blurroundrect.cpp revision 8610d2cdbdcc0e1cf28f9a1ffea0ebab53a33485 
1/*
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 "gm.h"
9#include "SkBlurMask.h"
10#include "SkBlurMaskFilter.h"
11#include "SkCanvas.h"
12#include "SkColorFilter.h"
13#include "SkLayerDrawLooper.h"
14#include "SkPaint.h"
15#include "SkPath.h"
16#include "SkPoint.h"
17#include "SkRect.h"
18#include "SkRRect.h"
19#include "SkString.h"
20#include "SkXfermode.h"
21
22// This GM mimics a blurred RR seen in the wild.
23class BlurRoundRectGM : public skiagm::GM {
24public:
25    BlurRoundRectGM(int width, int height, int radius)
26        : fName("blurroundrect")
27    {
28        SkRect r = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
29        fRRect.setRectXY(r, SkIntToScalar(radius), SkIntToScalar(radius));
30        fName.appendf("-WH[%ix%i]-corner[%i]", width, height, radius);
31    }
32
33    BlurRoundRectGM(int width, int height)
34        : fName("blurroundrect") {
35        fName.appendf("-WH[%ix%i]-unevenCorners",
36                      width,  height);
37        SkVector radii[4];
38        radii[0].set(SkIntToScalar(30), SkIntToScalar(30));
39        radii[1].set(SkIntToScalar(10), SkIntToScalar(10));
40        radii[2].set(SkIntToScalar(30), SkIntToScalar(30));
41        radii[3].set(SkIntToScalar(10), SkIntToScalar(10));
42        SkRect r = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
43        fRRect.setRectRadii(r, radii);
44    }
45
46    virtual SkString onShortName() SK_OVERRIDE {
47        return fName;
48    }
49
50    virtual SkISize onISize() SK_OVERRIDE {
51        return SkISize::Make(SkScalarCeilToInt(fRRect.rect().width()),
52                             SkScalarCeilToInt(fRRect.rect().height()));
53    }
54
55    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
56        SkLayerDrawLooper* looper = new SkLayerDrawLooper;
57        {
58            SkLayerDrawLooper::LayerInfo info;
59            info.fFlagsMask = 0;
60            info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
61                              | SkLayerDrawLooper::kColorFilter_Bit;
62            info.fColorMode = SkXfermode::kSrc_Mode;
63            info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
64            info.fPostTranslate = false;
65            SkPaint* paint = looper->addLayerOnTop(info);
66            SkMaskFilter* maskFilter = SkBlurMaskFilter::Create(SK_ScalarHalf,
67                    SkBlurMaskFilter::kNormal_BlurStyle,
68                    SkBlurMaskFilter::kHighQuality_BlurFlag);
69            paint->setMaskFilter(maskFilter)->unref();
70            SkColorFilter* colorFilter = SkColorFilter::CreateModeFilter(SK_ColorLTGRAY,
71                    SkXfermode::kSrcIn_Mode);
72            paint->setColorFilter(colorFilter)->unref();
73            paint->setColor(SK_ColorGRAY);
74        }
75        {
76            SkLayerDrawLooper::LayerInfo info;
77            looper->addLayerOnTop(info);
78        }
79        SkPaint paint;
80        canvas->drawRect(fRRect.rect(), paint);
81
82        paint.setLooper(looper)->unref();
83        paint.setColor(SK_ColorCYAN);
84        paint.setAntiAlias(true);
85
86        canvas->drawRRect(fRRect, paint);
87    }
88
89private:
90    SkString        fName;
91    SkRRect         fRRect;
92
93    typedef skiagm::GM INHERITED;
94};
95
96// Simpler blurred RR test cases where all the radii are the same.
97class SimpleBlurRoundRectGM : public skiagm::GM {
98public:
99    SimpleBlurRoundRectGM()
100        : fName("simpleblurroundrect") {
101    }
102
103protected:
104    virtual SkString onShortName() SK_OVERRIDE {
105        return fName;
106    }
107
108    virtual SkISize onISize() SK_OVERRIDE {
109        return SkISize::Make(SkIntToScalar(750), SkIntToScalar(750));
110    }
111
112    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
113        canvas->scale(SkFloatToScalar(1.5f), SkFloatToScalar(1.5f));
114
115        const int blurRadii[] = { 1, 3, 6, 10 };
116        const int cornerRadii[] = { 1, 3, 6, 10 };
117        const SkRect r = SkRect::MakeWH(SkIntToScalar(100), SkIntToScalar(100));
118        for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
119            SkAutoCanvasRestore autoRestore(canvas, true);
120            canvas->translate(0, (r.height() + SkIntToScalar(20)) * i);
121            for (size_t j = 0; j < SK_ARRAY_COUNT(cornerRadii); ++j) {
122                SkMaskFilter* filter = SkBlurMaskFilter::Create(SkIntToScalar(blurRadii[i]),
123                                            SkBlurMaskFilter::kNormal_BlurStyle);
124                SkPaint paint;
125                paint.setColor(SK_ColorBLUE);
126                paint.setMaskFilter(filter)->unref();
127
128                SkRRect rrect;
129                rrect.setRectXY(r, SkIntToScalar(cornerRadii[j]), SkIntToScalar(cornerRadii[j]));
130                canvas->drawRRect(rrect, paint);
131                canvas->translate(r.width() + SkIntToScalar(10), 0);
132            }
133        }
134    }
135private:
136    const SkString  fName;
137
138    typedef         skiagm::GM INHERITED;
139};
140
141// Create one with dimensions/rounded corners based on the skp
142DEF_GM(return new BlurRoundRectGM(600, 5514, 6);)
143// Rounded rect with two opposite corners with large radii, the other two
144// small.
145DEF_GM(return new BlurRoundRectGM(100, 100);)
146
147DEF_GM(return new SimpleBlurRoundRectGM();)
148
149