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
14SkArcToPathEffect::SkArcToPathEffect(SkScalar radius) : fRadius(radius) {}
15
16bool 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    }
60DONE:
61    return true;
62}
63
64SkFlattenable* SkArcToPathEffect::CreateProc(SkReadBuffer& buffer) {
65    return SkArcToPathEffect::Create(buffer.readScalar());
66}
67
68void SkArcToPathEffect::flatten(SkWriteBuffer& buffer) const {
69    buffer.writeScalar(fRadius);
70}
71
72#ifndef SK_IGNORE_TO_STRING
73void SkArcToPathEffect::toString(SkString* str) const {
74    str->appendf("SkArcToPathEffect: (");
75    str->appendf("radius: %f", fRadius);
76    str->appendf(")");
77}
78#endif
79