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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_VIZ_SERVICE_FRAME_SINKS_EXTERNAL_BEGIN_FRAME_SOURCE_WIN_H_
#define COMPONENTS_VIZ_SERVICE_FRAME_SINKS_EXTERNAL_BEGIN_FRAME_SOURCE_WIN_H_
#include "components/viz/common/display/update_vsync_parameters_callback.h"
#include "components/viz/common/frame_sinks/begin_frame_source.h"
#include "components/viz/service/viz_service_export.h"
#include "ui/gl/vsync_thread_win.h"
namespace viz {
// Receives begin frames from VSyncThreadWin.
class VIZ_SERVICE_EXPORT ExternalBeginFrameSourceWin
: public ExternalBeginFrameSource,
public ExternalBeginFrameSourceClient,
public gl::VSyncThreadWin::VSyncObserver {
public:
ExternalBeginFrameSourceWin(
uint32_t restart_id,
scoped_refptr<base::SequencedTaskRunner> task_runner);
ExternalBeginFrameSourceWin(const ExternalBeginFrameSourceWin&) = delete;
ExternalBeginFrameSourceWin& operator=(const ExternalBeginFrameSourceWin&) =
delete;
~ExternalBeginFrameSourceWin() override;
// ExternalBeginFrameSource implementation.
BeginFrameArgs GetMissedBeginFrameArgs(BeginFrameObserver* obs) override;
void SetPreferredInterval(base::TimeDelta interval) override;
void SetVSyncDisplayID(int64_t display_id) override;
// ExternalBeginFrameSourceClient implementation.
void OnNeedsBeginFrames(bool needs_begin_frames) override;
// gl::VSyncThreadWin::VSyncObserver implementation.
void OnVSync(base::TimeTicks vsync_time, base::TimeDelta interval) override;
private:
void OnVSyncOnSequence(base::TimeTicks vsync_time, base::TimeDelta interval);
scoped_refptr<base::SequencedTaskRunner> task_runner_;
BeginFrameArgsGenerator begin_frame_args_generator_;
bool observing_vsync_ = false;
bool run_at_half_refresh_rate_ = false;
bool skip_next_vsync_ = false;
base::TimeDelta vsync_interval_ = BeginFrameArgs::DefaultInterval();
base::WeakPtrFactory<ExternalBeginFrameSourceWin> weak_factory_{this};
};
} // namespace viz
#endif // COMPONENTS_VIZ_SERVICE_FRAME_SINKS_EXTERNAL_BEGIN_FRAME_SOURCE_WIN_H_
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