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/* tex-glyph.h: look for a TeX glyph font (GF or PK).
Copyright 1993, 2008, 2009, 2011, 2018 Karl Berry.
Copyright 1999, 2005 Olaf Weber.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, see <http://www.gnu.org/licenses/>. */
#ifndef KPATHSEA_TEX_GLYPH_H
#define KPATHSEA_TEX_GLYPH_H
#include <kpathsea/tex-file.h>
#ifdef __cplusplus
extern "C" {
#endif
/* This type describes the origin of a glyph font. */
typedef enum
{
kpse_glyph_source_normal, /* the searched-for font: already existed */
kpse_glyph_source_alias, /* : was an alias for an existing file */
kpse_glyph_source_maketex, /* : was created on the fly */
kpse_glyph_source_fallback_res, /* : found at fallback resolutions */
kpse_glyph_source_fallback /* : wasn't found, but the fallback font was */
} kpse_glyph_source_type;
typedef struct
{
const_string name; /* font name found */
unsigned dpi; /* size found, for glyphs */
kpse_file_format_type format; /* glyph format found */
kpse_glyph_source_type source; /* where we found it */
} kpse_glyph_file_type;
#define KPSE_GLYPH_FILE_NAME(f) ((f).name)
#define KPSE_GLYPH_FILE_DPI(f) ((f).dpi)
#define KPSE_GLYPH_FILE_FORMAT(f) ((f).format)
#define KPSE_GLYPH_FILE_SOURCE(f) ((f).source)
/* Search first for the font named FONT_NAME at resolution DPI in the
glyph format FORMAT (see `try_size' for details of format searching).
Then try resolutions within KPSE_BITMAP_TOLERANCE of DPI. Then if
FONT_NAME is an alias defined in a texfonts.map do all the above for
its real name. If not an alias, try creating it on the fly with
mktexpk. Then try the resolutions in `kpse_fallback_sizes', then
within the tolerance of each of those. Then try the above for
kpse_fallback_name. Then fail. Return either the filename found, or
NULL. Also return information about the file found in
*GLYPH_FILE. */
extern KPSEDLL string kpathsea_find_glyph (kpathsea kpse,
const_string font_name, unsigned dpi,
kpse_file_format_type format,
kpse_glyph_file_type *glyph_file);
/* Defines how far away a pixel file can be found from its stated size.
The DVI standard says any resolution within 0.2% of the stated size
is ok, but we are more forgiving. */
#define KPSE_BITMAP_TOLERANCE(r) ((r) / 500.0 + 1)
/* Check whether DPI1 is within KPSE_BITMAP_TOLERANCE of DPI2. */
extern KPSEDLL boolean kpathsea_bitmap_tolerance (kpathsea kpse,
double dpi1, double dpi2);
#if defined (KPSE_COMPAT_API)
extern KPSEDLL string kpse_find_glyph (const_string font_name, unsigned dpi,
kpse_file_format_type format,
kpse_glyph_file_type *glyph_file);
/* Look for a specific format only. */
#define kpse_find_pk(font_name, dpi, glyph_file) \
kpse_find_glyph (font_name, dpi, kpse_pk_format, glyph_file)
#define kpse_find_gf(font_name, dpi, glyph_file) \
kpse_find_glyph (font_name, dpi, kpse_gf_format, glyph_file)
extern KPSEDLL boolean kpse_bitmap_tolerance (double dpi1, double dpi2);
#endif
#ifdef __cplusplus
}
#endif
#endif /* not KPATHSEA_TEX_GLYPH_H */
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