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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) | |
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 | |
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