1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
#include "SkPaint.h"
#include "Sk1DPathEffect.h"
#include "Sk2DPathEffect.h"
#include "SkCornerPathEffect.h"
#include "SkDashPathEffect.h"
#include "SkDiscretePathEffect.h"
namespace skiagm {
static void compose_pe(SkPaint* paint) {
SkPathEffect* pe = paint->getPathEffect();
sk_sp<SkPathEffect> corner = SkCornerPathEffect::Make(25);
sk_sp<SkPathEffect> compose;
if (pe) {
compose = SkPathEffect::MakeCompose(sk_ref_sp(pe), corner);
} else {
compose = corner;
}
paint->setPathEffect(compose);
}
static void hair_pe(SkPaint* paint) {
paint->setStrokeWidth(0);
}
static void hair2_pe(SkPaint* paint) {
paint->setStrokeWidth(0);
compose_pe(paint);
}
static void stroke_pe(SkPaint* paint) {
paint->setStrokeWidth(12);
compose_pe(paint);
}
static void dash_pe(SkPaint* paint) {
SkScalar inter[] = { 20, 10, 10, 10 };
paint->setStrokeWidth(12);
paint->setPathEffect(SkDashPathEffect::Make(inter, SK_ARRAY_COUNT(inter), 0));
compose_pe(paint);
}
constexpr int gXY[] = {
4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4
};
static void scale(SkPath* path, SkScalar scale) {
SkMatrix m;
m.setScale(scale, scale);
path->transform(m);
}
static void one_d_pe(SkPaint* paint) {
SkPath path;
path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1]));
for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2)
path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1]));
path.close();
path.offset(SkIntToScalar(-6), 0);
scale(&path, 1.5f);
paint->setPathEffect(SkPath1DPathEffect::Make(path, SkIntToScalar(21), 0,
SkPath1DPathEffect::kRotate_Style));
compose_pe(paint);
}
typedef void (*PE_Proc)(SkPaint*);
constexpr PE_Proc gPE[] = { hair_pe, hair2_pe, stroke_pe, dash_pe, one_d_pe };
static void fill_pe(SkPaint* paint) {
paint->setStyle(SkPaint::kFill_Style);
paint->setPathEffect(nullptr);
}
static void discrete_pe(SkPaint* paint) {
paint->setPathEffect(SkDiscretePathEffect::Make(10, 4));
}
static sk_sp<SkPathEffect> MakeTileEffect() {
SkMatrix m;
m.setScale(SkIntToScalar(12), SkIntToScalar(12));
SkPath path;
path.addCircle(0, 0, SkIntToScalar(5));
return SkPath2DPathEffect::Make(m, path);
}
static void tile_pe(SkPaint* paint) {
paint->setPathEffect(MakeTileEffect());
}
constexpr PE_Proc gPE2[] = { fill_pe, discrete_pe, tile_pe };
class PathEffectGM : public GM {
public:
PathEffectGM() {}
protected:
SkString onShortName() override {
return SkString("patheffect");
}
SkISize onISize() override { return SkISize::Make(800, 600); }
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
SkPath path;
path.moveTo(20, 20);
path.lineTo(70, 120);
path.lineTo(120, 30);
path.lineTo(170, 80);
path.lineTo(240, 50);
size_t i;
canvas->save();
for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
gPE[i](&paint);
canvas->drawPath(path, paint);
canvas->translate(0, 75);
}
canvas->restore();
path.reset();
SkRect r = { 0, 0, 250, 120 };
path.addOval(r, SkPath::kCW_Direction);
r.inset(50, 50);
path.addRect(r, SkPath::kCCW_Direction);
canvas->translate(320, 20);
for (i = 0; i < SK_ARRAY_COUNT(gPE2); i++) {
gPE2[i](&paint);
canvas->drawPath(path, paint);
canvas->translate(0, 160);
}
SkIRect rect = SkIRect::MakeXYWH(20, 20, 60, 60);
for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
SkPaint p;
p.setAntiAlias(true);
p.setStyle(SkPaint::kFill_Style);
gPE[i](&p);
canvas->drawIRect(rect, p);
canvas->translate(75, 0);
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* PathEffectFactory(void*) { return new PathEffectGM; }
static GMRegistry regPathEffect(PathEffectFactory);
}
|
