| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_COMPOSITOR_RECYCLABLE_COMPOSITOR_MAC_H_ |
| #define UI_COMPOSITOR_RECYCLABLE_COMPOSITOR_MAC_H_ |
| |
| #include "base/no_destructor.h" |
| #include "components/viz/common/surfaces/local_surface_id.h" |
| #include "components/viz/common/surfaces/parent_local_surface_id_allocator.h" |
| #include "ui/accelerated_widget_mac/accelerated_widget_mac.h" |
| #include "ui/compositor/compositor.h" |
| #include "ui/compositor/compositor_export.h" |
| #include "ui/compositor/compositor_observer.h" |
| |
| namespace ui { |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // RecyclableCompositorMac |
| // |
| // A ui::Compositor and a gfx::AcceleratedWidget (and helper) that it draws |
| // into. This structure is used to efficiently recycle these structures across |
| // tabs (because creating a new ui::Compositor for each tab would be expensive |
| // in terms of time and resources). |
| class COMPOSITOR_EXPORT RecyclableCompositorMac |
| : public ui::CompositorObserver { |
| public: |
| RecyclableCompositorMac(ui::ContextFactory* context_factory, |
| ui::ContextFactoryPrivate* context_factory_private); |
| ~RecyclableCompositorMac() override; |
| |
| ui::Compositor* compositor() { return &compositor_; } |
| ui::AcceleratedWidgetMac* widget() { return accelerated_widget_mac_.get(); } |
| const gfx::Size pixel_size() const { return size_pixels_; } |
| float scale_factor() const { return scale_factor_; } |
| |
| // Suspend will prevent the compositor from producing new frames. This should |
| // be called to avoid creating spurious frames while changing state. |
| // Compositors are created as suspended. |
| void Suspend(); |
| void Unsuspend(); |
| |
| // Update the compositor's surface information, if needed. |
| void UpdateSurface(const gfx::Size& size_pixels, float scale_factor); |
| // Invalidate the compositor's surface information. |
| void InvalidateSurface(); |
| |
| // The viz::ParentLocalSurfaceIdAllocator for the ui::Compositor dispenses |
| // viz::LocalSurfaceIds that are renderered into by the ui::Compositor. |
| viz::ParentLocalSurfaceIdAllocator local_surface_id_allocator_; |
| gfx::Size size_pixels_; |
| float scale_factor_ = 1.f; |
| |
| private: |
| friend class RecyclableCompositorMacFactory; |
| |
| // ui::CompositorObserver implementation: |
| void OnCompositingDidCommit(ui::Compositor* compositor) override; |
| |
| std::unique_ptr<ui::AcceleratedWidgetMac> accelerated_widget_mac_; |
| ui::Compositor compositor_; |
| std::unique_ptr<ui::CompositorLock> compositor_suspended_lock_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RecyclableCompositorMac); |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // RecyclableCompositorMacFactory |
| // |
| // The factory through which RecyclableCompositorMacs are created and recycled. |
| |
| class COMPOSITOR_EXPORT RecyclableCompositorMacFactory { |
| public: |
| static RecyclableCompositorMacFactory* Get(); |
| |
| // Create a compositor, or recycle a preexisting one. |
| std::unique_ptr<RecyclableCompositorMac> CreateCompositor( |
| ui::ContextFactory* context_factory, |
| ui::ContextFactoryPrivate* context_factory_private, |
| bool force_new_compositor = false); |
| |
| // Delete a compositor, or allow it to be recycled. |
| void RecycleCompositor(std::unique_ptr<RecyclableCompositorMac> compositor); |
| |
| // Destroy any compositors that are being kept around for recycling. |
| void DisableRecyclingForShutdown(); |
| |
| private: |
| friend class base::NoDestructor<ui::RecyclableCompositorMacFactory>; |
| friend class RecyclableCompositorMac; |
| RecyclableCompositorMacFactory(); |
| ~RecyclableCompositorMacFactory(); |
| void ReduceSpareCompositors(); |
| |
| bool recycling_disabled_ = false; |
| std::list<std::unique_ptr<RecyclableCompositorMac>> compositors_; |
| base::WeakPtrFactory<RecyclableCompositorMacFactory> weak_factory_; |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_COMPOSITOR_RECYCLABLE_COMPOSITOR_MAC_H_ |