1 /*
2 * Copyright 2011 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 #include "SampleCode.h"
8 #include "SkView.h"
9 #include "SkCanvas.h"
10 #include "SkGraphics.h"
11 #include "SkRandom.h"
12 #include "SkBlurDrawLooper.h"
13 #include "SkGradientShader.h"
14
15 typedef SkScalar (*MakePathProc)(SkPath*);
16
make_frame(SkPath * path)17 static SkScalar make_frame(SkPath* path) {
18 SkRect r = { 10, 10, 630, 470 };
19 path->addRoundRect(r, 15, 15);
20
21 SkPaint paint;
22 paint.setStyle(SkPaint::kStroke_Style);
23 paint.setStrokeWidth(5);
24 paint.getFillPath(*path, path);
25 return 15;
26 }
27
make_triangle(SkPath * path)28 static SkScalar make_triangle(SkPath* path) {
29 static const int gCoord[] = {
30 10, 20, 15, 5, 30, 30
31 };
32 path->moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]));
33 path->lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]));
34 path->lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]));
35 path->close();
36 path->offset(10, 0);
37 return SkIntToScalar(30);
38 }
39
make_rect(SkPath * path)40 static SkScalar make_rect(SkPath* path) {
41 SkRect r = { 10, 10, 30, 30 };
42 path->addRect(r);
43 path->offset(10, 0);
44 return SkIntToScalar(30);
45 }
46
make_oval(SkPath * path)47 static SkScalar make_oval(SkPath* path) {
48 SkRect r = { 10, 10, 30, 30 };
49 path->addOval(r);
50 path->offset(10, 0);
51 return SkIntToScalar(30);
52 }
53
make_sawtooth(SkPath * path)54 static SkScalar make_sawtooth(SkPath* path) {
55 SkScalar x = SkIntToScalar(20);
56 SkScalar y = SkIntToScalar(20);
57 const SkScalar x0 = x;
58 const SkScalar dx = SK_Scalar1 * 5;
59 const SkScalar dy = SK_Scalar1 * 10;
60
61 path->moveTo(x, y);
62 for (int i = 0; i < 32; i++) {
63 x += dx;
64 path->lineTo(x, y - dy);
65 x += dx;
66 path->lineTo(x, y + dy);
67 }
68 path->lineTo(x, y + 2 * dy);
69 path->lineTo(x0, y + 2 * dy);
70 path->close();
71 return SkIntToScalar(30);
72 }
73
make_star(SkPath * path,int n)74 static SkScalar make_star(SkPath* path, int n) {
75 const SkScalar c = SkIntToScalar(45);
76 const SkScalar r = SkIntToScalar(20);
77
78 SkScalar rad = -SK_ScalarPI / 2;
79 const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
80
81 path->moveTo(c, c - r);
82 for (int i = 1; i < n; i++) {
83 rad += drad;
84 SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
85 path->lineTo(c + cosV * r, c + sinV * r);
86 }
87 path->close();
88 return r * 2 * 6 / 5;
89 }
90
make_star_5(SkPath * path)91 static SkScalar make_star_5(SkPath* path) { return make_star(path, 5); }
make_star_13(SkPath * path)92 static SkScalar make_star_13(SkPath* path) { return make_star(path, 13); }
93
94 static const MakePathProc gProcs[] = {
95 make_frame,
96 make_triangle,
97 make_rect,
98 make_oval,
99 make_sawtooth,
100 make_star_5,
101 make_star_13
102 };
103
104 #define N SK_ARRAY_COUNT(gProcs)
105
106 class PathFillView : public SampleView {
107 SkPath fPath[N];
108 SkScalar fDY[N];
109
110 public:
PathFillView()111 PathFillView() {
112 for (size_t i = 0; i < N; i++) {
113 fDY[i] = gProcs[i](&fPath[i]);
114 }
115 this->setBGColor(0xFFDDDDDD);
116 }
117
118 protected:
119 // overrides from SkEventSink
onQuery(SkEvent * evt)120 virtual bool onQuery(SkEvent* evt) {
121 if (SampleCode::TitleQ(*evt)) {
122 SampleCode::TitleR(evt, "PathFill");
123 return true;
124 }
125 return this->INHERITED::onQuery(evt);
126 }
127
onDrawContent(SkCanvas * canvas)128 virtual void onDrawContent(SkCanvas* canvas) {
129 SkPaint paint;
130 paint.setAntiAlias(true);
131
132 for (size_t i = 0; i < N; i++) {
133 canvas->drawPath(fPath[i], paint);
134 canvas->translate(0, fDY[i]);
135 }
136 }
137
138 private:
139 typedef SampleView INHERITED;
140 };
141
142 //////////////////////////////////////////////////////////////////////////////
143
MyFactory()144 static SkView* MyFactory() { return new PathFillView; }
145 static SkViewRegister reg(MyFactory);
146