1 : /******************************************************************************
2 : * $Id: ogr_dxf.h 18752 2010-02-07 22:02:14Z warmerdam $
3 : *
4 : * Project: DXF Translator
5 : * Purpose: Definition of classes for OGR .dxf driver.
6 : * Author: Frank Warmerdam, warmerdam@pobox.com
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2009, Frank Warmerdam
10 : *
11 : * Permission is hereby granted, free of charge, to any person obtaining a
12 : * copy of this software and associated documentation files (the "Software"),
13 : * to deal in the Software without restriction, including without limitation
14 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 : * and/or sell copies of the Software, and to permit persons to whom the
16 : * Software is furnished to do so, subject to the following conditions:
17 : *
18 : * The above copyright notice and this permission notice shall be included
19 : * in all copies or substantial portions of the Software.
20 : *
21 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 : * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 : * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 : * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 : * DEALINGS IN THE SOFTWARE.
28 : ****************************************************************************/
29 :
30 : #ifndef _OGR_DXF_H_INCLUDED
31 : #define _OGR_DXF_H_INCLUDED
32 :
33 : #include "ogrsf_frmts.h"
34 : #include "cpl_conv.h"
35 : #include <vector>
36 : #include <map>
37 : #include <stack>
38 :
39 : class OGRDXFDataSource;
40 :
41 : /************************************************************************/
42 : /* DXFBlockDefinition */
43 : /* */
44 : /* Container for info about a block. */
45 : /************************************************************************/
46 :
47 : class DXFBlockDefinition
48 2 : {
49 : public:
50 1 : DXFBlockDefinition() : poGeometry(NULL) {}
51 : ~DXFBlockDefinition();
52 :
53 : OGRGeometry *poGeometry;
54 : std::vector<OGRFeature *> apoFeatures;
55 : };
56 :
57 : /************************************************************************/
58 : /* OGRDXFLayer */
59 : /************************************************************************/
60 : class OGRDXFDataSource;
61 :
62 : class OGRDXFLayer : public OGRLayer
63 : {
64 : OGRDXFDataSource *poDS;
65 :
66 : OGRFeatureDefn *poFeatureDefn;
67 : int iNextFID;
68 :
69 : std::stack<OGRFeature*> apoPendingFeatures;
70 : void ClearPendingFeatures();
71 :
72 : std::map<CPLString,CPLString> oStyleProperties;
73 :
74 : void TranslateGenericProperty( OGRFeature *poFeature,
75 : int nCode, char *pszValue );
76 : void PrepareLineStyle( OGRFeature *poFeature );
77 : void ApplyOCSTransformer( OGRGeometry * );
78 :
79 : OGRFeature * TranslatePOINT();
80 : OGRFeature * TranslateLINE();
81 : OGRFeature * TranslatePOLYLINE();
82 : OGRFeature * TranslateLWPOLYLINE();
83 : OGRFeature * TranslateCIRCLE();
84 : OGRFeature * TranslateELLIPSE();
85 : OGRFeature * TranslateARC();
86 : OGRFeature * TranslateSPLINE();
87 : OGRFeature * TranslateINSERT();
88 : OGRFeature * TranslateMTEXT();
89 : OGRFeature * TranslateTEXT();
90 : OGRFeature * TranslateDIMENSION();
91 :
92 : void FormatDimension( CPLString &osText, double dfValue );
93 :
94 : public:
95 : OGRDXFLayer( OGRDXFDataSource *poDS );
96 : ~OGRDXFLayer();
97 :
98 : void ResetReading();
99 : OGRFeature * GetNextFeature();
100 :
101 2 : OGRFeatureDefn * GetLayerDefn() { return poFeatureDefn; }
102 :
103 : int TestCapability( const char * );
104 :
105 : OGRFeature * GetNextUnfilteredFeature();
106 : };
107 :
108 : /************************************************************************/
109 : /* OGRDXFDataSource */
110 : /************************************************************************/
111 :
112 : class OGRDXFDataSource : public OGRDataSource
113 : {
114 : CPLString osName;
115 : std::vector<OGRDXFLayer*> apoLayers;
116 :
117 : FILE *fp;
118 :
119 : int iEntitiesSectionOffset;
120 :
121 : int iSrcBufferOffset;
122 : int nSrcBufferBytes;
123 : int iSrcBufferFileOffset;
124 : char achSrcBuffer[1025];
125 :
126 : int nLastValueSize;
127 :
128 : std::map<CPLString,DXFBlockDefinition> oBlockMap;
129 : std::map<CPLString,CPLString> oHeaderVariables;
130 :
131 : // indexed by layer name, then by property name.
132 : std::map< CPLString, std::map<CPLString,CPLString> >
133 : oLayerTable;
134 :
135 : public:
136 : OGRDXFDataSource();
137 : ~OGRDXFDataSource();
138 :
139 : int Open( const char * pszFilename );
140 :
141 6 : const char *GetName() { return osName; }
142 :
143 1 : int GetLayerCount() { return apoLayers.size(); }
144 : OGRLayer *GetLayer( int );
145 :
146 : int TestCapability( const char * );
147 :
148 : // The following is only used by OGRDXFLayer
149 :
150 : // Implemented in ogrdxf_diskio.cpp
151 : int ReadValue( char *pszValueBuffer,
152 : int nValueBufferSize = 81 );
153 : void UnreadValue();
154 : void LoadDiskChunk();
155 : void ResetReadPointer( int iNewOffset );
156 9 : void RestartEntities()
157 9 : { ResetReadPointer(iEntitiesSectionOffset); }
158 :
159 : // Implemented in ogrdxf_blockmap.cpp
160 : void ReadBlocksSection();
161 : OGRGeometry *SimplifyBlockGeometry( OGRGeometryCollection * );
162 : DXFBlockDefinition *LookupBlock( const char *pszName );
163 :
164 : // Layer Table Handling (ogrdxf_tables.cpp)
165 : void ReadTablesSection();
166 : void ReadLayerDefinition();
167 : const char *LookupLayerProperty( const char *pszLayer,
168 : const char *pszProperty );
169 :
170 : // Header variables.
171 : void ReadHeaderSection();
172 : const char *GetVariable(const char *pszName,
173 : const char *pszDefault=NULL );
174 : };
175 :
176 : /************************************************************************/
177 : /* OGRDXFWriterLayer */
178 : /************************************************************************/
179 :
180 : class OGRDXFWriterDS;
181 :
182 : class OGRDXFWriterLayer : public OGRLayer
183 : {
184 : FILE *fp;
185 : OGRFeatureDefn *poFeatureDefn;
186 : int nNextFID;
187 :
188 : int WriteValue( int nCode, const char *pszValue );
189 : int WriteValue( int nCode, int nValue );
190 : int WriteValue( int nCode, double dfValue );
191 :
192 : OGRErr WriteCore( OGRFeature* );
193 : OGRErr WritePOINT( OGRFeature* );
194 : OGRErr WriteTEXT( OGRFeature* );
195 : OGRErr WritePOLYLINE( OGRFeature*, OGRGeometry* = NULL );
196 :
197 : int ColorStringToDXFColor( const char * );
198 :
199 : public:
200 : OGRDXFWriterLayer( FILE *fp );
201 : ~OGRDXFWriterLayer();
202 :
203 0 : void ResetReading() {}
204 0 : OGRFeature *GetNextFeature() { return NULL; }
205 :
206 2 : OGRFeatureDefn * GetLayerDefn() { return poFeatureDefn; }
207 :
208 : int TestCapability( const char * );
209 : OGRErr CreateFeature( OGRFeature *poFeature );
210 : OGRErr CreateField( OGRFieldDefn *poField,
211 : int bApproxOK = TRUE );
212 : };
213 :
214 : /************************************************************************/
215 : /* OGRDXFWriterDS */
216 : /************************************************************************/
217 :
218 : class OGRDXFWriterDS : public OGRDataSource
219 : {
220 : CPLString osName;
221 : OGRDXFWriterLayer *poLayer;
222 : FILE *fp;
223 : CPLString osTrailerFile;
224 :
225 : public:
226 : OGRDXFWriterDS();
227 : ~OGRDXFWriterDS();
228 :
229 : int Open( const char * pszFilename,
230 : char **papszOptions );
231 :
232 1 : const char *GetName() { return osName; }
233 :
234 : int GetLayerCount();
235 : OGRLayer *GetLayer( int );
236 :
237 : int TestCapability( const char * );
238 :
239 : OGRLayer *CreateLayer( const char *pszName,
240 : OGRSpatialReference *poSpatialRef = NULL,
241 : OGRwkbGeometryType eGType = wkbUnknown,
242 : char ** papszOptions = NULL );
243 :
244 : };
245 :
246 : /************************************************************************/
247 : /* OGRDXFDriver */
248 : /************************************************************************/
249 :
250 : class OGRDXFDriver : public OGRSFDriver
251 80 : {
252 : public:
253 : ~OGRDXFDriver();
254 :
255 : static const unsigned char *GetDXFColorTable();
256 :
257 : const char *GetName();
258 : OGRDataSource *Open( const char *, int );
259 : int TestCapability( const char * );
260 :
261 : OGRDataSource *CreateDataSource( const char *pszName,
262 : char ** = NULL );
263 : };
264 :
265 : #endif /* ndef _OGR_DXF_H_INCLUDED */
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