1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "gm.h"
9#include "SkPicture.h"
10#include "SkRectShape.h"
11#include "SkGroupShape.h"
12
13typedef SkScalar (*MakePathProc)(SkPath*);
14
15static SkScalar make_frame(SkPath* path) {
16    SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
17                 SkIntToScalar(630), SkIntToScalar(470) };
18    path->addRoundRect(r, SkIntToScalar(15), SkIntToScalar(15));
19
20    SkPaint paint;
21    paint.setStyle(SkPaint::kStroke_Style);
22    paint.setStrokeWidth(SkIntToScalar(5));
23    paint.getFillPath(*path, path);
24    return SkIntToScalar(15);
25}
26
27static SkScalar make_triangle(SkPath* path) {
28    static const int gCoord[] = {
29        10, 20, 15, 5, 30, 30
30    };
31    path->moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]));
32    path->lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]));
33    path->lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]));
34    path->close();
35    path->offset(SkIntToScalar(10), SkIntToScalar(0));
36    return SkIntToScalar(30);
37}
38
39static SkScalar make_rect(SkPath* path) {
40    SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
41                 SkIntToScalar(30), SkIntToScalar(30) };
42    path->addRect(r);
43    path->offset(SkIntToScalar(10), SkIntToScalar(0));
44    return SkIntToScalar(30);
45}
46
47static SkScalar make_oval(SkPath* path) {
48    SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
49                 SkIntToScalar(30), SkIntToScalar(30) };
50    path->addOval(r);
51    path->offset(SkIntToScalar(10), SkIntToScalar(0));
52    return SkIntToScalar(30);
53}
54
55static SkScalar make_sawtooth(SkPath* path) {
56    SkScalar x = SkIntToScalar(20);
57    SkScalar y = SkIntToScalar(20);
58    const SkScalar x0 = x;
59    const SkScalar dx = SK_Scalar1 * 5;
60    const SkScalar dy = SK_Scalar1 * 10;
61
62    path->moveTo(x, y);
63    for (int i = 0; i < 32; i++) {
64        x += dx;
65        path->lineTo(x, y - dy);
66        x += dx;
67        path->lineTo(x, y + dy);
68    }
69    path->lineTo(x, y + (2 * dy));
70    path->lineTo(x0, y + (2 * dy));
71    path->close();
72    return SkIntToScalar(30);
73}
74
75static SkScalar make_star(SkPath* path, int n) {
76    const SkScalar c = SkIntToScalar(45);
77    const SkScalar r = SkIntToScalar(20);
78
79    SkScalar rad = -SK_ScalarPI / 2;
80    const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
81
82    path->moveTo(c, c - r);
83    for (int i = 1; i < n; i++) {
84        rad += drad;
85        SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
86        path->lineTo(c + SkScalarMul(cosV, r), c + SkScalarMul(sinV, r));
87    }
88    path->close();
89    return r * 2 * 6 / 5;
90}
91
92static SkScalar make_star_5(SkPath* path) { return make_star(path, 5); }
93static SkScalar make_star_13(SkPath* path) { return make_star(path, 13); }
94
95static const MakePathProc gProcs[] = {
96    make_frame,
97    make_triangle,
98    make_rect,
99    make_oval,
100    make_sawtooth,
101    make_star_5,
102    make_star_13
103};
104
105#define N   SK_ARRAY_COUNT(gProcs)
106
107namespace skiagm {
108
109class PathFillGM : public GM {
110    SkPath  fPath[N];
111    SkScalar fDY[N];
112public:
113    PathFillGM() {
114        for (size_t i = 0; i < N; i++) {
115            fDY[i] = gProcs[i](&fPath[i]);
116        }
117    }
118
119protected:
120    virtual SkString onShortName() {
121        return SkString("pathfill");
122    }
123
124    virtual SkISize onISize() {
125        return make_isize(640, 480);
126    }
127
128    virtual void onDraw(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(SkIntToScalar(0), fDY[i]);
135        }
136    }
137
138private:
139    typedef GM INHERITED;
140};
141
142///////////////////////////////////////////////////////////////////////////////
143
144static GM* MyFactory(void*) { return new PathFillGM; }
145static GMRegistry reg(MyFactory);
146
147}
148