1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkOpContour.h"
#include "SkPath.h"
class SkIntersectionHelper {
public:
enum SegmentType {
kHorizontalLine_Segment = -1,
kVerticalLine_Segment = 0,
kLine_Segment = SkPath::kLine_Verb,
kQuad_Segment = SkPath::kQuad_Verb,
kCubic_Segment = SkPath::kCubic_Verb,
};
void addCoincident(SkIntersectionHelper& other, const SkIntersections& ts, bool swap) {
fContour->addCoincident(fIndex, other.fContour, other.fIndex, ts, swap);
}
// FIXME: does it make sense to write otherIndex now if we're going to
// fix it up later?
void addOtherT(int index, double otherT, int otherIndex) {
fContour->addOtherT(fIndex, index, otherT, otherIndex);
}
// Avoid collapsing t values that are close to the same since
// we walk ts to describe consecutive intersections. Since a pair of ts can
// be nearly equal, any problems caused by this should be taken care
// of later.
// On the edge or out of range values are negative; add 2 to get end
int addT(const SkIntersectionHelper& other, const SkPoint& pt, double newT) {
return fContour->addT(fIndex, other.fContour, other.fIndex, pt, newT);
}
int addSelfT(const SkIntersectionHelper& other, const SkPoint& pt, double newT) {
return fContour->addSelfT(fIndex, other.fContour, other.fIndex, pt, newT);
}
int addUnsortableT(const SkIntersectionHelper& other, bool start, const SkPoint& pt,
double newT) {
return fContour->addUnsortableT(fIndex, other.fContour, other.fIndex, start, pt, newT);
}
bool advance() {
return ++fIndex < fLast;
}
SkScalar bottom() const {
return bounds().fBottom;
}
const SkPathOpsBounds& bounds() const {
return fContour->segments()[fIndex].bounds();
}
void init(SkOpContour* contour) {
fContour = contour;
fIndex = 0;
fLast = contour->segments().count();
}
bool isAdjacent(const SkIntersectionHelper& next) {
return fContour == next.fContour && fIndex + 1 == next.fIndex;
}
bool isFirstLast(const SkIntersectionHelper& next) {
return fContour == next.fContour && fIndex == 0
&& next.fIndex == fLast - 1;
}
SkScalar left() const {
return bounds().fLeft;
}
const SkPoint* pts() const {
return fContour->segments()[fIndex].pts();
}
SkScalar right() const {
return bounds().fRight;
}
SegmentType segmentType() const {
const SkOpSegment& segment = fContour->segments()[fIndex];
SegmentType type = (SegmentType) segment.verb();
if (type != kLine_Segment) {
return type;
}
if (segment.isHorizontal()) {
return kHorizontalLine_Segment;
}
if (segment.isVertical()) {
return kVerticalLine_Segment;
}
return kLine_Segment;
}
bool startAfter(const SkIntersectionHelper& after) {
fIndex = after.fIndex;
return advance();
}
SkScalar top() const {
return bounds().fTop;
}
SkPath::Verb verb() const {
return fContour->segments()[fIndex].verb();
}
SkScalar x() const {
return bounds().fLeft;
}
bool xFlipped() const {
return x() != pts()[0].fX;
}
SkScalar y() const {
return bounds().fTop;
}
bool yFlipped() const {
return y() != pts()[0].fY;
}
private:
SkOpContour* fContour;
int fIndex;
int fLast;
};
|
