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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/ttf/HmtxTable.hpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/ttf/HmtxTable.hpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/ttf/HmtxTable.hpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/ttf/HmtxTable.hpp new file mode 100644 index 00000000000..95c9eba513f --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/ttf/HmtxTable.hpp @@ -0,0 +1,52 @@ +/************************************************************************* +** HmtxTable.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 <vector> +#include "TTFTable.hpp" + +namespace ttf { + +/** This class provides the functions required to write the horizontal metrics table of a TTF/OTF font. + * https://www.microsoft.com/typography/otspec/hmtx.htm */ +class HmtxTable : public TTFTable { + friend TTFWriter; + struct CharWidthInfo { + CharWidthInfo (int16_t l, int16_t w) : lsb(l), advWidth(w) {} + uint16_t lsb; // left side bearing + uint16_t advWidth; // unscaled advance width + }; + public: + uint32_t tag () const override {return name2id("hmtx");} + void write (std::ostream &os) const override; + bool isFixedPitch () const {return _isFixedPitch;} + + protected: + void updateWidthData (uint32_t c, int16_t xmin, int16_t xmax); + + private: + std::vector<CharWidthInfo> _widthInfos; + size_t _runLengthOfAdvWidth=0; // number of identical advWidth values at end of _widthInfos + bool _isFixedPitch=true; + int16_t _width=0; +}; + +} // namespace ttf |