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// Copyright (c) 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_GL_EGL_TIMESTAMPS_H_
#define UI_GL_EGL_TIMESTAMPS_H_
#include "base/time/time.h"
#include "ui/gl/gl_export.h"
namespace gl {
// Interface to query EGL timestamps.
class GL_EXPORT EGLTimestampClient {
public:
virtual ~EGLTimestampClient() {}
// Returns whether EGL Timestamps are supported or not.
virtual bool IsEGLTimestampSupported() const = 0;
// Returns false if the egl timestamps are pending for the given frame id. If
// timestamps are pending, it means the frame is not yet done. Also returns
// the presentation time, composite interval and presentation flags for a
// frame as out parameters.
virtual bool GetFrameTimestampInfoIfAvailable(
base::TimeTicks* presentation_time,
base::TimeDelta* composite_interval,
uint32_t* presentation_flags,
int frame_id) = 0;
};
} // namespace gl
#endif // UI_GL_EGL_TIMESTAMPS_H_
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