85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_VSYNCSOURCE_H
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#define GFX_VSYNCSOURCE_H
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#include "nsTArray.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/Mutex.h"
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#include "mozilla/TimeStamp.h"
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#include "nsISupportsImpl.h"
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namespace mozilla {
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class RefreshTimerVsyncDispatcher;
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class CompositorVsyncDispatcher;
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namespace gfx {
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// Controls how and when to enable/disable vsync. Lives as long as the
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// gfxPlatform does on the parent process
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class VsyncSource
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{
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VsyncSource)
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typedef mozilla::RefreshTimerVsyncDispatcher RefreshTimerVsyncDispatcher;
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typedef mozilla::CompositorVsyncDispatcher CompositorVsyncDispatcher;
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public:
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// Controls vsync unique to each display and unique on each platform
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class Display {
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public:
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Display();
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virtual ~Display();
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// Notified when this display's vsync occurs, on the vsync thread
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// The aVsyncTimestamp should normalize to the Vsync time that just occured
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// However, different platforms give different vsync notification times.
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// b2g - The vsync timestamp of the previous frame that was just displayed
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// OSX - The vsync timestamp of the upcoming frame, in the future
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// Windows: It's messy, see gfxWindowsPlatform.
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// Android: TODO
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// All platforms should normalize to the vsync that just occured.
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// Large parts of Gecko assume TimeStamps should not be in the future such as animations
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virtual void NotifyVsync(TimeStamp aVsyncTimestamp);
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RefPtr<RefreshTimerVsyncDispatcher> GetRefreshTimerVsyncDispatcher();
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void AddCompositorVsyncDispatcher(CompositorVsyncDispatcher* aCompositorVsyncDispatcher);
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void RemoveCompositorVsyncDispatcher(CompositorVsyncDispatcher* aCompositorVsyncDispatcher);
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void NotifyRefreshTimerVsyncStatus(bool aEnable);
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virtual TimeDuration GetVsyncRate();
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// These should all only be called on the main thread
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virtual void EnableVsync() = 0;
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virtual void DisableVsync() = 0;
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virtual bool IsVsyncEnabled() = 0;
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virtual void Shutdown() = 0;
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private:
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void UpdateVsyncStatus();
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Mutex mDispatcherLock;
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bool mRefreshTimerNeedsVsync;
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nsTArray<RefPtr<CompositorVsyncDispatcher>> mCompositorVsyncDispatchers;
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RefPtr<RefreshTimerVsyncDispatcher> mRefreshTimerVsyncDispatcher;
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};
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void AddCompositorVsyncDispatcher(CompositorVsyncDispatcher* aCompositorVsyncDispatcher);
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void RemoveCompositorVsyncDispatcher(CompositorVsyncDispatcher* aCompositorVsyncDispatcher);
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RefPtr<RefreshTimerVsyncDispatcher> GetRefreshTimerVsyncDispatcher();
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virtual Display& GetGlobalDisplay() = 0; // Works across all displays
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void Shutdown();
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protected:
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virtual ~VsyncSource() {}
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};
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} // namespace gfx
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} // namespace mozilla
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#endif /* GFX_VSYNCSOURCE_H */
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