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[util/hb-subset] Add --glyphs for passing glyph names 

Part of https://github.com/harfbuzz/harfbuzz/issues/2455
This commit is contained in:
Behdad Esfahbod 2021-08-11 22:07:45 -06:00
parent 5b07c3c7d0
commit bf80b7ea45
1 changed files with 62 additions and 1 deletions
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63
util/hb-subset.cc
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@ -110,7 +110,9 @@ struct subset_main_t : option_parser_t, face_options_t, output_options_t<false>
unsigned num_iterations = 1;
hb_subset_input_t *input = nullptr;
/* Internal, ouch. */
bool all_unicodes = false;
GString *glyph_names = nullptr;
};
static gboolean
@ -173,6 +175,24 @@ parse_gids (const char *name G_GNUC_UNUSED,
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;
if (!subset_main->glyph_names)
subset_main->glyph_names = g_string_new (nullptr);
else
g_string_append_c (subset_main->glyph_names, ' ');
g_string_append (subset_main->glyph_names, arg);
return true;
}
static gboolean
parse_text (const char *name G_GNUC_UNUSED,
const char *arg,
@ -212,6 +232,7 @@ parse_unicodes (const char *name G_GNUC_UNUSED,
return true;
}
// XXX TODO Ranges
hb_set_t *codepoints = hb_subset_input_unicode_set (subset_main->input);
{
char *s = (char *) arg;
@ -484,11 +505,12 @@ subset_main_t::add_options ()
{
{"gids", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids, "Specify glyph IDs or ranges to include in the subset", "list of glyph indices/ranges"},
// gids-file
// glyphs
{"glyphs", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_glyphs, "Specify glyph names to include in the subset", "list of glyph names"},
// glyphs-file
{"text", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_text, "Specify text to include in the subset", "string"},
// text-file
{"unicodes", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_unicodes, "Specify Unicode codepoints or ranges to include in the subset", "list of hex numbers/ranges"},
// unicodes-file
{nullptr}
};
add_group (glyphset_entries,
@ -574,6 +596,45 @@ subset_main_t::post_parse (GError **error G_GNUC_UNUSED)
hb_face_collect_unicodes (face, codepoints);
all_unicodes = false;
}
if (glyph_names)
{
char *p = glyph_names->str;
char *p_end = p + glyph_names->len;
hb_set_t *gids = hb_subset_input_glyph_set (input);
hb_font_t *font = hb_font_create (face);
while (p < p_end)
{
while (p < p_end && (*p == ' ' || *p == ','))
p++;
char *end = p;
while (end < p_end && *end != ' ' && *end != ',')
end++;
*end = '\0';
if (p < end)
{
hb_codepoint_t gid;
if (!hb_font_get_glyph_from_name (font, p, -1, &gid))
{
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Failed parsing glyph name: '%s'", p);
return;
}
hb_set_add (gids, gid);
}
p = end + 1;
}
hb_font_destroy (font);
g_string_free (glyph_names, false);
glyph_names = nullptr;
}
}
int