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1 /* | |
2 * Copyright 2013 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 "SkCanvas.h" | |
10 #include "SkPath.h" | |
11 | |
12 namespace skiagm { | |
13 | |
robertphillips
2013/11/08 16:19:44
Could you add a comment here describing what the G
yunchao
2013/11/08 16:54:43
Agree.
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14 class NonClosedPathsGM: public GM { | |
15 public: | |
16 NonClosedPathsGM() {} | |
17 | |
18 enum ClosureType { | |
robertphillips
2013/11/08 16:19:44
TotalNonClose -> TotallyNonClosed
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19 TotalNonClose, // The last point doesn't coincide with the first one in the contour. | |
20 // The path looks not closed at all. | |
21 | |
22 FakeCloseCorner, // The last point coincides with the first one at a co rner. | |
robertphillips
2013/11/08 16:19:44
Please remove the "like".
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23 // The path looks like closed, but final rendering has 2 ends with cap. | |
24 | |
25 FakeCloseMiddle, // The last point coincides with the first one in the middle of a line. | |
26 // The path looks closed, and the final rendering look s closed too. | |
27 | |
28 kClosureTypeCount | |
29 }; | |
30 | |
31 protected: | |
32 virtual SkString onShortName() SK_OVERRIDE { | |
33 return SkString("nonclosedpaths"); | |
34 } | |
35 | |
36 virtual SkISize onISize() SK_OVERRIDE { | |
37 return SkISize::Make(1220, 1920); | |
38 } | |
39 | |
40 // Use rect-like geometry for non-closed path, for right angles make it | |
41 // easier to show the visual difference of lineCap and lineJoin. | |
robertphillips
2013/11/08 16:19:44
Please change makePath to MakePath.
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42 static void makePath(SkPath* path, ClosureType type) { | |
43 if (FakeCloseMiddle == type) { | |
44 path.moveTo(30, 50); | |
45 path.lineTo(30, 30); | |
46 } else { | |
47 path.moveTo(30, 30); | |
48 } | |
49 path.lineTo(70, 30); | |
50 path.lineTo(70, 70); | |
51 path.lineTo(30, 70); | |
52 path.lineTo(30, 50); | |
53 if (FakeCloseCorner == type) { | |
54 path.lineTo(30, 30); | |
55 } | |
56 } | |
57 | |
58 // Set the location for the current test on the canvas | |
robertphillips
2013/11/08 16:19:44
Please change to SetLocation.
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59 static void setLocation(SkCanvas* canvas, int counter, int lineNum) { | |
60 SkScalar x = SK_Scalar1 * 100 * (counter % lineNum) + 10 + SK_Scalar1 / 4; | |
61 SkScalar y = SK_Scalar1 * 100 * (counter / lineNum) + 10 + 3 * SK_Scalar 1 / 4; | |
62 canvas->translate(x, y); | |
63 } | |
64 | |
65 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { | |
66 static const int kStrokeWidth[] = {0, 10, 40, 50}; | |
67 size_t numWidths = SK_ARRAY_COUNT(kStrokeWidth); | |
68 | |
69 static const SkPaint::Style kStyle[] = { | |
70 SkPaint::kStroke_Style, SkPaint::kStrokeAndFill_Style | |
71 }; | |
72 | |
73 static const SkPaint::Cap kCap[] = { | |
74 SkPaint::kButt_Cap, SkPaint::kRound_Cap, SkPaint::kSquare_Cap | |
75 }; | |
76 | |
77 static const SkPaint::Join kJoin[] = { | |
78 SkPaint::kMiter_Join, SkPaint::kRound_Join, SkPaint::kBevel_Join | |
79 }; | |
80 | |
81 static const ClosureType kType[] = { | |
82 TotalNonClose, FakeCloseCorner, FakeCloseMiddle | |
83 }; | |
84 | |
85 int counter = 0; | |
86 SkPaint paint; | |
87 paint.setAntiAlias(true); | |
88 | |
89 // For stroke style painter and fill-and-stroke style painter | |
90 for (size_t type = 0; type < kClosureTypeCount; ++type) { | |
91 for (size_t style = 0; style < SK_ARRAY_COUNT(kStyle); ++style) { | |
92 for (size_t cap = 0; cap < SK_ARRAY_COUNT(kCap); ++cap) { | |
93 for (size_t join = 0; join < SK_ARRAY_COUNT(kJoin); ++join) { | |
94 for (size_t width = 0; width < numWidths; ++width) { | |
95 canvas->save(); | |
96 setLocation(canvas, counter, SkPaint::kJoinCount * n umWidths); | |
97 | |
98 SkPath path; | |
robertphillips
2013/11/08 16:19:44
Don't need this-> any more.
yunchao
2013/11/08 16:54:43
I don't know what I was thinking, I have made it a
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99 this->makePath(&path, kType[type]); | |
100 | |
101 paint.setStyle(kStyle[style]); | |
102 paint.setStrokeCap(kCap[cap]); | |
103 paint.setStrokeJoin(kJoin[join]); | |
104 paint.setStrokeWidth(SkIntToScalar(strokeWidth[width ])); | |
105 | |
106 canvas->drawPath(path, paint); | |
107 canvas->restore(); | |
robertphillips
2013/11/08 16:19:44
Pre-increment here please.
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108 counter++; | |
109 } | |
110 } | |
111 } | |
112 } | |
113 } | |
114 | |
115 // For fill style painter | |
116 for (size_t type = 0; type < kClosureTypeCount; ++type) { | |
117 canvas->save(); | |
118 setLocation(canvas, counter, SkPaint::kJoinCount * numWidths); | |
119 | |
120 SkPath path; | |
robertphillips
2013/11/08 16:19:44
Don't need this-> here anymore
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121 this->makePath(&path, kType[type]); | |
122 | |
robertphillips
2013/11/08 16:19:44
Don't think this needs to be inside the loop.
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123 paint.setStyle(SkPaint::kFill_Style); | |
124 | |
125 canvas->drawPath(path, paint); | |
126 canvas->restore(); | |
robertphillips
2013/11/08 16:19:44
Pre-increment here too.
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127 counter++; | |
128 } | |
129 } | |
130 | |
131 private: | |
132 typedef GM INHERITED; | |
133 }; | |
134 | |
135 ////////////////////////////////////////////////////////////////////////////// | |
136 | |
137 DEF_GM(return new NonClosedPathsGM;) | |
138 | |
139 } | |
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