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1 /*
2  * Copyright 2012 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 "SkCanvas.h"
11 #include "SkPaint.h"
12 #include "SkDashPathEffect.h"
13 
drawline(SkCanvas * canvas,int on,int off,const SkPaint & paint,SkScalar finalX=SkIntToScalar (600),SkScalar finalY=SkIntToScalar (0),SkScalar phase=SkIntToScalar (0),SkScalar startX=SkIntToScalar (0),SkScalar startY=SkIntToScalar (0))14 static void drawline(SkCanvas* canvas, int on, int off, const SkPaint& paint,
15                      SkScalar finalX = SkIntToScalar(600), SkScalar finalY = SkIntToScalar(0),
16                      SkScalar phase = SkIntToScalar(0),
17                      SkScalar startX = SkIntToScalar(0), SkScalar startY = SkIntToScalar(0)) {
18     SkPaint p(paint);
19 
20     const SkScalar intervals[] = {
21         SkIntToScalar(on),
22         SkIntToScalar(off),
23     };
24 
25     p.setPathEffect(SkDashPathEffect::Make(intervals, 2, phase));
26     canvas->drawLine(startX, startY, finalX, finalY, p);
27 }
28 
29 // earlier bug stopped us from drawing very long single-segment dashes, because
30 // SkPathMeasure was skipping very small delta-T values (nearlyzero). This is
31 // now fixes, so this giant dash should appear.
show_giant_dash(SkCanvas * canvas)32 static void show_giant_dash(SkCanvas* canvas) {
33     SkPaint paint;
34 
35     drawline(canvas, 1, 1, paint, SkIntToScalar(20 * 1000));
36 }
37 
show_zero_len_dash(SkCanvas * canvas)38 static void show_zero_len_dash(SkCanvas* canvas) {
39     SkPaint paint;
40 
41     drawline(canvas, 2, 2, paint, SkIntToScalar(0));
42     paint.setStyle(SkPaint::kStroke_Style);
43     paint.setStrokeWidth(SkIntToScalar(2));
44     canvas->translate(0, SkIntToScalar(20));
45     drawline(canvas, 4, 4, paint, SkIntToScalar(0));
46 }
47 
48 class DashingGM : public skiagm::GM {
49 public:
DashingGM()50     DashingGM() {}
51 
52 protected:
53 
onShortName()54     SkString onShortName() {
55         return SkString("dashing");
56     }
57 
onISize()58     SkISize onISize() { return SkISize::Make(640, 340); }
59 
onDraw(SkCanvas * canvas)60     virtual void onDraw(SkCanvas* canvas) {
61         constexpr struct {
62             int fOnInterval;
63             int fOffInterval;
64         } gData[] = {
65             { 1, 1 },
66             { 4, 1 },
67         };
68 
69         SkPaint paint;
70         paint.setStyle(SkPaint::kStroke_Style);
71 
72         canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
73         canvas->translate(0, SK_ScalarHalf);
74         for (int width = 0; width <= 2; ++width) {
75             for (size_t data = 0; data < SK_ARRAY_COUNT(gData); ++data) {
76                 for (int aa = 0; aa <= 1; ++aa) {
77                     int w = width * width * width;
78                     paint.setAntiAlias(SkToBool(aa));
79                     paint.setStrokeWidth(SkIntToScalar(w));
80 
81                     int scale = w ? w : 1;
82 
83                     drawline(canvas, gData[data].fOnInterval * scale,
84                              gData[data].fOffInterval * scale,
85                              paint);
86                     canvas->translate(0, SkIntToScalar(20));
87                 }
88             }
89         }
90 
91         show_giant_dash(canvas);
92         canvas->translate(0, SkIntToScalar(20));
93         show_zero_len_dash(canvas);
94         canvas->translate(0, SkIntToScalar(20));
95         // Draw 0 on, 0 off dashed line
96         paint.setStrokeWidth(SkIntToScalar(8));
97         drawline(canvas, 0, 0, paint);
98     }
99 };
100 
101 ///////////////////////////////////////////////////////////////////////////////
102 
make_unit_star(SkPath * path,int n)103 static void make_unit_star(SkPath* path, int n) {
104     SkScalar rad = -SK_ScalarPI / 2;
105     const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
106 
107     path->moveTo(0, -SK_Scalar1);
108     for (int i = 1; i < n; i++) {
109         rad += drad;
110         SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
111         path->lineTo(cosV, sinV);
112     }
113     path->close();
114 }
115 
make_path_line(SkPath * path,const SkRect & bounds)116 static void make_path_line(SkPath* path, const SkRect& bounds) {
117     path->moveTo(bounds.left(), bounds.top());
118     path->lineTo(bounds.right(), bounds.bottom());
119 }
120 
make_path_rect(SkPath * path,const SkRect & bounds)121 static void make_path_rect(SkPath* path, const SkRect& bounds) {
122     path->addRect(bounds);
123 }
124 
make_path_oval(SkPath * path,const SkRect & bounds)125 static void make_path_oval(SkPath* path, const SkRect& bounds) {
126     path->addOval(bounds);
127 }
128 
make_path_star(SkPath * path,const SkRect & bounds)129 static void make_path_star(SkPath* path, const SkRect& bounds) {
130     make_unit_star(path, 5);
131     SkMatrix matrix;
132     matrix.setRectToRect(path->getBounds(), bounds, SkMatrix::kCenter_ScaleToFit);
133     path->transform(matrix);
134 }
135 
136 class Dashing2GM : public skiagm::GM {
137 public:
Dashing2GM()138     Dashing2GM() {}
139 
140 protected:
141 
onShortName()142     SkString onShortName() {
143         return SkString("dashing2");
144     }
145 
onISize()146     SkISize onISize() { return SkISize::Make(640, 480); }
147 
onDraw(SkCanvas * canvas)148     virtual void onDraw(SkCanvas* canvas) {
149         constexpr int gIntervals[] = {
150             3,  // 3 dashes: each count [0] followed by intervals [1..count]
151             2,  10, 10,
152             4,  20, 5, 5, 5,
153             2,  2, 2
154         };
155 
156         void (*gProc[])(SkPath*, const SkRect&) = {
157             make_path_line, make_path_rect, make_path_oval, make_path_star,
158         };
159 
160         SkPaint paint;
161         paint.setAntiAlias(true);
162         paint.setStyle(SkPaint::kStroke_Style);
163         paint.setStrokeWidth(SkIntToScalar(6));
164 
165         SkRect bounds = SkRect::MakeWH(SkIntToScalar(120), SkIntToScalar(120));
166         bounds.offset(SkIntToScalar(20), SkIntToScalar(20));
167         SkScalar dx = bounds.width() * 4 / 3;
168         SkScalar dy = bounds.height() * 4 / 3;
169 
170         const int* intervals = &gIntervals[1];
171         for (int y = 0; y < gIntervals[0]; ++y) {
172             SkScalar vals[SK_ARRAY_COUNT(gIntervals)];  // more than enough
173             int count = *intervals++;
174             for (int i = 0; i < count; ++i) {
175                 vals[i] = SkIntToScalar(*intervals++);
176             }
177             SkScalar phase = vals[0] / 2;
178             paint.setPathEffect(SkDashPathEffect::Make(vals, count, phase));
179 
180             for (size_t x = 0; x < SK_ARRAY_COUNT(gProc); ++x) {
181                 SkPath path;
182                 SkRect r = bounds;
183                 r.offset(x * dx, y * dy);
184                 gProc[x](&path, r);
185 
186                 canvas->drawPath(path, paint);
187             }
188         }
189     }
190 };
191 
192 //////////////////////////////////////////////////////////////////////////////
193 
194 // Test out the on/off line dashing Chrome if fond of
195 class Dashing3GM : public skiagm::GM {
196 public:
Dashing3GM()197     Dashing3GM() {}
198 
199 protected:
200 
onShortName()201     SkString onShortName() {
202         return SkString("dashing3");
203     }
204 
onISize()205     SkISize onISize() { return SkISize::Make(640, 480); }
206 
207     // Draw a 100x100 block of dashed lines. The horizontal ones are BW
208     // while the vertical ones are AA.
drawDashedLines(SkCanvas * canvas,SkScalar lineLength,SkScalar phase,SkScalar dashLength,int strokeWidth,bool circles)209     void drawDashedLines(SkCanvas* canvas,
210                          SkScalar lineLength,
211                          SkScalar phase,
212                          SkScalar dashLength,
213                          int strokeWidth,
214                          bool circles) {
215         SkPaint p;
216         p.setColor(SK_ColorBLACK);
217         p.setStyle(SkPaint::kStroke_Style);
218         p.setStrokeWidth(SkIntToScalar(strokeWidth));
219 
220         if (circles) {
221             p.setStrokeCap(SkPaint::kRound_Cap);
222         }
223 
224         SkScalar intervals[2] = { dashLength, dashLength };
225 
226         p.setPathEffect(SkDashPathEffect::Make(intervals, 2, phase));
227 
228         SkPoint pts[2];
229 
230         for (int y = 0; y < 100; y += 10*strokeWidth) {
231             pts[0].set(0, SkIntToScalar(y));
232             pts[1].set(lineLength, SkIntToScalar(y));
233 
234             canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts, p);
235         }
236 
237         p.setAntiAlias(true);
238 
239         for (int x = 0; x < 100; x += 14*strokeWidth) {
240             pts[0].set(SkIntToScalar(x), 0);
241             pts[1].set(SkIntToScalar(x), lineLength);
242 
243             canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts, p);
244         }
245     }
246 
onDraw(SkCanvas * canvas)247     virtual void onDraw(SkCanvas* canvas) {
248         // 1on/1off 1x1 squares with phase of 0 - points fastpath
249         canvas->save();
250             canvas->translate(2, 0);
251             this->drawDashedLines(canvas, 100, 0, SK_Scalar1, 1, false);
252         canvas->restore();
253 
254         // 1on/1off 1x1 squares with phase of .5 - rects fastpath (due to partial squares)
255         canvas->save();
256             canvas->translate(112, 0);
257             this->drawDashedLines(canvas, 100, SK_ScalarHalf, SK_Scalar1, 1, false);
258         canvas->restore();
259 
260         // 1on/1off 1x1 squares with phase of 1 - points fastpath
261         canvas->save();
262             canvas->translate(222, 0);
263             this->drawDashedLines(canvas, 100, SK_Scalar1, SK_Scalar1, 1, false);
264         canvas->restore();
265 
266         // 1on/1off 1x1 squares with phase of 1 and non-integer length - rects fastpath
267         canvas->save();
268             canvas->translate(332, 0);
269             this->drawDashedLines(canvas, 99.5f, SK_ScalarHalf, SK_Scalar1, 1, false);
270         canvas->restore();
271 
272         // 255on/255off 1x1 squares with phase of 0 - rects fast path
273         canvas->save();
274             canvas->translate(446, 0);
275             this->drawDashedLines(canvas, 100, 0, SkIntToScalar(255), 1, false);
276         canvas->restore();
277 
278         // 1on/1off 3x3 squares with phase of 0 - points fast path
279         canvas->save();
280             canvas->translate(2, 110);
281             this->drawDashedLines(canvas, 100, 0, SkIntToScalar(3), 3, false);
282         canvas->restore();
283 
284         // 1on/1off 3x3 squares with phase of 1.5 - rects fast path
285         canvas->save();
286             canvas->translate(112, 110);
287             this->drawDashedLines(canvas, 100, 1.5f, SkIntToScalar(3), 3, false);
288         canvas->restore();
289 
290         // 1on/1off 1x1 circles with phase of 1 - no fast path yet
291         canvas->save();
292             canvas->translate(2, 220);
293             this->drawDashedLines(canvas, 100, SK_Scalar1, SK_Scalar1, 1, true);
294         canvas->restore();
295 
296         // 1on/1off 3x3 circles with phase of 1 - no fast path yet
297         canvas->save();
298             canvas->translate(112, 220);
299             this->drawDashedLines(canvas, 100, 0, SkIntToScalar(3), 3, true);
300         canvas->restore();
301 
302         // 1on/1off 1x1 squares with rotation - should break fast path
303         canvas->save();
304             canvas->translate(332+SK_ScalarRoot2Over2*100, 110+SK_ScalarRoot2Over2*100);
305             canvas->rotate(45);
306             canvas->translate(-50, -50);
307 
308             this->drawDashedLines(canvas, 100, SK_Scalar1, SK_Scalar1, 1, false);
309         canvas->restore();
310 
311         // 3on/3off 3x1 rects - should use rect fast path regardless of phase
312         for (int phase = 0; phase <= 3; ++phase) {
313             canvas->save();
314                 canvas->translate(SkIntToScalar(phase*110+2),
315                                   SkIntToScalar(330));
316                 this->drawDashedLines(canvas, 100, SkIntToScalar(phase), SkIntToScalar(3), 1, false);
317             canvas->restore();
318         }
319     }
320 
321 };
322 
323 //////////////////////////////////////////////////////////////////////////////
324 
325 class Dashing4GM : public skiagm::GM {
326 public:
Dashing4GM()327     Dashing4GM() {}
328 
329 protected:
330 
onShortName()331     SkString onShortName() {
332         return SkString("dashing4");
333     }
334 
onISize()335     SkISize onISize() { return SkISize::Make(640, 1100); }
336 
onDraw(SkCanvas * canvas)337     virtual void onDraw(SkCanvas* canvas) {
338         constexpr struct {
339             int fOnInterval;
340             int fOffInterval;
341         } gData[] = {
342             { 1, 1 },
343             { 4, 2 },
344             { 0, 4 }, // test for zero length on interval
345         };
346 
347         SkPaint paint;
348         paint.setStyle(SkPaint::kStroke_Style);
349 
350         canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
351         canvas->translate(SK_ScalarHalf, SK_ScalarHalf);
352 
353         for (int width = 0; width <= 2; ++width) {
354             for (size_t data = 0; data < SK_ARRAY_COUNT(gData); ++data) {
355                 for (int aa = 0; aa <= 1; ++aa) {
356                     for (int cap = 0; cap <= 1; ++cap) {
357                         int w = width * width * width;
358                         paint.setAntiAlias(SkToBool(aa));
359                         paint.setStrokeWidth(SkIntToScalar(w));
360 
361                         SkToBool(cap) ? paint.setStrokeCap(SkPaint::kSquare_Cap)
362                             : paint.setStrokeCap(SkPaint::kRound_Cap);
363 
364                         int scale = w ? w : 1;
365 
366                         drawline(canvas, gData[data].fOnInterval * scale,
367                                  gData[data].fOffInterval * scale,
368                                  paint);
369                         canvas->translate(0, SkIntToScalar(20));
370                     }
371                 }
372             }
373         }
374 
375         for (int aa = 0; aa <= 1; ++aa) {
376             paint.setAntiAlias(SkToBool(aa));
377             paint.setStrokeWidth(8.f);
378             paint.setStrokeCap(SkPaint::kSquare_Cap);
379             // Single dash element that is cut off at start and end
380             drawline(canvas, 32, 16, paint, 20.f, 0, 5.f);
381             canvas->translate(0, SkIntToScalar(20));
382 
383             // Two dash elements where each one is cut off at beginning and end respectively
384             drawline(canvas, 32, 16, paint, 56.f, 0, 5.f);
385             canvas->translate(0, SkIntToScalar(20));
386 
387             // Many dash elements where first and last are cut off at beginning and end respectively
388             drawline(canvas, 32, 16, paint, 584.f, 0, 5.f);
389             canvas->translate(0, SkIntToScalar(20));
390 
391             // Diagonal dash line where src pnts are not axis aligned (as apposed to being diagonal from
392             // a canvas rotation)
393             drawline(canvas, 32, 16, paint, 600.f, 30.f);
394             canvas->translate(0, SkIntToScalar(20));
395 
396             // Case where only the off interval exists on the line. Thus nothing should be drawn
397             drawline(canvas, 32, 16, paint, 8.f, 0.f, 40.f);
398             canvas->translate(0, SkIntToScalar(20));
399         }
400 
401         // Test overlapping circles.
402         canvas->translate(SkIntToScalar(5), SkIntToScalar(20));
403         paint.setAntiAlias(true);
404         paint.setStrokeCap(SkPaint::kRound_Cap);
405         paint.setColor(0x44000000);
406         paint.setStrokeWidth(40);
407         drawline(canvas, 0, 30, paint);
408 
409         canvas->translate(0, SkIntToScalar(50));
410         paint.setStrokeCap(SkPaint::kSquare_Cap);
411         drawline(canvas, 0, 30, paint);
412 
413         // Test we draw the cap when the line length is zero.
414         canvas->translate(0, SkIntToScalar(50));
415         paint.setStrokeCap(SkPaint::kRound_Cap);
416         paint.setColor(0xFF000000);
417         paint.setStrokeWidth(11);
418         drawline(canvas, 0, 30, paint, 0);
419 
420         canvas->translate(SkIntToScalar(100), 0);
421         drawline(canvas, 1, 30, paint, 0);
422     }
423 };
424 
425 //////////////////////////////////////////////////////////////////////////////
426 
427 class Dashing5GM : public skiagm::GM {
428 public:
Dashing5GM(bool doAA)429     Dashing5GM(bool doAA) : fDoAA(doAA) {}
430 
431 protected:
432 
runAsBench() const433     bool runAsBench() const override { return true; }
434 
onShortName()435     SkString onShortName() override {
436         if (fDoAA) {
437             return SkString("dashing5_aa");
438         } else {
439             return SkString("dashing5_bw");
440         }
441     }
442 
onISize()443     SkISize onISize() override { return SkISize::Make(400, 200); }
444 
onDraw(SkCanvas * canvas)445     void onDraw(SkCanvas* canvas) override {
446         constexpr int kOn = 4;
447         constexpr int kOff = 4;
448         constexpr int kIntervalLength = kOn + kOff;
449 
450         constexpr SkColor gColors[kIntervalLength] = {
451             SK_ColorRED,
452             SK_ColorGREEN,
453             SK_ColorBLUE,
454             SK_ColorCYAN,
455             SK_ColorMAGENTA,
456             SK_ColorYELLOW,
457             SK_ColorGRAY,
458             SK_ColorDKGRAY
459         };
460 
461         SkPaint paint;
462         paint.setStyle(SkPaint::kStroke_Style);
463 
464         paint.setAntiAlias(fDoAA);
465 
466         SkMatrix rot;
467         rot.setRotate(90);
468         SkASSERT(rot.rectStaysRect());
469 
470         canvas->concat(rot);
471 
472         int sign;       // used to toggle the direction of the lines
473         int phase = 0;
474 
475         for (int x = 0; x < 200; x += 10) {
476             paint.setStrokeWidth(SkIntToScalar(phase+1));
477             paint.setColor(gColors[phase]);
478             sign = (x % 20) ? 1 : -1;
479             drawline(canvas, kOn, kOff, paint,
480                      SkIntToScalar(x), -sign * SkIntToScalar(10003),
481                      SkIntToScalar(phase),
482                      SkIntToScalar(x),  sign * SkIntToScalar(10003));
483             phase = (phase + 1) % kIntervalLength;
484         }
485 
486         for (int y = -400; y < 0; y += 10) {
487             paint.setStrokeWidth(SkIntToScalar(phase+1));
488             paint.setColor(gColors[phase]);
489             sign = (y % 20) ? 1 : -1;
490             drawline(canvas, kOn, kOff, paint,
491                      -sign * SkIntToScalar(10003), SkIntToScalar(y),
492                      SkIntToScalar(phase),
493                       sign * SkIntToScalar(10003), SkIntToScalar(y));
494             phase = (phase + 1) % kIntervalLength;
495         }
496     }
497 
498 private:
499     bool fDoAA;
500 };
501 
502 DEF_SIMPLE_GM(longpathdash, canvas, 612, 612) {
503     SkPath lines;
504     for (int x = 32; x < 256; x += 16) {
505         for (SkScalar a = 0; a < 3.141592f * 2; a += 0.03141592f) {
506             SkPoint pts[2] = {
507                 { 256 + (float) sin(a) * x,
508                   256 + (float) cos(a) * x },
509                 { 256 + (float) sin(a + 3.141592 / 3) * (x + 64),
510                   256 + (float) cos(a + 3.141592 / 3) * (x + 64) }
511             };
512             lines.moveTo(pts[0]);
513             for (SkScalar i = 0; i < 1; i += 0.05f) {
514                 lines.lineTo(pts[0].fX * (1 - i) + pts[1].fX * i,
515                              pts[0].fY * (1 - i) + pts[1].fY * i);
516             }
517         }
518     }
519     SkPaint p;
520     p.setAntiAlias(true);
521     p.setStyle(SkPaint::kStroke_Style);
522     p.setStrokeWidth(1);
523     const SkScalar intervals[] = { 1, 1 };
524     p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0));
525 
526     canvas->translate(50, 50);
527     canvas->drawPath(lines, p);
528 }
529 
530 DEF_SIMPLE_GM(longlinedash, canvas, 512, 512) {
531     SkPaint p;
532     p.setAntiAlias(true);
533     p.setStyle(SkPaint::kStroke_Style);
534     p.setStrokeWidth(80);
535 
536     const SkScalar intervals[] = { 2, 2 };
537     p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0));
538     canvas->drawRect(SkRect::MakeXYWH(-10000, 100, 20000, 20), p);
539 }
540 
541 DEF_SIMPLE_GM(longwavyline, canvas, 512, 512) {
542     SkPaint p;
543     p.setAntiAlias(true);
544     p.setStyle(SkPaint::kStroke_Style);
545     p.setStrokeWidth(2);
546 
547     SkPath wavy;
548     wavy.moveTo(-10000, 100);
549     for (SkScalar i = -10000; i < 10000; i += 20) {
550         wavy.quadTo(i + 5, 95, i + 10, 100);
551         wavy.quadTo(i + 15, 105, i + 20, 100);
552     }
553     canvas->drawPath(wavy, p);
554 }
555 
556 DEF_SIMPLE_GM(dashtextcaps, canvas, 512, 512) {
557     SkPaint p;
558     p.setAntiAlias(true);
559     p.setStyle(SkPaint::kStroke_Style);
560     p.setStrokeWidth(10);
561     p.setStrokeCap(SkPaint::kRound_Cap);
562     p.setStrokeJoin(SkPaint::kRound_Join);
563     p.setARGB(0xff, 0xbb, 0x00, 0x00);
564 
565     SkFont font(sk_tool_utils::create_portable_typeface(), 100);
566 
567     const SkScalar intervals[] = { 12, 12 };
568     p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0));
569     canvas->drawString("Sausages", 10, 90, font, p);
570     canvas->drawLine(8, 120, 456, 120, p);
571 }
572 
573 DEF_SIMPLE_GM(dash_line_zero_off_interval, canvas, 160, 330) {
574     static constexpr SkScalar kIntervals[] = {5.f, 0.f, 2.f, 0.f};
575     SkPaint dashPaint;
576     dashPaint.setPathEffect(SkDashPathEffect::Make(kIntervals, SK_ARRAY_COUNT(kIntervals), 0.f));
577     SkASSERT(dashPaint.getPathEffect());
578     dashPaint.setStyle(SkPaint::kStroke_Style);
579     dashPaint.setStrokeWidth(20.f);
580     static constexpr struct {
581         SkPoint fA, fB;
582     } kLines[] = {{{0.5f, 0.5f}, {30.5f, 0.5f}},    // horizontal
583                   {{0.5f, 0.5f}, {0.5f, 30.5f}},    // vertical
584                   {{0.5f, 0.5f}, {0.5f, 0.5f}},     // point
585                   {{0.5f, 0.5f}, {25.5f, 25.5f}}};  // diagonal
586     SkScalar pad = 5.f + dashPaint.getStrokeWidth();
587     canvas->translate(pad / 2.f, pad / 2.f);
588     canvas->save();
589     SkScalar h = 0.f;
590     for (const auto& line : kLines) {
591         h = SkTMax(h, SkScalarAbs(line.fA.fY - line.fB.fY));
592     }
593     for (const auto& line : kLines) {
594         SkScalar w = SkScalarAbs(line.fA.fX - line.fB.fX);
595         for (auto cap : {SkPaint::kButt_Cap, SkPaint::kSquare_Cap, SkPaint::kRound_Cap}) {
596             dashPaint.setStrokeCap(cap);
597             for (auto aa : {false, true}) {
598                 dashPaint.setAntiAlias(aa);
599                 canvas->drawLine(line.fA, line.fB, dashPaint);
600                 canvas->translate(0.f, pad + h);
601             }
602         }
603         canvas->restore();
604         canvas->translate(pad + w, 0.f);
605         canvas->save();
606     }
607 }
608 
609 //////////////////////////////////////////////////////////////////////////////
610 
611 DEF_GM(return new DashingGM;)
612 DEF_GM(return new Dashing2GM;)
613 DEF_GM(return new Dashing3GM;)
614 DEF_GM(return new Dashing4GM;)
615 DEF_GM(return new Dashing5GM(true);)
616 DEF_GM(return new Dashing5GM(false);)
617