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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 "SampleCode.h" | |
9 | |
10 #include "SkCanvas.h" | |
11 #include "SkCornerPathEffect.h" | |
12 #include "SkDashPathEffect.h" | |
13 #include "SkPathUtils.h" | |
14 #include "SkRandom.h" | |
15 #include "SkView.h" | |
16 | |
17 typedef void (*BitsToPath)(SkPath*, const char*, int, int, int); | |
18 | |
19 static const BitsToPath gBitsToPath_fns[] = { | |
20 SkPathUtils::BitsToPath_Path, | |
21 SkPathUtils::BitsToPath_Region, | |
22 }; | |
23 | |
24 // hardcoded bitmap patterns | |
25 static const uint8_t gBits[][16] = { | |
26 { 0x18, 0x00, 0x3c, 0x00, 0x7e, 0x00, 0xdb, 0x00, | |
27 0xff, 0x00, 0x24, 0x00, 0x5a, 0x00, 0xa5, 0x00 }, | |
28 | |
29 { 0x20, 0x80, 0x91, 0x20, 0xbf, 0xa0, 0xee, 0xe0, | |
30 0xff, 0xe0, 0x7f, 0xc0, 0x20, 0x80, 0x40, 0x40 }, | |
31 | |
32 { 0x0f, 0x00, 0x7f, 0xe0, 0xff, 0xf0, 0xe6, 0x70, | |
33 0xff, 0xf0, 0x19, 0x80, 0x36, 0xc0, 0xc0, 0x30 } | |
34 }; | |
35 | |
36 | |
37 class SamplePathUtils : public SampleView { | |
38 public: | |
39 static const int fNumBits = 3; | |
40 static const int fH = 8, fW = 12; | |
41 static const size_t fRowBytes = 2; | |
42 static const int fNumChars = fH * fRowBytes; | |
43 | |
44 SkPaint fBmpPaint; | |
45 SkScalar fPhase; | |
46 | |
47 SamplePathUtils() { | |
48 fBmpPaint.setAntiAlias(true); // Black paint for bitmap | |
49 fBmpPaint.setStyle(SkPaint::kFill_Style); | |
50 | |
51 fPhase = 0.0f; // to animate the dashed path | |
52 } | |
53 | |
54 protected: | |
55 // overrides from SkEventSink | |
56 virtual bool onQuery(SkEvent* evt) { | |
57 if (SampleCode::TitleQ(*evt)) { | |
58 SampleCode::TitleR(evt, "PathUtils"); | |
59 return true; | |
60 } | |
61 return this->INHERITED::onQuery(evt); | |
62 } | |
63 | |
64 ///////////////////////////////////////////////////////////// | |
65 | |
66 virtual void onDrawContent(SkCanvas* canvas) { | |
67 SkScalar intervals[8] = { .5f, .3f, .5f, .3f, .5f, .3f, .5f, .3f }; | |
68 SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(intervals,
2, fPhase)); | |
69 SkAutoTUnref<SkCornerPathEffect> corner(SkCornerPathEffect::Create(.25f)
); | |
70 SkAutoTUnref<SkComposePathEffect> compose(SkComposePathEffect::Create(da
sh, corner)); | |
71 | |
72 SkPaint outlinePaint; | |
73 outlinePaint.setAntiAlias(true); // dashed paint for bitmap | |
74 outlinePaint.setStyle(SkPaint::kStroke_Style); | |
75 outlinePaint.setPathEffect(compose); | |
76 | |
77 canvas->scale(10.0f, 10.0f); // scales up | |
78 | |
79 for (int i = 0; i < fNumBits; ++i) { | |
80 canvas->save(); | |
81 for (size_t j = 0; j < SK_ARRAY_COUNT(gBitsToPath_fns); ++j) { | |
82 SkPath path; | |
83 gBitsToPath_fns[j](&path, (char*) &gBits[i], fW, fH, fRowBytes); | |
84 | |
85 //draw skPath and outline | |
86 canvas->drawPath(path, fBmpPaint); | |
87 canvas->translate(1.5f * fW, 0); // translates past previous bit
map | |
88 canvas->drawPath(path, outlinePaint); | |
89 canvas->translate(1.5f * fW, 0); // translates past previous bit
map | |
90 } | |
91 canvas->restore(); | |
92 canvas->translate(0, 1.5f * fH); //translate to next row | |
93 } | |
94 | |
95 // for animated pathEffect | |
96 fPhase += .01f; | |
97 this->inval(NULL); | |
98 } | |
99 | |
100 private: | |
101 typedef SkView INHERITED; | |
102 }; | |
103 | |
104 ////////////////////////////////////////////////////////////////////////////// | |
105 | |
106 static SkView* MyFactory() { return new SamplePathUtils; } | |
107 static SkViewRegister reg(MyFactory) | |
108 ; | |
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