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
214
|
/**********************************************************************
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.net
*
* PostGIS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* PostGIS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PostGIS. If not, see <http://www.gnu.org/licenses/>.
*
**********************************************************************
*
* Copyright 2006 Corporacion Autonoma Regional de Santander
* Copyright 2010 Paul Ramsey <pramsey@cleverelephant.ca>
*
**********************************************************************/
#include "liblwgeom_internal.h"
#include "stringbuffer.h"
static int lwgeom_to_kml2_sb(const LWGEOM *geom, int precision, const char *prefix, stringbuffer_t *sb);
static int lwpoint_to_kml2_sb(const LWPOINT *point, int precision, const char *prefix, stringbuffer_t *sb);
static int lwline_to_kml2_sb(const LWLINE *line, int precision, const char *prefix, stringbuffer_t *sb);
static int lwtriangle_to_kml2_sb(const LWTRIANGLE *tri, int precision, const char *prefix, stringbuffer_t *sb);
static int lwpoly_to_kml2_sb(const LWPOLY *poly, int precision, const char *prefix, stringbuffer_t *sb);
static int lwcollection_to_kml2_sb(const LWCOLLECTION *col, int precision, const char *prefix, stringbuffer_t *sb);
static int ptarray_to_kml2_sb(const POINTARRAY *pa, int precision, stringbuffer_t *sb);
/*
* KML 2.2.0
*/
/* takes a GEOMETRY and returns a KML representation */
lwvarlena_t *
lwgeom_to_kml2(const LWGEOM *geom, int precision, const char *prefix)
{
stringbuffer_t *sb;
int rv;
/* Can't do anything with empty */
if( lwgeom_is_empty(geom) )
return NULL;
sb = stringbuffer_create();
rv = lwgeom_to_kml2_sb(geom, precision, prefix, sb);
if ( rv == LW_FAILURE )
{
stringbuffer_destroy(sb);
return NULL;
}
lwvarlena_t *v = stringbuffer_getvarlenacopy(sb);
stringbuffer_destroy(sb);
return v;
}
static int
lwgeom_to_kml2_sb(const LWGEOM *geom, int precision, const char *prefix, stringbuffer_t *sb)
{
switch (geom->type)
{
case POINTTYPE:
return lwpoint_to_kml2_sb((LWPOINT*)geom, precision, prefix, sb);
case LINETYPE:
return lwline_to_kml2_sb((LWLINE*)geom, precision, prefix, sb);
case TRIANGLETYPE:
return lwtriangle_to_kml2_sb((LWTRIANGLE *)geom, precision, prefix, sb);
case POLYGONTYPE:
return lwpoly_to_kml2_sb((LWPOLY*)geom, precision, prefix, sb);
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case TINTYPE:
return lwcollection_to_kml2_sb((LWCOLLECTION*)geom, precision, prefix, sb);
default:
lwerror("lwgeom_to_kml2: '%s' geometry type not supported", lwtype_name(geom->type));
return LW_FAILURE;
}
}
static int
ptarray_to_kml2_sb(const POINTARRAY *pa, int precision, stringbuffer_t *sb)
{
uint32_t i, j;
uint32_t dims = FLAGS_GET_Z(pa->flags) ? 3 : 2;
POINT4D pt;
double *d;
for ( i = 0; i < pa->npoints; i++ )
{
getPoint4d_p(pa, i, &pt);
d = (double*)(&pt);
if ( i ) stringbuffer_append_len(sb," ",1);
for (j = 0; j < dims; j++)
{
if ( j ) stringbuffer_append_len(sb,",",1);
stringbuffer_append_double(sb, d[j], precision);
}
}
return LW_SUCCESS;
}
static int
lwpoint_to_kml2_sb(const LWPOINT *point, int precision, const char *prefix, stringbuffer_t *sb)
{
/* Open point */
if ( stringbuffer_aprintf(sb, "<%sPoint><%scoordinates>", prefix, prefix) < 0 ) return LW_FAILURE;
/* Coordinate array */
if ( ptarray_to_kml2_sb(point->point, precision, sb) == LW_FAILURE ) return LW_FAILURE;
/* Close point */
if ( stringbuffer_aprintf(sb, "</%scoordinates></%sPoint>", prefix, prefix) < 0 ) return LW_FAILURE;
return LW_SUCCESS;
}
static int
lwline_to_kml2_sb(const LWLINE *line, int precision, const char *prefix, stringbuffer_t *sb)
{
/* Open linestring */
if ( stringbuffer_aprintf(sb, "<%sLineString><%scoordinates>", prefix, prefix) < 0 ) return LW_FAILURE;
/* Coordinate array */
if ( ptarray_to_kml2_sb(line->points, precision, sb) == LW_FAILURE ) return LW_FAILURE;
/* Close linestring */
if ( stringbuffer_aprintf(sb, "</%scoordinates></%sLineString>", prefix, prefix) < 0 ) return LW_FAILURE;
return LW_SUCCESS;
}
static int
lwtriangle_to_kml2_sb(const LWTRIANGLE *tri, int precision, const char *prefix, stringbuffer_t *sb)
{
/* Open polygon */
if (stringbuffer_aprintf(
sb, "<%sPolygon><%souterBoundaryIs><%sLinearRing><%scoordinates>", prefix, prefix, prefix, prefix) < 0)
return LW_FAILURE;
/* Coordinate array */
if (ptarray_to_kml2_sb(tri->points, precision, sb) == LW_FAILURE)
return LW_FAILURE;
/* Close polygon */
if (stringbuffer_aprintf(
sb, "</%scoordinates></%sLinearRing></%souterBoundaryIs></%sPolygon>", prefix, prefix, prefix, prefix) <
0)
return LW_FAILURE;
return LW_SUCCESS;
}
static int
lwpoly_to_kml2_sb(const LWPOLY *poly, int precision, const char *prefix, stringbuffer_t *sb)
{
uint32_t i;
int rv;
/* Open polygon */
if ( stringbuffer_aprintf(sb, "<%sPolygon>", prefix) < 0 ) return LW_FAILURE;
for ( i = 0; i < poly->nrings; i++ )
{
/* Inner or outer ring opening tags */
if( i )
rv = stringbuffer_aprintf(sb, "<%sinnerBoundaryIs><%sLinearRing><%scoordinates>", prefix, prefix, prefix);
else
rv = stringbuffer_aprintf(sb, "<%souterBoundaryIs><%sLinearRing><%scoordinates>", prefix, prefix, prefix);
if ( rv < 0 ) return LW_FAILURE;
/* Coordinate array */
if ( ptarray_to_kml2_sb(poly->rings[i], precision, sb) == LW_FAILURE ) return LW_FAILURE;
/* Inner or outer ring closing tags */
if( i )
rv = stringbuffer_aprintf(sb, "</%scoordinates></%sLinearRing></%sinnerBoundaryIs>", prefix, prefix, prefix);
else
rv = stringbuffer_aprintf(sb, "</%scoordinates></%sLinearRing></%souterBoundaryIs>", prefix, prefix, prefix);
if ( rv < 0 ) return LW_FAILURE;
}
/* Close polygon */
if ( stringbuffer_aprintf(sb, "</%sPolygon>", prefix) < 0 ) return LW_FAILURE;
return LW_SUCCESS;
}
static int
lwcollection_to_kml2_sb(const LWCOLLECTION *col, int precision, const char *prefix, stringbuffer_t *sb)
{
uint32_t i;
int rv;
/* Open geometry */
if ( stringbuffer_aprintf(sb, "<%sMultiGeometry>", prefix) < 0 ) return LW_FAILURE;
for ( i = 0; i < col->ngeoms; i++ )
{
rv = lwgeom_to_kml2_sb(col->geoms[i], precision, prefix, sb);
if ( rv == LW_FAILURE ) return LW_FAILURE;
}
/* Close geometry */
if ( stringbuffer_aprintf(sb, "</%sMultiGeometry>", prefix) < 0 ) return LW_FAILURE;
return LW_SUCCESS;
}
|
