kc3-lang/harfbuzz/test/api/test-font-scale.c

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• Hash : 8dc86d07
  Author :
  Date : 2021-11-01T19:57:11
  

  Add a test font scale rounding behavior
  
  This test verifies the fix for
  https://github.com/harfbuzz/harfbuzz/issues/3274
  

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• test/api/test-font-scale.c

• /*
   * Copyright 2021 Red Hat, 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.
   *
   * Author(s): Matthias Clasen
   */
  
  #include "hb-test.h"
  
  #include <hb.h>
  
  /* test for https://github.com/harfbuzz/harfbuzz/issues/3274 */
  
  static void
  test_hb_scale (void)
  {
    hb_face_t *face = hb_test_open_font_file ("fonts/Cantarell.A.otf");
    hb_font_t *font1 = hb_font_create (face);
    hb_font_t *font2 = hb_font_create (face);
  
    double scale = 64 * 1024 * 96./72.;
    hb_font_set_scale (font1, scale, scale);
    hb_font_set_scale (font2, - scale, - scale);
  
    g_assert_cmpint (hb_font_get_glyph_h_advance (font1, 1), ==, - hb_font_get_glyph_h_advance (font2, 1));
  
    hb_font_destroy (font1);
    hb_font_destroy (font2);
    hb_face_destroy (face);
  }
  
  int
  main (int argc, char **argv)
  {
    hb_test_init (&argc, &argv);
    hb_test_add (test_hb_scale);
    return hb_test_run ();
  }
  

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