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| 1 /* |
| 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 "SkArcToPathEffect.h" |
| 9 #include "SkPath.h" |
| 10 #include "SkPoint.h" |
| 11 #include "SkReadBuffer.h" |
| 12 #include "SkWriteBuffer.h" |
| 13 |
| 14 SkArcToPathEffect::SkArcToPathEffect(SkScalar radius) : fRadius(radius) {} |
| 15 |
| 16 bool SkArcToPathEffect::filterPath(SkPath* dst, const SkPath& src, |
| 17 SkStrokeRec*, const SkRect*) const { |
| 18 SkPath::Iter iter(src, false); |
| 19 SkPath::Verb verb; |
| 20 SkPoint pts[4]; |
| 21 |
| 22 SkPoint lastCorner = { 0, 0 }; // avoid warning |
| 23 SkPath::Verb prevVerb = SkPath::kMove_Verb; |
| 24 |
| 25 for (;;) { |
| 26 switch (verb = iter.next(pts, false)) { |
| 27 case SkPath::kMove_Verb: |
| 28 if (SkPath::kLine_Verb == prevVerb) { |
| 29 dst->lineTo(lastCorner); |
| 30 } |
| 31 dst->moveTo(pts[0]); |
| 32 break; |
| 33 case SkPath::kLine_Verb: |
| 34 if (prevVerb == SkPath::kLine_Verb) { |
| 35 dst->arcTo(pts[0], pts[1], fRadius); |
| 36 } |
| 37 lastCorner = pts[1]; |
| 38 break; |
| 39 case SkPath::kQuad_Verb: |
| 40 dst->quadTo(pts[1], pts[2]); |
| 41 lastCorner = pts[2]; |
| 42 break; |
| 43 case SkPath::kConic_Verb: |
| 44 dst->conicTo(pts[1], pts[2], iter.conicWeight()); |
| 45 lastCorner = pts[2]; |
| 46 break; |
| 47 case SkPath::kCubic_Verb: |
| 48 dst->cubicTo(pts[1], pts[2], pts[3]); |
| 49 lastCorner = pts[3]; |
| 50 break; |
| 51 case SkPath::kClose_Verb: |
| 52 dst->lineTo(lastCorner); |
| 53 break; |
| 54 case SkPath::kDone_Verb: |
| 55 dst->lineTo(lastCorner); |
| 56 goto DONE; |
| 57 } |
| 58 prevVerb = verb; |
| 59 } |
| 60 DONE: |
| 61 return true; |
| 62 } |
| 63 |
| 64 SkFlattenable* SkArcToPathEffect::CreateProc(SkReadBuffer& buffer) { |
| 65 return SkArcToPathEffect::Create(buffer.readScalar()); |
| 66 } |
| 67 |
| 68 void SkArcToPathEffect::flatten(SkWriteBuffer& buffer) const { |
| 69 buffer.writeScalar(fRadius); |
| 70 } |
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