Download raw (16.3 KB)
/* -*-c-indentation-style:"bsd"-*- */
/*========================================================================*\
Copyright (c) 1990-1999 Paul Vojta
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
PAUL VOJTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\*========================================================================*/
/*
* GF font reading routines.
* Public routines are read_GF_index and read_GF_char.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h> /* getopt. */
#include <strings.h>
#include "config.h"
#define ARGS(x) x
#define DBG_PK 0
#define WIDENINT (int)
typedef unsigned int wide_ubyte;
typedef int wide_bool;
typedef unsigned long Pixel;
typedef unsigned int Dimension;
#define one(fp) ((unsigned char) getc(fp))
#define sone(fp) ((long) one(fp))
#define two(fp) num (fp, 2)
#define stwo(fp) snum(fp, 2)
#define four(fp) num (fp, 4)
#define sfour(fp) snum(fp, 4)
typedef unsigned char ubyte;
struct font;
typedef void (*read_char_proc) ARGS((struct font *, wide_ubyte));
typedef long (*set_char_proc) ARGS((wide_ubyte));
#define BMTYPE int
#define GF_PRE 247
#define GF_ID 131
#define GF_MAGIC (GF_PRE << 8) + GF_ID
#define BMUNIT unsigned BMTYPE
/*
(can't use sizeof.
*/
#define BMBYTES 4
#define BMBITS (8 * BMBYTES)
extern BMUNIT bit_masks[BMBITS + 1];
#define ADD(a, b) ((BMUNIT *) (((char *) a) + b))
#define SUB(a, b) ((BMUNIT *) (((char *) a) - b))
#if (BMBYTES == 1)
BMUNIT bit_masks[9] = {
0x0, 0x1, 0x3, 0x7,
0xf, 0x1f, 0x3f, 0x7f,
0xff
};
#else
#if (BMBYTES == 2)
BMUNIT bit_masks[17] = {
0x0, 0x1, 0x3, 0x7,
0xf, 0x1f, 0x3f, 0x7f,
0xff, 0x1ff, 0x3ff, 0x7ff,
0xfff, 0x1fff, 0x3fff, 0x7fff,
0xffff
};
#else /* BMBYTES == 4 */
BMUNIT bit_masks[33] = {
0x0, 0x1, 0x3, 0x7,
0xf, 0x1f, 0x3f, 0x7f,
0xff, 0x1ff, 0x3ff, 0x7ff,
0xfff, 0x1fff, 0x3fff, 0x7fff,
0xffff, 0x1ffff, 0x3ffff, 0x7ffff,
0xfffff, 0x1fffff, 0x3fffff, 0x7fffff,
0xffffff, 0x1ffffff, 0x3ffffff, 0x7ffffff,
0xfffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
0xffffffff
};
#endif
#endif
typedef enum {false,true}bool;
bool debug;
struct font {
char *fontname; /* name of font */
float fsize; /* size information (dots per inch) */
int magstepval; /* magstep number * two, or NOMAGSTP */
FILE *file; /* open font file or NULL */
char *filename; /* name of font file */
long checksum; /* checksum */
unsigned short timestamp; /* for LRU management of fonts */
ubyte flags; /* flags byte (see values below) */
ubyte maxchar; /* largest character code */
double dimconv; /* size conversion factor */
/* these fields are used by (loaded) raster fonts */
read_char_proc read_char; /* function to read bitmap */
struct glyph *glyph;
/* these fields are used by (loaded) virtual fonts */
struct font **vf_table; /* list of fonts used by this vf */
struct tn *vf_chain; /* ditto, if TeXnumber >= VFTABLELEN */
struct font *first_font; /* first font defined */
struct macro *macro;
/* I suppose the above could be put into a union, but we */
/* wouldn't save all that much space. */
};
/*
* Bitmap structure for raster ops.
*/
struct bitmap {
unsigned short w, h; /* width and height in pixels */
short bytes_wide; /* scan-line width in bytes */
char *bits; /* pointer to the bits */
};
/*
* Per-character information.
* There is one of these for each character in a font (raster fonts only).
* All fields are filled in at font definition time,
* except for the bitmap, which is "faulted in"
* when the character is first referenced.
*/
struct glyph {
long addr; /* address of bitmap in font file */
long dvi_adv; /* DVI units to move reference point */
short x, y; /* x and y offset in pixels */
struct bitmap bitmap; /* bitmap for character */
short x2, y2; /* x and y offset in pixels (shrunken bitmap) */
#ifdef GREY
XImage *image2;
char *pixmap2;
char *pixmap2_t;
#endif
struct bitmap bitmap2; /* shrunken bitmap for character */
};
#define PAINT_0 0
#define PAINT1 64
#define PAINT2 65
#define PAINT3 66
#define BOC 67
#define BOC1 68
#define EOC 69
#define SKIP0 70
#define SKIP1 71
#define SKIP2 72
#define SKIP3 73
#define NEW_ROW_0 74
#define NEW_ROW_MAX 238
#define XXX1 239
#define XXX2 240
#define XXX3 241
#define XXX4 242
#define YYY 243
#define NO_OP 244
#define CHAR_LOC 245
#define CHAR_LOC0 246
#define PRE 247
#define POST 248
#define POST_POST 249
#define GF_ID_BYTE 131
#define TRAILER 223 /* Trailing bytes at end of file */
static FILE *GF_file;
static void
expect( ubyte ch)
{
ubyte ch1 = one(GF_file);
if (ch1 != ch)
{
fprintf(stderr, "Bad GF file: %d expected, %d received.", ch, ch1);
exit (2);
}
}
static void
too_many_bits( ubyte ch)
{
fprintf(stderr,"Too many bits found when loading character %d", ch);
exit (2);
}
/*
*
* Read size bytes from the FILE fp, constructing them into a
* signed/unsigned integer.
*
*/
unsigned long
num( FILE *fp, int size)
{
long x = 0;
while (size--) x = (x << 8) | one(fp);
return x;
}
long
snum( FILE *fp, int size)
{
long x;
x = (signed char) getc(fp);
while (--size) x = (x << 8) | one(fp);
return x;
}
ubyte maxchar;
void
realloc_font(struct font *fontp, wide_ubyte newsize)
{
struct glyph *glyphp;
glyphp = fontp->glyph = (struct glyph*)realloc(fontp->glyph,
(unsigned int) (newsize + 1) * sizeof(struct glyph));
if (newsize > fontp->maxchar)
bzero((char *) (glyphp + fontp->maxchar + 1),
(int) (newsize - fontp->maxchar) * sizeof(struct glyph));
maxchar = fontp->maxchar = newsize;
}
#define ROUNDUP(x,y) (((x)+(y)-1)/(y))
void *
xmalloc( unsigned size)
{
void *mem = malloc(size);
if (mem == NULL)
{
fprintf(stderr,"! Out of memory (allocating %u bytes).\n", size);
exit (2);
}
return mem;
}
void
alloc_bitmap( struct bitmap *bitmap)
{
unsigned int size;
/* width must be multiple of 16 bits for raster_op */
bitmap->bytes_wide = ROUNDUP((int) bitmap->w, BMBITS) * BMBYTES;
size = bitmap->bytes_wide * bitmap->h;
bitmap->bits = (char*)xmalloc(size != 0 ? size : 1);
}
/*
* Public routines
*/
#ifndef WORDS_BIGENDIAN
#define word_swap(x) x
#else
#define word_swap(x) \
((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
#endif
static void
read_GF_char(struct font *fontp, wide_ubyte ch)
{
struct glyph *g;
ubyte cmnd;
int min_m, max_m, min_n, max_n;
BMUNIT *cp, *basep, *maxp;
BMUNIT **basep_cpp = &basep;
int bytes_wide;
bool paint_switch;
#define White false
#define Black true
bool new_row;
int count;
int word_weight;
g = &fontp->glyph[ch];
GF_file = fontp->file;
if(debug & DBG_PK)
printf("Loading gf char %d", ch);
for (;;) {
switch (cmnd = one(GF_file)) {
case XXX1:
case XXX2:
case XXX3:
case XXX4:
fseek(GF_file, (long) num(GF_file,
WIDENINT cmnd - XXX1 + 1), 1);
continue;
case YYY:
(void) four(GF_file);
continue;
case BOC:
(void) four(GF_file); /* skip character code */
(void) four(GF_file); /* skip pointer to prev char */
min_m = sfour(GF_file);
max_m = sfour(GF_file);
g->x = -min_m;
min_n = sfour(GF_file);
g->y = max_n = sfour(GF_file);
g->bitmap.w = max_m - min_m + 1;
g->bitmap.h = max_n - min_n + 1;
break;
case BOC1:
(void) one(GF_file); /* skip character code */
g->bitmap.w = one(GF_file); /* max_m - min_m */
g->x = g->bitmap.w - one(GF_file); /* ditto - max_m */
++g->bitmap.w;
g->bitmap.h = one(GF_file) + 1;
g->y = one(GF_file);
break;
default:
fprintf(stderr,"Bad BOC code: %d", cmnd);
}
break;
}
paint_switch = White;
if (debug)
printf(", size=%dlx%d, dvi_adv=%ld\n", g->bitmap.w, g->bitmap.h,
g->dvi_adv);
alloc_bitmap(&g->bitmap);
cp = basep = (BMUNIT *) g->bitmap.bits;
/*
* Read character data into *basep
*/
bytes_wide = ROUNDUP((int) g->bitmap.w, BMBITS) * BMBYTES;
maxp = ADD(basep, g->bitmap.h * bytes_wide);
bzero(g->bitmap.bits, g->bitmap.h * bytes_wide);
new_row = false;
word_weight = BMBITS;
for (;;) {
count = -1;
cmnd = one(GF_file);
if (cmnd < 64) count = cmnd;
else if (cmnd >= NEW_ROW_0 && cmnd <= NEW_ROW_MAX) {
count = cmnd - NEW_ROW_0;
paint_switch = White; /* it'll be complemented later */
new_row = true;
}
else switch (cmnd) {
case PAINT1:
case PAINT2:
case PAINT3:
count = num(GF_file, WIDENINT cmnd - PAINT1 + 1);
break;
case EOC:
if (cp >= ADD(basep, bytes_wide)) too_many_bits(ch);
return;
case SKIP1:
case SKIP2:
case SKIP3:
*(basep_cpp) +=
num(GF_file, WIDENINT cmnd - SKIP0) * bytes_wide / sizeof (BMUNIT);
case SKIP0:
new_row = true;
paint_switch = White;
break;
case XXX1:
case XXX2:
case XXX3:
case XXX4:
fseek(GF_file, (long) num(GF_file,
WIDENINT cmnd - XXX1 + 1), 1);
break;
case YYY:
(void) four(GF_file);
break;
case NO_OP:
break;
default:
fprintf(stderr, "Bad command in GF file: %d", cmnd);
} /* end switch */
if (new_row) {
*(basep_cpp) +=
bytes_wide / sizeof (BMUNIT);
if (basep >= maxp || cp >= basep) too_many_bits(ch);
cp = basep;
word_weight = BMBITS;
new_row = false;
}
if (count >= 0) {
while (count)
if (count <= word_weight) {
if (paint_switch) {
*cp = word_swap (*cp);
*cp |= bit_masks[count] << (BMBITS - word_weight);
*cp = word_swap (*cp);
}
word_weight -= count;
break;
}
else {
if (paint_switch) {
*cp = word_swap (*cp);
*cp |= bit_masks[word_weight] <<
(BMBITS - word_weight);
*cp = word_swap (*cp);
}
cp++;
count -= word_weight;
word_weight = BMBITS;
}
paint_switch = ! paint_switch;
}
} /* end for */
}
void
read_GF_index( struct font *fontp, wide_bool hushcs)
{
int hppp, vppp;
ubyte ch, cmnd;
struct glyph *g;
long checksum;
fontp->read_char = read_GF_char;
GF_file = fontp->file;
if (debug)
printf("Reading GF pixel file %s\n", fontp->filename);
/*
* Find postamble.
*/
fseek(GF_file, (long) -4, 2);
while (four(GF_file) != ((unsigned long) TRAILER << 24 | TRAILER << 16
| TRAILER << 8 | TRAILER))
fseek(GF_file, (long) -5, 1);
fseek(GF_file, (long) -5, 1);
for (;;) {
ch = one(GF_file);
if (ch != TRAILER) break;
fseek(GF_file, (long) -2, 1);
}
if (ch != GF_ID_BYTE)
fprintf(stderr, "Bad end of font file %s", fontp->fontname);
fseek(GF_file, (long) -6, 1);
expect(POST_POST);
fseek(GF_file, sfour(GF_file), 0); /* move to postamble */
/*
* Read postamble.
*/
expect(POST);
(void) four(GF_file); /* pointer to last eoc + 1 */
(void) four(GF_file); /* skip design size */
checksum = four(GF_file);
if (checksum != fontp->checksum && checksum != 0 && fontp->checksum != 0
&& !hushcs)
fprintf(stderr,
"Checksum mismatch (dvi = %lu, gf = %lu) in font file %s\n",
fontp->checksum, checksum, fontp->filename);
hppp = sfour(GF_file);
vppp = sfour(GF_file);
if (hppp != vppp && (debug))
printf("Font has non-square aspect ratio %d:%d\n", vppp, hppp);
(void) four(GF_file); /* skip min_m */
(void) four(GF_file); /* skip max_m */
(void) four(GF_file); /* skip min_n */
(void) four(GF_file); /* skip max_n */
/*
* Prepare glyph array.
*/
fontp->glyph = (struct glyph*)xmalloc(256 * sizeof(struct glyph));
bzero((char *) fontp->glyph, 256 * sizeof(struct glyph));
/*
* Read glyph directory.
*/
while ((cmnd = one(GF_file)) != POST_POST) {
int addr;
ch = one(GF_file); /* character code */
g = &fontp->glyph[ch];
switch (cmnd) {
case CHAR_LOC:
/* g->pxl_adv = sfour(GF_file); */
(void) four(GF_file);
(void) four(GF_file); /* skip dy */
break;
case CHAR_LOC0:
/* g->pxl_adv = one(GF_file) << 16; */
(void) one(GF_file);
break;
default:
fprintf(stderr, "Non-char_loc command found in GF preamble: %d",
cmnd);
}
g->dvi_adv = (long int) fontp->dimconv * sfour(GF_file);
addr = four(GF_file);
if (addr != -1) g->addr = addr;
if (debug)
printf("Read GF glyph for character %d; dy = %ld, addr = %d\n",
ch, g->dvi_adv, addr);
}
}
void
help ()
{
printf (
"gf2pbm [options] FONT-NAME\n"
"Options: \n"
" -b dump bitmap\n"
" -d debug\n"
" -n NUM do glyph number NUM\n"
" -o FILE output to FILE\n"
" -h this help\n"
" -s print bitmap size\n"
"\n"
"Return status:\n"
" 0 - success\n"
" 1 - no such glyph\n"
" 2 - error\n"
"Based on Paul Vojta's Xdvi, munged by Han-Wen Nienhuys <hanwen@xs4all.nl>\n"
);
}
void
dump_bitmap (FILE *out, struct bitmap *bm)
{
int bs = (bm->w) / 8 + ((bm->w % 8) ? 1 : 0);
int h =0;
fprintf (out, "P4\n");
fprintf (out, "%d %d\n", bm->w, bm->h);
for (h = 0 ; h < bm->h; h++)
{
int c;
for (c = 0 ; c < bs; c++)
{
ubyte todump = bm->bits[h *bm->bytes_wide + c];
ubyte outb = 0;
int i = 8;
while (i --)
{
outb = (outb << 1) | (todump & 0x1);
todump = todump >> 1;
}
fputc(outb, out);
}
}
}
int
main (int argc, char * argv [])
{
int print_size = 0;
int do_bitmap = 0;
FILE * in_file= 0;
struct font * fontp;
int glyph_num = 65;
char *filename =NULL;
char * outfilename = NULL;
int c;
while ((c = getopt (argc, argv, "bsdho:n:")) != -1)
{
switch (c)
{
case 'b':
do_bitmap = true;
break;
case 'd':
debug = true;
break;
case 'h':
help ();
exit (0);
break;
case 'n':
sscanf (optarg, "%d", &glyph_num);
break;
case 's':
print_size = true;
break;
case 'o':
outfilename = optarg;
break;
}
}
if (!do_bitmap && !print_size)
do_bitmap = true;
filename = argv[optind];
if (!filename)
{
fprintf (stderr, "No font-name found. Use -h for help\n");
exit (2);
}
in_file = fopen (filename, "r");
if (!in_file)
{
fprintf (stderr, "could not open `%s'\n", filename);
exit (2);
}
fontp = (struct font*)malloc (sizeof (struct font));
bzero (fontp, sizeof (struct font));
fontp->fontname = filename;
fontp->file = in_file;
fontp->fsize = 0;
fontp->timestamp = 0;
fontp->maxchar = 255;
maxchar = 255;
{
int magic = two(fontp->file);
if(magic != GF_MAGIC)
{
fprintf (stderr, "Not a GF file\n");
exit (2);
}
}
read_GF_index (fontp, false);
while (maxchar > 0 && fontp->glyph[maxchar].addr == 0) --maxchar;
if (maxchar < 255)
realloc_font(fontp, WIDENINT maxchar);
if (fontp->glyph[glyph_num].addr == 0)
{
fprintf (stderr, "No glyph number %d\n", glyph_num);
return 1;
}
fseek(fontp->file, fontp->glyph[glyph_num].addr, 0);
read_GF_char (fontp, glyph_num);
if (print_size)
{
struct glyph* gp = fontp->glyph + glyph_num;
fprintf (stdout, "size: %dx%d, offset: (%d,%d)\n",
gp->bitmap.w, gp->bitmap.h,
gp->x, gp->y);
}
if (do_bitmap)
{
FILE * out_file = 0;
if (outfilename && !strcmp ("-", outfilename))
out_file = stdout;
out_file = outfilename ? fopen (outfilename, "w") : NULL;
if(!out_file)
{
static char s[100];
sprintf (s, "%d.pbm", glyph_num);
outfilename = s;
out_file = fopen (s, "w");
}
if (!out_file)
{
fprintf (stderr, "Could not open output file `%s'\n", outfilename);
exit (2);
}
dump_bitmap (out_file, &fontp->glyph[glyph_num].bitmap);
fclose (out_file);
}
return 0;
}