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robertphillips@google.com1d2f6312013-05-13 14:10:31 +00001/*
2 * Copyright 2013 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 "SkBenchmark.h"
9#include "SkCanvas.h"
10#include "SkPaint.h"
11#include "SkRandom.h"
12#include "SkBlurMaskFilter.h"
13#include "SkLayerDrawLooper.h"
14
15// This bench replicates a problematic use case of a draw looper used
16// to create an inner blurred rect
17class RectoriBench : public SkBenchmark {
18public:
19 RectoriBench(void* param) : INHERITED(param) {}
20
21protected:
22
23 virtual const char* onGetName() {
24 return "rectori";
25 }
26
27 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
28 SkMWCRandom Random;
29
30 for (int i = 0; i < N; i++) {
31 SkScalar blurRad = Random.nextRangeScalar(1.5f, 25.0f);
32 SkScalar size = Random.nextRangeScalar(20*blurRad, 50*blurRad);
33
34 SkScalar x = Random.nextRangeScalar(0.0f, W - size);
35 SkScalar y = Random.nextRangeScalar(0.0f, H - size);
36
37 SkRect inner = { x, y, x + size, y + size };
38
39 SkRect outer(inner);
40 // outer is always outset either 2x or 4x the blur radius (we go with 2x)
robertphillips@google.com63a3f6f2013-05-13 14:40:34 +000041 outer.outset(2*blurRad, 2*blurRad);
robertphillips@google.com1d2f6312013-05-13 14:10:31 +000042
43 SkPath p;
44
45 p.addRect(outer);
46 p.addRect(inner);
47 p.setFillType(SkPath::kEvenOdd_FillType);
48
49 // This will be used to translate the normal draw outside the
50 // clip rect and translate the blurred version back inside
51 SkScalar translate = 2.0f * size;
52
53 SkPaint paint;
54 paint.setLooper(this->createLooper(-translate, blurRad))->unref();
55 paint.setColor(0xff000000 | Random.nextU());
56 paint.setAntiAlias(true);
57
58 canvas->save();
59 // clip always equals inner rect so we get the inside blur
60 canvas->clipRect(inner);
61 canvas->translate(translate, 0);
62 canvas->drawPath(p, paint);
63 canvas->restore();
64 }
65 }
66
67private:
68 enum {
69 W = 640,
70 H = 480,
71 };
72
73 enum { N = SkBENCHLOOP(100) };
74
75 SkLayerDrawLooper* createLooper(SkScalar xOff, SkScalar radius) {
76 SkLayerDrawLooper* looper = new SkLayerDrawLooper;
77
78 //-----------------------------------------------
79 SkLayerDrawLooper::LayerInfo info;
80
81 info.fFlagsMask = 0;
82 // TODO: add a color filter to better match what is seen in the wild
skia.committer@gmail.com0431b872013-05-14 07:01:11 +000083 info.fPaintBits = /* SkLayerDrawLooper::kColorFilter_Bit |*/
robertphillips@google.com1d2f6312013-05-13 14:10:31 +000084 SkLayerDrawLooper::kMaskFilter_Bit;
85 info.fColorMode = SkXfermode::kDst_Mode;
86 info.fOffset.set(xOff, 0);
87 info.fPostTranslate = false;
88
89 SkPaint* paint = looper->addLayer(info);
90
robertphillips@google.com63a3f6f2013-05-13 14:40:34 +000091 SkMaskFilter* mf = SkBlurMaskFilter::Create(radius,
robertphillips@google.com1d2f6312013-05-13 14:10:31 +000092 SkBlurMaskFilter::kNormal_BlurStyle,
93 SkBlurMaskFilter::kHighQuality_BlurFlag);
94 paint->setMaskFilter(mf)->unref();
95
96 //-----------------------------------------------
97 info.fPaintBits = 0;
98 info.fOffset.set(0, 0);
99
100 paint = looper->addLayer(info);
101 return looper;
102 }
103
104 typedef SkBenchmark INHERITED;
105};
106
107
108DEF_BENCH( return SkNEW_ARGS(RectoriBench, (p)); )