OLD | NEW |
(Empty) | |
| 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 "BenchGpuTimer_gl.h" |
| 9 #include "gl/SkGLContextHelper.h" |
| 10 #include "gl/GrGLUtil.h" |
| 11 |
| 12 BenchGpuTimer::BenchGpuTimer(const SkGLContextHelper* glctx) { |
| 13 fContext = glctx; |
| 14 glctx->ref(); |
| 15 glctx->makeCurrent(); |
| 16 fStarted = false; |
| 17 fSupported = GrGLGetVersion(glctx->gl()) > GR_GL_VER(3,3) || |
| 18 glctx->hasExtension("GL_ARB_timer_query") || |
| 19 glctx->hasExtension("GL_EXT_timer_query"); |
| 20 |
| 21 if (fSupported) { |
| 22 SK_GL(*glctx, GenQueries(1, &fQuery)); |
| 23 } |
| 24 } |
| 25 |
| 26 BenchGpuTimer::~BenchGpuTimer() { |
| 27 if (fSupported) { |
| 28 fContext->makeCurrent(); |
| 29 SK_GL(*fContext, DeleteQueries(1, &fQuery)); |
| 30 } |
| 31 fContext->unref(); |
| 32 } |
| 33 |
| 34 void BenchGpuTimer::startGpu() { |
| 35 if (fSupported) { |
| 36 fContext->makeCurrent(); |
| 37 fStarted = true; |
| 38 SK_GL(*fContext, BeginQuery(GR_GL_TIME_ELAPSED, fQuery)); |
| 39 } |
| 40 } |
| 41 |
| 42 /** |
| 43 * It is important to stop the cpu clocks first, |
| 44 * as this will cpu wait for the gpu to finish. |
| 45 */ |
| 46 double BenchGpuTimer::endGpu() { |
| 47 if (fSupported) { |
| 48 fStarted = false; |
| 49 fContext->makeCurrent(); |
| 50 SK_GL(*fContext, EndQuery(GR_GL_TIME_ELAPSED)); |
| 51 |
| 52 GrGLint available = 0; |
| 53 while (!available) { |
| 54 SK_GL_NOERRCHECK(*fContext, GetQueryObjectiv(fQuery, |
| 55 GR_GL_QUERY_RESULT_AVAILABLE, |
| 56 &available)); |
| 57 // If GetQueryObjectiv is erroring out we need some alternative |
| 58 // means of breaking out of this loop |
| 59 GrGLenum error; |
| 60 SK_GL_RET_NOERRCHECK(*fContext, error, GetError()); |
| 61 if (GR_GL_NO_ERROR != error) { |
| 62 break; |
| 63 } |
| 64 } |
| 65 GrGLuint64 totalGPUTimeElapsed = 0; |
| 66 SK_GL(*fContext, GetQueryObjectui64v(fQuery, |
| 67 GR_GL_QUERY_RESULT, |
| 68 &totalGPUTimeElapsed)); |
| 69 |
| 70 return totalGPUTimeElapsed / 1000000.0; |
| 71 } else { |
| 72 return 0; |
| 73 } |
| 74 } |
OLD | NEW |