Add a test for glyph extents
This verifies a recent fix for COLRv1 returning
0,0,-1,1 for extents of non-painting glyphs.
diff --git a/test/api/Makefile.am b/test/api/Makefile.am
index 7d738c6..c021eca 100644
--- a/test/api/Makefile.am
+++ b/test/api/Makefile.am
@@ -42,6 +42,7 @@
test-cplusplus \
test-common \
test-draw \
+ test-extents \
test-font \
test-font-scale \
test-instance-cff2 \
diff --git a/test/api/fonts/adwaita.ttf b/test/api/fonts/adwaita.ttf
new file mode 100644
index 0000000..6415611
--- /dev/null
+++ b/test/api/fonts/adwaita.ttf
Binary files differ
diff --git a/test/api/meson.build b/test/api/meson.build
index a128e64..dd23fc7 100644
--- a/test/api/meson.build
+++ b/test/api/meson.build
@@ -15,6 +15,7 @@
'test-cplusplus.cc',
'test-common.c',
'test-draw.c',
+ 'test-extents.c',
'test-font.c',
'test-font-scale.c',
'test-instance-cff2.c',
diff --git a/test/api/test-extents.c b/test/api/test-extents.c
new file mode 100644
index 0000000..8600751
--- /dev/null
+++ b/test/api/test-extents.c
@@ -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();
+}
