365 lines
12 KiB
C++
365 lines
12 KiB
C++
/*
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* Copyright © 2019 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Garret Rieger
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*/
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#ifndef SUBSET_OPTIONS_HH
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#define SUBSET_OPTIONS_HH
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#include "options.hh"
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#include "hb-subset.h"
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struct subset_options_t
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{
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subset_options_t ()
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: input (hb_subset_input_create_or_fail ())
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{}
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~subset_options_t ()
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{
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hb_subset_input_destroy (input);
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}
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void add_options (option_parser_t *parser);
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unsigned num_iterations = 1;
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hb_subset_input_t *input = nullptr;
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};
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static gboolean
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parse_gids (const char *name G_GNUC_UNUSED,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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subset_options_t *subset_opts = (subset_options_t *) data;
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hb_set_t *gids = hb_subset_input_glyph_set (subset_opts->input);
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char *s = (char *) arg;
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char *p;
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while (s && *s)
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{
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while (*s && strchr (", ", *s))
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s++;
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if (!*s)
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break;
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errno = 0;
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hb_codepoint_t start_code = strtoul (s, &p, 10);
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if (s[0] == '-' || errno || s == p)
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{
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hb_set_destroy (gids);
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing gids values at: '%s'", s);
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return false;
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}
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if (p && p[0] == '-') //gid ranges
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{
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s = ++p;
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hb_codepoint_t end_code = strtoul (s, &p, 10);
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if (s[0] == '-' || errno || s == p)
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{
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hb_set_destroy (gids);
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing gids values at: '%s'", s);
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return false;
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}
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if (end_code < start_code)
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{
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hb_set_destroy (gids);
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Invalid gids range value %u-%u", start_code, end_code);
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return false;
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}
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hb_set_add_range (gids, start_code, end_code);
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}
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else
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{
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hb_set_add (gids, start_code);
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}
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s = p;
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}
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return true;
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}
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static gboolean
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parse_nameids (const char *name,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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subset_options_t *subset_opts = (subset_options_t *) data;
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hb_set_t *name_ids = hb_subset_input_nameid_set (subset_opts->input);
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char last_name_char = name[strlen (name) - 1];
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if (last_name_char != '+' && last_name_char != '-')
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hb_set_clear (name_ids);
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if (0 == strcmp (arg, "*"))
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{
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if (last_name_char == '-')
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hb_set_del_range (name_ids, 0, 0x7FFF);
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else
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hb_set_add_range (name_ids, 0, 0x7FFF);
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return true;
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}
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char *s = (char *) arg;
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char *p;
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while (s && *s)
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{
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while (*s && strchr (", ", *s))
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s++;
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if (!*s)
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break;
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errno = 0;
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hb_codepoint_t u = strtoul (s, &p, 10);
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if (errno || s == p)
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{
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hb_set_destroy (name_ids);
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing nameID values at: '%s'", s);
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return false;
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}
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if (last_name_char != '-')
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{
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hb_set_add (name_ids, u);
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} else {
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hb_set_del (name_ids, u);
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}
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s = p;
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}
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return true;
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}
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static gboolean
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parse_name_languages (const char *name,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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subset_options_t *subset_opts = (subset_options_t *) data;
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hb_set_t *name_languages = hb_subset_input_namelangid_set (subset_opts->input);
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char last_name_char = name[strlen (name) - 1];
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if (last_name_char != '+' && last_name_char != '-')
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hb_set_clear (name_languages);
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if (0 == strcmp (arg, "*"))
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{
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if (last_name_char == '-')
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hb_set_del_range (name_languages, 0, 0x5FFF);
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else
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hb_set_add_range (name_languages, 0, 0x5FFF);
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return true;
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}
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char *s = (char *) arg;
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char *p;
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while (s && *s)
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{
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while (*s && strchr (", ", *s))
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s++;
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if (!*s)
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break;
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errno = 0;
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hb_codepoint_t u = strtoul (s, &p, 10);
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if (errno || s == p)
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{
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hb_set_destroy (name_languages);
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing name_languages values at: '%s'", s);
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return false;
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}
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if (last_name_char != '-')
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{
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hb_set_add (name_languages, u);
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} else {
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hb_set_del (name_languages, u);
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}
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s = p;
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}
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return true;
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}
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template <hb_subset_flags_t flag>
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static gboolean
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set_flag (const char *name,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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subset_options_t *subset_opts = (subset_options_t *) data;
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hb_subset_input_set_flags (subset_opts->input,
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hb_subset_input_get_flags (subset_opts->input) | flag);
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return true;
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}
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static gboolean
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parse_layout_features (const char *name,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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subset_options_t *subset_opts = (subset_options_t *) data;
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hb_set_t *layout_features = hb_subset_input_layout_features_set (subset_opts->input);
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char last_name_char = name[strlen (name) - 1];
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if (last_name_char != '+' && last_name_char != '-')
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hb_set_clear (layout_features);
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if (0 == strcmp (arg, "*"))
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{
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if (last_name_char == '-')
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{
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hb_set_clear (layout_features);
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hb_subset_input_set_flags (subset_opts->input,
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hb_subset_input_get_flags (subset_opts->input) & ~HB_SUBSET_FLAGS_RETAIN_ALL_FEATURES);
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} else {
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hb_subset_input_set_flags (subset_opts->input,
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hb_subset_input_get_flags (subset_opts->input) | HB_SUBSET_FLAGS_RETAIN_ALL_FEATURES);
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}
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return true;
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}
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char *s = strtok((char *) arg, ", ");
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while (s)
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{
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if (strlen (s) > 4) // table tags are at most 4 bytes
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing table tag values at: '%s'", s);
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return false;
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}
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hb_tag_t tag = hb_tag_from_string (s, strlen (s));
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if (last_name_char != '-')
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hb_set_add (layout_features, tag);
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else
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hb_set_del (layout_features, tag);
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s = strtok(nullptr, ", ");
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}
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return true;
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}
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static gboolean
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parse_drop_tables (const char *name,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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subset_options_t *subset_opts = (subset_options_t *) data;
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hb_set_t *drop_tables = hb_subset_input_drop_tables_set (subset_opts->input);
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char last_name_char = name[strlen (name) - 1];
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if (last_name_char != '+' && last_name_char != '-')
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hb_set_clear (drop_tables);
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char *s = strtok((char *) arg, ", ");
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while (s)
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{
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if (strlen (s) > 4) // Table tags are at most 4 bytes.
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing table tag values at: '%s'", s);
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return false;
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}
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hb_tag_t tag = hb_tag_from_string (s, strlen (s));
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if (last_name_char != '-')
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hb_set_add (drop_tables, tag);
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else
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hb_set_del (drop_tables, tag);
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s = strtok(nullptr, ", ");
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}
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return true;
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}
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void
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subset_options_t::add_options (option_parser_t *parser)
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{
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GOptionEntry entries[] =
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{
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{"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},
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{"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},
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{"gids", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids, "Specify glyph IDs or ranges to include in the subset", "list of comma/whitespace-separated int numbers or ranges"},
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{"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},
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{"name-IDs", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_nameids, "Subset specified nameids", "list of int numbers"},
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{"name-IDs-", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_nameids, "Subset specified nameids", "list of int numbers"},
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{"name-IDs+", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_nameids, "Subset specified nameids", "list of int numbers"},
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{"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},
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{"name-languages", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_name_languages, "Subset nameRecords with specified language IDs", "list of int numbers"},
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{"name-languages-", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_name_languages, "Subset nameRecords with specified language IDs", "list of int numbers"},
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{"name-languages+", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_name_languages, "Subset nameRecords with specified language IDs", "list of int numbers"},
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{"layout-features", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_features, "Specify set of layout feature tags that will be preserved", "list of string table tags."},
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{"layout-features+", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_features, "Specify set of layout feature tags that will be preserved", "list of string table tags."},
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{"layout-features-", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_layout_features, "Specify set of layout feature tags that will be preserved", "list of string table tags."},
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{"drop-tables", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables, "Drop the specified tables.", "list of string table tags."},
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{"drop-tables+", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables, "Drop the specified tables.", "list of string table tags."},
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{"drop-tables-", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables, "Drop the specified tables.", "list of string table tags."},
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{"num-iterations", 'n', 0, G_OPTION_ARG_INT,
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&this->num_iterations,
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"Run subsetter N times (default: 1)", "N"},
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{"set-overlaps-flag", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG>,
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"Set the overlaps flag on each glyph.", nullptr},
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{"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},
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{"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},
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{"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},
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{nullptr}
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};
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parser->add_group (entries,
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"subset",
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"Subset options:",
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"Options subsetting",
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this);
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}
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#endif
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