| reed | 8b57524 | 2014-12-17 01:47:32 -0800 | [diff] [blame] | 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 | } |