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 "SkCanvas.h"
10 #include "SkPath.h"
11 #include "SkDashPathEffect.h"
12
generate_square(SkScalar cx,SkScalar cy,SkScalar w)13 static SkPath generate_square(SkScalar cx, SkScalar cy, SkScalar w) {
14 SkRect rect = SkRect::MakeXYWH(cx - w / 2, cy - w / 2, w, w);
15 SkPath path;
16 path.addRect(rect);
17 return path;
18 }
19
generate_rect_line(SkScalar cx,SkScalar cy,SkScalar l)20 static SkPath generate_rect_line(SkScalar cx, SkScalar cy, SkScalar l) {
21 SkRect rect = SkRect::MakeXYWH(cx - l / 2, cy, l, 0);
22 SkPath path;
23 path.addRect(rect);
24 return path;
25 }
26
generate_circle(SkScalar cx,SkScalar cy,SkScalar d)27 static SkPath generate_circle(SkScalar cx, SkScalar cy, SkScalar d) {
28 SkPath path;
29 path.addCircle(cx, cy, d/2, SkPath::kCW_Direction);
30 return path;
31 }
32
generate_line(SkScalar cx,SkScalar cy,SkScalar l)33 static SkPath generate_line(SkScalar cx, SkScalar cy, SkScalar l) {
34 SkPath path;
35 path.moveTo(cx - l / 2, cy);
36 path.lineTo(cx + l / 2, cy);
37 return path;
38 }
39
40 namespace {
41 struct Style {
Style__anon17743ec10111::Style42 Style(SkPaint::Style paintStyle, sk_sp<SkPathEffect> pe = sk_sp<SkPathEffect>())
43 : fPaintStyle(paintStyle)
44 , fPathEffect(std::move(pe)) {}
45 SkPaint::Style fPaintStyle;
46 sk_sp<SkPathEffect> fPathEffect;
47 };
48
make_dash()49 sk_sp<SkPathEffect> make_dash() {
50 constexpr SkScalar kIntervals[] = { 4.f, 3.f };
51 return SkDashPathEffect::Make(kIntervals, SK_ARRAY_COUNT(kIntervals), 0);
52 }
53
54 Style styles[] {
55 {SkPaint::kStroke_Style},
56 {SkPaint::kStrokeAndFill_Style},
57 {SkPaint::kFill_Style},
58 {SkPaint::kStroke_Style, make_dash()},
59 };
60
61 SkScalar pathSizes[] = {
62 40,
63 10,
64 0
65 };
66 SkScalar strokeWidths[] = {
67 10,
68 0
69 };
70 SkPath (*paths[])(SkScalar, SkScalar, SkScalar) = {
71 generate_square,
72 generate_rect_line,
73 generate_circle,
74 generate_line
75 };
76
77 const SkScalar slideWidth = 90, slideHeight = 90;
78 const SkScalar slideBoundary = 5;
79
80 } // namespace
81
82 DEF_SIMPLE_GM(inverse_paths, canvas, 800, 1200) {
83 SkScalar cx = slideWidth / 2 + slideBoundary;
84 SkScalar cy = slideHeight / 2 + slideBoundary;
85 SkScalar dx = slideWidth + 2 * slideBoundary;
86 SkScalar dy = slideHeight + 2 * slideBoundary;
87
88 SkRect clipRect = SkRect::MakeLTRB(slideBoundary, slideBoundary,
89 slideBoundary + slideWidth,
90 slideBoundary + slideHeight);
91 SkPaint clipPaint;
92 clipPaint.setStyle(SkPaint::kStroke_Style);
93 clipPaint.setStrokeWidth(SkIntToScalar(2));
94
95 SkPaint outlinePaint;
96 outlinePaint.setColor(0x40000000);
97 outlinePaint.setStyle(SkPaint::kStroke_Style);
98 outlinePaint.setStrokeWidth(SkIntToScalar(0));
99
100 for (size_t styleIndex = 0; styleIndex < SK_ARRAY_COUNT(styles);
101 styleIndex++) {
102 for (size_t sizeIndex = 0; sizeIndex < SK_ARRAY_COUNT(pathSizes);
103 sizeIndex++) {
104 SkScalar size = pathSizes[sizeIndex];
105
106 canvas->save();
107
108 for (size_t widthIndex = 0;
109 widthIndex < SK_ARRAY_COUNT(strokeWidths);
110 widthIndex++) {
111 SkPaint paint;
112 paint.setColor(0xff007000);
113 paint.setStrokeWidth(strokeWidths[widthIndex]);
114 paint.setStyle(styles[styleIndex].fPaintStyle);
115 paint.setPathEffect(styles[styleIndex].fPathEffect);
116
117 for (size_t pathIndex = 0;
118 pathIndex < SK_ARRAY_COUNT(paths);
119 pathIndex++) {
120 canvas->drawRect(clipRect, clipPaint);
121
122 canvas->save();
123 canvas->clipRect(clipRect);
124
125 SkPath path = paths[pathIndex](cx, cy, size);
126 path.setFillType(SkPath::kInverseWinding_FillType);
127 canvas->drawPath(path, paint);
128
129 path.setFillType(SkPath::kWinding_FillType);
130 canvas->drawPath(path, outlinePaint);
131
132 canvas->restore();
133 canvas->translate(dx, 0);
134 }
135 }
136 canvas->restore();
137 canvas->translate(0, dy);
138 }
139 }
140 }
141