kc3-lang/harfbuzz/util/hb-subset.cc

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• Hash : 515863e5
  Author :
  Date : 2022-10-13T23:42:00
  

  [subset] Remove add accelerator flag, replace with new api method.
  
  Adds hb_subset_preprocess() which preprocesses the face and attaches accelerator data.
  

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• util/hb-subset.cc

• /*
   * Copyright © 2010  Behdad Esfahbod
   * Copyright © 2011,2012  Google, Inc.
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Google Author(s): Garret Rieger, Rod Sheeter
   */
  
  #include "batch.hh"
  #include "face-options.hh"
  #include "main-font-text.hh"
  #include "output-options.hh"
  
  #include <hb-subset.h>
  
  static hb_face_t* preprocess_face(hb_face_t* face)
  {
    #ifdef HB_EXPERIMENTAL_API
    return hb_subset_preprocess (face);
    #else
    return hb_face_reference(face);
    #endif
  }
  
  /*
   * Command line interface to the harfbuzz font subsetter.
   */
  
  struct subset_main_t : option_parser_t, face_options_t, output_options_t<false>
  {
    subset_main_t ()
    : input (hb_subset_input_create_or_fail ())
    {}
    ~subset_main_t ()
    {
      hb_subset_input_destroy (input);
    }
  
    void parse_face (int argc, const char * const *argv)
    {
      option_parser_t parser;
      face_options_t face_opts;
  
      face_opts.add_options (&parser);
  
      GOptionEntry entries[] =
      {
        {G_OPTION_REMAINING,	0, G_OPTION_FLAG_IN_MAIN,
  				G_OPTION_ARG_CALLBACK,	(gpointer) &collect_face,	nullptr,	"[FONT-FILE] [TEXT]"},
        {nullptr}
      };
      parser.add_main_group (entries, &face_opts);
      parser.add_options ();
  
      g_option_context_set_ignore_unknown_options (parser.context, true);
      g_option_context_set_help_enabled (parser.context, false);
  
      char **args = (char **)
  #if GLIB_CHECK_VERSION (2, 68, 0)
        g_memdup2
  #else
        g_memdup
  #endif
        (argv, argc * sizeof (*argv));
      parser.parse (&argc, &args);
      g_free (args);
  
      set_face (face_opts.face);
    }
  
    void parse (int argc, char **argv)
    {
      bool help = false;
      for (auto i = 1; i < argc; i++)
        if (!strncmp ("--help", argv[i], 6))
        {
  	help = true;
  	break;
        }
  
      if (likely (!help))
      {
        /* Do a preliminary parse to load font-face, such that we can use it
         * during main option parsing. */
        parse_face (argc, argv);
      }
  
      add_options ();
      option_parser_t::parse (&argc, &argv);
    }
  
    int operator () (int argc, char **argv)
    {
      parse (argc, argv);
  
      hb_face_t* orig_face = face;
      if (preprocess)
        orig_face = preprocess_face (face);
  
      hb_face_t *new_face = nullptr;
      for (unsigned i = 0; i < num_iterations; i++)
      {
        hb_face_destroy (new_face);
        new_face = hb_subset_or_fail (face, input);
      }
  
      bool success = new_face;
      if (success)
      {
        hb_blob_t *result = hb_face_reference_blob (new_face);
        write_file (output_file, result);
        hb_blob_destroy (result);
      }
  
      hb_face_destroy (new_face);
      if (preprocess)
        hb_face_destroy (orig_face);
  
      return success ? 0 : 1;
    }
  
    bool
    write_file (const char *output_file, hb_blob_t *blob)
    {
      assert (out_fp);
  
      unsigned int size;
      const char* data = hb_blob_get_data (blob, &size);
  
      while (size)
      {
        size_t ret = fwrite (data, 1, size, out_fp);
        size -= ret;
        data += ret;
        if (size && ferror (out_fp))
          fail (false, "Failed to write output: %s", strerror (errno));
      }
  
      return true;
    }
  
    void add_options ();
  
    protected:
    static gboolean
    collect_face (const char *name,
  		const char *arg,
  		gpointer    data,
  		GError    **error);
    static gboolean
    collect_rest (const char *name,
  		const char *arg,
  		gpointer    data,
  		GError    **error);
  
    public:
  
    unsigned num_iterations = 1;
    gboolean preprocess;
    hb_subset_input_t *input = nullptr;
  };
  
  static gboolean
  parse_gids (const char *name G_GNUC_UNUSED,
  	    const char *arg,
  	    gpointer    data,
  	    GError    **error)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *gids = hb_subset_input_glyph_set (subset_main->input);
  
    if (!is_remove && !is_add) hb_set_clear (gids);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (gids);
      if (!is_remove)
        hb_set_invert (gids);
      return true;
    }
  
    char *s = (char *) arg;
    char *p;
  
    while (s && *s)
    {
      while (*s && strchr (", ", *s))
        s++;
      if (!*s)
        break;
  
      errno = 0;
      hb_codepoint_t start_code = strtoul (s, &p, 10);
      if (s[0] == '-' || errno || s == p)
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "Failed parsing glyph-index at: '%s'", s);
        return false;
      }
  
      if (p && p[0] == '-') // ranges
      {
        s = ++p;
        hb_codepoint_t end_code = strtoul (s, &p, 10);
        if (s[0] == '-' || errno || s == p)
        {
  	g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		     "Failed parsing glyph-index at: '%s'", s);
  	return false;
        }
  
        if (end_code < start_code)
        {
  	g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		     "Invalid glyph-index range %u-%u", start_code, end_code);
  	return false;
        }
        if (!is_remove)
          hb_set_add_range (gids, start_code, end_code);
        else
          hb_set_del_range (gids, start_code, end_code);
      }
      else
      {
        if (!is_remove)
          hb_set_add (gids, start_code);
        else
          hb_set_del (gids, start_code);
      }
  
      s = p;
    }
  
    return true;
  }
  
  static gboolean
  parse_glyphs (const char *name G_GNUC_UNUSED,
  	      const char *arg,
  	      gpointer    data,
  	      GError    **error G_GNUC_UNUSED)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *gids = hb_subset_input_glyph_set (subset_main->input);
  
    if (!is_remove && !is_add) hb_set_clear (gids);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (gids);
      if (!is_remove)
        hb_set_invert (gids);
      return true;
    }
  
    const char *p = arg;
    const char *p_end = arg + strlen (arg);
  
    hb_font_t *font = hb_font_create (subset_main->face);
    while (p < p_end)
    {
      while (p < p_end && (*p == ' ' || *p == ','))
        p++;
  
      const char *end = p;
      while (end < p_end && *end != ' ' && *end != ',')
        end++;
  
      if (p < end)
      {
        hb_codepoint_t gid;
        if (!hb_font_get_glyph_from_name (font, p, end - p, &gid))
        {
  	g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		     "Failed parsing glyph name: '%s'", p);
  	return false;
        }
  
        if (!is_remove)
          hb_set_add (gids, gid);
        else
          hb_set_del (gids, gid);
      }
  
      p = end + 1;
    }
    hb_font_destroy (font);
  
    return true;
  }
  
  static gboolean
  parse_text (const char *name G_GNUC_UNUSED,
  	    const char *arg,
  	    gpointer    data,
  	    GError    **error G_GNUC_UNUSED)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *unicodes = hb_subset_input_unicode_set (subset_main->input);
  
    if (!is_remove && !is_add) hb_set_clear (unicodes);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (unicodes);
      if (!is_remove)
        hb_set_invert (unicodes);
      return true;
    }
  
    for (gchar *c = (gchar *) arg;
         *c;
         c = g_utf8_find_next_char(c, nullptr))
    {
      gunichar cp = g_utf8_get_char(c);
      if (!is_remove)
        hb_set_add (unicodes, cp);
      else
        hb_set_del (unicodes, cp);
    }
    return true;
  }
  
  static gboolean
  parse_unicodes (const char *name G_GNUC_UNUSED,
  		const char *arg,
  		gpointer    data,
  		GError    **error)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *unicodes = hb_subset_input_unicode_set (subset_main->input);
  
    if (!is_remove && !is_add) hb_set_clear (unicodes);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (unicodes);
      if (!is_remove)
        hb_set_invert (unicodes);
      return true;
    }
  
    // XXX TODO Ranges
  #define DELIMITERS "<+->{},;&#\\xXuUnNiI\n\t\v\f\r "
  
    char *s = (char *) arg;
    char *p;
  
    while (s && *s)
    {
      while (*s && strchr (DELIMITERS, *s))
        s++;
      if (!*s)
        break;
  
      errno = 0;
      hb_codepoint_t start_code = strtoul (s, &p, 16);
      if (errno || s == p)
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "Failed parsing Unicode at: '%s'", s);
        return false;
      }
  
      if (p && p[0] == '-') // ranges
      {
        s = ++p;
        hb_codepoint_t end_code = strtoul (s, &p, 16);
        if (s[0] == '-' || errno || s == p)
        {
  	g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		     "Failed parsing Unicode at: '%s'", s);
  	return false;
        }
  
        if (end_code < start_code)
        {
  	g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		     "Invalid Unicode range %u-%u", start_code, end_code);
  	return false;
        }
        if (!is_remove)
          hb_set_add_range (unicodes, start_code, end_code);
        else
          hb_set_del_range (unicodes, start_code, end_code);
      }
      else
      {
        if (!is_remove)
          hb_set_add (unicodes, start_code);
        else
          hb_set_del (unicodes, start_code);
      }
  
      s = p;
    }
  
    return true;
  }
  
  static gboolean
  parse_nameids (const char *name,
  	       const char *arg,
  	       gpointer    data,
  	       GError    **error)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *name_ids = hb_subset_input_set (subset_main->input, HB_SUBSET_SETS_NAME_ID);
  
  
    if (!is_remove && !is_add) hb_set_clear (name_ids);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (name_ids);
      if (!is_remove)
        hb_set_invert (name_ids);
      return true;
    }
  
    char *s = (char *) arg;
    char *p;
  
    while (s && *s)
    {
      while (*s && strchr (", ", *s))
        s++;
      if (!*s)
        break;
  
      errno = 0;
      hb_codepoint_t u = strtoul (s, &p, 10);
      if (errno || s == p)
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "Failed parsing nameID at: '%s'", s);
        return false;
      }
  
      if (!is_remove)
      {
        hb_set_add (name_ids, u);
      } else {
        hb_set_del (name_ids, u);
      }
  
      s = p;
    }
  
    return true;
  }
  
  static gboolean
  parse_name_languages (const char *name,
  		      const char *arg,
  		      gpointer    data,
  		      GError    **error)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *name_languages = hb_subset_input_set (subset_main->input, HB_SUBSET_SETS_NAME_LANG_ID);
  
    if (!is_remove && !is_add) hb_set_clear (name_languages);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (name_languages);
      if (!is_remove)
        hb_set_invert (name_languages);
      return true;
    }
  
    char *s = (char *) arg;
    char *p;
  
    while (s && *s)
    {
      while (*s && strchr (", ", *s))
        s++;
      if (!*s)
        break;
  
      errno = 0;
      hb_codepoint_t u = strtoul (s, &p, 10);
      if (errno || s == p)
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "Failed parsing name-language code at: '%s'", s);
        return false;
      }
  
      if (!is_remove)
      {
        hb_set_add (name_languages, u);
      } else {
        hb_set_del (name_languages, u);
      }
  
      s = p;
    }
  
    return true;
  }
  
  template <hb_subset_flags_t flag>
  static gboolean
  set_flag (const char *name,
  	  const char *arg,
  	  gpointer    data,
  	  GError    **error G_GNUC_UNUSED)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
  
    hb_subset_input_set_flags (subset_main->input,
  			     hb_subset_input_get_flags (subset_main->input) | flag);
  
    return true;
  }
  
  static gboolean
  parse_layout_tag_list (hb_subset_sets_t set_type,
                         const char *name,
                         const char *arg,
                         gpointer    data,
                         GError    **error G_GNUC_UNUSED)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *layout_tags = hb_subset_input_set (subset_main->input, set_type);
  
    if (!is_remove && !is_add) hb_set_clear (layout_tags);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (layout_tags);
      if (!is_remove)
        hb_set_invert (layout_tags);
      return true;
    }
  
    char *s = strtok((char *) arg, ", ");
    while (s)
    {
      if (strlen (s) > 4) // tags are at most 4 bytes
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
                     "Failed parsing table tag at: '%s'", s);
        return false;
      }
  
      hb_tag_t tag = hb_tag_from_string (s, strlen (s));
  
      if (!is_remove)
        hb_set_add (layout_tags, tag);
      else
        hb_set_del (layout_tags, tag);
  
      s = strtok(nullptr, ", ");
    }
  
    return true;
  }
  
  static gboolean
  parse_layout_features (const char *name,
  		       const char *arg,
  		       gpointer    data,
  		       GError    **error)
  
  {
    return parse_layout_tag_list (HB_SUBSET_SETS_LAYOUT_FEATURE_TAG,
                                  name,
                                  arg,
                                  data,
                                  error);
  }
  
  static gboolean
  parse_layout_scripts (const char *name,
  		       const char *arg,
  		       gpointer    data,
  		       GError    **error)
  
  {
    return parse_layout_tag_list (HB_SUBSET_SETS_LAYOUT_SCRIPT_TAG,
                                  name,
                                  arg,
                                  data,
                                  error);
  }
  
  static gboolean
  parse_drop_tables (const char *name,
  		   const char *arg,
  		   gpointer    data,
  		   GError    **error)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
    hb_bool_t is_remove = (name[strlen (name) - 1] == '-');
    hb_bool_t is_add = (name[strlen (name) - 1] == '+');
    hb_set_t *drop_tables = hb_subset_input_set (subset_main->input, HB_SUBSET_SETS_DROP_TABLE_TAG);
  
    if (!is_remove && !is_add) hb_set_clear (drop_tables);
  
    if (0 == strcmp (arg, "*"))
    {
      hb_set_clear (drop_tables);
      if (!is_remove)
        hb_set_invert (drop_tables);
      return true;
    }
  
    char *s = strtok((char *) arg, ", ");
    while (s)
    {
      if (strlen (s) > 4) // Table tags are at most 4 bytes.
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "Failed parsing table tag at: '%s'", s);
        return false;
      }
  
      hb_tag_t tag = hb_tag_from_string (s, strlen (s));
  
      if (!is_remove)
        hb_set_add (drop_tables, tag);
      else
        hb_set_del (drop_tables, tag);
  
      s = strtok(nullptr, ", ");
    }
  
    return true;
  }
  
  #ifdef HB_EXPERIMENTAL_API
  #ifndef HB_NO_VAR
  static gboolean
  parse_instance (const char *name,
  		const char *arg,
  		gpointer    data,
  		GError    **error)
  {
    subset_main_t *subset_main = (subset_main_t *) data;
  
    char *s = strtok((char *) arg, "=");
    while (s)
    {
      unsigned len = strlen (s);
      if (len > 4)  //Axis tags are 4 bytes.
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "Failed parsing axis tag at: '%s'", s);
        return false;
      }
  
      hb_tag_t axis_tag = hb_tag_from_string (s, len);
  
      s = strtok(nullptr, ", ");
      if (!s)
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "Value not specified for axis: %c%c%c%c", HB_UNTAG (axis_tag));
        return false;
      }
  
      if (strcmp (s, "drop") == 0)
      {
        if (!hb_subset_input_pin_axis_to_default (subset_main->input, subset_main->face, axis_tag))
        {
          g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
                       "Cannot pin axis: '%c%c%c%c', not present in fvar", HB_UNTAG (axis_tag));
          return false;
        }
      }
      else
      {
        errno = 0;
        char *p;
        float axis_value = strtof (s, &p);
        if (errno || s == p)
        {
          g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
                       "Failed parsing axis value at: '%s'", s);
          return false;
        }
  
        if (!hb_subset_input_pin_axis_location (subset_main->input, subset_main->face, axis_tag, axis_value))
        {
          g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
                       "Cannot pin axis: '%c%c%c%c', not present in fvar", HB_UNTAG (axis_tag));
          return false;
        }
      }
      s = strtok(nullptr, "=");
    }
  
    return true;
  }
  #endif
  #endif
  
  template <GOptionArgFunc line_parser, bool allow_comments=true>
  static gboolean
  parse_file_for (const char *name,
  		const char *arg,
  		gpointer    data,
  		GError    **error)
  {
    FILE *fp = nullptr;
    if (0 != strcmp (arg, "-"))
      fp = fopen (arg, "r");
    else
      fp = stdin;
  
    if (!fp)
    {
      g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
  		 "Failed opening file `%s': %s",
  		 arg, strerror (errno));
      return false;
    }
  
    GString *gs = g_string_new (nullptr);
    do
    {
      g_string_set_size (gs, 0);
      char buf[BUFSIZ];
      while (fgets (buf, sizeof (buf), fp))
      {
        unsigned bytes = strlen (buf);
        if (bytes && buf[bytes - 1] == '\n')
        {
  	bytes--;
  	g_string_append_len (gs, buf, bytes);
  	break;
        }
        g_string_append_len (gs, buf, bytes);
      }
      if (ferror (fp))
      {
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
  		   "Failed reading file `%s': %s",
  		   arg, strerror (errno));
        return false;
      }
      g_string_append_c (gs, '\0');
  
      if (allow_comments)
      {
        char *comment = strchr (gs->str, '#');
        if (comment)
          *comment = '\0';
      }
  
      line_parser ("+", gs->str, data, error);
  
      if (*error)
        break;
    }
    while (!feof (fp));
  
    g_string_free (gs, false);
  
    return true;
  }
  
  gboolean
  subset_main_t::collect_face (const char *name,
  			     const char *arg,
  			     gpointer    data,
  			     GError    **error)
  {
    face_options_t *thiz = (face_options_t *) data;
  
    if (!thiz->font_file)
    {
      thiz->font_file = g_strdup (arg);
      return true;
    }
  
    return true;
  }
  
  gboolean
  subset_main_t::collect_rest (const char *name,
  			     const char *arg,
  			     gpointer    data,
  			     GError    **error)
  {
    subset_main_t *thiz = (subset_main_t *) data;
  
    if (!thiz->font_file)
    {
      thiz->font_file = g_strdup (arg);
      return true;
    }
  
    parse_text (name, arg, data, error);
    return true;
  }
  
  void
  subset_main_t::add_options ()
  {
    set_summary ("Subset fonts to specification.");
  
    face_options_t::add_options (this);
  
    GOptionEntry glyphset_entries[] =
    {
      {"gids",		0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids,
       "Specify glyph IDs or ranges to include in the subset.\n"
       "                                                       "
       "Use --gids-=... to subtract codepoints from the current set.", "list of glyph indices/ranges or *"},
      {"gids-",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids,			"Specify glyph IDs or ranges to remove from the subset", "list of glyph indices/ranges or *"},
      {"gids+",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids,			"Specify glyph IDs or ranges to include in the subset", "list of glyph indices/ranges or *"},
      {"gids-file",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_file_for<parse_gids>,	"Specify file to read glyph IDs or ranges from", "filename"},
      {"glyphs",		0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_glyphs,			"Specify glyph names to include in the subset. Use --glyphs-=... to subtract glyphs from the current set.", "list of glyph names or *"},
      {"glyphs+",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_glyphs,			"Specify glyph names to include in the subset", "list of glyph names"},
      {"glyphs-",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_glyphs,			"Specify glyph names to remove from the subset", "list of glyph names"},
  
  
      {"glyphs-file",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_file_for<parse_glyphs>,	"Specify file to read glyph names from", "filename"},
  
      {"text",		0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_text,			"Specify text to include in the subset. Use --text-=... to subtract codepoints from the current set.", "string"},
      {"text-",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_text,			"Specify text to remove from the subset", "string"},
      {"text+",		0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_text,			"Specify text to include in the subset", "string"},
  
  
      {"text-file",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_file_for<parse_text, false>,"Specify file to read text from", "filename"},
      {"unicodes",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_unicodes,
       "Specify Unicode codepoints or ranges to include in the subset. Use * to include all codepoints.\n"
       "                                                       "
       "--unicodes-=... can be used to subtract codepoints from the current set.\n"
       "                                                       "
       "For example: --unicodes=* --unicodes-=41,42,43 would create a subset with all codepoints\n"
       "                                                       "
       "except for 41, 42, 43.",
       "list of hex numbers/ranges or *"},
      {"unicodes-",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_unicodes, "Specify Unicode codepoints or ranges to remove from the subset", "list of hex numbers/ranges or *"},
      {"unicodes+",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_unicodes, "Specify Unicode codepoints or ranges to include in the subset", "list of hex numbers/ranges or *"},
  
      {"unicodes-file",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_file_for<parse_unicodes>,"Specify file to read Unicode codepoints or ranges from", "filename"},
      {nullptr}
    };
    add_group (glyphset_entries,
  	     "subset-glyphset",
  	     "Subset glyph-set option:",
  	     "Subsetting glyph-set options",
  	     this);
  
    GOptionEntry other_entries[] =
    {
      {"name-IDs",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_nameids,		"Subset specified nameids. Use --name-IDs-=... to subtract from the current set.", "list of int numbers or *"},
      {"name-IDs-",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_nameids,		"Subset specified nameids", "list of int numbers or *"},
      {"name-IDs+",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_nameids,		"Subset specified nameids", "list of int numbers or *"},
      {"name-languages",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_name_languages,	"Subset nameRecords with specified language IDs. Use --name-languages-=... to subtract from the current set.", "list of int numbers or *"},
      {"name-languages-",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_name_languages,	"Subset nameRecords with specified language IDs", "list of int numbers or *"},
      {"name-languages+",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_name_languages,	"Subset nameRecords with specified language IDs", "list of int numbers or *"},
  
      {"layout-features",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_features,	"Specify set of layout feature tags that will be preserved. Use --layout-features-=... to subtract from the current set.", "list of string table tags or *"},
      {"layout-features+",0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_features,	"Specify set of layout feature tags that will be preserved", "list of string tags or *"},
      {"layout-features-",0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_features,	"Specify set of layout feature tags that will be preserved", "list of string tags or *"},
  
      {"layout-scripts",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_scripts,	"Specify set of layout script tags that will be preserved. Use --layout-scripts-=... to subtract from the current set.", "list of string table tags or *"},
      {"layout-scripts+",0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_scripts,	"Specify set of layout script tags that will be preserved", "list of string tags or *"},
      {"layout-scripts-",0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_scripts,	"Specify set of layout script tags that will be preserved", "list of string tags or *"},
  
      {"drop-tables",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables,	"Drop the specified tables. Use --drop-tables-=... to subtract from the current set.", "list of string table tags or *"},
      {"drop-tables+",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables,	"Drop the specified tables.", "list of string table tags or *"},
      {"drop-tables-",	0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables,	"Drop the specified tables.", "list of string table tags or *"},
  #ifdef HB_EXPERIMENTAL_API
  #ifndef HB_NO_VAR
      {"instance",	0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_instance,
       "(Partially|Fully) Instantiate a variable font. A location consists of the tag of a variation axis, followed by '=', followed by a\n"
       "number or the literal string 'drop'\n"
       "                                                       "
       "For example: --instance=\"wdth=100 wght=200\" or --instance=\"wdth=drop\"\n"
       "Note: currently only fully instancing to the default location is supported\n",
       "list of comma separated axis-locations"},
  #endif
  #endif
      {nullptr}
    };
    add_group (other_entries,
  	     "subset-other",
  	     "Subset other option:",
  	     "Subsetting other options",
  	     this);
  
    GOptionEntry flag_entries[] =
    {
      {"no-hinting",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NO_HINTING>,		"Whether to drop hints", nullptr},
      {"retain-gids",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_RETAIN_GIDS>,		"If set don't renumber glyph ids in the subset.", nullptr},
      {"desubroutinize",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_DESUBROUTINIZE>,		"Remove CFF/CFF2 use of subroutines", nullptr},
      {"name-legacy",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NAME_LEGACY>,		"Keep legacy (non-Unicode) 'name' table entries", nullptr},
      {"set-overlaps-flag",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG>,	"Set the overlaps flag on each glyph.", nullptr},
      {"notdef-outline",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NOTDEF_OUTLINE>,		"Keep the outline of \'.notdef\' glyph", nullptr},
      {"no-prune-unicode-ranges",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES>,	"Don't change the 'OS/2 ulUnicodeRange*' bits.", nullptr},
      {"glyph-names",		0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_GLYPH_NAMES>,		"Keep PS glyph names in TT-flavored fonts. ", nullptr},
      {"passthrough-tables",	0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_PASSTHROUGH_UNRECOGNIZED>,	"Do not drop tables that the tool does not know how to subset.", nullptr},
      {"preprocess-face",		0, 0, G_OPTION_ARG_NONE, &this->preprocess,
       "If set preprocesses the face with the add accelerator option before actually subsetting.", nullptr},
      {nullptr}
    };
    add_group (flag_entries,
  	     "subset-flags",
  	     "Subset boolean option:",
  	     "Subsetting boolean options",
  	     this);
  
    GOptionEntry app_entries[] =
    {
      {"num-iterations",	'n', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_INT,
       &this->num_iterations,
       "Run subsetter N times (default: 1)", "N"},
      {nullptr}
    };
    add_group (app_entries,
  	     "subset-app",
  	     "Subset app option:",
  	     "Subsetting application options",
  	     this);
  
    output_options_t::add_options (this);
  
    GOptionEntry entries[] =
    {
      {G_OPTION_REMAINING,	0, G_OPTION_FLAG_IN_MAIN,
  			      G_OPTION_ARG_CALLBACK,	(gpointer) &collect_rest,	nullptr,	"[FONT-FILE] [TEXT]"},
      {nullptr}
    };
    add_main_group (entries, this);
    option_parser_t::add_options ();
  }
  
  int
  main (int argc, char **argv)
  {
    return batch_main<subset_main_t, true> (argc, argv);
  }
  

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