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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 "Benchmark.h"
#include "SkBlurImageFilter.h"
#include "SkDisplacementMapEffect.h"
#include "SkCanvas.h"
#include "SkMergeImageFilter.h"
// 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 Benchmark {
public:
ImageFilterDAGBench() {}
protected:
const char* onGetName() override {
return "image_filter_dag";
}
void onDraw(int loops, SkCanvas* canvas) override {
const SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
for (int j = 0; j < loops; j++) {
sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(20.0f, 20.0f, nullptr));
sk_sp<SkImageFilter> inputs[kNumInputs];
for (int i = 0; i < kNumInputs; ++i) {
inputs[i] = blur;
}
SkPaint paint;
paint.setImageFilter(SkMergeImageFilter::Make(inputs, kNumInputs));
canvas->drawRect(rect, paint);
}
}
private:
static const int kNumInputs = 5;
typedef Benchmark INHERITED;
};
// Exercise a blur filter connected to both inputs of an SkDisplacementMapEffect.
class ImageFilterDisplacedBlur : public Benchmark {
public:
ImageFilterDisplacedBlur() {}
protected:
const char* onGetName() override {
return "image_filter_displaced_blur";
}
void onDraw(int loops, SkCanvas* canvas) override {
for (int j = 0; j < loops; j++) {
sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(4.0f, 4.0f, nullptr));
auto xSelector = SkDisplacementMapEffect::kR_ChannelSelectorType;
auto ySelector = SkDisplacementMapEffect::kB_ChannelSelectorType;
SkScalar scale = 2;
SkPaint paint;
paint.setImageFilter(SkDisplacementMapEffect::Make(xSelector, ySelector, scale,
blur, blur));
SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
canvas->drawRect(rect, paint);
}
}
private:
typedef Benchmark INHERITED;
};
DEF_BENCH(return new ImageFilterDAGBench;)
DEF_BENCH(return new ImageFilterDisplacedBlur;)
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