| /* |
| * 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 */ |