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/*
* libzvbi
*
* Copyright (C) 2004 Michael H. Schimek
*
* 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.
*/
/* $Id: fontgen.c,v 1.5 2005/01/27 04:15:03 mschimek Exp $ */
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <ctype.h>
#include "misc.h"
#include "hamm.c" /* _vbi3_bit_reverse[] */
static char * font_name;
static unsigned int char_height;
uint8_t * image;
static unsigned int image_width;
static unsigned int image_height;
static int
pbm_getc (FILE * fp)
{
int c;
c = getc (fp);
if ('#' == c) {
do c = getc (fp);
while ('\n' != c && '\r' != c && EOF != c);
}
return c;
}
static void
pbm_getint (FILE * fp,
unsigned int * val)
{
int c;
unsigned int t;
do c = pbm_getc (fp);
while (EOF != c && isspace (c));
t = 0;
while (isdigit (c)) {
t = t * 10 + c - '0';
c = pbm_getc (fp);
}
*val = t;
if (EOF == c) {
perror ("read error");
exit (EXIT_FAILURE);
}
}
static void
pbm_read (void)
{
FILE *fp;
size_t n;
size_t image_size;
uint8_t buf[2];
fp = stdin;
n = fread (buf, sizeof (*buf), N_ELEMENTS (buf), fp);
if (2 != n || 'P' != buf[0] || '4' != buf[1]) {
fprintf (stderr, "source is not a .pbm file\n");
exit (EXIT_FAILURE);
}
pbm_getint (fp, &image_width);
pbm_getint (fp, &image_height);
image_size = image_width * image_height / 8;
image = vbi3_malloc (image_size);
if (NULL == image) {
fprintf (stderr, "out of memory\n");
exit (EXIT_FAILURE);
}
n = fread (image, 1, image_size, fp);
if (n < image_size) {
perror ("read error or unexpected eof");
exit (EXIT_FAILURE);
}
}
static void
xbm_write (void)
{
FILE *fp;
unsigned int row;
unsigned int line;
fp = stdout;
fprintf (fp, "/* Generated file, do not edit */\n"
"#define %s_width %u\n"
"#define %s_height %u\n"
"static const uint8_t %s_bits [] = {\n ",
font_name, image_width * image_height / char_height,
font_name, char_height,
font_name);
assert (0 == (image_width % 8));
/* Note this de-interleaves the font image
(puts all chars in row 0) */
for (line = 0; line < char_height; ++line) {
for (row = 0; row < image_height; row += char_height) {
unsigned int x;
uint8_t *p;
p = (image
+ row * image_width / 8
+ line * image_width / 8);
for (x = 0; x < image_width / 8; ++x) {
fprintf (fp, "0x%02x,",
_vbi3_bit_reverse[p[x]]);
if (7 == (x % 8))
fputs ("\n ", fp);
else
fputc (' ', fp);
}
}
}
fputs ("};\n", fp);
}
int
main (int argc,
char ** argv)
{
if (4 != argc) {
fprintf (stderr, "Usage: %s format font_name char_height "
"<pbm-file >output\n",
argv[0]);
exit (EXIT_FAILURE);
}
font_name = argv[2];
char_height = atoi (argv[3]);
pbm_read ();
assert (0 == (image_height % char_height));
if (0 == strcmp (argv[1], "xbm")) {
/* XBM image for built-in render functions (exp-gfx.c). */
xbm_write ();
} else if (0 == strcmp (argv[1], "bdf")) {
/* BDF file for X11 rendering. */
/* TODO (s/a contrib) */
} else if (0 == strcmp (argv[1], "ttf")) {
/* TTF file for TT rendering of
G1 Block Mosaics Set and
G3 Smooth Mosaics and Line Drawing Set. */
/* TODO */
}
exit (EXIT_SUCCESS);
return 0;
}
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