161 lines
4.2 KiB
C++
161 lines
4.2 KiB
C++
/*
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* Copyright © 2018 Adobe Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Adobe Author(s): Michiharu Ariza
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*/
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#ifndef HB_CFF1_INTERP_CS_HH
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#define HB_CFF1_INTERP_CS_HH
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#include "hb.hh"
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#include "hb-cff-interp-cs-common.hh"
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namespace CFF {
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using namespace OT;
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typedef biased_subrs_t<CFF1Subrs> cff1_biased_subrs_t;
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struct cff1_cs_interp_env_t : cs_interp_env_t<number_t, CFF1Subrs>
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{
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template <typename ACC>
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void init (const byte_str_t &str, ACC &acc, unsigned int fd)
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{
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SUPER::init (str, acc.globalSubrs, acc.privateDicts[fd].localSubrs);
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processed_width = false;
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has_width = false;
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arg_start = 0;
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in_seac = false;
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}
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void fini () { SUPER::fini (); }
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void set_width (bool has_width_)
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{
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if (likely (!processed_width && (SUPER::argStack.get_count () > 0)))
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{
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if (has_width_)
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{
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width = SUPER::argStack[0];
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has_width = true;
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arg_start = 1;
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}
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}
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processed_width = true;
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}
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void clear_args ()
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{
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arg_start = 0;
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SUPER::clear_args ();
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}
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void set_in_seac (bool _in_seac) { in_seac = _in_seac; }
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bool processed_width;
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bool has_width;
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unsigned int arg_start;
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number_t width;
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bool in_seac;
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private:
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typedef cs_interp_env_t<number_t, CFF1Subrs> SUPER;
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};
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template <typename OPSET, typename PARAM, typename PATH=path_procs_null_t<cff1_cs_interp_env_t, PARAM>>
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struct cff1_cs_opset_t : cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH>
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{
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/* PostScript-originated legacy opcodes (OpCode_add etc) are unsupported */
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/* Type 1-originated deprecated opcodes, seac behavior of endchar and dotsection are supported */
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static void process_op (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param)
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{
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switch (op) {
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case OpCode_dotsection:
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SUPER::flush_args_and_op (op, env, param);
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break;
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case OpCode_endchar:
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OPSET::check_width (op, env, param);
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if (env.argStack.get_count () >= 4)
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{
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OPSET::process_seac (env, param);
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}
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OPSET::flush_args_and_op (op, env, param);
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env.set_endchar (true);
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break;
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default:
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SUPER::process_op (op, env, param);
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}
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}
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static void check_width (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param)
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{
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if (!env.processed_width)
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{
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bool has_width = false;
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switch (op)
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{
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case OpCode_endchar:
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case OpCode_hstem:
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case OpCode_hstemhm:
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case OpCode_vstem:
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case OpCode_vstemhm:
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case OpCode_hintmask:
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case OpCode_cntrmask:
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has_width = ((env.argStack.get_count () & 1) != 0);
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break;
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case OpCode_hmoveto:
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case OpCode_vmoveto:
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has_width = (env.argStack.get_count () > 1);
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break;
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case OpCode_rmoveto:
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has_width = (env.argStack.get_count () > 2);
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break;
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default:
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return;
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}
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env.set_width (has_width);
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}
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}
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static void process_seac (cff1_cs_interp_env_t &env, PARAM& param)
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{
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}
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static void flush_args (cff1_cs_interp_env_t &env, PARAM& param)
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{
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SUPER::flush_args (env, param);
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env.clear_args (); /* pop off width */
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}
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private:
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typedef cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH> SUPER;
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};
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template <typename OPSET, typename PARAM>
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struct cff1_cs_interpreter_t : cs_interpreter_t<cff1_cs_interp_env_t, OPSET, PARAM> {};
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} /* namespace CFF */
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#endif /* HB_CFF1_INTERP_CS_HH */
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