/* catdvi - get text from DVI files Copyright (C) 2000 Bjoern Brill <brill@fs.math.uni-frankfurt.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 2 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, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef GLYPHOPS_H #define GLYPHOPS_H /* for definition of glyph_t */ #include "page.h" /* assorted magic with unicode characters ("glyphs") */ /* bit flags for certain possible properties of glyphs. useful as * hints for correct rendering. Most are still unused. */ enum glyph_hint_t { GH_DIACRITIC = 1 << 0, GH_COMBINING = 1 << 1, GH_NON_SPACING = 1 << 2, GH_GRAPHIC = 1 << 3, GH_MATH = 1 << 4, GH_LIGATURE = 1 << 5, GH_ON_AXIS = 1 << 6, GH_EXTENSIBLE_RECIPE = 1 << 7, /* TeX specific */ GH_WIDE_DIACRITIC = 1 << 8, GH_MOREMATH_LEFT = 1 << 9, /* e.g. for right math delimiters */ GH_RADICAL = 1 << 10 }; #define GH_COMBINING_DIACRITIC (GH_DIACRITIC | GH_COMBINING | GH_NON_SPACING) /* set up internal tables used by the other functions */ void glyphops_init(void); /* returns our ORed wisdom abut the given glyph */ enum glyph_hint_t glyph_get_hint(glyph_t glyph); /* unicode knows two kinds of diacritics: combining diacritics are by * themselves unprintable characters that change the meaning of the * preceding glyph. spacing diacritics are printable (roughly * equivalent to space followed by the corresponding combining diacritic). * * the following functions translate one into the other. idempotent. * return zero on failure. */ glyph_t diacritic_combining_variant(glyph_t diacritic); glyph_t diacritic_spacing_variant(glyph_t diacritic); #endif

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