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
170
171
172
173
174
175
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SampleCode.h"
#include "SkBlurMask.h"
#include "SkBlurDrawLooper.h"
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkPathMeasure.h"
#define REPEAT_COUNT 1
static void textStrokePath(SkCanvas* canvas) {
SkPaint paint;
SkPath path;
SkRect rect;
canvas->save();
canvas->scale(SkIntToScalar(250),SkIntToScalar(250));
rect.set(0.0f, 0.21f,
0.78f, 0.99f);
path.addArc(rect, SkIntToScalar(280), SkIntToScalar(350));
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xFFFF0000);
paint.setTextSize(0.085f);
paint.setStrokeWidth(.005f);
canvas->drawPath(path, paint);
paint.setLooper(SkBlurDrawLooper::Create(SK_ColorBLACK,
SkBlurMask::ConvertRadiusToSigma(0.002f),
0.0f,
0.0f))->unref();
const char* text = "DRAWING STROKED TEXT WITH A BLUR ON A PATH";
size_t len = strlen(text);
canvas->drawTextOnPathHV(text, len, path, 0,
-0.025f, paint);
canvas->restore();
}
static void textPathMatrix(SkCanvas* canvas) {
SkPaint paint;
SkPath path;
SkMatrix matrix;
path.moveTo(SkIntToScalar(050), SkIntToScalar(200));
path.quadTo(SkIntToScalar(250), SkIntToScalar(000),
SkIntToScalar(450), SkIntToScalar(200));
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawPath(path, paint);
paint.setStyle(SkPaint::kFill_Style);
paint.setTextSize(SkIntToScalar(48));
paint.setTextAlign(SkPaint::kRight_Align);
const char* text = "Reflection";
size_t len = strlen(text);
SkPathMeasure meas(path, false);
SkScalar pathLen = meas.getLength();
canvas->drawTextOnPath(text, len, path, NULL, paint);
paint.setColor(SK_ColorRED);
matrix.setScale(-SK_Scalar1, SK_Scalar1);
matrix.postTranslate(pathLen, 0);
canvas->drawTextOnPath(text, len, path, &matrix, paint);
paint.setColor(SK_ColorBLUE);
matrix.setScale(SK_Scalar1, -SK_Scalar1);
canvas->drawTextOnPath(text, len, path, &matrix, paint);
paint.setColor(SK_ColorGREEN);
matrix.setScale(-SK_Scalar1, -SK_Scalar1);
matrix.postTranslate(pathLen, 0);
canvas->drawTextOnPath(text, len, path, &matrix, paint);
}
class TextOnPathView : public SampleView {
public:
SkPath fPath;
SkScalar fHOffset;
TextOnPathView() {
SkRect r;
r.set(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(300), SkIntToScalar(300));
fPath.addOval(r);
fPath.offset(SkIntToScalar(-50), SkIntToScalar(-50));
fHOffset = SkIntToScalar(50);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Text On Path");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(SkIntToScalar(48));
const char* text = "Hamburgefons";
size_t len = strlen(text);
for (int j = 0; j < REPEAT_COUNT; j++) {
SkScalar x = fHOffset;
paint.setColor(SK_ColorBLACK);
canvas->drawTextOnPathHV(text, len, fPath,
x, paint.getTextSize()/2, paint);
paint.setColor(SK_ColorRED);
canvas->drawTextOnPathHV(text, len, fPath,
x + SkIntToScalar(50), 0, paint);
paint.setColor(SK_ColorBLUE);
canvas->drawTextOnPathHV(text, len, fPath,
x + SkIntToScalar(100), -paint.getTextSize()/2, paint);
}
paint.setColor(SK_ColorGREEN);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawPath(fPath, paint);
canvas->translate(SkIntToScalar(275), 0);
textStrokePath(canvas);
canvas->translate(SkIntToScalar(-275), SkIntToScalar(250));
textPathMatrix(canvas);
if (REPEAT_COUNT > 1)
this->inval(NULL);
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) SK_OVERRIDE {
fHints += 1;
this->inval(NULL);
return this->INHERITED::onFindClickHandler(x, y, modi);
}
virtual bool onClick(Click* click) {
return this->INHERITED::onClick(click);
}
private:
int fHints;
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() {
return new TextOnPathView;
}
static SkViewRegister reg(MyFactory);
|
