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/* 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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