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/*
* Copyright 2013 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 "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkLayerDrawLooper.h"
#include "SkPaint.h"
#include "SkRandom.h"
// This bench replicates a problematic use case of a draw looper used
// to create an inner blurred rect
class RectoriBench : public Benchmark {
public:
RectoriBench() {}
protected:
virtual const char* onGetName() {
return "rectori";
}
virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
SkRandom Random;
for (int i = 0; i < loops; i++) {
SkScalar blurSigma = Random.nextRangeScalar(1.5f, 25.0f);
SkScalar size = Random.nextRangeScalar(20*blurSigma, 50*blurSigma);
SkScalar x = Random.nextRangeScalar(0.0f, W - size);
SkScalar y = Random.nextRangeScalar(0.0f, H - size);
SkRect inner = { x, y, x + size, y + size };
SkRect outer(inner);
// outer is always outset either 2x or 4x the blur radius (we go with 2x)
outer.outset(2*blurSigma, 2*blurSigma);
SkPath p;
p.addRect(outer);
p.addRect(inner);
p.setFillType(SkPath::kEvenOdd_FillType);
// This will be used to translate the normal draw outside the
// clip rect and translate the blurred version back inside
SkScalar translate = 2.0f * size;
SkPaint paint;
paint.setLooper(this->createLooper(-translate, blurSigma))->unref();
paint.setColor(0xff000000 | Random.nextU());
paint.setAntiAlias(true);
canvas->save();
// clip always equals inner rect so we get the inside blur
canvas->clipRect(inner);
canvas->translate(translate, 0);
canvas->drawPath(p, paint);
canvas->restore();
}
}
private:
enum {
W = 640,
H = 480,
};
SkLayerDrawLooper* createLooper(SkScalar xOff, SkScalar sigma) {
SkLayerDrawLooper::Builder looperBuilder;
//-----------------------------------------------
SkLayerDrawLooper::LayerInfo info;
// TODO: add a color filter to better match what is seen in the wild
info.fPaintBits = /* SkLayerDrawLooper::kColorFilter_Bit |*/
SkLayerDrawLooper::kMaskFilter_Bit;
info.fColorMode = SkXfermode::kDst_Mode;
info.fOffset.set(xOff, 0);
info.fPostTranslate = false;
SkPaint* paint = looperBuilder.addLayer(info);
SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
sigma,
SkBlurMaskFilter::kHighQuality_BlurFlag);
paint->setMaskFilter(mf)->unref();
//-----------------------------------------------
info.fPaintBits = 0;
info.fOffset.set(0, 0);
paint = looperBuilder.addLayer(info);
return looperBuilder.detachLooper();
}
typedef Benchmark INHERITED;
};
DEF_BENCH( return SkNEW_ARGS(RectoriBench, ()); )
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