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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
//========================================================================
//
// SplashPath.cc
//
// Copyright 2003-2013 Glyph & Cog, LLC
//
//========================================================================
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
#include <string.h>
#include "gmem.h"
#include "gmempp.h"
#include "SplashErrorCodes.h"
#include "SplashPath.h"
//------------------------------------------------------------------------
// SplashPath
//------------------------------------------------------------------------
// A path can be in three possible states:
//
// 1. no current point -- zero or more finished subpaths
// [curSubpath == length]
//
// 2. one point in subpath
// [curSubpath == length - 1]
//
// 3. open subpath with two or more points
// [curSubpath < length - 1]
SplashPath::SplashPath() {
pts = NULL;
flags = NULL;
length = size = 0;
curSubpath = 0;
hints = NULL;
hintsLength = hintsSize = 0;
}
SplashPath::SplashPath(SplashPath *path) {
length = path->length;
size = path->size;
pts = (SplashPathPoint *)gmallocn(size, sizeof(SplashPathPoint));
flags = (Guchar *)gmallocn(size, sizeof(Guchar));
memcpy(pts, path->pts, length * sizeof(SplashPathPoint));
memcpy(flags, path->flags, length * sizeof(Guchar));
curSubpath = path->curSubpath;
if (path->hints) {
hintsLength = hintsSize = path->hintsLength;
hints = (SplashPathHint *)gmallocn(hintsSize, sizeof(SplashPathHint));
memcpy(hints, path->hints, hintsLength * sizeof(SplashPathHint));
} else {
hints = NULL;
hintsLength = hintsSize = 0;
}
}
SplashPath::~SplashPath() {
gfree(pts);
gfree(flags);
gfree(hints);
}
// Add space for <nPts> more points.
void SplashPath::grow(int nPts) {
if (length + nPts > size) {
if (size == 0) {
size = 32;
}
while (size < length + nPts) {
size *= 2;
}
pts = (SplashPathPoint *)greallocn(pts, size, sizeof(SplashPathPoint));
flags = (Guchar *)greallocn(flags, size, sizeof(Guchar));
}
}
void SplashPath::append(SplashPath *path) {
int i;
curSubpath = length + path->curSubpath;
grow(path->length);
for (i = 0; i < path->length; ++i) {
pts[length] = path->pts[i];
flags[length] = path->flags[i];
++length;
}
}
SplashError SplashPath::moveTo(SplashCoord x, SplashCoord y) {
if (onePointSubpath()) {
return splashErrBogusPath;
}
grow(1);
pts[length].x = x;
pts[length].y = y;
flags[length] = splashPathFirst | splashPathLast;
curSubpath = length++;
return splashOk;
}
SplashError SplashPath::lineTo(SplashCoord x, SplashCoord y) {
if (noCurrentPoint()) {
return splashErrNoCurPt;
}
flags[length-1] &= (Guchar)~splashPathLast;
grow(1);
pts[length].x = x;
pts[length].y = y;
flags[length] = splashPathLast;
++length;
return splashOk;
}
SplashError SplashPath::curveTo(SplashCoord x1, SplashCoord y1,
SplashCoord x2, SplashCoord y2,
SplashCoord x3, SplashCoord y3) {
if (noCurrentPoint()) {
return splashErrNoCurPt;
}
flags[length-1] &= (Guchar)~splashPathLast;
grow(3);
pts[length].x = x1;
pts[length].y = y1;
flags[length] = splashPathCurve;
++length;
pts[length].x = x2;
pts[length].y = y2;
flags[length] = splashPathCurve;
++length;
pts[length].x = x3;
pts[length].y = y3;
flags[length] = splashPathLast;
++length;
return splashOk;
}
SplashError SplashPath::close(GBool force) {
if (noCurrentPoint()) {
return splashErrNoCurPt;
}
if (force ||
curSubpath == length - 1 ||
pts[length - 1].x != pts[curSubpath].x ||
pts[length - 1].y != pts[curSubpath].y) {
lineTo(pts[curSubpath].x, pts[curSubpath].y);
}
flags[curSubpath] |= splashPathClosed;
flags[length - 1] |= splashPathClosed;
curSubpath = length;
return splashOk;
}
void SplashPath::addStrokeAdjustHint(int ctrl0, int ctrl1,
int firstPt, int lastPt,
GBool projectingCap) {
if (hintsLength == hintsSize) {
hintsSize = hintsLength ? 2 * hintsLength : 8;
hints = (SplashPathHint *)greallocn(hints, hintsSize,
sizeof(SplashPathHint));
}
hints[hintsLength].ctrl0 = ctrl0;
hints[hintsLength].ctrl1 = ctrl1;
hints[hintsLength].firstPt = firstPt;
hints[hintsLength].lastPt = lastPt;
hints[hintsLength].projectingCap = projectingCap;
++hintsLength;
}
void SplashPath::offset(SplashCoord dx, SplashCoord dy) {
int i;
for (i = 0; i < length; ++i) {
pts[i].x += dx;
pts[i].y += dy;
}
}
GBool SplashPath::getCurPt(SplashCoord *x, SplashCoord *y) {
if (noCurrentPoint()) {
return gFalse;
}
*x = pts[length - 1].x;
*y = pts[length - 1].y;
return gTrue;
}
GBool SplashPath::containsZeroLengthSubpaths() {
GBool zeroLength;
int i;
zeroLength = gTrue; // make gcc happy
for (i = 0; i < length; ++i) {
if (flags[i] & splashPathFirst) {
zeroLength = gTrue;
} else {
if (pts[i].x != pts[i-1].x || pts[i].y != pts[i-1].y) {
zeroLength = gFalse;
}
if (flags[i] & splashPathLast) {
if (zeroLength) {
return gTrue;
}
}
}
}
return gFalse;
}
|
