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| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 #include "GpuTimer.h" | |
| 9 #include "gl/SkGLContext.h" | |
| 10 #include "gl/GrGLUtil.h" | |
| 11 | |
| 12 GpuTimer::GpuTimer(const SkGLContext* glctx) : fContext(glctx) { | |
| 13 if (fContext) { | |
| 14 fContext->ref(); | |
| 15 fContext->makeCurrent(); | |
| 16 fStarted = false; | |
| 17 fSupported = GrGLGetVersion(fContext->gl()) > GR_GL_VER(3,3) || | |
| 18 fContext->gl()->hasExtension("GL_ARB_timer_query") || | |
| 19 fContext->gl()->hasExtension("GL_EXT_timer_query"); | |
| 20 | |
| 21 if (fSupported) { | |
| 22 SK_GL(*fContext, GenQueries(1, &fQuery)); | |
| 23 } | |
| 24 } | |
| 25 } | |
| 26 | |
| 27 GpuTimer::~GpuTimer() { | |
| 28 if (fContext) { | |
| 29 if (fSupported) { | |
| 30 fContext->makeCurrent(); | |
| 31 SK_GL(*fContext, DeleteQueries(1, &fQuery)); | |
| 32 } | |
| 33 fContext->unref(); | |
| 34 } | |
| 35 } | |
| 36 | |
| 37 void GpuTimer::start() { | |
| 38 if (fContext && fSupported) { | |
| 39 fContext->makeCurrent(); | |
| 40 fStarted = true; | |
| 41 SK_GL(*fContext, BeginQuery(GR_GL_TIME_ELAPSED, fQuery)); | |
| 42 } | |
| 43 } | |
| 44 | |
| 45 /** | |
| 46 * It is important to stop the cpu clocks first, | |
| 47 * as this will cpu wait for the gpu to finish. | |
| 48 */ | |
| 49 double GpuTimer::end() { | |
| 50 if (fContext && fSupported) { | |
| 51 fStarted = false; | |
| 52 fContext->makeCurrent(); | |
| 53 SK_GL(*fContext, EndQuery(GR_GL_TIME_ELAPSED)); | |
| 54 | |
| 55 GrGLint available = 0; | |
| 56 while (!available) { | |
| 57 SK_GL_NOERRCHECK(*fContext, GetQueryObjectiv(fQuery, | |
| 58 GR_GL_QUERY_RESULT_AVAI
LABLE, | |
| 59 &available)); | |
| 60 // If GetQueryObjectiv is erroring out we need some alternative | |
| 61 // means of breaking out of this loop | |
| 62 GrGLenum error; | |
| 63 SK_GL_RET_NOERRCHECK(*fContext, error, GetError()); | |
| 64 if (GR_GL_NO_ERROR != error) { | |
| 65 break; | |
| 66 } | |
| 67 } | |
| 68 GrGLuint64 totalGPUTimeElapsed = 0; | |
| 69 SK_GL(*fContext, GetQueryObjectui64v(fQuery, | |
| 70 GR_GL_QUERY_RESULT, | |
| 71 &totalGPUTimeElapsed)); | |
| 72 | |
| 73 return totalGPUTimeElapsed / 1000000.0; | |
| 74 } else { | |
| 75 return 0; | |
| 76 } | |
| 77 } | |
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Chromium Code Reviews
Issue 1422513003:
SkTime::GetNSecs() (Closed)
Base URL: https://skia.googlesource.com/skia.git@master