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diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/FontMetrics.h b/Build/source/texk/dvisvgm/dvisvgm-src/src/FontMetrics.h
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+/*************************************************************************
+** FontMetrics.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_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