kc3-lang/harfbuzz/test/api/test-subset-hmtx.c

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• Hash : 9ab751ac
  Author :
  Date : 2021-06-23T13:38:47
  

  [subset] Remove hb_subset(). Leaving just hb_subset_or_fail().
  

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• test/api/test-subset-hmtx.c

• /*
   * 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();
  }
  

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