| // 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_ |