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

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• Hash : d1b12a54
  Author :
  Date : 2019-05-20T21:29:54
  

  Merge branch 'master' of https://github.com/harfbuzz/harfbuzz into glyf
  

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• test/api/test-subset-glyf.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): Garret Rieger
   */
  
  #include "hb-test.h"
  #include "hb-subset-test.h"
  
  /* Unit tests for hb-subset-glyf.h */
  
  static void check_maxp_field (uint8_t *raw_maxp, unsigned int offset, uint16_t expected_value)
  {
    uint16_t actual_value = (raw_maxp[offset] << 8) + raw_maxp[offset + 1];
    g_assert_cmpuint(expected_value, ==, actual_value);
  }
  
  static void check_maxp_num_glyphs (hb_face_t *face, uint16_t expected_num_glyphs, bool hints)
  {
    hb_blob_t *maxp_blob = hb_face_reference_table (face, HB_TAG ('m','a','x', 'p'));
  
    unsigned int maxp_len;
    uint8_t *raw_maxp = (uint8_t *) hb_blob_get_data(maxp_blob, &maxp_len);
  
    check_maxp_field (raw_maxp, 4, expected_num_glyphs); // numGlyphs
    if (!hints)
    {
      check_maxp_field (raw_maxp, 14, 1); // maxZones
      check_maxp_field (raw_maxp, 16, 0); // maxTwilightPoints
      check_maxp_field (raw_maxp, 18, 0); // maxStorage
      check_maxp_field (raw_maxp, 20, 0); // maxFunctionDefs
      check_maxp_field (raw_maxp, 22, 0); // maxInstructionDefs
      check_maxp_field (raw_maxp, 24, 0); // maxStackElements
      check_maxp_field (raw_maxp, 26, 0); // maxSizeOfInstructions
    }
  
    hb_blob_destroy (maxp_blob);
  }
  
  static void
  test_subset_glyf (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, 97);
    hb_set_add (codepoints, 99);
    face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
    hb_set_destroy (codepoints);
  
    check_maxp_num_glyphs(face_abc_subset, 3, true);
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_glyf_with_input_glyphs (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 *glyphs = hb_set_create();
    hb_face_t *face_abc_subset;
    hb_set_add (glyphs, 1);
    hb_set_add (glyphs, 3);
    face_abc_subset =
        hb_subset_test_create_subset (face_abc, hb_subset_test_create_input_from_glyphs (glyphs));
    hb_set_destroy (glyphs);
  
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
    check_maxp_num_glyphs(face_abc_subset, 3, true);
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_glyf_with_components (void)
  {
    hb_face_t *face_components = hb_test_open_font_file ("fonts/Roboto-Regular.components.ttf");
    hb_face_t *face_subset = hb_test_open_font_file ("fonts/Roboto-Regular.components.subset.ttf");
  
    hb_set_t *codepoints = hb_set_create();
    hb_face_t *face_generated_subset;
    hb_set_add (codepoints, 0x1fc);
    face_generated_subset = hb_subset_test_create_subset (face_components, hb_subset_test_create_input (codepoints));
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f'));
    hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a'));
    check_maxp_num_glyphs(face_generated_subset, 4, true);
  
    hb_face_destroy (face_generated_subset);
    hb_face_destroy (face_subset);
    hb_face_destroy (face_components);
  }
  
  static void
  test_subset_glyf_with_gsub (void)
  {
    hb_face_t *face_fil = hb_test_open_font_file ("fonts/Roboto-Regular.gsub.fil.ttf");
    hb_face_t *face_fi = hb_test_open_font_file ("fonts/Roboto-Regular.gsub.fi.ttf");
    hb_subset_input_t *input;
    hb_face_t *face_subset;
  
    hb_set_t *codepoints = hb_set_create();
    hb_set_add (codepoints, 102); // f
    hb_set_add (codepoints, 105); // i
  
    input = hb_subset_test_create_input (codepoints);
    hb_set_destroy (codepoints);
    hb_set_del (hb_subset_input_drop_tables_set (input), HB_TAG('G', 'S', 'U', 'B'));
    hb_set_del (hb_subset_input_drop_tables_set (input), HB_TAG('G', 'P', 'O', 'S'));
    hb_set_del (hb_subset_input_drop_tables_set (input), HB_TAG('G', 'D', 'E', 'F'));
  
    face_subset = hb_subset_test_create_subset (face_fil, input);
  
    hb_subset_test_check (face_fi, face_subset, HB_TAG ('g','l','y','f'));
    hb_subset_test_check (face_fi, face_subset, HB_TAG ('l','o','c', 'a'));
    check_maxp_num_glyphs(face_subset, 5, true);
  
    hb_face_destroy (face_subset);
    hb_face_destroy (face_fi);
    hb_face_destroy (face_fil);
  }
  
  static void
  test_subset_glyf_without_gsub (void)
  {
    hb_face_t *face_fil = hb_test_open_font_file ("fonts/Roboto-Regular.gsub.fil.ttf");
    hb_face_t *face_fi = hb_test_open_font_file ("fonts/Roboto-Regular.nogsub.fi.ttf");
    hb_subset_input_t *input;
    hb_face_t *face_subset;
  
    hb_set_t *codepoints = hb_set_create();
    hb_set_add (codepoints, 102); // f
    hb_set_add (codepoints, 105); // i
  
    input = hb_subset_test_create_input (codepoints);
    hb_set_destroy (codepoints);
    hb_set_add (hb_subset_input_drop_tables_set (input), HB_TAG('G', 'S', 'U', 'B'));
    hb_set_add (hb_subset_input_drop_tables_set (input), HB_TAG('G', 'P', 'O', 'S'));
    hb_set_add (hb_subset_input_drop_tables_set (input), HB_TAG('G', 'D', 'E', 'F'));
  
    face_subset = hb_subset_test_create_subset (face_fil, input);
  
    hb_subset_test_check (face_fi, face_subset, HB_TAG ('g','l','y','f'));
    hb_subset_test_check (face_fi, face_subset, HB_TAG ('l','o','c', 'a'));
    check_maxp_num_glyphs(face_subset, 3, true);
  
    hb_face_destroy (face_subset);
    hb_face_destroy (face_fi);
    hb_face_destroy (face_fil);
  }
  
  static void
  test_subset_glyf_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, 97);
    hb_set_add (codepoints, 98);
    hb_set_add (codepoints, 99);
    face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
    hb_set_destroy (codepoints);
  
    check_maxp_num_glyphs(face_abc_subset, 4, true);
    hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('l','o','c', 'a'));
    hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('g','l','y','f'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
  }
  
  static void
  test_subset_glyf_strip_hints_simple (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.nohints.ttf");
  
    hb_set_t *codepoints = hb_set_create();
    hb_subset_input_t *input;
    hb_face_t *face_abc_subset;
    hb_set_add (codepoints, 'a');
    hb_set_add (codepoints, 'c');
    input = hb_subset_test_create_input (codepoints);
    hb_subset_input_set_drop_hints (input, true);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    check_maxp_num_glyphs(face_abc_subset, 3, false);
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_glyf_strip_hints_composite (void)
  {
    hb_face_t *face_components = hb_test_open_font_file ("fonts/Roboto-Regular.components.ttf");
    hb_face_t *face_subset = hb_test_open_font_file ("fonts/Roboto-Regular.components.1fc.nohints.ttf");
  
    hb_set_t *codepoints = hb_set_create();
    hb_subset_input_t *input;
    hb_face_t *face_generated_subset;
    hb_set_add (codepoints, 0x1fc);
    input = hb_subset_test_create_input (codepoints);
    hb_subset_input_set_drop_hints (input, true);
  
    face_generated_subset = hb_subset_test_create_subset (face_components, input);
    hb_set_destroy (codepoints);
  
    check_maxp_num_glyphs(face_generated_subset, 4, false);
    hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a'));
    hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f'));
  
    hb_face_destroy (face_generated_subset);
    hb_face_destroy (face_subset);
    hb_face_destroy (face_components);
  }
  
  static void
  test_subset_glyf_strip_hints_invalid (void)
  {
    hb_face_t *face = hb_test_open_font_file ("../fuzzing/fonts/oom-ccc61c92d589f895174cdef6ff2e3b20e9999a1a");
  
    hb_set_t *codepoints = hb_set_create();
    const hb_codepoint_t text[] =
    {
      'A', 'B', 'C', 'D', 'E', 'X', 'Y', 'Z', '1', '2',
      '3', '@', '_', '%', '&', ')', '*', '$', '!'
    };
    unsigned int i;
    hb_subset_input_t *input;
    hb_face_t *face_subset;
  
    for (i = 0; i < sizeof (text) / sizeof (hb_codepoint_t); i++)
    {
      hb_set_add (codepoints, text[i]);
    }
  
    input = hb_subset_test_create_input (codepoints);
    hb_subset_input_set_drop_hints (input, true);
    hb_set_destroy (codepoints);
  
    face_subset = hb_subset_test_create_subset (face, input);
    g_assert (face_subset);
    g_assert (face_subset == hb_face_get_empty ());
  
    hb_face_destroy (face_subset);
    hb_face_destroy (face);
  }
  
  static void
  test_subset_glyf_retain_gids (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.retaingids.ttf");
  
    hb_set_t *codepoints = hb_set_create();
    hb_face_t *face_abc_subset;
    hb_set_add (codepoints, 97);
    hb_set_add (codepoints, 99);
  
    hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
    hb_subset_input_set_retain_gids (input, true);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    check_maxp_num_glyphs(face_abc_subset, 4, true);
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_glyf_retain_gids_truncates (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file ("fonts/Roboto-Regular.abc.ttf");
    hb_face_t *face_a = hb_test_open_font_file ("fonts/Roboto-Regular.a.retaingids.ttf");
  
    hb_set_t *codepoints = hb_set_create();
    hb_face_t *face_abc_subset;
    hb_set_add (codepoints, 97);
  
    hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
    hb_subset_input_set_retain_gids (input, true);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    check_maxp_num_glyphs(face_abc_subset, 2, true);
    hb_subset_test_check (face_a, face_abc_subset, HB_TAG ('l','o','c', 'a'));
    hb_subset_test_check (face_a, face_abc_subset, HB_TAG ('g','l','y','f'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_a);
  }
  
  // TODO(grieger): test for long loca generation.
  
  int
  main (int argc, char **argv)
  {
    hb_test_init (&argc, &argv);
  
    hb_test_add (test_subset_glyf_noop);
    hb_test_add (test_subset_glyf);
    hb_test_add (test_subset_glyf_with_input_glyphs);
    hb_test_add (test_subset_glyf_strip_hints_simple);
    hb_test_add (test_subset_glyf_strip_hints_composite);
    hb_test_add (test_subset_glyf_strip_hints_invalid);
    hb_test_add (test_subset_glyf_with_components);
    hb_test_add (test_subset_glyf_with_gsub);
    hb_test_add (test_subset_glyf_without_gsub);
    hb_test_add (test_subset_glyf_retain_gids);
    hb_test_add (test_subset_glyf_retain_gids_truncates);
  
    return hb_test_run();
  }
  

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