1
2/*
3 * Copyright 2013 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9#include "gm.h"
10#include "SkTArray.h"
11#include "SkRandom.h"
12#include "SkMatrix.h"
13#include "SkBlurMaskFilter.h"
14#include "SkGradientShader.h"
15#include "SkBlurDrawLooper.h"
16#include "SkRect.h"
17#include "SkRRect.h"
18
19namespace skiagm {
20
21class RoundRectGM : public GM {
22public:
23    RoundRectGM() {
24        this->setBGColor(0xFF000000);
25        this->makePaints();
26        this->makeMatrices();
27    }
28
29protected:
30    virtual uint32_t onGetFlags() const SK_OVERRIDE {
31        return kSkipTiled_Flag;
32    }
33
34    virtual SkString onShortName() SK_OVERRIDE {
35        return SkString("roundrects");
36    }
37
38    virtual SkISize onISize() SK_OVERRIDE {
39        return SkISize::Make(1200, 900);
40    }
41
42    void makePaints() {
43        {
44        // no AA
45        SkPaint p;
46        fPaints.push_back(p);
47        }
48
49        {
50        // AA
51        SkPaint p;
52        p.setAntiAlias(true);
53        fPaints.push_back(p);
54        }
55
56        {
57        // AA with stroke style
58        SkPaint p;
59        p.setAntiAlias(true);
60        p.setStyle(SkPaint::kStroke_Style);
61        p.setStrokeWidth(SkIntToScalar(5));
62        fPaints.push_back(p);
63        }
64
65        {
66        // AA with stroke style, width = 0
67        SkPaint p;
68        p.setAntiAlias(true);
69        p.setStyle(SkPaint::kStroke_Style);
70        fPaints.push_back(p);
71        }
72
73        {
74        // AA with stroke and fill style
75        SkPaint p;
76        p.setAntiAlias(true);
77        p.setStyle(SkPaint::kStrokeAndFill_Style);
78        p.setStrokeWidth(SkIntToScalar(3));
79        fPaints.push_back(p);
80        }
81    }
82
83    void makeMatrices() {
84        {
85        SkMatrix m;
86        m.setIdentity();
87        fMatrices.push_back(m);
88        }
89
90        {
91        SkMatrix m;
92        m.setScale(SkIntToScalar(3), SkIntToScalar(2));
93        fMatrices.push_back(m);
94        }
95
96        {
97        SkMatrix m;
98        m.setScale(SkIntToScalar(2), SkIntToScalar(2));
99        fMatrices.push_back(m);
100        }
101
102        {
103        SkMatrix m;
104        m.setScale(SkIntToScalar(1), SkIntToScalar(2));
105        fMatrices.push_back(m);
106        }
107
108        {
109        SkMatrix m;
110        m.setScale(SkIntToScalar(4), SkIntToScalar(1));
111        fMatrices.push_back(m);
112        }
113
114        {
115        SkMatrix m;
116        m.setRotate(SkIntToScalar(90));
117        fMatrices.push_back(m);
118        }
119
120        {
121        SkMatrix m;
122        m.setSkew(SkIntToScalar(2), SkIntToScalar(3));
123        fMatrices.push_back(m);
124        }
125
126        {
127        SkMatrix m;
128        m.setRotate(SkIntToScalar(60));
129        fMatrices.push_back(m);
130        }
131    }
132
133    SkColor genColor(SkRandom* rand) {
134        SkScalar hsv[3];
135        hsv[0] = rand->nextRangeF(0.0f, 360.0f);
136        hsv[1] = rand->nextRangeF(0.75f, 1.0f);
137        hsv[2] = rand->nextRangeF(0.75f, 1.0f);
138
139        return SkHSVToColor(hsv);
140    }
141
142    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
143        SkRandom rand(1);
144        canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
145        SkRect rect = SkRect::MakeLTRB(-20, -30, 20, 30);
146        SkRRect circleRect;
147        circleRect.setRectXY(rect, 5, 5);
148
149        const SkScalar kXStart = 60.0f;
150        const SkScalar kYStart = 80.0f;
151        const int kXStep = 150;
152        const int kYStep = 160;
153        int maxX = fMatrices.count();
154
155        SkPaint rectPaint;
156        rectPaint.setAntiAlias(true);
157        rectPaint.setStyle(SkPaint::kStroke_Style);
158        rectPaint.setStrokeWidth(SkIntToScalar(0));
159        rectPaint.setColor(SK_ColorLTGRAY);
160
161        int testCount = 0;
162        for (int i = 0; i < fPaints.count(); ++i) {
163            for (int j = 0; j < fMatrices.count(); ++j) {
164                canvas->save();
165                SkMatrix mat = fMatrices[j];
166                // position the roundrect, and make it at off-integer coords.
167                mat.postTranslate(kXStart + SK_Scalar1 * kXStep * (testCount % maxX) +
168                                  SK_Scalar1 / 4,
169                                  kYStart + SK_Scalar1 * kYStep * (testCount / maxX) +
170                                  3 * SK_Scalar1 / 4);
171                canvas->concat(mat);
172
173                SkColor color = genColor(&rand);
174                fPaints[i].setColor(color);
175
176                canvas->drawRect(rect, rectPaint);
177                canvas->drawRRect(circleRect, fPaints[i]);
178
179                canvas->restore();
180
181                ++testCount;
182            }
183        }
184
185        // special cases
186
187        // non-scaled tall and skinny roundrect
188        for (int i = 0; i < fPaints.count(); ++i) {
189            SkRect rect = SkRect::MakeLTRB(-20, -60, 20, 60);
190            SkRRect ellipseRect;
191            ellipseRect.setRectXY(rect, 5, 10);
192
193            canvas->save();
194            // position the roundrect, and make it at off-integer coords.
195            canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.55f + SK_Scalar1 / 4,
196                              kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4);
197
198            SkColor color = genColor(&rand);
199            fPaints[i].setColor(color);
200
201            canvas->drawRect(rect, rectPaint);
202            canvas->drawRRect(ellipseRect, fPaints[i]);
203            canvas->restore();
204        }
205
206        // non-scaled wide and short roundrect
207        for (int i = 0; i < fPaints.count(); ++i) {
208            SkRect rect = SkRect::MakeLTRB(-80, -30, 80, 30);
209            SkRRect ellipseRect;
210            ellipseRect.setRectXY(rect, 20, 5);
211
212            canvas->save();
213            // position the roundrect, and make it at off-integer coords.
214            canvas->translate(kXStart + SK_Scalar1 * kXStep * 4 + SK_Scalar1 / 4,
215                              kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
216                              SK_ScalarHalf * kYStep);
217
218            SkColor color = genColor(&rand);
219            fPaints[i].setColor(color);
220
221            canvas->drawRect(rect, rectPaint);
222            canvas->drawRRect(ellipseRect, fPaints[i]);
223            canvas->restore();
224        }
225
226        // super skinny roundrect
227        for (int i = 0; i < fPaints.count(); ++i) {
228            SkRect rect = SkRect::MakeLTRB(0, -60, 1, 60);
229            SkRRect circleRect;
230            circleRect.setRectXY(rect, 5, 5);
231
232            canvas->save();
233            // position the roundrect, and make it at off-integer coords.
234            canvas->translate(kXStart + SK_Scalar1 * kXStep * 3.25f + SK_Scalar1 / 4,
235                              kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4);
236
237            SkColor color = genColor(&rand);
238            fPaints[i].setColor(color);
239
240            canvas->drawRRect(circleRect, fPaints[i]);
241            canvas->restore();
242        }
243
244        // super short roundrect
245        for (int i = 0; i < fPaints.count(); ++i) {
246            SkRect rect = SkRect::MakeLTRB(-80, -1, 80, 0);
247            SkRRect circleRect;
248            circleRect.setRectXY(rect, 5, 5);
249
250            canvas->save();
251            // position the roundrect, and make it at off-integer coords.
252            canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.5f + SK_Scalar1 / 4,
253                              kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
254                              SK_ScalarHalf * kYStep);
255
256            SkColor color = genColor(&rand);
257            fPaints[i].setColor(color);
258
259            canvas->drawRRect(circleRect, fPaints[i]);
260            canvas->restore();
261        }
262
263        // radial gradient
264        SkPoint center = SkPoint::Make(SkIntToScalar(0), SkIntToScalar(0));
265        SkColor colors[] = { SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN };
266        SkScalar pos[] = { 0, SK_ScalarHalf, SK_Scalar1 };
267        SkAutoTUnref<SkShader> shader(SkGradientShader::CreateRadial(center,
268                                                     SkIntToScalar(20),
269                                                     colors,
270                                                     pos,
271                                                     SK_ARRAY_COUNT(colors),
272                                                     SkShader::kClamp_TileMode));
273
274        for (int i = 0; i < fPaints.count(); ++i) {
275            canvas->save();
276            // position the path, and make it at off-integer coords.
277            canvas->translate(kXStart + SK_Scalar1 * kXStep * 0 + SK_Scalar1 / 4,
278                              kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
279                              SK_ScalarHalf * kYStep);
280
281            SkColor color = genColor(&rand);
282            fPaints[i].setColor(color);
283            fPaints[i].setShader(shader);
284
285            canvas->drawRect(rect, rectPaint);
286            canvas->drawRRect(circleRect, fPaints[i]);
287
288            fPaints[i].setShader(NULL);
289
290            canvas->restore();
291        }
292
293        // strokes and radii
294        {
295            SkScalar radii[][2] = {
296                {10,10},
297                {5,15},
298                {5,15},
299                {5,15}
300            };
301
302            SkScalar strokeWidths[] = {
303                20, 10, 20, 40
304            };
305
306            for (int i = 0; i < 4; ++i) {
307                SkRRect circleRect;
308                circleRect.setRectXY(rect, radii[i][0], radii[i][1]);
309
310                canvas->save();
311                // position the roundrect, and make it at off-integer coords.
312                canvas->translate(kXStart + SK_Scalar1 * kXStep * 5 + SK_Scalar1 / 4,
313                                  kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
314                                  SK_ScalarHalf * kYStep);
315
316                SkColor color = genColor(&rand);
317
318                SkPaint p;
319                p.setAntiAlias(true);
320                p.setStyle(SkPaint::kStroke_Style);
321                p.setStrokeWidth(strokeWidths[i]);
322                p.setColor(color);
323
324                canvas->drawRRect(circleRect, p);
325                canvas->restore();
326            }
327        }
328
329    }
330
331private:
332    SkTArray<SkPaint> fPaints;
333    SkTArray<SkMatrix> fMatrices;
334
335    typedef GM INHERITED;
336};
337
338//////////////////////////////////////////////////////////////////////////////
339
340static GM* MyFactory(void*) { return new RoundRectGM; }
341static GMRegistry reg(MyFactory);
342
343}
344