preroll_context());
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(), mock_layer->paint_bounds());
EXPECT_EQ(layer->child_paint_bounds(), mock_layer->paint_bounds());
EXPECT_TRUE(mock_layer->needs_painting(paint_context()));
EXPECT_TRUE(layer->needs_painting(paint_context()));
EXPECT_EQ(mock_layer->parent_matrix(), SkMatrix()); // identity
EXPECT_EQ(mock_layer->parent_cull_rect(), cull_rect);
EXPECT_EQ(mock_layer->parent_mutators().stack_count(), 0u);
EXPECT_EQ(mock_layer->parent_mutators(), MutatorsStack());
layer->Paint(display_list_paint_context());
DisplayListBuilder expected_builder;
/* (Transform)layer::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(SkMatrix());
/* mock_layer::Paint */ {
expected_builder.DrawPath(child_path, DlPaint());
}
}
expected_builder.Restore();
}
EXPECT_TRUE(DisplayListsEQ_Verbose(display_list(), expected_builder.Build()));
}
TEST_F(TransformLayerTest, Simple) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
SkRect local_cull_rect = SkRect::MakeXYWH(2.0f, 2.0f, 14.0f, 14.0f);
SkRect device_cull_rect = initial_transform.mapRect(local_cull_rect);
SkMatrix layer_transform = SkMatrix::Translate(2.5f, 2.5f);
SkMatrix inverse_layer_transform;
EXPECT_TRUE(layer_transform.invert(&inverse_layer_transform));
auto mock_layer = std::make_shared<MockLayer>(child_path, DlPaint());
auto layer = std::make_shared<TransformLayer>(layer_transform);
layer->Add(mock_layer);
preroll_context()->state_stack.set_preroll_delegate(device_cull_rect,
initial_transform);
layer->Preroll(preroll_context());
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(),
layer_transform.mapRect(mock_layer->paint_bounds()));
EXPECT_EQ(layer->child_paint_bounds(), mock_layer->paint_bounds());
EXPECT_TRUE(mock_layer->needs_painting(paint_context()));
EXPECT_TRUE(layer->needs_painting(paint_context()));
EXPECT_EQ(mock_layer->parent_matrix(),
SkMatrix::Concat(initial_transform, layer_transform));
EXPECT_EQ(mock_layer->parent_cull_rect(),
inverse_layer_transform.mapRect(local_cull_rect));
EXPECT_EQ(mock_layer->parent_mutators(),
std::vector({Mutator(layer_transform)}));
layer->Paint(display_list_paint_context());
DisplayListBuilder expected_builder;
/* (Transform)layer::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(layer_transform);
/* mock_layer::Paint */ {
expected_builder.DrawPath(child_path, DlPaint());
}
}
expected_builder.Restore();
}
EXPECT_TRUE(DisplayListsEQ_Verbose(display_list(), expected_builder.Build()));
}
TEST_F(TransformLayerTest, SimpleM44) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
SkRect local_cull_rect = SkRect::MakeXYWH(2.0f, 2.0f, 14.0f, 14.0f);
SkRect device_cull_rect = initial_transform.mapRect(local_cull_rect);
SkMatrix layer_transform = SkMatrix::Translate(2.5f, 3.5f);
SkMatrix inverse_layer_transform;
EXPECT_TRUE(layer_transform.invert(&inverse_layer_transform));
auto mock_layer = std::make_shared<MockLayer>(child_path, DlPaint());
auto layer = std::make_shared<TransformLayer>(SkM44::Translate(2.5f, 3.5f));
layer->Add(mock_layer);
preroll_context()->state_stack.set_preroll_delegate(device_cull_rect,
initial_transform);
layer->Preroll(preroll_context());
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(),
layer_transform.mapRect(mock_layer->paint_bounds()));
EXPECT_EQ(layer->child_paint_bounds(), mock_layer->paint_bounds());
EXPECT_TRUE(mock_layer->needs_painting(paint_context()));
EXPECT_TRUE(layer->needs_painting(paint_context()));
EXPECT_EQ(mock_layer->parent_matrix(),
SkMatrix::Concat(initial_transform, layer_transform));
EXPECT_EQ(mock_layer->parent_cull_rect(),
inverse_layer_transform.mapRect(local_cull_rect));
EXPECT_EQ(mock_layer->parent_mutators(),
std::vector({Mutator(layer_transform)}));
layer->Paint(display_list_paint_context());
DisplayListBuilder expected_builder;
/* (Transform)layer::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(layer_transform);
/* mock_layer::Paint */ {
expected_builder.DrawPath(child_path, DlPaint());
}
}
expected_builder.Restore();
}
EXPECT_TRUE(DisplayListsEQ_Verbose(display_list(), expected_builder.Build()));
}
TEST_F(TransformLayerTest, ComplexM44) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
SkRect local_cull_rect = SkRect::MakeXYWH(2.0f, 2.0f, 14.0f, 14.0f);
SkRect device_cull_rect = initial_transform.mapRect(local_cull_rect);
SkM44 layer_transform44 = SkM44();
layer_transform44.preTranslate(2.5f, 2.5f);
// 20 degrees around the X axis
layer_transform44.preConcat(SkM44::Rotate({1.0f, 0.0f, 0.0f}, M_PI / 9.0f));
// 10 degrees around the Y axis
layer_transform44.preConcat(SkM44::Rotate({0.0f, 1.0f, 0.0f}, M_PI / 18.0f));
SkMatrix layer_transform = layer_transform44.asM33();
SkMatrix inverse_layer_transform;
EXPECT_TRUE(layer_transform.invert(&inverse_layer_transform));
auto mock_layer = std::make_shared<MockLayer>(child_path, DlPaint());
auto layer = std::make_shared<TransformLayer>(layer_transform44);
layer->Add(mock_layer);
preroll_context()->state_stack.set_preroll_delegate(device_cull_rect,
initial_transform);
layer->Preroll(preroll_context());
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(),
layer_transform.mapRect(mock_layer->paint_bounds()));
EXPECT_EQ(layer->child_paint_bounds(), mock_layer->paint_bounds());
EXPECT_TRUE(mock_layer->needs_painting(paint_context()));
EXPECT_TRUE(layer->needs_painting(paint_context()));
EXPECT_EQ(mock_layer->parent_matrix(),
SkMatrix::Concat(initial_transform, layer_transform));
EXPECT_EQ(mock_layer->parent_cull_rect(),
inverse_layer_transform.mapRect(local_cull_rect));
EXPECT_EQ(mock_layer->parent_mutators(),
std::vector({Mutator(layer_transform)}));
layer->Paint(display_list_paint_context());
DisplayListBuilder expected_builder;
/* (Transform)layer::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(layer_transform44);
/* mock_layer::Paint */ {
expected_builder.DrawPath(child_path, DlPaint());
}
}
expected_builder.Restore();
}
EXPECT_TRUE(DisplayListsEQ_Verbose(display_list(), expected_builder.Build()));
}
TEST_F(TransformLayerTest, Nested) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
SkRect local_cull_rect = SkRect::MakeXYWH(2.0f, 2.0f, 14.0f, 14.0f);
SkRect device_cull_rect = initial_transform.mapRect(local_cull_rect);
SkMatrix layer1_transform = SkMatrix::Translate(2.5f, 2.5f);
SkMatrix layer2_transform = SkMatrix::Translate(3.5f, 3.5f);
SkMatrix inverse_layer1_transform, inverse_layer2_transform;
EXPECT_TRUE(layer1_transform.invert(&inverse_layer1_transform));
EXPECT_TRUE(layer2_transform.invert(&inverse_layer2_transform));
auto mock_layer = std::make_shared<MockLayer>(child_path, DlPaint());
auto layer1 = std::make_shared<TransformLayer>(layer1_transform);
auto layer2 = std::make_shared<TransformLayer>(layer2_transform);
layer1->Add(layer2);
layer2->Add(mock_layer);
preroll_context()->state_stack.set_preroll_delegate(device_cull_rect,
initial_transform);
layer1->Preroll(preroll_context());
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer2->paint_bounds(),
layer2_transform.mapRect(mock_layer->paint_bounds()));
EXPECT_EQ(layer2->child_paint_bounds(), mock_layer->paint_bounds());
EXPECT_EQ(layer1->paint_bounds(),
layer1_transform.mapRect(layer2->paint_bounds()));
EXPECT_EQ(layer1->child_paint_bounds(), layer2->paint_bounds());
EXPECT_TRUE(mock_layer->needs_painting(paint_context()));
EXPECT_TRUE(layer2->needs_painting(paint_context()));
EXPECT_TRUE(layer1->needs_painting(paint_context()));
EXPECT_EQ(
mock_layer->parent_matrix(),
SkMatrix::Concat(SkMatrix::Concat(initial_transform, layer1_transform),
layer2_transform));
EXPECT_EQ(mock_layer->parent_cull_rect(),
inverse_layer2_transform.mapRect(
inverse_layer1_transform.mapRect(local_cull_rect)));
EXPECT_EQ(
mock_layer->parent_mutators(),
std::vector({Mutator(layer1_transform), Mutator(layer2_transform)}));
layer1->Paint(display_list_paint_context());
DisplayListBuilder expected_builder;
/* (Transform)layer1::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(layer1_transform);
/* (Transform)layer1::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(layer2_transform);
/* mock_layer::Paint */ {
expected_builder.DrawPath(child_path, DlPaint());
}
}
expected_builder.Restore();
}
}
expected_builder.Restore();
}
EXPECT_TRUE(DisplayListsEQ_Verbose(display_list(), expected_builder.Build()));
}
TEST_F(TransformLayerTest, NestedSeparated) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
SkRect local_cull_rect = SkRect::MakeXYWH(2.0f, 2.0f, 14.0f, 14.0f);
SkRect device_cull_rect = initial_transform.mapRect(local_cull_rect);
SkMatrix layer1_transform = SkMatrix::Translate(2.5f, 2.5f);
SkMatrix layer2_transform = SkMatrix::Translate(3.5f, 3.5f);
SkMatrix inverse_layer1_transform, inverse_layer2_transform;
EXPECT_TRUE(layer1_transform.invert(&inverse_layer1_transform));
EXPECT_TRUE(layer2_transform.invert(&inverse_layer2_transform));
DlPaint child_paint1(DlColor::kBlue());
DlPaint child_paint2(DlColor::kGreen());
auto mock_layer1 = std::make_shared<MockLayer>(child_path, child_paint1);
auto mock_layer2 = std::make_shared<MockLayer>(child_path, child_paint2);
auto layer1 = std::make_shared<TransformLayer>(layer1_transform);
auto layer2 = std::make_shared<TransformLayer>(layer2_transform);
layer1->Add(mock_layer1);
layer1->Add(layer2);
layer2->Add(mock_layer2);
preroll_context()->state_stack.set_preroll_delegate(device_cull_rect,
initial_transform);
layer1->Preroll(preroll_context());
SkRect layer1_child_bounds = layer2->paint_bounds();
layer1_child_bounds.join(mock_layer1->paint_bounds());
SkRect expected_layer1_bounds = layer1_child_bounds;
layer1_transform.mapRect(&expected_layer1_bounds);
EXPECT_EQ(mock_layer2->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer2->paint_bounds(),
layer2_transform.mapRect(mock_layer2->paint_bounds()));
EXPECT_EQ(layer2->child_paint_bounds(), mock_layer2->paint_bounds());
EXPECT_EQ(mock_layer1->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer1->paint_bounds(), expected_layer1_bounds);
EXPECT_EQ(layer1->child_paint_bounds(), layer1_child_bounds);
EXPECT_TRUE(mock_layer2->needs_painting(paint_context()));
EXPECT_TRUE(layer2->needs_painting(paint_context()));
EXPECT_TRUE(mock_layer1->needs_painting(paint_context()));
EXPECT_TRUE(layer1->needs_painting(paint_context()));
EXPECT_EQ(mock_layer1->parent_matrix(),
SkMatrix::Concat(initial_transform, layer1_transform));
EXPECT_EQ(
mock_layer2->parent_matrix(),
SkMatrix::Concat(SkMatrix::Concat(initial_transform, layer1_transform),
layer2_transform));
EXPECT_EQ(mock_layer1->parent_cull_rect(),
inverse_layer1_transform.mapRect(local_cull_rect));
EXPECT_EQ(mock_layer2->parent_cull_rect(),
inverse_layer2_transform.mapRect(
inverse_layer1_transform.mapRect(local_cull_rect)));
EXPECT_EQ(mock_layer1->parent_mutators(),
std::vector({Mutator(layer1_transform)}));
EXPECT_EQ(
mock_layer2->parent_mutators(),
std::vector({Mutator(layer1_transform), Mutator(layer2_transform)}));
layer1->Paint(display_list_paint_context());
DisplayListBuilder expected_builder;
/* (Transform)layer1::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(layer1_transform);
/* mock_layer::Paint */ {
expected_builder.DrawPath(child_path, child_paint1);
}
/* (Transform)layer1::Paint */ {
expected_builder.Save();
{
expected_builder.Transform(layer2_transform);
/* mock_layer::Paint */ {
expected_builder.DrawPath(child_path, child_paint2);
}
}
expected_builder.Restore();
}
}
expected_builder.Restore();
}
EXPECT_TRUE(DisplayListsEQ_Verbose(display_list(), expected_builder.Build()));
}
TEST_F(TransformLayerTest, OpacityInheritance) {
auto path1 = SkPath().addRect({10, 10, 30, 30});
auto mock1 = MockLayer::MakeOpacityCompatible(path1);
auto transform1 = std::make_shared<TransformLayer>(SkMatrix::Scale(2, 2));
transform1->Add(mock1);
// TransformLayer will pass through compatibility from a compatible child
PrerollContext* context = preroll_context();
transform1->Preroll(context);
EXPECT_EQ(context->renderable_state_flags,
LayerStateStack::kCallerCanApplyOpacity);
auto path2 = SkPath().addRect({40, 40, 50, 50});
auto mock2 = MockLayer::MakeOpacityCompatible(path2);
transform1->Add(mock2);
// TransformLayer will pass through compatibility from multiple
// non-overlapping compatible children
transform1->Preroll(context);
EXPECT_EQ(context->renderable_state_flags,
LayerStateStack::kCallerCanApplyOpacity);
auto path3 = SkPath().addRect({20, 20, 40, 40});
auto mock3 = MockLayer::MakeOpacityCompatible(path3);
transform1->Add(mock3);
// TransformLayer will not pass through compatibility from multiple
// overlapping children even if they are individually compatible
transform1->Preroll(context);
EXPECT_EQ(context->renderable_state_flags, 0);
auto transform2 = std::make_shared<TransformLayer>(SkMatrix::Scale(2, 2));
transform2->Add(mock1);
transform2->Add(mock2);
// Double check first two children are compatible and non-overlapping
transform2->Preroll(context);
EXPECT_EQ(context->renderable_state_flags,
LayerStateStack::kCallerCanApplyOpacity);
auto path4 = SkPath().addRect({60, 60, 70, 70});
auto mock4 = MockLayer::Make(path4);
transform2->Add(mock4);
// The third child is non-overlapping, but not compatible so the
// TransformLayer should end up incompatible
transform2->Preroll(context);
EXPECT_EQ(context->renderable_state_flags, 0);
}
TEST_F(TransformLayerTest, OpacityInheritancePainting) {
auto path1 = SkPath().addRect({10, 10, 30, 30});
auto mock1 = MockLayer::MakeOpacityCompatible(path1);
auto path2 = SkPath().addRect({40, 40, 50, 50});
auto mock2 = MockLayer::MakeOpacityCompatible(path2);
auto transform = SkMatrix::Scale(2, 2);
auto transform_layer = std::make_shared<TransformLayer>(transform);
transform_layer->Add(mock1);
transform_layer->Add(mock2);
// TransformLayer will pass through compatibility from multiple
// non-overlapping compatible children
PrerollContext* context = preroll_context();
transform_layer->Preroll(context);
EXPECT_EQ(context->renderable_state_flags,
LayerStateStack::kCallerCanApplyOpacity);
int opacity_alpha = 0x7F;
SkPoint offset = SkPoint::Make(10, 10);
auto opacity_layer = std::make_shared<OpacityLayer>(opacity_alpha, offset);
opacity_layer->Add(transform_layer);
opacity_layer->Preroll(context);
EXPECT_TRUE(opacity_layer->children_can_accept_opacity());
DisplayListBuilder expected_builder;
/* opacity_layer paint */ {
expected_builder.Save();
{
expected_builder.Translate(offset.fX, offset.fY);
/* transform_layer paint */ {
expected_builder.Save();
expected_builder.Transform(transform);
/* child layer1 paint */ {
expected_builder.DrawPath(path1, DlPaint().setAlpha(opacity_alpha));
}
/* child layer2 paint */ {
expected_builder.DrawPath(path2, DlPaint().setAlpha(opacity_alpha));
}
expected_builder.Restore();
}
}
expected_builder.Restore();
}
opacity_layer->Paint(display_list_paint_context());
EXPECT_TRUE(DisplayListsEQ_Verbose(display_list(), expected_builder.Build()));
}
using TransformLayerLayerDiffTest = DiffContextTest;
TEST_F(TransformLayerLayerDiffTest, Transform) {
auto path1 = SkPath().addRect(SkRect::MakeLTRB(0, 0, 50, 50));
auto m1 = std::make_shared<MockLayer>(path1);
auto transform1 =
std::make_shared<TransformLayer>(SkMatrix::Translate(10, 10));
transform1->Add(m1);
MockLayerTree t1;
t1.root()->Add(transform1);
auto damage = DiffLayerTree(t1, MockLayerTree());
EXPECT_EQ(damage.frame_damage, SkIRect::MakeLTRB(10, 10, 60, 60));
auto transform2 =
std::make_shared<TransformLayer>(SkMatrix::Translate(20, 20));
transform2->Add(m1);
transform2->AssignOldLayer(transform1.get());
MockLayerTree t2;
t2.root()->Add(transform2);
damage = DiffLayerTree(t2, t1);
EXPECT_EQ(damage.frame_damage, SkIRect::MakeLTRB(10, 10, 70, 70));
auto transform3 =
std::make_shared<TransformLayer>(SkMatrix::Translate(20, 20));
transform3->Add(m1);
transform3->AssignOldLayer(transform2.get());
MockLayerTree t3;
t3.root()->Add(transform3);
damage = DiffLayerTree(t3, t2);
EXPECT_EQ(damage.frame_damage, SkIRect::MakeEmpty());
}
TEST_F(TransformLayerLayerDiffTest, TransformNested) {
auto path1 = SkPath().addRect(SkRect::MakeLTRB(0, 0, 50, 50));
auto m1 = CreateContainerLayer(std::make_shared<MockLayer>(path1));
auto m2 = CreateContainerLayer(std::make_shared<MockLayer>(path1));
auto m3 = CreateContainerLayer(std::make_shared<MockLayer>(path1));
auto transform1 = std::make_shared<TransformLayer>(SkMatrix::Scale(2.0, 2.0));
auto transform1_1 =
std::make_shared<TransformLayer>(SkMatrix::Translate(10, 10));
transform1_1->Add(m1);
transform1->Add(transform1_1);
auto transform1_2 =
std::make_shared<TransformLayer>(SkMatrix::Translate(100, 100));
transform1_2->Add(m2);
transform1->Add(transform1_2);
auto transform1_3 =
std::make_shared<TransformLayer>(SkMatrix::Translate(200, 200));
transform1_3->Add(m3);
transform1->Add(transform1_3);
MockLayerTree l1;
l1.root()->Add(transform1);
auto damage = DiffLayerTree(l1, MockLayerTree());
EXPECT_EQ(damage.frame_damage, SkIRect::MakeLTRB(20, 20, 500, 500));
auto transform2 = std::make_shared<TransformLayer>(SkMatrix::Scale(2.0, 2.0));
auto transform2_1 =
std::make_shared<TransformLayer>(SkMatrix::Translate(10, 10));
transform2_1->Add(m1);
transform2_1->AssignOldLayer(transform1_1.get());
transform2->Add(transform2_1);
// Offset 1px from transform1_2 so that they're not the same
auto transform2_2 =
std::make_shared<TransformLayer>(SkMatrix::Translate(100, 101));
transform2_2->Add(m2);
transform2_2->AssignOldLayer(transform1_2.get());
transform2->Add(transform2_2);
auto transform2_3 =
std::make_shared<TransformLayer>(SkMatrix::Translate(200, 200));
transform2_3->Add(m3);
transform2_3->AssignOldLayer(transform1_3.get());
transform2->Add(transform2_3);
MockLayerTree l2;
l2.root()->Add(transform2);
damage = DiffLayerTree(l2, l1);
// transform2 has not transform1 assigned as old layer, so it should be
// invalidated completely
EXPECT_EQ(damage.frame_damage, SkIRect::MakeLTRB(20, 20, 500, 500));
// now diff the tree properly, the only difference being transform2_2 and
// transform_2_1
transform2->AssignOldLayer(transform1.get());
damage = DiffLayerTree(l2, l1);
EXPECT_EQ(damage.frame_damage, SkIRect::MakeLTRB(200, 200, 300, 302));
}
} // namespace testing
} // namespace flutter