kc3-lang/harfbuzz/test/api/test-subset-cff2.c

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• Hash : c6884377
  Author :
  Date : 2023-11-06T20:21:46
  

  [subset] Add HB_SUBSET_FLAGS_IFTB_REQUIREMENTS flag.
  
  When enabled the output subset conforms to the requirements for a base font to be patched by IFTB patches. IFTB is a proposed incremental font transfer patch. This new flag is set as experimental. Currently, setting this flag causes the output subset to also use long offsets for outline data in loca/glyf, gvar, CFF, and CFF2.
  
  This change is a version of https://github.com/skef/harfbuzz/commit/3ae2fe2084d96f61d8ad1bbe42a6ef4e62ec830a rebased onto head w/ tests added.
  

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• test/api/test-subset-cff2.c

• /*
   * Copyright © 2018 Adobe 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.
   *
   * Adobe Author(s): Michiharu Ariza
   */
  
  #include "hb-test.h"
  #include "hb-subset-test.h"
  
  /* Unit tests for CFF2 subsetting */
  
  static void
  test_subset_cff2_noop (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file("fonts/AdobeVFPrototype.abc.otf");
  
    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);
  
    hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('C','F','F','2'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
  }
  
  static void
  test_subset_cff2 (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file ("fonts/AdobeVFPrototype.abc.otf");
    hb_face_t *face_ac = hb_test_open_font_file ("fonts/AdobeVFPrototype.ac.otf");
  
    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);
  
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('C','F','F','2'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_cff2_strip_hints (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file ("fonts/AdobeVFPrototype.abc.otf");
    hb_face_t *face_ac = hb_test_open_font_file ("fonts/AdobeVFPrototype.ac.nohints.otf");
  
    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_flags (input, HB_SUBSET_FLAGS_NO_HINTING);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('C', 'F', 'F', '2'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_cff2_desubr (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file ("fonts/AdobeVFPrototype.abc.otf");
    hb_face_t *face_ac = hb_test_open_font_file ("fonts/AdobeVFPrototype.ac.nosubrs.otf");
  
    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_flags (input, HB_SUBSET_FLAGS_DESUBROUTINIZE);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('C', 'F', 'F', '2'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_cff2_desubr_strip_hints (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file ("fonts/AdobeVFPrototype.abc.otf");
    hb_face_t *face_ac = hb_test_open_font_file ("fonts/AdobeVFPrototype.ac.nosubrs.nohints.otf");
  
    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_flags (input,
                               HB_SUBSET_FLAGS_DESUBROUTINIZE | HB_SUBSET_FLAGS_NO_HINTING);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('C', 'F', 'F', '2'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_cff2_retaingids (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file ("fonts/AdobeVFPrototype.abc.otf");
    hb_face_t *face_ac = hb_test_open_font_file ("fonts/AdobeVFPrototype.ac.retaingids.otf");
  
    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_flags (input, HB_SUBSET_FLAGS_RETAIN_GIDS);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('C', 'F', 'F', '2'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  #ifdef HB_EXPERIMENTAL_API
  static void
  test_subset_cff2_iftb_requirements (void)
  {
    hb_face_t *face_abc = hb_test_open_font_file ("fonts/AdobeVFPrototype.abc.otf");
    hb_face_t *face_long_off = hb_test_open_font_file ("fonts/AdobeVFPrototype.abc.long_off.otf");
  
    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);
  
    hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
    hb_subset_input_set_flags (input, HB_SUBSET_FLAGS_IFTB_REQUIREMENTS);
    face_abc_subset = hb_subset_test_create_subset (face_abc, input);
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_long_off, face_abc_subset, HB_TAG ('C','F','F', '2'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_long_off);
  
  }
  #endif
  
  int
  main (int argc, char **argv)
  {
    hb_test_init (&argc, &argv);
  
    hb_test_add (test_subset_cff2_noop);
    hb_test_add (test_subset_cff2);
    hb_test_add (test_subset_cff2_strip_hints);
    hb_test_add (test_subset_cff2_desubr);
    hb_test_add (test_subset_cff2_desubr_strip_hints);
    hb_test_add (test_subset_cff2_retaingids);
  
  #ifdef HB_EXPERIMENTAL_API
    hb_test_add (test_subset_cff2_iftb_requirements);
  #endif
  
    return hb_test_run ();
  }
  

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