1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* directions.h
Copyright 2009 Taco Hoekwater <taco@luatex.org>
This file is part of LuaTeX.
LuaTeX is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.
LuaTeX is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU General Public License along
with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
#ifndef DIRECTIONS_H
# define DIRECTIONS_H
/*
# define dir_TLT 0
# define dir_TRT 4
# define dir_LTL 9
# define dir_RTT 24
extern const char *dir_strings[128];
*/
# define dir_TLT 0 /* maybe use this one as unset value */
# define dir_TRT 1 /* or should we avoid that one because it's a signal too */
# define dir_LTL 2
# define dir_RTT 3
extern const char *dir_strings[8];
extern int dir_swap;
# define RETURN_DIR_VALUES(a) \
if (s==luaS_##a##_ptr) { \
return (dir_##a); \
} else if (!absolute_only) { \
if (s==luaS_p##a##_ptr) \
return (dir_##a); \
else if (s==luaS_m##a##_ptr) \
return ((dir_##a)-4); \
}
# define BOX_DIR_VALUE(a) \
((s==luaS_p##a##_ptr) : (dir_##a) ? ((s==luaS_m##a##_ptr) : ((dir_##a)-4) ? luaS_pTLT))
# define is_mirrored(a) 0
# define is_rotated(a) (a == dir_RTT)
/*
# define textdir_parallel(a,b) ( \
((a == dir_TLT || a == dir_TRT) && (b == dir_TLT || b == dir_TRT)) || \
((a == dir_LTL || a == dir_RTT) && (b == dir_LTL || b == dir_RTT)) \
)
# define pardir_parallel(a,b) ( \
((a == dir_TLT || a == dir_TRT) && (b == dir_TLT || b == dir_TRT)) || \
((a == dir_LTL || a == dir_RTT) && (b == dir_LTL || b == dir_RTT)) \
)
# define pardir_eq(a,b) ( \
((a == dir_TLT || a == dir_TRT) && (b == dir_TLT || b == dir_TRT)) || \
(a == dir_LTL && b == dir_LTL) || \
(a == dir_RTT && b == dir_RTT) \
)
# define textdir_eq(a,b) ( \
(a == dir_TLT && b == dir_TLT) || \
(a == dir_TRT && b == dir_TRT) || \
(a == dir_LTL && (b == dir_LTL || b == dir_RTT)) || \
(a == dir_RTT && (b == dir_LTL || b == dir_RTT))
# define partextdir_eq(a,b) ( \
((a == dir_TLT || a == dir_TRT) && (b == dir_LTL || b == dir_RTT)) || \
(a == dir_LTL && b == dir_TLT) || \
(a == dir_RTT && b == dir_TRT) \
)
*/
/* # define dir_TLT_or_TRT(a) (a == dir_TLT || a == dir_TRT) */
/* # define dir_LTL_or_RTT(a) (a == dir_LTL || a == dir_RTT) */
# define dir_TLT_or_TRT(a) (a < 2)
# define dir_LTL_or_RTT(a) (a > 1)
# define textdir_parallel(a,b) ( \
(dir_TLT_or_TRT(a) && dir_TLT_or_TRT(b)) || \
(dir_LTL_or_RTT(a) && dir_LTL_or_RTT(b)) \
)
# define pardir_parallel(a,b) ( \
(dir_TLT_or_TRT(a) && dir_TLT_or_TRT(b)) || \
(dir_LTL_or_RTT(a) && dir_LTL_or_RTT(b)) \
)
# define pardir_opposite(a,b) ( \
(a == dir_LTL && b == dir_RTT) || \
(a == dir_RTT && b == dir_LTL) \
)
# define textdir_opposite(a,b) ( \
(a == dir_TLT && b == dir_TRT) || \
(a == dir_TRT && b == dir_TLT) \
)
# define glyphdir_opposite(a,b) 0
# define pardir_eq(a,b) ( \
(dir_TLT_or_TRT(a) && dir_TLT_or_TRT(b)) || \
(a == dir_LTL && b == dir_LTL) || \
(a == dir_RTT && b == dir_RTT) \
)
# define textdir_eq(a,b) ( \
(a == dir_TLT && b == dir_TLT) || \
(a == dir_TRT && b == dir_TRT) || \
(a == dir_LTL && dir_LTL_or_RTT(b)) || \
(a == dir_RTT && dir_LTL_or_RTT(b)) \
)
# define glyphdir_eq(a,b) ( \
(a != dir_LTL && b != dir_LTL) || \
(a == dir_LTL && b == dir_LTL) \
)
# define partextdir_eq(a,b) ( \
(dir_TLT_or_TRT(a) && dir_LTL_or_RTT(b)) || \
(a == dir_LTL && b == dir_TLT) || \
(a == dir_RTT && b == dir_TRT) \
)
# define textglyphdir_orthogonal(a) (a != dir_RTT)
# define textdir_is_L(a) (a == dir_TLT)
# define push_dir(p,a) { \
halfword dir_tmp=new_dir((a)); \
vlink(dir_tmp)=p; \
p=dir_tmp; \
}
# define push_dir_node(p,a) { \
halfword dir_tmp=copy_node((a)); \
vlink(dir_tmp)=p; \
p=dir_tmp; \
}
# define pop_dir_node(p) { \
halfword dir_tmp=p; \
p=vlink(dir_tmp); \
flush_node(dir_tmp); \
}
extern halfword dir_ptr;
extern halfword text_dir_ptr;
extern void initialize_directions(void);
extern halfword new_dir(int s);
extern const char *string_dir(int d);
extern void print_dir(int d);
extern void scan_direction(void);
extern halfword do_push_dir_node(halfword p, halfword a);
extern halfword do_pop_dir_node(halfword p);
scaled pack_width(int curdir, int pdir, halfword p, boolean isglyph);
scaled_whd pack_width_height_depth(int curdir, int pdir, halfword p, boolean isglyph);
void update_text_dir_ptr(int val);
#endif
|
