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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 "sk_tool_utils.h"
10 #include "SkBlurMask.h"
11 #include "SkBlurMaskFilter.h"
12 #include "SkCanvas.h"
13 #include "SkColorFilter.h"
14 #include "SkLayerDrawLooper.h"
15 #include "SkPaint.h"
16 #include "SkPath.h"
17 #include "SkPoint.h"
18 #include "SkRect.h"
19 #include "SkRRect.h"
20 #include "SkString.h"
21 
22 // This GM mimics a blurred RR seen in the wild.
23 class BlurRoundRectGM : public skiagm::GM {
24 public:
BlurRoundRectGM(int width,int height)25     BlurRoundRectGM(int width, int height)
26         : fName("blurroundrect"), fWidth(width), fHeight(height) {
27         fName.appendf("-WH-%ix%i-unevenCorners", width,  height);
28     }
29 
onShortName()30     SkString onShortName() override {
31         return fName;
32     }
33 
onISize()34     SkISize onISize() override {
35         return SkISize::Make(fWidth, fHeight);
36     }
37 
onOnceBeforeDraw()38     void onOnceBeforeDraw() override {
39         SkVector radii[4];
40         radii[0].set(SkIntToScalar(30), SkIntToScalar(30));
41         radii[1].set(SkIntToScalar(10), SkIntToScalar(10));
42         radii[2].set(SkIntToScalar(30), SkIntToScalar(30));
43         radii[3].set(SkIntToScalar(10), SkIntToScalar(10));
44         SkRect r = SkRect::MakeWH(SkIntToScalar(fWidth), SkIntToScalar(fHeight));
45         fRRect.setRectRadii(r, radii);
46     }
47 
onDraw(SkCanvas * canvas)48     void onDraw(SkCanvas* canvas) override {
49         SkLayerDrawLooper::Builder looperBuilder;
50         {
51             SkLayerDrawLooper::LayerInfo info;
52             info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
53                               | SkLayerDrawLooper::kColorFilter_Bit;
54             info.fColorMode = SkBlendMode::kSrc;
55             info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
56             info.fPostTranslate = false;
57             SkPaint* paint = looperBuilder.addLayerOnTop(info);
58             paint->setMaskFilter(SkBlurMaskFilter::Make(
59                     kNormal_SkBlurStyle,
60                     SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
61                     SkBlurMaskFilter::kHighQuality_BlurFlag));
62             paint->setColorFilter(SkColorFilter::MakeModeFilter(
63                     sk_tool_utils::color_to_565(SK_ColorLTGRAY),
64                     SkBlendMode::kSrcIn));
65             paint->setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
66         }
67         {
68             SkLayerDrawLooper::LayerInfo info;
69             looperBuilder.addLayerOnTop(info);
70         }
71         SkPaint paint;
72         canvas->drawRect(fRRect.rect(), paint);
73 
74         paint.setLooper(looperBuilder.detach());
75         paint.setColor(SK_ColorCYAN);
76         paint.setAntiAlias(true);
77 
78         canvas->drawRRect(fRRect, paint);
79     }
80 
81 private:
82     SkString        fName;
83     SkRRect         fRRect;
84     int             fWidth, fHeight;
85 
86     typedef skiagm::GM INHERITED;
87 };
88 
89 #include "SkGradientShader.h"
90 /*
91  * Spits out a dummy gradient to test blur with shader on paint
92  */
MakeRadial()93 static sk_sp<SkShader> MakeRadial() {
94     SkPoint pts[2] = {
95         { 0, 0 },
96         { SkIntToScalar(100), SkIntToScalar(100) }
97     };
98     SkShader::TileMode tm = SkShader::kClamp_TileMode;
99     const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, };
100     const SkScalar pos[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
101     SkMatrix scale;
102     scale.setScale(0.5f, 0.5f);
103     scale.postTranslate(5.f, 5.f);
104     SkPoint center0, center1;
105     center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
106                 SkScalarAve(pts[0].fY, pts[1].fY));
107     center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
108                 SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
109     return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
110                                                  center0, (pts[1].fX - pts[0].fX) / 2,
111                                                  colors, pos, SK_ARRAY_COUNT(colors), tm,
112                                                  0, &scale);
113 }
114 
115 // Simpler blurred RR test cases where all the radii are the same.
116 class SimpleBlurRoundRectGM : public skiagm::GM {
117 public:
SimpleBlurRoundRectGM()118     SimpleBlurRoundRectGM()
119         : fName("simpleblurroundrect") {
120     }
121 
122 protected:
123 
onShortName()124     SkString onShortName() override {
125         return fName;
126     }
127 
onISize()128     SkISize onISize() override {
129         return SkISize::Make(1000, 500);
130     }
131 
onDraw(SkCanvas * canvas)132     void onDraw(SkCanvas* canvas) override {
133         canvas->scale(1.5f, 1.5f);
134         canvas->translate(50,50);
135 
136         const float blurRadii[] = { 1,5,10,20 };
137         const int cornerRadii[] = { 1,5,10,20 };
138         const SkRect r = SkRect::MakeWH(SkIntToScalar(25), SkIntToScalar(25));
139         for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
140             SkAutoCanvasRestore autoRestore(canvas, true);
141             canvas->translate(0, (r.height() + SkIntToScalar(50)) * i);
142             for (size_t j = 0; j < SK_ARRAY_COUNT(cornerRadii); ++j) {
143                 for (int k = 0; k <= 1; k++) {
144                     SkPaint paint;
145                     paint.setColor(SK_ColorBLACK);
146                     paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
147                                    SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
148                                    SkBlurMaskFilter::kHighQuality_BlurFlag));
149 
150                     bool useRadial = SkToBool(k);
151                     if (useRadial) {
152                         paint.setShader(MakeRadial());
153                     }
154 
155                     SkRRect rrect;
156                     rrect.setRectXY(r, SkIntToScalar(cornerRadii[j]),
157                                     SkIntToScalar(cornerRadii[j]));
158                     canvas->drawRRect(rrect, paint);
159                     canvas->translate(r.width() + SkIntToScalar(50), 0);
160                 }
161             }
162         }
163     }
164 private:
165     const SkString  fName;
166 
167     typedef         skiagm::GM INHERITED;
168 };
169 
170 // Create one with dimensions/rounded corners based on the skp
171 //
172 // TODO(scroggo): Disabled in an attempt to rememdy
173 // https://code.google.com/p/skia/issues/detail?id=1801 ('Win7 Test bots all failing GenerateGMs:
174 // ran wrong number of tests')
175 //DEF_GM(return new BlurRoundRectGM(600, 5514, 6);)
176 
177 // Rounded rect with two opposite corners with large radii, the other two
178 // small.
179 DEF_GM(return new BlurRoundRectGM(100, 100);)
180 
181 DEF_GM(return new SimpleBlurRoundRectGM();)
182