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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvisvgm/src/FontMetrics.hpp
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+/*************************************************************************
+** FontMetrics.hpp **
+** **
+** This file is part of dvisvgm -- a fast DVI to SVG converter **
+** Copyright (C) 2005-2019 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 FONTMETRICS_HPP
+#define FONTMETRICS_HPP
+
+#include <istream>
+#include <memory>
+#include <string>
+#include "MessageException.hpp"
+
+struct FontMetrics {
+ virtual ~FontMetrics () =default;
+ 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 double getSpace () const =0;
+ virtual double getSpaceStretch () const =0;
+ virtual double getSpaceShrink () const =0;
+ virtual double getQuad () const =0;
+ virtual double getAscent () const =0;
+ virtual double getDescent () const =0;
+ virtual bool verticalLayout () const =0;
+ virtual uint32_t getChecksum () const =0;
+ virtual uint16_t firstChar () const =0;
+ virtual uint16_t lastChar () const =0;
+ static std::unique_ptr<FontMetrics> read (const std::string &fontname);
+};
+
+
+struct NullFontMetric : public FontMetrics {
+ double getDesignSize () const override {return 1;}
+ double getCharWidth (int c) const override {return 0;}
+ double getCharHeight (int c) const override {return 0;}
+ double getCharDepth (int c) const override {return 0;}
+ double getItalicCorr (int c) const override {return 0;}
+ double getSpace () const override {return 0;}
+ double getSpaceStretch () const override {return 0;}
+ double getSpaceShrink () const override {return 0;}
+ double getQuad () const override {return 0;}
+ double getAscent () const override {return 0;}
+ double getDescent () const override {return 0;}
+ bool verticalLayout () const override {return false;}
+ uint32_t getChecksum () const override {return 0;}
+ uint16_t firstChar () const override {return 0;}
+ uint16_t lastChar () const override {return 0;}
+};
+
+
+struct FontMetricException : public MessageException {
+ explicit FontMetricException (const std::string &msg) : MessageException(msg) {}
+};
+
+#endif