Edit
kc3-lang/harfbuzz/test/api/test-subset-hmtx.c
Garret Rieger
- test/api/test-subset-hmtx.c
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/* * Copyright © 2018 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): Roderick Sheeter */ #include "hb-test.h" #include "hb-subset-test.h" /* Unit tests for hmtx subsetting */ static void check_num_hmetrics(hb_face_t *face, uint16_t expected_num_hmetrics) { hb_blob_t *hhea_blob = hb_face_reference_table (face, HB_TAG ('h','h','e','a')); hb_blob_t *hmtx_blob = hb_face_reference_table (face, HB_TAG ('h','m','t','x')); // TODO I sure wish I could just use the hmtx table struct! unsigned int hhea_len; uint8_t *raw_hhea = (uint8_t *) hb_blob_get_data(hhea_blob, &hhea_len); uint16_t num_hmetrics = (raw_hhea[hhea_len - 2] << 8) + raw_hhea[hhea_len - 1]; g_assert_cmpuint(expected_num_hmetrics, ==, num_hmetrics); hb_blob_destroy (hhea_blob); hb_blob_destroy (hmtx_blob); } static void test_subset_hmtx_simple_subset (void) { hb_face_t *face_abc = hb_test_open_font_file ("fonts/Roboto-Regular.abc.ttf"); hb_face_t *face_ac = hb_test_open_font_file ("fonts/Roboto-Regular.ac.ttf"); hb_set_t *codepoints = hb_set_create (); hb_face_t *face_abc_subset; hb_set_add (codepoints, 'a'); hb_set_add (codepoints, 'c'); face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints)); hb_set_destroy (codepoints); check_num_hmetrics(face_abc_subset, 3); /* nothing has same width */ hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('h','m','t','x')); hb_face_destroy (face_abc_subset); hb_face_destroy (face_abc); hb_face_destroy (face_ac); } static void test_subset_hmtx_monospace (void) { hb_face_t *face_abc = hb_test_open_font_file ("fonts/Inconsolata-Regular.abc.ttf"); hb_face_t *face_ac = hb_test_open_font_file ("fonts/Inconsolata-Regular.ac.ttf"); hb_set_t *codepoints = hb_set_create (); hb_face_t *face_abc_subset; hb_set_add (codepoints, 'a'); hb_set_add (codepoints, 'c'); face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints)); hb_set_destroy (codepoints); check_num_hmetrics(face_abc_subset, 1); /* everything has same width */ hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('h','m','t','x')); hb_face_destroy (face_abc_subset); hb_face_destroy (face_abc); hb_face_destroy (face_ac); } static void test_subset_hmtx_keep_num_metrics (void) { hb_face_t *face_abc = hb_test_open_font_file ("fonts/Inconsolata-Regular.abc.widerc.ttf"); hb_face_t *face_ac = hb_test_open_font_file ("fonts/Inconsolata-Regular.ac.widerc.ttf"); hb_set_t *codepoints = hb_set_create (); hb_face_t *face_abc_subset; hb_set_add (codepoints, 'a'); hb_set_add (codepoints, 'c'); face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints)); hb_set_destroy (codepoints); check_num_hmetrics(face_abc_subset, 3); /* c is wider */ hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('h','m','t','x')); hb_face_destroy (face_abc_subset); hb_face_destroy (face_abc); hb_face_destroy (face_ac); } static void test_subset_hmtx_decrease_num_metrics (void) { hb_face_t *face_abc = hb_test_open_font_file ("fonts/Inconsolata-Regular.abc.widerc.ttf"); hb_face_t *face_ab = hb_test_open_font_file ("fonts/Inconsolata-Regular.ab.ttf"); hb_set_t *codepoints = hb_set_create (); hb_face_t *face_abc_subset; hb_set_add (codepoints, 'a'); hb_set_add (codepoints, 'b'); face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints)); hb_set_destroy (codepoints); check_num_hmetrics(face_abc_subset, 1); /* everything left has same width */ hb_subset_test_check (face_ab, face_abc_subset, HB_TAG ('h','m','t','x')); hb_face_destroy (face_abc_subset); hb_face_destroy (face_abc); hb_face_destroy (face_ab); } static void test_subset_hmtx_noop (void) { hb_face_t *face_abc = hb_test_open_font_file ("fonts/Roboto-Regular.abc.ttf"); hb_set_t *codepoints = hb_set_create(); hb_face_t *face_abc_subset; hb_set_add (codepoints, 'a'); hb_set_add (codepoints, 'b'); hb_set_add (codepoints, 'c'); face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints)); hb_set_destroy (codepoints); check_num_hmetrics(face_abc_subset, 4); /* nothing has same width */ hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('h','m','t','x')); hb_face_destroy (face_abc_subset); hb_face_destroy (face_abc); } static void test_subset_invalid_hmtx (void) { hb_face_t *face = hb_test_open_font_file ("../fuzzing/fonts/crash-e4e0bb1458a91b692eba492c907ae1f94e635480"); hb_face_t *subset; hb_subset_input_t *input = hb_subset_input_create_or_fail (); hb_set_t *codepoints = hb_subset_input_unicode_set (input); hb_set_add (codepoints, 'a'); hb_set_add (codepoints, 'b'); hb_set_add (codepoints, 'c'); subset = hb_subset_or_fail (face, input); g_assert (!subset); hb_subset_input_destroy (input); hb_face_destroy (subset); hb_face_destroy (face); } int main (int argc, char **argv) { hb_test_init (&argc, &argv); hb_test_add (test_subset_hmtx_simple_subset); hb_test_add (test_subset_hmtx_monospace); hb_test_add (test_subset_hmtx_keep_num_metrics); hb_test_add (test_subset_hmtx_decrease_num_metrics); hb_test_add (test_subset_hmtx_noop); hb_test_add (test_subset_invalid_hmtx); return hb_test_run(); }