2 * Copyright © 2018 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
24 * Google Author(s): Garret Rieger
28 #include "hb-subset-test.h"
30 /* Unit tests for hb-subset-glyf.h */
32 static void check_maxp_field (uint8_t *raw_maxp, unsigned int offset, uint16_t expected_value)
34 uint16_t actual_value = (raw_maxp[offset] << 8) + raw_maxp[offset + 1];
35 g_assert_cmpuint(expected_value, ==, actual_value);
38 static void check_maxp_num_glyphs (hb_face_t *face, uint16_t expected_num_glyphs, bool hints)
40 hb_blob_t *maxp_blob = hb_face_reference_table (face, HB_TAG ('m','a','x', 'p'));
42 unsigned int maxp_len;
43 uint8_t *raw_maxp = (uint8_t *) hb_blob_get_data(maxp_blob, &maxp_len);
45 check_maxp_field (raw_maxp, 4, expected_num_glyphs); // numGlyphs
48 check_maxp_field (raw_maxp, 14, 1); // maxZones
49 check_maxp_field (raw_maxp, 16, 0); // maxTwilightPoints
50 check_maxp_field (raw_maxp, 18, 0); // maxStorage
51 check_maxp_field (raw_maxp, 20, 0); // maxFunctionDefs
52 check_maxp_field (raw_maxp, 22, 0); // maxInstructionDefs
53 check_maxp_field (raw_maxp, 24, 0); // maxStackElements
54 check_maxp_field (raw_maxp, 26, 0); // maxSizeOfInstructions
57 hb_blob_destroy (maxp_blob);
61 test_subset_glyf (void)
63 hb_face_t *face_abc = hb_subset_test_open_font ("fonts/Roboto-Regular.abc.ttf");
64 hb_face_t *face_ac = hb_subset_test_open_font ("fonts/Roboto-Regular.ac.ttf");
66 hb_set_t *codepoints = hb_set_create();
67 hb_face_t *face_abc_subset;
68 hb_set_add (codepoints, 97);
69 hb_set_add (codepoints, 99);
70 face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
71 hb_set_destroy (codepoints);
73 hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
74 hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
75 check_maxp_num_glyphs(face_abc_subset, 3, true);
77 hb_face_destroy (face_abc_subset);
78 hb_face_destroy (face_abc);
79 hb_face_destroy (face_ac);
83 test_subset_glyf_with_components (void)
85 hb_face_t *face_components = hb_subset_test_open_font ("fonts/Roboto-Regular.components.ttf");
86 hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.subset.ttf");
88 hb_set_t *codepoints = hb_set_create();
89 hb_face_t *face_generated_subset;
90 hb_set_add (codepoints, 0x1fc);
91 face_generated_subset = hb_subset_test_create_subset (face_components, hb_subset_test_create_input (codepoints));
92 hb_set_destroy (codepoints);
94 hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f'));
95 hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a'));
96 check_maxp_num_glyphs(face_generated_subset, 4, true);
98 hb_face_destroy (face_generated_subset);
99 hb_face_destroy (face_subset);
100 hb_face_destroy (face_components);
104 test_subset_glyf_with_gsub (void)
106 hb_face_t *face_fil = hb_subset_test_open_font ("fonts/Roboto-Regular.gsub.fil.ttf");
107 hb_face_t *face_fi = hb_subset_test_open_font ("fonts/Roboto-Regular.gsub.fi.ttf");
109 hb_set_t *codepoints = hb_set_create();
110 hb_set_add (codepoints, 102); // f
111 hb_set_add (codepoints, 105); // i
113 hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
114 hb_set_destroy (codepoints);
115 *hb_subset_input_drop_ot_layout (input) = false;
117 hb_face_t *face_subset = hb_subset_test_create_subset (face_fil, input);
119 hb_subset_test_check (face_fi, face_subset, HB_TAG ('g','l','y','f'));
120 hb_subset_test_check (face_fi, face_subset, HB_TAG ('l','o','c', 'a'));
121 check_maxp_num_glyphs(face_subset, 5, true);
123 hb_face_destroy (face_subset);
124 hb_face_destroy (face_fi);
125 hb_face_destroy (face_fil);
129 test_subset_glyf_without_gsub (void)
131 hb_face_t *face_fil = hb_subset_test_open_font ("fonts/Roboto-Regular.gsub.fil.ttf");
132 hb_face_t *face_fi = hb_subset_test_open_font ("fonts/Roboto-Regular.nogsub.fi.ttf");
134 hb_set_t *codepoints = hb_set_create();
135 hb_set_add (codepoints, 102); // f
136 hb_set_add (codepoints, 105); // i
138 hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
139 hb_set_destroy (codepoints);
140 *hb_subset_input_drop_ot_layout (input) = true;
142 hb_face_t *face_subset = hb_subset_test_create_subset (face_fil, input);
144 hb_subset_test_check (face_fi, face_subset, HB_TAG ('g','l','y','f'));
145 hb_subset_test_check (face_fi, face_subset, HB_TAG ('l','o','c', 'a'));
146 check_maxp_num_glyphs(face_subset, 3, true);
148 hb_face_destroy (face_subset);
149 hb_face_destroy (face_fi);
150 hb_face_destroy (face_fil);
154 test_subset_glyf_noop (void)
156 hb_face_t *face_abc = hb_subset_test_open_font("fonts/Roboto-Regular.abc.ttf");
158 hb_set_t *codepoints = hb_set_create();
159 hb_face_t *face_abc_subset;
160 hb_set_add (codepoints, 97);
161 hb_set_add (codepoints, 98);
162 hb_set_add (codepoints, 99);
163 face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
164 hb_set_destroy (codepoints);
166 hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('g','l','y','f'));
167 hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('l','o','c', 'a'));
168 check_maxp_num_glyphs(face_abc_subset, 4, true);
170 hb_face_destroy (face_abc_subset);
171 hb_face_destroy (face_abc);
175 test_subset_glyf_strip_hints_simple (void)
177 hb_face_t *face_abc = hb_subset_test_open_font ("fonts/Roboto-Regular.abc.ttf");
178 hb_face_t *face_ac = hb_subset_test_open_font ("fonts/Roboto-Regular.ac.nohints.ttf");
180 hb_set_t *codepoints = hb_set_create();
181 hb_subset_input_t *input;
182 hb_face_t *face_abc_subset;
183 hb_set_add (codepoints, 'a');
184 hb_set_add (codepoints, 'c');
185 input = hb_subset_test_create_input (codepoints);
186 *hb_subset_input_drop_hints(input) = true;
187 face_abc_subset = hb_subset_test_create_subset (face_abc, input);
188 hb_set_destroy (codepoints);
190 hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
191 hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
192 check_maxp_num_glyphs(face_abc_subset, 3, false);
194 hb_face_destroy (face_abc_subset);
195 hb_face_destroy (face_abc);
196 hb_face_destroy (face_ac);
200 test_subset_glyf_strip_hints_composite (void)
202 hb_face_t *face_components = hb_subset_test_open_font ("fonts/Roboto-Regular.components.ttf");
203 hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.1fc.nohints.ttf");
205 hb_set_t *codepoints = hb_set_create();
206 hb_subset_input_t *input;
207 hb_face_t *face_generated_subset;
208 hb_set_add (codepoints, 0x1fc);
209 input = hb_subset_test_create_input (codepoints);
210 *hb_subset_input_drop_hints(input) = true;
212 face_generated_subset = hb_subset_test_create_subset (face_components, input);
213 hb_set_destroy (codepoints);
215 hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f'));
216 hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a'));
217 check_maxp_num_glyphs(face_generated_subset, 4, false);
219 hb_face_destroy (face_generated_subset);
220 hb_face_destroy (face_subset);
221 hb_face_destroy (face_components);
225 test_subset_glyf_strip_hints_invalid (void)
227 hb_face_t *face = hb_subset_test_open_font ("fonts/oom-ccc61c92d589f895174cdef6ff2e3b20e9999a1a");
229 hb_set_t *codepoints = hb_set_create();
230 const hb_codepoint_t text[] =
232 'A', 'B', 'C', 'D', 'E', 'X', 'Y', 'Z', '1', '2',
233 '3', '@', '_', '%', '&', ')', '*', '$', '!'
236 for (i = 0; i < sizeof (text) / sizeof (hb_codepoint_t); i++)
238 hb_set_add (codepoints, text[i]);
241 hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
242 *hb_subset_input_drop_hints(input) = true;
243 hb_set_destroy (codepoints);
245 hb_face_t *face_subset = hb_subset_test_create_subset (face, input);
246 g_assert (face_subset);
247 g_assert (face_subset == hb_face_get_empty ());
249 hb_face_destroy (face_subset);
250 hb_face_destroy (face);
253 // TODO(grieger): test for long loca generation.
256 main (int argc, char **argv)
258 hb_test_init (&argc, &argv);
260 hb_test_add (test_subset_glyf_noop);
261 hb_test_add (test_subset_glyf);
262 hb_test_add (test_subset_glyf_strip_hints_simple);
263 hb_test_add (test_subset_glyf_strip_hints_composite);
264 hb_test_add (test_subset_glyf_strip_hints_invalid);
265 hb_test_add (test_subset_glyf_with_components);
266 hb_test_add (test_subset_glyf_with_gsub);
267 hb_test_add (test_subset_glyf_without_gsub);
269 return hb_test_run();