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https://github.com/harfbuzz/harfbuzz.git
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b0d52abe97
cmap14 subsetting code was not considering variation selectors in the input unicode set when deciding which variant glyphs to keep. This updates subsetting to only keeps variant glyphs if their variation selector code point is in the input unicodes set. For https://github.com/harfbuzz/harfbuzz/issues/4911
196 lines
6.3 KiB
C
196 lines
6.3 KiB
C
/*
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* Copyright © 2018 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): Roderick Sheeter
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*/
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#include "hb-test.h"
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#include "hb-subset-test.h"
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/* Unit tests for cmap subsetting */
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static void
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test_subset_cmap (void)
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{
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hb_face_t *face_abc = hb_test_open_font_file ("fonts/Roboto-Regular.abc.ttf");
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hb_face_t *face_ac = hb_test_open_font_file ("fonts/Roboto-Regular.ac.ttf");
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hb_set_t *codepoints = hb_set_create ();
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hb_face_t *face_abc_subset;
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hb_set_add (codepoints, 97);
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hb_set_add (codepoints, 99);
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face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('c','m','a','p'));
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hb_face_destroy (face_abc_subset);
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hb_face_destroy (face_abc);
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hb_face_destroy (face_ac);
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}
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static void
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test_subset_cmap_non_consecutive_glyphs (void)
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{
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hb_face_t *face = hb_test_open_font_file ("fonts/Roboto-Regular.D7,D8,D9,DA,DE.ttf");
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hb_set_t *codepoints = hb_set_create ();
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hb_face_t *face_subset;
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hb_set_add (codepoints, 0xD7);
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hb_set_add (codepoints, 0xD8);
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hb_set_add (codepoints, 0xD9);
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hb_set_add (codepoints, 0xDA);
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hb_set_add (codepoints, 0xDE);
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face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face, face_subset, HB_TAG ('c','m','a','p'));
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hb_face_destroy (face_subset);
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hb_face_destroy (face);
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}
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static void
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test_subset_cmap_noop (void)
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{
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hb_face_t *face_abc = hb_test_open_font_file ("fonts/Roboto-Regular.abc.ttf");
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hb_set_t *codepoints = hb_set_create();
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hb_face_t *face_abc_subset;
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hb_set_add (codepoints, 97);
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hb_set_add (codepoints, 98);
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hb_set_add (codepoints, 99);
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face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('c','m','a','p'));
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hb_face_destroy (face_abc_subset);
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hb_face_destroy (face_abc);
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}
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static void
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test_subset_cmap4_no_exceeding_maximum_codepoint (void)
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{
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hb_face_t *face_origin = hb_test_open_font_file ("fonts/Mplus1p-Regular.ttf");
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hb_face_t *face_expected = hb_test_open_font_file ("fonts/Mplus1p-Regular-cmap4-testing.ttf");
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hb_set_t *codepoints = hb_set_create ();
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hb_face_t *face_subset;
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hb_set_add (codepoints, 0x20);
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hb_set_add (codepoints, 0x21);
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hb_set_add (codepoints, 0x1d542);
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hb_set_add (codepoints, 0x201a2);
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face_subset = hb_subset_test_create_subset (face_origin, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_expected, face_subset, HB_TAG ('c','m','a','p'));
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hb_face_destroy (face_subset);
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hb_face_destroy (face_expected);
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hb_face_destroy (face_origin);
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}
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static void
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test_subset_cmap_empty_tables (void)
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{
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hb_face_t *face_abc = hb_test_open_font_file ("fonts/Roboto-Regular.abc.ttf");
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hb_face_t *face_empty = hb_test_open_font_file ("fonts/Roboto-Regular.empty.ttf");
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hb_set_t *codepoints = hb_set_create ();
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hb_face_t *face_abc_subset;
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hb_set_add (codepoints, 100);
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hb_set_add (codepoints, 101);
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face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_empty, face_abc_subset, HB_TAG ('c','m','a','p'));
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hb_face_destroy (face_abc_subset);
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hb_face_destroy (face_abc);
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hb_face_destroy (face_empty);
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}
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static void
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test_subset_cmap_noto_color_emoji_noop (void)
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{
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hb_face_t *face = hb_test_open_font_file ("fonts/NotoColorEmoji.cmap.ttf");
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hb_set_t *codepoints = hb_set_create ();
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hb_face_t *face_subset;
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hb_set_add (codepoints, 0x38);
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hb_set_add (codepoints, 0x39);
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hb_set_add (codepoints, 0xAE);
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hb_set_add (codepoints, 0x2049);
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hb_set_add (codepoints, 0x20E3);
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hb_set_add (codepoints, 0xfe0f);
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face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face, face_subset, HB_TAG ('c','m','a','p'));
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hb_face_destroy (face_subset);
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hb_face_destroy (face);
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}
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static void
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test_subset_cmap_noto_color_emoji_non_consecutive_glyphs (void)
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{
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hb_face_t *face = hb_test_open_font_file ("fonts/NotoColorEmoji.cmap.ttf");
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hb_face_t *face_expected = hb_test_open_font_file ("fonts/NotoColorEmoji.cmap.38,AE,2049.ttf");
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hb_set_t *codepoints = hb_set_create ();
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hb_face_t *face_subset;
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hb_set_add (codepoints, 0x38);
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hb_set_add (codepoints, 0xAE);
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hb_set_add (codepoints, 0x2049);
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hb_set_add (codepoints, 0xfe0f);
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face_subset = hb_subset_test_create_subset (face, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_expected, face_subset, HB_TAG ('c','m','a','p'));
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hb_face_destroy (face_subset);
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hb_face_destroy (face_expected);
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hb_face_destroy (face);
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}
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// TODO(rsheeter) test cmap to no codepoints
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int
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main (int argc, char **argv)
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{
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hb_test_init (&argc, &argv);
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hb_test_add (test_subset_cmap);
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hb_test_add (test_subset_cmap_noop);
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hb_test_add (test_subset_cmap_non_consecutive_glyphs);
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hb_test_add (test_subset_cmap4_no_exceeding_maximum_codepoint);
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hb_test_add (test_subset_cmap_empty_tables);
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hb_test_add (test_subset_cmap_noto_color_emoji_noop);
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hb_test_add (test_subset_cmap_noto_color_emoji_non_consecutive_glyphs);
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return hb_test_run();
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}
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