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// Copyright 2018 The Chromium Authors
// 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 <list>
#include <memory>
#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:
explicit RecyclableCompositorMac(ui::ContextFactory* context_factory);
RecyclableCompositorMac(const RecyclableCompositorMac&) = delete;
RecyclableCompositorMac& operator=(const RecyclableCompositorMac&) = delete;
~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,
const gfx::DisplayColorSpaces& display_color_spaces,
int64_t display_id);
private:
// Invalidate the compositor's surface information.
void InvalidateSurface();
// ui::CompositorObserver implementation:
void OnCompositingDidCommit(ui::Compositor* compositor) override;
// 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;
std::unique_ptr<ui::AcceleratedWidgetMac> accelerated_widget_mac_;
ui::Compositor compositor_;
std::unique_ptr<ui::CompositorLock> compositor_suspended_lock_;
};
} // namespace ui
#endif // UI_COMPOSITOR_RECYCLABLE_COMPOSITOR_MAC_H_
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