diff options
Diffstat (limited to 'dviware/dvisvgm/src/ttf/GlyfTable.hpp')
-rw-r--r-- | dviware/dvisvgm/src/ttf/GlyfTable.hpp | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/dviware/dvisvgm/src/ttf/GlyfTable.hpp b/dviware/dvisvgm/src/ttf/GlyfTable.hpp new file mode 100644 index 0000000000..5ff80559a5 --- /dev/null +++ b/dviware/dvisvgm/src/ttf/GlyfTable.hpp @@ -0,0 +1,96 @@ +/************************************************************************* +** 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 |