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flutter_flutter/flow/layers/opacity_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/opacity_layer.h"
#include "flutter/flow/layers/clip_rect_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 OpacityLayerTest = LayerTest;
#ifndef NDEBUG
TEST_F(OpacityLayerTest, LeafLayer) {
auto layer =
std::make_shared<OpacityLayer>(SK_AlphaOPAQUE, SkPoint::Make(0.0f, 0.0f));
EXPECT_DEATH_IF_SUPPORTED(
layer->Preroll(preroll_context(), SkMatrix()),
"\\!GetChildContainer\\(\\)->layers\\(\\)\\.empty\\(\\)");
}
TEST_F(OpacityLayerTest, PaintingEmptyLayerDies) {
auto mock_layer = std::make_shared<MockLayer>(SkPath());
auto layer =
std::make_shared<OpacityLayer>(SK_AlphaOPAQUE, SkPoint::Make(0.0f, 0.0f));
layer->Add(mock_layer);
layer->Preroll(preroll_context(), SkMatrix());
EXPECT_EQ(mock_layer->paint_bounds(), SkPath().getBounds());
EXPECT_EQ(layer->paint_bounds(), mock_layer->paint_bounds());
EXPECT_FALSE(mock_layer->needs_painting());
EXPECT_FALSE(layer->needs_painting());
EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
"needs_painting\\(\\)");
}
TEST_F(OpacityLayerTest, PaintBeforePreollDies) {
SkPath child_path;
child_path.addRect(5.0f, 6.0f, 20.5f, 21.5f);
auto mock_layer = std::make_shared<MockLayer>(child_path);
auto layer =
std::make_shared<OpacityLayer>(SK_AlphaOPAQUE, SkPoint::Make(0.0f, 0.0f));
layer->Add(mock_layer);
EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
"needs_painting\\(\\)");
}
#endif
TEST_F(OpacityLayerTest, TranslateChildren) {
SkPath child_path1;
child_path1.addRect(10.0f, 10.0f, 20.0f, 20.f);
SkPaint child_paint1(SkColors::kGray);
auto layer = std::make_shared<OpacityLayer>(0.5, SkPoint::Make(10, 10));
auto mock_layer1 = std::make_shared<MockLayer>(child_path1, child_paint1);
layer->Add(mock_layer1);
auto initial_transform = SkMatrix::Scale(2.0, 2.0);
layer->Preroll(preroll_context(), initial_transform);
SkRect layer_bounds = mock_layer1->paint_bounds();
mock_layer1->parent_matrix().mapRect(&layer_bounds);
EXPECT_EQ(layer_bounds, SkRect::MakeXYWH(40, 40, 20, 20));
}
TEST_F(OpacityLayerTest, ChildIsCached) {
const SkAlpha alpha_half = 255 / 2;
auto initial_transform = SkMatrix::Translate(50.0, 25.5);
auto other_transform = SkMatrix::Scale(1.0, 2.0);
const SkPath child_path = SkPath().addRect(SkRect::MakeWH(5.0f, 5.0f));
auto mock_layer = std::make_shared<MockLayer>(child_path);
auto layer =
std::make_shared<OpacityLayer>(alpha_half, SkPoint::Make(0.0f, 0.0f));
layer->Add(mock_layer);
SkMatrix cache_ctm = initial_transform;
SkCanvas cache_canvas;
cache_canvas.setMatrix(cache_ctm);
SkCanvas other_canvas;
other_canvas.setMatrix(other_transform);
use_mock_raster_cache();
EXPECT_EQ(raster_cache()->GetLayerCachedEntriesCount(), (size_t)0);
EXPECT_FALSE(raster_cache()->Draw(mock_layer.get(), other_canvas));
EXPECT_FALSE(raster_cache()->Draw(mock_layer.get(), cache_canvas));
layer->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(raster_cache()->GetLayerCachedEntriesCount(), (size_t)1);
EXPECT_FALSE(raster_cache()->Draw(mock_layer.get(), other_canvas));
EXPECT_TRUE(raster_cache()->Draw(mock_layer.get(), cache_canvas));
}
TEST_F(OpacityLayerTest, ChildrenNotCached) {
const SkAlpha alpha_half = 255 / 2;
auto initial_transform = SkMatrix::Translate(50.0, 25.5);
auto other_transform = SkMatrix::Scale(1.0, 2.0);
const SkPath child_path1 = SkPath().addRect(SkRect::MakeWH(5.0f, 5.0f));
const SkPath child_path2 = SkPath().addRect(SkRect::MakeWH(5.0f, 5.0f));
auto mock_layer1 = std::make_shared<MockLayer>(child_path1);
auto mock_layer2 = std::make_shared<MockLayer>(child_path2);
auto layer =
std::make_shared<OpacityLayer>(alpha_half, SkPoint::Make(0.0f, 0.0f));
layer->Add(mock_layer1);
layer->Add(mock_layer2);
SkMatrix cache_ctm = initial_transform;
SkCanvas cache_canvas;
cache_canvas.setMatrix(cache_ctm);
SkCanvas other_canvas;
other_canvas.setMatrix(other_transform);
use_mock_raster_cache();
EXPECT_EQ(raster_cache()->GetLayerCachedEntriesCount(), (size_t)0);
EXPECT_FALSE(raster_cache()->Draw(mock_layer1.get(), other_canvas));
EXPECT_FALSE(raster_cache()->Draw(mock_layer1.get(), cache_canvas));
EXPECT_FALSE(raster_cache()->Draw(mock_layer2.get(), other_canvas));
EXPECT_FALSE(raster_cache()->Draw(mock_layer2.get(), cache_canvas));
layer->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(raster_cache()->GetLayerCachedEntriesCount(), (size_t)1);
EXPECT_FALSE(raster_cache()->Draw(mock_layer1.get(), other_canvas));
EXPECT_FALSE(raster_cache()->Draw(mock_layer1.get(), cache_canvas));
EXPECT_FALSE(raster_cache()->Draw(mock_layer2.get(), other_canvas));
EXPECT_FALSE(raster_cache()->Draw(mock_layer2.get(), cache_canvas));
}
TEST_F(OpacityLayerTest, FullyOpaque) {
const SkPath child_path = SkPath().addRect(SkRect::MakeWH(5.0f, 5.0f));
const SkPoint layer_offset = SkPoint::Make(0.5f, 1.5f);
const SkMatrix initial_transform = SkMatrix::Translate(0.5f, 0.5f);
const SkMatrix layer_transform =
SkMatrix::Translate(layer_offset.fX, layer_offset.fY);
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
const SkMatrix integral_layer_transform = RasterCache::GetIntegralTransCTM(
SkMatrix::Concat(initial_transform, layer_transform));
#endif
const SkPaint child_paint = SkPaint(SkColors::kGreen);
const SkRect expected_layer_bounds =
layer_transform.mapRect(child_path.getBounds());
auto mock_layer = std::make_shared<MockLayer>(child_path, child_paint);
auto layer = std::make_shared<OpacityLayer>(SK_AlphaOPAQUE, layer_offset);
layer->Add(mock_layer);
layer->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(), expected_layer_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_mutators(),
std::vector({Mutator(layer_transform), Mutator(SK_AlphaOPAQUE)}));
const SkPaint opacity_paint = SkPaint(SkColors::kBlack); // A = 1.0f
SkRect opacity_bounds;
expected_layer_bounds.makeOffset(-layer_offset.fX, -layer_offset.fY)
.roundOut(&opacity_bounds);
auto expected_draw_calls = std::vector(
{MockCanvas::DrawCall{0, MockCanvas::SaveData{1}},
MockCanvas::DrawCall{1, MockCanvas::ConcatMatrixData{layer_transform}},
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
MockCanvas::DrawCall{
1, MockCanvas::SetMatrixData{integral_layer_transform}},
#endif
MockCanvas::DrawCall{
1, MockCanvas::SaveLayerData{opacity_bounds, opacity_paint, nullptr,
2}},
MockCanvas::DrawCall{2,
MockCanvas::DrawPathData{child_path, child_paint}},
MockCanvas::DrawCall{2, MockCanvas::RestoreData{1}},
MockCanvas::DrawCall{1, MockCanvas::RestoreData{0}}});
layer->Paint(paint_context());
EXPECT_EQ(mock_canvas().draw_calls(), expected_draw_calls);
}
TEST_F(OpacityLayerTest, FullyTransparent) {
const SkPath child_path = SkPath().addRect(SkRect::MakeWH(5.0f, 5.0f));
const SkPoint layer_offset = SkPoint::Make(0.5f, 1.5f);
const SkMatrix initial_transform = SkMatrix::Translate(0.5f, 0.5f);
const SkMatrix layer_transform =
SkMatrix::Translate(layer_offset.fX, layer_offset.fY);
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
const SkMatrix integral_layer_transform = RasterCache::GetIntegralTransCTM(
SkMatrix::Concat(initial_transform, layer_transform));
#endif
const SkPaint child_paint = SkPaint(SkColors::kGreen);
const SkRect expected_layer_bounds =
layer_transform.mapRect(child_path.getBounds());
auto mock_layer = std::make_shared<MockLayer>(child_path, child_paint);
auto layer =
std::make_shared<OpacityLayer>(SK_AlphaTRANSPARENT, layer_offset);
layer->Add(mock_layer);
layer->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(), expected_layer_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_mutators(),
std::vector({Mutator(layer_transform), Mutator(SK_AlphaTRANSPARENT)}));
auto expected_draw_calls = std::vector(
{MockCanvas::DrawCall{0, MockCanvas::SaveData{1}},
MockCanvas::DrawCall{1, MockCanvas::ConcatMatrixData{layer_transform}},
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
MockCanvas::DrawCall{
1, MockCanvas::SetMatrixData{integral_layer_transform}},
#endif
MockCanvas::DrawCall{1, MockCanvas::SaveData{2}},
MockCanvas::DrawCall{
2, MockCanvas::ClipRectData{kEmptyRect, SkClipOp::kIntersect,
MockCanvas::kHard_ClipEdgeStyle}},
MockCanvas::DrawCall{2,
MockCanvas::DrawPathData{child_path, child_paint}},
MockCanvas::DrawCall{2, MockCanvas::RestoreData{1}},
MockCanvas::DrawCall{1, MockCanvas::RestoreData{0}}});
layer->Paint(paint_context());
EXPECT_EQ(mock_canvas().draw_calls(), expected_draw_calls);
}
TEST_F(OpacityLayerTest, HalfTransparent) {
const SkPath child_path = SkPath().addRect(SkRect::MakeWH(5.0f, 5.0f));
const SkPoint layer_offset = SkPoint::Make(0.5f, 1.5f);
const SkMatrix initial_transform = SkMatrix::Translate(0.5f, 0.5f);
const SkMatrix layer_transform =
SkMatrix::Translate(layer_offset.fX, layer_offset.fY);
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
const SkMatrix integral_layer_transform = RasterCache::GetIntegralTransCTM(
SkMatrix::Concat(initial_transform, layer_transform));
#endif
const SkPaint child_paint = SkPaint(SkColors::kGreen);
const SkRect expected_layer_bounds =
layer_transform.mapRect(child_path.getBounds());
const SkAlpha alpha_half = 255 / 2;
auto mock_layer = std::make_shared<MockLayer>(child_path, child_paint);
auto layer = std::make_shared<OpacityLayer>(alpha_half, layer_offset);
layer->Add(mock_layer);
layer->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(mock_layer->paint_bounds(), child_path.getBounds());
EXPECT_EQ(layer->paint_bounds(), expected_layer_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_mutators(),
std::vector({Mutator(layer_transform), Mutator(alpha_half)}));
const SkPaint opacity_paint =
SkPaint(SkColor4f::FromColor(SkColorSetA(SK_ColorBLACK, alpha_half)));
SkRect opacity_bounds;
expected_layer_bounds.makeOffset(-layer_offset.fX, -layer_offset.fY)
.roundOut(&opacity_bounds);
auto expected_draw_calls = std::vector(
{MockCanvas::DrawCall{0, MockCanvas::SaveData{1}},
MockCanvas::DrawCall{1, MockCanvas::ConcatMatrixData{layer_transform}},
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
MockCanvas::DrawCall{
1, MockCanvas::SetMatrixData{integral_layer_transform}},
#endif
MockCanvas::DrawCall{
1, MockCanvas::SaveLayerData{opacity_bounds, opacity_paint, nullptr,
2}},
MockCanvas::DrawCall{2,
MockCanvas::DrawPathData{child_path, child_paint}},
MockCanvas::DrawCall{2, MockCanvas::RestoreData{1}},
MockCanvas::DrawCall{1, MockCanvas::RestoreData{0}}});
layer->Paint(paint_context());
EXPECT_EQ(mock_canvas().draw_calls(), expected_draw_calls);
}
TEST_F(OpacityLayerTest, Nested) {
const SkPath child1_path = SkPath().addRect(SkRect::MakeWH(5.0f, 6.0f));
const SkPath child2_path = SkPath().addRect(SkRect::MakeWH(2.0f, 7.0f));
const SkPath child3_path = SkPath().addRect(SkRect::MakeWH(6.0f, 6.0f));
const SkPoint layer1_offset = SkPoint::Make(0.5f, 1.5f);
const SkPoint layer2_offset = SkPoint::Make(2.5f, 0.5f);
const SkMatrix initial_transform = SkMatrix::Translate(0.5f, 0.5f);
const SkMatrix layer1_transform =
SkMatrix::Translate(layer1_offset.fX, layer1_offset.fY);
const SkMatrix layer2_transform =
SkMatrix::Translate(layer2_offset.fX, layer2_offset.fY);
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
const SkMatrix integral_layer1_transform = RasterCache::GetIntegralTransCTM(
SkMatrix::Concat(initial_transform, layer1_transform));
const SkMatrix integral_layer2_transform = RasterCache::GetIntegralTransCTM(
SkMatrix::Concat(SkMatrix::Concat(initial_transform, layer1_transform),
layer2_transform));
#endif
const SkPaint child1_paint = SkPaint(SkColors::kRed);
const SkPaint child2_paint = SkPaint(SkColors::kBlue);
const SkPaint child3_paint = SkPaint(SkColors::kGreen);
const SkAlpha alpha1 = 155;
const SkAlpha alpha2 = 224;
auto mock_layer1 = std::make_shared<MockLayer>(child1_path, child1_paint);
auto mock_layer2 = std::make_shared<MockLayer>(child2_path, child2_paint);
auto mock_layer3 = std::make_shared<MockLayer>(child3_path, child3_paint);
auto layer1 = std::make_shared<OpacityLayer>(alpha1, layer1_offset);
auto layer2 = std::make_shared<OpacityLayer>(alpha2, layer2_offset);
layer2->Add(mock_layer2);
layer1->Add(mock_layer1);
layer1->Add(layer2);
layer1->Add(mock_layer3); // Ensure something is processed after recursion
const SkRect expected_layer2_bounds =
layer2_transform.mapRect(child2_path.getBounds());
SkRect expected_layer1_bounds = expected_layer2_bounds;
expected_layer1_bounds.join(child1_path.getBounds());
expected_layer1_bounds.join(child3_path.getBounds());
expected_layer1_bounds = layer1_transform.mapRect(expected_layer1_bounds);
layer1->Preroll(preroll_context(), initial_transform);
EXPECT_EQ(mock_layer1->paint_bounds(), child1_path.getBounds());
EXPECT_EQ(mock_layer2->paint_bounds(), child2_path.getBounds());
EXPECT_EQ(mock_layer3->paint_bounds(), child3_path.getBounds());
EXPECT_EQ(layer1->paint_bounds(), expected_layer1_bounds);
EXPECT_EQ(layer2->paint_bounds(), expected_layer2_bounds);
EXPECT_TRUE(mock_layer1->needs_painting());
EXPECT_TRUE(mock_layer2->needs_painting());
EXPECT_TRUE(mock_layer3->needs_painting());
EXPECT_TRUE(layer1->needs_painting());
EXPECT_TRUE(layer2->needs_painting());
EXPECT_EQ(mock_layer1->parent_matrix(),
SkMatrix::Concat(initial_transform, layer1_transform));
// EXPECT_EQ(mock_layer1->parent_mutators(),
// std::vector({Mutator(layer1_transform), Mutator(alpha1)}));
EXPECT_EQ(
mock_layer2->parent_matrix(),
SkMatrix::Concat(SkMatrix::Concat(initial_transform, layer1_transform),
layer2_transform));
// EXPECT_EQ(mock_layer2->parent_mutators(),
// std::vector({Mutator(layer1_transform), Mutator(alpha1),
// Mutator(layer2_transform), Mutator(alpha2)}));
EXPECT_EQ(mock_layer3->parent_matrix(),
SkMatrix::Concat(initial_transform, layer1_transform));
// EXPECT_EQ(mock_layer3->parent_mutators(),
// std::vector({Mutator(layer1_transform), Mutator(alpha1)}));
const SkPaint opacity1_paint =
SkPaint(SkColor4f::FromColor(SkColorSetA(SK_ColorBLACK, alpha1)));
const SkPaint opacity2_paint =
SkPaint(SkColor4f::FromColor(SkColorSetA(SK_ColorBLACK, alpha2)));
SkRect opacity1_bounds, opacity2_bounds;
expected_layer1_bounds.makeOffset(-layer1_offset.fX, -layer1_offset.fY)
.roundOut(&opacity1_bounds);
expected_layer2_bounds.makeOffset(-layer2_offset.fX, -layer2_offset.fY)
.roundOut(&opacity2_bounds);
auto expected_draw_calls = std::vector(
{MockCanvas::DrawCall{0, MockCanvas::SaveData{1}},
MockCanvas::DrawCall{1, MockCanvas::ConcatMatrixData{layer1_transform}},
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
MockCanvas::DrawCall{
1, MockCanvas::SetMatrixData{integral_layer1_transform}},
#endif
MockCanvas::DrawCall{
1, MockCanvas::SaveLayerData{opacity1_bounds, opacity1_paint,
nullptr, 2}},
MockCanvas::DrawCall{
2, MockCanvas::DrawPathData{child1_path, child1_paint}},
MockCanvas::DrawCall{2, MockCanvas::SaveData{3}},
MockCanvas::DrawCall{3, MockCanvas::ConcatMatrixData{layer2_transform}},
#ifndef SUPPORT_FRACTIONAL_TRANSLATION
MockCanvas::DrawCall{
3, MockCanvas::SetMatrixData{integral_layer2_transform}},
#endif
MockCanvas::DrawCall{
3, MockCanvas::SaveLayerData{opacity2_bounds, opacity2_paint,
nullptr, 4}},
MockCanvas::DrawCall{
4, MockCanvas::DrawPathData{child2_path, child2_paint}},
MockCanvas::DrawCall{4, MockCanvas::RestoreData{3}},
MockCanvas::DrawCall{3, MockCanvas::RestoreData{2}},
MockCanvas::DrawCall{
2, MockCanvas::DrawPathData{child3_path, child3_paint}},
MockCanvas::DrawCall{2, MockCanvas::RestoreData{1}},
MockCanvas::DrawCall{1, MockCanvas::RestoreData{0}}});
layer1->Paint(paint_context());
EXPECT_EQ(mock_canvas().draw_calls(), expected_draw_calls);
}
TEST_F(OpacityLayerTest, Readback) {
auto initial_transform = SkMatrix();
auto layer = std::make_shared<OpacityLayer>(kOpaque_SkAlphaType, SkPoint());
layer->Add(std::make_shared<MockLayer>(SkPath()));
// OpacityLayer does not read from surface
preroll_context()->surface_needs_readback = false;
layer->Preroll(preroll_context(), initial_transform);
EXPECT_FALSE(preroll_context()->surface_needs_readback);
// OpacityLayer blocks child with readback
auto mock_layer =
std::make_shared<MockLayer>(SkPath(), SkPaint(), false, false, true);
layer->Add(mock_layer);
preroll_context()->surface_needs_readback = false;
layer->Preroll(preroll_context(), initial_transform);
EXPECT_FALSE(preroll_context()->surface_needs_readback);
}
TEST_F(OpacityLayerTest, CullRectIsTransformed) {
auto clipRectLayer = std::make_shared<ClipRectLayer>(
SkRect::MakeLTRB(0, 0, 10, 10), flutter::hardEdge);
auto opacityLayer =
std::make_shared<OpacityLayer>(128, SkPoint::Make(20, 20));
auto mockLayer = std::make_shared<MockLayer>(SkPath());
clipRectLayer->Add(opacityLayer);
opacityLayer->Add(mockLayer);
clipRectLayer->Preroll(preroll_context(), SkMatrix::I());
EXPECT_EQ(mockLayer->parent_cull_rect().fLeft, -20);
EXPECT_EQ(mockLayer->parent_cull_rect().fTop, -20);
}
} // namespace testing
} // namespace flutter
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