1 /* 2 * Copyright © 2018 Adobe Inc. 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Adobe Author(s): Michiharu Ariza 25 */ 26 #ifndef HB_CFF1_INTERP_CS_HH 27 #define HB_CFF1_INTERP_CS_HH 28 29 #include "hb.hh" 30 #include "hb-cff-interp-cs-common.hh" 31 32 namespace CFF { 33 34 using namespace OT; 35 36 typedef biased_subrs_t<CFF1Subrs> cff1_biased_subrs_t; 37 38 struct cff1_cs_interp_env_t : cs_interp_env_t<number_t, CFF1Subrs> 39 { 40 template <typename ACC> cff1_cs_interp_env_tCFF::cff1_cs_interp_env_t41 cff1_cs_interp_env_t (const hb_ubytes_t &str, ACC &acc, unsigned int fd) 42 : SUPER (str, acc.globalSubrs, acc.privateDicts[fd].localSubrs) 43 { 44 processed_width = false; 45 has_width = false; 46 arg_start = 0; 47 in_seac = false; 48 } 49 set_widthCFF::cff1_cs_interp_env_t50 void set_width (bool has_width_) 51 { 52 if (likely (!processed_width && (SUPER::argStack.get_count () > 0))) 53 { 54 if (has_width_) 55 { 56 width = SUPER::argStack[0]; 57 has_width = true; 58 arg_start = 1; 59 } 60 } 61 processed_width = true; 62 } 63 clear_argsCFF::cff1_cs_interp_env_t64 void clear_args () 65 { 66 arg_start = 0; 67 SUPER::clear_args (); 68 } 69 set_in_seacCFF::cff1_cs_interp_env_t70 void set_in_seac (bool _in_seac) { in_seac = _in_seac; } 71 72 bool processed_width; 73 bool has_width; 74 unsigned int arg_start; 75 number_t width; 76 bool in_seac; 77 78 private: 79 typedef cs_interp_env_t<number_t, CFF1Subrs> SUPER; 80 }; 81 82 template <typename OPSET, typename PARAM, typename PATH=path_procs_null_t<cff1_cs_interp_env_t, PARAM>> 83 struct cff1_cs_opset_t : cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH> 84 { 85 /* PostScript-originated legacy opcodes (OpCode_add etc) are unsupported */ 86 /* Type 1-originated deprecated opcodes, seac behavior of endchar and dotsection are supported */ 87 process_opCFF::cff1_cs_opset_t88 static void process_op (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param) 89 { 90 switch (op) { 91 case OpCode_dotsection: 92 SUPER::flush_args_and_op (op, env, param); 93 break; 94 95 case OpCode_endchar: 96 OPSET::check_width (op, env, param); 97 if (env.argStack.get_count () >= 4) 98 { 99 OPSET::process_seac (env, param); 100 } 101 OPSET::flush_args_and_op (op, env, param); 102 env.set_endchar (true); 103 break; 104 105 default: 106 SUPER::process_op (op, env, param); 107 } 108 } 109 check_widthCFF::cff1_cs_opset_t110 static void check_width (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param) 111 { 112 if (!env.processed_width) 113 { 114 bool has_width = false; 115 switch (op) 116 { 117 case OpCode_endchar: 118 case OpCode_hstem: 119 case OpCode_hstemhm: 120 case OpCode_vstem: 121 case OpCode_vstemhm: 122 case OpCode_hintmask: 123 case OpCode_cntrmask: 124 has_width = ((env.argStack.get_count () & 1) != 0); 125 break; 126 case OpCode_hmoveto: 127 case OpCode_vmoveto: 128 has_width = (env.argStack.get_count () > 1); 129 break; 130 case OpCode_rmoveto: 131 has_width = (env.argStack.get_count () > 2); 132 break; 133 default: 134 return; 135 } 136 env.set_width (has_width); 137 } 138 } 139 process_seacCFF::cff1_cs_opset_t140 static void process_seac (cff1_cs_interp_env_t &env, PARAM& param) 141 { 142 } 143 flush_argsCFF::cff1_cs_opset_t144 static void flush_args (cff1_cs_interp_env_t &env, PARAM& param) 145 { 146 SUPER::flush_args (env, param); 147 env.clear_args (); /* pop off width */ 148 } 149 150 private: 151 typedef cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH> SUPER; 152 }; 153 154 template <typename OPSET, typename PARAM> 155 using cff1_cs_interpreter_t = cs_interpreter_t<cff1_cs_interp_env_t, OPSET, PARAM>; 156 157 } /* namespace CFF */ 158 159 #endif /* HB_CFF1_INTERP_CS_HH */ 160