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author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-08-19 03:12:28 +0000 |
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committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-08-19 03:12:28 +0000 |
commit | 1fd361a1ea06e44286c213ca1f814f49306fdc43 (patch) | |
tree | 64c8c96cf54d8718847339a403e5e67b922e8c3f /converter/pbm/g3.h | |
download | netpbm-mirror-1fd361a1ea06e44286c213ca1f814f49306fdc43.tar.gz netpbm-mirror-1fd361a1ea06e44286c213ca1f814f49306fdc43.tar.xz netpbm-mirror-1fd361a1ea06e44286c213ca1f814f49306fdc43.zip |
Create Subversion repository
git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'converter/pbm/g3.h')
-rw-r--r-- | converter/pbm/g3.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/converter/pbm/g3.h b/converter/pbm/g3.h new file mode 100644 index 00000000..e982f2da --- /dev/null +++ b/converter/pbm/g3.h @@ -0,0 +1,146 @@ +/* G3 fax format declarations */ + +#ifndef G3_H_INCLUDED +#define G3_H_INCLUDED + +/* G3 is nearly universal as the format for fax transmissions in the + US. Its full name is CCITT Group 3 (G3). It is specified in + Recommendations T.4 and T.30 and in EIA Standards EIA-465 and + EIA-466. It dates to 1993. + + G3 faxes are 204 dots per inch (dpi) horizontally and 98 dpi (196 + dpi optionally, in fine-detail mode) vertically. Since G3 neither + assumes error free transmission nor retransmits when errors occur, + the encoding scheme used is differential only over small segments + never exceeding 2 lines at standard resolution or 4 lines for + fine-detail. (The incremental G3 encoding scheme is called + two-dimensional and the number of lines so encoded is specified by + a parameter called k.) + + G3 specifies much more than the format of the bit stream, which is + the subject of this header file. It also specifies layers + underneath the bit stream. + + There is also the newer G4. +*/ + +typedef struct g3TableEntry { + short int code; + short int length; +} g3TableEntry; + +static struct g3TableEntry ttable[] = { +/* TERMWHITE TERMBLACK */ + { 0x35, 8 }, { 0x37, 10 }, /* white 0 , black 0 */ + { 0x07, 6 }, { 0x02, 3 }, + { 0x07, 4 }, { 0x03, 2 }, + { 0x08, 4 }, { 0x02, 2 }, + { 0x0b, 4 }, { 0x03, 3 }, + { 0x0c, 4 }, { 0x03, 4 }, + { 0x0e, 4 }, { 0x02, 4 }, + { 0x0f, 4 }, { 0x03, 5 }, + { 0x13, 5 }, { 0x05, 6 }, + { 0x14, 5 }, { 0x04, 6 }, + { 0x07, 5 }, { 0x04, 7 }, + { 0x08, 5 }, { 0x05, 7 }, + { 0x08, 6 }, { 0x07, 7 }, + { 0x03, 6 }, { 0x04, 8 }, + { 0x34, 6 }, { 0x07, 8 }, + { 0x35, 6 }, { 0x18, 9 }, + { 0x2a, 6 }, { 0x17, 10 }, + { 0x2b, 6 }, { 0x18, 10 }, + { 0x27, 7 }, { 0x08, 10 }, + { 0x0c, 7 }, { 0x67, 11 }, + { 0x08, 7 }, { 0x68, 11 }, + { 0x17, 7 }, { 0x6c, 11 }, + { 0x03, 7 }, { 0x37, 11 }, + { 0x04, 7 }, { 0x28, 11 }, + { 0x28, 7 }, { 0x17, 11 }, + { 0x2b, 7 }, { 0x18, 11 }, + { 0x13, 7 }, { 0xca, 12 }, + { 0x24, 7 }, { 0xcb, 12 }, + { 0x18, 7 }, { 0xcc, 12 }, + { 0x02, 8 }, { 0xcd, 12 }, + { 0x03, 8 }, { 0x68, 12 }, + { 0x1a, 8 }, { 0x69, 12 }, + { 0x1b, 8 }, { 0x6a, 12 }, + { 0x12, 8 }, { 0x6b, 12 }, + { 0x13, 8 }, { 0xd2, 12 }, + { 0x14, 8 }, { 0xd3, 12 }, + { 0x15, 8 }, { 0xd4, 12 }, + { 0x16, 8 }, { 0xd5, 12 }, + { 0x17, 8 }, { 0xd6, 12 }, + { 0x28, 8 }, { 0xd7, 12 }, + { 0x29, 8 }, { 0x6c, 12 }, + { 0x2a, 8 }, { 0x6d, 12 }, + { 0x2b, 8 }, { 0xda, 12 }, + { 0x2c, 8 }, { 0xdb, 12 }, + { 0x2d, 8 }, { 0x54, 12 }, + { 0x04, 8 }, { 0x55, 12 }, + { 0x05, 8 }, { 0x56, 12 }, + { 0x0a, 8 }, { 0x57, 12 }, + { 0x0b, 8 }, { 0x64, 12 }, + { 0x52, 8 }, { 0x65, 12 }, + { 0x53, 8 }, { 0x52, 12 }, + { 0x54, 8 }, { 0x53, 12 }, + { 0x55, 8 }, { 0x24, 12 }, + { 0x24, 8 }, { 0x37, 12 }, + { 0x25, 8 }, { 0x38, 12 }, + { 0x58, 8 }, { 0x27, 12 }, + { 0x59, 8 }, { 0x28, 12 }, + { 0x5a, 8 }, { 0x58, 12 }, + { 0x5b, 8 }, { 0x59, 12 }, + { 0x4a, 8 }, { 0x2b, 12 }, + { 0x4b, 8 }, { 0x2c, 12 }, + { 0x32, 8 }, { 0x5a, 12 }, + { 0x33, 8 }, { 0x66, 12 }, + { 0x34, 8 }, { 0x67, 12 }, /* white 63 , black 63 */ + +/* mtable */ +/* MKUPWHITE MKUPBLACK */ + { 0x00, 0 }, { 0x00, 0 }, /* dummy to simplify pointer math */ + { 0x1b, 5 }, { 0x0f, 10 }, /* white 64 , black 64 */ + { 0x12, 5 }, { 0xc8, 12 }, + { 0x17, 6 }, { 0xc9, 12 }, + { 0x37, 7 }, { 0x5b, 12 }, + { 0x36, 8 }, { 0x33, 12 }, + { 0x37, 8 }, { 0x34, 12 }, + { 0x64, 8 }, { 0x35, 12 }, + { 0x65, 8 }, { 0x6c, 13 }, + { 0x68, 8 }, { 0x6d, 13 }, + { 0x67, 8 }, { 0x4a, 13 }, + { 0xcc, 9 }, { 0x4b, 13 }, + { 0xcd, 9 }, { 0x4c, 13 }, + { 0xd2, 9 }, { 0x4d, 13 }, + { 0xd3, 9 }, { 0x72, 13 }, + { 0xd4, 9 }, { 0x73, 13 }, + { 0xd5, 9 }, { 0x74, 13 }, + { 0xd6, 9 }, { 0x75, 13 }, + { 0xd7, 9 }, { 0x76, 13 }, + { 0xd8, 9 }, { 0x77, 13 }, + { 0xd9, 9 }, { 0x52, 13 }, + { 0xda, 9 }, { 0x53, 13 }, + { 0xdb, 9 }, { 0x54, 13 }, + { 0x98, 9 }, { 0x55, 13 }, + { 0x99, 9 }, { 0x5a, 13 }, + { 0x9a, 9 }, { 0x5b, 13 }, + { 0x18, 6 }, { 0x64, 13 }, + { 0x9b, 9 }, { 0x65, 13 }, + { 0x08, 11 }, { 0x08, 11 }, /* extable len = 1792 */ + { 0x0c, 11 }, { 0x0c, 11 }, + { 0x0d, 11 }, { 0x0d, 11 }, + { 0x12, 12 }, { 0x12, 12 }, + { 0x13, 12 }, { 0x13, 12 }, + { 0x14, 12 }, { 0x14, 12 }, + { 0x15, 12 }, { 0x15, 12 }, + { 0x16, 12 }, { 0x16, 12 }, + { 0x17, 12 }, { 0x17, 12 }, + { 0x1c, 12 }, { 0x1c, 12 }, + { 0x1d, 12 }, { 0x1d, 12 }, + { 0x1e, 12 }, { 0x1e, 12 }, + { 0x1f, 12 }, { 0x1f, 12 }, +}; + +#define mtable ((ttable)+64*2) + +#endif |