Add a test for glyph extents

This verifies a recent fix for COLRv1 returning
0,0,-1,1 for extents of non-painting glyphs.
This commit is contained in:
Matthias Clasen 2023-01-24 19:26:20 -05:00 committed by Behdad Esfahbod
parent 73e6f6cc88
commit dd64266ea4
4 changed files with 106 additions and 0 deletions

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@ -42,6 +42,7 @@ TEST_PROGS = \
test-cplusplus \
test-common \
test-draw \
test-extents \
test-font \
test-font-scale \
test-instance-cff2 \

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test/api/fonts/adwaita.ttf Normal file

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@ -15,6 +15,7 @@ tests = [
'test-cplusplus.cc',
'test-common.c',
'test-draw.c',
'test-extents.c',
'test-font.c',
'test-font-scale.c',
'test-instance-cff2.c',

104
test/api/test-extents.c Normal file
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@ -0,0 +1,104 @@
/*
* Copyright © 2023 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"
static void
test_glyph_extents (void)
{
hb_face_t *face;
hb_font_t *font;
hb_glyph_extents_t extents;
hb_bool_t ret;
/* This font contains a COLRv1 glyph with a ClipBox,
* and various components without. The main thing
* we test here is that glyphs with no paint return
* 0,0,0,0 and not meaningless numbers.
*/
face = hb_test_open_font_file ("fonts/adwaita.ttf");
font = hb_font_create (face);
ret = hb_font_get_glyph_extents (font, 0, &extents);
g_assert_true (ret);
g_assert_true (extents.x_bearing == 0 &&
extents.y_bearing == 0 &&
extents.width == 0 &&
extents.height == 0);
ret = hb_font_get_glyph_extents (font, 1, &extents);
g_assert_true (ret);
g_assert_true (extents.x_bearing == 0 &&
extents.y_bearing == 0 &&
extents.width == 0 &&
extents.height == 0);
ret = hb_font_get_glyph_extents (font, 2, &extents);
g_assert_true (ret);
g_assert_true (extents.x_bearing == 180 &&
extents.y_bearing == 960 &&
extents.width == 1060 &&
extents.height == -1220);
ret = hb_font_get_glyph_extents (font, 3, &extents);
g_assert_true (ret);
g_assert_true (extents.x_bearing == 188 &&
extents.y_bearing == 950 &&
extents.width == 900 &&
extents.height == -1200);
ret = hb_font_get_glyph_extents (font, 4, &extents);
g_assert_true (ret);
g_assert_true (extents.x_bearing == 413 &&
extents.y_bearing == 50 &&
extents.width == 150 &&
extents.height == -75);
ret = hb_font_get_glyph_extents (font, 5, &extents);
g_assert_true (ret);
g_assert_true (extents.x_bearing == 638 &&
extents.y_bearing == 350 &&
extents.width == 600 &&
extents.height == -600);
ret = hb_font_get_glyph_extents (font, 1000, &extents);
g_assert_false (ret);
hb_font_destroy (font);
hb_face_destroy (face);
}
int
main (int argc, char **argv)
{
hb_test_init (&argc, &argv);
hb_test_add (test_glyph_extents);
return hb_test_run();
}