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Use hint freed specifically for image disposal (flutter#20754)
* Use hint freed specifically for image disposal
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| Original file line number | Diff line number | Diff line change |
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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. | ||
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| #ifndef FLUTTER_LIB_UI_HINT_FREED_DELEGATE_H_ | ||
| #define FLUTTER_LIB_UI_HINT_FREED_DELEGATE_H_ | ||
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| namespace flutter { | ||
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| class HintFreedDelegate { | ||
| public: | ||
| //---------------------------------------------------------------------------- | ||
| /// @brief Notifies the engine that native bytes might be freed if a | ||
| /// garbage collection ran at the next NotifyIdle period. | ||
| /// | ||
| /// @param[in] size The number of bytes freed. This size adds to any | ||
| /// previously supplied value, rather than replacing. | ||
| /// | ||
| virtual void HintFreed(size_t size) = 0; | ||
| }; | ||
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| } // namespace flutter | ||
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| #endif // FLUTTER_LIB_UI_HINT_FREED_DELEGATE_H_ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| // 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. | ||
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| #define FML_USED_ON_EMBEDDER | ||
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| #include "flutter/common/task_runners.h" | ||
| #include "flutter/fml/synchronization/waitable_event.h" | ||
| #include "flutter/lib/ui/painting/image.h" | ||
| #include "flutter/lib/ui/painting/picture.h" | ||
| #include "flutter/runtime/dart_vm.h" | ||
| #include "flutter/shell/common/shell_test.h" | ||
| #include "flutter/shell/common/thread_host.h" | ||
| #include "flutter/testing/testing.h" | ||
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| namespace flutter { | ||
| namespace testing { | ||
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| class ImageDisposeTest : public ShellTest { | ||
| public: | ||
| template <class T> | ||
| T* GetNativePeer(Dart_NativeArguments args, int index) { | ||
| auto handle = Dart_GetNativeArgument(args, index); | ||
| intptr_t peer = 0; | ||
| EXPECT_FALSE(Dart_IsError(Dart_GetNativeInstanceField( | ||
| handle, tonic::DartWrappable::kPeerIndex, &peer))); | ||
| return reinterpret_cast<T*>(peer); | ||
| } | ||
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| // Used to wait on Dart callbacks or Shell task runner flushing | ||
| fml::AutoResetWaitableEvent message_latch_; | ||
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| fml::AutoResetWaitableEvent picture_finalizer_latch_; | ||
| static void picture_finalizer(void* isolate_callback_data, void* peer) { | ||
| auto latch = reinterpret_cast<fml::AutoResetWaitableEvent*>(peer); | ||
| latch->Signal(); | ||
| } | ||
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| sk_sp<SkPicture> current_picture_; | ||
| sk_sp<SkImage> current_image_; | ||
| }; | ||
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| TEST_F(ImageDisposeTest, ImageReleasedAfterFrame) { | ||
| auto native_capture_image_and_picture = [&](Dart_NativeArguments args) { | ||
| CanvasImage* image = GetNativePeer<CanvasImage>(args, 0); | ||
| Picture* picture = GetNativePeer<Picture>(args, 1); | ||
| ASSERT_FALSE(image->image()->unique()); | ||
| ASSERT_FALSE(picture->picture()->unique()); | ||
| current_image_ = image->image(); | ||
| current_picture_ = picture->picture(); | ||
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| Dart_NewFinalizableHandle(Dart_GetNativeArgument(args, 1), | ||
| &picture_finalizer_latch_, 0, &picture_finalizer); | ||
| }; | ||
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| auto native_on_begin_frame_done = [&](Dart_NativeArguments args) { | ||
| message_latch_.Signal(); | ||
| }; | ||
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| Settings settings = CreateSettingsForFixture(); | ||
| auto task_runner = CreateNewThread(); | ||
| TaskRunners task_runners("test", // label | ||
| GetCurrentTaskRunner(), // platform | ||
| task_runner, // raster | ||
| task_runner, // ui | ||
| task_runner // io | ||
| ); | ||
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| AddNativeCallback("CaptureImageAndPicture", | ||
| CREATE_NATIVE_ENTRY(native_capture_image_and_picture)); | ||
| AddNativeCallback("OnBeginFrameDone", | ||
| CREATE_NATIVE_ENTRY(native_on_begin_frame_done)); | ||
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| std::unique_ptr<Shell> shell = CreateShell(std::move(settings), task_runners); | ||
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| ASSERT_TRUE(shell->IsSetup()); | ||
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| SetViewportMetrics(shell.get(), 800, 600); | ||
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| shell->GetPlatformView()->NotifyCreated(); | ||
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| auto configuration = RunConfiguration::InferFromSettings(settings); | ||
| configuration.SetEntrypoint("pumpImage"); | ||
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| shell->RunEngine(std::move(configuration), [&](auto result) { | ||
| ASSERT_EQ(result, Engine::RunStatus::Success); | ||
| }); | ||
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| message_latch_.Wait(); | ||
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| ASSERT_TRUE(current_picture_); | ||
| ASSERT_TRUE(current_image_); | ||
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| // Simulate a large notify idle, as the animator would do | ||
| // when it has no frames left. | ||
| // On slower machines, this is especially important - we capture that | ||
| // this happens normally in devicelab bnechmarks like large_image_changer. | ||
| NotifyIdle(shell.get(), Dart_TimelineGetMicros() + 100000); | ||
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| picture_finalizer_latch_.Wait(); | ||
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| // Force a drain the SkiaUnrefQueue. | ||
| message_latch_.Reset(); | ||
| task_runner->PostTask([&, io_manager = shell->GetIOManager()]() { | ||
| io_manager->GetSkiaUnrefQueue()->Drain(); | ||
| message_latch_.Signal(); | ||
| }); | ||
| message_latch_.Wait(); | ||
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| EXPECT_TRUE(current_picture_->unique()); | ||
| current_picture_.reset(); | ||
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| EXPECT_TRUE(current_image_->unique()); | ||
| current_image_.reset(); | ||
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| shell->GetPlatformView()->NotifyDestroyed(); | ||
| DestroyShell(std::move(shell), std::move(task_runners)); | ||
| } | ||
|
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| } // namespace testing | ||
| } // namespace flutter |
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