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)
26        : fName("blurroundrect"), fWidth(width), fHeight(height) {
27        fName.appendf("-WH-%ix%i-unevenCorners", width,  height);
28    }
29
30    SkString onShortName() override {
31        return fName;
32    }
33
34    SkISize onISize() override {
35        return SkISize::Make(fWidth, fHeight);
36    }
37
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
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 = SkXfermode::kSrc_Mode;
55            info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
56            info.fPostTranslate = false;
57            SkPaint* paint = looperBuilder.addLayerOnTop(info);
58            SkMaskFilter* maskFilter = SkBlurMaskFilter::Create(
59                    kNormal_SkBlurStyle,
60                    SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
61                    SkBlurMaskFilter::kHighQuality_BlurFlag);
62            paint->setMaskFilter(maskFilter)->unref();
63            SkColorFilter* colorFilter = SkColorFilter::CreateModeFilter(
64                    sk_tool_utils::color_to_565(SK_ColorLTGRAY),
65                    SkXfermode::kSrcIn_Mode);
66            paint->setColorFilter(colorFilter)->unref();
67            paint->setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
68        }
69        {
70            SkLayerDrawLooper::LayerInfo info;
71            looperBuilder.addLayerOnTop(info);
72        }
73        SkPaint paint;
74        canvas->drawRect(fRRect.rect(), paint);
75
76        paint.setLooper(looperBuilder.detachLooper())->unref();
77        paint.setColor(SK_ColorCYAN);
78        paint.setAntiAlias(true);
79
80        canvas->drawRRect(fRRect, paint);
81    }
82
83private:
84    SkString        fName;
85    SkRRect         fRRect;
86    int             fWidth, fHeight;
87
88    typedef skiagm::GM INHERITED;
89};
90
91#include "SkGradientShader.h"
92/*
93 * Spits out a dummy gradient to test blur with shader on paint
94 */
95static SkShader* MakeRadial() {
96    SkPoint pts[2] = {
97        { 0, 0 },
98        { SkIntToScalar(100), SkIntToScalar(100) }
99    };
100    SkShader::TileMode tm = SkShader::kClamp_TileMode;
101    const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, };
102    const SkScalar pos[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
103    SkMatrix scale;
104    scale.setScale(0.5f, 0.5f);
105    scale.postTranslate(5.f, 5.f);
106    SkPoint center0, center1;
107    center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
108                SkScalarAve(pts[0].fY, pts[1].fY));
109    center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
110                SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
111    return SkGradientShader::CreateTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
112                                                   center0, (pts[1].fX - pts[0].fX) / 2,
113                                                   colors, pos, SK_ARRAY_COUNT(colors), tm,
114                                                   0, &scale);
115}
116
117// Simpler blurred RR test cases where all the radii are the same.
118class SimpleBlurRoundRectGM : public skiagm::GM {
119public:
120    SimpleBlurRoundRectGM()
121        : fName("simpleblurroundrect") {
122    }
123
124protected:
125
126    SkString onShortName() override {
127        return fName;
128    }
129
130    SkISize onISize() override {
131        return SkISize::Make(1000, 500);
132    }
133
134    void onDraw(SkCanvas* canvas) override {
135        canvas->scale(1.5f, 1.5f);
136        canvas->translate(50,50);
137
138        const float blurRadii[] = { 1,5,10,20 };
139        const int cornerRadii[] = { 1,5,10,20 };
140        const SkRect r = SkRect::MakeWH(SkIntToScalar(25), SkIntToScalar(25));
141        for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
142            SkAutoCanvasRestore autoRestore(canvas, true);
143            canvas->translate(0, (r.height() + SkIntToScalar(50)) * i);
144            for (size_t j = 0; j < SK_ARRAY_COUNT(cornerRadii); ++j) {
145                for (int k = 0; k <= 1; k++) {
146                    SkMaskFilter* filter = SkBlurMaskFilter::Create(
147                        kNormal_SkBlurStyle,
148                        SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
149                        SkBlurMaskFilter::kHighQuality_BlurFlag);
150                    SkPaint paint;
151                    paint.setColor(SK_ColorBLACK);
152                    paint.setMaskFilter(filter)->unref();
153
154                    bool useRadial = SkToBool(k);
155                    if (useRadial) {
156                        paint.setShader(MakeRadial())->unref();
157                    }
158
159                    SkRRect rrect;
160                    rrect.setRectXY(r, SkIntToScalar(cornerRadii[j]),
161                                    SkIntToScalar(cornerRadii[j]));
162                    canvas->drawRRect(rrect, paint);
163                    canvas->translate(r.width() + SkIntToScalar(50), 0);
164                }
165            }
166        }
167    }
168private:
169    const SkString  fName;
170
171    typedef         skiagm::GM INHERITED;
172};
173
174// Create one with dimensions/rounded corners based on the skp
175//
176// TODO(scroggo): Disabled in an attempt to rememdy
177// https://code.google.com/p/skia/issues/detail?id=1801 ('Win7 Test bots all failing GenerateGMs:
178// ran wrong number of tests')
179//DEF_GM(return new BlurRoundRectGM(600, 5514, 6);)
180
181// Rounded rect with two opposite corners with large radii, the other two
182// small.
183DEF_GM(return new BlurRoundRectGM(100, 100);)
184
185DEF_GM(return new SimpleBlurRoundRectGM();)
186