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/*************************************************************************
** FontMetrics.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2014 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_FONTMETRICS_H
#define DVISVGM_FONTMETRICS_H
#include <istream>
#include "MessageException.h"
#include "types.h"
struct FontMetrics
{
virtual ~FontMetrics () {}
virtual double getDesignSize () const =0;
virtual double getCharWidth (int c) const =0;
virtual double getCharHeight (int c) const =0;
virtual double getCharDepth (int c) const =0;
virtual double getItalicCorr (int c) const =0;
virtual bool verticalLayout () const =0;
virtual UInt32 getChecksum () const =0;
virtual UInt16 firstChar () const =0;
virtual UInt16 lastChar () const =0;
static FontMetrics* read (const char *fontname);
};
struct NullFontMetric : public FontMetrics
{
double getDesignSize () const {return 1;}
double getCharWidth (int c) const {return 0;}
double getCharHeight (int c) const {return 0;}
double getCharDepth (int c) const {return 0;}
double getItalicCorr (int c) const {return 0;}
bool verticalLayout () const {return false;}
UInt32 getChecksum () const {return 0;}
UInt16 firstChar () const {return 0;}
UInt16 lastChar () const {return 0;}
};
struct FontMetricException : public MessageException
{
FontMetricException (const std::string &msg) : MessageException(msg) {}
};
#endif
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