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+/*************************************************************************
+** GlyfTable.hpp **
+** **
+** This file is part of dvisvgm -- a fast DVI to SVG converter **
+** Copyright (C) 2005-2023 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/>. **
+*************************************************************************/
+
+#pragma once
+#include <cmath>
+#include <list>
+#include <ostream>
+#include <vector>
+#include "TTFTable.hpp"
+#include "../Pair.hpp"
+
+namespace ttf {
+
+struct PointInfo {
+ enum State {OFFCURVE, ONCURVE, REMOVED};
+
+ PointInfo (double x, double y, bool oncurve) : coords(std::round(x), std::round(y)), state(oncurve ? ONCURVE : OFFCURVE) {}
+ PointInfo (int x, int y) : coords(x, y), state(ONCURVE) {}
+ bool oncurve () const {return state == ONCURVE;}
+ bool offcurve () const {return state == OFFCURVE;}
+ bool removed () const {return state == REMOVED;}
+ void markForRemoval () {state = REMOVED;}
+ Pair<int> coords; ///< relative coordinates to previous one in contour
+ State state;
+};
+
+
+class Contour {
+ friend class GlyfTable;
+ using Iterator = std::vector<PointInfo>::iterator;
+ using ConstIterator = std::vector<PointInfo>::const_iterator;
+ public:
+ Contour () =default;
+ Contour (Contour &&contour) =default;
+ Contour (std::list<Contour> &&contours);
+ Contour (const Contour &contour) =delete;
+ Iterator begin () {return _pointInfos.begin();}
+ Iterator end () {return _pointInfos.end();}
+ ConstIterator begin () const {return _pointInfos.begin();}
+ ConstIterator end () const {return _pointInfos.end();}
+ size_t numPoints () const {return _pointInfos.size();}
+ const PointInfo& operator [] (size_t pos) const {return _pointInfos[pos];}
+ bool empty () const {return _pointInfos.empty();}
+ std::vector<uint8_t> glyphFlags () const;
+ void reverse ();
+ void reduceNumberOfPoints ();
+ void append (PointInfo &&pinfo) {_pointInfos.emplace_back(std::move(pinfo));}
+ void reserve (size_t n) {_pointInfos.reserve(n);}
+
+ protected:
+ void convertAbsoluteToRelative ();
+#ifdef TTFDEBUG
+ void writePS (std::ostream &os) const;
+#endif
+
+ private:
+ std::vector<PointInfo> _pointInfos;
+};
+
+
+/** This class provides the functions required to write the glyf data table of a TTF/OTF font.
+ * https://www.microsoft.com/typography/otspec/glyf.htm */
+class GlyfTable : public TTFTable {
+ public:
+ uint32_t tag () const override {return name2id("glyf");}
+ void write (std::ostream &os) const override;
+
+ protected:
+ std::vector<Contour> computeContours () const;
+ std::list<Contour> computeContours (uint32_t charcode) const;
+ static void computeBbox (const std::list<Contour> &contours, int &xmin, int &ymin, int &xmax, int &ymax);
+ size_t writeGlyphContours (std::ostream &os, uint32_t charcode) const;
+// Contour getNotDefContour () const;
+#ifdef TTFDEBUG
+ void writePS (std::ostream &os, const std::list<Contour> &contours, uint32_t charcode) const;
+#endif
+};
+
+} // namespace ttf \ No newline at end of file