1  /*
       2   * Copyright 2021 Red Hat, Inc
       3   *
       4   * This is part of HarfBuzz, a text shaping library.
       5   *
       6   * Permission is hereby granted, without written agreement and without
       7   * license or royalty fees, to use, copy, modify, and distribute this
       8   * software and its documentation for any purpose, provided that the
       9   * above copyright notice and the following two paragraphs appear in
      10   * all copies of this software.
      11   *
      12   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
      13   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
      14   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
      15   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
      16   * DAMAGE.
      17   *
      18   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
      19   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
      20   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
      21   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
      22   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
      23   *
      24   * Author(s): Matthias Clasen
      25   */
      26  
      27  #include "hb-test.h"
      28  
      29  #include <hb.h>
      30  
      31  /* test for https://github.com/harfbuzz/harfbuzz/issues/3274 */
      32  
      33  static void
      34  test_hb_scale (void)
      35  {
      36    hb_face_t *face = hb_test_open_font_file ("fonts/Cantarell.A.otf");
      37    hb_font_t *font1 = hb_font_create (face);
      38    hb_font_t *font2 = hb_font_create (face);
      39  
      40    double scale = 64 * 1024 * 96./72.;
      41    hb_font_set_scale (font1, scale, scale);
      42    hb_font_set_scale (font2, - scale, - scale);
      43  
      44    g_assert_cmpint (hb_font_get_glyph_h_advance (font1, 1), ==, - hb_font_get_glyph_h_advance (font2, 1));
      45  
      46    hb_font_destroy (font1);
      47    hb_font_destroy (font2);
      48    hb_face_destroy (face);
      49  }
      50  
      51  int
      52  main (int argc, char **argv)
      53  {
      54    hb_test_init (&argc, &argv);
      55    hb_test_add (test_hb_scale);
      56    return hb_test_run ();
      57  }