kc3-lang/harfbuzz/test/api/test-baseline.c

• Show log

  Commit

• Hash : f81578fd
  Author :
  Date : 2022-02-13T19:15:36
  

  [ot-layout] Synthesize missing baselines
  
  Add a variation of hb_ot_layout_get_baseline that
  synthesizes missing baselines, using heuristics in part
  taken from the CSS Inline Layout Module, Level 3.
  
  Includes some new tests for synthesized baselines.
  The base2.ttf is a subset of Noto Sans Bengali that
  includes just the Bengali Ka.
  
  New API: hb_ot_layout_get_baseline_with_fallback
  

Download

• test/api/test-baseline.c

• /*
   * Copyright © 2018  Ebrahim Byagowi
   *
   *  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.
   */
  
  #include "hb-test.h"
  
  #include <hb-ot.h>
  
  /* Unit tests for hb-ot-layout.h baseline */
  
  static void
  test_ot_layout_base (void)
  {
    hb_face_t *face = hb_test_open_font_file ("fonts/base.ttf");
    hb_font_t *font = hb_font_create (face);
  
    hb_position_t position;
    g_assert (hb_ot_layout_get_baseline (font, HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_BOTTOM_OR_LEFT, HB_DIRECTION_TTB,
  				       HB_TAG ('h','a','n','i'),
  				       HB_TAG ('E','N','G',' '),
  				       &position));
    g_assert_cmpint (46, ==, position);
  
    g_assert (!hb_ot_layout_get_baseline (font, HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT, HB_DIRECTION_TTB,
  				        HB_TAG ('h','a','n','i'),
  				        HB_TAG ('E','N','G',' '),
  				        &position));
  
    hb_font_destroy (font);
    hb_face_destroy (face);
  }
  
  static void
  test_ot_layout_base_with_fallback (void)
  {
    hb_face_t *face = hb_test_open_font_file ("fonts/base.ttf");
    hb_font_t *font = hb_font_create (face);
  
    hb_position_t position;
    hb_ot_layout_get_baseline_with_fallback (font, HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_BOTTOM_OR_LEFT, HB_DIRECTION_TTB,
  					   HB_TAG ('h','a','n','i'),
  					   HB_TAG ('E','N','G',' '),
  					   &position);
    g_assert_cmpint (46, ==, position);
  
    hb_ot_layout_get_baseline_with_fallback (font, HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT, HB_DIRECTION_TTB,
  					   HB_TAG ('h','a','n','i'),
  					   HB_TAG ('E','N','G',' '),
  					   &position);
    g_assert_cmpint (1000, ==, position);
  
    hb_ot_layout_get_baseline_with_fallback (font, HB_OT_LAYOUT_BASELINE_TAG_MATH, HB_DIRECTION_LTR,
  					   HB_TAG ('h','a','n','i'),
  					   HB_TAG ('E','N','G',' '),
  					   &position);
    g_assert_cmpint (271, ==, position);
  
    hb_font_destroy (font);
    hb_face_destroy (face);
  
    face = hb_test_open_font_file ("fonts/base2.ttf");
    font = hb_font_create (face);
  
    hb_ot_layout_get_baseline_with_fallback (font, HB_OT_LAYOUT_BASELINE_TAG_HANGING, HB_DIRECTION_LTR,
  					   HB_SCRIPT_BENGALI,
  					   HB_TAG ('E','N','G',' '),
  					   &position);
    g_assert_cmpint (622, ==, position);
  
    hb_ot_layout_get_baseline_with_fallback (font, HB_OT_LAYOUT_BASELINE_TAG_HANGING, HB_DIRECTION_LTR,
  					   HB_SCRIPT_TIBETAN,
  					   HB_TAG ('E','N','G',' '),
  					   &position);
    g_assert_cmpint (600, ==, position);
  
    hb_font_destroy (font);
    hb_face_destroy (face);
  }
  
  int
  main (int argc, char **argv)
  {
    hb_test_init (&argc, &argv);
  
    hb_test_add (test_ot_layout_base);
    hb_test_add (test_ot_layout_base_with_fallback);
  
    return hb_test_run();
  }
  

Download