--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/hb-cff1-interp-cs.hh	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,159 @@
+/*
+ * Copyright © 2018 Adobe 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.
+ *
+ * Adobe Author(s): Michiharu Ariza
+ */
+#ifndef HB_CFF1_INTERP_CS_HH
+#define HB_CFF1_INTERP_CS_HH
+
+#include "hb.hh"
+#include "hb-cff-interp-cs-common.hh"
+
+namespace CFF {
+
+using namespace OT;
+
+typedef biased_subrs_t<CFF1Subrs>   cff1_biased_subrs_t;
+
+struct cff1_cs_interp_env_t : cs_interp_env_t<number_t, CFF1Subrs>
+{
+  template <typename ACC>
+  cff1_cs_interp_env_t (const hb_ubytes_t &str, ACC &acc, unsigned int fd)
+    : SUPER (str, acc.globalSubrs, acc.privateDicts[fd].localSubrs)
+  {
+    processed_width = false;
+    has_width = false;
+    arg_start = 0;
+    in_seac = false;
+  }
+
+  void set_width (bool has_width_)
+  {
+    if (likely (!processed_width && (SUPER::argStack.get_count () > 0)))
+    {
+      if (has_width_)
+      {
+	width = SUPER::argStack[0];
+	has_width = true;
+	arg_start = 1;
+      }
+    }
+    processed_width = true;
+  }
+
+  void clear_args ()
+  {
+    arg_start = 0;
+    SUPER::clear_args ();
+  }
+
+  void set_in_seac (bool _in_seac) { in_seac = _in_seac; }
+
+  bool	  processed_width;
+  bool	  has_width;
+  unsigned int  arg_start;
+  number_t	width;
+  bool	  in_seac;
+
+  private:
+  typedef cs_interp_env_t<number_t, CFF1Subrs> SUPER;
+};
+
+template <typename OPSET, typename PARAM, typename PATH=path_procs_null_t<cff1_cs_interp_env_t, PARAM>>
+struct cff1_cs_opset_t : cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH>
+{
+  /* PostScript-originated legacy opcodes (OpCode_add etc) are unsupported */
+  /* Type 1-originated deprecated opcodes, seac behavior of endchar and dotsection are supported */
+
+  static void process_op (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param)
+  {
+    switch (op) {
+      case OpCode_dotsection:
+	SUPER::flush_args_and_op (op, env, param);
+	break;
+
+      case OpCode_endchar:
+	OPSET::check_width (op, env, param);
+	if (env.argStack.get_count () >= 4)
+	{
+	  OPSET::process_seac (env, param);
+	}
+	OPSET::flush_args_and_op (op, env, param);
+	env.set_endchar (true);
+	break;
+
+      default:
+	SUPER::process_op (op, env, param);
+    }
+  }
+
+  static void check_width (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param)
+  {
+    if (!env.processed_width)
+    {
+      bool  has_width = false;
+      switch (op)
+      {
+	case OpCode_endchar:
+	case OpCode_hstem:
+	case OpCode_hstemhm:
+	case OpCode_vstem:
+	case OpCode_vstemhm:
+	case OpCode_hintmask:
+	case OpCode_cntrmask:
+	  has_width = ((env.argStack.get_count () & 1) != 0);
+	  break;
+	case OpCode_hmoveto:
+	case OpCode_vmoveto:
+	  has_width = (env.argStack.get_count () > 1);
+	  break;
+	case OpCode_rmoveto:
+	  has_width = (env.argStack.get_count () > 2);
+	  break;
+	default:
+	  return;
+      }
+      env.set_width (has_width);
+    }
+  }
+
+  static void process_seac (cff1_cs_interp_env_t &env, PARAM& param)
+  {
+  }
+
+  static void flush_args (cff1_cs_interp_env_t &env, PARAM& param)
+  {
+    SUPER::flush_args (env, param);
+    env.clear_args ();  /* pop off width */
+  }
+
+  private:
+  typedef cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH>  SUPER;
+};
+
+template <typename OPSET, typename PARAM>
+using cff1_cs_interpreter_t = cs_interpreter_t<cff1_cs_interp_env_t, OPSET, PARAM>;
+
+} /* namespace CFF */
+
+#endif /* HB_CFF1_INTERP_CS_HH */