/usr/share/doc/libhersheyfont/examples/hershey-font-example.c 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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// hershey-font-example.c - 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.
//
#include <hersheyfont.h>
#include <stdio.h>
int
main( int argc, char **argv )
{
const char *render_text = "HELLO";
//
// Load a Hershey font with hershey_font_load().
//
const char *fontname = "rowmans";
struct hershey_font *hf = hershey_font_load(fontname);
if ( !hf ) {
perror(fontname);
return 1;
}
//
// Render each character's line paths with hershey_font_glyph().
//
int x_render_pos = 0;
const char *p;
for ( p=render_text; *p; p++ ) {
// get the character c to be rendered
int c = *p;
// get the hershey_glyph for character c
// and check whether there actually is a glyph for this character
struct hershey_glyph *hg = hershey_font_glyph(hf, c);
if ( hg->width == 0 )
continue;
printf("# %c\n", c);
// walk the paths-list for this glyph
struct hershey_path *hp;
for ( hp=hg->paths; hp; hp=hp->next ) {
// begin draw path
printf("\t");
int i;
for ( i=0; i<hp->nverts; i++ ) {
short x = hp->verts[i].x + x_render_pos;
short y = hp->verts[i].y;
printf(" {%d,%d}", x, y);
}
// end draw path
printf("\n");
}
// advance the x_render_pos by the width of this glyph
x_render_pos += hg->width;
}
//
// Destroy the hershey_font with hershey_font_free().
//
hershey_font_free(hf);
return 0;
}
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