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comparison mupdf-source/thirdparty/harfbuzz/src/hb-cff1-interp-cs.hh @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
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>
41 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
50 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
64 void clear_args ()
65 {
66 arg_start = 0;
67 SUPER::clear_args ();
68 }
69
70 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
88 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
110 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
140 static void process_seac (cff1_cs_interp_env_t &env, PARAM& param)
141 {
142 }
143
144 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 */