2 * Copyright © 2018 Adobe Inc.
4 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
24 * Adobe Author(s): Michiharu Ariza
26 #ifndef HB_CFF_INTERP_DICT_COMMON_HH
27 #define HB_CFF_INTERP_DICT_COMMON_HH
29 #include "hb-cff-interp-common.hh"
35 /* an opstr and the parsed out dict value(s) */
36 struct dict_val_t
: op_str_t
38 void init () { single_val
.set_int (0); }
44 typedef dict_val_t num_dict_val_t
;
46 template <typename VAL
> struct dict_values_t
: parsed_values_t
<VAL
> {};
48 template <typename OPSTR
=op_str_t
>
49 struct top_dict_values_t
: dict_values_t
<OPSTR
>
53 dict_values_t
<OPSTR
>::init ();
54 charStringsOffset
= 0;
57 void fini () { dict_values_t
<OPSTR
>::fini (); }
59 unsigned int charStringsOffset
;
60 unsigned int FDArrayOffset
;
63 struct dict_opset_t
: opset_t
<number_t
>
65 static void process_op (op_code_t op
, interp_env_t
<number_t
>& env
)
68 case OpCode_longintdict
: /* 5-byte integer */
69 env
.argStack
.push_longint_from_substr (env
.str_ref
);
72 case OpCode_BCD
: /* real number */
73 env
.argStack
.push_real (parse_bcd (env
.str_ref
));
77 opset_t
<number_t
>::process_op (op
, env
);
82 /* Turns CFF's BCD format into strtod understandable string */
83 static double parse_bcd (byte_str_ref_t
& str_ref
)
85 if (unlikely (str_ref
.in_error ())) return .0;
87 enum Nibble
{ DECIMAL
=10, EXP_POS
, EXP_NEG
, RESERVED
, NEG
, END
};
90 unsigned char byte
= 0;
91 for (unsigned i
= 0, count
= 0; count
< ARRAY_LENGTH (buf
); ++i
, ++count
)
96 if (unlikely (!str_ref
.avail ())) break;
103 nibble
= byte
& 0x0F;
105 if (unlikely (nibble
== RESERVED
)) break;
106 else if (nibble
== END
)
110 if (unlikely (!hb_parse_double (&p
, p
+ count
, &pv
, true/* whole buffer */)))
116 buf
[count
] = "0123456789.EE?-?"[nibble
];
117 if (nibble
== EXP_NEG
)
120 if (unlikely (count
== ARRAY_LENGTH (buf
))) break;
126 str_ref
.set_error ();
130 static bool is_hint_op (op_code_t op
)
134 case OpCode_BlueValues
:
135 case OpCode_OtherBlues
:
136 case OpCode_FamilyBlues
:
137 case OpCode_FamilyOtherBlues
:
138 case OpCode_StemSnapH
:
139 case OpCode_StemSnapV
:
142 case OpCode_BlueScale
:
143 case OpCode_BlueShift
:
144 case OpCode_BlueFuzz
:
145 case OpCode_ForceBold
:
146 case OpCode_LanguageGroup
:
147 case OpCode_ExpansionFactor
:
155 template <typename VAL
=op_str_t
>
156 struct top_dict_opset_t
: dict_opset_t
158 static void process_op (op_code_t op
, interp_env_t
<number_t
>& env
, top_dict_values_t
<VAL
> & dictval
)
161 case OpCode_CharStrings
:
162 dictval
.charStringsOffset
= env
.argStack
.pop_uint ();
166 dictval
.FDArrayOffset
= env
.argStack
.pop_uint ();
169 case OpCode_FontMatrix
:
173 dict_opset_t::process_op (op
, env
);
179 template <typename OPSET
, typename PARAM
, typename ENV
=num_interp_env_t
>
180 struct dict_interpreter_t
: interpreter_t
<ENV
>
182 bool interpret (PARAM
& param
)
185 while (SUPER::env
.str_ref
.avail ())
187 OPSET::process_op (SUPER::env
.fetch_op (), SUPER::env
, param
);
188 if (unlikely (SUPER::env
.in_error ()))
196 typedef interpreter_t
<ENV
> SUPER
;
199 } /* namespace CFF */
201 #endif /* HB_CFF_INTERP_DICT_COMMON_HH */