| // Copyright 2018 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_VIZ_COMMON_CONSTANTS_H_ |
| #define COMPONENTS_VIZ_COMMON_CONSTANTS_H_ |
| |
| #include <stdint.h> |
| |
| #include "base/time/time.h" |
| #include "components/viz/common/viz_common_export.h" |
| |
| namespace viz { |
| |
| // Keep list in alphabetical order. |
| VIZ_COMMON_EXPORT extern const uint32_t kDefaultActivationDeadlineInFrames; |
| |
| // When throttling is enabled we estimate if vsync and sink frame rate are at |
| // a simple cadence. If they are, then this value represents the maximum time |
| // until the next glitch (jank) would occur caused by the drift/error |
| // introduced per throttle due to the estimation not being exact. If any |
| // cadence combo where to make glitches happen more frequently than this value |
| // then it won't be considered a simple cadence and thus won't be throttled. |
| VIZ_COMMON_EXPORT extern const base::TimeDelta kMaxTimeUntilNextGlitch; |
| |
| } // namespace viz |
| |
| #endif // COMPONENTS_VIZ_COMMON_CONSTANTS_H_ |