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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef UI_GFX_FRAME_TIME_H | 5 #ifndef UI_GFX_FRAME_TIME_H |
| 6 #define UI_GFX_FRAME_TIME_H | 6 #define UI_GFX_FRAME_TIME_H |
| 7 | 7 |
| 8 #include "base/time/time.h" | 8 #include "base/time/time.h" |
| 9 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 | 10 |
| (...skipping 10 matching lines...) Expand all Loading... |
| 21 } | 21 } |
| 22 | 22 |
| 23 #if defined(OS_WIN) | 23 #if defined(OS_WIN) |
| 24 static base::TimeTicks FromQPCValue(LONGLONG qpc_value) { | 24 static base::TimeTicks FromQPCValue(LONGLONG qpc_value) { |
| 25 DCHECK(TimestampsAreHighRes()); | 25 DCHECK(TimestampsAreHighRes()); |
| 26 return base::TimeTicks::FromQPCValue(qpc_value); | 26 return base::TimeTicks::FromQPCValue(qpc_value); |
| 27 } | 27 } |
| 28 #endif | 28 #endif |
| 29 | 29 |
| 30 static bool TimestampsAreHighRes() { | 30 static bool TimestampsAreHighRes() { |
| 31 // This should really return base::TimeTicks::IsHighResNowFastAndReliable(); | 31 #if defined(OS_WIN) |
| 32 // Returning false makes sure we are only using low-res timestamps until we | 32 return base::TimeTicks::IsHighResClockWorking(); |
| 33 // use FrameTime everywhere we need to. See crbug.com/315334 | 33 #else |
| 34 return false; | 34 return false; |
| 35 #endif |
| 35 } | 36 } |
| 36 }; | 37 }; |
| 37 | 38 |
| 38 } | 39 } |
| 39 | 40 |
| 40 #endif // UI_GFX_FRAME_TIME_H | 41 #endif // UI_GFX_FRAME_TIME_H |
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