HarfBuzz text shaping engine http://harfbuzz.github.io/
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/*
* Copyright © 2020 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): Calder Kitagawa
*/
#include "hb-test.h"
#include "hb-subset-test.h"
/* Unit tests for CBDT/CBLC subsetting */
static void
test_subset_cbdt_noop (void)
{
hb_face_t *face = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.ttf");
hb_set_t *codepoints = hb_set_create ();
hb_face_t *face_subset;
hb_set_add (codepoints, 0x38);
hb_set_add (codepoints, 0x39);
hb_set_add (codepoints, 0xAE);
hb_set_add (codepoints, 0x2049);
hb_set_add (codepoints, 0x20E3);
face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
hb_set_destroy (codepoints);
hb_subset_test_check (face, face_subset, HB_TAG ('C','B','L','C'));
hb_subset_test_check (face, face_subset, HB_TAG ('C','B','D','T'));
hb_face_destroy (face_subset);
hb_face_destroy (face);
}
static void
test_subset_cbdt_keep_one (void)
{
hb_face_t *face = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.ttf");
hb_face_t *face_expected = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.default.39.ttf");
hb_set_t *codepoints = hb_set_create ();
hb_face_t *face_subset;
hb_set_add (codepoints, 0x39);
face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
hb_set_destroy (codepoints);
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','L','C'));
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','D','T'));
hb_face_destroy (face_subset);
hb_face_destroy (face_expected);
hb_face_destroy (face);
}
static void
test_subset_cbdt_keep_one_last_subtable (void)
{
hb_face_t *face = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.ttf");
hb_face_t *face_expected = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.default.2049.ttf");
hb_set_t *codepoints = hb_set_create ();
hb_face_t *face_subset;
hb_set_add (codepoints, 0x2049);
face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
hb_set_destroy (codepoints);
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','L','C'));
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','D','T'));
hb_face_destroy (face_subset);
hb_face_destroy (face_expected);
hb_face_destroy (face);
}
static void
test_subset_cbdt_keep_multiple_subtables (void)
{
hb_face_t *face = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.multiple_size_tables.ttf");
hb_face_t *face_expected = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.multiple_size_tables.default.38,AE,2049.ttf");
hb_set_t *codepoints = hb_set_create ();
hb_face_t *face_subset;
hb_set_add (codepoints, 0x38);
hb_set_add (codepoints, 0xAE);
hb_set_add (codepoints, 0x2049);
face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
hb_set_destroy (codepoints);
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','L','C'));
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','D','T'));
hb_face_destroy (face_subset);
hb_face_destroy (face_expected);
hb_face_destroy (face);
}
static void
test_subset_cbdt_index_format_3 (void)
{
hb_face_t *face = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.index_format3.ttf");
hb_face_t *face_expected = hb_test_open_font_file ("fonts/NotoColorEmoji.subset.index_format3.default.38,AE,2049.ttf");
hb_set_t *codepoints = hb_set_create ();
hb_face_t *face_subset;
hb_set_add (codepoints, 0x38);
hb_set_add (codepoints, 0xAE);
hb_set_add (codepoints, 0x2049);
face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
hb_set_destroy (codepoints);
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','L','C'));
hb_subset_test_check (face_expected, face_subset, HB_TAG ('C','B','D','T'));
hb_face_destroy (face_subset);
hb_face_destroy (face_expected);
hb_face_destroy (face);
}
// TODO: add support/tests for index formats 2,4,5 (image formats are treated as
// opaque blobs when subsetting so don't need to be tested separately).
// TODO: add a test that keeps no codepoints.
int
main (int argc, char **argv)
{
hb_test_init (&argc, &argv);
hb_test_add (test_subset_cbdt_noop);
hb_test_add (test_subset_cbdt_keep_one);
hb_test_add (test_subset_cbdt_keep_one_last_subtable);
// The following use manually crafted expectation files as they are not
// binary compatible with FontTools.
hb_test_add (test_subset_cbdt_keep_multiple_subtables);
// Can use FontTools after https://github.com/fonttools/fonttools/issues/1817
// is resolved.
hb_test_add (test_subset_cbdt_index_format_3);
return hb_test_run();
}