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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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