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//
// hershey-font-gnuplot.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>
#include <string.h>
#include <getopt.h>
#include <stdlib.h>
int sample_sheet_mode = 1;
char *render_text;
void
usage()
{
fprintf(stderr,
"usage: hershey-font-gnuplot [options] {font} 'Text to Render'\n"
" hershey-font-gnuplot [options] {font} - generate sample sheet\n"
" {font} a Hershey fontname or fontfile.jhf\n"
" [options]\n"
" -T 'gnuplot_terminal_type [opts]'\n"
" e.g.: -T 'pdf'\n"
" -T 'png crop transparent'\n"
" -h font_height (default 100)\n"
"examples:\n"
" hershey-font-gnuplot futural 'Hello World!' | gnuplot -p\n"
" hershey-font-gnuplot gothiceng 'Calligraphy' | gnuplot -p\n"
" hershey-font-gnuplot -T 'png crop' scriptc 'Nice Text' | gnuplot > out.png\n"
);
}
int
main( int argc, char **argv )
{
char *gnuplot_term_opts = "wxt";
int gnuplot_height = 100;
int opt;
while ((opt = getopt(argc, argv, "h:T:")) != -1) {
switch (opt) {
case 'h':
gnuplot_height = strtoul(optarg, 0, 0);
break;
case 'T':
gnuplot_term_opts = optarg;
break;
default: /* '?' */
usage();
return 1;
}
}
opt = argc - optind;
if ( opt < 1 || opt > 2 ) {
usage();
return 1;
}
if ( opt == 2 )
sample_sheet_mode = 0;
// load a hershey_font structure either by filename or fontname
const char *fontname = argv[optind++];
struct hershey_font *hf;
if ( strchr(fontname,'.') )
hf = hershey_jhf_font_load(fontname);
else
hf = hershey_font_load(fontname);
if ( !hf ) {
perror(fontname);
return 1;
}
// render the text
printf("#\n# gnuplot input file generated by hershey-font-gnuplot\n#\n\n");
printf("\n");
int terminal_width, terminal_height;
char render_text_buf[256];
if ( sample_sheet_mode ) {
int i;
for ( i=0; i<256-32; i++ )
render_text_buf[i] = i+32;
render_text = render_text_buf;
terminal_width = 16 * gnuplot_height;
terminal_height = 8 * gnuplot_height;
} else {
render_text = argv[optind++];
terminal_width = 16 * gnuplot_height;
terminal_height = gnuplot_height;
}
printf("set terminal %s size %d,%d\n",
gnuplot_term_opts, terminal_width, terminal_height);
printf("\n");
printf("unset xtics\n");
printf("unset ytics\n");
printf("unset border\n");
printf("unset key\n");
if ( sample_sheet_mode ) {
printf("set title \"%s\"\n", fontname );
printf("set size ratio 0.5\n");
printf("set xrange [0:%d]\n", 32*32);
printf("set yrange [0:%d]\n", 8*64);
} else {
printf("set size ratio 0.125\n");
printf("set xrange [0:%d]\n", 16*16);
printf("set yrange [0:%d]\n", 2*16);
}
printf("set style arrow 1 nohead\n" );
printf("set style line 1 lc rgb \"black\" lw 0.5\n" );
int x_render_pos = 0;
int y_render_pos = 8;
const char *p;
for ( p=render_text; *p; p++ ) {
// get the character c to be rendered
int c = *((unsigned char *)p);
// get the hershey_glyph for ASCII character c
struct hershey_glyph *hg = hershey_font_glyph(hf, c);
// check whether there actually is a glyph for this character
if ( hg->width == 0 )
continue;
// handle special placement for sample_sheet_mode
if ( sample_sheet_mode ) {
x_render_pos = (c % 32) * 32;
y_render_pos = (c / 32) * 64;
y_render_pos = 8*64 - y_render_pos;
}
printf("# [[ %c ]] glyph(%d) width=%u npaths=%u\n",
c, c, hg->width, hg->npaths);
// walk the paths-list for this glyph
struct hershey_path *hp;
short px, py;
for ( hp=hg->paths; hp; hp=hp->next ) {
// begin draw path
printf("#\t\tpath: nverts=%d\n", hp->nverts);
int i;
for ( i=0; i<hp->nverts; i++ ) {
short x = hp->verts[i].x + x_render_pos;
short y = hp->verts[i].y + y_render_pos;
if ( i > 0 )
printf("set arrow from %d,%d to %d,%d as 1 ls 1\n",
px, py, x, y);
px = x;
py = y;
}
// end draw path
}
// advance the x_render_pos by the width of this glyph
x_render_pos += hg->width;
}
printf("plot NaN notitle\n");
// destroy the hershey_font
hershey_font_free(hf);
return 0;
}
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