1 /*
2 * Copyright 2012 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 "SkStrokeRec.h"
9 #include "SkPaintDefaults.h"
10
11 // must be < 0, since ==0 means hairline, and >0 means normal stroke
12 #define kStrokeRec_FillStyleWidth (-SK_Scalar1)
13
SkStrokeRec(InitStyle s)14 SkStrokeRec::SkStrokeRec(InitStyle s) {
15 fWidth = (kFill_InitStyle == s) ? kStrokeRec_FillStyleWidth : 0;
16 fMiterLimit = SkPaintDefaults_MiterLimit;
17 fCap = SkPaint::kDefault_Cap;
18 fJoin = SkPaint::kDefault_Join;
19 fStrokeAndFill = false;
20 }
21
SkStrokeRec(const SkStrokeRec & src)22 SkStrokeRec::SkStrokeRec(const SkStrokeRec& src) {
23 memcpy(this, &src, sizeof(src));
24 }
25
SkStrokeRec(const SkPaint & paint)26 SkStrokeRec::SkStrokeRec(const SkPaint& paint) {
27 switch (paint.getStyle()) {
28 case SkPaint::kFill_Style:
29 fWidth = kStrokeRec_FillStyleWidth;
30 fStrokeAndFill = false;
31 break;
32 case SkPaint::kStroke_Style:
33 fWidth = paint.getStrokeWidth();
34 fStrokeAndFill = false;
35 break;
36 case SkPaint::kStrokeAndFill_Style:
37 if (0 == paint.getStrokeWidth()) {
38 // hairline+fill == fill
39 fWidth = kStrokeRec_FillStyleWidth;
40 fStrokeAndFill = false;
41 } else {
42 fWidth = paint.getStrokeWidth();
43 fStrokeAndFill = true;
44 }
45 break;
46 default:
47 SkDEBUGFAIL("unknown paint style");
48 // fall back on just fill
49 fWidth = kStrokeRec_FillStyleWidth;
50 fStrokeAndFill = false;
51 break;
52 }
53
54 // copy these from the paint, regardless of our "style"
55 fMiterLimit = paint.getStrokeMiter();
56 fCap = paint.getStrokeCap();
57 fJoin = paint.getStrokeJoin();
58 }
59
getStyle() const60 SkStrokeRec::Style SkStrokeRec::getStyle() const {
61 if (fWidth < 0) {
62 return kFill_Style;
63 } else if (0 == fWidth) {
64 return kHairline_Style;
65 } else {
66 return fStrokeAndFill ? kStrokeAndFill_Style : kStroke_Style;
67 }
68 }
69
setFillStyle()70 void SkStrokeRec::setFillStyle() {
71 fWidth = kStrokeRec_FillStyleWidth;
72 fStrokeAndFill = false;
73 }
74
setHairlineStyle()75 void SkStrokeRec::setHairlineStyle() {
76 fWidth = 0;
77 fStrokeAndFill = false;
78 }
79
setStrokeStyle(SkScalar width,bool strokeAndFill)80 void SkStrokeRec::setStrokeStyle(SkScalar width, bool strokeAndFill) {
81 if (strokeAndFill && (0 == width)) {
82 // hairline+fill == fill
83 this->setFillStyle();
84 } else {
85 fWidth = width;
86 fStrokeAndFill = strokeAndFill;
87 }
88 }
89
90 #include "SkStroke.h"
91
applyToPath(SkPath * dst,const SkPath & src) const92 bool SkStrokeRec::applyToPath(SkPath* dst, const SkPath& src) const {
93 if (fWidth <= 0) { // hairline or fill
94 return false;
95 }
96
97 SkStroke stroker;
98 stroker.setCap(fCap);
99 stroker.setJoin(fJoin);
100 stroker.setMiterLimit(fMiterLimit);
101 stroker.setWidth(fWidth);
102 stroker.setDoFill(fStrokeAndFill);
103 stroker.strokePath(src, dst);
104 return true;
105 }
106