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flutter_flutter/flow/layers/transform_layer_unittests.cc

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// 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/layer_test.h"
#include "flutter/flow/testing/mock_layer.h"
#include "flutter/fml/macros.h"
#include "flutter/testing/mock_canvas.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(), SkMatrix());
EXPECT_EQ(layer->paint_bounds(), SkRect::MakeEmpty());
EXPECT_FALSE(layer->needs_painting());
EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
"needs_painting\\(\\)");
}
TEST_F(TransformLayerTest, PaintBeforePreollDies) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
auto mock_layer = std::make_shared<MockLayer>(child_path, SkPaint());
auto layer = std::make_shared<TransformLayer>(SkMatrix()); // identity
layer->Add(mock_layer);
EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
"needs_painting\\(\\)");
}
#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, SkPaint());
auto layer = std::make_shared<TransformLayer>(SkMatrix()); // identity
layer->Add(mock_layer);
preroll_context()->cull_rect = cull_rect;
layer->Preroll(preroll_context(), SkMatrix());
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(), mock_layer->paint_bounds());
EXPECT_TRUE(mock_layer->needs_painting());
EXPECT_TRUE(layer->needs_painting());
EXPECT_EQ(mock_layer->parent_matrix(), SkMatrix()); // identity
EXPECT_EQ(mock_layer->parent_cull_rect(), cull_rect);
EXPECT_EQ(mock_layer->parent_mutators(), std::vector({Mutator(SkMatrix())}));
layer->Paint(paint_context());
EXPECT_EQ(mock_canvas().draw_calls(),
std::vector({MockCanvas::DrawCall{
0, MockCanvas::DrawPathData{child_path, SkPaint()}}}));
}
TEST_F(TransformLayerTest, Simple) {
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);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
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, SkPaint());
auto layer = std::make_shared<TransformLayer>(layer_transform);
layer->Add(mock_layer);
preroll_context()->cull_rect = cull_rect;
layer->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(),
layer_transform.mapRect(mock_layer->paint_bounds()));
EXPECT_TRUE(mock_layer->needs_painting());
EXPECT_TRUE(layer->needs_painting());
EXPECT_EQ(mock_layer->parent_matrix(),
SkMatrix::Concat(initial_transform, layer_transform));
EXPECT_EQ(mock_layer->parent_cull_rect(),
inverse_layer_transform.mapRect(cull_rect));
EXPECT_EQ(mock_layer->parent_mutators(),
std::vector({Mutator(layer_transform)}));
layer->Paint(paint_context());
EXPECT_EQ(
mock_canvas().draw_calls(),
std::vector({MockCanvas::DrawCall{0, MockCanvas::SaveData{1}},
MockCanvas::DrawCall{
1, MockCanvas::ConcatMatrixData{layer_transform}},
MockCanvas::DrawCall{
1, MockCanvas::DrawPathData{child_path, SkPaint()}},
MockCanvas::DrawCall{1, MockCanvas::RestoreData{0}}}));
}
TEST_F(TransformLayerTest, Nested) {
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);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
SkMatrix layer1_transform = SkMatrix::Translate(2.5f, 2.5f);
SkMatrix layer2_transform = SkMatrix::Translate(2.5f, 2.5f);
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, SkPaint());
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()->cull_rect = cull_rect;
layer1->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer2->paint_bounds(),
layer2_transform.mapRect(mock_layer->paint_bounds()));
EXPECT_EQ(layer1->paint_bounds(),
layer1_transform.mapRect(layer2->paint_bounds()));
EXPECT_TRUE(mock_layer->needs_painting());
EXPECT_TRUE(layer2->needs_painting());
EXPECT_TRUE(layer1->needs_painting());
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(cull_rect)));
EXPECT_EQ(
mock_layer->parent_mutators(),
std::vector({Mutator(layer2_transform), Mutator(layer1_transform)}));
layer1->Paint(paint_context());
EXPECT_EQ(
mock_canvas().draw_calls(),
std::vector({MockCanvas::DrawCall{0, MockCanvas::SaveData{1}},
MockCanvas::DrawCall{
1, MockCanvas::ConcatMatrixData{layer1_transform}},
MockCanvas::DrawCall{1, MockCanvas::SaveData{2}},
MockCanvas::DrawCall{
2, MockCanvas::ConcatMatrixData{layer2_transform}},
MockCanvas::DrawCall{
2, MockCanvas::DrawPathData{child_path, SkPaint()}},
MockCanvas::DrawCall{2, MockCanvas::RestoreData{1}},
MockCanvas::DrawCall{1, MockCanvas::RestoreData{0}}}));
}
TEST_F(TransformLayerTest, NestedSeparated) {
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);
SkMatrix initial_transform = SkMatrix::Translate(-0.5f, -0.5f);
SkMatrix layer1_transform = SkMatrix::Translate(2.5f, 2.5f);
SkMatrix layer2_transform = SkMatrix::Translate(2.5f, 2.5f);
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_layer1 =
std::make_shared<MockLayer>(child_path, SkPaint(SkColors::kBlue));
auto mock_layer2 =
std::make_shared<MockLayer>(child_path, SkPaint(SkColors::kGreen));
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()->cull_rect = cull_rect;
layer1->Preroll(preroll_context(), initial_transform);
SkRect expected_layer1_bounds = layer2->paint_bounds();
expected_layer1_bounds.join(mock_layer1->paint_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(mock_layer1->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer1->paint_bounds(), expected_layer1_bounds);
EXPECT_TRUE(mock_layer2->needs_painting());
EXPECT_TRUE(layer2->needs_painting());
EXPECT_TRUE(mock_layer1->needs_painting());
EXPECT_TRUE(layer1->needs_painting());
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(cull_rect));
EXPECT_EQ(mock_layer2->parent_cull_rect(),
inverse_layer2_transform.mapRect(
inverse_layer1_transform.mapRect(cull_rect)));
EXPECT_EQ(mock_layer1->parent_mutators(),
std::vector({Mutator(layer1_transform)}));
EXPECT_EQ(
mock_layer2->parent_mutators(),
std::vector({Mutator(layer2_transform), Mutator(layer1_transform)}));
layer1->Paint(paint_context());
EXPECT_EQ(
mock_canvas().draw_calls(),
std::vector({MockCanvas::DrawCall{0, MockCanvas::SaveData{1}},
MockCanvas::DrawCall{
1, MockCanvas::ConcatMatrixData{layer1_transform}},
MockCanvas::DrawCall{
1, MockCanvas::DrawPathData{child_path,
SkPaint(SkColors::kBlue)}},
MockCanvas::DrawCall{1, MockCanvas::SaveData{2}},
MockCanvas::DrawCall{
2, MockCanvas::ConcatMatrixData{layer2_transform}},
MockCanvas::DrawCall{
2, MockCanvas::DrawPathData{child_path,
SkPaint(SkColors::kGreen)}},
MockCanvas::DrawCall{2, MockCanvas::RestoreData{1}},
MockCanvas::DrawCall{1, MockCanvas::RestoreData{0}}}));
}
} // namespace testing
} // namespace flutter
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