[test] hb_ot_layout_table_get_script_tags()

test/api/Makefile.am

@@ -46,6 +46,7 @@ TEST_PROGS = \
 	test-ot-face \
 	test-ot-glyphname \
 	test-ot-ligature-carets \
+	test-ot-layout \
 	test-ot-name \
 	test-ot-meta \
 	test-ot-metrics \

test/api/meson.build

@@ -21,6 +21,7 @@ tests = [
   'test-ot-color.c',
   'test-ot-face.c',
   'test-ot-glyphname.c',
+  'test-ot-layout.c',
   'test-ot-ligature-carets.c',
   'test-ot-name.c',
   'test-ot-meta.c',

test/api/test-ot-layout.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright © 2021  Khaled Hosny
+ *
+ *  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.
+ */
+
+#include "hb-test.h"
+
+#include <hb.h>
+#include <hb-ot.h>
+
+#define STATIC_ARRAY_SIZE 255
+
+static void
+test_ot_layout_table_get_script_tags (void)
+{
+  hb_face_t *face = hb_test_open_font_file ("fonts/NotoNastaliqUrdu-Regular.ttf");
+
+  unsigned int total = 0;
+  unsigned int count = STATIC_ARRAY_SIZE;
+  unsigned int offset = 0;
+  hb_tag_t tags[STATIC_ARRAY_SIZE];
+  while (count == STATIC_ARRAY_SIZE)
+  {
+    total = hb_ot_layout_table_get_script_tags (face, HB_OT_TAG_GSUB, offset, &count, tags);
+    g_assert_cmpuint (3, ==, total);
+    offset += count;
+    if (count)
+    {
+      g_assert_cmpuint (3, ==, count);
+      g_assert_cmpuint (HB_TAG ('a','r','a','b'), ==, tags[0]);
+      g_assert_cmpuint (HB_TAG ('d','f','l','t'), ==, tags[1]);
+      g_assert_cmpuint (HB_TAG ('l','a','t','n'), ==, tags[2]);
+    }
+  }
+  count = STATIC_ARRAY_SIZE;
+  offset = 0;
+  while (count == STATIC_ARRAY_SIZE)
+  {
+    total = hb_ot_layout_table_get_script_tags (face, HB_OT_TAG_GPOS, offset, &count, tags);
+    g_assert_cmpuint (1, ==, total);
+    offset += count;
+    if (count)
+    {
+      g_assert_cmpuint (1, ==, count);
+      g_assert_cmpuint (HB_TAG ('a','r','a','b'), ==, tags[0]);
+    }
+  }
+
+  hb_face_destroy (face);
+}
+
+int
+main (int argc, char **argv)
+{
+  hb_test_init (&argc, &argv);
+  hb_test_add (test_ot_layout_table_get_script_tags);
+  return hb_test_run ();
+}