| // Copyright 2013 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 CC_OUTPUT_BEGIN_FRAME_ARGS_H_ |
| #define CC_OUTPUT_BEGIN_FRAME_ARGS_H_ |
| |
| #include "base/time/time.h" |
| #include "cc/base/cc_export.h" |
| |
| namespace cc { |
| |
| struct CC_EXPORT BeginFrameArgs { |
| // Creates an invalid set of values. |
| BeginFrameArgs(); |
| |
| // You should be able to find all instances where a BeginFrame has been |
| // created by searching for "BeginFrameArgs::Create". |
| static BeginFrameArgs Create(base::TimeTicks frame_time, |
| base::TimeTicks deadline, |
| base::TimeDelta interval); |
| static BeginFrameArgs CreateForSynchronousCompositor(); |
| static BeginFrameArgs CreateForTesting(); |
| static BeginFrameArgs CreateExpiredForTesting(); |
| |
| // This is the default delta that will be used to adjust the deadline when |
| // proper draw-time estimations are not yet available. |
| static base::TimeDelta DefaultDeadlineAdjustment(); |
| |
| // This is the default interval to use to avoid sprinkling the code with |
| // magic numbers. |
| static base::TimeDelta DefaultInterval(); |
| |
| // This is the default amount of time after the frame_time to retroactively |
| // send a BeginFrame that had been skipped. This only has an effect if the |
| // deadline has passed, since the deadline is also used to trigger BeginFrame |
| // retroactively. |
| static base::TimeDelta DefaultRetroactiveBeginFramePeriod(); |
| |
| bool IsValid() const { return interval >= base::TimeDelta(); } |
| |
| base::TimeTicks frame_time; |
| base::TimeTicks deadline; |
| base::TimeDelta interval; |
| |
| private: |
| BeginFrameArgs(base::TimeTicks frame_time, |
| base::TimeTicks deadline, |
| base::TimeDelta interval); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_OUTPUT_BEGIN_FRAME_ARGS_H_ |