--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/test-buffer-serialize.cc	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,95 @@
+/*
+ * Copyright © 2010,2011,2013  Google, 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.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#include "hb.hh"
+
+#include "hb.h"
+#include "hb-ot.h"
+#ifdef HAVE_FREETYPE
+#include "hb-ft.h"
+#endif
+
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file_or_fail(x)  hb_blob_get_empty ()
+#endif
+
+int
+main (int argc, char **argv)
+{
+  bool ret = true;
+
+#ifndef HB_NO_BUFFER_SERIALIZE
+
+  if (argc < 2)
+    argv[1] = (char *) "/dev/null";
+
+  hb_blob_t *blob = hb_blob_create_from_file_or_fail (argv[1]);
+  assert (blob);
+  hb_face_t *face = hb_face_create (blob, 0 /* first face */);
+  hb_blob_destroy (blob);
+  blob = nullptr;
+
+  unsigned int upem = hb_face_get_upem (face);
+  hb_font_t *font = hb_font_create (face);
+  hb_face_destroy (face);
+  hb_font_set_scale (font, upem, upem);
+  //hb_ot_font_set_funcs (font);
+#ifdef HAVE_FREETYPE
+  //hb_ft_font_set_funcs (font);
+#endif
+
+  hb_buffer_t *buf;
+  buf = hb_buffer_create ();
+
+  char line[BUFSIZ], out[BUFSIZ];
+  while (fgets (line, sizeof(line), stdin))
+  {
+    hb_buffer_clear_contents (buf);
+
+    const char *p = line;
+    while (hb_buffer_deserialize_glyphs (buf,
+					 p, -1, &p,
+					 font,
+					 HB_BUFFER_SERIALIZE_FORMAT_TEXT))
+      ;
+    if (*p && *p != '\n')
+      ret = false;
+
+    hb_buffer_serialize_glyphs (buf, 0, hb_buffer_get_length (buf),
+				out, sizeof (out), nullptr,
+				font, HB_BUFFER_SERIALIZE_FORMAT_TEXT,
+				HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS);
+    puts (out);
+  }
+
+  hb_buffer_destroy (buf);
+
+  hb_font_destroy (font);
+
+#endif
+
+  return !ret;
+}