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", width,  height);
36        SkVector radii[4];
37        radii[0].set(SkIntToScalar(30), SkIntToScalar(30));
38        radii[1].set(SkIntToScalar(10), SkIntToScalar(10));
39        radii[2].set(SkIntToScalar(30), SkIntToScalar(30));
40        radii[3].set(SkIntToScalar(10), SkIntToScalar(10));
41        SkRect r = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
42        fRRect.setRectRadii(r, radii);
43    }
44
45    SkString onShortName() override {
46        return fName;
47    }
48
49    SkISize onISize() override {
50        return SkISize::Make(SkScalarCeilToInt(fRRect.rect().width()),
51                             SkScalarCeilToInt(fRRect.rect().height()));
52    }
53
54    void onDraw(SkCanvas* canvas) override {
55        SkLayerDrawLooper::Builder looperBuilder;
56        {
57            SkLayerDrawLooper::LayerInfo info;
58            info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
59                              | SkLayerDrawLooper::kColorFilter_Bit;
60            info.fColorMode = SkXfermode::kSrc_Mode;
61            info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
62            info.fPostTranslate = false;
63            SkPaint* paint = looperBuilder.addLayerOnTop(info);
64            SkMaskFilter* maskFilter = SkBlurMaskFilter::Create(
65                    kNormal_SkBlurStyle,
66                    SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
67                    SkBlurMaskFilter::kHighQuality_BlurFlag);
68            paint->setMaskFilter(maskFilter)->unref();
69            SkColorFilter* colorFilter = SkColorFilter::CreateModeFilter(SK_ColorLTGRAY,
70                    SkXfermode::kSrcIn_Mode);
71            paint->setColorFilter(colorFilter)->unref();
72            paint->setColor(SK_ColorGRAY);
73        }
74        {
75            SkLayerDrawLooper::LayerInfo info;
76            looperBuilder.addLayerOnTop(info);
77        }
78        SkPaint paint;
79        canvas->drawRect(fRRect.rect(), paint);
80
81        paint.setLooper(looperBuilder.detachLooper())->unref();
82        paint.setColor(SK_ColorCYAN);
83        paint.setAntiAlias(true);
84
85        canvas->drawRRect(fRRect, paint);
86    }
87
88private:
89    SkString        fName;
90    SkRRect         fRRect;
91
92    typedef skiagm::GM INHERITED;
93};
94
95#include "SkGradientShader.h"
96/*
97 * Spits out a dummy gradient to test blur with shader on paint
98 */
99static SkShader* MakeRadial() {
100    SkPoint pts[2] = {
101        { 0, 0 },
102        { SkIntToScalar(100), SkIntToScalar(100) }
103    };
104    SkShader::TileMode tm = SkShader::kClamp_TileMode;
105    const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, };
106    const SkScalar pos[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
107    SkMatrix scale;
108    scale.setScale(0.5f, 0.5f);
109    scale.postTranslate(5.f, 5.f);
110    SkPoint center0, center1;
111    center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
112                SkScalarAve(pts[0].fY, pts[1].fY));
113    center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
114                SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
115    return SkGradientShader::CreateTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
116                                                   center0, (pts[1].fX - pts[0].fX) / 2,
117                                                   colors, pos, SK_ARRAY_COUNT(colors), tm,
118                                                   0, &scale);
119}
120
121// Simpler blurred RR test cases where all the radii are the same.
122class SimpleBlurRoundRectGM : public skiagm::GM {
123public:
124    SimpleBlurRoundRectGM()
125        : fName("simpleblurroundrect") {
126    }
127
128protected:
129
130    SkString onShortName() override {
131        return fName;
132    }
133
134    SkISize onISize() override {
135        return SkISize::Make(1000, 500);
136    }
137
138    void onDraw(SkCanvas* canvas) override {
139        canvas->scale(1.5f, 1.5f);
140        canvas->translate(50,50);
141
142        const float blurRadii[] = { 1,5,10,20 };
143        const int cornerRadii[] = { 1,5,10,20 };
144        const SkRect r = SkRect::MakeWH(SkIntToScalar(25), SkIntToScalar(25));
145        for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
146            SkAutoCanvasRestore autoRestore(canvas, true);
147            canvas->translate(0, (r.height() + SkIntToScalar(50)) * i);
148            for (size_t j = 0; j < SK_ARRAY_COUNT(cornerRadii); ++j) {
149                for (int k = 0; k <= 1; k++) {
150                    SkMaskFilter* filter = SkBlurMaskFilter::Create(
151                        kNormal_SkBlurStyle,
152                        SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
153                        SkBlurMaskFilter::kHighQuality_BlurFlag);
154                    SkPaint paint;
155                    paint.setColor(SK_ColorBLACK);
156                    paint.setMaskFilter(filter)->unref();
157
158                    bool useRadial = SkToBool(k);
159                    if (useRadial) {
160                        paint.setShader(MakeRadial())->unref();
161                    }
162
163                    SkRRect rrect;
164                    rrect.setRectXY(r, SkIntToScalar(cornerRadii[j]),
165                                    SkIntToScalar(cornerRadii[j]));
166                    canvas->drawRRect(rrect, paint);
167                    canvas->translate(r.width() + SkIntToScalar(50), 0);
168                }
169            }
170        }
171    }
172private:
173    const SkString  fName;
174
175    typedef         skiagm::GM INHERITED;
176};
177
178// Create one with dimensions/rounded corners based on the skp
179//
180// TODO(scroggo): Disabled in an attempt to rememdy
181// https://code.google.com/p/skia/issues/detail?id=1801 ('Win7 Test bots all failing GenerateGMs:
182// ran wrong number of tests')
183//DEF_GM(return new BlurRoundRectGM(600, 5514, 6);)
184
185// Rounded rect with two opposite corners with large radii, the other two
186// small.
187DEF_GM(return new BlurRoundRectGM(100, 100);)
188
189DEF_GM(return new SimpleBlurRoundRectGM();)
190