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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/delegated_frame_host.h"
#include <cstddef>
#include <memory>
#include "base/run_loop.h"
#include "base/task/single_thread_task_runner.h"
#include "components/viz/client/frame_evictor.h"
#include "components/viz/common/surfaces/frame_sink_id.h"
#include "content/public/test/browser_task_environment.h"
#include "content/public/test/test_image_transport_factory.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/test/test_context_factories.h"
namespace content {
class MockDelegatedFrameHostClient : public DelegatedFrameHostClient {
public:
MockDelegatedFrameHostClient() = default;
~MockDelegatedFrameHostClient() override = default;
MOCK_METHOD(ui::Layer*, DelegatedFrameHostGetLayer, (), (const, override));
MOCK_METHOD(bool, DelegatedFrameHostIsVisible, (), (const, override));
MOCK_METHOD(SkColor, DelegatedFrameHostGetGutterColor, (), (const, override));
MOCK_METHOD2(OnFrameTokenChanged,
void(uint32_t frame_token, base::TimeTicks activation_time));
MOCK_METHOD(float, GetDeviceScaleFactor, (), (const, override));
MOCK_METHOD0(InvalidateLocalSurfaceIdOnEviction, void());
MOCK_METHOD(viz::FrameEvictorClient::EvictIds,
CollectSurfaceIdsForEviction,
(),
(override));
MOCK_METHOD0(ShouldShowStaleContentOnEviction, bool());
};
class DelegatedFrameHostTest : public testing::Test {
public:
DelegatedFrameHostTest() = default;
~DelegatedFrameHostTest() override = default;
DelegatedFrameHost* delegated_frame_host() {
return delegated_frame_host_.get();
}
void SetUp() override;
private:
BrowserTaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME,
base::test::TaskEnvironment::ThreadingMode::MULTIPLE_THREADS,
base::test::TaskEnvironment::MainThreadType::UI};
testing::StrictMock<MockDelegatedFrameHostClient> mock_client_;
std::unique_ptr<DelegatedFrameHost> delegated_frame_host_;
ui::TestContextFactories context_factory_{/*enable_pixel_output=*/false};
std::unique_ptr<ui::Compositor> compositor_;
};
void DelegatedFrameHostTest::SetUp() {
ImageTransportFactory::SetFactory(
std::make_unique<TestImageTransportFactory>());
viz::FrameSinkId frame_sink_id =
context_factory_.GetContextFactory()->AllocateFrameSinkId();
compositor_ = std::make_unique<ui::Compositor>(
frame_sink_id, context_factory_.GetContextFactory(),
base::SingleThreadTaskRunner::GetCurrentDefault(),
/*enable_pixel_canvas=*/false);
EXPECT_CALL(mock_client_, DelegatedFrameHostIsVisible)
.Times(1)
.WillOnce(testing::Return(false));
delegated_frame_host_ = std::make_unique<DelegatedFrameHost>(
frame_sink_id, &mock_client_, /*should_register_frame_sink_id=*/false);
delegated_frame_host_->AttachToCompositor(compositor_.get());
}
TEST_F(DelegatedFrameHostTest, NoCopyOutputRequestWithNoValidSurface) {
auto* dfh = delegated_frame_host();
EXPECT_FALSE(dfh->CanCopyFromCompositingSurface());
// Navigating while hidden would not lead to a call to `EmbedSurface` so we
// should remain unable to perform a copy.
dfh->DidNavigateMainFramePreCommit();
dfh->DidNavigate();
EXPECT_FALSE(dfh->CanCopyFromCompositingSurface());
// Since we have not called `DelegatedFrameHost::EmbedSurface` we have no
// valid `viz::Surface` to perform readback for. The callback given to
// `CopyFromCompositingSurface` is expected to run with an empty `SkBitmap`.
//
// `CopyFromCompositingSurface1 creates a
// `ui::Compositor::ScopedKeepSurfaceAliveCallback` to ensure that we keep the
// surface alive until the copy completes. This callback is bound on the UI
// thread. `viz::CopyOutputRequest` tries to use background threadpools for
// copying. The following will crash on DCHECK builds if we run on the wrong
// sequence.
base::RunLoop run_loop;
dfh->CopyFromCompositingSurface(
/*src_subrect=*/gfx::Rect(),
/*output_size=*/gfx::Size(),
base::BindOnce(
[](base::RepeatingClosure quit_closure, const SkBitmap& bitmap) {
EXPECT_TRUE(bitmap.empty());
quit_closure.Run();
},
run_loop.QuitClosure()));
run_loop.Run();
}
} // namespace content
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