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freebsd/contrib/groff/hpftodit/hpftodit.cc
Paul Traina 4e5867aa82 Virgin import of FSF groff v1.10
1996-09-07 16:18:32 +00:00

780 lines
18 KiB
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// -*- C++ -*-
/* Copyright (C) 1994 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff 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, or (at your option) any later
version.
groff 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 groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
TODO
put human readable font name in device file
devise new names for useful characters
use --- for unnamed characters
option to specify symbol sets to look in
make it work with TrueType fonts
put filename in error messages (or fix lib)
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <errno.h>
#include "assert.h"
#include "lib.h"
#include "posix.h"
#include "errarg.h"
#include "error.h"
#include "cset.h"
#define SIZEOF(v) (sizeof(v)/sizeof(v[0]))
const int MULTIPLIER = 3;
inline
int scale(int n)
{
return n * MULTIPLIER;
}
// tags in TFM file
enum tag_type {
min_tag = 400,
type_tag = 400,
symbol_set_tag = 404,
msl_tag = 403,
inches_per_point_tag = 406,
design_units_per_em_tag = 408,
posture_tag = 409,
stroke_weight_tag = 411,
spacing_tag = 412,
slant_tag = 413,
appearance_width_tag = 414,
word_spacing_tag = 421,
x_height_tag = 424,
lower_ascent_tag = 427,
lower_descent_tag = 428,
width_tag = 433,
left_extent_tag = 435,
right_extent_tag = 436,
ascent_tag = 437,
descent_tag = 438,
pair_kern_tag = 439,
typeface_tag = 442,
max_tag = 443
};
// types in TFM file
enum {
ENUM_TYPE = 1,
BYTE_TYPE = 2,
USHORT_TYPE = 3,
FLOAT_TYPE = 5,
SIGNED_SHORT_TYPE = 17
};
typedef unsigned char byte;
typedef unsigned short uint16;
typedef short int16;
typedef unsigned int uint32;
class File {
public:
File(const char *);
void skip(int n);
byte get_byte();
uint16 get_uint16();
uint32 get_uint32();
void seek(uint32 n);
private:
unsigned char *buf_;
const unsigned char *ptr_;
const unsigned char *end_;
};
struct entry {
char present;
uint16 type;
uint32 count;
uint32 value;
entry() : present(0) { }
};
struct char_info {
uint16 msl;
uint16 width;
uint16 ascent;
int16 descent;
int16 left_extent;
uint16 right_extent;
uint16 symbol_set;
unsigned char code;
};
const uint16 NO_SYMBOL_SET = 0;
struct name_list {
char *name;
name_list *next;
name_list(const char *s, name_list *p) : name(strsave(s)), next(p) { }
~name_list() { a_delete name; }
};
struct symbol_set {
uint16 select;
uint16 index[256];
};
#define SYMBOL_SET(n, c) ((n) * 32 + ((c) - 64))
uint16 text_symbol_sets[] = {
SYMBOL_SET(0, 'N'), // Latin 1
SYMBOL_SET(6, 'J'), // Microsoft Publishing
SYMBOL_SET(2, 'N'), // Latin 2
0
};
uint16 special_symbol_sets[] = {
SYMBOL_SET(8, 'M'),
SYMBOL_SET(5, 'M'),
SYMBOL_SET(15, 'U'),
0
};
entry tags[max_tag + 1 - min_tag];
char_info *char_table;
uint32 nchars;
int msl_name_table_size = 0;
name_list **msl_name_table = 0;
int n_symbol_sets;
symbol_set *symbol_set_table;
static int special_flag = 0;
static int italic_flag = 0;
static int italic_sep;
static void usage();
static const char *xbasename(const char *);
static void read_tags(File &);
static void check_type();
static void check_units(File &);
static int read_map(const char *);
static void require_tag(tag_type);
static void dump_tags(File &f);
static void output_spacewidth();
static void output_pclweight();
static void output_pclproportional();
static void read_and_output_pcltypeface(File &);
static void output_pclstyle();
static void output_slant();
static void output_ligatures();
static void read_symbol_sets(File &);
static void read_and_output_kernpairs(File &);
static void output_charset();
static void read_char_table(File &f);
inline
entry &tag_info(tag_type t)
{
return tags[t - min_tag];
}
int main(int argc, char **argv)
{
program_name = argv[0];
int opt;
int debug_flag = 0;
while ((opt = getopt(argc, argv, "dsvi:")) != EOF) {
switch (opt) {
case 'd':
debug_flag = 1;
break;
case 's':
special_flag = 1;
break;
case 'i':
italic_flag = 1;
italic_sep = atoi(optarg);
break;
case 'v':
{
extern const char *version_string;
fprintf(stderr, "hpftodit version %s\n", version_string);
fflush(stderr);
break;
}
break;
case '?':
usage();
default:
assert(0);
}
}
if (argc - optind != 3)
usage();
File f(argv[optind]);
if (!read_map(argv[optind + 1]))
exit(1);
current_filename = 0;
current_lineno = -1; // no line numbers
if (freopen(argv[optind + 2], "w", stdout) == 0)
fatal("cannot open `%1': %2", argv[optind + 2], strerror(errno));
current_filename = argv[optind];
printf("name %s\n", xbasename(argv[optind + 2]));
if (special_flag)
printf("special\n");
read_tags(f);
check_type();
check_units(f);
if (debug_flag)
dump_tags(f);
read_char_table(f);
output_spacewidth();
output_slant();
read_and_output_pcltypeface(f);
output_pclproportional();
output_pclweight();
output_pclstyle();
read_symbol_sets(f);
output_ligatures();
read_and_output_kernpairs(f);
output_charset();
return 0;
}
static
void usage()
{
fprintf(stderr, "usage: %s [-s] [-i n] tfm_file map_file output_font\n",
program_name);
exit(1);
}
File::File(const char *s)
{
int fd = open(s, O_RDONLY);
if (fd < 0)
fatal("cannot open `%1': %2", s, strerror(errno));
current_filename = s;
struct stat sb;
if (fstat(fd, &sb) < 0)
fatal("cannot stat: %1", strerror(errno));
if (!S_ISREG(sb.st_mode))
fatal("not a regular file");
buf_ = new unsigned char[sb.st_size];
long nread = read(fd, buf_, sb.st_size);
if (nread < 0)
fatal("read error: %1", strerror(errno));
if (nread != sb.st_size)
fatal("read unexpected number of bytes");
ptr_ = buf_;
end_ = buf_ + sb.st_size;
}
void File::skip(int n)
{
if (end_ - ptr_ < n)
fatal("unexpected end of file");
ptr_ += n;
}
void File::seek(uint32 n)
{
if (end_ - buf_ < n)
fatal("unexpected end of file");
ptr_ = buf_ + n;
}
byte File::get_byte()
{
if (ptr_ >= end_)
fatal("unexpected end of file");
return *ptr_++;
}
uint16 File::get_uint16()
{
if (end_ - ptr_ < 2)
fatal("unexpected end of file");
uint16 n = *ptr_++;
return n + (*ptr_++ << 8);
}
uint32 File::get_uint32()
{
if (end_ - ptr_ < 4)
fatal("unexpected end of file");
uint32 n = *ptr_++;
for (int i = 0; i < 3; i++)
n += *ptr_++ << (i + 1)*8;
return n;
}
static
void read_tags(File &f)
{
if (f.get_byte() != 'I' || f.get_byte() != 'I')
fatal("not an Intel format TFM file");
f.skip(6);
uint16 ntags = f.get_uint16();
entry dummy;
for (uint16 i = 0; i < ntags; i++) {
uint16 tag = f.get_uint16();
entry *p;
if (min_tag <= tag && tag <= max_tag)
p = tags + (tag - min_tag);
else
p = &dummy;
p->present = 1;
p->type = f.get_uint16();
p->count = f.get_uint32();
p->value = f.get_uint32();
}
}
static
void check_type()
{
require_tag(type_tag);
if (tag_info(type_tag).value != 0) {
if (tag_info(type_tag).value == 2)
fatal("cannot handle TrueType tfm files");
fatal("unknown type tag %1", int(tag_info(type_tag).value));
}
}
static
void check_units(File &f)
{
require_tag(design_units_per_em_tag);
f.seek(tag_info(design_units_per_em_tag).value);
uint32 num = f.get_uint32();
uint32 den = f.get_uint32();
if (num != 8782 || den != 1)
fatal("design units per em != 8782/1");
require_tag(inches_per_point_tag);
f.seek(tag_info(inches_per_point_tag).value);
num = f.get_uint32();
den = f.get_uint32();
if (num != 100 || den != 7231)
fatal("inches per point not 100/7231");
}
static
void require_tag(tag_type t)
{
if (!tag_info(t).present)
fatal("tag %1 missing", int(t));
}
static
void output_spacewidth()
{
require_tag(word_spacing_tag);
printf("spacewidth %d\n", scale(tag_info(word_spacing_tag).value));
}
static
void read_symbol_sets(File &f)
{
uint32 symbol_set_dir_length = tag_info(symbol_set_tag).count;
n_symbol_sets = symbol_set_dir_length/14;
symbol_set_table = new symbol_set[n_symbol_sets];
int i;
for (i = 0; i < n_symbol_sets; i++) {
f.seek(tag_info(symbol_set_tag).value + i*14);
(void)f.get_uint32();
uint32 off1 = f.get_uint32();
uint32 off2 = f.get_uint32();
(void)f.get_uint16(); // what's this for?
f.seek(off1);
int j;
uint16 kind = 0;
for (j = 0; j < off2 - off1; j++) {
unsigned char c = f.get_byte();
if ('0' <= c && c <= '9')
kind = kind*10 + (c - '0');
else if ('A' <= c && c <= 'Z')
kind = kind*32 + (c - 64);
}
symbol_set_table[i].select = kind;
for (j = 0; j < 256; j++)
symbol_set_table[i].index[j] = f.get_uint16();
}
for (i = 0; i < nchars; i++)
char_table[i].symbol_set = NO_SYMBOL_SET;
uint16 *symbol_set_selectors = (special_flag
? special_symbol_sets
: text_symbol_sets);
for (i = 0; symbol_set_selectors[i] != 0; i++) {
int j;
for (j = 0; j < n_symbol_sets; j++)
if (symbol_set_table[j].select == symbol_set_selectors[i])
break;
if (j < n_symbol_sets) {
for (int k = 0; k < 256; k++) {
uint16 index = symbol_set_table[j].index[k];
if (index != 0xffff
&& char_table[index].symbol_set == NO_SYMBOL_SET) {
char_table[index].symbol_set = symbol_set_table[j].select;
char_table[index].code = k;
}
}
}
}
}
static
void read_char_table(File &f)
{
require_tag(msl_tag);
nchars = tag_info(msl_tag).count;
char_table = new char_info[nchars];
f.seek(tag_info(msl_tag).value);
uint32 i;
for (i = 0; i < nchars; i++)
char_table[i].msl = f.get_uint16();
require_tag(width_tag);
f.seek(tag_info(width_tag).value);
for (i = 0; i < nchars; i++)
char_table[i].width = f.get_uint16();
require_tag(ascent_tag);
f.seek(tag_info(ascent_tag).value);
for (i = 0; i < nchars; i++) {
char_table[i].ascent = f.get_uint16();
}
require_tag(descent_tag);
f.seek(tag_info(descent_tag).value);
for (i = 0; i < nchars; i++) {
char_table[i].descent = f.get_uint16();
if (char_table[i].descent > 0)
char_table[i].descent = 0;
}
require_tag(left_extent_tag);
f.seek(tag_info(left_extent_tag).value);
for (i = 0; i < nchars; i++)
char_table[i].left_extent = int16(f.get_uint16());
require_tag(right_extent_tag);
f.seek(tag_info(right_extent_tag).value);
for (i = 0; i < nchars; i++)
char_table[i].right_extent = f.get_uint16();
}
static
void output_pclweight()
{
require_tag(stroke_weight_tag);
int stroke_weight = tag_info(stroke_weight_tag).value;
int pcl_stroke_weight;
if (stroke_weight < 128)
pcl_stroke_weight = -3;
else if (stroke_weight == 128)
pcl_stroke_weight = 0;
else if (stroke_weight <= 145)
pcl_stroke_weight = 1;
else if (stroke_weight <= 179)
pcl_stroke_weight = 3;
else
pcl_stroke_weight = 4;
printf("pclweight %d\n", pcl_stroke_weight);
}
static
void output_pclproportional()
{
require_tag(spacing_tag);
printf("pclproportional %d\n", tag_info(spacing_tag).value == 0);
}
static
void read_and_output_pcltypeface(File &f)
{
printf("pcltypeface ");
require_tag(typeface_tag);
f.seek(tag_info(typeface_tag).value);
for (uint32 i = 0; i < tag_info(typeface_tag).count; i++) {
unsigned char c = f.get_byte();
if (c == '\0')
break;
putchar(c);
}
printf("\n");
}
static
void output_pclstyle()
{
unsigned pcl_style = 0;
// older tfms don't have the posture tag
if (tag_info(posture_tag).present) {
if (tag_info(posture_tag).value)
pcl_style |= 1;
}
else {
require_tag(slant_tag);
if (tag_info(slant_tag).value != 0)
pcl_style |= 1;
}
require_tag(appearance_width_tag);
if (tag_info(appearance_width_tag).value < 100) // guess
pcl_style |= 4;
printf("pclstyle %d\n", pcl_style);
}
static
void output_slant()
{
require_tag(slant_tag);
int slant = int16(tag_info(slant_tag).value);
if (slant != 0)
printf("slant %f\n", slant/100.0);
}
static
void output_ligatures()
{
// don't use ligatures for fixed space font
require_tag(spacing_tag);
if (tag_info(spacing_tag).value != 0)
return;
static const char *ligature_names[] = {
"fi", "fl", "ff", "ffi", "ffl"
};
static const char *ligature_chars[] = {
"fi", "fl", "ff", "Fi", "Fl"
};
unsigned ligature_mask = 0;
int i;
for (i = 0; i < nchars; i++) {
uint16 msl = char_table[i].msl;
if (msl < msl_name_table_size
&& char_table[i].symbol_set != NO_SYMBOL_SET) {
for (name_list *p = msl_name_table[msl]; p; p = p->next)
for (int j = 0; j < SIZEOF(ligature_chars); j++)
if (strcmp(p->name, ligature_chars[j]) == 0) {
ligature_mask |= 1 << j;
break;
}
}
}
if (ligature_mask) {
printf("ligatures");
for (i = 0; i < SIZEOF(ligature_names); i++)
if (ligature_mask & (1 << i))
printf(" %s", ligature_names[i]);
printf(" 0\n");
}
}
static
void read_and_output_kernpairs(File &f)
{
if (tag_info(pair_kern_tag).present) {
printf("kernpairs\n");
f.seek(tag_info(pair_kern_tag).value);
uint16 n_pairs = f.get_uint16();
for (int i = 0; i < n_pairs; i++) {
uint16 i1 = f.get_uint16();
uint16 i2 = f.get_uint16();
int16 val = int16(f.get_uint16());
if (char_table[i1].symbol_set != NO_SYMBOL_SET
&& char_table[i2].symbol_set != NO_SYMBOL_SET
&& char_table[i1].msl < msl_name_table_size
&& char_table[i2].msl < msl_name_table_size) {
for (name_list *p = msl_name_table[char_table[i1].msl];
p;
p = p->next)
for (name_list *q = msl_name_table[char_table[i2].msl];
q;
q = q->next)
printf("%s %s %d\n", p->name, q->name, scale(val));
}
}
}
}
static
void output_charset()
{
require_tag(slant_tag);
double slant_angle = int16(tag_info(slant_tag).value)*PI/18000.0;
double slant = sin(slant_angle)/cos(slant_angle);
require_tag(x_height_tag);
require_tag(lower_ascent_tag);
require_tag(lower_descent_tag);
printf("charset\n");
int i;
for (i = 0; i < nchars; i++) {
uint16 msl = char_table[i].msl;
if (msl < msl_name_table_size
&& msl_name_table[msl]) {
if (char_table[i].symbol_set != NO_SYMBOL_SET) {
printf("%s\t%d,%d",
msl_name_table[msl]->name,
scale(char_table[i].width),
scale(char_table[i].ascent));
int depth = scale(- char_table[i].descent);
if (depth < 0)
depth = 0;
int italic_correction = 0;
int left_italic_correction = 0;
int subscript_correction = 0;
if (italic_flag) {
italic_correction = scale(char_table[i].right_extent
- char_table[i].width
+ italic_sep);
if (italic_correction < 0)
italic_correction = 0;
subscript_correction = int((tag_info(x_height_tag).value
* slant * .8) + .5);
if (subscript_correction > italic_correction)
subscript_correction = italic_correction;
left_italic_correction = scale(italic_sep
- char_table[i].left_extent);
}
if (subscript_correction != 0)
printf(",%d,%d,%d,%d",
depth, italic_correction, left_italic_correction,
subscript_correction);
else if (left_italic_correction != 0)
printf(",%d,%d,%d", depth, italic_correction, left_italic_correction);
else if (italic_correction != 0)
printf(",%d,%d", depth, italic_correction);
else if (depth != 0)
printf(",%d", depth);
// This is fairly arbitrary. Fortunately it doesn't much matter.
unsigned type = 0;
if (char_table[i].ascent > (tag_info(lower_ascent_tag).value*9)/10)
type |= 2;
if (char_table[i].descent < (int16(tag_info(lower_descent_tag).value)*9)/10)
type |= 1;
printf("\t%d\t%d\n",
type,
char_table[i].symbol_set*256 + char_table[i].code);
for (name_list *p = msl_name_table[msl]->next; p; p = p->next)
printf("%s\t\"\n", p->name);
}
else
warning("MSL %1 not in any of the searched symbol sets", msl);
}
}
}
static
void dump_tags(File &f)
{
int i;
for (i = min_tag; i <= max_tag; i++) {
enum tag_type t = tag_type(i);
if (tag_info(t).present) {
fprintf(stderr,
"%d %d %d %d\n", i, tag_info(t).type, tag_info(t).count,
tag_info(t).value);
if (tag_info(t).type == FLOAT_TYPE
&& tag_info(t).count == 1) {
f.seek(tag_info(t).value);
uint32 num = f.get_uint32();
uint32 den = f.get_uint32();
fprintf(stderr, "(%u/%u = %g)\n", num, den, (double)num/den);
}
}
}
}
static
int read_map(const char *file)
{
errno = 0;
FILE *fp = fopen(file, "r");
if (!fp) {
error("can't open `%1': %2", file, strerror(errno));
return 0;
}
current_filename = file;
char buf[512];
current_lineno = 0;
while (fgets(buf, int(sizeof(buf)), fp)) {
current_lineno++;
char *ptr = buf;
while (csspace(*ptr))
ptr++;
if (*ptr == '\0' || *ptr == '#')
continue;
ptr = strtok(ptr, " \n\t");
if (!ptr)
continue;
int n;
if (sscanf(ptr, "%d", &n) != 1) {
error("bad map file");
fclose(fp);
return 0;
}
if (n < 0) {
error("negative code");
fclose(fp);
return 0;
}
if (n >= msl_name_table_size) {
size_t old_size = msl_name_table_size;
name_list **old_table = msl_name_table;
msl_name_table_size = n + 256;
msl_name_table = new name_list *[msl_name_table_size];
if (old_table) {
memcpy(msl_name_table, old_table, old_size*sizeof(name_list *));
a_delete old_table;
}
for (size_t i = old_size; i < msl_name_table_size; i++)
msl_name_table[i] = 0;
}
ptr = strtok(0, " \n\t");
if (!ptr) {
error("missing names");
fclose(fp);
return 0;
}
for (; ptr; ptr = strtok(0, " \n\t"))
msl_name_table[n] = new name_list(ptr, msl_name_table[n]);
}
fclose(fp);
return 1;
}
static
const char *xbasename(const char *s)
{
const char *b = strrchr(s, '/');
return b ? b + 1 : s;
}
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