blob: 889374463a4178675db6c64605e027e1ea908102 [file] [log] [blame]
liyuqiane60d8552016-10-03 13:49:37 -07001/*
2 * Copyright 2014 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
8#include "gm.h"
9#include "SkPath.h"
10#include "SkScan.h"
11
12#define W 800
13#define H 800
14
15class AnalyticAntiAliasConvexGM : public skiagm::GM {
16public:
17 AnalyticAntiAliasConvexGM() {}
18
19protected:
20
21 SkString onShortName() override {
22 return SkString("analytic_antialias_convex");
23 }
24
25 SkISize onISize() override {
26 return SkISize::Make(W, H);
27 }
28
29 void onDraw(SkCanvas* canvas) override {
30 SkPaint p;
31 p.setColor(SK_ColorRED);
32 p.setAntiAlias(true);
33
34 canvas->clear(0xFFFFFFFF);
35
36 canvas->save();
37
38 SkScalar y = 0;
39
40 canvas->translate(0, y);
41 canvas->rotate(1);
42 canvas->drawRectCoords(20, 20, 200, 200, p);
43 canvas->restore();
44
45 y += 200;
46
47 canvas->translate(0, y);
48 canvas->rotate(1);
49 canvas->drawRectCoords(20, 20, 20.2f, 200, p);
50 canvas->drawRectCoords(20, 200, 200, 200.1f, p);
51 canvas->drawCircle(100, 100, 30, p);
52 canvas->restore();
liyuqian451ceba2016-11-07 08:10:44 -080053
54 // The following path is empty but it'll reveal bug chrome:662914
55 SkPath path;
56 path.moveTo(SkBits2Float(0x429b9d5c), SkBits2Float(0x4367a041)); // 77.8073f, 231.626f
57 // 77.8075f, 231.626f, 77.8074f, 231.625f, 77.8073f, 231.625f
58 path.cubicTo(SkBits2Float(0x429b9d71), SkBits2Float(0x4367a022),
59 SkBits2Float(0x429b9d64), SkBits2Float(0x4367a009),
60 SkBits2Float(0x429b9d50), SkBits2Float(0x43679ff2));
61 path.lineTo(SkBits2Float(0x429b9d5c), SkBits2Float(0x4367a041)); // 77.8073f, 231.626f
62 path.close();
63 canvas->drawPath(path, p);
Yuqian Li0038b7f2016-11-14 11:51:41 -050064
65 // The following path reveals a subtle SkAnalyticQuadraticEdge::updateQuadratic bug:
66 // we should not use any snapped y for the intermediate values whose error may accumulate;
67 // snapping should only be allowed once before updateLine.
68 path.reset();
69 path.moveTo(SkBits2Float(0x434ba71e), SkBits2Float(0x438a06d0)); // 203.653f, 276.053f
70 path.lineTo(SkBits2Float(0x43492a74), SkBits2Float(0x4396d70d)); // 201.166f, 301.68f
71 // 200.921f, 304.207f, 196.939f, 303.82f, 0.707107f
72 path.conicTo(SkBits2Float(0x4348ebaf), SkBits2Float(0x43981a75),
73 SkBits2Float(0x4344f079), SkBits2Float(0x4397e900), SkBits2Float(0x3f3504f3));
74 path.close();
75 // Manually setting convexity is required. Otherwise, this path will be considered concave.
76 path.setConvexity(SkPath::kConvex_Convexity);
77 canvas->drawPath(path, p);
liyuqiane60d8552016-10-03 13:49:37 -070078 }
79
80private:
81 typedef skiagm::GM INHERITED;
82};
83
Yuqian Li131c1fb2016-12-12 16:24:47 -050084class AnalyticAntiAliasGeneralGM : public skiagm::GM {
85public:
86 AnalyticAntiAliasGeneralGM() {}
87
88protected:
89
90 SkString onShortName() override {
91 return SkString("analytic_antialias_general");
92 }
93
94 SkISize onISize() override {
95 return SkISize::Make(W, H);
96 }
97
98 void onDraw(SkCanvas* canvas) override {
99 SkPaint p;
100 p.setColor(SK_ColorRED);
101 p.setAntiAlias(true);
102
103 canvas->clear(0xFFFFFFFF);
104
105 canvas->save();
106 canvas->rotate(1);
107 const SkScalar R = 115.2f, C = 128.0f;
108 SkPath path;
109 path.moveTo(C + R, C);
110 for (int i = 1; i < 8; ++i) {
111 SkScalar a = 2.6927937f * i;
112 SkScalar cosine;
113 SkScalar sine = SkScalarSinCos(a, &cosine);
114 path.lineTo(C + R * cosine, C + R * sine);
115 }
116 canvas->drawPath(path, p);
117 canvas->restore();
118
119 canvas->save();
120 canvas->translate(200, 0);
121 canvas->rotate(1);
122 p.setStyle(SkPaint::kStroke_Style);
123 p.setStrokeWidth(5);
124 canvas->drawPath(path, p);
125 canvas->restore();
126 }
127
128private:
129 typedef skiagm::GM INHERITED;
130};
131
132class AnalyticAntiAliasInverseGM : public skiagm::GM {
133public:
134 AnalyticAntiAliasInverseGM() {}
135
136protected:
137
138 SkString onShortName() override {
139 return SkString("analytic_antialias_inverse");
140 }
141
142 SkISize onISize() override {
143 return SkISize::Make(W, H);
144 }
145
146 void onDraw(SkCanvas* canvas) override {
147 SkPaint p;
148 p.setColor(SK_ColorRED);
149 p.setAntiAlias(true);
150
151 canvas->save();
152
153 SkPath path;
154 path.addCircle(100, 100, 30);
155 path.setFillType(SkPath::kInverseWinding_FillType);
156 canvas->drawPath(path, p);
157 canvas->restore();
158 }
159
160private:
161 typedef skiagm::GM INHERITED;
162};
163
liyuqiane60d8552016-10-03 13:49:37 -0700164DEF_GM( return new AnalyticAntiAliasConvexGM; )
Yuqian Li131c1fb2016-12-12 16:24:47 -0500165DEF_GM( return new AnalyticAntiAliasGeneralGM; )
166DEF_GM( return new AnalyticAntiAliasInverseGM; )