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 13 enum { 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 19 class ImageFilterDAGBench : public Benchmark { 20 public: ImageFilterDAGBench()21 ImageFilterDAGBench() { 22 } 23 24 protected: onGetName()25 virtual const char* onGetName() SK_OVERRIDE { 26 return "image_filter_dag"; 27 } 28 onDraw(const int loops,SkCanvas * canvas)29 virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE { 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 private: 43 typedef Benchmark INHERITED; 44 }; 45 46 DEF_BENCH(return new ImageFilterDAGBench;) 47