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