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/******************************************************************************
** libDXFrw - Library to read/write DXF files (ascii & binary) **
** **
** Copyright (C) 2011-2015 José F. Soriano, rallazz@gmail.com **
** **
** This library is free software, licensed 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. **
** You should have received a copy of the GNU General Public License **
** along with this program. If not, see <http://www.gnu.org/licenses/>. **
******************************************************************************/
#ifndef DWGREADER_H
#define DWGREADER_H
#include <map>
#include <list>
#include "drw_textcodec.h"
#include "dwgutil.h"
#include "dwgbuffer.h"
#include "../libdwgr.h"
class objHandle{
public:
objHandle(){ handle = type = loc = 0; }
objHandle(duint32 t, duint32 h, duint32 l){
type = t;
handle = h;
loc = l;
}
duint32 type;
duint32 handle;
duint32 loc;
};
//until 2000 = 2000-
//since 2004 except 2007 = 2004+
// 2007 = 2007
// pages of section
/* 2000-: No pages, only sections
* 2004+: Id, page number (index)
* size, size of page in file stream
* address, address in file stream
* dataSize, data size for this page
* startOffset, start offset for this page
* cSize, compressed size of data
* uSize, uncompressed size of data
* 2007: page Id, pageCount & pages
* size, size in file
* dataSize
* startOffset, start position in decompressed data stream
* cSize, compressed size of data
* uSize, uncompressed size of data
* address, address in file stream
* */
class dwgPageInfo {
public:
dwgPageInfo(){}
dwgPageInfo(duint64 i, duint64 ad, duint32 sz){
Id=i; address=ad; size=sz;
}
~dwgPageInfo(){}
duint64 Id;
duint64 address; //in file stream, for rd18, rd21
duint64 size; //in file stream, for rd18, rd21
duint64 dataSize; //for rd18, rd21
duint32 startOffset; //for rd18, rd21
duint64 cSize; //compressed page size, for rd21
duint64 uSize; //uncompressed page size, for rd21
};
// sections of file
/* 2000-: No pages, only section Id, size & address in file
* 2004+: Id, Section Id
* size, total size of uncompressed data
* pageCount & pages, number of pages in section
* maxSize, max decompressed Size per page
* compressed, (1 = no, 2 = yes, normally 2)
* encrypted, (0 = no, 1 = yes, 2 = unknown)
* name, read & stored but not used
* 2007: same as 2004+ except encoding, saved in compressed field
* */
class dwgSectionInfo {
public:
dwgSectionInfo(){
compressed = 1;//1=no, 2=yes
encrypted = 0;//???
pageCount = 0;
Id=-1;
}
~dwgSectionInfo(){}
dint32 Id; //section Id, 2000- rd15 rd18
std::string name; //section name rd18
duint32 compressed;//is compressed? 1=no, 2=yes rd18, rd21(encoding)
duint32 encrypted;//encrypted (doc: 0=no, 1=yes, 2=unkn) on read: objects 0 and encrypted yes rd18
std::map<duint32, dwgPageInfo >pages;//index, size, offset
duint64 size;//size of section, 2000- rd15, rd18, rd21 (data size)
duint64 pageCount; //number of pages (dwgPageInfo) in section rd18, rd21
duint64 maxSize; //max decompressed size (needed??) rd18 rd21
duint64 address; //address (seek) , 2000-
};
//! Class to handle dwg obj control entries
/*!
* Class to handle dwg obj control entries
* @author Rallaz
*/
class DRW_ObjControl : public DRW_TableEntry {
public:
DRW_ObjControl() { reset();}
void reset(){
}
bool parseDwg(DRW::Version version, dwgBuffer *buf, duint32 bs=0);
std::list<duint32>hadlesList;
};
class dwgReader {
friend class dwgR;
public:
dwgReader(std::istream *stream, dwgR *p){
fileBuf = new dwgBuffer(stream);
parent = p;
decoder.setVersion(DRW::AC1021, false);//default 2007 in utf8(no convert)
decoder.setCodePage("UTF-16", false);
// blockCtrl=0; //RLZ: temporary
// blockCtrl=layerCtrl=styleCtrl=linetypeCtrl=viewCtrl=0;
// ucsCtrl=vportCtrl=appidCtrl=dimstyleCtrl=vpEntHeaderCtrl=0;
nextEntLink = prevEntLink = 0;
maintenanceVersion=0;
}
virtual ~dwgReader();
protected:
virtual bool readMetaData() = 0;
virtual bool readPreview(){return false;}
virtual bool readFileHeader() = 0;
virtual bool readDwgHeader(DRW_Header& hdr)=0;
virtual bool readDwgClasses() = 0;
virtual bool readDwgHandles() = 0;
virtual bool readDwgTables(DRW_Header& hdr)=0;
virtual bool readDwgBlocks(DRW_Interface& intfa) = 0;
virtual bool readDwgEntities(DRW_Interface& intfa) = 0;
virtual bool readDwgObjects(DRW_Interface& intfa) = 0;
virtual bool readDwgEntity(dwgBuffer *dbuf, objHandle& obj, DRW_Interface& intfa);
bool readDwgObject(dwgBuffer *dbuf, objHandle& obj, DRW_Interface& intfa);
void parseAttribs(DRW_Entity* e);
std::string findTableName(DRW::TTYPE table, dint32 handle);
void setCodePage(std::string *c){decoder.setCodePage(c, false);}
std::string getCodePage(){ return decoder.getCodePage();}
bool readDwgHeader(DRW_Header& hdr, dwgBuffer *buf, dwgBuffer *hBuf);
bool readDwgHandles(dwgBuffer *dbuf, duint32 offset, duint32 size);
bool readDwgTables(DRW_Header& hdr, dwgBuffer *dbuf);
bool checkSentinel(dwgBuffer *buf, enum secEnum::DWGSection, bool start);
bool readDwgBlocks(DRW_Interface& intfa, dwgBuffer *dbuf);
bool readDwgEntities(DRW_Interface& intfa, dwgBuffer *dbuf);
bool readDwgObjects(DRW_Interface& intfa, dwgBuffer *dbuf);
bool readPlineVertex(DRW_Polyline& pline, dwgBuffer *dbuf);
public:
std::map<duint32, objHandle>ObjectMap;
std::map<duint32, objHandle>objObjectMap; //stores the objects & entities not read in readDwgEntities
std::map<duint32, objHandle>remainingMap; //stores the objects & entities not read in all processes, for debug only
std::map<duint32, DRW_LType*> ltypemap;
std::map<duint32, DRW_Layer*> layermap;
std::map<duint32, DRW_Block*> blockmap;
std::map<duint32, DRW_Textstyle*> stylemap;
std::map<duint32, DRW_Dimstyle*> dimstylemap;
std::map<duint32, DRW_Vport*> vportmap;
std::map<duint32, DRW_Block_Record*> blockRecordmap;
std::map<duint32, DRW_AppId*> appIdmap;
// duint32 currBlock;
duint8 maintenanceVersion;
protected:
dwgBuffer *fileBuf;
dwgR *parent;
DRW::Version version;
//seeker (position) for the beginning sentinel of the image data (R13 to R15)
duint32 previewImagePos;
//sections map
std::map<enum secEnum::DWGSection, dwgSectionInfo >sections;
std::map<duint32, DRW_Class*> classesmap;
protected:
DRW_TextCodec decoder;
protected:
// duint32 blockCtrl;
duint32 nextEntLink;
duint32 prevEntLink;
};
#endif // DWGREADER_H
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