1/* 2 * Copyright 2014 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 8#include "Benchmark.h" 9#include "SkBlurImageFilter.h" 10#include "SkCanvas.h" 11#include "SkMergeImageFilter.h" 12 13enum { kNumInputs = 5 }; 14 15// Exercise a blur filter connected to 5 inputs of the same merge filter. 16// This bench shows an improvement in performance once cacheing of re-used 17// nodes is implemented, since the DAG is no longer flattened to a tree. 18 19class ImageFilterDAGBench : public Benchmark { 20public: 21 ImageFilterDAGBench() {} 22 23protected: 24 virtual const char* onGetName() SK_OVERRIDE { 25 return "image_filter_dag"; 26 } 27 28 virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE { 29 for (int j = 0; j < loops; j++) { 30 SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(20.0f, 20.0f)); 31 SkImageFilter* inputs[kNumInputs]; 32 for (int i = 0; i < kNumInputs; ++i) { 33 inputs[i] = blur.get(); 34 } 35 SkAutoTUnref<SkImageFilter> merge(SkMergeImageFilter::Create(inputs, kNumInputs)); 36 SkPaint paint; 37 paint.setImageFilter(merge); 38 SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400)); 39 canvas->drawRect(rect, paint); 40 } 41 } 42 43private: 44 typedef Benchmark INHERITED; 45}; 46 47DEF_BENCH(return new ImageFilterDAGBench;) 48