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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBenchmark.h"
#include "SkBlurImageFilter.h"
#include "SkMergeImageFilter.h"
#include "SkCanvas.h"
enum { kNumInputs = 5 };
// Exercise a blur filter connected to 5 inputs of the same merge filter.
// This bench shows an improvement in performance once cacheing of re-used
// nodes is implemented, since the DAG is no longer flattened to a tree.
class ImageFilterDAGBench : public SkBenchmark {
public:
ImageFilterDAGBench() {
}
protected:
virtual const char* onGetName() SK_OVERRIDE {
return "image_filter_dag";
}
virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(20.0f, 20.0f));
SkImageFilter* inputs[kNumInputs];
for (int i = 0; i < kNumInputs; ++i) {
inputs[i] = blur.get();
}
SkAutoTUnref<SkImageFilter> merge(SkMergeImageFilter::Create(inputs, kNumInputs));
SkPaint paint;
paint.setImageFilter(merge);
SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
canvas->drawRect(rect, paint);
}
private:
typedef SkBenchmark INHERITED;
};
DEF_BENCH(return new ImageFilterDAGBench;)
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