Add a test font scale rounding behavior

This test verifies the fix for
https://github.com/harfbuzz/harfbuzz/issues/3274
This commit is contained in:
Matthias Clasen 2021-11-01 19:57:11 -04:00 committed by Behdad Esfahbod
parent c484641304
commit 8dc86d0703
4 changed files with 59 additions and 0 deletions

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@ -38,6 +38,7 @@ TEST_PROGS = \
test-common \ test-common \
test-draw \ test-draw \
test-font \ test-font \
test-font-scale \
test-map \ test-map \
test-object \ test-object \
test-ot-alternates \ test-ot-alternates \

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@ -14,6 +14,7 @@ tests = [
'test-common.c', 'test-common.c',
'test-draw.c', 'test-draw.c',
'test-font.c', 'test-font.c',
'test-font-scale.c',
'test-map.c', 'test-map.c',
'test-object.c', 'test-object.c',
'test-ot-alternates.c', 'test-ot-alternates.c',

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@ -0,0 +1,57 @@
/*
* 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 ();
}