void OGRDXFDataSource::ReadLayerDefinition()
{
char szLineBuf[257];
int nCode;
std::map<CPLString,CPLString> oLayerProperties;
CPLString osLayerName = "";
oLayerProperties["Hidden"] = "0";
while( (nCode = ReadValue( szLineBuf, sizeof(szLineBuf) )) > 0 )
{
switch( nCode )
{
case 2:
osLayerName = ACTextUnescape(szLineBuf,GetEncoding());
oLayerProperties["Exists"] = "1";
break;
case 6:
oLayerProperties["Linetype"] = ACTextUnescape(szLineBuf,
GetEncoding());
break;
case 62:
oLayerProperties["Color"] = szLineBuf;
if( atoi(szLineBuf) < 0 ) // Is layer off?
oLayerProperties["Hidden"] = "1";
break;
case 70:
oLayerProperties["Flags"] = szLineBuf;
if( atoi(szLineBuf) & 0x01 ) // Is layer frozen?
oLayerProperties["Hidden"] = "1";
break;
case 370:
case 39:
oLayerProperties["LineWeight"] = szLineBuf;
break;
default:
break;
}
}
if( oLayerProperties.size() > 0 )
oLayerTable[osLayerName] = oLayerProperties;
if( nCode == 0 )
UnreadValue();
}
void OGRDXFDataSource::ReadLayerDefinition()
{
char szLineBuf[257];
int nCode;
std::map<CPLString,CPLString> oLayerProperties;
CPLString osLayerName = "";
while( (nCode = ReadValue( szLineBuf, sizeof(szLineBuf) )) > 0 )
{
switch( nCode )
{
case 2:
osLayerName = szLineBuf;
oLayerProperties["Exists"] = "1";
break;
case 6:
oLayerProperties["Linetype"] = szLineBuf;
break;
case 62:
oLayerProperties["Color"] = szLineBuf;
break;
case 70:
oLayerProperties["Flags"] = szLineBuf;
break;
case 370:
case 39:
oLayerProperties["LineWeight"] = szLineBuf;
break;
default:
break;
}
}
if( oLayerProperties.size() > 0 )
oLayerTable[osLayerName] = oLayerProperties;
UnreadValue();
}
void OGRDXFDataSource::ReadLineTypeDefinition()
{
char szLineBuf[257];
int nCode;
CPLString osLineTypeName;
CPLString osLineTypeDef;
while( (nCode = ReadValue( szLineBuf, sizeof(szLineBuf) )) > 0 )
{
switch( nCode )
{
case 2:
osLineTypeName = ACTextUnescape(szLineBuf,GetEncoding());
break;
case 49:
{
if( osLineTypeDef != "" )
osLineTypeDef += " ";
if( szLineBuf[0] == '-' )
osLineTypeDef += szLineBuf+1;
else
osLineTypeDef += szLineBuf;
osLineTypeDef += "g";
}
break;
default:
break;
}
}
if( osLineTypeDef != "" )
oLineTypeTable[osLineTypeName] = osLineTypeDef;
if( nCode == 0 )
UnreadValue();
}
void OGRDXFDataSource::ReadHeaderSection()
{
char szLineBuf[257];
int nCode;
while( (nCode = ReadValue( szLineBuf, sizeof(szLineBuf) )) > -1
&& !EQUAL(szLineBuf,"ENDSEC") )
{
if( nCode != 9 )
continue;
CPLString osName = szLineBuf;
ReadValue( szLineBuf, sizeof(szLineBuf) );
CPLString osValue = szLineBuf;
oHeaderVariables[osName] = osValue;
}
if (nCode != -1)
{
nCode = ReadValue( szLineBuf, sizeof(szLineBuf) );
UnreadValue();
}
/* Unusual DXF files produced by dxflib */
/* such as http://www.ribbonsoft.com/library/architecture/plants/decd5.dxf */
/* where there is a spurious ENDSEC in the middle of the header variables */
if (nCode == 9 && EQUALN(szLineBuf,"$", 1) )
{
while( (nCode = ReadValue( szLineBuf, sizeof(szLineBuf) )) > -1
&& !EQUAL(szLineBuf,"ENDSEC") )
{
if( nCode != 9 )
continue;
CPLString osName = szLineBuf;
ReadValue( szLineBuf, sizeof(szLineBuf) );
CPLString osValue = szLineBuf;
oHeaderVariables[osName] = osValue;
}
}
CPLDebug( "DXF", "Read %d header variables.",
(int) oHeaderVariables.size() );
/* -------------------------------------------------------------------- */
/* Decide on what CPLRecode() name to use for the files */
/* encoding or allow the encoding to be overridden. */
/* -------------------------------------------------------------------- */
CPLString osCodepage = GetVariable( "$DWGCODEPAGE", "ANSI_1252" );
// not strictly accurate but works even without iconv.
if( osCodepage == "ANSI_1252" )
osEncoding = CPL_ENC_ISO8859_1;
else if( EQUALN(osCodepage,"ANSI_",5) )
{
osEncoding = "CP";
osEncoding += osCodepage + 5;
}
else
{
// fallback to the default
osEncoding = CPL_ENC_ISO8859_1;
}
if( CPLGetConfigOption( "DXF_ENCODING", NULL ) != NULL )
osEncoding = CPLGetConfigOption( "DXF_ENCODING", NULL );
if( osEncoding != CPL_ENC_ISO8859_1 )
CPLDebug( "DXF", "Treating DXF as encoding '%s', $DWGCODEPAGE='%s'",
osEncoding.c_str(), osCodepage.c_str() );
}
void OGRDXFDataSource::ReadBlocksSection()
{
char szLineBuf[257];
int nCode;
OGRDXFLayer *poReaderLayer = (OGRDXFLayer *) GetLayerByName( "Entities" );
iEntitiesSectionOffset = oReader.iSrcBufferFileOffset + oReader.iSrcBufferOffset;
while( (nCode = ReadValue( szLineBuf, sizeof(szLineBuf) )) > -1
&& !EQUAL(szLineBuf,"ENDSEC") )
{
// We are only interested in extracting blocks.
if( nCode != 0 || !EQUAL(szLineBuf,"BLOCK") )
continue;
// Process contents of BLOCK definition till we find the
// first entity.
CPLString osBlockName;
while( (nCode = ReadValue( szLineBuf,sizeof(szLineBuf) )) > 0 )
{
if( nCode == 2 )
osBlockName = szLineBuf;
// anything else we want?
}
if( EQUAL(szLineBuf,"ENDBLK") )
continue;
UnreadValue();
// Now we will process entities till we run out at the ENDBLK code.
// we aggregate the geometries of the features into a multi-geometry,
// but throw away other stuff attached to the features.
OGRFeature *poFeature;
OGRGeometryCollection *poColl = new OGRGeometryCollection();
std::vector<OGRFeature*> apoFeatures;
while( (poFeature = poReaderLayer->GetNextUnfilteredFeature()) != NULL )
{
if( poFeature->GetStyleString() != NULL
&& strstr(poFeature->GetStyleString(),"LABEL") != NULL )
{
apoFeatures.push_back( poFeature );
}
else
{
poColl->addGeometryDirectly( poFeature->StealGeometry() );
delete poFeature;
}
}
if( poColl->getNumGeometries() == 0 )
delete poColl;
else
oBlockMap[osBlockName].poGeometry = SimplifyBlockGeometry(poColl);
if( apoFeatures.size() > 0 )
oBlockMap[osBlockName].apoFeatures = apoFeatures;
}
CPLDebug( "DXF", "Read %d blocks with meaningful geometry.",
(int) oBlockMap.size() );
}
