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review.blissroms.org / platform_external_skia / c943bd5984df80a1e138c7ae81515620ce8a68e3 / . / gm / convexpaths.cpp
blob: b3800cd2d43c090cf758a692feb2f8524884646d [file] [log] [blame]
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]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 "SkRandom.h"
10#include "SkTArray.h"
11
12namespace skiagm {
13
14class ConvexPathsGM : public GM {
15public:
16 ConvexPathsGM() {
bsalomon@google.com72b55be2012-01-26 20:33:19 +0000[diff] [blame]17 this->setBGColor(0xFF000000);
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]18 this->makePaths();
19 }
20
21protected:
22 virtual SkString onShortName() {
23 return SkString("convexpaths");
24 }
25
26
27 virtual SkISize onISize() {
28 return make_isize(1200, 900);
29 }
30
31 void makePaths() {
32 fPaths.push_back().addRect(0, 0,
33 100 * SK_Scalar1, 100 * SK_Scalar1,
34 SkPath::kCW_Direction);
35
36 fPaths.push_back().addRect(0, 0,
37 100 * SK_Scalar1, 100 * SK_Scalar1,
38 SkPath::kCCW_Direction);
39
40 fPaths.push_back().addCircle(50 * SK_Scalar1, 50 * SK_Scalar1,
41 50 * SK_Scalar1, SkPath::kCW_Direction);
42
43 fPaths.push_back().addCircle(50 * SK_Scalar1, 50 * SK_Scalar1,
44 40 * SK_Scalar1, SkPath::kCCW_Direction);
45
46 fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
47 50 * SK_Scalar1,
48 100 * SK_Scalar1),
49 SkPath::kCW_Direction);
50
51 fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
52 100 * SK_Scalar1,
53 50 * SK_Scalar1),
54 SkPath::kCCW_Direction);
55
56 fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
57 100 * SK_Scalar1,
58 5 * SK_Scalar1),
59 SkPath::kCCW_Direction);
60
61 fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
62 SK_Scalar1,
63 100 * SK_Scalar1),
64 SkPath::kCCW_Direction);
65
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]66 fPaths.push_back().addRoundRect(SkRect::MakeXYWH(0, 0,
67 SK_Scalar1 * 100,
68 SK_Scalar1 * 100),
69 40 * SK_Scalar1, 20 * SK_Scalar1,
70 SkPath::kCW_Direction);
71
72 fPaths.push_back().addRoundRect(SkRect::MakeXYWH(0, 0,
73 SK_Scalar1 * 100,
74 SK_Scalar1 * 100),
75 20 * SK_Scalar1, 40 * SK_Scalar1,
76 SkPath::kCCW_Direction);
bsalomon@google.com72b55be2012-01-26 20:33:19 +0000[diff] [blame]77
78 // shallow diagonals
79 fPaths.push_back().lineTo(100 * SK_Scalar1, SK_Scalar1);
80 fPaths.back().lineTo(98 * SK_Scalar1, 100 * SK_Scalar1);
81 fPaths.back().lineTo(3 * SK_Scalar1, 96 * SK_Scalar1);
82
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]83 /*
bsalomon@google.com5cc90d12012-01-17 16:28:34 +0000[diff] [blame]84 It turns out arcTos are not automatically marked as convex and they
85 may in fact be ever so slightly concave.
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]86 fPaths.push_back().arcTo(SkRect::MakeXYWH(0, 0,
87 50 * SK_Scalar1,
88 100 * SK_Scalar1),
89 25 * SK_Scalar1, 130 * SK_Scalar1, false);
90 */
91
bsalomon@google.com72b55be2012-01-26 20:33:19 +0000[diff] [blame]92 // cubics
93 fPaths.push_back().cubicTo( 1 * SK_Scalar1, 1 * SK_Scalar1,
94 10 * SK_Scalar1, 90 * SK_Scalar1,
95 0 * SK_Scalar1, 100 * SK_Scalar1);
96 fPaths.push_back().cubicTo(100 * SK_Scalar1, 50 * SK_Scalar1,
97 20 * SK_Scalar1, 100 * SK_Scalar1,
98 0 * SK_Scalar1, 0 * SK_Scalar1);
99
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]100 // point degenerate
bsalomon@google.com5cc90d12012-01-17 16:28:34 +0000[diff] [blame]101 fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
102 fPaths.back().lineTo(50 * SK_Scalar1, 50 * SK_Scalar1);
103
104 fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
105 fPaths.back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
106 50 * SK_Scalar1, 50 * SK_Scalar1);
107 fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
108 fPaths.back().cubicTo(50 * SK_Scalar1, 50 * SK_Scalar1,
109 50 * SK_Scalar1, 50 * SK_Scalar1,
110 50 * SK_Scalar1, 50 * SK_Scalar1);
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]111
112 // line degenerate
113 fPaths.push_back().lineTo(100 * SK_Scalar1, 100 * SK_Scalar1);
114 fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1, 0, 0);
115 fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1,
116 50 * SK_Scalar1, 50 * SK_Scalar1);
117 fPaths.push_back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
118 100 * SK_Scalar1, 100 * SK_Scalar1);
119 fPaths.push_back().cubicTo(0, 0,
120 0, 0,
121 100 * SK_Scalar1, 100 * SK_Scalar1);
122 }
123
124 virtual void onDraw(SkCanvas* canvas) {
125
126 SkPaint paint;
127 paint.setAntiAlias(true);
128 SkRandom rand;
129 canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
bsalomon@google.com72b55be2012-01-26 20:33:19 +0000[diff] [blame]130 for (int i = 0; i < fPaths.count(); ++i) {
bsalomon@google.com69cc6ad2012-01-17 14:25:10 +0000[diff] [blame]131 canvas->save();
132 // position the path, and make it at off-integer coords.
133 canvas->translate(SK_Scalar1 * 200 * (i % 5) + SK_Scalar1 / 4,
134 SK_Scalar1 * 200 * (i / 5) + 3 * SK_Scalar1 / 4);
135 SkColor color = rand.nextU();
136 color |= 0xff000000;
137 paint.setColor(color);
138 SkASSERT(fPaths[i].isConvex());
139 canvas->drawPath(fPaths[i], paint);
140 canvas->restore();
141 }
142 }
143
144private:
145 typedef GM INHERITED;
146 SkTArray<SkPath> fPaths;
147};
148
149//////////////////////////////////////////////////////////////////////////////
150
151static GM* MyFactory(void*) { return new ConvexPathsGM; }
152static GMRegistry reg(MyFactory);
153
154}
155