mtklein | 9ac68ee | 2014-06-20 11:29:20 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2011 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | #ifndef Timer_DEFINED |
| 8 | #define Timer_DEFINED |
| 9 | |
| 10 | #include "SkTypes.h" |
| 11 | |
| 12 | #if defined(SK_BUILD_FOR_WIN32) |
| 13 | #include "SysTimer_windows.h" |
| 14 | #elif defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) |
| 15 | #include "SysTimer_mach.h" |
| 16 | #elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID) |
| 17 | #include "SysTimer_posix.h" |
| 18 | #endif |
| 19 | |
| 20 | #if SK_SUPPORT_GPU |
| 21 | #include "GpuTimer.h" |
| 22 | #endif |
| 23 | |
| 24 | class SkGLContextHelper; |
| 25 | |
| 26 | /** |
| 27 | * SysTimers and GpuTimers are implemented orthogonally. |
| 28 | * This class combines 2 SysTimers and a GpuTimer into one single, |
| 29 | * platform specific Timer with a simple interface. The truncated |
| 30 | * timer doesn't include the time required for the GPU to finish |
| 31 | * its rendering. It should always be <= the un-truncated system |
| 32 | * times and (for GPU configurations) can be used to roughly (very |
| 33 | * roughly) gauge the GPU load/backlog. |
| 34 | */ |
| 35 | class Timer { |
| 36 | public: |
| 37 | explicit Timer(SkGLContextHelper* gl = NULL); |
| 38 | |
| 39 | void start(); |
| 40 | void truncatedEnd(); |
| 41 | void end(); |
| 42 | |
| 43 | // All times in milliseconds. |
| 44 | double fCpu; |
| 45 | double fWall; |
| 46 | double fTruncatedCpu; |
| 47 | double fTruncatedWall; |
| 48 | double fGpu; |
| 49 | |
| 50 | private: |
| 51 | SysTimer fSysTimer; |
| 52 | SysTimer fTruncatedSysTimer; |
| 53 | #if SK_SUPPORT_GPU |
| 54 | GpuTimer fGpuTimer; |
| 55 | #endif |
| 56 | }; |
| 57 | |
| 58 | // Same as Timer above, supporting only fWall but with much lower overhead. |
| 59 | // (Typically, ~30ns instead of Timer's ~1us.) |
| 60 | class WallTimer { |
| 61 | public: |
| 62 | WallTimer(); |
| 63 | |
| 64 | void start(); |
| 65 | void end(); |
| 66 | |
| 67 | double fWall; // Milliseconds. |
| 68 | |
| 69 | private: |
| 70 | SysTimer fSysTimer; |
| 71 | }; |
| 72 | |
| 73 | #endif |