Line data Source code
1 : /******************************************************************************
2 : *
3 : * Project: OpenGIS Simple Features Reference Implementation
4 : * Purpose: Implements OGRDGNDriver class.
5 : * Author: Frank Warmerdam, warmerdam@pobox.com
6 : *
7 : ******************************************************************************
8 : * Copyright (c) 2000, Frank Warmerdam (warmerdam@pobox.com)
9 : *
10 : * Permission is hereby granted, free of charge, to any person obtaining a
11 : * copy of this software and associated documentation files (the "Software"),
12 : * to deal in the Software without restriction, including without limitation
13 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 : * and/or sell copies of the Software, and to permit persons to whom the
15 : * Software is furnished to do so, subject to the following conditions:
16 : *
17 : * The above copyright notice and this permission notice shall be included
18 : * in all copies or substantial portions of the Software.
19 : *
20 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 : * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 : * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 : * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 : * DEALINGS IN THE SOFTWARE.
27 : ****************************************************************************/
28 :
29 : #include "ogr_dgn.h"
30 : #include "cpl_conv.h"
31 :
32 : /************************************************************************/
33 : /* Open() */
34 : /************************************************************************/
35 :
36 46244 : static int OGRDGNDriverIdentify(GDALOpenInfo *poOpenInfo)
37 :
38 : {
39 49810 : if (poOpenInfo->fpL != nullptr && poOpenInfo->nHeaderBytes >= 512 &&
40 3566 : DGNTestOpen(poOpenInfo->pabyHeader, poOpenInfo->nHeaderBytes))
41 : {
42 80 : return TRUE;
43 : }
44 :
45 : // Is this is a DGNv8 file ? If so, and if the DGNV8 driver is not
46 : // available, and we are called from GDALError(), emit an explicit
47 : // error.
48 : VSIStatBuf sStat;
49 99342 : if ((poOpenInfo->nOpenFlags & GDAL_OF_FROM_GDALOPEN) != 0 &&
50 7014 : poOpenInfo->papszAllowedDrivers == nullptr &&
51 7014 : poOpenInfo->fpL != nullptr && poOpenInfo->nHeaderBytes >= 512 &&
52 3312 : memcmp(poOpenInfo->pabyHeader, "\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1", 8) ==
53 6 : 0 &&
54 6 : EQUAL(CPLGetExtension(poOpenInfo->pszFilename), "DGN") &&
55 53179 : VSIStat(poOpenInfo->pszFilename, &sStat) == 0 &&
56 1 : GDALGetDriverByName("DGNV8") == nullptr)
57 : {
58 1 : CPLError(CE_Failure, CPLE_AppDefined,
59 : "`%s' recognized as a DGNv8 dataset, but the DGNv8 driver is "
60 : "not available in this GDAL build. Consult "
61 : "https://gdal.org/drivers/vector/dgnv8.html",
62 : poOpenInfo->pszFilename);
63 : }
64 46164 : return FALSE;
65 : }
66 :
67 : /************************************************************************/
68 : /* Open() */
69 : /************************************************************************/
70 :
71 40 : static GDALDataset *OGRDGNDriverOpen(GDALOpenInfo *poOpenInfo)
72 :
73 : {
74 40 : if (!OGRDGNDriverIdentify(poOpenInfo))
75 0 : return nullptr;
76 :
77 40 : OGRDGNDataSource *poDS = new OGRDGNDataSource();
78 :
79 120 : if (!poDS->Open(poOpenInfo->pszFilename, TRUE,
80 80 : (poOpenInfo->eAccess == GA_Update)) ||
81 40 : poDS->GetLayerCount() == 0)
82 : {
83 0 : delete poDS;
84 0 : return nullptr;
85 : }
86 :
87 40 : return poDS;
88 : }
89 :
90 : /************************************************************************/
91 : /* Create() */
92 : /************************************************************************/
93 :
94 34 : static GDALDataset *OGRDGNDriverCreate(const char *pszName, int /* nBands */,
95 : int /* nXSize */, int /* nYSize */,
96 : GDALDataType /* eDT */,
97 : char **papszOptions)
98 : {
99 : /* -------------------------------------------------------------------- */
100 : /* Return a new OGRDataSource() */
101 : /* -------------------------------------------------------------------- */
102 34 : OGRDGNDataSource *poDS = new OGRDGNDataSource();
103 :
104 34 : if (!poDS->PreCreate(pszName, papszOptions))
105 : {
106 0 : delete poDS;
107 0 : return nullptr;
108 : }
109 :
110 34 : return poDS;
111 : }
112 :
113 : /************************************************************************/
114 : /* RegisterOGRDGN() */
115 : /************************************************************************/
116 :
117 1520 : void RegisterOGRDGN()
118 :
119 : {
120 1520 : if (GDALGetDriverByName("DGN") != nullptr)
121 301 : return;
122 :
123 1219 : GDALDriver *poDriver = new GDALDriver();
124 :
125 1219 : poDriver->SetDescription("DGN");
126 1219 : poDriver->SetMetadataItem(GDAL_DCAP_VECTOR, "YES");
127 1219 : poDriver->SetMetadataItem(GDAL_DCAP_CREATE_LAYER, "YES");
128 1219 : poDriver->SetMetadataItem(GDAL_DMD_LONGNAME, "Microstation DGN");
129 1219 : poDriver->SetMetadataItem(GDAL_DMD_EXTENSION, "dgn");
130 1219 : poDriver->SetMetadataItem(GDAL_DMD_HELPTOPIC, "drivers/vector/dgn.html");
131 1219 : poDriver->SetMetadataItem(GDAL_DCAP_Z_GEOMETRIES, "YES");
132 1219 : poDriver->SetMetadataItem(GDAL_DMD_SUPPORTED_SQL_DIALECTS, "OGRSQL SQLITE");
133 :
134 1219 : poDriver->SetMetadataItem(
135 : GDAL_DMD_CREATIONOPTIONLIST,
136 : "<CreationOptionList>"
137 : " <Option name='3D' type='boolean' description='whether 2D "
138 : "(seed_2d.dgn) or 3D (seed_3d.dgn) seed file should be used. This "
139 : "option is ignored if the SEED option is provided'/>"
140 : " <Option name='SEED' type='string' description='Filename of seed "
141 : "file to use'/>"
142 : " <Option name='COPY_WHOLE_SEED_FILE' type='boolean' "
143 : "description='whether the whole seed file should be copied. If not, "
144 : "only the first three elements (and potentially the color table) will "
145 : "be copied.' default='NO'/>"
146 : " <Option name='COPY_SEED_FILE_COLOR_TABLE' type='boolean' "
147 : "description='whether the color table should be copied from the seed "
148 : "file.' default='NO'/>"
149 : " <Option name='MASTER_UNIT_NAME' type='string' description='Override "
150 : "the master unit name from the seed file with the provided one or two "
151 : "character unit name.'/>"
152 : " <Option name='SUB_UNIT_NAME' type='string' description='Override "
153 : "the master unit name from the seed file with the provided one or two "
154 : "character unit name.'/>"
155 : " <Option name='MASTER_UNIT_NAME' type='string' description='Override "
156 : "the master unit name from the seed file with the provided one or two "
157 : "character unit name.'/>"
158 : " <Option name='SUB_UNIT_NAME' type='string' description='Override "
159 : "the sub unit name from the seed file with the provided one or two "
160 : "character unit name.'/>"
161 : " <Option name='SUB_UNITS_PER_MASTER_UNIT' type='int' "
162 : "description='Override the number of subunits per master unit. By "
163 : "default the seed file value is used.'/>"
164 : " <Option name='UOR_PER_SUB_UNIT' type='int' description='Override "
165 : "the number of UORs (Units of Resolution) per sub unit. By default the "
166 : "seed file value is used.'/>"
167 : " <Option name='ORIGIN' type='string' description='Value as x,y,z. "
168 : "Override the origin of the design plane. By default the origin from "
169 : "the seed file is used.'/>"
170 1219 : "</CreationOptionList>");
171 :
172 1219 : poDriver->SetMetadataItem(GDAL_DS_LAYER_CREATIONOPTIONLIST,
173 1219 : "<LayerCreationOptionList/>");
174 1219 : poDriver->SetMetadataItem(GDAL_DCAP_VIRTUALIO, "YES");
175 1219 : poDriver->SetMetadataItem(GDAL_DCAP_FEATURE_STYLES, "YES");
176 1219 : poDriver->SetMetadataItem(GDAL_DCAP_FEATURE_STYLES_READ, "YES");
177 1219 : poDriver->SetMetadataItem(GDAL_DCAP_FEATURE_STYLES_WRITE, "YES");
178 1219 : poDriver->SetMetadataItem(GDAL_DCAP_MULTIPLE_VECTOR_LAYERS, "YES");
179 :
180 1219 : poDriver->pfnOpen = OGRDGNDriverOpen;
181 1219 : poDriver->pfnIdentify = OGRDGNDriverIdentify;
182 1219 : poDriver->pfnCreate = OGRDGNDriverCreate;
183 :
184 1219 : GetGDALDriverManager()->RegisterDriver(poDriver);
185 : }
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