mtklein | 9ac68ee | 2014-06-20 11:29:20 -0700 | [diff] [blame] | 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" |
kkinnunen | 9e61bb7 | 2014-10-09 05:24:15 -0700 | [diff] [blame^] | 9 | #include "gl/SkGLContext.h" |
mtklein | 9ac68ee | 2014-06-20 11:29:20 -0700 | [diff] [blame] | 10 | #include "gl/GrGLUtil.h" |
| 11 | |
kkinnunen | 9e61bb7 | 2014-10-09 05:24:15 -0700 | [diff] [blame^] | 12 | GpuTimer::GpuTimer(const SkGLContext* glctx) : fContext(glctx) { |
mtklein | 9ac68ee | 2014-06-20 11:29:20 -0700 | [diff] [blame] | 13 | if (fContext) { |
| 14 | fContext->ref(); |
| 15 | fContext->makeCurrent(); |
| 16 | fStarted = false; |
| 17 | fSupported = GrGLGetVersion(fContext->gl()) > GR_GL_VER(3,3) || |
| 18 | fContext->hasExtension("GL_ARB_timer_query") || |
| 19 | fContext->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_AVAILABLE, |
| 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 | } |