1 /*
2 * Copyright © 2018 Google, Inc.
3 *
4 * This is part of HarfBuzz, a text shaping library.
5 *
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
11 *
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16 * DAMAGE.
17 *
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23 *
24 * Google Author(s): Garret Rieger
25 */
26
27 #include "hb-test.h"
28 #include "hb-subset-test.h"
29
30 /* Unit tests for hmtx subsetting */
31
check_num_vmetrics(hb_face_t * face,uint16_t expected_num_vmetrics)32 static void check_num_vmetrics(hb_face_t *face, uint16_t expected_num_vmetrics)
33 {
34 hb_blob_t *vhea_blob = hb_face_reference_table (face, HB_TAG ('v','h','e','a'));
35 hb_blob_t *vmtx_blob = hb_face_reference_table (face, HB_TAG ('v','m','t','x'));
36
37 unsigned int vhea_len;
38 uint8_t *raw_vhea = (uint8_t *) hb_blob_get_data(vhea_blob, &vhea_len);
39 uint16_t num_vmetrics = (raw_vhea[vhea_len - 2] << 8) + raw_vhea[vhea_len - 1];
40 g_assert_cmpuint(expected_num_vmetrics, ==, num_vmetrics);
41
42 hb_blob_destroy (vhea_blob);
43 hb_blob_destroy (vmtx_blob);
44 }
45
46 static void
test_subset_vmtx_simple_subset(void)47 test_subset_vmtx_simple_subset (void)
48 {
49 hb_face_t *face_full = hb_test_open_font_file ("fonts/Mplus1p-Regular.660E,6975,73E0,5EA6,8F38,6E05.ttf");
50 hb_face_t *face_subset = hb_test_open_font_file ("fonts/Mplus1p-Regular.660E.ttf");
51 hb_face_t *face_full_subset;
52
53 hb_set_t *codepoints = hb_set_create ();
54 hb_set_add (codepoints, 0x660E);
55
56 face_full_subset = hb_subset_test_create_subset (face_full, hb_subset_test_create_input (codepoints));
57 hb_set_destroy (codepoints);
58
59 check_num_vmetrics(face_full_subset, 1); /* nothing has same width */
60 hb_subset_test_check (face_subset, face_full_subset, HB_TAG ('v','m','t','x'));
61
62 hb_face_destroy (face_full_subset);
63 hb_face_destroy (face_full);
64 hb_face_destroy (face_subset);
65 }
66
67 static void
test_subset_vmtx_noop(void)68 test_subset_vmtx_noop (void)
69 {
70 hb_face_t *face_full = hb_test_open_font_file ("fonts/Mplus1p-Regular.660E,6975,73E0,5EA6,8F38,6E05.ttf");
71 hb_face_t *face_full_subset;
72
73 hb_set_t *codepoints = hb_set_create();
74 hb_set_add (codepoints, 0x660E);
75 hb_set_add (codepoints, 0x6975);
76 hb_set_add (codepoints, 0x73E0);
77 hb_set_add (codepoints, 0x5EA6);
78 hb_set_add (codepoints, 0x8F38);
79 hb_set_add (codepoints, 0x6E05);
80 face_full_subset = hb_subset_test_create_subset (face_full, hb_subset_test_create_input (codepoints));
81 hb_set_destroy (codepoints);
82
83 check_num_vmetrics(face_full_subset, 1); /* all have the same width */
84 hb_subset_test_check (face_full, face_full_subset, HB_TAG ('v','m','t','x'));
85
86 hb_face_destroy (face_full_subset);
87 hb_face_destroy (face_full);
88 }
89
90 int
main(int argc,char ** argv)91 main (int argc, char **argv)
92 {
93 hb_test_init (&argc, &argv);
94
95 hb_test_add (test_subset_vmtx_simple_subset);
96 hb_test_add (test_subset_vmtx_noop);
97
98 return hb_test_run();
99 }
100