1 /* Copyright (C) 2001-2019 Artifex Software, Inc.
2 All Rights Reserved.
3
4 This software is provided AS-IS with no warranty, either express or
5 implied.
6
7 This software is distributed under license and may not be copied,
8 modified or distributed except as expressly authorized under the terms
9 of the license contained in the file LICENSE in this distribution.
10
11 Refer to licensing information at http://www.artifex.com or contact
12 Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato,
13 CA 94945, U.S.A., +1(415)492-9861, for further information.
14 */
15
16
17 /* Tables for CCITTFaxEncode filter */
18 #include "std.h"
19 #include "scommon.h" /* for scf.h */
20 #include "scf.h"
21
22 /* We make this a separate file so that it can be used by */
23 /* the program that generates the tables for the CCITTFaxDecode filter. */
24
25 /* ------ Run encoding tables ------ */
26
27 /* Abbreviate hce_entry to make the file smaller. */
28 #define RUN(c,len) hce_entry(c,len)
29
30 /* Define the end-of-line code. */
31 /* Code in scfd.c and scfdgen.c knows that the run value is 1. */
32 const cfe_run cf_run_eol =
33 RUN(run_eol_code_value, run_eol_code_length);
34
35 /* Define the 1-D code that signals uncompressed data. */
36 const cfe_run cf1_run_uncompressed =
37 RUN(0xf, 12);
38
39 /* Define the 2-D run codes. */
40 const cfe_run cf2_run_pass =
41 RUN(cf2_run_pass_value, cf2_run_pass_length);
42 const cfe_run cf2_run_vertical[7] =
43 {
44 RUN(0x3, 7),
45 RUN(0x3, 6),
46 RUN(0x3, 3),
47 RUN(0x1, 1),
48 RUN(0x2, 3),
49 RUN(0x2, 6),
50 RUN(0x2, 7)
51 };
52 const cfe_run cf2_run_horizontal =
53 RUN(cf2_run_horizontal_value, cf2_run_horizontal_length);
54 const cfe_run cf2_run_uncompressed =
55 RUN(0xf, 10);
56
57 /* EOL codes for Group 3 2-D. */
58 /* Code in scfd.c knows that these are 0...01x. */
59 const cfe_run cf2_run_eol_1d =
60 RUN((run_eol_code_value << 1) + 1, run_eol_code_length + 1);
61 const cfe_run cf2_run_eol_2d =
62 RUN((run_eol_code_value << 1) + 0, run_eol_code_length + 1);
63
64 /* White run codes. */
65 const cf_runs cf_white_runs =
66 {
67 { /* Termination codes */
68 RUN(0x35, 8), RUN(0x7, 6), RUN(0x7, 4), RUN(0x8, 4),
69 RUN(0xb, 4), RUN(0xc, 4), RUN(0xe, 4), RUN(0xf, 4),
70 RUN(0x13, 5), RUN(0x14, 5), RUN(0x7, 5), RUN(0x8, 5),
71 RUN(0x8, 6), RUN(0x3, 6), RUN(0x34, 6), RUN(0x35, 6),
72 RUN(0x2a, 6), RUN(0x2b, 6), RUN(0x27, 7), RUN(0xc, 7),
73 RUN(0x8, 7), RUN(0x17, 7), RUN(0x3, 7), RUN(0x4, 7),
74 RUN(0x28, 7), RUN(0x2b, 7), RUN(0x13, 7), RUN(0x24, 7),
75 RUN(0x18, 7), RUN(0x2, 8), RUN(0x3, 8), RUN(0x1a, 8),
76 RUN(0x1b, 8), RUN(0x12, 8), RUN(0x13, 8), RUN(0x14, 8),
77 RUN(0x15, 8), RUN(0x16, 8), RUN(0x17, 8), RUN(0x28, 8),
78 RUN(0x29, 8), RUN(0x2a, 8), RUN(0x2b, 8), RUN(0x2c, 8),
79 RUN(0x2d, 8), RUN(0x4, 8), RUN(0x5, 8), RUN(0xa, 8),
80 RUN(0xb, 8), RUN(0x52, 8), RUN(0x53, 8), RUN(0x54, 8),
81 RUN(0x55, 8), RUN(0x24, 8), RUN(0x25, 8), RUN(0x58, 8),
82 RUN(0x59, 8), RUN(0x5a, 8), RUN(0x5b, 8), RUN(0x4a, 8),
83 RUN(0x4b, 8), RUN(0x32, 8), RUN(0x33, 8), RUN(0x34, 8)
84 },
85 { /* Make-up codes */
86 RUN(0, 0) /* dummy */ , RUN(0x1b, 5), RUN(0x12, 5), RUN(0x17, 6),
87 RUN(0x37, 7), RUN(0x36, 8), RUN(0x37, 8), RUN(0x64, 8),
88 RUN(0x65, 8), RUN(0x68, 8), RUN(0x67, 8), RUN(0xcc, 9),
89 RUN(0xcd, 9), RUN(0xd2, 9), RUN(0xd3, 9), RUN(0xd4, 9),
90 RUN(0xd5, 9), RUN(0xd6, 9), RUN(0xd7, 9), RUN(0xd8, 9),
91 RUN(0xd9, 9), RUN(0xda, 9), RUN(0xdb, 9), RUN(0x98, 9),
92 RUN(0x99, 9), RUN(0x9a, 9), RUN(0x18, 6), RUN(0x9b, 9),
93 RUN(0x8, 11), RUN(0xc, 11), RUN(0xd, 11), RUN(0x12, 12),
94 RUN(0x13, 12), RUN(0x14, 12), RUN(0x15, 12), RUN(0x16, 12),
95 RUN(0x17, 12), RUN(0x1c, 12), RUN(0x1d, 12), RUN(0x1e, 12),
96 RUN(0x1f, 12)
97 }
98 };
99
100 /* Black run codes. */
101 const cf_runs cf_black_runs =
102 {
103 { /* Termination codes */
104 RUN(0x37, 10), RUN(0x2, 3), RUN(0x3, 2), RUN(0x2, 2),
105 RUN(0x3, 3), RUN(0x3, 4), RUN(0x2, 4), RUN(0x3, 5),
106 RUN(0x5, 6), RUN(0x4, 6), RUN(0x4, 7), RUN(0x5, 7),
107 RUN(0x7, 7), RUN(0x4, 8), RUN(0x7, 8), RUN(0x18, 9),
108 RUN(0x17, 10), RUN(0x18, 10), RUN(0x8, 10), RUN(0x67, 11),
109 RUN(0x68, 11), RUN(0x6c, 11), RUN(0x37, 11), RUN(0x28, 11),
110 RUN(0x17, 11), RUN(0x18, 11), RUN(0xca, 12), RUN(0xcb, 12),
111 RUN(0xcc, 12), RUN(0xcd, 12), RUN(0x68, 12), RUN(0x69, 12),
112 RUN(0x6a, 12), RUN(0x6b, 12), RUN(0xd2, 12), RUN(0xd3, 12),
113 RUN(0xd4, 12), RUN(0xd5, 12), RUN(0xd6, 12), RUN(0xd7, 12),
114 RUN(0x6c, 12), RUN(0x6d, 12), RUN(0xda, 12), RUN(0xdb, 12),
115 RUN(0x54, 12), RUN(0x55, 12), RUN(0x56, 12), RUN(0x57, 12),
116 RUN(0x64, 12), RUN(0x65, 12), RUN(0x52, 12), RUN(0x53, 12),
117 RUN(0x24, 12), RUN(0x37, 12), RUN(0x38, 12), RUN(0x27, 12),
118 RUN(0x28, 12), RUN(0x58, 12), RUN(0x59, 12), RUN(0x2b, 12),
119 RUN(0x2c, 12), RUN(0x5a, 12), RUN(0x66, 12), RUN(0x67, 12)
120 },
121 { /* Make-up codes. */
122 RUN(0, 0) /* dummy */ , RUN(0xf, 10), RUN(0xc8, 12), RUN(0xc9, 12),
123 RUN(0x5b, 12), RUN(0x33, 12), RUN(0x34, 12), RUN(0x35, 12),
124 RUN(0x6c, 13), RUN(0x6d, 13), RUN(0x4a, 13), RUN(0x4b, 13),
125 RUN(0x4c, 13), RUN(0x4d, 13), RUN(0x72, 13), RUN(0x73, 13),
126 RUN(0x74, 13), RUN(0x75, 13), RUN(0x76, 13), RUN(0x77, 13),
127 RUN(0x52, 13), RUN(0x53, 13), RUN(0x54, 13), RUN(0x55, 13),
128 RUN(0x5a, 13), RUN(0x5b, 13), RUN(0x64, 13), RUN(0x65, 13),
129 RUN(0x8, 11), RUN(0xc, 11), RUN(0xd, 11), RUN(0x12, 12),
130 RUN(0x13, 12), RUN(0x14, 12), RUN(0x15, 12), RUN(0x16, 12),
131 RUN(0x17, 12), RUN(0x1c, 12), RUN(0x1d, 12), RUN(0x1e, 12),
132 RUN(0x1f, 12)
133 }
134 };
135
136 /* Uncompressed codes. */
137 const cfe_run cf_uncompressed[6] =
138 {
139 RUN(1, 1),
140 RUN(1, 2),
141 RUN(1, 3),
142 RUN(1, 4),
143 RUN(1, 5),
144 RUN(1, 6)
145 };
146
147 /* Uncompressed exit codes. */
148 const cfe_run cf_uncompressed_exit[10] =
149 {
150 RUN(2, 8), RUN(3, 8),
151 RUN(2, 9), RUN(3, 9),
152 RUN(2, 10), RUN(3, 10),
153 RUN(2, 11), RUN(3, 11),
154 RUN(2, 12), RUN(3, 12)
155 };
156
157 /* Some C compilers insist on having executable code in every file.... */
158 void scfetab_dummy(void); /* for picky compilers */
159 void
scfetab_dummy(void)160 scfetab_dummy(void)
161 {
162 }
163