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/*************************************************************************
** GFReader.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2015 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program 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 3 of **
** the License, or (at your option) any later version. **
** **
** This program 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 this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef DVISVGM_GFREADER_H
#define DVISVGM_GFREADER_H
#include <istream>
#include <map>
#include <string>
#include "Bitmap.h"
#include "MessageException.h"
#include "types.h"
class CharInfo;
struct GFException : public MessageException
{
GFException (const std::string &msg) : MessageException(msg) {}
};
class GFReader
{
struct CharInfo
{
CharInfo () : dx(0), dy(0), width(0), location(0) {}
CharInfo (Int32 dxx, Int32 dyy, Int32 w, UInt32 p) : dx(dxx), dy(dyy), width(w), location(p) {}
Int32 dx, dy;
Int32 width; // 2^24 * (true width)/(design size)
UInt32 location;
};
typedef std::map<UInt8,CharInfo>::iterator Iterator;
typedef std::map<UInt8,CharInfo>::const_iterator ConstIterator;
public:
GFReader (std::istream &is);
virtual ~GFReader () {}
bool executeChar (UInt8 c);
bool executeAllChars ();
bool executePreamble ();
bool executePostamble ();
virtual void preamble (const std::string &str) {}
virtual void postamble () {}
virtual void beginChar (UInt32 c) {}
virtual void endChar (UInt32 c) {}
virtual void special (std::string str) {}
virtual void numspecial (Int32 y) {}
const Bitmap& getBitmap () const {return _bitmap;}
double getDesignSize () const;
double getHPixelsPerPoint () const;
double getVPixelsPerPoint () const;
double getCharWidth (UInt32 c) const;
UInt32 getChecksum () const {return _checksum;}
protected:
Int32 readSigned (int bytes);
UInt32 readUnsigned (int bytes);
std::string readString (int len);
int executeCommand ();
std::istream& getInputStream () const {return _in;}
void cmdPre (int);
void cmdPost (int);
void cmdPostPost (int);
void cmdPaint0 (int pixels);
void cmdPaint (int len);
void cmdBoc (int);
void cmdBoc1 (int);
void cmdEoc (int);
void cmdSkip (int len);
void cmdNewRow (int col);
void cmdXXX (int len);
void cmdYYY (int);
void cmdNop (int);
void cmdCharLoc0 (int);
void cmdCharLoc (int);
private:
std::istream &_in;
Int32 _minX, _maxX, _minY, _maxY;
Int32 _x, _y; // current pen location (pixel units)
Int32 _currentChar;
Bitmap _bitmap; // bitmap of current char
FixWord _designSize; // designSize
ScaledInt _hppp, _vppp; // horizontal and vertical pixel per point
UInt32 _checksum;
std::map<UInt8,CharInfo> _charInfoMap;
bool _penDown;
};
#endif
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