harfbuzz/src/test-gsub-get-alternates.cc

87 lines
2.6 KiB
C++

/*
* Copyright © 2010,2011 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): Behdad Esfahbod
*/
#include <hb.h>
#include <hb-ot.h>
#include <stdlib.h>
#include <stdio.h>
int
main (int argc, char **argv)
{
if (argc != 3) {
fprintf (stderr, "usage: %s font-file text\n", argv[0]);
exit (1);
}
/* Create the face */
hb_blob_t *blob = hb_blob_create_from_file_or_fail (argv[1]);
hb_face_t *face = hb_face_create (blob, 0 /* first face */);
hb_blob_destroy (blob);
blob = nullptr;
hb_font_t *font = hb_font_create (face);
hb_buffer_t *buffer = hb_buffer_create ();
hb_buffer_add_utf8 (buffer, argv[2], -1, 0, -1);
hb_buffer_guess_segment_properties (buffer);
hb_shape (font, buffer, NULL, 0);
hb_tag_t features[] = {HB_TAG('a','a','l','t'), HB_TAG_NONE};
hb_set_t *lookup_indexes = hb_set_create ();
hb_ot_layout_collect_lookups (face,
HB_OT_TAG_GSUB,
NULL, NULL,
features,
lookup_indexes);
printf ("lookups %u\n", hb_set_get_population (lookup_indexes));
unsigned count;
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, &count);
for (unsigned i = 0; i < count; i++)
{
unsigned alt_count = 0;
for (unsigned lookup_index = HB_SET_VALUE_INVALID;
hb_set_next (lookup_indexes, &lookup_index);)
if ((alt_count = hb_ot_layout_lookup_get_glyph_alternates (face,
lookup_index,
info[i].codepoint,
0,
NULL,
NULL)))
break;
printf ("glyph %u alt count %u\n", info[i].codepoint, alt_count);
}
hb_set_destroy (lookup_indexes);
hb_buffer_destroy (buffer);
hb_font_destroy (font);
hb_face_destroy (face);
return 0;
}