Initial revision

1 files changed, 779 insertions, 0 deletions

diff --git a/src/utils/hpftodit/hpftodit.cc b/src/utils/hpftodit/hpftodit.cc
new file mode 100644
index 00000000..af0738c4
--- /dev/null
+++ b/src/utils/hpftodit/hpftodit.cc
@@ -0,0 +1,779 @@
+// -*- 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;
+}