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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CONTENT_BROWSER_COMPOSITOR_GPU_VSYNC_BEGIN_FRAME_SOURCE_H_ | |
6 #define CONTENT_BROWSER_COMPOSITOR_GPU_VSYNC_BEGIN_FRAME_SOURCE_H_ | |
7 | |
8 #include "base/memory/weak_ptr.h" | |
9 #include "base/time/time.h" | |
10 #include "cc/scheduler/begin_frame_source.h" | |
11 | |
12 namespace content { | |
13 | |
14 // This class is used to control VSync production on GPU side. | |
15 class GpuVSyncControl { | |
stanisc
2017/01/24 21:23:25
Should this be moved to the same header file with
enne (OOO)
2017/01/24 21:32:07
Yeah, that seems reasonable.
| |
16 public: | |
17 virtual void SetNeedsVSync(bool needs_vsync) = 0; | |
18 }; | |
19 | |
20 // This is a type of ExternalBeginFrameSource where VSync signals are | |
21 // generated externally on GPU side. | |
22 class GpuVSyncBeginFrameSource : public cc::ExternalBeginFrameSource, | |
stanisc
2017/01/24 21:23:25
Since this class is so simple now should it be mov
enne (OOO)
2017/01/24 21:32:07
I don't feel strongly. I think it's fine to leave
| |
23 cc::ExternalBeginFrameSourceClient { | |
24 public: | |
25 explicit GpuVSyncBeginFrameSource(GpuVSyncControl* vsync_control); | |
26 ~GpuVSyncBeginFrameSource() override; | |
27 | |
28 // cc::ExternalBeginFrameSourceClient implementation. | |
29 void OnNeedsBeginFrames(bool needs_begin_frames) override; | |
30 | |
31 void OnVSync(base::TimeTicks timestamp, base::TimeDelta interval); | |
32 | |
33 private: | |
34 GpuVSyncControl* const vsync_control_; | |
35 bool needs_begin_frames_; | |
36 uint64_t next_sequence_number_; | |
37 | |
38 DISALLOW_COPY_AND_ASSIGN(GpuVSyncBeginFrameSource); | |
39 }; | |
40 | |
41 } // namespace content | |
42 | |
43 #endif // CONTENT_BROWSER_COMPOSITOR_GPU_VSYNC_BEGIN_FRAME_SOURCE_H_ | |
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