/usr/include/hersheyfont.h is in libhersheyfont-dev 0.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// hersheyfont.h - Copyright (C) 2013 Kamal Mostafa <kamal@whence.com>
//
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#ifndef HERSHEYFONT_H
#define HERSHEYFONT_H
struct hershey_vertex {
short x;
short y;
};
struct hershey_path {
struct hershey_path *next;
unsigned short nverts;
struct hershey_vertex verts[];
};
struct hershey_glyph {
unsigned int glyphnum;
unsigned short width;
unsigned short npaths;
struct hershey_path *paths;
};
struct hershey_font {
struct hershey_glyph glyphs[256]; /* indexed by ASCII value */
};
//
// Load Hershey fontname (e.g. "rowmans") into a new struct hershey_font.
// The associated .jhf font file will be loaded from .../share/hershey-fonts/.
//
struct hershey_font * hershey_font_load( const char *fontname );
//
// Load a Hershey font .jhf file into a new struct hershey_font.
//
struct hershey_font * hershey_jhf_font_load( const char *jhffile );
//
// Return a pointer to the struct hershey_glyph for ASCII character c.
//
struct hershey_glyph * hershey_font_glyph( struct hershey_font *hf,
unsigned char c );
//
// Free a hershey_font allocated by hershey_font_load or hershey_jhf_font_load.
//
void hershey_font_free( struct hershey_font *hf );
#endif // HERSHEYFONT_H
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