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
|
/*
* 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 "SkView.h"
#include "SkCanvas.h"
#include "SkConcaveToTriangles.h"
#define SIZE SkIntToScalar(150)
typedef void (*PathProc)(SkPath*);
static void make_path0(SkPath* path) {
SkRect r;
r.set(0, 0, SIZE, SIZE);
path->addRect(r);
}
static void make_path1(SkPath* path) {
SkRect r;
r.set(0, 0, SIZE, SIZE);
path->addRoundRect(r, SIZE/4, SIZE/4);
}
static void make_path2(SkPath* path) {
SkRect r;
r.set(0, 0, SIZE, SIZE);
path->addOval(r);
}
static const PathProc gProcs[] = {
make_path0,
make_path1,
make_path2,
};
#define COUNT_PROCS SK_ARRAY_COUNT(gProcs)
class TriangleView : public SkView {
public:
SkPath fPaths[COUNT_PROCS];
TriangleView() {
for (size_t i = 0; i < COUNT_PROCS; i++) {
gProcs[i](&fPaths[i]);
}
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Triangles");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(SK_ColorGRAY);
}
static void draw_path(SkCanvas* canvas, const SkPaint& pathPaint,
const SkPath& path, const SkPaint& triPaint) {
canvas->drawPath(path, pathPaint);
int n = path.getPoints(NULL, 0);
SkPoint* pts = new SkPoint[n];
path.getPoints(pts, n);
SkTDArray<SkPoint> triangles;
if (SkConcaveToTriangles(n, pts, &triangles)) {
canvas->drawVertices(SkCanvas::kTriangles_VertexMode,
triangles.count(), triangles.begin(), NULL,
NULL, NULL, NULL, 0, triPaint);
}
SkPaint paint;
paint.setColor(SK_ColorGREEN);
paint.setStrokeWidth(SkIntToScalar(4));
canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, paint);
delete[] pts;
}
virtual void onDraw(SkCanvas* canvas) {
this->drawBG(canvas);
canvas->translate(SIZE/2, SIZE/2);
SkPaint pathPaint, triPaint;
pathPaint.setColor(SK_ColorBLUE);
pathPaint.setStrokeWidth(SIZE / 12);
triPaint.setColor(SK_ColorRED);
triPaint.setStyle(SkPaint::kStroke_Style);
for (size_t i = 0; i < COUNT_PROCS; i++) {
pathPaint.setStyle(SkPaint::kFill_Style);
draw_path(canvas, pathPaint, fPaths[i], triPaint);
canvas->save();
canvas->translate(0, SIZE * 6 / 5);
pathPaint.setStyle(SkPaint::kStroke_Style);
draw_path(canvas, pathPaint, fPaths[i], triPaint);
canvas->restore();
canvas->translate(SIZE * 6 / 5, 0);
}
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new TriangleView; }
static SkViewRegister reg(MyFactory);
|
