home *** CD-ROM | disk | FTP | other *** search
open in: 
MacOS 8.1
|
Win98
|
DOS
browse contents |
view JSON data
|
view as text
This file was processed as: SHell self-extracting ARchive
(archive/shar).
| Confidence | Program | Detection | Match Type | Support
|
|---|
| 100%
| dexvert
| Newsgroup Content (archive/news)
| magic
| Supported |
| 100%
| dexvert
| SHell self-extracting ARchive (archive/shar)
| magic
| Supported |
| 100%
| dexvert
| Internet Message Format (text/imf)
| magic
| Supported |
| 1%
| dexvert
| Text File (text/txt)
| fallback
| Supported |
| 100%
| file
| news or mail, ASCII text
| default
| |
| 100%
| TrID
| E-Mail message (Var. 2)
| default
| |
| 100%
| checkBytes
| Printable ASCII
| default
| |
| 100%
| perlTextCheck
| Likely Text (Perl)
| default
| |
| 100%
| siegfried
| fmt/329 Shell Archive Format
| default
| |
| 100%
| detectItEasy
| Format: plain text[LF]
| default (weak)
| |
| 100%
| xdgMime
| message/rfc822
| default
|
|
hex view+--------+-------------------------+-------------------------+--------+--------+
|00000000| 46 72 6f 6d 3a 20 6a 70 | 65 67 2d 69 6e 66 6f 40 |From: jp|eg-info@|
|00000010| 75 75 6e 65 74 2e 75 75 | 2e 6e 65 74 20 28 49 6e |uunet.uu|.net (In|
|00000020| 64 65 70 65 6e 64 65 6e | 74 20 4a 50 45 47 20 47 |dependen|t JPEG G|
|00000030| 72 6f 75 70 29 0a 4e 65 | 77 73 67 72 6f 75 70 73 |roup).Ne|wsgroups|
|00000040| 3a 20 63 6f 6d 70 2e 73 | 6f 75 72 63 65 73 2e 6d |: comp.s|ources.m|
|00000050| 69 73 63 0a 53 75 62 6a | 65 63 74 3a 20 76 34 34 |isc.Subj|ect: v44|
|00000060| 69 31 30 33 3a 20 20 6a | 70 65 67 20 2d 20 4a 50 |i103: j|peg - JP|
|00000070| 45 47 20 69 6d 61 67 65 | 20 63 6f 6d 70 72 65 73 |EG image| compres|
|00000080| 73 69 6f 6e 2c 20 50 61 | 72 74 30 36 2f 32 37 0a |sion, Pa|rt06/27.|
|00000090| 44 61 74 65 3a 20 32 36 | 20 53 65 70 20 31 39 39 |Date: 26| Sep 199|
|000000a0| 34 20 31 36 3a 31 34 3a | 32 31 20 2d 30 35 30 30 |4 16:14:|21 -0500|
|000000b0| 0a 4f 72 67 61 6e 69 7a | 61 74 69 6f 6e 3a 20 53 |.Organiz|ation: S|
|000000c0| 74 65 72 6c 69 6e 67 20 | 53 6f 66 74 77 61 72 65 |terling |Software|
|000000d0| 0a 53 65 6e 64 65 72 3a | 20 6b 65 6e 74 40 73 70 |.Sender:| kent@sp|
|000000e0| 61 72 6b 79 2e 73 74 65 | 72 6c 69 6e 67 2e 63 6f |arky.ste|rling.co|
|000000f0| 6d 0a 41 70 70 72 6f 76 | 65 64 3a 20 6b 65 6e 74 |m.Approv|ed: kent|
|00000100| 40 73 70 61 72 6b 79 2e | 73 74 65 72 6c 69 6e 67 |@sparky.|sterling|
|00000110| 2e 63 6f 6d 0a 4d 65 73 | 73 61 67 65 2d 49 44 3a |.com.Mes|sage-ID:|
|00000120| 20 3c 33 36 37 64 6a 64 | 24 38 35 6d 40 73 70 61 | <367djd|$85m@spa|
|00000130| 72 6b 79 2e 73 74 65 72 | 6c 69 6e 67 2e 63 6f 6d |rky.ster|ling.com|
|00000140| 3e 0a 58 2d 4d 64 34 2d | 53 69 67 6e 61 74 75 72 |>.X-Md4-|Signatur|
|00000150| 65 3a 20 30 62 61 61 38 | 65 35 36 30 66 34 37 62 |e: 0baa8|e560f47b|
|00000160| 31 34 36 38 63 30 64 32 | 39 34 64 39 38 64 65 37 |1468c0d2|94d98de7|
|00000170| 35 34 39 0a 0a 53 75 62 | 6d 69 74 74 65 64 2d 62 |549..Sub|mitted-b|
|00000180| 79 3a 20 6a 70 65 67 2d | 69 6e 66 6f 40 75 75 6e |y: jpeg-|info@uun|
|00000190| 65 74 2e 75 75 2e 6e 65 | 74 20 28 49 6e 64 65 70 |et.uu.ne|t (Indep|
|000001a0| 65 6e 64 65 6e 74 20 4a | 50 45 47 20 47 72 6f 75 |endent J|PEG Grou|
|000001b0| 70 29 0a 50 6f 73 74 69 | 6e 67 2d 6e 75 6d 62 65 |p).Posti|ng-numbe|
|000001c0| 72 3a 20 56 6f 6c 75 6d | 65 20 34 34 2c 20 49 73 |r: Volum|e 44, Is|
|000001d0| 73 75 65 20 31 30 33 0a | 41 72 63 68 69 76 65 2d |sue 103.|Archive-|
|000001e0| 6e 61 6d 65 3a 20 6a 70 | 65 67 2f 70 61 72 74 30 |name: jp|eg/part0|
|000001f0| 36 0a 45 6e 76 69 72 6f | 6e 6d 65 6e 74 3a 20 55 |6.Enviro|nment: U|
|00000200| 4e 49 58 2c 20 56 4d 53 | 2c 20 4d 53 2d 44 4f 53 |NIX, VMS|, MS-DOS|
|00000210| 2c 20 4d 61 63 2c 20 41 | 6d 69 67 61 2c 20 41 74 |, Mac, A|miga, At|
|00000220| 61 72 69 2c 20 43 72 61 | 79 0a 53 75 70 65 72 73 |ari, Cra|y.Supers|
|00000230| 65 64 65 73 3a 20 6a 70 | 65 67 3a 20 56 6f 6c 75 |edes: jp|eg: Volu|
|00000240| 6d 65 20 33 34 2c 20 49 | 73 73 75 65 20 35 35 2d |me 34, I|ssue 55-|
|00000250| 37 32 0a 0a 23 21 20 2f | 62 69 6e 2f 73 68 0a 23 |72..#! /|bin/sh.#|
|00000260| 20 54 68 69 73 20 69 73 | 20 61 20 73 68 65 6c 6c | This is| a shell|
|00000270| 20 61 72 63 68 69 76 65 | 2e 20 20 52 65 6d 6f 76 | archive|. Remov|
|00000280| 65 20 61 6e 79 74 68 69 | 6e 67 20 62 65 66 6f 72 |e anythi|ng befor|
|00000290| 65 20 74 68 69 73 20 6c | 69 6e 65 2c 20 74 68 65 |e this l|ine, the|
|000002a0| 6e 20 66 65 65 64 20 69 | 74 0a 23 20 69 6e 74 6f |n feed i|t.# into|
|000002b0| 20 61 20 73 68 65 6c 6c | 20 76 69 61 20 22 73 68 | a shell| via "sh|
|000002c0| 20 66 69 6c 65 22 20 6f | 72 20 73 69 6d 69 6c 61 | file" o|r simila|
|000002d0| 72 2e 20 20 54 6f 20 6f | 76 65 72 77 72 69 74 65 |r. To o|verwrite|
|000002e0| 20 65 78 69 73 74 69 6e | 67 20 66 69 6c 65 73 2c | existin|g files,|
|000002f0| 0a 23 20 74 79 70 65 20 | 22 73 68 20 66 69 6c 65 |.# type |"sh file|
|00000300| 20 2d 63 22 2e 0a 23 20 | 43 6f 6e 74 65 6e 74 73 | -c"..# |Contents|
|00000310| 3a 20 20 72 64 62 6d 70 | 2e 63 20 73 74 72 75 63 |: rdbmp|.c struc|
|00000320| 74 75 72 65 2e 64 6f 63 | 0a 23 20 57 72 61 70 70 |ture.doc|.# Wrapp|
|00000330| 65 64 20 62 79 20 6b 65 | 6e 74 40 73 70 61 72 6b |ed by ke|nt@spark|
|00000340| 79 20 6f 6e 20 4d 6f 6e | 20 53 65 70 20 32 36 20 |y on Mon| Sep 26 |
|00000350| 31 35 3a 30 30 3a 32 37 | 20 31 39 39 34 0a 50 41 |15:00:27| 1994.PA|
|00000360| 54 48 3d 2f 62 69 6e 3a | 2f 75 73 72 2f 62 69 6e |TH=/bin:|/usr/bin|
|00000370| 3a 2f 75 73 72 2f 75 63 | 62 3a 2f 75 73 72 2f 6c |:/usr/uc|b:/usr/l|
|00000380| 6f 63 61 6c 2f 62 69 6e | 3a 2f 75 73 72 2f 6c 62 |ocal/bin|:/usr/lb|
|00000390| 69 6e 3a 24 50 41 54 48 | 20 3b 20 65 78 70 6f 72 |in:$PATH| ; expor|
|000003a0| 74 20 50 41 54 48 0a 65 | 63 68 6f 20 49 66 20 74 |t PATH.e|cho If t|
|000003b0| 68 69 73 20 61 72 63 68 | 69 76 65 20 69 73 20 63 |his arch|ive is c|
|000003c0| 6f 6d 70 6c 65 74 65 2c | 20 79 6f 75 20 77 69 6c |omplete,| you wil|
|000003d0| 6c 20 73 65 65 20 74 68 | 65 20 66 6f 6c 6c 6f 77 |l see th|e follow|
|000003e0| 69 6e 67 20 6d 65 73 73 | 61 67 65 3a 0a 65 63 68 |ing mess|age:.ech|
|000003f0| 6f 20 27 20 20 20 20 20 | 20 20 20 20 20 22 73 68 |o ' | "sh|
|00000400| 61 72 3a 20 45 6e 64 20 | 6f 66 20 61 72 63 68 69 |ar: End |of archi|
|00000410| 76 65 20 36 20 28 6f 66 | 20 32 37 29 2e 22 27 0a |ve 6 (of| 27)."'.|
|00000420| 69 66 20 74 65 73 74 20 | 2d 66 20 27 72 64 62 6d |if test |-f 'rdbm|
|00000430| 70 2e 63 27 20 2d 61 20 | 22 24 7b 31 7d 22 20 21 |p.c' -a |"${1}" !|
|00000440| 3d 20 22 2d 63 22 20 3b | 20 74 68 65 6e 20 0a 20 |= "-c" ;| then . |
|00000450| 20 65 63 68 6f 20 73 68 | 61 72 3a 20 57 69 6c 6c | echo sh|ar: Will|
|00000460| 20 6e 6f 74 20 63 6c 6f | 62 62 65 72 20 65 78 69 | not clo|bber exi|
|00000470| 73 74 69 6e 67 20 66 69 | 6c 65 20 5c 22 27 72 64 |sting fi|le \"'rd|
|00000480| 62 6d 70 2e 63 27 5c 22 | 0a 65 6c 73 65 0a 20 20 |bmp.c'\"|.else. |
|00000490| 65 63 68 6f 20 73 68 61 | 72 3a 20 45 78 74 72 61 |echo sha|r: Extra|
|000004a0| 63 74 69 6e 67 20 5c 22 | 27 72 64 62 6d 70 2e 63 |cting \"|'rdbmp.c|
|000004b0| 27 5c 22 20 5c 28 31 33 | 32 34 36 20 63 68 61 72 |'\" \(13|246 char|
|000004c0| 61 63 74 65 72 73 5c 29 | 0a 20 20 73 65 64 20 22 |acters\)|. sed "|
|000004d0| 73 2f 5e 58 2f 2f 22 20 | 3e 27 72 64 62 6d 70 2e |s/^X//" |>'rdbmp.|
|000004e0| 63 27 20 3c 3c 27 45 4e | 44 5f 4f 46 5f 46 49 4c |c' <<'EN|D_OF_FIL|
|000004f0| 45 27 0a 58 2f 2a 0a 58 | 20 2a 20 72 64 62 6d 70 |E'.X/*.X| * rdbmp|
|00000500| 2e 63 0a 58 20 2a 0a 58 | 20 2a 20 43 6f 70 79 72 |.c.X *.X| * Copyr|
|00000510| 69 67 68 74 20 28 43 29 | 20 31 39 39 34 2c 20 54 |ight (C)| 1994, T|
|00000520| 68 6f 6d 61 73 20 47 2e | 20 4c 61 6e 65 2e 0a 58 |homas G.| Lane..X|
|00000530| 20 2a 20 54 68 69 73 20 | 66 69 6c 65 20 69 73 20 | * This |file is |
|00000540| 70 61 72 74 20 6f 66 20 | 74 68 65 20 49 6e 64 65 |part of |the Inde|
|00000550| 70 65 6e 64 65 6e 74 20 | 4a 50 45 47 20 47 72 6f |pendent |JPEG Gro|
|00000560| 75 70 27 73 20 73 6f 66 | 74 77 61 72 65 2e 0a 58 |up's sof|tware..X|
|00000570| 20 2a 20 46 6f 72 20 63 | 6f 6e 64 69 74 69 6f 6e | * For c|ondition|
|00000580| 73 20 6f 66 20 64 69 73 | 74 72 69 62 75 74 69 6f |s of dis|tributio|
|00000590| 6e 20 61 6e 64 20 75 73 | 65 2c 20 73 65 65 20 74 |n and us|e, see t|
|000005a0| 68 65 20 61 63 63 6f 6d | 70 61 6e 79 69 6e 67 20 |he accom|panying |
|000005b0| 52 45 41 44 4d 45 20 66 | 69 6c 65 2e 0a 58 20 2a |README f|ile..X *|
|000005c0| 0a 58 20 2a 20 54 68 69 | 73 20 66 69 6c 65 20 63 |.X * Thi|s file c|
|000005d0| 6f 6e 74 61 69 6e 73 20 | 72 6f 75 74 69 6e 65 73 |ontains |routines|
|000005e0| 20 74 6f 20 72 65 61 64 | 20 69 6e 70 75 74 20 69 | to read| input i|
|000005f0| 6d 61 67 65 73 20 69 6e | 20 4d 69 63 72 6f 73 6f |mages in| Microso|
|00000600| 66 74 20 22 42 4d 50 22 | 0a 58 20 2a 20 66 6f 72 |ft "BMP"|.X * for|
|00000610| 6d 61 74 20 28 4d 53 20 | 57 69 6e 64 6f 77 73 20 |mat (MS |Windows |
|00000620| 33 2e 78 2c 20 4f 53 2f | 32 20 31 2e 78 2c 20 61 |3.x, OS/|2 1.x, a|
|00000630| 6e 64 20 4f 53 2f 32 20 | 32 2e 78 20 66 6c 61 76 |nd OS/2 |2.x flav|
|00000640| 6f 72 73 29 2e 0a 58 20 | 2a 20 43 75 72 72 65 6e |ors)..X |* Curren|
|00000650| 74 6c 79 2c 20 6f 6e 6c | 79 20 38 2d 62 69 74 20 |tly, onl|y 8-bit |
|00000660| 61 6e 64 20 32 34 2d 62 | 69 74 20 69 6d 61 67 65 |and 24-b|it image|
|00000670| 73 20 61 72 65 20 73 75 | 70 70 6f 72 74 65 64 2c |s are su|pported,|
|00000680| 20 6e 6f 74 20 31 2d 62 | 69 74 20 6f 72 0a 58 20 | not 1-b|it or.X |
|00000690| 2a 20 34 2d 62 69 74 20 | 28 66 65 65 64 69 6e 67 |* 4-bit |(feeding|
|000006a0| 20 73 75 63 68 20 6c 6f | 77 2d 64 65 70 74 68 20 | such lo|w-depth |
|000006b0| 69 6d 61 67 65 73 20 69 | 6e 74 6f 20 4a 50 45 47 |images i|nto JPEG|
|000006c0| 20 77 6f 75 6c 64 20 62 | 65 20 73 69 6c 6c 79 20 | would b|e silly |
|000006d0| 61 6e 79 77 61 79 29 2e | 0a 58 20 2a 20 41 6c 73 |anyway).|.X * Als|
|000006e0| 6f 2c 20 77 65 20 64 6f | 6e 27 74 20 73 75 70 70 |o, we do|n't supp|
|000006f0| 6f 72 74 20 52 4c 45 2d | 63 6f 6d 70 72 65 73 73 |ort RLE-|compress|
|00000700| 65 64 20 66 69 6c 65 73 | 2e 0a 58 20 2a 0a 58 20 |ed files|..X *.X |
|00000710| 2a 20 54 68 65 73 65 20 | 72 6f 75 74 69 6e 65 73 |* These |routines|
|00000720| 20 6d 61 79 20 6e 65 65 | 64 20 6d 6f 64 69 66 69 | may nee|d modifi|
|00000730| 63 61 74 69 6f 6e 20 66 | 6f 72 20 6e 6f 6e 2d 55 |cation f|or non-U|
|00000740| 6e 69 78 20 65 6e 76 69 | 72 6f 6e 6d 65 6e 74 73 |nix envi|ronments|
|00000750| 20 6f 72 0a 58 20 2a 20 | 73 70 65 63 69 61 6c 69 | or.X * |speciali|
|00000760| 7a 65 64 20 61 70 70 6c | 69 63 61 74 69 6f 6e 73 |zed appl|ications|
|00000770| 2e 20 20 41 73 20 74 68 | 65 79 20 73 74 61 6e 64 |. As th|ey stand|
|00000780| 2c 20 74 68 65 79 20 61 | 73 73 75 6d 65 20 69 6e |, they a|ssume in|
|00000790| 70 75 74 20 66 72 6f 6d | 0a 58 20 2a 20 61 6e 20 |put from|.X * an |
|000007a0| 6f 72 64 69 6e 61 72 79 | 20 73 74 64 69 6f 20 73 |ordinary| stdio s|
|000007b0| 74 72 65 61 6d 2e 20 20 | 54 68 65 79 20 66 75 72 |tream. |They fur|
|000007c0| 74 68 65 72 20 61 73 73 | 75 6d 65 20 74 68 61 74 |ther ass|ume that|
|000007d0| 20 72 65 61 64 69 6e 67 | 20 62 65 67 69 6e 73 0a | reading| begins.|
|000007e0| 58 20 2a 20 61 74 20 74 | 68 65 20 73 74 61 72 74 |X * at t|he start|
|000007f0| 20 6f 66 20 74 68 65 20 | 66 69 6c 65 3b 20 73 74 | of the |file; st|
|00000800| 61 72 74 5f 69 6e 70 75 | 74 20 6d 61 79 20 6e 65 |art_inpu|t may ne|
|00000810| 65 64 20 77 6f 72 6b 20 | 69 66 20 74 68 65 0a 58 |ed work |if the.X|
|00000820| 20 2a 20 75 73 65 72 20 | 69 6e 74 65 72 66 61 63 | * user |interfac|
|00000830| 65 20 68 61 73 20 61 6c | 72 65 61 64 79 20 72 65 |e has al|ready re|
|00000840| 61 64 20 73 6f 6d 65 20 | 64 61 74 61 20 28 65 2e |ad some |data (e.|
|00000850| 67 2e 2c 20 74 6f 20 64 | 65 74 65 72 6d 69 6e 65 |g., to d|etermine|
|00000860| 20 74 68 61 74 0a 58 20 | 2a 20 74 68 65 20 66 69 | that.X |* the fi|
|00000870| 6c 65 20 69 73 20 69 6e | 64 65 65 64 20 42 4d 50 |le is in|deed BMP|
|00000880| 20 66 6f 72 6d 61 74 29 | 2e 0a 58 20 2a 0a 58 20 | format)|..X *.X |
|00000890| 2a 20 54 68 69 73 20 63 | 6f 64 65 20 63 6f 6e 74 |* This c|ode cont|
|000008a0| 72 69 62 75 74 65 64 20 | 62 79 20 4a 61 6d 65 73 |ributed |by James|
|000008b0| 20 41 72 74 68 75 72 20 | 42 6f 75 63 68 65 72 2e | Arthur |Boucher.|
|000008c0| 0a 58 20 2a 2f 0a 58 0a | 58 23 69 6e 63 6c 75 64 |.X */.X.|X#includ|
|000008d0| 65 20 22 63 64 6a 70 65 | 67 2e 68 22 09 09 2f 2a |e "cdjpe|g.h"../*|
|000008e0| 20 43 6f 6d 6d 6f 6e 20 | 64 65 63 6c 73 20 66 6f | Common |decls fo|
|000008f0| 72 20 63 6a 70 65 67 2f | 64 6a 70 65 67 20 61 70 |r cjpeg/|djpeg ap|
|00000900| 70 6c 69 63 61 74 69 6f | 6e 73 20 2a 2f 0a 58 0a |plicatio|ns */.X.|
|00000910| 58 23 69 66 64 65 66 20 | 42 4d 50 5f 53 55 50 50 |X#ifdef |BMP_SUPP|
|00000920| 4f 52 54 45 44 0a 58 0a | 58 0a 58 2f 2a 20 4d 61 |ORTED.X.|X.X/* Ma|
|00000930| 63 72 6f 73 20 74 6f 20 | 64 65 61 6c 20 77 69 74 |cros to |deal wit|
|00000940| 68 20 75 6e 73 69 67 6e | 65 64 20 63 68 61 72 73 |h unsign|ed chars|
|00000950| 20 61 73 20 65 66 66 69 | 63 69 65 6e 74 6c 79 20 | as effi|ciently |
|00000960| 61 73 20 63 6f 6d 70 69 | 6c 65 72 20 61 6c 6c 6f |as compi|ler allo|
|00000970| 77 73 20 2a 2f 0a 58 0a | 58 23 69 66 64 65 66 20 |ws */.X.|X#ifdef |
|00000980| 48 41 56 45 5f 55 4e 53 | 49 47 4e 45 44 5f 43 48 |HAVE_UNS|IGNED_CH|
|00000990| 41 52 0a 58 74 79 70 65 | 64 65 66 20 75 6e 73 69 |AR.Xtype|def unsi|
|000009a0| 67 6e 65 64 20 63 68 61 | 72 20 55 5f 43 48 41 52 |gned cha|r U_CHAR|
|000009b0| 3b 0a 58 23 64 65 66 69 | 6e 65 20 55 43 48 28 78 |;.X#defi|ne UCH(x|
|000009c0| 29 09 28 28 69 6e 74 29 | 20 28 78 29 29 0a 58 23 |).((int)| (x)).X#|
|000009d0| 65 6c 73 65 20 2f 2a 20 | 21 48 41 56 45 5f 55 4e |else /* |!HAVE_UN|
|000009e0| 53 49 47 4e 45 44 5f 43 | 48 41 52 20 2a 2f 0a 58 |SIGNED_C|HAR */.X|
|000009f0| 23 69 66 64 65 66 20 43 | 48 41 52 5f 49 53 5f 55 |#ifdef C|HAR_IS_U|
|00000a00| 4e 53 49 47 4e 45 44 0a | 58 74 79 70 65 64 65 66 |NSIGNED.|Xtypedef|
|00000a10| 20 63 68 61 72 20 55 5f | 43 48 41 52 3b 0a 58 23 | char U_|CHAR;.X#|
|00000a20| 64 65 66 69 6e 65 20 55 | 43 48 28 78 29 09 28 28 |define U|CH(x).((|
|00000a30| 69 6e 74 29 20 28 78 29 | 29 0a 58 23 65 6c 73 65 |int) (x)|).X#else|
|00000a40| 0a 58 74 79 70 65 64 65 | 66 20 63 68 61 72 20 55 |.Xtypede|f char U|
|00000a50| 5f 43 48 41 52 3b 0a 58 | 23 64 65 66 69 6e 65 20 |_CHAR;.X|#define |
|00000a60| 55 43 48 28 78 29 09 28 | 28 69 6e 74 29 20 28 78 |UCH(x).(|(int) (x|
|00000a70| 29 20 26 20 30 78 46 46 | 29 0a 58 23 65 6e 64 69 |) & 0xFF|).X#endi|
|00000a80| 66 0a 58 23 65 6e 64 69 | 66 20 2f 2a 20 48 41 56 |f.X#endi|f /* HAV|
|00000a90| 45 5f 55 4e 53 49 47 4e | 45 44 5f 43 48 41 52 20 |E_UNSIGN|ED_CHAR |
|00000aa0| 2a 2f 0a 58 0a 58 0a 58 | 23 64 65 66 69 6e 65 09 |*/.X.X.X|#define.|
|00000ab0| 52 65 61 64 4f 4b 28 66 | 69 6c 65 2c 62 75 66 66 |ReadOK(f|ile,buff|
|00000ac0| 65 72 2c 6c 65 6e 29 09 | 28 4a 46 52 45 41 44 28 |er,len).|(JFREAD(|
|00000ad0| 66 69 6c 65 2c 62 75 66 | 66 65 72 2c 6c 65 6e 29 |file,buf|fer,len)|
|00000ae0| 20 3d 3d 20 28 28 73 69 | 7a 65 5f 74 29 20 28 6c | == ((si|ze_t) (l|
|00000af0| 65 6e 29 29 29 0a 58 0a | 58 0a 58 2f 2a 20 50 72 |en))).X.|X.X/* Pr|
|00000b00| 69 76 61 74 65 20 76 65 | 72 73 69 6f 6e 20 6f 66 |ivate ve|rsion of|
|00000b10| 20 64 61 74 61 20 73 6f | 75 72 63 65 20 6f 62 6a | data so|urce obj|
|00000b20| 65 63 74 20 2a 2f 0a 58 | 0a 58 74 79 70 65 64 65 |ect */.X|.Xtypede|
|00000b30| 66 20 73 74 72 75 63 74 | 20 5f 62 6d 70 5f 73 6f |f struct| _bmp_so|
|00000b40| 75 72 63 65 5f 73 74 72 | 75 63 74 20 2a 20 62 6d |urce_str|uct * bm|
|00000b50| 70 5f 73 6f 75 72 63 65 | 5f 70 74 72 3b 0a 58 0a |p_source|_ptr;.X.|
|00000b60| 58 74 79 70 65 64 65 66 | 20 73 74 72 75 63 74 20 |Xtypedef| struct |
|00000b70| 5f 62 6d 70 5f 73 6f 75 | 72 63 65 5f 73 74 72 75 |_bmp_sou|rce_stru|
|00000b80| 63 74 20 7b 0a 58 20 20 | 73 74 72 75 63 74 20 63 |ct {.X |struct c|
|00000b90| 6a 70 65 67 5f 73 6f 75 | 72 63 65 5f 73 74 72 75 |jpeg_sou|rce_stru|
|00000ba0| 63 74 20 70 75 62 3b 20 | 2f 2a 20 70 75 62 6c 69 |ct pub; |/* publi|
|00000bb0| 63 20 66 69 65 6c 64 73 | 20 2a 2f 0a 58 0a 58 20 |c fields| */.X.X |
|00000bc0| 20 6a 5f 63 6f 6d 70 72 | 65 73 73 5f 70 74 72 20 | j_compr|ess_ptr |
|00000bd0| 63 69 6e 66 6f 3b 09 09 | 2f 2a 20 62 61 63 6b 20 |cinfo;..|/* back |
|00000be0| 6c 69 6e 6b 20 73 61 76 | 65 73 20 70 61 73 73 69 |link sav|es passi|
|00000bf0| 6e 67 20 73 65 70 61 72 | 61 74 65 20 70 61 72 6d |ng separ|ate parm|
|00000c00| 20 2a 2f 0a 58 0a 58 20 | 20 4a 53 41 4d 50 41 52 | */.X.X | JSAMPAR|
|00000c10| 52 41 59 20 63 6f 6c 6f | 72 6d 61 70 3b 09 09 2f |RAY colo|rmap;../|
|00000c20| 2a 20 42 4d 50 20 63 6f | 6c 6f 72 6d 61 70 20 28 |* BMP co|lormap (|
|00000c30| 63 6f 6e 76 65 72 74 65 | 64 20 74 6f 20 6d 79 20 |converte|d to my |
|00000c40| 66 6f 72 6d 61 74 29 20 | 2a 2f 0a 58 0a 58 20 20 |format) |*/.X.X |
|00000c50| 6a 76 69 72 74 5f 73 61 | 72 72 61 79 5f 70 74 72 |jvirt_sa|rray_ptr|
|00000c60| 20 77 68 6f 6c 65 5f 69 | 6d 61 67 65 3b 09 2f 2a | whole_i|mage;./*|
|00000c70| 20 4e 65 65 64 65 64 20 | 74 6f 20 72 65 76 65 72 | Needed |to rever|
|00000c80| 73 65 20 72 6f 77 20 6f | 72 64 65 72 20 2a 2f 0a |se row o|rder */.|
|00000c90| 58 20 20 4a 44 49 4d 45 | 4e 53 49 4f 4e 20 73 6f |X JDIME|NSION so|
|00000ca0| 75 72 63 65 5f 72 6f 77 | 3b 09 2f 2a 20 43 75 72 |urce_row|;./* Cur|
|00000cb0| 72 65 6e 74 20 73 6f 75 | 72 63 65 20 72 6f 77 20 |rent sou|rce row |
|00000cc0| 6e 75 6d 62 65 72 20 2a | 2f 0a 58 20 20 4a 44 49 |number *|/.X JDI|
|00000cd0| 4d 45 4e 53 49 4f 4e 20 | 72 6f 77 5f 77 69 64 74 |MENSION |row_widt|
|00000ce0| 68 3b 09 09 2f 2a 20 50 | 68 79 73 69 63 61 6c 20 |h;../* P|hysical |
|00000cf0| 77 69 64 74 68 20 6f 66 | 20 73 63 61 6e 6c 69 6e |width of| scanlin|
|00000d00| 65 73 20 69 6e 20 66 69 | 6c 65 20 2a 2f 0a 58 0a |es in fi|le */.X.|
|00000d10| 58 20 20 69 6e 74 20 62 | 69 74 73 5f 70 65 72 5f |X int b|its_per_|
|00000d20| 70 69 78 65 6c 3b 09 09 | 2f 2a 20 72 65 6d 65 6d |pixel;..|/* remem|
|00000d30| 62 65 72 73 20 38 2d 20 | 6f 72 20 32 34 2d 62 69 |bers 8- |or 24-bi|
|00000d40| 74 20 66 6f 72 6d 61 74 | 20 2a 2f 0a 58 7d 20 62 |t format| */.X} b|
|00000d50| 6d 70 5f 73 6f 75 72 63 | 65 5f 73 74 72 75 63 74 |mp_sourc|e_struct|
|00000d60| 3b 0a 58 0a 58 0a 58 4c | 4f 43 41 4c 20 69 6e 74 |;.X.X.XL|OCAL int|
|00000d70| 0a 58 72 65 61 64 5f 62 | 79 74 65 20 28 62 6d 70 |.Xread_b|yte (bmp|
|00000d80| 5f 73 6f 75 72 63 65 5f | 70 74 72 20 73 69 6e 66 |_source_|ptr sinf|
|00000d90| 6f 29 0a 58 2f 2a 20 52 | 65 61 64 20 6e 65 78 74 |o).X/* R|ead next|
|00000da0| 20 62 79 74 65 20 66 72 | 6f 6d 20 42 4d 50 20 66 | byte fr|om BMP f|
|00000db0| 69 6c 65 20 2a 2f 0a 58 | 7b 0a 58 20 20 72 65 67 |ile */.X|{.X reg|
|00000dc0| 69 73 74 65 72 20 46 49 | 4c 45 20 2a 69 6e 66 69 |ister FI|LE *infi|
|00000dd0| 6c 65 20 3d 20 73 69 6e | 66 6f 2d 3e 70 75 62 2e |le = sin|fo->pub.|
|00000de0| 69 6e 70 75 74 5f 66 69 | 6c 65 3b 0a 58 20 20 72 |input_fi|le;.X r|
|00000df0| 65 67 69 73 74 65 72 20 | 69 6e 74 20 63 3b 0a 58 |egister |int c;.X|
|00000e00| 0a 58 20 20 69 66 20 28 | 28 63 20 3d 20 67 65 74 |.X if (|(c = get|
|00000e10| 63 28 69 6e 66 69 6c 65 | 29 29 20 3d 3d 20 45 4f |c(infile|)) == EO|
|00000e20| 46 29 0a 58 20 20 20 20 | 45 52 52 45 58 49 54 28 |F).X |ERREXIT(|
|00000e30| 73 69 6e 66 6f 2d 3e 63 | 69 6e 66 6f 2c 20 4a 45 |sinfo->c|info, JE|
|00000e40| 52 52 5f 49 4e 50 55 54 | 5f 45 4f 46 29 3b 0a 58 |RR_INPUT|_EOF);.X|
|00000e50| 20 20 72 65 74 75 72 6e | 20 63 3b 0a 58 7d 0a 58 | return| c;.X}.X|
|00000e60| 0a 58 0a 58 4c 4f 43 41 | 4c 20 76 6f 69 64 0a 58 |.X.XLOCA|L void.X|
|00000e70| 72 65 61 64 5f 63 6f 6c | 6f 72 6d 61 70 20 28 62 |read_col|ormap (b|
|00000e80| 6d 70 5f 73 6f 75 72 63 | 65 5f 70 74 72 20 73 69 |mp_sourc|e_ptr si|
|00000e90| 6e 66 6f 2c 20 69 6e 74 | 20 63 6d 61 70 6c 65 6e |nfo, int| cmaplen|
|00000ea0| 2c 20 69 6e 74 20 6d 61 | 70 65 6e 74 72 79 73 69 |, int ma|pentrysi|
|00000eb0| 7a 65 29 0a 58 2f 2a 20 | 52 65 61 64 20 74 68 65 |ze).X/* |Read the|
|00000ec0| 20 63 6f 6c 6f 72 6d 61 | 70 20 66 72 6f 6d 20 61 | colorma|p from a|
|00000ed0| 20 42 4d 50 20 66 69 6c | 65 20 2a 2f 0a 58 7b 0a | BMP fil|e */.X{.|
|00000ee0| 58 20 20 69 6e 74 20 69 | 3b 0a 58 0a 58 20 20 73 |X int i|;.X.X s|
|00000ef0| 77 69 74 63 68 20 28 6d | 61 70 65 6e 74 72 79 73 |witch (m|apentrys|
|00000f00| 69 7a 65 29 20 7b 0a 58 | 20 20 63 61 73 65 20 33 |ize) {.X| case 3|
|00000f10| 3a 0a 58 20 20 20 20 2f | 2a 20 42 47 52 20 66 6f |:.X /|* BGR fo|
|00000f20| 72 6d 61 74 20 28 6f 63 | 63 75 72 73 20 69 6e 20 |rmat (oc|curs in |
|00000f30| 4f 53 2f 32 20 66 69 6c | 65 73 29 20 2a 2f 0a 58 |OS/2 fil|es) */.X|
|00000f40| 20 20 20 20 66 6f 72 20 | 28 69 20 3d 20 30 3b 20 | for |(i = 0; |
|00000f50| 69 20 3c 20 63 6d 61 70 | 6c 65 6e 3b 20 69 2b 2b |i < cmap|len; i++|
|00000f60| 29 20 7b 0a 58 20 20 20 | 20 20 20 73 69 6e 66 6f |) {.X | sinfo|
|00000f70| 2d 3e 63 6f 6c 6f 72 6d | 61 70 5b 32 5d 5b 69 5d |->colorm|ap[2][i]|
|00000f80| 20 3d 20 28 4a 53 41 4d | 50 4c 45 29 20 72 65 61 | = (JSAM|PLE) rea|
|00000f90| 64 5f 62 79 74 65 28 73 | 69 6e 66 6f 29 3b 0a 58 |d_byte(s|info);.X|
|00000fa0| 20 20 20 20 20 20 73 69 | 6e 66 6f 2d 3e 63 6f 6c | si|nfo->col|
|00000fb0| 6f 72 6d 61 70 5b 31 5d | 5b 69 5d 20 3d 20 28 4a |ormap[1]|[i] = (J|
|00000fc0| 53 41 4d 50 4c 45 29 20 | 72 65 61 64 5f 62 79 74 |SAMPLE) |read_byt|
|00000fd0| 65 28 73 69 6e 66 6f 29 | 3b 0a 58 20 20 20 20 20 |e(sinfo)|;.X |
|00000fe0| 20 73 69 6e 66 6f 2d 3e | 63 6f 6c 6f 72 6d 61 70 | sinfo->|colormap|
|00000ff0| 5b 30 5d 5b 69 5d 20 3d | 20 28 4a 53 41 4d 50 4c |[0][i] =| (JSAMPL|
|00001000| 45 29 20 72 65 61 64 5f | 62 79 74 65 28 73 69 6e |E) read_|byte(sin|
|00001010| 66 6f 29 3b 0a 58 20 20 | 20 20 7d 0a 58 20 20 20 |fo);.X | }.X |
|00001020| 20 62 72 65 61 6b 3b 0a | 58 20 20 63 61 73 65 20 | break;.|X case |
|00001030| 34 3a 0a 58 20 20 20 20 | 2f 2a 20 42 47 52 30 20 |4:.X |/* BGR0 |
|00001040| 66 6f 72 6d 61 74 20 28 | 6f 63 63 75 72 73 20 69 |format (|occurs i|
|00001050| 6e 20 4d 53 20 57 69 6e | 64 6f 77 73 20 66 69 6c |n MS Win|dows fil|
|00001060| 65 73 29 20 2a 2f 0a 58 | 20 20 20 20 66 6f 72 20 |es) */.X| for |
|00001070| 28 69 20 3d 20 30 3b 20 | 69 20 3c 20 63 6d 61 70 |(i = 0; |i < cmap|
|00001080| 6c 65 6e 3b 20 69 2b 2b | 29 20 7b 0a 58 20 20 20 |len; i++|) {.X |
|00001090| 20 20 20 73 69 6e 66 6f | 2d 3e 63 6f 6c 6f 72 6d | sinfo|->colorm|
|000010a0| 61 70 5b 32 5d 5b 69 5d | 20 3d 20 28 4a 53 41 4d |ap[2][i]| = (JSAM|
|000010b0| 50 4c 45 29 20 72 65 61 | 64 5f 62 79 74 65 28 73 |PLE) rea|d_byte(s|
|000010c0| 69 6e 66 6f 29 3b 0a 58 | 20 20 20 20 20 20 73 69 |info);.X| si|
|000010d0| 6e 66 6f 2d 3e 63 6f 6c | 6f 72 6d 61 70 5b 31 5d |nfo->col|ormap[1]|
|000010e0| 5b 69 5d 20 3d 20 28 4a | 53 41 4d 50 4c 45 29 20 |[i] = (J|SAMPLE) |
|000010f0| 72 65 61 64 5f 62 79 74 | 65 28 73 69 6e 66 6f 29 |read_byt|e(sinfo)|
|00001100| 3b 0a 58 20 20 20 20 20 | 20 73 69 6e 66 6f 2d 3e |;.X | sinfo->|
|00001110| 63 6f 6c 6f 72 6d 61 70 | 5b 30 5d 5b 69 5d 20 3d |colormap|[0][i] =|
|00001120| 20 28 4a 53 41 4d 50 4c | 45 29 20 72 65 61 64 5f | (JSAMPL|E) read_|
|00001130| 62 79 74 65 28 73 69 6e | 66 6f 29 3b 0a 58 20 20 |byte(sin|fo);.X |
|00001140| 20 20 20 20 28 76 6f 69 | 64 29 20 72 65 61 64 5f | (voi|d) read_|
|00001150| 62 79 74 65 28 73 69 6e | 66 6f 29 3b 0a 58 20 20 |byte(sin|fo);.X |
|00001160| 20 20 7d 0a 58 20 20 20 | 20 62 72 65 61 6b 3b 0a | }.X | break;.|
|00001170| 58 20 20 64 65 66 61 75 | 6c 74 3a 0a 58 20 20 20 |X defau|lt:.X |
|00001180| 20 45 52 52 45 58 49 54 | 28 73 69 6e 66 6f 2d 3e | ERREXIT|(sinfo->|
|00001190| 63 69 6e 66 6f 2c 20 4a | 45 52 52 5f 42 4d 50 5f |cinfo, J|ERR_BMP_|
|000011a0| 42 41 44 43 4d 41 50 29 | 3b 0a 58 20 20 20 20 62 |BADCMAP)|;.X b|
|000011b0| 72 65 61 6b 3b 0a 58 20 | 20 7d 0a 58 7d 0a 58 0a |reak;.X | }.X}.X.|
|000011c0| 58 0a 58 2f 2a 0a 58 20 | 2a 20 52 65 61 64 20 6f |X.X/*.X |* Read o|
|000011d0| 6e 65 20 72 6f 77 20 6f | 66 20 70 69 78 65 6c 73 |ne row o|f pixels|
|000011e0| 2e 0a 58 20 2a 20 54 68 | 65 20 69 6d 61 67 65 20 |..X * Th|e image |
|000011f0| 68 61 73 20 62 65 65 6e | 20 72 65 61 64 20 69 6e |has been| read in|
|00001200| 74 6f 20 74 68 65 20 77 | 68 6f 6c 65 5f 69 6d 61 |to the w|hole_ima|
|00001210| 67 65 20 61 72 72 61 79 | 2c 20 62 75 74 20 69 73 |ge array|, but is|
|00001220| 20 6f 74 68 65 72 77 69 | 73 65 0a 58 20 2a 20 75 | otherwi|se.X * u|
|00001230| 6e 70 72 6f 63 65 73 73 | 65 64 2e 20 20 57 65 20 |nprocess|ed. We |
|00001240| 6d 75 73 74 20 72 65 61 | 64 20 69 74 20 6f 75 74 |must rea|d it out|
|00001250| 20 69 6e 20 74 6f 70 2d | 74 6f 2d 62 6f 74 74 6f | in top-|to-botto|
|00001260| 6d 20 72 6f 77 20 6f 72 | 64 65 72 2c 20 61 6e 64 |m row or|der, and|
|00001270| 20 69 66 0a 58 20 2a 20 | 69 74 20 69 73 20 61 6e | if.X * |it is an|
|00001280| 20 38 2d 62 69 74 20 69 | 6d 61 67 65 2c 20 77 65 | 8-bit i|mage, we|
|00001290| 20 6d 75 73 74 20 65 78 | 70 61 6e 64 20 63 6f 6c | must ex|pand col|
|000012a0| 6f 72 6d 61 70 70 65 64 | 20 70 69 78 65 6c 73 20 |ormapped| pixels |
|000012b0| 74 6f 20 32 34 62 69 74 | 20 66 6f 72 6d 61 74 2e |to 24bit| format.|
|000012c0| 0a 58 20 2a 2f 0a 58 0a | 58 4d 45 54 48 4f 44 44 |.X */.X.|XMETHODD|
|000012d0| 45 46 20 4a 44 49 4d 45 | 4e 53 49 4f 4e 0a 58 67 |EF JDIME|NSION.Xg|
|000012e0| 65 74 5f 38 62 69 74 5f | 72 6f 77 20 28 6a 5f 63 |et_8bit_|row (j_c|
|000012f0| 6f 6d 70 72 65 73 73 5f | 70 74 72 20 63 69 6e 66 |ompress_|ptr cinf|
|00001300| 6f 2c 20 63 6a 70 65 67 | 5f 73 6f 75 72 63 65 5f |o, cjpeg|_source_|
|00001310| 70 74 72 20 73 69 6e 66 | 6f 29 0a 58 2f 2a 20 54 |ptr sinf|o).X/* T|
|00001320| 68 69 73 20 76 65 72 73 | 69 6f 6e 20 69 73 20 66 |his vers|ion is f|
|00001330| 6f 72 20 72 65 61 64 69 | 6e 67 20 38 2d 62 69 74 |or readi|ng 8-bit|
|00001340| 20 63 6f 6c 6f 72 6d 61 | 70 20 69 6e 64 65 78 65 | colorma|p indexe|
|00001350| 73 20 2a 2f 0a 58 7b 0a | 58 20 20 62 6d 70 5f 73 |s */.X{.|X bmp_s|
|00001360| 6f 75 72 63 65 5f 70 74 | 72 20 73 6f 75 72 63 65 |ource_pt|r source|
|00001370| 20 3d 20 28 62 6d 70 5f | 73 6f 75 72 63 65 5f 70 | = (bmp_|source_p|
|00001380| 74 72 29 20 73 69 6e 66 | 6f 3b 0a 58 20 20 72 65 |tr) sinf|o;.X re|
|00001390| 67 69 73 74 65 72 20 4a | 53 41 4d 50 41 52 52 41 |gister J|SAMPARRA|
|000013a0| 59 20 63 6f 6c 6f 72 6d | 61 70 20 3d 20 73 6f 75 |Y colorm|ap = sou|
|000013b0| 72 63 65 2d 3e 63 6f 6c | 6f 72 6d 61 70 3b 0a 58 |rce->col|ormap;.X|
|000013c0| 20 20 4a 53 41 4d 50 41 | 52 52 41 59 20 69 6d 61 | JSAMPA|RRAY ima|
|000013d0| 67 65 5f 70 74 72 3b 0a | 58 20 20 72 65 67 69 73 |ge_ptr;.|X regis|
|000013e0| 74 65 72 20 69 6e 74 20 | 74 3b 0a 58 20 20 72 65 |ter int |t;.X re|
|000013f0| 67 69 73 74 65 72 20 4a | 53 41 4d 50 52 4f 57 20 |gister J|SAMPROW |
|00001400| 69 6e 70 74 72 2c 20 6f | 75 74 70 74 72 3b 0a 58 |inptr, o|utptr;.X|
|00001410| 20 20 72 65 67 69 73 74 | 65 72 20 4a 44 49 4d 45 | regist|er JDIME|
|00001420| 4e 53 49 4f 4e 20 63 6f | 6c 3b 0a 58 0a 58 20 20 |NSION co|l;.X.X |
|00001430| 2f 2a 20 46 65 74 63 68 | 20 6e 65 78 74 20 72 6f |/* Fetch| next ro|
|00001440| 77 20 66 72 6f 6d 20 76 | 69 72 74 75 61 6c 20 61 |w from v|irtual a|
|00001450| 72 72 61 79 20 2a 2f 0a | 58 20 20 73 6f 75 72 63 |rray */.|X sourc|
|00001460| 65 2d 3e 73 6f 75 72 63 | 65 5f 72 6f 77 2d 2d 3b |e->sourc|e_row--;|
|00001470| 0a 58 20 20 69 6d 61 67 | 65 5f 70 74 72 20 3d 20 |.X imag|e_ptr = |
|00001480| 28 2a 63 69 6e 66 6f 2d | 3e 6d 65 6d 2d 3e 61 63 |(*cinfo-|>mem->ac|
|00001490| 63 65 73 73 5f 76 69 72 | 74 5f 73 61 72 72 61 79 |cess_vir|t_sarray|
|000014a0| 29 0a 58 20 20 20 20 28 | 28 6a 5f 63 6f 6d 6d 6f |).X (|(j_commo|
|000014b0| 6e 5f 70 74 72 29 20 63 | 69 6e 66 6f 2c 20 73 6f |n_ptr) c|info, so|
|000014c0| 75 72 63 65 2d 3e 77 68 | 6f 6c 65 5f 69 6d 61 67 |urce->wh|ole_imag|
|000014d0| 65 2c 20 73 6f 75 72 63 | 65 2d 3e 73 6f 75 72 63 |e, sourc|e->sourc|
|000014e0| 65 5f 72 6f 77 2c 20 46 | 41 4c 53 45 29 3b 0a 58 |e_row, F|ALSE);.X|
|000014f0| 0a 58 20 20 2f 2a 20 45 | 78 70 61 6e 64 20 74 68 |.X /* E|xpand th|
|00001500| 65 20 63 6f 6c 6f 72 6d | 61 70 20 69 6e 64 65 78 |e colorm|ap index|
|00001510| 65 73 20 74 6f 20 72 65 | 61 6c 20 64 61 74 61 20 |es to re|al data |
|00001520| 2a 2f 0a 58 20 20 69 6e | 70 74 72 20 3d 20 69 6d |*/.X in|ptr = im|
|00001530| 61 67 65 5f 70 74 72 5b | 30 5d 3b 0a 58 20 20 6f |age_ptr[|0];.X o|
|00001540| 75 74 70 74 72 20 3d 20 | 73 6f 75 72 63 65 2d 3e |utptr = |source->|
|00001550| 70 75 62 2e 62 75 66 66 | 65 72 5b 30 5d 3b 0a 58 |pub.buff|er[0];.X|
|00001560| 20 20 66 6f 72 20 28 63 | 6f 6c 20 3d 20 63 69 6e | for (c|ol = cin|
|00001570| 66 6f 2d 3e 69 6d 61 67 | 65 5f 77 69 64 74 68 3b |fo->imag|e_width;|
|00001580| 20 63 6f 6c 20 3e 20 30 | 3b 20 63 6f 6c 2d 2d 29 | col > 0|; col--)|
|00001590| 20 7b 0a 58 20 20 20 20 | 74 20 3d 20 47 45 54 4a | {.X |t = GETJ|
|000015a0| 53 41 4d 50 4c 45 28 2a | 69 6e 70 74 72 2b 2b 29 |SAMPLE(*|inptr++)|
|000015b0| 3b 0a 58 20 20 20 20 2a | 6f 75 74 70 74 72 2b 2b |;.X *|outptr++|
|000015c0| 20 3d 20 63 6f 6c 6f 72 | 6d 61 70 5b 30 5d 5b 74 | = color|map[0][t|
|000015d0| 5d 3b 09 2f 2a 20 63 61 | 6e 20 6f 6d 69 74 20 47 |];./* ca|n omit G|
|000015e0| 45 54 4a 53 41 4d 50 4c | 45 28 29 20 73 61 66 65 |ETJSAMPL|E() safe|
|000015f0| 6c 79 20 2a 2f 0a 58 20 | 20 20 20 2a 6f 75 74 70 |ly */.X | *outp|
|00001600| 74 72 2b 2b 20 3d 20 63 | 6f 6c 6f 72 6d 61 70 5b |tr++ = c|olormap[|
|00001610| 31 5d 5b 74 5d 3b 0a 58 | 20 20 20 20 2a 6f 75 74 |1][t];.X| *out|
|00001620| 70 74 72 2b 2b 20 3d 20 | 63 6f 6c 6f 72 6d 61 70 |ptr++ = |colormap|
|00001630| 5b 32 5d 5b 74 5d 3b 0a | 58 20 20 7d 0a 58 0a 58 |[2][t];.|X }.X.X|
|00001640| 20 20 72 65 74 75 72 6e | 20 31 3b 0a 58 7d 0a 58 | return| 1;.X}.X|
|00001650| 0a 58 0a 58 4d 45 54 48 | 4f 44 44 45 46 20 4a 44 |.X.XMETH|ODDEF JD|
|00001660| 49 4d 45 4e 53 49 4f 4e | 0a 58 67 65 74 5f 32 34 |IMENSION|.Xget_24|
|00001670| 62 69 74 5f 72 6f 77 20 | 28 6a 5f 63 6f 6d 70 72 |bit_row |(j_compr|
|00001680| 65 73 73 5f 70 74 72 20 | 63 69 6e 66 6f 2c 20 63 |ess_ptr |cinfo, c|
|00001690| 6a 70 65 67 5f 73 6f 75 | 72 63 65 5f 70 74 72 20 |jpeg_sou|rce_ptr |
|000016a0| 73 69 6e 66 6f 29 0a 58 | 2f 2a 20 54 68 69 73 20 |sinfo).X|/* This |
|000016b0| 76 65 72 73 69 6f 6e 20 | 69 73 20 66 6f 72 20 72 |version |is for r|
|000016c0| 65 61 64 69 6e 67 20 32 | 34 2d 62 69 74 20 70 69 |eading 2|4-bit pi|
|000016d0| 78 65 6c 73 20 2a 2f 0a | 58 7b 0a 58 20 20 62 6d |xels */.|X{.X bm|
|000016e0| 70 5f 73 6f 75 72 63 65 | 5f 70 74 72 20 73 6f 75 |p_source|_ptr sou|
|000016f0| 72 63 65 20 3d 20 28 62 | 6d 70 5f 73 6f 75 72 63 |rce = (b|mp_sourc|
|00001700| 65 5f 70 74 72 29 20 73 | 69 6e 66 6f 3b 0a 58 20 |e_ptr) s|info;.X |
|00001710| 20 4a 53 41 4d 50 41 52 | 52 41 59 20 69 6d 61 67 | JSAMPAR|RAY imag|
|00001720| 65 5f 70 74 72 3b 0a 58 | 20 20 72 65 67 69 73 74 |e_ptr;.X| regist|
|00001730| 65 72 20 4a 53 41 4d 50 | 52 4f 57 20 69 6e 70 74 |er JSAMP|ROW inpt|
|00001740| 72 2c 20 6f 75 74 70 74 | 72 3b 0a 58 20 20 72 65 |r, outpt|r;.X re|
|00001750| 67 69 73 74 65 72 20 4a | 44 49 4d 45 4e 53 49 4f |gister J|DIMENSIO|
|00001760| 4e 20 63 6f 6c 3b 0a 58 | 0a 58 20 20 2f 2a 20 46 |N col;.X|.X /* F|
|00001770| 65 74 63 68 20 6e 65 78 | 74 20 72 6f 77 20 66 72 |etch nex|t row fr|
|00001780| 6f 6d 20 76 69 72 74 75 | 61 6c 20 61 72 72 61 79 |om virtu|al array|
|00001790| 20 2a 2f 0a 58 20 20 73 | 6f 75 72 63 65 2d 3e 73 | */.X s|ource->s|
|000017a0| 6f 75 72 63 65 5f 72 6f | 77 2d 2d 3b 0a 58 20 20 |ource_ro|w--;.X |
|000017b0| 69 6d 61 67 65 5f 70 74 | 72 20 3d 20 28 2a 63 69 |image_pt|r = (*ci|
|000017c0| 6e 66 6f 2d 3e 6d 65 6d | 2d 3e 61 63 63 65 73 73 |nfo->mem|->access|
|000017d0| 5f 76 69 72 74 5f 73 61 | 72 72 61 79 29 0a 58 20 |_virt_sa|rray).X |
|000017e0| 20 20 20 28 28 6a 5f 63 | 6f 6d 6d 6f 6e 5f 70 74 | ((j_c|ommon_pt|
|000017f0| 72 29 20 63 69 6e 66 6f | 2c 20 73 6f 75 72 63 65 |r) cinfo|, source|
|00001800| 2d 3e 77 68 6f 6c 65 5f | 69 6d 61 67 65 2c 20 73 |->whole_|image, s|
|00001810| 6f 75 72 63 65 2d 3e 73 | 6f 75 72 63 65 5f 72 6f |ource->s|ource_ro|
|00001820| 77 2c 20 46 41 4c 53 45 | 29 3b 0a 58 0a 58 20 20 |w, FALSE|);.X.X |
|00001830| 2f 2a 20 54 72 61 6e 73 | 66 65 72 20 64 61 74 61 |/* Trans|fer data|
|00001840| 2e 20 20 4e 6f 74 65 20 | 73 6f 75 72 63 65 20 76 |. Note |source v|
|00001850| 61 6c 75 65 73 20 61 72 | 65 20 69 6e 20 42 47 52 |alues ar|e in BGR|
|00001860| 20 6f 72 64 65 72 0a 58 | 20 20 20 2a 20 28 65 76 | order.X| * (ev|
|00001870| 65 6e 20 74 68 6f 75 67 | 68 20 4d 69 63 72 6f 73 |en thoug|h Micros|
|00001880| 6f 66 74 27 73 20 6f 77 | 6e 20 64 6f 63 75 6d 65 |oft's ow|n docume|
|00001890| 6e 74 73 20 73 61 79 20 | 74 68 65 20 6f 70 70 6f |nts say |the oppo|
|000018a0| 73 69 74 65 29 2e 0a 58 | 20 20 20 2a 2f 0a 58 20 |site)..X| */.X |
|000018b0| 20 69 6e 70 74 72 20 3d | 20 69 6d 61 67 65 5f 70 | inptr =| image_p|
|000018c0| 74 72 5b 30 5d 3b 0a 58 | 20 20 6f 75 74 70 74 72 |tr[0];.X| outptr|
|000018d0| 20 3d 20 73 6f 75 72 63 | 65 2d 3e 70 75 62 2e 62 | = sourc|e->pub.b|
|000018e0| 75 66 66 65 72 5b 30 5d | 3b 0a 58 20 20 66 6f 72 |uffer[0]|;.X for|
|000018f0| 20 28 63 6f 6c 20 3d 20 | 63 69 6e 66 6f 2d 3e 69 | (col = |cinfo->i|
|00001900| 6d 61 67 65 5f 77 69 64 | 74 68 3b 20 63 6f 6c 20 |mage_wid|th; col |
|00001910| 3e 20 30 3b 20 63 6f 6c | 2d 2d 29 20 7b 0a 58 20 |> 0; col|--) {.X |
|00001920| 20 20 20 6f 75 74 70 74 | 72 5b 32 5d 20 3d 20 2a | outpt|r[2] = *|
|00001930| 69 6e 70 74 72 2b 2b 3b | 09 2f 2a 20 63 61 6e 20 |inptr++;|./* can |
|00001940| 6f 6d 69 74 20 47 45 54 | 4a 53 41 4d 50 4c 45 28 |omit GET|JSAMPLE(|
|00001950| 29 20 73 61 66 65 6c 79 | 20 2a 2f 0a 58 20 20 20 |) safely| */.X |
|00001960| 20 6f 75 74 70 74 72 5b | 31 5d 20 3d 20 2a 69 6e | outptr[|1] = *in|
|00001970| 70 74 72 2b 2b 3b 0a 58 | 20 20 20 20 6f 75 74 70 |ptr++;.X| outp|
|00001980| 74 72 5b 30 5d 20 3d 20 | 2a 69 6e 70 74 72 2b 2b |tr[0] = |*inptr++|
|00001990| 3b 0a 58 20 20 20 20 6f | 75 74 70 74 72 20 2b 3d |;.X o|utptr +=|
|000019a0| 20 33 3b 0a 58 20 20 7d | 0a 58 0a 58 20 20 72 65 | 3;.X }|.X.X re|
|000019b0| 74 75 72 6e 20 31 3b 0a | 58 7d 0a 58 0a 58 0a 58 |turn 1;.|X}.X.X.X|
|000019c0| 2f 2a 0a 58 20 2a 20 54 | 68 69 73 20 6d 65 74 68 |/*.X * T|his meth|
|000019d0| 6f 64 20 6c 6f 61 64 73 | 20 74 68 65 20 69 6d 61 |od loads| the ima|
|000019e0| 67 65 20 69 6e 74 6f 20 | 77 68 6f 6c 65 5f 69 6d |ge into |whole_im|
|000019f0| 61 67 65 20 64 75 72 69 | 6e 67 20 74 68 65 20 66 |age duri|ng the f|
|00001a00| 69 72 73 74 20 63 61 6c | 6c 20 6f 6e 0a 58 20 2a |irst cal|l on.X *|
|00001a10| 20 67 65 74 5f 70 69 78 | 65 6c 5f 72 6f 77 73 2e | get_pix|el_rows.|
|00001a20| 20 20 54 68 65 20 67 65 | 74 5f 70 69 78 65 6c 5f | The ge|t_pixel_|
|00001a30| 72 6f 77 73 20 70 6f 69 | 6e 74 65 72 20 69 73 20 |rows poi|nter is |
|00001a40| 74 68 65 6e 20 61 64 6a | 75 73 74 65 64 20 74 6f |then adj|usted to|
|00001a50| 20 63 61 6c 6c 0a 58 20 | 2a 20 67 65 74 5f 38 62 | call.X |* get_8b|
|00001a60| 69 74 5f 72 6f 77 20 6f | 72 20 67 65 74 5f 32 34 |it_row o|r get_24|
|00001a70| 62 69 74 5f 72 6f 77 20 | 6f 6e 20 73 75 62 73 65 |bit_row |on subse|
|00001a80| 71 75 65 6e 74 20 63 61 | 6c 6c 73 2e 0a 58 20 2a |quent ca|lls..X *|
|00001a90| 2f 0a 58 0a 58 4d 45 54 | 48 4f 44 44 45 46 20 4a |/.X.XMET|HODDEF J|
|00001aa0| 44 49 4d 45 4e 53 49 4f | 4e 0a 58 70 72 65 6c 6f |DIMENSIO|N.Xprelo|
|00001ab0| 61 64 5f 69 6d 61 67 65 | 20 28 6a 5f 63 6f 6d 70 |ad_image| (j_comp|
|00001ac0| 72 65 73 73 5f 70 74 72 | 20 63 69 6e 66 6f 2c 20 |ress_ptr| cinfo, |
|00001ad0| 63 6a 70 65 67 5f 73 6f | 75 72 63 65 5f 70 74 72 |cjpeg_so|urce_ptr|
|00001ae0| 20 73 69 6e 66 6f 29 0a | 58 7b 0a 58 20 20 62 6d | sinfo).|X{.X bm|
|00001af0| 70 5f 73 6f 75 72 63 65 | 5f 70 74 72 20 73 6f 75 |p_source|_ptr sou|
|00001b00| 72 63 65 20 3d 20 28 62 | 6d 70 5f 73 6f 75 72 63 |rce = (b|mp_sourc|
|00001b10| 65 5f 70 74 72 29 20 73 | 69 6e 66 6f 3b 0a 58 20 |e_ptr) s|info;.X |
|00001b20| 20 72 65 67 69 73 74 65 | 72 20 46 49 4c 45 20 2a | registe|r FILE *|
|00001b30| 69 6e 66 69 6c 65 20 3d | 20 73 6f 75 72 63 65 2d |infile =| source-|
|00001b40| 3e 70 75 62 2e 69 6e 70 | 75 74 5f 66 69 6c 65 3b |>pub.inp|ut_file;|
|00001b50| 0a 58 20 20 72 65 67 69 | 73 74 65 72 20 69 6e 74 |.X regi|ster int|
|00001b60| 20 63 3b 0a 58 20 20 72 | 65 67 69 73 74 65 72 20 | c;.X r|egister |
|00001b70| 4a 53 41 4d 50 52 4f 57 | 20 6f 75 74 5f 70 74 72 |JSAMPROW| out_ptr|
|00001b80| 3b 0a 58 20 20 4a 53 41 | 4d 50 41 52 52 41 59 20 |;.X JSA|MPARRAY |
|00001b90| 69 6d 61 67 65 5f 70 74 | 72 3b 0a 58 20 20 4a 44 |image_pt|r;.X JD|
|00001ba0| 49 4d 45 4e 53 49 4f 4e | 20 72 6f 77 2c 20 63 6f |IMENSION| row, co|
|00001bb0| 6c 3b 0a 58 20 20 63 64 | 5f 70 72 6f 67 72 65 73 |l;.X cd|_progres|
|00001bc0| 73 5f 70 74 72 20 70 72 | 6f 67 72 65 73 73 20 3d |s_ptr pr|ogress =|
|00001bd0| 20 28 63 64 5f 70 72 6f | 67 72 65 73 73 5f 70 74 | (cd_pro|gress_pt|
|00001be0| 72 29 20 63 69 6e 66 6f | 2d 3e 70 72 6f 67 72 65 |r) cinfo|->progre|
|00001bf0| 73 73 3b 0a 58 0a 58 20 | 20 2f 2a 20 52 65 61 64 |ss;.X.X | /* Read|
|00001c00| 20 74 68 65 20 64 61 74 | 61 20 69 6e 74 6f 20 61 | the dat|a into a|
|00001c10| 20 76 69 72 74 75 61 6c | 20 61 72 72 61 79 20 69 | virtual| array i|
|00001c20| 6e 20 69 6e 70 75 74 2d | 66 69 6c 65 20 72 6f 77 |n input-|file row|
|00001c30| 20 6f 72 64 65 72 2e 20 | 2a 2f 0a 58 20 20 66 6f | order. |*/.X fo|
|00001c40| 72 20 28 72 6f 77 20 3d | 20 30 3b 20 72 6f 77 20 |r (row =| 0; row |
|00001c50| 3c 20 63 69 6e 66 6f 2d | 3e 69 6d 61 67 65 5f 68 |< cinfo-|>image_h|
|00001c60| 65 69 67 68 74 3b 20 72 | 6f 77 2b 2b 29 20 7b 0a |eight; r|ow++) {.|
|00001c70| 58 20 20 20 20 69 66 20 | 28 70 72 6f 67 72 65 73 |X if |(progres|
|00001c80| 73 20 21 3d 20 4e 55 4c | 4c 29 20 7b 0a 58 20 20 |s != NUL|L) {.X |
|00001c90| 20 20 20 20 70 72 6f 67 | 72 65 73 73 2d 3e 70 75 | prog|ress->pu|
|00001ca0| 62 2e 70 61 73 73 5f 63 | 6f 75 6e 74 65 72 20 3d |b.pass_c|ounter =|
|00001cb0| 20 28 6c 6f 6e 67 29 20 | 72 6f 77 3b 0a 58 20 20 | (long) |row;.X |
|00001cc0| 20 20 20 20 70 72 6f 67 | 72 65 73 73 2d 3e 70 75 | prog|ress->pu|
|00001cd0| 62 2e 70 61 73 73 5f 6c | 69 6d 69 74 20 3d 20 28 |b.pass_l|imit = (|
|00001ce0| 6c 6f 6e 67 29 20 63 69 | 6e 66 6f 2d 3e 69 6d 61 |long) ci|nfo->ima|
|00001cf0| 67 65 5f 68 65 69 67 68 | 74 3b 0a 58 20 20 20 20 |ge_heigh|t;.X |
|00001d00| 20 20 28 2a 70 72 6f 67 | 72 65 73 73 2d 3e 70 75 | (*prog|ress->pu|
|00001d10| 62 2e 70 72 6f 67 72 65 | 73 73 5f 6d 6f 6e 69 74 |b.progre|ss_monit|
|00001d20| 6f 72 29 20 28 28 6a 5f | 63 6f 6d 6d 6f 6e 5f 70 |or) ((j_|common_p|
|00001d30| 74 72 29 20 63 69 6e 66 | 6f 29 3b 0a 58 20 20 20 |tr) cinf|o);.X |
|00001d40| 20 7d 0a 58 20 20 20 20 | 69 6d 61 67 65 5f 70 74 | }.X |image_pt|
|00001d50| 72 20 3d 20 28 2a 63 69 | 6e 66 6f 2d 3e 6d 65 6d |r = (*ci|nfo->mem|
|00001d60| 2d 3e 61 63 63 65 73 73 | 5f 76 69 72 74 5f 73 61 |->access|_virt_sa|
|00001d70| 72 72 61 79 29 0a 58 20 | 20 20 20 20 20 28 28 6a |rray).X | ((j|
|00001d80| 5f 63 6f 6d 6d 6f 6e 5f | 70 74 72 29 20 63 69 6e |_common_|ptr) cin|
|00001d90| 66 6f 2c 20 73 6f 75 72 | 63 65 2d 3e 77 68 6f 6c |fo, sour|ce->whol|
|00001da0| 65 5f 69 6d 61 67 65 2c | 20 72 6f 77 2c 20 54 52 |e_image,| row, TR|
|00001db0| 55 45 29 3b 0a 58 20 20 | 20 20 6f 75 74 5f 70 74 |UE);.X | out_pt|
|00001dc0| 72 20 3d 20 69 6d 61 67 | 65 5f 70 74 72 5b 30 5d |r = imag|e_ptr[0]|
|00001dd0| 3b 0a 58 20 20 20 20 66 | 6f 72 20 28 63 6f 6c 20 |;.X f|or (col |
|00001de0| 3d 20 73 6f 75 72 63 65 | 2d 3e 72 6f 77 5f 77 69 |= source|->row_wi|
|00001df0| 64 74 68 3b 20 63 6f 6c | 20 3e 20 30 3b 20 63 6f |dth; col| > 0; co|
|00001e00| 6c 2d 2d 29 20 7b 0a 58 | 20 20 20 20 20 20 2f 2a |l--) {.X| /*|
|00001e10| 20 69 6e 6c 69 6e 65 20 | 63 6f 70 79 20 6f 66 20 | inline |copy of |
|00001e20| 72 65 61 64 5f 62 79 74 | 65 28 29 20 66 6f 72 20 |read_byt|e() for |
|00001e30| 73 70 65 65 64 20 2a 2f | 0a 58 20 20 20 20 20 20 |speed */|.X |
|00001e40| 69 66 20 28 28 63 20 3d | 20 67 65 74 63 28 69 6e |if ((c =| getc(in|
|00001e50| 66 69 6c 65 29 29 20 3d | 3d 20 45 4f 46 29 0a 58 |file)) =|= EOF).X|
|00001e60| 09 45 52 52 45 58 49 54 | 28 63 69 6e 66 6f 2c 20 |.ERREXIT|(cinfo, |
|00001e70| 4a 45 52 52 5f 49 4e 50 | 55 54 5f 45 4f 46 29 3b |JERR_INP|UT_EOF);|
|00001e80| 0a 58 20 20 20 20 20 20 | 2a 6f 75 74 5f 70 74 72 |.X |*out_ptr|
|00001e90| 2b 2b 20 3d 20 28 4a 53 | 41 4d 50 4c 45 29 20 63 |++ = (JS|AMPLE) c|
|00001ea0| 3b 0a 58 20 20 20 20 7d | 0a 58 20 20 7d 0a 58 20 |;.X }|.X }.X |
|00001eb0| 20 69 66 20 28 70 72 6f | 67 72 65 73 73 20 21 3d | if (pro|gress !=|
|00001ec0| 20 4e 55 4c 4c 29 0a 58 | 20 20 20 20 70 72 6f 67 | NULL).X| prog|
|00001ed0| 72 65 73 73 2d 3e 63 6f | 6d 70 6c 65 74 65 64 5f |ress->co|mpleted_|
|00001ee0| 65 78 74 72 61 5f 70 61 | 73 73 65 73 2b 2b 3b 0a |extra_pa|sses++;.|
|00001ef0| 58 0a 58 20 20 2f 2a 20 | 53 65 74 20 75 70 20 74 |X.X /* |Set up t|
|00001f00| 6f 20 72 65 61 64 20 66 | 72 6f 6d 20 74 68 65 20 |o read f|rom the |
|00001f10| 76 69 72 74 75 61 6c 20 | 61 72 72 61 79 20 69 6e |virtual |array in|
|00001f20| 20 74 6f 70 2d 74 6f 2d | 62 6f 74 74 6f 6d 20 6f | top-to-|bottom o|
|00001f30| 72 64 65 72 20 2a 2f 0a | 58 20 20 73 77 69 74 63 |rder */.|X switc|
|00001f40| 68 20 28 73 6f 75 72 63 | 65 2d 3e 62 69 74 73 5f |h (sourc|e->bits_|
|00001f50| 70 65 72 5f 70 69 78 65 | 6c 29 20 7b 0a 58 20 20 |per_pixe|l) {.X |
|00001f60| 63 61 73 65 20 38 3a 0a | 58 20 20 20 20 73 6f 75 |case 8:.|X sou|
|00001f70| 72 63 65 2d 3e 70 75 62 | 2e 67 65 74 5f 70 69 78 |rce->pub|.get_pix|
|00001f80| 65 6c 5f 72 6f 77 73 20 | 3d 20 67 65 74 5f 38 62 |el_rows |= get_8b|
|00001f90| 69 74 5f 72 6f 77 3b 0a | 58 20 20 20 20 62 72 65 |it_row;.|X bre|
|00001fa0| 61 6b 3b 0a 58 20 20 63 | 61 73 65 20 32 34 3a 0a |ak;.X c|ase 24:.|
|00001fb0| 58 20 20 20 20 73 6f 75 | 72 63 65 2d 3e 70 75 62 |X sou|rce->pub|
|00001fc0| 2e 67 65 74 5f 70 69 78 | 65 6c 5f 72 6f 77 73 20 |.get_pix|el_rows |
|00001fd0| 3d 20 67 65 74 5f 32 34 | 62 69 74 5f 72 6f 77 3b |= get_24|bit_row;|
|00001fe0| 0a 58 20 20 20 20 62 72 | 65 61 6b 3b 0a 58 20 20 |.X br|eak;.X |
|00001ff0| 64 65 66 61 75 6c 74 3a | 0a 58 20 20 20 20 45 52 |default:|.X ER|
|00002000| 52 45 58 49 54 28 63 69 | 6e 66 6f 2c 20 4a 45 52 |REXIT(ci|nfo, JER|
|00002010| 52 5f 42 4d 50 5f 42 41 | 44 44 45 50 54 48 29 3b |R_BMP_BA|DDEPTH);|
|00002020| 0a 58 20 20 7d 0a 58 20 | 20 73 6f 75 72 63 65 2d |.X }.X | source-|
|00002030| 3e 73 6f 75 72 63 65 5f | 72 6f 77 20 3d 20 63 69 |>source_|row = ci|
|00002040| 6e 66 6f 2d 3e 69 6d 61 | 67 65 5f 68 65 69 67 68 |nfo->ima|ge_heigh|
|00002050| 74 3b 0a 58 0a 58 20 20 | 2f 2a 20 41 6e 64 20 72 |t;.X.X |/* And r|
|00002060| 65 61 64 20 74 68 65 20 | 66 69 72 73 74 20 72 6f |ead the |first ro|
|00002070| 77 20 2a 2f 0a 58 20 20 | 72 65 74 75 72 6e 20 28 |w */.X |return (|
|00002080| 2a 73 6f 75 72 63 65 2d | 3e 70 75 62 2e 67 65 74 |*source-|>pub.get|
|00002090| 5f 70 69 78 65 6c 5f 72 | 6f 77 73 29 20 28 63 69 |_pixel_r|ows) (ci|
|000020a0| 6e 66 6f 2c 20 73 69 6e | 66 6f 29 3b 0a 58 7d 0a |nfo, sin|fo);.X}.|
|000020b0| 58 0a 58 0a 58 2f 2a 0a | 58 20 2a 20 52 65 61 64 |X.X.X/*.|X * Read|
|000020c0| 20 74 68 65 20 66 69 6c | 65 20 68 65 61 64 65 72 | the fil|e header|
|000020d0| 3b 20 72 65 74 75 72 6e | 20 69 6d 61 67 65 20 73 |; return| image s|
|000020e0| 69 7a 65 20 61 6e 64 20 | 63 6f 6d 70 6f 6e 65 6e |ize and |componen|
|000020f0| 74 20 63 6f 75 6e 74 2e | 0a 58 20 2a 2f 0a 58 0a |t count.|.X */.X.|
|00002100| 58 4d 45 54 48 4f 44 44 | 45 46 20 76 6f 69 64 0a |XMETHODD|EF void.|
|00002110| 58 73 74 61 72 74 5f 69 | 6e 70 75 74 5f 62 6d 70 |Xstart_i|nput_bmp|
|00002120| 20 28 6a 5f 63 6f 6d 70 | 72 65 73 73 5f 70 74 72 | (j_comp|ress_ptr|
|00002130| 20 63 69 6e 66 6f 2c 20 | 63 6a 70 65 67 5f 73 6f | cinfo, |cjpeg_so|
|00002140| 75 72 63 65 5f 70 74 72 | 20 73 69 6e 66 6f 29 0a |urce_ptr| sinfo).|
|00002150| 58 7b 0a 58 20 20 62 6d | 70 5f 73 6f 75 72 63 65 |X{.X bm|p_source|
|00002160| 5f 70 74 72 20 73 6f 75 | 72 63 65 20 3d 20 28 62 |_ptr sou|rce = (b|
|00002170| 6d 70 5f 73 6f 75 72 63 | 65 5f 70 74 72 29 20 73 |mp_sourc|e_ptr) s|
|00002180| 69 6e 66 6f 3b 0a 58 20 | 20 55 5f 43 48 41 52 20 |info;.X | U_CHAR |
|00002190| 62 6d 70 66 69 6c 65 68 | 65 61 64 65 72 5b 31 34 |bmpfileh|eader[14|
|000021a0| 5d 3b 0a 58 20 20 55 5f | 43 48 41 52 20 62 6d 70 |];.X U_|CHAR bmp|
|000021b0| 69 6e 66 6f 68 65 61 64 | 65 72 5b 36 34 5d 3b 0a |infohead|er[64];.|
|000021c0| 58 23 64 65 66 69 6e 65 | 20 47 45 54 5f 32 42 28 |X#define| GET_2B(|
|000021d0| 61 72 72 61 79 2c 6f 66 | 66 73 65 74 29 20 20 28 |array,of|fset) (|
|000021e0| 28 75 6e 73 69 67 6e 65 | 64 20 69 6e 74 29 20 55 |(unsigne|d int) U|
|000021f0| 43 48 28 61 72 72 61 79 | 5b 6f 66 66 73 65 74 5d |CH(array|[offset]|
|00002200| 29 20 2b 20 5c 0a 58 09 | 09 09 20 20 20 20 20 20 |) + \.X.|.. |
|00002210| 20 28 28 28 75 6e 73 69 | 67 6e 65 64 20 69 6e 74 | (((unsi|gned int|
|00002220| 29 20 55 43 48 28 61 72 | 72 61 79 5b 6f 66 66 73 |) UCH(ar|ray[offs|
|00002230| 65 74 2b 31 5d 29 29 20 | 3c 3c 20 38 29 29 0a 58 |et+1])) |<< 8)).X|
|00002240| 23 64 65 66 69 6e 65 20 | 47 45 54 5f 34 42 28 61 |#define |GET_4B(a|
|00002250| 72 72 61 79 2c 6f 66 66 | 73 65 74 29 20 20 28 28 |rray,off|set) ((|
|00002260| 49 4e 54 33 32 29 20 55 | 43 48 28 61 72 72 61 79 |INT32) U|CH(array|
|00002270| 5b 6f 66 66 73 65 74 5d | 29 20 2b 20 5c 0a 58 09 |[offset]|) + \.X.|
|00002280| 09 09 20 20 20 20 20 20 | 20 28 28 28 49 4e 54 33 |.. | (((INT3|
|00002290| 32 29 20 55 43 48 28 61 | 72 72 61 79 5b 6f 66 66 |2) UCH(a|rray[off|
|000022a0| 73 65 74 2b 31 5d 29 29 | 20 3c 3c 20 38 29 20 2b |set+1]))| << 8) +|
|000022b0| 20 5c 0a 58 09 09 09 20 | 20 20 20 20 20 20 28 28 | \.X... | ((|
|000022c0| 28 49 4e 54 33 32 29 20 | 55 43 48 28 61 72 72 61 |(INT32) |UCH(arra|
|000022d0| 79 5b 6f 66 66 73 65 74 | 2b 32 5d 29 29 20 3c 3c |y[offset|+2])) <<|
|000022e0| 20 31 36 29 20 2b 20 5c | 0a 58 09 09 09 20 20 20 | 16) + \|.X... |
|000022f0| 20 20 20 20 28 28 28 49 | 4e 54 33 32 29 20 55 43 | (((I|NT32) UC|
|00002300| 48 28 61 72 72 61 79 5b | 6f 66 66 73 65 74 2b 33 |H(array[|offset+3|
|00002310| 5d 29 29 20 3c 3c 20 32 | 34 29 29 0a 58 20 20 49 |])) << 2|4)).X I|
|00002320| 4e 54 33 32 20 68 65 61 | 64 65 72 53 69 7a 65 3b |NT32 hea|derSize;|
|00002330| 0a 58 20 20 49 4e 54 33 | 32 20 62 69 57 69 64 74 |.X INT3|2 biWidt|
|00002340| 68 20 3d 20 30 3b 09 09 | 2f 2a 20 69 6e 69 74 69 |h = 0;..|/* initi|
|00002350| 61 6c 69 7a 65 20 74 6f | 20 61 76 6f 69 64 20 63 |alize to| avoid c|
|00002360| 6f 6d 70 69 6c 65 72 20 | 77 61 72 6e 69 6e 67 20 |ompiler |warning |
|00002370| 2a 2f 0a 58 20 20 49 4e | 54 33 32 20 62 69 48 65 |*/.X IN|T32 biHe|
|00002380| 69 67 68 74 20 3d 20 30 | 3b 0a 58 20 20 75 6e 73 |ight = 0|;.X uns|
|00002390| 69 67 6e 65 64 20 69 6e | 74 20 62 69 50 6c 61 6e |igned in|t biPlan|
|000023a0| 65 73 3b 0a 58 20 20 49 | 4e 54 33 32 20 62 69 43 |es;.X I|NT32 biC|
|000023b0| 6f 6d 70 72 65 73 73 69 | 6f 6e 3b 0a 58 20 20 49 |ompressi|on;.X I|
|000023c0| 4e 54 33 32 20 62 69 58 | 50 65 6c 73 50 65 72 4d |NT32 biX|PelsPerM|
|000023d0| 65 74 65 72 2c 62 69 59 | 50 65 6c 73 50 65 72 4d |eter,biY|PelsPerM|
|000023e0| 65 74 65 72 3b 0a 58 20 | 20 49 4e 54 33 32 20 62 |eter;.X | INT32 b|
|000023f0| 69 43 6c 72 55 73 65 64 | 20 3d 20 30 3b 0a 58 20 |iClrUsed| = 0;.X |
|00002400| 20 69 6e 74 20 6d 61 70 | 65 6e 74 72 79 73 69 7a | int map|entrysiz|
|00002410| 65 20 3d 20 30 3b 09 09 | 2f 2a 20 30 20 69 6e 64 |e = 0;..|/* 0 ind|
|00002420| 69 63 61 74 65 73 20 6e | 6f 20 63 6f 6c 6f 72 6d |icates n|o colorm|
|00002430| 61 70 20 2a 2f 0a 58 20 | 20 4a 44 49 4d 45 4e 53 |ap */.X | JDIMENS|
|00002440| 49 4f 4e 20 72 6f 77 5f | 77 69 64 74 68 3b 0a 58 |ION row_|width;.X|
|00002450| 0a 58 20 20 2f 2a 20 52 | 65 61 64 20 61 6e 64 20 |.X /* R|ead and |
|00002460| 76 65 72 69 66 79 20 74 | 68 65 20 62 69 74 6d 61 |verify t|he bitma|
|00002470| 70 20 66 69 6c 65 20 68 | 65 61 64 65 72 20 2a 2f |p file h|eader */|
|00002480| 0a 58 20 20 69 66 20 28 | 21 20 52 65 61 64 4f 4b |.X if (|! ReadOK|
|00002490| 28 73 6f 75 72 63 65 2d | 3e 70 75 62 2e 69 6e 70 |(source-|>pub.inp|
|000024a0| 75 74 5f 66 69 6c 65 2c | 20 62 6d 70 66 69 6c 65 |ut_file,| bmpfile|
|000024b0| 68 65 61 64 65 72 2c 20 | 31 34 29 29 0a 58 20 20 |header, |14)).X |
|000024c0| 20 20 45 52 52 45 58 49 | 54 28 63 69 6e 66 6f 2c | ERREXI|T(cinfo,|
|000024d0| 20 4a 45 52 52 5f 49 4e | 50 55 54 5f 45 4f 46 29 | JERR_IN|PUT_EOF)|
|000024e0| 3b 0a 58 20 20 69 66 20 | 28 47 45 54 5f 32 42 28 |;.X if |(GET_2B(|
|000024f0| 62 6d 70 66 69 6c 65 68 | 65 61 64 65 72 2c 30 29 |bmpfileh|eader,0)|
|00002500| 20 21 3d 20 30 78 34 44 | 34 32 29 20 2f 2a 20 27 | != 0x4D|42) /* '|
|00002510| 42 4d 27 20 2a 2f 0a 58 | 20 20 20 20 45 52 52 45 |BM' */.X| ERRE|
|00002520| 58 49 54 28 63 69 6e 66 | 6f 2c 20 4a 45 52 52 5f |XIT(cinf|o, JERR_|
|00002530| 42 4d 50 5f 4e 4f 54 29 | 3b 0a 58 20 20 2f 2a 20 |BMP_NOT)|;.X /* |
|00002540| 57 65 20 69 67 6e 6f 72 | 65 20 74 68 65 20 72 65 |We ignor|e the re|
|00002550| 6d 61 69 6e 69 6e 67 20 | 66 69 6c 65 68 65 61 64 |maining |filehead|
|00002560| 65 72 20 66 69 65 6c 64 | 73 20 2a 2f 0a 58 0a 58 |er field|s */.X.X|
|00002570| 20 20 2f 2a 20 54 68 65 | 20 69 6e 66 6f 68 65 61 | /* The| infohea|
|00002580| 64 65 72 20 6d 69 67 68 | 74 20 62 65 20 31 32 20 |der migh|t be 12 |
|00002590| 62 79 74 65 73 20 28 4f | 53 2f 32 20 31 2e 78 29 |bytes (O|S/2 1.x)|
|000025a0| 2c 20 34 30 20 62 79 74 | 65 73 20 28 57 69 6e 64 |, 40 byt|es (Wind|
|000025b0| 6f 77 73 29 2c 0a 58 20 | 20 20 2a 20 6f 72 20 36 |ows),.X | * or 6|
|000025c0| 34 20 62 79 74 65 73 20 | 28 4f 53 2f 32 20 32 2e |4 bytes |(OS/2 2.|
|000025d0| 78 29 2e 20 20 43 68 65 | 63 6b 20 74 68 65 20 66 |x). Che|ck the f|
|000025e0| 69 72 73 74 20 34 20 62 | 79 74 65 73 20 74 6f 20 |irst 4 b|ytes to |
|000025f0| 66 69 6e 64 20 6f 75 74 | 20 77 68 69 63 68 2e 0a |find out| which..|
|00002600| 58 20 20 20 2a 2f 0a 58 | 20 20 69 66 20 28 21 20 |X */.X| if (! |
|00002610| 52 65 61 64 4f 4b 28 73 | 6f 75 72 63 65 2d 3e 70 |ReadOK(s|ource->p|
|00002620| 75 62 2e 69 6e 70 75 74 | 5f 66 69 6c 65 2c 20 62 |ub.input|_file, b|
|00002630| 6d 70 69 6e 66 6f 68 65 | 61 64 65 72 2c 20 34 29 |mpinfohe|ader, 4)|
|00002640| 29 0a 58 20 20 20 20 45 | 52 52 45 58 49 54 28 63 |).X E|RREXIT(c|
|00002650| 69 6e 66 6f 2c 20 4a 45 | 52 52 5f 49 4e 50 55 54 |info, JE|RR_INPUT|
|00002660| 5f 45 4f 46 29 3b 0a 58 | 20 20 68 65 61 64 65 72 |_EOF);.X| header|
|00002670| 53 69 7a 65 20 3d 20 28 | 49 4e 54 33 32 29 20 47 |Size = (|INT32) G|
|00002680| 45 54 5f 34 42 28 62 6d | 70 69 6e 66 6f 68 65 61 |ET_4B(bm|pinfohea|
|00002690| 64 65 72 2c 30 29 3b 0a | 58 20 20 69 66 20 28 68 |der,0);.|X if (h|
|000026a0| 65 61 64 65 72 53 69 7a | 65 20 3c 20 31 32 20 7c |eaderSiz|e < 12 ||
|000026b0| 7c 20 68 65 61 64 65 72 | 53 69 7a 65 20 3e 20 36 || header|Size > 6|
|000026c0| 34 29 0a 58 20 20 20 20 | 45 52 52 45 58 49 54 28 |4).X |ERREXIT(|
|000026d0| 63 69 6e 66 6f 2c 20 4a | 45 52 52 5f 42 4d 50 5f |cinfo, J|ERR_BMP_|
|000026e0| 42 41 44 48 45 41 44 45 | 52 29 3b 0a 58 20 20 69 |BADHEADE|R);.X i|
|000026f0| 66 20 28 21 20 52 65 61 | 64 4f 4b 28 73 6f 75 72 |f (! Rea|dOK(sour|
|00002700| 63 65 2d 3e 70 75 62 2e | 69 6e 70 75 74 5f 66 69 |ce->pub.|input_fi|
|00002710| 6c 65 2c 20 62 6d 70 69 | 6e 66 6f 68 65 61 64 65 |le, bmpi|nfoheade|
|00002720| 72 2b 34 2c 20 68 65 61 | 64 65 72 53 69 7a 65 2d |r+4, hea|derSize-|
|00002730| 34 29 29 0a 58 20 20 20 | 20 45 52 52 45 58 49 54 |4)).X | ERREXIT|
|00002740| 28 63 69 6e 66 6f 2c 20 | 4a 45 52 52 5f 49 4e 50 |(cinfo, |JERR_INP|
|00002750| 55 54 5f 45 4f 46 29 3b | 0a 58 0a 58 20 20 73 77 |UT_EOF);|.X.X sw|
|00002760| 69 74 63 68 20 28 28 69 | 6e 74 29 20 68 65 61 64 |itch ((i|nt) head|
|00002770| 65 72 53 69 7a 65 29 20 | 7b 0a 58 20 20 63 61 73 |erSize) |{.X cas|
|00002780| 65 20 31 32 3a 0a 58 20 | 20 20 20 2f 2a 20 44 65 |e 12:.X | /* De|
|00002790| 63 6f 64 65 20 4f 53 2f | 32 20 31 2e 78 20 68 65 |code OS/|2 1.x he|
|000027a0| 61 64 65 72 20 28 4d 69 | 63 72 6f 73 6f 66 74 20 |ader (Mi|crosoft |
|000027b0| 63 61 6c 6c 73 20 74 68 | 69 73 20 61 20 42 49 54 |calls th|is a BIT|
|000027c0| 4d 41 50 43 4f 52 45 48 | 45 41 44 45 52 29 20 2a |MAPCOREH|EADER) *|
|000027d0| 2f 0a 58 20 20 20 20 62 | 69 57 69 64 74 68 20 3d |/.X b|iWidth =|
|000027e0| 20 28 49 4e 54 33 32 29 | 20 47 45 54 5f 32 42 28 | (INT32)| GET_2B(|
|000027f0| 62 6d 70 69 6e 66 6f 68 | 65 61 64 65 72 2c 34 29 |bmpinfoh|eader,4)|
|00002800| 3b 0a 58 20 20 20 20 62 | 69 48 65 69 67 68 74 20 |;.X b|iHeight |
|00002810| 3d 20 28 49 4e 54 33 32 | 29 20 47 45 54 5f 32 42 |= (INT32|) GET_2B|
|00002820| 28 62 6d 70 69 6e 66 6f | 68 65 61 64 65 72 2c 36 |(bmpinfo|header,6|
|00002830| 29 3b 0a 58 20 20 20 20 | 62 69 50 6c 61 6e 65 73 |);.X |biPlanes|
|00002840| 20 3d 20 47 45 54 5f 32 | 42 28 62 6d 70 69 6e 66 | = GET_2|B(bmpinf|
|00002850| 6f 68 65 61 64 65 72 2c | 38 29 3b 0a 58 20 20 20 |oheader,|8);.X |
|00002860| 20 73 6f 75 72 63 65 2d | 3e 62 69 74 73 5f 70 65 | source-|>bits_pe|
|00002870| 72 5f 70 69 78 65 6c 20 | 3d 20 28 69 6e 74 29 20 |r_pixel |= (int) |
|00002880| 47 45 54 5f 32 42 28 62 | 6d 70 69 6e 66 6f 68 65 |GET_2B(b|mpinfohe|
|00002890| 61 64 65 72 2c 31 30 29 | 3b 0a 58 0a 58 20 20 20 |ader,10)|;.X.X |
|000028a0| 20 73 77 69 74 63 68 20 | 28 73 6f 75 72 63 65 2d | switch |(source-|
|000028b0| 3e 62 69 74 73 5f 70 65 | 72 5f 70 69 78 65 6c 29 |>bits_pe|r_pixel)|
|000028c0| 20 7b 0a 58 20 20 20 20 | 63 61 73 65 20 38 3a 09 | {.X |case 8:.|
|000028d0| 09 09 2f 2a 20 63 6f 6c | 6f 72 6d 61 70 70 65 64 |../* col|ormapped|
|000028e0| 20 69 6d 61 67 65 20 2a | 2f 0a 58 20 20 20 20 20 | image *|/.X |
|000028f0| 20 6d 61 70 65 6e 74 72 | 79 73 69 7a 65 20 3d 20 | mapentr|ysize = |
|00002900| 33 3b 09 09 2f 2a 20 4f | 53 2f 32 20 75 73 65 73 |3;../* O|S/2 uses|
|00002910| 20 52 47 42 54 52 49 50 | 4c 45 20 63 6f 6c 6f 72 | RGBTRIP|LE color|
|00002920| 6d 61 70 20 2a 2f 0a 58 | 20 20 20 20 20 20 54 52 |map */.X| TR|
|00002930| 41 43 45 4d 53 32 28 63 | 69 6e 66 6f 2c 20 31 2c |ACEMS2(c|info, 1,|
|00002940| 20 4a 54 52 43 5f 42 4d | 50 5f 4f 53 32 5f 4d 41 | JTRC_BM|P_OS2_MA|
|00002950| 50 50 45 44 2c 20 28 69 | 6e 74 29 20 62 69 57 69 |PPED, (i|nt) biWi|
|00002960| 64 74 68 2c 20 28 69 6e | 74 29 20 62 69 48 65 69 |dth, (in|t) biHei|
|00002970| 67 68 74 29 3b 0a 58 20 | 20 20 20 20 20 62 72 65 |ght);.X | bre|
|00002980| 61 6b 3b 0a 58 20 20 20 | 20 63 61 73 65 20 32 34 |ak;.X | case 24|
|00002990| 3a 09 09 09 2f 2a 20 52 | 47 42 20 69 6d 61 67 65 |:.../* R|GB image|
|000029a0| 20 2a 2f 0a 58 20 20 20 | 20 20 20 54 52 41 43 45 | */.X | TRACE|
|000029b0| 4d 53 32 28 63 69 6e 66 | 6f 2c 20 31 2c 20 4a 54 |MS2(cinf|o, 1, JT|
|000029c0| 52 43 5f 42 4d 50 5f 4f | 53 32 2c 20 28 69 6e 74 |RC_BMP_O|S2, (int|
|000029d0| 29 20 62 69 57 69 64 74 | 68 2c 20 28 69 6e 74 29 |) biWidt|h, (int)|
|000029e0| 20 62 69 48 65 69 67 68 | 74 29 3b 0a 58 20 20 20 | biHeigh|t);.X |
|000029f0| 20 20 20 62 72 65 61 6b | 3b 0a 58 20 20 20 20 64 | break|;.X d|
|00002a00| 65 66 61 75 6c 74 3a 0a | 58 20 20 20 20 20 20 45 |efault:.|X E|
|00002a10| 52 52 45 58 49 54 28 63 | 69 6e 66 6f 2c 20 4a 45 |RREXIT(c|info, JE|
|00002a20| 52 52 5f 42 4d 50 5f 42 | 41 44 44 45 50 54 48 29 |RR_BMP_B|ADDEPTH)|
|00002a30| 3b 0a 58 20 20 20 20 20 | 20 62 72 65 61 6b 3b 0a |;.X | break;.|
|00002a40| 58 20 20 20 20 7d 0a 58 | 20 20 20 20 69 66 20 28 |X }.X| if (|
|00002a50| 62 69 50 6c 61 6e 65 73 | 20 21 3d 20 31 29 0a 58 |biPlanes| != 1).X|
|00002a60| 20 20 20 20 20 20 45 52 | 52 45 58 49 54 28 63 69 | ER|REXIT(ci|
|00002a70| 6e 66 6f 2c 20 4a 45 52 | 52 5f 42 4d 50 5f 42 41 |nfo, JER|R_BMP_BA|
|00002a80| 44 50 4c 41 4e 45 53 29 | 3b 0a 58 20 20 20 20 62 |DPLANES)|;.X b|
|00002a90| 72 65 61 6b 3b 0a 58 20 | 20 63 61 73 65 20 34 30 |reak;.X | case 40|
|00002aa0| 3a 0a 58 20 20 63 61 73 | 65 20 36 34 3a 0a 58 20 |:.X cas|e 64:.X |
|00002ab0| 20 20 20 2f 2a 20 44 65 | 63 6f 64 65 20 57 69 6e | /* De|code Win|
|00002ac0| 64 6f 77 73 20 33 2e 78 | 20 68 65 61 64 65 72 20 |dows 3.x| header |
|00002ad0| 28 4d 69 63 72 6f 73 6f | 66 74 20 63 61 6c 6c 73 |(Microso|ft calls|
|00002ae0| 20 74 68 69 73 20 61 20 | 42 49 54 4d 41 50 49 4e | this a |BITMAPIN|
|00002af0| 46 4f 48 45 41 44 45 52 | 29 20 2a 2f 0a 58 20 20 |FOHEADER|) */.X |
|00002b00| 20 20 2f 2a 20 6f 72 20 | 4f 53 2f 32 20 32 2e 78 | /* or |OS/2 2.x|
|00002b10| 20 68 65 61 64 65 72 2c | 20 77 68 69 63 68 20 68 | header,| which h|
|00002b20| 61 73 20 61 64 64 69 74 | 69 6f 6e 61 6c 20 66 69 |as addit|ional fi|
|00002b30| 65 6c 64 73 20 74 68 61 | 74 20 77 65 20 69 67 6e |elds tha|t we ign|
|00002b40| 6f 72 65 20 2a 2f 0a 58 | 20 20 20 20 62 69 57 69 |ore */.X| biWi|
|00002b50| 64 74 68 20 3d 20 47 45 | 54 5f 34 42 28 62 6d 70 |dth = GE|T_4B(bmp|
|00002b60| 69 6e 66 6f 68 65 61 64 | 65 72 2c 34 29 3b 0a 58 |infohead|er,4);.X|
|00002b70| 20 20 20 20 62 69 48 65 | 69 67 68 74 20 3d 20 47 | biHe|ight = G|
|00002b80| 45 54 5f 34 42 28 62 6d | 70 69 6e 66 6f 68 65 61 |ET_4B(bm|pinfohea|
|00002b90| 64 65 72 2c 38 29 3b 0a | 58 20 20 20 20 62 69 50 |der,8);.|X biP|
|00002ba0| 6c 61 6e 65 73 20 3d 20 | 47 45 54 5f 32 42 28 62 |lanes = |GET_2B(b|
|00002bb0| 6d 70 69 6e 66 6f 68 65 | 61 64 65 72 2c 31 32 29 |mpinfohe|ader,12)|
|00002bc0| 3b 0a 58 20 20 20 20 73 | 6f 75 72 63 65 2d 3e 62 |;.X s|ource->b|
|00002bd0| 69 74 73 5f 70 65 72 5f | 70 69 78 65 6c 20 3d 20 |its_per_|pixel = |
|00002be0| 28 69 6e 74 29 20 47 45 | 54 5f 32 42 28 62 6d 70 |(int) GE|T_2B(bmp|
|00002bf0| 69 6e 66 6f 68 65 61 64 | 65 72 2c 31 34 29 3b 0a |infohead|er,14);.|
|00002c00| 58 20 20 20 20 62 69 43 | 6f 6d 70 72 65 73 73 69 |X biC|ompressi|
|00002c10| 6f 6e 20 3d 20 47 45 54 | 5f 34 42 28 62 6d 70 69 |on = GET|_4B(bmpi|
|00002c20| 6e 66 6f 68 65 61 64 65 | 72 2c 31 36 29 3b 0a 58 |nfoheade|r,16);.X|
|00002c30| 20 20 20 20 62 69 58 50 | 65 6c 73 50 65 72 4d 65 | biXP|elsPerMe|
|00002c40| 74 65 72 20 3d 20 47 45 | 54 5f 34 42 28 62 6d 70 |ter = GE|T_4B(bmp|
|00002c50| 69 6e 66 6f 68 65 61 64 | 65 72 2c 32 34 29 3b 0a |infohead|er,24);.|
|00002c60| 58 20 20 20 20 62 69 59 | 50 65 6c 73 50 65 72 4d |X biY|PelsPerM|
|00002c70| 65 74 65 72 20 3d 20 47 | 45 54 5f 34 42 28 62 6d |eter = G|ET_4B(bm|
|00002c80| 70 69 6e 66 6f 68 65 61 | 64 65 72 2c 32 38 29 3b |pinfohea|der,28);|
|00002c90| 0a 58 20 20 20 20 62 69 | 43 6c 72 55 73 65 64 20 |.X bi|ClrUsed |
|00002ca0| 3d 20 47 45 54 5f 34 42 | 28 62 6d 70 69 6e 66 6f |= GET_4B|(bmpinfo|
|00002cb0| 68 65 61 64 65 72 2c 33 | 32 29 3b 0a 58 20 20 20 |header,3|2);.X |
|00002cc0| 20 2f 2a 20 62 69 53 69 | 7a 65 49 6d 61 67 65 2c | /* biSi|zeImage,|
|00002cd0| 20 62 69 43 6c 72 49 6d | 70 6f 72 74 61 6e 74 20 | biClrIm|portant |
|00002ce0| 66 69 65 6c 64 73 20 61 | 72 65 20 69 67 6e 6f 72 |fields a|re ignor|
|00002cf0| 65 64 20 2a 2f 0a 58 0a | 58 20 20 20 20 73 77 69 |ed */.X.|X swi|
|00002d00| 74 63 68 20 28 73 6f 75 | 72 63 65 2d 3e 62 69 74 |tch (sou|rce->bit|
|00002d10| 73 5f 70 65 72 5f 70 69 | 78 65 6c 29 20 7b 0a 58 |s_per_pi|xel) {.X|
|00002d20| 20 20 20 20 63 61 73 65 | 20 38 3a 09 09 09 2f 2a | case| 8:.../*|
|00002d30| 20 63 6f 6c 6f 72 6d 61 | 70 70 65 64 20 69 6d 61 | colorma|pped ima|
|00002d40| 67 65 20 2a 2f 0a 58 20 | 20 20 20 20 20 6d 61 70 |ge */.X | map|
|00002d50| 65 6e 74 72 79 73 69 7a | 65 20 3d 20 34 3b 09 09 |entrysiz|e = 4;..|
|00002d60| 2f 2a 20 57 69 6e 64 6f | 77 73 20 75 73 65 73 20 |/* Windo|ws uses |
|00002d70| 52 47 42 51 55 41 44 20 | 63 6f 6c 6f 72 6d 61 70 |RGBQUAD |colormap|
|00002d80| 20 2a 2f 0a 58 20 20 20 | 20 20 20 54 52 41 43 45 | */.X | TRACE|
|00002d90| 4d 53 32 28 63 69 6e 66 | 6f 2c 20 31 2c 20 4a 54 |MS2(cinf|o, 1, JT|
|00002da0| 52 43 5f 42 4d 50 5f 4d | 41 50 50 45 44 2c 20 28 |RC_BMP_M|APPED, (|
|00002db0| 69 6e 74 29 20 62 69 57 | 69 64 74 68 2c 20 28 69 |int) biW|idth, (i|
|00002dc0| 6e 74 29 20 62 69 48 65 | 69 67 68 74 29 3b 0a 58 |nt) biHe|ight);.X|
|00002dd0| 20 20 20 20 20 20 62 72 | 65 61 6b 3b 0a 58 20 20 | br|eak;.X |
|00002de0| 20 20 63 61 73 65 20 32 | 34 3a 09 09 09 2f 2a 20 | case 2|4:.../* |
|00002df0| 52 47 42 20 69 6d 61 67 | 65 20 2a 2f 0a 58 20 20 |RGB imag|e */.X |
|00002e00| 20 20 20 20 54 52 41 43 | 45 4d 53 32 28 63 69 6e | TRAC|EMS2(cin|
|00002e10| 66 6f 2c 20 31 2c 20 4a | 54 52 43 5f 42 4d 50 2c |fo, 1, J|TRC_BMP,|
|00002e20| 20 28 69 6e 74 29 20 62 | 69 57 69 64 74 68 2c 20 | (int) b|iWidth, |
|00002e30| 28 69 6e 74 29 20 62 69 | 48 65 69 67 68 74 29 3b |(int) bi|Height);|
|00002e40| 0a 58 20 20 20 20 20 20 | 62 72 65 61 6b 3b 0a 58 |.X |break;.X|
|00002e50| 20 20 20 20 64 65 66 61 | 75 6c 74 3a 0a 58 20 20 | defa|ult:.X |
|00002e60| 20 20 20 20 45 52 52 45 | 58 49 54 28 63 69 6e 66 | ERRE|XIT(cinf|
|00002e70| 6f 2c 20 4a 45 52 52 5f | 42 4d 50 5f 42 41 44 44 |o, JERR_|BMP_BADD|
|00002e80| 45 50 54 48 29 3b 0a 58 | 20 20 20 20 20 20 62 72 |EPTH);.X| br|
|00002e90| 65 61 6b 3b 0a 58 20 20 | 20 20 7d 0a 58 20 20 20 |eak;.X | }.X |
|00002ea0| 20 69 66 20 28 62 69 50 | 6c 61 6e 65 73 20 21 3d | if (biP|lanes !=|
|00002eb0| 20 31 29 0a 58 20 20 20 | 20 20 20 45 52 52 45 58 | 1).X | ERREX|
|00002ec0| 49 54 28 63 69 6e 66 6f | 2c 20 4a 45 52 52 5f 42 |IT(cinfo|, JERR_B|
|00002ed0| 4d 50 5f 42 41 44 50 4c | 41 4e 45 53 29 3b 0a 58 |MP_BADPL|ANES);.X|
|00002ee0| 20 20 20 20 69 66 20 28 | 62 69 43 6f 6d 70 72 65 | if (|biCompre|
|00002ef0| 73 73 69 6f 6e 20 21 3d | 20 30 29 0a 58 20 20 20 |ssion !=| 0).X |
|00002f00| 20 20 20 45 52 52 45 58 | 49 54 28 63 69 6e 66 6f | ERREX|IT(cinfo|
|00002f10| 2c 20 4a 45 52 52 5f 42 | 4d 50 5f 43 4f 4d 50 52 |, JERR_B|MP_COMPR|
|00002f20| 45 53 53 45 44 29 3b 0a | 58 0a 58 20 20 20 20 69 |ESSED);.|X.X i|
|00002f30| 66 20 28 62 69 58 50 65 | 6c 73 50 65 72 4d 65 74 |f (biXPe|lsPerMet|
|00002f40| 65 72 20 3e 20 30 20 26 | 26 20 62 69 59 50 65 6c |er > 0 &|& biYPel|
|00002f50| 73 50 65 72 4d 65 74 65 | 72 20 3e 20 30 29 20 7b |sPerMete|r > 0) {|
|00002f60| 0a 58 20 20 20 20 20 20 | 2f 2a 20 53 65 74 20 4a |.X |/* Set J|
|00002f70| 46 49 46 20 64 65 6e 73 | 69 74 79 20 70 61 72 61 |FIF dens|ity para|
|00002f80| 6d 65 74 65 72 73 20 66 | 72 6f 6d 20 74 68 65 20 |meters f|rom the |
|00002f90| 42 4d 50 20 64 61 74 61 | 20 2a 2f 0a 58 20 20 20 |BMP data| */.X |
|00002fa0| 20 20 20 63 69 6e 66 6f | 2d 3e 58 5f 64 65 6e 73 | cinfo|->X_dens|
|00002fb0| 69 74 79 20 3d 20 28 55 | 49 4e 54 31 36 29 20 28 |ity = (U|INT16) (|
|00002fc0| 62 69 58 50 65 6c 73 50 | 65 72 4d 65 74 65 72 2f |biXPelsP|erMeter/|
|00002fd0| 31 30 30 29 3b 20 2f 2a | 20 31 30 30 20 63 6d 20 |100); /*| 100 cm |
|00002fe0| 70 65 72 20 6d 65 74 65 | 72 20 2a 2f 0a 58 20 20 |per mete|r */.X |
|00002ff0| 20 20 20 20 63 69 6e 66 | 6f 2d 3e 59 5f 64 65 6e | cinf|o->Y_den|
|00003000| 73 69 74 79 20 3d 20 28 | 55 49 4e 54 31 36 29 20 |sity = (|UINT16) |
|00003010| 28 62 69 59 50 65 6c 73 | 50 65 72 4d 65 74 65 72 |(biYPels|PerMeter|
|00003020| 2f 31 30 30 29 3b 0a 58 | 20 20 20 20 20 20 63 69 |/100);.X| ci|
|00003030| 6e 66 6f 2d 3e 64 65 6e | 73 69 74 79 5f 75 6e 69 |nfo->den|sity_uni|
|00003040| 74 20 3d 20 32 3b 09 2f | 2a 20 64 6f 74 73 2f 63 |t = 2;./|* dots/c|
|00003050| 6d 20 2a 2f 0a 58 20 20 | 20 20 7d 0a 58 20 20 20 |m */.X | }.X |
|00003060| 20 62 72 65 61 6b 3b 0a | 58 20 20 64 65 66 61 75 | break;.|X defau|
|00003070| 6c 74 3a 0a 58 20 20 20 | 20 45 52 52 45 58 49 54 |lt:.X | ERREXIT|
|00003080| 28 63 69 6e 66 6f 2c 20 | 4a 45 52 52 5f 42 4d 50 |(cinfo, |JERR_BMP|
|00003090| 5f 42 41 44 48 45 41 44 | 45 52 29 3b 0a 58 20 20 |_BADHEAD|ER);.X |
|000030a0| 20 20 62 72 65 61 6b 3b | 0a 58 20 20 7d 0a 58 0a | break;|.X }.X.|
|000030b0| 58 20 20 2f 2a 20 52 65 | 61 64 20 74 68 65 20 63 |X /* Re|ad the c|
|000030c0| 6f 6c 6f 72 6d 61 70 2c | 20 69 66 20 61 6e 79 20 |olormap,| if any |
|000030d0| 2a 2f 0a 58 20 20 69 66 | 20 28 6d 61 70 65 6e 74 |*/.X if| (mapent|
|000030e0| 72 79 73 69 7a 65 20 3e | 20 30 29 20 7b 0a 58 20 |rysize >| 0) {.X |
|000030f0| 20 20 20 69 66 20 28 62 | 69 43 6c 72 55 73 65 64 | if (b|iClrUsed|
|00003100| 20 3c 3d 20 30 29 0a 58 | 20 20 20 20 20 20 62 69 | <= 0).X| bi|
|00003110| 43 6c 72 55 73 65 64 20 | 3d 20 32 35 36 3b 09 09 |ClrUsed |= 256;..|
|00003120| 2f 2a 20 61 73 73 75 6d | 65 20 69 74 27 73 20 32 |/* assum|e it's 2|
|00003130| 35 36 20 2a 2f 0a 58 20 | 20 20 20 65 6c 73 65 20 |56 */.X | else |
|00003140| 69 66 20 28 62 69 43 6c | 72 55 73 65 64 20 3e 20 |if (biCl|rUsed > |
|00003150| 32 35 36 29 0a 58 20 20 | 20 20 20 20 45 52 52 45 |256).X | ERRE|
|00003160| 58 49 54 28 63 69 6e 66 | 6f 2c 20 4a 45 52 52 5f |XIT(cinf|o, JERR_|
|00003170| 42 4d 50 5f 42 41 44 43 | 4d 41 50 29 3b 0a 58 20 |BMP_BADC|MAP);.X |
|00003180| 20 20 20 2f 2a 20 41 6c | 6c 6f 63 61 74 65 20 73 | /* Al|locate s|
|00003190| 70 61 63 65 20 74 6f 20 | 73 74 6f 72 65 20 74 68 |pace to |store th|
|000031a0| 65 20 63 6f 6c 6f 72 6d | 61 70 20 2a 2f 0a 58 20 |e colorm|ap */.X |
|000031b0| 20 20 20 73 6f 75 72 63 | 65 2d 3e 63 6f 6c 6f 72 | sourc|e->color|
|000031c0| 6d 61 70 20 3d 20 28 2a | 63 69 6e 66 6f 2d 3e 6d |map = (*|cinfo->m|
|000031d0| 65 6d 2d 3e 61 6c 6c 6f | 63 5f 73 61 72 72 61 79 |em->allo|c_sarray|
|000031e0| 29 0a 58 20 20 20 20 20 | 20 28 28 6a 5f 63 6f 6d |).X | ((j_com|
|000031f0| 6d 6f 6e 5f 70 74 72 29 | 20 63 69 6e 66 6f 2c 20 |mon_ptr)| cinfo, |
|00003200| 4a 50 4f 4f 4c 5f 49 4d | 41 47 45 2c 0a 58 20 20 |JPOOL_IM|AGE,.X |
|00003210| 20 20 20 20 20 28 4a 44 | 49 4d 45 4e 53 49 4f 4e | (JD|IMENSION|
|00003220| 29 20 62 69 43 6c 72 55 | 73 65 64 2c 20 28 4a 44 |) biClrU|sed, (JD|
|00003230| 49 4d 45 4e 53 49 4f 4e | 29 20 33 29 3b 0a 58 20 |IMENSION|) 3);.X |
|00003240| 20 20 20 2f 2a 20 61 6e | 64 20 72 65 61 64 20 69 | /* an|d read i|
|00003250| 74 20 66 72 6f 6d 20 74 | 68 65 20 66 69 6c 65 20 |t from t|he file |
|00003260| 2a 2f 0a 58 20 20 20 20 | 72 65 61 64 5f 63 6f 6c |*/.X |read_col|
|00003270| 6f 72 6d 61 70 28 73 6f | 75 72 63 65 2c 20 28 69 |ormap(so|urce, (i|
|00003280| 6e 74 29 20 62 69 43 6c | 72 55 73 65 64 2c 20 6d |nt) biCl|rUsed, m|
|00003290| 61 70 65 6e 74 72 79 73 | 69 7a 65 29 3b 0a 58 20 |apentrys|ize);.X |
|000032a0| 20 7d 0a 58 0a 58 20 20 | 2f 2a 20 43 6f 6d 70 75 | }.X.X |/* Compu|
|000032b0| 74 65 20 72 6f 77 20 77 | 69 64 74 68 20 69 6e 20 |te row w|idth in |
|000032c0| 66 69 6c 65 2c 20 69 6e | 63 6c 75 64 69 6e 67 20 |file, in|cluding |
|000032d0| 70 61 64 64 69 6e 67 20 | 74 6f 20 34 2d 62 79 74 |padding |to 4-byt|
|000032e0| 65 20 62 6f 75 6e 64 61 | 72 79 20 2a 2f 0a 58 20 |e bounda|ry */.X |
|000032f0| 20 69 66 20 28 73 6f 75 | 72 63 65 2d 3e 62 69 74 | if (sou|rce->bit|
|00003300| 73 5f 70 65 72 5f 70 69 | 78 65 6c 20 3d 3d 20 32 |s_per_pi|xel == 2|
|00003310| 34 29 0a 58 20 20 20 20 | 72 6f 77 5f 77 69 64 74 |4).X |row_widt|
|00003320| 68 20 3d 20 28 4a 44 49 | 4d 45 4e 53 49 4f 4e 29 |h = (JDI|MENSION)|
|00003330| 20 28 62 69 57 69 64 74 | 68 20 2a 20 33 29 3b 0a | (biWidt|h * 3);.|
|00003340| 58 20 20 65 6c 73 65 0a | 58 20 20 20 20 72 6f 77 |X else.|X row|
|00003350| 5f 77 69 64 74 68 20 3d | 20 28 4a 44 49 4d 45 4e |_width =| (JDIMEN|
|00003360| 53 49 4f 4e 29 20 62 69 | 57 69 64 74 68 3b 0a 58 |SION) bi|Width;.X|
|00003370| 20 20 77 68 69 6c 65 20 | 28 28 72 6f 77 5f 77 69 | while |((row_wi|
|00003380| 64 74 68 20 26 20 33 29 | 20 21 3d 20 30 29 20 72 |dth & 3)| != 0) r|
|00003390| 6f 77 5f 77 69 64 74 68 | 2b 2b 3b 0a 58 20 20 73 |ow_width|++;.X s|
|000033a0| 6f 75 72 63 65 2d 3e 72 | 6f 77 5f 77 69 64 74 68 |ource->r|ow_width|
|000033b0| 20 3d 20 72 6f 77 5f 77 | 69 64 74 68 3b 0a 58 0a | = row_w|idth;.X.|
|000033c0| 58 20 20 2f 2a 20 41 6c | 6c 6f 63 61 74 65 20 73 |X /* Al|locate s|
|000033d0| 70 61 63 65 20 66 6f 72 | 20 69 6e 76 65 72 73 69 |pace for| inversi|
|000033e0| 6f 6e 20 61 72 72 61 79 | 2c 20 70 72 65 70 61 72 |on array|, prepar|
|000033f0| 65 20 66 6f 72 20 70 72 | 65 6c 6f 61 64 20 70 61 |e for pr|eload pa|
|00003400| 73 73 20 2a 2f 0a 58 20 | 20 73 6f 75 72 63 65 2d |ss */.X | source-|
|00003410| 3e 77 68 6f 6c 65 5f 69 | 6d 61 67 65 20 3d 20 28 |>whole_i|mage = (|
|00003420| 2a 63 69 6e 66 6f 2d 3e | 6d 65 6d 2d 3e 72 65 71 |*cinfo->|mem->req|
|00003430| 75 65 73 74 5f 76 69 72 | 74 5f 73 61 72 72 61 79 |uest_vir|t_sarray|
|00003440| 29 0a 58 20 20 20 20 28 | 28 6a 5f 63 6f 6d 6d 6f |).X (|(j_commo|
|00003450| 6e 5f 70 74 72 29 20 63 | 69 6e 66 6f 2c 20 4a 50 |n_ptr) c|info, JP|
|00003460| 4f 4f 4c 5f 49 4d 41 47 | 45 2c 0a 58 20 20 20 20 |OOL_IMAG|E,.X |
|00003470| 20 72 6f 77 5f 77 69 64 | 74 68 2c 20 28 4a 44 49 | row_wid|th, (JDI|
|00003480| 4d 45 4e 53 49 4f 4e 29 | 20 62 69 48 65 69 67 68 |MENSION)| biHeigh|
|00003490| 74 2c 20 28 4a 44 49 4d | 45 4e 53 49 4f 4e 29 20 |t, (JDIM|ENSION) |
|000034a0| 31 29 3b 0a 58 20 20 73 | 6f 75 72 63 65 2d 3e 70 |1);.X s|ource->p|
|000034b0| 75 62 2e 67 65 74 5f 70 | 69 78 65 6c 5f 72 6f 77 |ub.get_p|ixel_row|
|000034c0| 73 20 3d 20 70 72 65 6c | 6f 61 64 5f 69 6d 61 67 |s = prel|oad_imag|
|000034d0| 65 3b 0a 58 20 20 69 66 | 20 28 63 69 6e 66 6f 2d |e;.X if| (cinfo-|
|000034e0| 3e 70 72 6f 67 72 65 73 | 73 20 21 3d 20 4e 55 4c |>progres|s != NUL|
|000034f0| 4c 29 20 7b 0a 58 20 20 | 20 20 63 64 5f 70 72 6f |L) {.X | cd_pro|
|00003500| 67 72 65 73 73 5f 70 74 | 72 20 70 72 6f 67 72 65 |gress_pt|r progre|
|00003510| 73 73 20 3d 20 28 63 64 | 5f 70 72 6f 67 72 65 73 |ss = (cd|_progres|
|00003520| 73 5f 70 74 72 29 20 63 | 69 6e 66 6f 2d 3e 70 72 |s_ptr) c|info->pr|
|00003530| 6f 67 72 65 73 73 3b 0a | 58 20 20 20 20 70 72 6f |ogress;.|X pro|
|00003540| 67 72 65 73 73 2d 3e 74 | 6f 74 61 6c 5f 65 78 74 |gress->t|otal_ext|
|00003550| 72 61 5f 70 61 73 73 65 | 73 2b 2b 3b 20 2f 2a 20 |ra_passe|s++; /* |
|00003560| 63 6f 75 6e 74 20 66 69 | 6c 65 20 69 6e 70 75 74 |count fi|le input|
|00003570| 20 61 73 20 73 65 70 61 | 72 61 74 65 20 70 61 73 | as sepa|rate pas|
|00003580| 73 20 2a 2f 0a 58 20 20 | 7d 0a 58 0a 58 20 20 2f |s */.X |}.X.X /|
|00003590| 2a 20 41 6c 6c 6f 63 61 | 74 65 20 6f 6e 65 2d 72 |* Alloca|te one-r|
|000035a0| 6f 77 20 62 75 66 66 65 | 72 20 66 6f 72 20 72 65 |ow buffe|r for re|
|000035b0| 74 75 72 6e 65 64 20 64 | 61 74 61 20 2a 2f 0a 58 |turned d|ata */.X|
|000035c0| 20 20 73 6f 75 72 63 65 | 2d 3e 70 75 62 2e 62 75 | source|->pub.bu|
|000035d0| 66 66 65 72 20 3d 20 28 | 2a 63 69 6e 66 6f 2d 3e |ffer = (|*cinfo->|
|000035e0| 6d 65 6d 2d 3e 61 6c 6c | 6f 63 5f 73 61 72 72 61 |mem->all|oc_sarra|
|000035f0| 79 29 0a 58 20 20 20 20 | 28 28 6a 5f 63 6f 6d 6d |y).X |((j_comm|
|00003600| 6f 6e 5f 70 74 72 29 20 | 63 69 6e 66 6f 2c 20 4a |on_ptr) |cinfo, J|
|00003610| 50 4f 4f 4c 5f 49 4d 41 | 47 45 2c 0a 58 20 20 20 |POOL_IMA|GE,.X |
|00003620| 20 20 28 4a 44 49 4d 45 | 4e 53 49 4f 4e 29 20 28 | (JDIME|NSION) (|
|00003630| 62 69 57 69 64 74 68 20 | 2a 20 33 29 2c 20 28 4a |biWidth |* 3), (J|
|00003640| 44 49 4d 45 4e 53 49 4f | 4e 29 20 31 29 3b 0a 58 |DIMENSIO|N) 1);.X|
|00003650| 20 20 73 6f 75 72 63 65 | 2d 3e 70 75 62 2e 62 75 | source|->pub.bu|
|00003660| 66 66 65 72 5f 68 65 69 | 67 68 74 20 3d 20 31 3b |ffer_hei|ght = 1;|
|00003670| 0a 58 0a 58 20 20 63 69 | 6e 66 6f 2d 3e 69 6e 5f |.X.X ci|nfo->in_|
|00003680| 63 6f 6c 6f 72 5f 73 70 | 61 63 65 20 3d 20 4a 43 |color_sp|ace = JC|
|00003690| 53 5f 52 47 42 3b 0a 58 | 20 20 63 69 6e 66 6f 2d |S_RGB;.X| cinfo-|
|000036a0| 3e 69 6e 70 75 74 5f 63 | 6f 6d 70 6f 6e 65 6e 74 |>input_c|omponent|
|000036b0| 73 20 3d 20 33 3b 0a 58 | 20 20 63 69 6e 66 6f 2d |s = 3;.X| cinfo-|
|000036c0| 3e 64 61 74 61 5f 70 72 | 65 63 69 73 69 6f 6e 20 |>data_pr|ecision |
|000036d0| 3d 20 38 3b 0a 58 20 20 | 63 69 6e 66 6f 2d 3e 69 |= 8;.X |cinfo->i|
|000036e0| 6d 61 67 65 5f 77 69 64 | 74 68 20 3d 20 28 4a 44 |mage_wid|th = (JD|
|000036f0| 49 4d 45 4e 53 49 4f 4e | 29 20 62 69 57 69 64 74 |IMENSION|) biWidt|
|00003700| 68 3b 0a 58 20 20 63 69 | 6e 66 6f 2d 3e 69 6d 61 |h;.X ci|nfo->ima|
|00003710| 67 65 5f 68 65 69 67 68 | 74 20 3d 20 28 4a 44 49 |ge_heigh|t = (JDI|
|00003720| 4d 45 4e 53 49 4f 4e 29 | 20 62 69 48 65 69 67 68 |MENSION)| biHeigh|
|00003730| 74 3b 0a 58 7d 0a 58 0a | 58 0a 58 2f 2a 0a 58 20 |t;.X}.X.|X.X/*.X |
|00003740| 2a 20 46 69 6e 69 73 68 | 20 75 70 20 61 74 20 74 |* Finish| up at t|
|00003750| 68 65 20 65 6e 64 20 6f | 66 20 74 68 65 20 66 69 |he end o|f the fi|
|00003760| 6c 65 2e 0a 58 20 2a 2f | 0a 58 0a 58 4d 45 54 48 |le..X */|.X.XMETH|
|00003770| 4f 44 44 45 46 20 76 6f | 69 64 0a 58 66 69 6e 69 |ODDEF vo|id.Xfini|
|00003780| 73 68 5f 69 6e 70 75 74 | 5f 62 6d 70 20 28 6a 5f |sh_input|_bmp (j_|
|00003790| 63 6f 6d 70 72 65 73 73 | 5f 70 74 72 20 63 69 6e |compress|_ptr cin|
|000037a0| 66 6f 2c 20 63 6a 70 65 | 67 5f 73 6f 75 72 63 65 |fo, cjpe|g_source|
|000037b0| 5f 70 74 72 20 73 69 6e | 66 6f 29 0a 58 7b 0a 58 |_ptr sin|fo).X{.X|
|000037c0| 20 20 2f 2a 20 6e 6f 20 | 77 6f 72 6b 20 2a 2f 0a | /* no |work */.|
|000037d0| 58 7d 0a 58 0a 58 0a 58 | 2f 2a 0a 58 20 2a 20 54 |X}.X.X.X|/*.X * T|
|000037e0| 68 65 20 6d 6f 64 75 6c | 65 20 73 65 6c 65 63 74 |he modul|e select|
|000037f0| 69 6f 6e 20 72 6f 75 74 | 69 6e 65 20 66 6f 72 20 |ion rout|ine for |
|00003800| 42 4d 50 20 66 6f 72 6d | 61 74 20 69 6e 70 75 74 |BMP form|at input|
|00003810| 2e 0a 58 20 2a 2f 0a 58 | 0a 58 47 4c 4f 42 41 4c |..X */.X|.XGLOBAL|
|00003820| 20 63 6a 70 65 67 5f 73 | 6f 75 72 63 65 5f 70 74 | cjpeg_s|ource_pt|
|00003830| 72 0a 58 6a 69 6e 69 74 | 5f 72 65 61 64 5f 62 6d |r.Xjinit|_read_bm|
|00003840| 70 20 28 6a 5f 63 6f 6d | 70 72 65 73 73 5f 70 74 |p (j_com|press_pt|
|00003850| 72 20 63 69 6e 66 6f 29 | 0a 58 7b 0a 58 20 20 62 |r cinfo)|.X{.X b|
|00003860| 6d 70 5f 73 6f 75 72 63 | 65 5f 70 74 72 20 73 6f |mp_sourc|e_ptr so|
|00003870| 75 72 63 65 3b 0a 58 0a | 58 20 20 2f 2a 20 43 72 |urce;.X.|X /* Cr|
|00003880| 65 61 74 65 20 6d 6f 64 | 75 6c 65 20 69 6e 74 65 |eate mod|ule inte|
|00003890| 72 66 61 63 65 20 6f 62 | 6a 65 63 74 20 2a 2f 0a |rface ob|ject */.|
|000038a0| 58 20 20 73 6f 75 72 63 | 65 20 3d 20 28 62 6d 70 |X sourc|e = (bmp|
|000038b0| 5f 73 6f 75 72 63 65 5f | 70 74 72 29 0a 58 20 20 |_source_|ptr).X |
|000038c0| 20 20 20 20 28 2a 63 69 | 6e 66 6f 2d 3e 6d 65 6d | (*ci|nfo->mem|
|000038d0| 2d 3e 61 6c 6c 6f 63 5f | 73 6d 61 6c 6c 29 20 28 |->alloc_|small) (|
|000038e0| 28 6a 5f 63 6f 6d 6d 6f | 6e 5f 70 74 72 29 20 63 |(j_commo|n_ptr) c|
|000038f0| 69 6e 66 6f 2c 20 4a 50 | 4f 4f 4c 5f 49 4d 41 47 |info, JP|OOL_IMAG|
|00003900| 45 2c 0a 58 09 09 09 09 | 20 20 53 49 5a 45 4f 46 |E,.X....| SIZEOF|
|00003910| 28 62 6d 70 5f 73 6f 75 | 72 63 65 5f 73 74 72 75 |(bmp_sou|rce_stru|
|00003920| 63 74 29 29 3b 0a 58 20 | 20 73 6f 75 72 63 65 2d |ct));.X | source-|
|00003930| 3e 63 69 6e 66 6f 20 3d | 20 63 69 6e 66 6f 3b 09 |>cinfo =| cinfo;.|
|00003940| 2f 2a 20 6d 61 6b 65 20 | 62 61 63 6b 20 6c 69 6e |/* make |back lin|
|00003950| 6b 20 66 6f 72 20 73 75 | 62 72 6f 75 74 69 6e 65 |k for su|broutine|
|00003960| 73 20 2a 2f 0a 58 20 20 | 2f 2a 20 46 69 6c 6c 20 |s */.X |/* Fill |
|00003970| 69 6e 20 6d 65 74 68 6f | 64 20 70 74 72 73 2c 20 |in metho|d ptrs, |
|00003980| 65 78 63 65 70 74 20 67 | 65 74 5f 70 69 78 65 6c |except g|et_pixel|
|00003990| 5f 72 6f 77 73 20 77 68 | 69 63 68 20 73 74 61 72 |_rows wh|ich star|
|000039a0| 74 5f 69 6e 70 75 74 20 | 73 65 74 73 20 2a 2f 0a |t_input |sets */.|
|000039b0| 58 20 20 73 6f 75 72 63 | 65 2d 3e 70 75 62 2e 73 |X sourc|e->pub.s|
|000039c0| 74 61 72 74 5f 69 6e 70 | 75 74 20 3d 20 73 74 61 |tart_inp|ut = sta|
|000039d0| 72 74 5f 69 6e 70 75 74 | 5f 62 6d 70 3b 0a 58 20 |rt_input|_bmp;.X |
|000039e0| 20 73 6f 75 72 63 65 2d | 3e 70 75 62 2e 66 69 6e | source-|>pub.fin|
|000039f0| 69 73 68 5f 69 6e 70 75 | 74 20 3d 20 66 69 6e 69 |ish_inpu|t = fini|
|00003a00| 73 68 5f 69 6e 70 75 74 | 5f 62 6d 70 3b 0a 58 0a |sh_input|_bmp;.X.|
|00003a10| 58 20 20 72 65 74 75 72 | 6e 20 28 63 6a 70 65 67 |X retur|n (cjpeg|
|00003a20| 5f 73 6f 75 72 63 65 5f | 70 74 72 29 20 73 6f 75 |_source_|ptr) sou|
|00003a30| 72 63 65 3b 0a 58 7d 0a | 58 0a 58 23 65 6e 64 69 |rce;.X}.|X.X#endi|
|00003a40| 66 20 2f 2a 20 42 4d 50 | 5f 53 55 50 50 4f 52 54 |f /* BMP|_SUPPORT|
|00003a50| 45 44 20 2a 2f 0a 45 4e | 44 5f 4f 46 5f 46 49 4c |ED */.EN|D_OF_FIL|
|00003a60| 45 0a 20 20 69 66 20 74 | 65 73 74 20 31 33 32 34 |E. if t|est 1324|
|00003a70| 36 20 2d 6e 65 20 60 77 | 63 20 2d 63 20 3c 27 72 |6 -ne `w|c -c <'r|
|00003a80| 64 62 6d 70 2e 63 27 60 | 3b 20 74 68 65 6e 0a 20 |dbmp.c'`|; then. |
|00003a90| 20 20 20 65 63 68 6f 20 | 73 68 61 72 3a 20 5c 22 | echo |shar: \"|
|00003aa0| 27 72 64 62 6d 70 2e 63 | 27 5c 22 20 75 6e 70 61 |'rdbmp.c|'\" unpa|
|00003ab0| 63 6b 65 64 20 77 69 74 | 68 20 77 72 6f 6e 67 20 |cked wit|h wrong |
|00003ac0| 73 69 7a 65 21 0a 20 20 | 66 69 0a 20 20 23 20 65 |size!. |fi. # e|
|00003ad0| 6e 64 20 6f 66 20 27 72 | 64 62 6d 70 2e 63 27 0a |nd of 'r|dbmp.c'.|
|00003ae0| 66 69 0a 69 66 20 74 65 | 73 74 20 2d 66 20 27 73 |fi.if te|st -f 's|
|00003af0| 74 72 75 63 74 75 72 65 | 2e 64 6f 63 27 20 2d 61 |tructure|.doc' -a|
|00003b00| 20 22 24 7b 31 7d 22 20 | 21 3d 20 22 2d 63 22 20 | "${1}" |!= "-c" |
|00003b10| 3b 20 74 68 65 6e 20 0a | 20 20 65 63 68 6f 20 73 |; then .| echo s|
|00003b20| 68 61 72 3a 20 57 69 6c | 6c 20 6e 6f 74 20 63 6c |har: Wil|l not cl|
|00003b30| 6f 62 62 65 72 20 65 78 | 69 73 74 69 6e 67 20 66 |obber ex|isting f|
|00003b40| 69 6c 65 20 5c 22 27 73 | 74 72 75 63 74 75 72 65 |ile \"'s|tructure|
|00003b50| 2e 64 6f 63 27 5c 22 0a | 65 6c 73 65 0a 20 20 65 |.doc'\".|else. e|
|00003b60| 63 68 6f 20 73 68 61 72 | 3a 20 45 78 74 72 61 63 |cho shar|: Extrac|
|00003b70| 74 69 6e 67 20 5c 22 27 | 73 74 72 75 63 74 75 72 |ting \"'|structur|
|00003b80| 65 2e 64 6f 63 27 5c 22 | 20 5c 28 34 36 39 36 33 |e.doc'\"| \(46963|
|00003b90| 20 63 68 61 72 61 63 74 | 65 72 73 5c 29 0a 20 20 | charact|ers\). |
|00003ba0| 73 65 64 20 22 73 2f 5e | 58 2f 2f 22 20 3e 27 73 |sed "s/^|X//" >'s|
|00003bb0| 74 72 75 63 74 75 72 65 | 2e 64 6f 63 27 20 3c 3c |tructure|.doc' <<|
|00003bc0| 27 45 4e 44 5f 4f 46 5f | 46 49 4c 45 27 0a 58 49 |'END_OF_|FILE'.XI|
|00003bd0| 4a 47 20 4a 50 45 47 20 | 4c 49 42 52 41 52 59 3a |JG JPEG |LIBRARY:|
|00003be0| 20 20 53 59 53 54 45 4d | 20 41 52 43 48 49 54 45 | SYSTEM| ARCHITE|
|00003bf0| 43 54 55 52 45 0a 58 0a | 58 43 6f 70 79 72 69 67 |CTURE.X.|XCopyrig|
|00003c00| 68 74 20 28 43 29 20 31 | 39 39 31 2d 31 39 39 34 |ht (C) 1|991-1994|
|00003c10| 2c 20 54 68 6f 6d 61 73 | 20 47 2e 20 4c 61 6e 65 |, Thomas| G. Lane|
|00003c20| 2e 0a 58 54 68 69 73 20 | 66 69 6c 65 20 69 73 20 |..XThis |file is |
|00003c30| 70 61 72 74 20 6f 66 20 | 74 68 65 20 49 6e 64 65 |part of |the Inde|
|00003c40| 70 65 6e 64 65 6e 74 20 | 4a 50 45 47 20 47 72 6f |pendent |JPEG Gro|
|00003c50| 75 70 27 73 20 73 6f 66 | 74 77 61 72 65 2e 0a 58 |up's sof|tware..X|
|00003c60| 46 6f 72 20 63 6f 6e 64 | 69 74 69 6f 6e 73 20 6f |For cond|itions o|
|00003c70| 66 20 64 69 73 74 72 69 | 62 75 74 69 6f 6e 20 61 |f distri|bution a|
|00003c80| 6e 64 20 75 73 65 2c 20 | 73 65 65 20 74 68 65 20 |nd use, |see the |
|00003c90| 61 63 63 6f 6d 70 61 6e | 79 69 6e 67 20 52 45 41 |accompan|ying REA|
|00003ca0| 44 4d 45 20 66 69 6c 65 | 2e 0a 58 0a 58 0a 58 54 |DME file|..X.X.XT|
|00003cb0| 68 69 73 20 66 69 6c 65 | 20 70 72 6f 76 69 64 65 |his file| provide|
|00003cc0| 73 20 61 6e 20 6f 76 65 | 72 76 69 65 77 20 6f 66 |s an ove|rview of|
|00003cd0| 20 74 68 65 20 61 72 63 | 68 69 74 65 63 74 75 72 | the arc|hitectur|
|00003ce0| 65 20 6f 66 20 74 68 65 | 20 49 4a 47 20 4a 50 45 |e of the| IJG JPE|
|00003cf0| 47 20 73 6f 66 74 77 61 | 72 65 3b 0a 58 74 68 61 |G softwa|re;.Xtha|
|00003d00| 74 20 69 73 2c 20 74 68 | 65 20 66 75 6e 63 74 69 |t is, th|e functi|
|00003d10| 6f 6e 73 20 6f 66 20 74 | 68 65 20 76 61 72 69 6f |ons of t|he vario|
|00003d20| 75 73 20 6d 6f 64 75 6c | 65 73 20 69 6e 20 74 68 |us modul|es in th|
|00003d30| 65 20 73 79 73 74 65 6d | 20 61 6e 64 20 74 68 65 |e system| and the|
|00003d40| 20 69 6e 74 65 72 66 61 | 63 65 73 0a 58 62 65 74 | interfa|ces.Xbet|
|00003d50| 77 65 65 6e 20 6d 6f 64 | 75 6c 65 73 2e 20 20 46 |ween mod|ules. F|
|00003d60| 6f 72 20 6d 6f 72 65 20 | 70 72 65 63 69 73 65 20 |or more |precise |
|00003d70| 64 65 74 61 69 6c 73 20 | 61 62 6f 75 74 20 61 6e |details |about an|
|00003d80| 79 20 64 61 74 61 20 73 | 74 72 75 63 74 75 72 65 |y data s|tructure|
|00003d90| 20 6f 72 20 63 61 6c 6c | 69 6e 67 0a 58 63 6f 6e | or call|ing.Xcon|
|00003da0| 76 65 6e 74 69 6f 6e 2c | 20 73 65 65 20 74 68 65 |vention,| see the|
|00003db0| 20 69 6e 63 6c 75 64 65 | 20 66 69 6c 65 73 20 61 | include| files a|
|00003dc0| 6e 64 20 63 6f 6d 6d 65 | 6e 74 73 20 69 6e 20 74 |nd comme|nts in t|
|00003dd0| 68 65 20 73 6f 75 72 63 | 65 20 63 6f 64 65 2e 0a |he sourc|e code..|
|00003de0| 58 0a 58 57 65 20 61 73 | 73 75 6d 65 20 74 68 61 |X.XWe as|sume tha|
|00003df0| 74 20 74 68 65 20 72 65 | 61 64 65 72 20 69 73 20 |t the re|ader is |
|00003e00| 61 6c 72 65 61 64 79 20 | 73 6f 6d 65 77 68 61 74 |already |somewhat|
|00003e10| 20 66 61 6d 69 6c 69 61 | 72 20 77 69 74 68 20 74 | familia|r with t|
|00003e20| 68 65 20 4a 50 45 47 20 | 73 74 61 6e 64 61 72 64 |he JPEG |standard|
|00003e30| 2e 0a 58 54 68 65 20 52 | 45 41 44 4d 45 20 66 69 |..XThe R|EADME fi|
|00003e40| 6c 65 20 69 6e 63 6c 75 | 64 65 73 20 72 65 66 65 |le inclu|des refe|
|00003e50| 72 65 6e 63 65 73 20 66 | 6f 72 20 6c 65 61 72 6e |rences f|or learn|
|00003e60| 69 6e 67 20 61 62 6f 75 | 74 20 4a 50 45 47 2e 20 |ing abou|t JPEG. |
|00003e70| 20 54 68 65 20 66 69 6c | 65 0a 58 6c 69 62 6a 70 | The fil|e.Xlibjp|
|00003e80| 65 67 2e 64 6f 63 20 64 | 65 73 63 72 69 62 65 73 |eg.doc d|escribes|
|00003e90| 20 74 68 65 20 6c 69 62 | 72 61 72 79 20 66 72 6f | the lib|rary fro|
|00003ea0| 6d 20 74 68 65 20 76 69 | 65 77 70 6f 69 6e 74 20 |m the vi|ewpoint |
|00003eb0| 6f 66 20 61 6e 20 61 70 | 70 6c 69 63 61 74 69 6f |of an ap|plicatio|
|00003ec0| 6e 0a 58 70 72 6f 67 72 | 61 6d 6d 65 72 20 75 73 |n.Xprogr|ammer us|
|00003ed0| 69 6e 67 20 74 68 65 20 | 6c 69 62 72 61 72 79 3b |ing the |library;|
|00003ee0| 20 69 74 27 73 20 62 65 | 73 74 20 74 6f 20 72 65 | it's be|st to re|
|00003ef0| 61 64 20 74 68 61 74 20 | 66 69 6c 65 20 62 65 66 |ad that |file bef|
|00003f00| 6f 72 65 20 74 68 69 73 | 20 6f 6e 65 2e 0a 58 41 |ore this| one..XA|
|00003f10| 6c 73 6f 2c 20 74 68 65 | 20 66 69 6c 65 20 63 6f |lso, the| file co|
|00003f20| 64 65 72 75 6c 65 73 2e | 64 6f 63 20 64 65 73 63 |derules.|doc desc|
|00003f30| 72 69 62 65 73 20 74 68 | 65 20 63 6f 64 69 6e 67 |ribes th|e coding|
|00003f40| 20 73 74 79 6c 65 20 63 | 6f 6e 76 65 6e 74 69 6f | style c|onventio|
|00003f50| 6e 73 20 77 65 20 75 73 | 65 2e 0a 58 0a 58 49 6e |ns we us|e..X.XIn|
|00003f60| 20 74 68 69 73 20 64 6f | 63 75 6d 65 6e 74 2c 20 | this do|cument, |
|00003f70| 4a 50 45 47 2d 73 70 65 | 63 69 66 69 63 20 74 65 |JPEG-spe|cific te|
|00003f80| 72 6d 69 6e 6f 6c 6f 67 | 79 20 66 6f 6c 6c 6f 77 |rminolog|y follow|
|00003f90| 73 20 74 68 65 20 4a 50 | 45 47 20 73 74 61 6e 64 |s the JP|EG stand|
|00003fa0| 61 72 64 3a 0a 58 20 20 | 41 20 22 63 6f 6d 70 6f |ard:.X |A "compo|
|00003fb0| 6e 65 6e 74 22 20 6d 65 | 61 6e 73 20 61 20 63 6f |nent" me|ans a co|
|00003fc0| 6c 6f 72 20 63 68 61 6e | 6e 65 6c 2c 20 65 2e 67 |lor chan|nel, e.g|
|00003fd0| 2e 2c 20 52 65 64 20 6f | 72 20 4c 75 6d 69 6e 61 |., Red o|r Lumina|
|00003fe0| 6e 63 65 2e 0a 58 20 20 | 41 20 22 73 61 6d 70 6c |nce..X |A "sampl|
|00003ff0| 65 22 20 69 73 20 61 20 | 73 69 6e 67 6c 65 20 63 |e" is a |single c|
|00004000| 6f 6d 70 6f 6e 65 6e 74 | 20 76 61 6c 75 65 20 28 |omponent| value (|
|00004010| 69 2e 65 2e 2c 20 6f 6e | 65 20 6e 75 6d 62 65 72 |i.e., on|e number|
|00004020| 20 69 6e 20 74 68 65 20 | 69 6d 61 67 65 20 64 61 | in the |image da|
|00004030| 74 61 29 2e 0a 58 20 20 | 41 20 22 63 6f 65 66 66 |ta)..X |A "coeff|
|00004040| 69 63 69 65 6e 74 22 20 | 69 73 20 61 20 66 72 65 |icient" |is a fre|
|00004050| 71 75 65 6e 63 79 20 63 | 6f 65 66 66 69 63 69 65 |quency c|oefficie|
|00004060| 6e 74 20 28 61 20 44 43 | 54 20 74 72 61 6e 73 66 |nt (a DC|T transf|
|00004070| 6f 72 6d 20 6f 75 74 70 | 75 74 20 6e 75 6d 62 65 |orm outp|ut numbe|
|00004080| 72 29 2e 0a 58 20 20 41 | 20 22 62 6c 6f 63 6b 22 |r)..X A| "block"|
|00004090| 20 69 73 20 61 6e 20 38 | 78 38 20 67 72 6f 75 70 | is an 8|x8 group|
|000040a0| 20 6f 66 20 73 61 6d 70 | 6c 65 73 20 6f 72 20 63 | of samp|les or c|
|000040b0| 6f 65 66 66 69 63 69 65 | 6e 74 73 2e 0a 58 20 20 |oefficie|nts..X |
|000040c0| 41 6e 20 22 4d 43 55 22 | 20 28 6d 69 6e 69 6d 75 |An "MCU"| (minimu|
|000040d0| 6d 20 63 6f 64 65 64 20 | 75 6e 69 74 29 20 69 73 |m coded |unit) is|
|000040e0| 20 61 6e 20 69 6e 74 65 | 72 6c 65 61 76 65 64 20 | an inte|rleaved |
|000040f0| 73 65 74 20 6f 66 20 62 | 6c 6f 63 6b 73 20 6f 66 |set of b|locks of|
|00004100| 20 73 69 7a 65 0a 58 09 | 64 65 74 65 72 6d 69 6e | size.X.|determin|
|00004110| 65 64 20 62 79 20 74 68 | 65 20 73 61 6d 70 6c 69 |ed by th|e sampli|
|00004120| 6e 67 20 66 61 63 74 6f | 72 73 2c 20 6f 72 20 61 |ng facto|rs, or a|
|00004130| 20 73 69 6e 67 6c 65 20 | 62 6c 6f 63 6b 20 69 6e | single |block in|
|00004140| 20 61 0a 58 09 6e 6f 6e | 69 6e 74 65 72 6c 65 61 | a.X.non|interlea|
|00004150| 76 65 64 20 73 63 61 6e | 2e 0a 58 57 65 20 64 6f |ved scan|..XWe do|
|00004160| 20 6e 6f 74 20 75 73 65 | 20 74 68 65 20 74 65 72 | not use| the ter|
|00004170| 6d 73 20 22 70 69 78 65 | 6c 22 20 61 6e 64 20 22 |ms "pixe|l" and "|
|00004180| 73 61 6d 70 6c 65 22 20 | 69 6e 74 65 72 63 68 61 |sample" |intercha|
|00004190| 6e 67 65 61 62 6c 79 2e | 20 20 57 68 65 6e 20 77 |ngeably.| When w|
|000041a0| 65 20 73 61 79 0a 58 70 | 69 78 65 6c 2c 20 77 65 |e say.Xp|ixel, we|
|000041b0| 20 6d 65 61 6e 20 61 6e | 20 65 6c 65 6d 65 6e 74 | mean an| element|
|000041c0| 20 6f 66 20 74 68 65 20 | 66 75 6c 6c 2d 73 69 7a | of the |full-siz|
|000041d0| 65 20 69 6d 61 67 65 2c | 20 77 68 69 6c 65 20 61 |e image,| while a|
|000041e0| 20 73 61 6d 70 6c 65 20 | 69 73 20 61 6e 20 65 6c | sample |is an el|
|000041f0| 65 6d 65 6e 74 0a 58 6f | 66 20 74 68 65 20 64 6f |ement.Xo|f the do|
|00004200| 77 6e 73 61 6d 70 6c 65 | 64 20 69 6d 61 67 65 2e |wnsample|d image.|
|00004210| 20 20 54 68 75 73 20 74 | 68 65 20 6e 75 6d 62 65 | Thus t|he numbe|
|00004220| 72 20 6f 66 20 73 61 6d | 70 6c 65 73 20 6d 61 79 |r of sam|ples may|
|00004230| 20 76 61 72 79 20 61 63 | 72 6f 73 73 0a 58 63 6f | vary ac|ross.Xco|
|00004240| 6d 70 6f 6e 65 6e 74 73 | 20 77 68 69 6c 65 20 74 |mponents| while t|
|00004250| 68 65 20 6e 75 6d 62 65 | 72 20 6f 66 20 70 69 78 |he numbe|r of pix|
|00004260| 65 6c 73 20 64 6f 65 73 | 20 6e 6f 74 2e 20 20 28 |els does| not. (|
|00004270| 54 68 69 73 20 74 65 72 | 6d 69 6e 6f 6c 6f 67 79 |This ter|minology|
|00004280| 20 69 73 20 6e 6f 74 20 | 75 73 65 64 0a 58 72 69 | is not |used.Xri|
|00004290| 67 6f 72 6f 75 73 6c 79 | 20 74 68 72 6f 75 67 68 |gorously| through|
|000042a0| 6f 75 74 20 74 68 65 20 | 63 6f 64 65 2c 20 62 75 |out the |code, bu|
|000042b0| 74 20 69 74 20 69 73 20 | 75 73 65 64 20 69 6e 20 |t it is |used in |
|000042c0| 70 6c 61 63 65 73 20 77 | 68 65 72 65 20 63 6f 6e |places w|here con|
|000042d0| 66 75 73 69 6f 6e 20 77 | 6f 75 6c 64 0a 58 6f 74 |fusion w|ould.Xot|
|000042e0| 68 65 72 77 69 73 65 20 | 72 65 73 75 6c 74 2e 29 |herwise |result.)|
|000042f0| 0a 58 0a 58 0a 58 2a 2a | 2a 20 53 79 73 74 65 6d |.X.X.X**|* System|
|00004300| 20 66 65 61 74 75 72 65 | 73 20 2a 2a 2a 0a 58 0a | feature|s ***.X.|
|00004310| 58 54 68 65 20 49 4a 47 | 20 64 69 73 74 72 69 62 |XThe IJG| distrib|
|00004320| 75 74 69 6f 6e 20 63 6f | 6e 74 61 69 6e 73 20 74 |ution co|ntains t|
|00004330| 77 6f 20 70 61 72 74 73 | 3a 0a 58 20 20 2a 20 41 |wo parts|:.X * A|
|00004340| 20 73 75 62 72 6f 75 74 | 69 6e 65 20 6c 69 62 72 | subrout|ine libr|
|00004350| 61 72 79 20 66 6f 72 20 | 4a 50 45 47 20 63 6f 6d |ary for |JPEG com|
|00004360| 70 72 65 73 73 69 6f 6e | 20 61 6e 64 20 64 65 63 |pression| and dec|
|00004370| 6f 6d 70 72 65 73 73 69 | 6f 6e 2e 0a 58 20 20 2a |ompressi|on..X *|
|00004380| 20 63 6a 70 65 67 2f 64 | 6a 70 65 67 2c 20 74 77 | cjpeg/d|jpeg, tw|
|00004390| 6f 20 73 69 6d 70 6c 65 | 20 61 70 70 6c 69 63 61 |o simple| applica|
|000043a0| 74 69 6f 6e 73 20 74 68 | 61 74 20 75 73 65 20 74 |tions th|at use t|
|000043b0| 68 65 20 6c 69 62 72 61 | 72 79 20 74 6f 20 74 72 |he libra|ry to tr|
|000043c0| 61 6e 73 66 6f 72 6d 0a | 58 20 20 20 20 4a 46 49 |ansform.|X JFI|
|000043d0| 46 20 4a 50 45 47 20 66 | 69 6c 65 73 20 74 6f 20 |F JPEG f|iles to |
|000043e0| 61 6e 64 20 66 72 6f 6d | 20 73 65 76 65 72 61 6c |and from| several|
|000043f0| 20 6f 74 68 65 72 20 69 | 6d 61 67 65 20 66 6f 72 | other i|mage for|
|00004400| 6d 61 74 73 2e 0a 58 63 | 6a 70 65 67 2f 64 6a 70 |mats..Xc|jpeg/djp|
|00004410| 65 67 20 61 72 65 20 6f | 66 20 6e 6f 20 67 72 65 |eg are o|f no gre|
|00004420| 61 74 20 69 6e 74 65 6c | 6c 65 63 74 75 61 6c 20 |at intel|lectual |
|00004430| 63 6f 6d 70 6c 65 78 69 | 74 79 3a 20 74 68 65 79 |complexi|ty: they|
|00004440| 20 6d 65 72 65 6c 79 20 | 61 64 64 20 61 20 73 69 | merely |add a si|
|00004450| 6d 70 6c 65 0a 58 63 6f | 6d 6d 61 6e 64 2d 6c 69 |mple.Xco|mmand-li|
|00004460| 6e 65 20 75 73 65 72 20 | 69 6e 74 65 72 66 61 63 |ne user |interfac|
|00004470| 65 20 61 6e 64 20 49 2f | 4f 20 72 6f 75 74 69 6e |e and I/|O routin|
|00004480| 65 73 20 66 6f 72 20 73 | 65 76 65 72 61 6c 20 75 |es for s|everal u|
|00004490| 6e 63 6f 6d 70 72 65 73 | 73 65 64 20 69 6d 61 67 |ncompres|sed imag|
|000044a0| 65 0a 58 66 6f 72 6d 61 | 74 73 2e 20 20 54 68 69 |e.Xforma|ts. Thi|
|000044b0| 73 20 64 6f 63 75 6d 65 | 6e 74 20 63 6f 6e 63 65 |s docume|nt conce|
|000044c0| 6e 74 72 61 74 65 73 20 | 6f 6e 20 74 68 65 20 6c |ntrates |on the l|
|000044d0| 69 62 72 61 72 79 20 69 | 74 73 65 6c 66 2e 0a 58 |ibrary i|tself..X|
|000044e0| 0a 58 57 65 20 64 65 73 | 69 72 65 20 74 68 65 20 |.XWe des|ire the |
|000044f0| 6c 69 62 72 61 72 79 20 | 74 6f 20 62 65 20 63 61 |library |to be ca|
|00004500| 70 61 62 6c 65 20 6f 66 | 20 73 75 70 70 6f 72 74 |pable of| support|
|00004510| 69 6e 67 20 61 6c 6c 20 | 4a 50 45 47 20 62 61 73 |ing all |JPEG bas|
|00004520| 65 6c 69 6e 65 20 61 6e | 64 0a 58 65 78 74 65 6e |eline an|d.Xexten|
|00004530| 64 65 64 20 73 65 71 75 | 65 6e 74 69 61 6c 20 44 |ded sequ|ential D|
|00004540| 43 54 20 70 72 6f 63 65 | 73 73 65 73 2e 20 20 50 |CT proce|sses. P|
|00004550| 72 6f 67 72 65 73 73 69 | 76 65 20 70 72 6f 63 65 |rogressi|ve proce|
|00004560| 73 73 65 73 20 61 72 65 | 20 61 6c 73 6f 20 61 6c |sses are| also al|
|00004570| 6c 6f 77 65 64 0a 58 66 | 6f 72 20 69 6e 20 74 68 |lowed.Xf|or in th|
|00004580| 65 20 73 79 73 74 65 6d | 20 61 72 63 68 69 74 65 |e system| archite|
|00004590| 63 74 75 72 65 2c 20 61 | 6c 74 68 6f 75 67 68 20 |cture, a|lthough |
|000045a0| 74 68 65 79 20 61 72 65 | 20 6e 6f 74 20 6c 69 6b |they are| not lik|
|000045b0| 65 6c 79 20 74 6f 20 62 | 65 0a 58 69 6d 70 6c 65 |ely to b|e.Ximple|
|000045c0| 6d 65 6e 74 65 64 20 76 | 65 72 79 20 73 6f 6f 6e |mented v|ery soon|
|000045d0| 2e 20 20 48 69 65 72 61 | 72 63 68 69 63 61 6c 20 |. Hiera|rchical |
|000045e0| 70 72 6f 63 65 73 73 65 | 73 20 61 72 65 20 6e 6f |processe|s are no|
|000045f0| 74 20 73 75 70 70 6f 72 | 74 65 64 2e 0a 58 0a 58 |t suppor|ted..X.X|
|00004600| 54 68 65 20 6c 69 62 72 | 61 72 79 20 64 6f 65 73 |The libr|ary does|
|00004610| 20 6e 6f 74 20 73 75 70 | 70 6f 72 74 20 74 68 65 | not sup|port the|
|00004620| 20 6c 6f 73 73 6c 65 73 | 73 20 28 73 70 61 74 69 | lossles|s (spati|
|00004630| 61 6c 29 20 4a 50 45 47 | 20 70 72 6f 63 65 73 73 |al) JPEG| process|
|00004640| 2e 20 20 4c 6f 73 73 6c | 65 73 73 0a 58 4a 50 45 |. Lossl|ess.XJPE|
|00004650| 47 20 73 68 61 72 65 73 | 20 6c 69 74 74 6c 65 20 |G shares| little |
|00004660| 6f 72 20 6e 6f 20 63 6f | 64 65 20 77 69 74 68 20 |or no co|de with |
|00004670| 6c 6f 73 73 79 20 4a 50 | 45 47 2c 20 61 6e 64 20 |lossy JP|EG, and |
|00004680| 77 6f 75 6c 64 20 6e 6f | 72 6d 61 6c 6c 79 20 62 |would no|rmally b|
|00004690| 65 20 75 73 65 64 0a 58 | 77 69 74 68 6f 75 74 20 |e used.X|without |
|000046a0| 74 68 65 20 65 78 74 65 | 6e 73 69 76 65 20 70 72 |the exte|nsive pr|
|000046b0| 65 2d 20 61 6e 64 20 70 | 6f 73 74 2d 70 72 6f 63 |e- and p|ost-proc|
|000046c0| 65 73 73 69 6e 67 20 70 | 72 6f 76 69 64 65 64 20 |essing p|rovided |
|000046d0| 62 79 20 74 68 69 73 20 | 6c 69 62 72 61 72 79 2e |by this |library.|
|000046e0| 0a 58 57 65 20 66 65 65 | 6c 20 74 68 61 74 20 6c |.XWe fee|l that l|
|000046f0| 6f 73 73 6c 65 73 73 20 | 4a 50 45 47 20 69 73 20 |ossless |JPEG is |
|00004700| 62 65 74 74 65 72 20 68 | 61 6e 64 6c 65 64 20 62 |better h|andled b|
|00004710| 79 20 61 20 73 65 70 61 | 72 61 74 65 20 6c 69 62 |y a sepa|rate lib|
|00004720| 72 61 72 79 2e 0a 58 0a | 58 57 69 74 68 69 6e 20 |rary..X.|XWithin |
|00004730| 74 68 65 73 65 20 6c 69 | 6d 69 74 73 2c 20 61 6e |these li|mits, an|
|00004740| 79 20 73 65 74 20 6f 66 | 20 63 6f 6d 70 72 65 73 |y set of| compres|
|00004750| 73 69 6f 6e 20 70 61 72 | 61 6d 65 74 65 72 73 20 |sion par|ameters |
|00004760| 61 6c 6c 6f 77 65 64 20 | 62 79 20 74 68 65 20 4a |allowed |by the J|
|00004770| 50 45 47 0a 58 73 70 65 | 63 20 73 68 6f 75 6c 64 |PEG.Xspe|c should|
|00004780| 20 62 65 20 72 65 61 64 | 61 62 6c 65 20 66 6f 72 | be read|able for|
|00004790| 20 64 65 63 6f 6d 70 72 | 65 73 73 69 6f 6e 2e 20 | decompr|ession. |
|000047a0| 20 28 57 65 20 63 61 6e | 20 62 65 20 6d 6f 72 65 | (We can| be more|
|000047b0| 20 72 65 73 74 72 69 63 | 74 69 76 65 20 61 62 6f | restric|tive abo|
|000047c0| 75 74 0a 58 77 68 61 74 | 20 66 6f 72 6d 61 74 73 |ut.Xwhat| formats|
|000047d0| 20 77 65 20 63 61 6e 20 | 67 65 6e 65 72 61 74 65 | we can |generate|
|000047e0| 2e 29 20 20 41 6c 74 68 | 6f 75 67 68 20 74 68 65 |.) Alth|ough the|
|000047f0| 20 73 79 73 74 65 6d 20 | 64 65 73 69 67 6e 20 61 | system |design a|
|00004800| 6c 6c 6f 77 73 20 66 6f | 72 20 61 6c 6c 0a 58 70 |llows fo|r all.Xp|
|00004810| 61 72 61 6d 65 74 65 72 | 20 76 61 6c 75 65 73 2c |arameter| values,|
|00004820| 20 73 6f 6d 65 20 75 6e | 63 6f 6d 6d 6f 6e 20 73 | some un|common s|
|00004830| 65 74 74 69 6e 67 73 20 | 61 72 65 20 6e 6f 74 20 |ettings |are not |
|00004840| 79 65 74 20 69 6d 70 6c | 65 6d 65 6e 74 65 64 20 |yet impl|emented |
|00004850| 61 6e 64 20 6d 61 79 0a | 58 6e 65 76 65 72 20 62 |and may.|Xnever b|
|00004860| 65 3b 20 6e 6f 6e 69 6e | 74 65 67 72 61 6c 20 73 |e; nonin|tegral s|
|00004870| 61 6d 70 6c 69 6e 67 20 | 72 61 74 69 6f 73 20 61 |ampling |ratios a|
|00004880| 72 65 20 74 68 65 20 70 | 72 69 6d 65 20 65 78 61 |re the p|rime exa|
|00004890| 6d 70 6c 65 2e 20 20 46 | 75 72 74 68 65 72 6d 6f |mple. F|urthermo|
|000048a0| 72 65 2c 0a 58 77 65 20 | 74 72 65 61 74 20 38 2d |re,.Xwe |treat 8-|
|000048b0| 62 69 74 20 76 73 2e 20 | 31 32 2d 62 69 74 20 64 |bit vs. |12-bit d|
|000048c0| 61 74 61 20 70 72 65 63 | 69 73 69 6f 6e 20 61 73 |ata prec|ision as|
|000048d0| 20 61 20 63 6f 6d 70 69 | 6c 65 2d 74 69 6d 65 20 | a compi|le-time |
|000048e0| 73 77 69 74 63 68 2c 20 | 6e 6f 74 20 61 0a 58 72 |switch, |not a.Xr|
|000048f0| 75 6e 2d 74 69 6d 65 20 | 6f 70 74 69 6f 6e 2c 20 |un-time |option, |
|00004900| 62 65 63 61 75 73 65 20 | 6d 6f 73 74 20 6d 61 63 |because |most mac|
|00004910| 68 69 6e 65 73 20 63 61 | 6e 20 73 74 6f 72 65 20 |hines ca|n store |
|00004920| 38 2d 62 69 74 20 70 69 | 78 65 6c 73 20 6d 75 63 |8-bit pi|xels muc|
|00004930| 68 20 6d 6f 72 65 0a 58 | 63 6f 6d 70 61 63 74 6c |h more.X|compactl|
|00004940| 79 20 74 68 61 6e 20 31 | 32 2d 62 69 74 2e 0a 58 |y than 1|2-bit..X|
|00004950| 0a 58 46 6f 72 20 6c 65 | 67 61 6c 20 72 65 61 73 |.XFor le|gal reas|
|00004960| 6f 6e 73 2c 20 4a 50 45 | 47 20 61 72 69 74 68 6d |ons, JPE|G arithm|
|00004970| 65 74 69 63 20 63 6f 64 | 69 6e 67 20 69 73 20 6e |etic cod|ing is n|
|00004980| 6f 74 20 63 75 72 72 65 | 6e 74 6c 79 20 73 75 70 |ot curre|ntly sup|
|00004990| 70 6f 72 74 65 64 2c 20 | 62 75 74 0a 58 65 78 74 |ported, |but.Xext|
|000049a0| 65 6e 64 69 6e 67 20 74 | 68 65 20 6c 69 62 72 61 |ending t|he libra|
|000049b0| 72 79 20 74 6f 20 69 6e | 63 6c 75 64 65 20 69 74 |ry to in|clude it|
|000049c0| 20 77 6f 75 6c 64 20 62 | 65 20 73 74 72 61 69 67 | would b|e straig|
|000049d0| 68 74 66 6f 72 77 61 72 | 64 2e 0a 58 0a 58 42 79 |htforwar|d..X.XBy|
|000049e0| 20 69 74 73 65 6c 66 2c | 20 74 68 65 20 6c 69 62 | itself,| the lib|
|000049f0| 72 61 72 79 20 68 61 6e | 64 6c 65 73 20 6f 6e 6c |rary han|dles onl|
|00004a00| 79 20 69 6e 74 65 72 63 | 68 61 6e 67 65 20 4a 50 |y interc|hange JP|
|00004a10| 45 47 20 64 61 74 61 73 | 74 72 65 61 6d 73 20 2d |EG datas|treams -|
|00004a20| 2d 2d 20 69 6e 0a 58 70 | 61 72 74 69 63 75 6c 61 |-- in.Xp|articula|
|00004a30| 72 20 74 68 65 20 77 69 | 64 65 6c 79 20 75 73 65 |r the wi|dely use|
|00004a40| 64 20 4a 46 49 46 20 66 | 69 6c 65 20 66 6f 72 6d |d JFIF f|ile form|
|00004a50| 61 74 2e 20 20 54 68 65 | 20 6c 69 62 72 61 72 79 |at. The| library|
|00004a60| 20 63 61 6e 20 62 65 20 | 75 73 65 64 20 62 79 0a | can be |used by.|
|00004a70| 58 73 75 72 72 6f 75 6e | 64 69 6e 67 20 63 6f 64 |Xsurroun|ding cod|
|00004a80| 65 20 74 6f 20 70 72 6f | 63 65 73 73 20 69 6e 74 |e to pro|cess int|
|00004a90| 65 72 63 68 61 6e 67 65 | 20 6f 72 20 61 62 62 72 |erchange| or abbr|
|00004aa0| 65 76 69 61 74 65 64 20 | 4a 50 45 47 20 64 61 74 |eviated |JPEG dat|
|00004ab0| 61 73 74 72 65 61 6d 73 | 20 74 68 61 74 0a 58 61 |astreams| that.Xa|
|00004ac0| 72 65 20 65 6d 62 65 64 | 64 65 64 20 69 6e 20 6d |re embed|ded in m|
|00004ad0| 6f 72 65 20 63 6f 6d 70 | 6c 65 78 20 66 69 6c 65 |ore comp|lex file|
|00004ae0| 20 66 6f 72 6d 61 74 73 | 2e 20 20 28 46 6f 72 20 | formats|. (For |
|00004af0| 65 78 61 6d 70 6c 65 2c | 20 77 65 20 61 6e 74 69 |example,| we anti|
|00004b00| 63 69 70 61 74 65 20 74 | 68 61 74 0a 58 53 61 6d |cipate t|hat.XSam|
|00004b10| 20 4c 65 66 66 6c 65 72 | 27 73 20 54 49 46 46 20 | Leffler|'s TIFF |
|00004b20| 6c 69 62 72 61 72 79 20 | 77 69 6c 6c 20 75 73 65 |library |will use|
|00004b30| 20 74 68 69 73 20 63 6f | 64 65 20 74 6f 20 73 75 | this co|de to su|
|00004b40| 70 70 6f 72 74 20 74 68 | 65 20 72 65 76 69 73 65 |pport th|e revise|
|00004b50| 64 20 54 49 46 46 0a 58 | 4a 50 45 47 20 66 6f 72 |d TIFF.X|JPEG for|
|00004b60| 6d 61 74 2e 29 0a 58 0a | 58 54 68 65 20 6c 69 62 |mat.).X.|XThe lib|
|00004b70| 72 61 72 79 20 69 6e 63 | 6c 75 64 65 73 20 61 20 |rary inc|ludes a |
|00004b80| 73 75 62 73 74 61 6e 74 | 69 61 6c 20 61 6d 6f 75 |substant|ial amou|
|00004b90| 6e 74 20 6f 66 20 63 6f | 64 65 20 74 68 61 74 20 |nt of co|de that |
|00004ba0| 69 73 20 6e 6f 74 20 63 | 6f 76 65 72 65 64 20 62 |is not c|overed b|
|00004bb0| 79 20 74 68 65 0a 58 4a | 50 45 47 20 73 74 61 6e |y the.XJ|PEG stan|
|00004bc0| 64 61 72 64 20 62 75 74 | 20 69 73 20 6e 65 63 65 |dard but| is nece|
|00004bd0| 73 73 61 72 79 20 66 6f | 72 20 74 79 70 69 63 61 |ssary fo|r typica|
|00004be0| 6c 20 61 70 70 6c 69 63 | 61 74 69 6f 6e 73 20 6f |l applic|ations o|
|00004bf0| 66 20 4a 50 45 47 2e 20 | 20 54 68 65 73 65 0a 58 |f JPEG. | These.X|
|00004c00| 66 75 6e 63 74 69 6f 6e | 73 20 70 72 65 70 72 6f |function|s prepro|
|00004c10| 63 65 73 73 20 74 68 65 | 20 69 6d 61 67 65 20 62 |cess the| image b|
|00004c20| 65 66 6f 72 65 20 4a 50 | 45 47 20 63 6f 6d 70 72 |efore JP|EG compr|
|00004c30| 65 73 73 69 6f 6e 20 6f | 72 20 70 6f 73 74 70 72 |ession o|r postpr|
|00004c40| 6f 63 65 73 73 20 69 74 | 20 61 66 74 65 72 0a 58 |ocess it| after.X|
|00004c50| 64 65 63 6f 6d 70 72 65 | 73 73 69 6f 6e 2e 20 20 |decompre|ssion. |
|00004c60| 54 68 65 79 20 69 6e 63 | 6c 75 64 65 20 63 6f 6c |They inc|lude col|
|00004c70| 6f 72 73 70 61 63 65 20 | 63 6f 6e 76 65 72 73 69 |orspace |conversi|
|00004c80| 6f 6e 2c 20 64 6f 77 6e | 73 61 6d 70 6c 69 6e 67 |on, down|sampling|
|00004c90| 2f 75 70 73 61 6d 70 6c | 69 6e 67 2c 0a 58 61 6e |/upsampl|ing,.Xan|
|00004ca0| 64 20 63 6f 6c 6f 72 20 | 71 75 61 6e 74 69 7a 61 |d color |quantiza|
|00004cb0| 74 69 6f 6e 2e 20 20 54 | 68 69 73 20 63 6f 64 65 |tion. T|his code|
|00004cc0| 20 63 61 6e 20 62 65 20 | 6f 6d 69 74 74 65 64 20 | can be |omitted |
|00004cd0| 69 66 20 6e 6f 74 20 6e | 65 65 64 65 64 2e 0a 58 |if not n|eeded..X|
|00004ce0| 0a 58 41 20 77 69 64 65 | 20 72 61 6e 67 65 20 6f |.XA wide| range o|
|00004cf0| 66 20 71 75 61 6c 69 74 | 79 20 76 73 2e 20 73 70 |f qualit|y vs. sp|
|00004d00| 65 65 64 20 74 72 61 64 | 65 6f 66 66 73 20 61 72 |eed trad|eoffs ar|
|00004d10| 65 20 70 6f 73 73 69 62 | 6c 65 20 69 6e 20 4a 50 |e possib|le in JP|
|00004d20| 45 47 20 70 72 6f 63 65 | 73 73 69 6e 67 2c 0a 58 |EG proce|ssing,.X|
|00004d30| 61 6e 64 20 65 76 65 6e | 20 6d 6f 72 65 20 73 6f |and even| more so|
|00004d40| 20 69 6e 20 64 65 63 6f | 6d 70 72 65 73 73 69 6f | in deco|mpressio|
|00004d50| 6e 20 70 6f 73 74 70 72 | 6f 63 65 73 73 69 6e 67 |n postpr|ocessing|
|00004d60| 2e 20 20 54 68 65 20 64 | 65 63 6f 6d 70 72 65 73 |. The d|ecompres|
|00004d70| 73 69 6f 6e 20 6c 69 62 | 72 61 72 79 0a 58 70 72 |sion lib|rary.Xpr|
|00004d80| 6f 76 69 64 65 73 20 6d | 75 6c 74 69 70 6c 65 20 |ovides m|ultiple |
|00004d90| 69 6d 70 6c 65 6d 65 6e | 74 61 74 69 6f 6e 73 20 |implemen|tations |
|00004da0| 74 68 61 74 20 63 6f 76 | 65 72 20 6d 6f 73 74 20 |that cov|er most |
|00004db0| 6f 66 20 74 68 65 20 75 | 73 65 66 75 6c 20 74 72 |of the u|seful tr|
|00004dc0| 61 64 65 6f 66 66 73 2c | 0a 58 72 61 6e 67 69 6e |adeoffs,|.Xrangin|
|00004dd0| 67 20 66 72 6f 6d 20 76 | 65 72 79 2d 68 69 67 68 |g from v|ery-high|
|00004de0| 2d 71 75 61 6c 69 74 79 | 20 64 6f 77 6e 20 74 6f |-quality| down to|
|00004df0| 20 66 61 73 74 2d 70 72 | 65 76 69 65 77 20 6f 70 | fast-pr|eview op|
|00004e00| 65 72 61 74 69 6f 6e 2e | 20 20 4f 6e 20 74 68 65 |eration.| On the|
|00004e10| 0a 58 63 6f 6d 70 72 65 | 73 73 69 6f 6e 20 73 69 |.Xcompre|ssion si|
|00004e20| 64 65 20 77 65 20 68 61 | 76 65 20 67 65 6e 65 72 |de we ha|ve gener|
|00004e30| 61 6c 6c 79 20 6e 6f 74 | 20 70 72 6f 76 69 64 65 |ally not| provide|
|00004e40| 64 20 6c 6f 77 2d 71 75 | 61 6c 69 74 79 20 63 68 |d low-qu|ality ch|
|00004e50| 6f 69 63 65 73 2c 20 73 | 69 6e 63 65 0a 58 63 6f |oices, s|ince.Xco|
|00004e60| 6d 70 72 65 73 73 69 6f | 6e 20 69 73 20 6e 6f 72 |mpressio|n is nor|
|00004e70| 6d 61 6c 6c 79 20 6c 65 | 73 73 20 74 69 6d 65 2d |mally le|ss time-|
|00004e80| 63 72 69 74 69 63 61 6c | 2e 20 20 49 74 20 73 68 |critical|. It sh|
|00004e90| 6f 75 6c 64 20 62 65 20 | 75 6e 64 65 72 73 74 6f |ould be |understo|
|00004ea0| 6f 64 20 74 68 61 74 20 | 74 68 65 0a 58 6c 6f 77 |od that |the.Xlow|
|00004eb0| 2d 71 75 61 6c 69 74 79 | 20 6d 6f 64 65 73 20 6d |-quality| modes m|
|00004ec0| 61 79 20 6e 6f 74 20 6d | 65 65 74 20 74 68 65 20 |ay not m|eet the |
|00004ed0| 4a 50 45 47 20 73 74 61 | 6e 64 61 72 64 27 73 20 |JPEG sta|ndard's |
|00004ee0| 61 63 63 75 72 61 63 79 | 20 72 65 71 75 69 72 65 |accuracy| require|
|00004ef0| 6d 65 6e 74 73 3b 0a 58 | 6e 6f 6e 65 74 68 65 6c |ments;.X|nonethel|
|00004f00| 65 73 73 2c 20 74 68 65 | 79 20 61 72 65 20 75 73 |ess, the|y are us|
|00004f10| 65 66 75 6c 20 66 6f 72 | 20 76 69 65 77 65 72 73 |eful for| viewers|
|00004f20| 2e 0a 58 0a 58 0a 58 2a | 2a 2a 20 50 6f 72 74 61 |..X.X.X*|** Porta|
|00004f30| 62 69 6c 69 74 79 20 69 | 73 73 75 65 73 20 2a 2a |bility i|ssues **|
|00004f40| 2a 0a 58 0a 58 50 6f 72 | 74 61 62 69 6c 69 74 79 |*.X.XPor|tability|
|00004f50| 20 69 73 20 61 6e 20 65 | 73 73 65 6e 74 69 61 6c | is an e|ssential|
|00004f60| 20 72 65 71 75 69 72 65 | 6d 65 6e 74 20 66 6f 72 | require|ment for|
|00004f70| 20 74 68 65 20 6c 69 62 | 72 61 72 79 2e 20 20 54 | the lib|rary. T|
|00004f80| 68 65 20 6b 65 79 20 70 | 6f 72 74 61 62 69 6c 69 |he key p|ortabili|
|00004f90| 74 79 0a 58 69 73 73 75 | 65 73 20 74 68 61 74 20 |ty.Xissu|es that |
|00004fa0| 73 68 6f 77 20 75 70 20 | 61 74 20 74 68 65 20 6c |show up |at the l|
|00004fb0| 65 76 65 6c 20 6f 66 20 | 73 79 73 74 65 6d 20 61 |evel of |system a|
|00004fc0| 72 63 68 69 74 65 63 74 | 75 72 65 20 61 72 65 3a |rchitect|ure are:|
|00004fd0| 0a 58 0a 58 31 2e 20 20 | 4d 65 6d 6f 72 79 20 75 |.X.X1. |Memory u|
|00004fe0| 73 61 67 65 2e 20 20 57 | 65 20 77 61 6e 74 20 74 |sage. W|e want t|
|00004ff0| 68 65 20 63 6f 64 65 20 | 74 6f 20 62 65 20 61 62 |he code |to be ab|
|00005000| 6c 65 20 74 6f 20 72 75 | 6e 20 6f 6e 20 50 43 2d |le to ru|n on PC-|
|00005010| 63 6c 61 73 73 20 6d 61 | 63 68 69 6e 65 73 0a 58 |class ma|chines.X|
|00005020| 77 69 74 68 20 6c 69 6d | 69 74 65 64 20 6d 65 6d |with lim|ited mem|
|00005030| 6f 72 79 2e 20 20 49 6d | 61 67 65 73 20 73 68 6f |ory. Im|ages sho|
|00005040| 75 6c 64 20 74 68 65 72 | 65 66 6f 72 65 20 62 65 |uld ther|efore be|
|00005050| 20 70 72 6f 63 65 73 73 | 65 64 20 73 65 71 75 65 | process|ed seque|
|00005060| 6e 74 69 61 6c 6c 79 20 | 28 69 6e 0a 58 73 74 72 |ntially |(in.Xstr|
|00005070| 69 70 73 29 2c 20 74 6f | 20 61 76 6f 69 64 20 68 |ips), to| avoid h|
|00005080| 6f 6c 64 69 6e 67 20 74 | 68 65 20 77 68 6f 6c 65 |olding t|he whole|
|00005090| 20 69 6d 61 67 65 20 69 | 6e 20 6d 65 6d 6f 72 79 | image i|n memory|
|000050a0| 20 61 74 20 6f 6e 63 65 | 2e 20 20 57 68 65 72 65 | at once|. Where|
|000050b0| 20 61 0a 58 66 75 6c 6c | 2d 69 6d 61 67 65 20 62 | a.Xfull|-image b|
|000050c0| 75 66 66 65 72 20 69 73 | 20 6e 65 63 65 73 73 61 |uffer is| necessa|
|000050d0| 72 79 2c 20 77 65 20 73 | 68 6f 75 6c 64 20 62 65 |ry, we s|hould be|
|000050e0| 20 61 62 6c 65 20 74 6f | 20 75 73 65 20 65 69 74 | able to| use eit|
|000050f0| 68 65 72 20 76 69 72 74 | 75 61 6c 20 6d 65 6d 6f |her virt|ual memo|
|00005100| 72 79 0a 58 6f 72 20 74 | 65 6d 70 6f 72 61 72 79 |ry.Xor t|emporary|
|00005110| 20 66 69 6c 65 73 2e 0a | 58 0a 58 32 2e 20 20 4e | files..|X.X2. N|
|00005120| 65 61 72 2f 66 61 72 20 | 70 6f 69 6e 74 65 72 20 |ear/far |pointer |
|00005130| 64 69 73 74 69 6e 63 74 | 69 6f 6e 2e 20 20 54 6f |distinct|ion. To|
|00005140| 20 72 75 6e 20 65 66 66 | 69 63 69 65 6e 74 6c 79 | run eff|iciently|
|00005150| 20 6f 6e 20 38 30 78 38 | 36 20 6d 61 63 68 69 6e | on 80x8|6 machin|
|00005160| 65 73 2c 20 74 68 65 0a | 58 63 6f 64 65 20 73 68 |es, the.|Xcode sh|
|00005170| 6f 75 6c 64 20 64 69 73 | 74 69 6e 67 75 69 73 68 |ould dis|tinguish|
|00005180| 20 22 73 6d 61 6c 6c 22 | 20 6f 62 6a 65 63 74 73 | "small"| objects|
|00005190| 20 28 6b 65 70 74 20 69 | 6e 20 6e 65 61 72 20 64 | (kept i|n near d|
|000051a0| 61 74 61 20 73 70 61 63 | 65 29 20 66 72 6f 6d 0a |ata spac|e) from.|
|000051b0| 58 22 6c 61 72 67 65 22 | 20 6f 6e 65 73 20 28 6b |X"large"| ones (k|
|000051c0| 65 70 74 20 69 6e 20 66 | 61 72 20 64 61 74 61 20 |ept in f|ar data |
|000051d0| 73 70 61 63 65 29 2e 20 | 20 54 68 69 73 20 69 73 |space). | This is|
|000051e0| 20 61 6e 20 61 6e 6e 6f | 79 69 6e 67 20 72 65 73 | an anno|ying res|
|000051f0| 74 72 69 63 74 69 6f 6e | 2c 20 62 75 74 0a 58 66 |triction|, but.Xf|
|00005200| 6f 72 74 75 6e 61 74 65 | 6c 79 20 69 74 20 64 6f |ortunate|ly it do|
|00005210| 65 73 20 6e 6f 74 20 69 | 6d 70 61 63 74 20 63 6f |es not i|mpact co|
|00005220| 64 65 20 71 75 61 6c 69 | 74 79 20 66 6f 72 20 6c |de quali|ty for l|
|00005230| 65 73 73 20 62 72 61 69 | 6e 2d 64 61 6d 61 67 65 |ess brai|n-damage|
|00005240| 64 20 6d 61 63 68 69 6e | 65 73 2c 0a 58 61 6e 64 |d machin|es,.Xand|
|00005250| 20 74 68 65 20 73 6f 75 | 72 63 65 20 63 6f 64 65 | the sou|rce code|
|00005260| 20 63 6c 75 74 74 65 72 | 20 74 75 72 6e 73 20 6f | clutter| turns o|
|00005270| 75 74 20 74 6f 20 62 65 | 20 6d 69 6e 69 6d 61 6c |ut to be| minimal|
|00005280| 20 77 69 74 68 20 73 75 | 66 66 69 63 69 65 6e 74 | with su|fficient|
|00005290| 20 75 73 65 20 6f 66 0a | 58 70 6f 69 6e 74 65 72 | use of.|Xpointer|
|000052a0| 20 74 79 70 65 64 65 66 | 73 2e 0a 58 0a 58 33 2e | typedef|s..X.X3.|
|000052b0| 20 44 61 74 61 20 70 72 | 65 63 69 73 69 6f 6e 2e | Data pr|ecision.|
|000052c0| 20 20 57 65 20 61 73 73 | 75 6d 65 20 74 68 61 74 | We ass|ume that|
|000052d0| 20 22 63 68 61 72 22 20 | 69 73 20 61 74 20 6c 65 | "char" |is at le|
|000052e0| 61 73 74 20 38 20 62 69 | 74 73 2c 20 22 73 68 6f |ast 8 bi|ts, "sho|
|000052f0| 72 74 22 20 61 6e 64 0a | 58 22 69 6e 74 22 20 61 |rt" and.|X"int" a|
|00005300| 74 20 6c 65 61 73 74 20 | 31 36 2c 20 22 6c 6f 6e |t least |16, "lon|
|00005310| 67 22 20 61 74 20 6c 65 | 61 73 74 20 33 32 2e 20 |g" at le|ast 32. |
|00005320| 20 54 68 65 20 63 6f 64 | 65 20 77 69 6c 6c 20 77 | The cod|e will w|
|00005330| 6f 72 6b 20 66 69 6e 65 | 20 77 69 74 68 20 6c 61 |ork fine| with la|
|00005340| 72 67 65 72 0a 58 64 61 | 74 61 20 73 69 7a 65 73 |rger.Xda|ta sizes|
|00005350| 2c 20 61 6c 74 68 6f 75 | 67 68 20 6d 65 6d 6f 72 |, althou|gh memor|
|00005360| 79 20 6d 61 79 20 62 65 | 20 75 73 65 64 20 69 6e |y may be| used in|
|00005370| 65 66 66 69 63 69 65 6e | 74 6c 79 20 69 6e 20 73 |efficien|tly in s|
|00005380| 6f 6d 65 20 63 61 73 65 | 73 2e 20 20 48 6f 77 65 |ome case|s. Howe|
|00005390| 76 65 72 2c 0a 58 74 68 | 65 20 4a 50 45 47 20 63 |ver,.Xth|e JPEG c|
|000053a0| 6f 6d 70 72 65 73 73 65 | 64 20 64 61 74 61 73 74 |ompresse|d datast|
|000053b0| 72 65 61 6d 20 6d 75 73 | 74 20 75 6c 74 69 6d 61 |ream mus|t ultima|
|000053c0| 74 65 6c 79 20 61 70 70 | 65 61 72 20 6f 6e 20 65 |tely app|ear on e|
|000053d0| 78 74 65 72 6e 61 6c 20 | 73 74 6f 72 61 67 65 20 |xternal |storage |
|000053e0| 61 73 20 61 0a 58 73 65 | 71 75 65 6e 63 65 20 6f |as a.Xse|quence o|
|000053f0| 66 20 38 2d 62 69 74 20 | 62 79 74 65 73 20 69 66 |f 8-bit |bytes if|
|00005400| 20 69 74 20 69 73 20 74 | 6f 20 63 6f 6e 66 6f 72 | it is t|o confor|
|00005410| 6d 20 74 6f 20 74 68 65 | 20 73 74 61 6e 64 61 72 |m to the| standar|
|00005420| 64 2e 20 20 54 68 69 73 | 20 6d 61 79 20 70 6f 73 |d. This| may pos|
|00005430| 65 20 61 0a 58 70 72 6f | 62 6c 65 6d 20 6f 6e 20 |e a.Xpro|blem on |
|00005440| 6d 61 63 68 69 6e 65 73 | 20 77 68 65 72 65 20 63 |machines| where c|
|00005450| 68 61 72 20 69 73 20 77 | 69 64 65 72 20 74 68 61 |har is w|ider tha|
|00005460| 6e 20 38 20 62 69 74 73 | 2e 20 20 54 68 65 20 6c |n 8 bits|. The l|
|00005470| 69 62 72 61 72 79 20 72 | 65 70 72 65 73 65 6e 74 |ibrary r|epresent|
|00005480| 73 0a 58 63 6f 6d 70 72 | 65 73 73 65 64 20 64 61 |s.Xcompr|essed da|
|00005490| 74 61 20 61 73 20 61 6e | 20 61 72 72 61 79 20 6f |ta as an| array o|
|000054a0| 66 20 76 61 6c 75 65 73 | 20 6f 66 20 74 79 70 65 |f values| of type|
|000054b0| 64 65 66 20 4a 4f 43 54 | 45 54 2e 20 20 49 66 20 |def JOCT|ET. If |
|000054c0| 6e 6f 20 64 61 74 61 20 | 74 79 70 65 0a 58 65 78 |no data |type.Xex|
|000054d0| 61 63 74 6c 79 20 38 20 | 62 69 74 73 20 77 69 64 |actly 8 |bits wid|
|000054e0| 65 20 69 73 20 61 76 61 | 69 6c 61 62 6c 65 2c 20 |e is ava|ilable, |
|000054f0| 63 75 73 74 6f 6d 20 64 | 61 74 61 20 73 6f 75 72 |custom d|ata sour|
|00005500| 63 65 20 61 6e 64 20 64 | 61 74 61 20 64 65 73 74 |ce and d|ata dest|
|00005510| 69 6e 61 74 69 6f 6e 0a | 58 6d 6f 64 75 6c 65 73 |ination.|Xmodules|
|00005520| 20 6d 75 73 74 20 62 65 | 20 77 72 69 74 74 65 6e | must be| written|
|00005530| 20 74 6f 20 75 6e 70 61 | 63 6b 20 61 6e 64 20 70 | to unpa|ck and p|
|00005540| 61 63 6b 20 74 68 65 20 | 63 68 6f 73 65 6e 20 4a |ack the |chosen J|
|00005550| 4f 43 54 45 54 20 64 61 | 74 61 74 79 70 65 20 69 |OCTET da|tatype i|
|00005560| 6e 74 6f 0a 58 38 2d 62 | 69 74 20 65 78 74 65 72 |nto.X8-b|it exter|
|00005570| 6e 61 6c 20 72 65 70 72 | 65 73 65 6e 74 61 74 69 |nal repr|esentati|
|00005580| 6f 6e 2e 0a 58 0a 58 0a | 58 2a 2a 2a 20 53 79 73 |on..X.X.|X*** Sys|
|00005590| 74 65 6d 20 6f 76 65 72 | 76 69 65 77 20 2a 2a 2a |tem over|view ***|
|000055a0| 0a 58 0a 58 54 68 65 20 | 63 6f 6d 70 72 65 73 73 |.X.XThe |compress|
|000055b0| 6f 72 20 61 6e 64 20 64 | 65 63 6f 6d 70 72 65 73 |or and d|ecompres|
|000055c0| 73 6f 72 20 61 72 65 20 | 65 61 63 68 20 64 69 76 |sor are |each div|
|000055d0| 69 64 65 64 20 69 6e 74 | 6f 20 74 77 6f 20 6d 61 |ided int|o two ma|
|000055e0| 69 6e 20 73 65 63 74 69 | 6f 6e 73 3a 0a 58 74 68 |in secti|ons:.Xth|
|000055f0| 65 20 4a 50 45 47 20 63 | 6f 6d 70 72 65 73 73 6f |e JPEG c|ompresso|
|00005600| 72 20 6f 72 20 64 65 63 | 6f 6d 70 72 65 73 73 6f |r or dec|ompresso|
|00005610| 72 20 70 72 6f 70 65 72 | 2c 20 61 6e 64 20 74 68 |r proper|, and th|
|00005620| 65 20 70 72 65 70 72 6f | 63 65 73 73 69 6e 67 20 |e prepro|cessing |
|00005630| 6f 72 0a 58 70 6f 73 74 | 70 72 6f 63 65 73 73 69 |or.Xpost|processi|
|00005640| 6e 67 20 66 75 6e 63 74 | 69 6f 6e 73 2e 20 20 54 |ng funct|ions. T|
|00005650| 68 65 20 69 6e 74 65 72 | 66 61 63 65 20 62 65 74 |he inter|face bet|
|00005660| 77 65 65 6e 20 74 68 65 | 73 65 20 74 77 6f 20 73 |ween the|se two s|
|00005670| 65 63 74 69 6f 6e 73 20 | 69 73 20 74 68 65 0a 58 |ections |is the.X|
|00005680| 69 6d 61 67 65 20 64 61 | 74 61 20 74 68 61 74 20 |image da|ta that |
|00005690| 74 68 65 20 6f 66 66 69 | 63 69 61 6c 20 4a 50 45 |the offi|cial JPE|
|000056a0| 47 20 73 70 65 63 20 72 | 65 67 61 72 64 73 20 61 |G spec r|egards a|
|000056b0| 73 20 69 74 73 20 69 6e | 70 75 74 20 6f 72 20 6f |s its in|put or o|
|000056c0| 75 74 70 75 74 3a 20 74 | 68 69 73 0a 58 64 61 74 |utput: t|his.Xdat|
|000056d0| 61 20 69 73 20 69 6e 20 | 74 68 65 20 63 6f 6c 6f |a is in |the colo|
|000056e0| 72 73 70 61 63 65 20 74 | 6f 20 62 65 20 75 73 65 |rspace t|o be use|
|000056f0| 64 20 66 6f 72 20 63 6f | 6d 70 72 65 73 73 69 6f |d for co|mpressio|
|00005700| 6e 2c 20 61 6e 64 20 69 | 74 20 69 73 20 64 6f 77 |n, and i|t is dow|
|00005710| 6e 73 61 6d 70 6c 65 64 | 0a 58 74 6f 20 74 68 65 |nsampled|.Xto the|
|00005720| 20 73 61 6d 70 6c 69 6e | 67 20 66 61 63 74 6f 72 | samplin|g factor|
|00005730| 73 20 74 6f 20 62 65 20 | 75 73 65 64 2e 20 20 54 |s to be |used. T|
|00005740| 68 65 20 70 72 65 70 72 | 6f 63 65 73 73 69 6e 67 |he prepr|ocessing|
|00005750| 20 61 6e 64 20 70 6f 73 | 74 70 72 6f 63 65 73 73 | and pos|tprocess|
|00005760| 69 6e 67 0a 58 73 74 65 | 70 73 20 61 72 65 20 72 |ing.Xste|ps are r|
|00005770| 65 73 70 6f 6e 73 69 62 | 6c 65 20 66 6f 72 20 63 |esponsib|le for c|
|00005780| 6f 6e 76 65 72 74 69 6e | 67 20 61 20 6e 6f 72 6d |onvertin|g a norm|
|00005790| 61 6c 20 69 6d 61 67 65 | 20 72 65 70 72 65 73 65 |al image| represe|
|000057a0| 6e 74 61 74 69 6f 6e 20 | 74 6f 20 6f 72 20 66 72 |ntation |to or fr|
|000057b0| 6f 6d 0a 58 74 68 69 73 | 20 66 6f 72 6d 2e 20 20 |om.Xthis| form. |
|000057c0| 28 54 68 6f 73 65 20 66 | 65 77 20 61 70 70 6c 69 |(Those f|ew appli|
|000057d0| 63 61 74 69 6f 6e 73 20 | 74 68 61 74 20 77 61 6e |cations |that wan|
|000057e0| 74 20 74 6f 20 64 65 61 | 6c 20 77 69 74 68 20 59 |t to dea|l with Y|
|000057f0| 43 62 43 72 20 64 6f 77 | 6e 73 61 6d 70 6c 65 64 |CbCr dow|nsampled|
|00005800| 0a 58 64 61 74 61 20 63 | 61 6e 20 73 6b 69 70 20 |.Xdata c|an skip |
|00005810| 74 68 65 20 70 72 65 70 | 72 6f 63 65 73 73 69 6e |the prep|rocessin|
|00005820| 67 20 6f 72 20 70 6f 73 | 74 70 72 6f 63 65 73 73 |g or pos|tprocess|
|00005830| 69 6e 67 20 73 74 65 70 | 2e 29 0a 58 0a 58 4c 6f |ing step|.).X.XLo|
|00005840| 6f 6b 69 6e 67 20 6d 6f | 72 65 20 63 6c 6f 73 65 |oking mo|re close|
|00005850| 6c 79 2c 20 74 68 65 20 | 63 6f 6d 70 72 65 73 73 |ly, the |compress|
|00005860| 6f 72 20 6c 69 62 72 61 | 72 79 20 63 6f 6e 74 61 |or libra|ry conta|
|00005870| 69 6e 73 20 74 68 65 20 | 66 6f 6c 6c 6f 77 69 6e |ins the |followin|
|00005880| 67 20 6d 61 69 6e 0a 58 | 65 6c 65 6d 65 6e 74 73 |g main.X|elements|
|00005890| 3a 0a 58 0a 58 20 20 50 | 72 65 70 72 6f 63 65 73 |:.X.X P|reproces|
|000058a0| 73 69 6e 67 3a 0a 58 20 | 20 20 20 2a 20 43 6f 6c |sing:.X | * Col|
|000058b0| 6f 72 20 73 70 61 63 65 | 20 63 6f 6e 76 65 72 73 |or space| convers|
|000058c0| 69 6f 6e 20 28 65 2e 67 | 2e 2c 20 52 47 42 20 74 |ion (e.g|., RGB t|
|000058d0| 6f 20 59 43 62 43 72 29 | 2e 20 20 54 68 69 73 20 |o YCbCr)|. This |
|000058e0| 73 74 65 70 20 6d 61 79 | 20 61 6c 73 6f 0a 58 20 |step may| also.X |
|000058f0| 20 20 20 20 20 70 72 6f | 76 69 64 65 20 67 61 6d | pro|vide gam|
|00005900| 6d 61 20 61 64 6a 75 73 | 74 6d 65 6e 74 2e 0a 58 |ma adjus|tment..X|
|00005910| 20 20 20 20 2a 20 45 64 | 67 65 20 65 78 70 61 6e | * Ed|ge expan|
|00005920| 73 69 6f 6e 20 61 6e 64 | 20 64 6f 77 6e 73 61 6d |sion and| downsam|
|00005930| 70 6c 69 6e 67 2e 20 20 | 4f 70 74 69 6f 6e 61 6c |pling. |Optional|
|00005940| 6c 79 2c 20 74 68 69 73 | 20 73 74 65 70 20 63 61 |ly, this| step ca|
|00005950| 6e 20 64 6f 20 73 69 6d | 70 6c 65 0a 58 20 20 20 |n do sim|ple.X |
|00005960| 20 20 20 73 6d 6f 6f 74 | 68 69 6e 67 20 2d 2d 2d | smoot|hing ---|
|00005970| 20 74 68 69 73 20 69 73 | 20 6f 66 74 65 6e 20 68 | this is| often h|
|00005980| 65 6c 70 66 75 6c 20 66 | 6f 72 20 6c 6f 77 2d 71 |elpful f|or low-q|
|00005990| 75 61 6c 69 74 79 20 73 | 6f 75 72 63 65 20 64 61 |uality s|ource da|
|000059a0| 74 61 2e 0a 58 20 20 4a | 50 45 47 20 70 72 6f 70 |ta..X J|PEG prop|
|000059b0| 65 72 3a 0a 58 20 20 20 | 20 2a 20 4d 43 55 20 61 |er:.X | * MCU a|
|000059c0| 73 73 65 6d 62 6c 79 2c | 20 44 43 54 2c 20 71 75 |ssembly,| DCT, qu|
|000059d0| 61 6e 74 69 7a 61 74 69 | 6f 6e 2e 0a 58 20 20 20 |antizati|on..X |
|000059e0| 20 2a 20 45 6e 74 72 6f | 70 79 20 63 6f 64 69 6e | * Entro|py codin|
|000059f0| 67 20 28 48 75 66 66 6d | 61 6e 20 6f 72 20 61 72 |g (Huffm|an or ar|
|00005a00| 69 74 68 6d 65 74 69 63 | 29 2e 0a 58 0a 58 49 6e |ithmetic|)..X.XIn|
|00005a10| 20 61 64 64 69 74 69 6f | 6e 20 74 6f 20 74 68 65 | additio|n to the|
|00005a20| 73 65 20 6d 6f 64 75 6c | 65 73 20 77 65 20 6e 65 |se modul|es we ne|
|00005a30| 65 64 20 6f 76 65 72 61 | 6c 6c 20 63 6f 6e 74 72 |ed overa|ll contr|
|00005a40| 6f 6c 2c 20 6d 61 72 6b | 65 72 20 67 65 6e 65 72 |ol, mark|er gener|
|00005a50| 61 74 69 6f 6e 2c 0a 58 | 61 6e 64 20 73 75 70 70 |ation,.X|and supp|
|00005a60| 6f 72 74 20 63 6f 64 65 | 20 28 6d 65 6d 6f 72 79 |ort code| (memory|
|00005a70| 20 6d 61 6e 61 67 65 6d | 65 6e 74 20 26 20 65 72 | managem|ent & er|
|00005a80| 72 6f 72 20 68 61 6e 64 | 6c 69 6e 67 29 2e 20 20 |ror hand|ling). |
|00005a90| 54 68 65 72 65 20 69 73 | 20 61 6c 73 6f 20 61 0a |There is| also a.|
|00005aa0| 58 6d 6f 64 75 6c 65 20 | 72 65 73 70 6f 6e 73 69 |Xmodule |responsi|
|00005ab0| 62 6c 65 20 66 6f 72 20 | 70 68 79 73 69 63 61 6c |ble for |physical|
|00005ac0| 6c 79 20 77 72 69 74 69 | 6e 67 20 74 68 65 20 6f |ly writi|ng the o|
|00005ad0| 75 74 70 75 74 20 64 61 | 74 61 20 2d 2d 2d 20 74 |utput da|ta --- t|
|00005ae0| 79 70 69 63 61 6c 6c 79 | 0a 58 74 68 69 73 20 69 |ypically|.Xthis i|
|00005af0| 73 20 6a 75 73 74 20 61 | 6e 20 69 6e 74 65 72 66 |s just a|n interf|
|00005b00| 61 63 65 20 74 6f 20 66 | 77 72 69 74 65 28 29 2c |ace to f|write(),|
|00005b10| 20 62 75 74 20 73 6f 6d | 65 20 61 70 70 6c 69 63 | but som|e applic|
|00005b20| 61 74 69 6f 6e 73 20 6d | 61 79 20 6e 65 65 64 20 |ations m|ay need |
|00005b30| 74 6f 0a 58 64 6f 20 73 | 6f 6d 65 74 68 69 6e 67 |to.Xdo s|omething|
|00005b40| 20 65 6c 73 65 20 77 69 | 74 68 20 74 68 65 20 64 | else wi|th the d|
|00005b50| 61 74 61 2e 0a 58 0a 58 | 54 68 65 20 64 65 63 6f |ata..X.X|The deco|
|00005b60| 6d 70 72 65 73 73 6f 72 | 20 6c 69 62 72 61 72 79 |mpressor| library|
|00005b70| 20 63 6f 6e 74 61 69 6e | 73 20 74 68 65 20 66 6f | contain|s the fo|
|00005b80| 6c 6c 6f 77 69 6e 67 20 | 6d 61 69 6e 20 65 6c 65 |llowing |main ele|
|00005b90| 6d 65 6e 74 73 3a 0a 58 | 0a 58 20 20 4a 50 45 47 |ments:.X|.X JPEG|
|00005ba0| 20 70 72 6f 70 65 72 3a | 0a 58 20 20 20 20 2a 20 | proper:|.X * |
|00005bb0| 45 6e 74 72 6f 70 79 20 | 64 65 63 6f 64 69 6e 67 |Entropy |decoding|
|00005bc0| 20 28 48 75 66 66 6d 61 | 6e 20 6f 72 20 61 72 69 | (Huffma|n or ari|
|00005bd0| 74 68 6d 65 74 69 63 29 | 2e 0a 58 20 20 20 20 2a |thmetic)|..X *|
|00005be0| 20 44 65 71 75 61 6e 74 | 69 7a 61 74 69 6f 6e 2c | Dequant|ization,|
|00005bf0| 20 69 6e 76 65 72 73 65 | 20 44 43 54 2c 20 4d 43 | inverse| DCT, MC|
|00005c00| 55 20 64 69 73 61 73 73 | 65 6d 62 6c 79 2e 0a 58 |U disass|embly..X|
|00005c10| 20 20 50 6f 73 74 70 72 | 6f 63 65 73 73 69 6e 67 | Postpr|ocessing|
|00005c20| 3a 0a 58 20 20 20 20 2a | 20 55 70 73 61 6d 70 6c |:.X *| Upsampl|
|00005c30| 69 6e 67 2e 20 20 4f 70 | 74 69 6f 6e 61 6c 6c 79 |ing. Op|tionally|
|00005c40| 2c 20 74 68 69 73 20 73 | 74 65 70 20 6d 61 79 20 |, this s|tep may |
|00005c50| 62 65 20 61 62 6c 65 20 | 74 6f 20 64 6f 20 6d 6f |be able |to do mo|
|00005c60| 72 65 20 67 65 6e 65 72 | 61 6c 0a 58 20 20 20 20 |re gener|al.X |
|00005c70| 20 20 72 65 73 63 61 6c | 69 6e 67 20 6f 66 20 74 | rescal|ing of t|
|00005c80| 68 65 20 69 6d 61 67 65 | 2e 0a 58 20 20 20 20 2a |he image|..X *|
|00005c90| 20 43 6f 6c 6f 72 20 73 | 70 61 63 65 20 63 6f 6e | Color s|pace con|
|00005ca0| 76 65 72 73 69 6f 6e 20 | 28 65 2e 67 2e 2c 20 59 |version |(e.g., Y|
|00005cb0| 43 62 43 72 20 74 6f 20 | 52 47 42 29 2e 20 20 54 |CbCr to |RGB). T|
|00005cc0| 68 69 73 20 73 74 65 70 | 20 6d 61 79 20 61 6c 73 |his step| may als|
|00005cd0| 6f 0a 58 20 20 20 20 20 | 20 70 72 6f 76 69 64 65 |o.X | provide|
|00005ce0| 20 67 61 6d 6d 61 20 61 | 64 6a 75 73 74 6d 65 6e | gamma a|djustmen|
|00005cf0| 74 2e 0a 58 20 20 20 20 | 2a 20 4f 70 74 69 6f 6e |t..X |* Option|
|00005d00| 61 6c 20 63 6f 6c 6f 72 | 20 71 75 61 6e 74 69 7a |al color| quantiz|
|00005d10| 61 74 69 6f 6e 20 28 65 | 2e 67 2e 2c 20 72 65 64 |ation (e|.g., red|
|00005d20| 75 63 74 69 6f 6e 20 74 | 6f 20 32 35 36 20 63 6f |uction t|o 256 co|
|00005d30| 6c 6f 72 73 29 2e 0a 58 | 20 20 20 20 2a 20 4f 70 |lors)..X| * Op|
|00005d40| 74 69 6f 6e 61 6c 20 63 | 6f 6c 6f 72 20 70 72 65 |tional c|olor pre|
|00005d50| 63 69 73 69 6f 6e 20 72 | 65 64 75 63 74 69 6f 6e |cision r|eduction|
|00005d60| 20 28 65 2e 67 2e 2c 20 | 32 34 2d 62 69 74 20 74 | (e.g., |24-bit t|
|00005d70| 6f 20 31 35 2d 62 69 74 | 20 63 6f 6c 6f 72 29 2e |o 15-bit| color).|
|00005d80| 0a 58 20 20 20 20 20 20 | 5b 4e 6f 74 20 69 6d 70 |.X |[Not imp|
|00005d90| 6c 65 6d 65 6e 74 65 64 | 20 69 6e 20 76 35 2e 5d |lemented| in v5.]|
|00005da0| 0a 58 0a 58 57 65 20 61 | 6c 73 6f 20 6e 65 65 64 |.X.XWe a|lso need|
|00005db0| 20 6f 76 65 72 61 6c 6c | 20 63 6f 6e 74 72 6f 6c | overall| control|
|00005dc0| 2c 20 6d 61 72 6b 65 72 | 20 70 61 72 73 69 6e 67 |, marker| parsing|
|00005dd0| 2c 20 61 6e 64 20 61 20 | 64 61 74 61 20 73 6f 75 |, and a |data sou|
|00005de0| 72 63 65 20 6d 6f 64 75 | 6c 65 2e 0a 58 54 68 65 |rce modu|le..XThe|
|00005df0| 20 73 75 70 70 6f 72 74 | 20 63 6f 64 65 20 28 6d | support| code (m|
|00005e00| 65 6d 6f 72 79 20 6d 61 | 6e 61 67 65 6d 65 6e 74 |emory ma|nagement|
|00005e10| 20 26 20 65 72 72 6f 72 | 20 68 61 6e 64 6c 69 6e | & error| handlin|
|00005e20| 67 29 20 63 61 6e 20 62 | 65 20 73 68 61 72 65 64 |g) can b|e shared|
|00005e30| 20 77 69 74 68 0a 58 74 | 68 65 20 63 6f 6d 70 72 | with.Xt|he compr|
|00005e40| 65 73 73 69 6f 6e 20 68 | 61 6c 66 20 6f 66 20 74 |ession h|alf of t|
|00005e50| 68 65 20 6c 69 62 72 61 | 72 79 2e 0a 58 0a 58 54 |he libra|ry..X.XT|
|00005e60| 68 65 72 65 20 6d 61 79 | 20 62 65 20 73 65 76 65 |here may| be seve|
|00005e70| 72 61 6c 20 69 6d 70 6c | 65 6d 65 6e 74 61 74 69 |ral impl|ementati|
|00005e80| 6f 6e 73 20 6f 66 20 65 | 61 63 68 20 6f 66 20 74 |ons of e|ach of t|
|00005e90| 68 65 73 65 20 65 6c 65 | 6d 65 6e 74 73 2c 20 70 |hese ele|ments, p|
|00005ea0| 61 72 74 69 63 75 6c 61 | 72 6c 79 0a 58 69 6e 20 |articula|rly.Xin |
|00005eb0| 74 68 65 20 64 65 63 6f | 6d 70 72 65 73 73 6f 72 |the deco|mpressor|
|00005ec0| 2c 20 77 68 65 72 65 20 | 61 20 77 69 64 65 20 72 |, where |a wide r|
|00005ed0| 61 6e 67 65 20 6f 66 20 | 73 70 65 65 64 2f 71 75 |ange of |speed/qu|
|00005ee0| 61 6c 69 74 79 20 74 72 | 61 64 65 6f 66 66 73 20 |ality tr|adeoffs |
|00005ef0| 69 73 20 76 65 72 79 0a | 58 75 73 65 66 75 6c 2e |is very.|Xuseful.|
|00005f00| 20 20 49 74 20 6d 75 73 | 74 20 62 65 20 75 6e 64 | It mus|t be und|
|00005f10| 65 72 73 74 6f 6f 64 20 | 74 68 61 74 20 73 6f 6d |erstood |that som|
|00005f20| 65 20 6f 66 20 74 68 65 | 20 62 65 73 74 20 73 70 |e of the| best sp|
|00005f30| 65 65 64 75 70 73 20 69 | 6e 76 6f 6c 76 65 0a 58 |eedups i|nvolve.X|
|00005f40| 6d 65 72 67 69 6e 67 20 | 61 64 6a 61 63 65 6e 74 |merging |adjacent|
|00005f50| 20 73 74 65 70 73 20 69 | 6e 20 74 68 65 20 70 69 | steps i|n the pi|
|00005f60| 70 65 6c 69 6e 65 2e 20 | 20 46 6f 72 20 65 78 61 |peline. | For exa|
|00005f70| 6d 70 6c 65 2c 20 75 70 | 73 61 6d 70 6c 69 6e 67 |mple, up|sampling|
|00005f80| 2c 20 63 6f 6c 6f 72 20 | 73 70 61 63 65 0a 58 63 |, color |space.Xc|
|00005f90| 6f 6e 76 65 72 73 69 6f | 6e 2c 20 61 6e 64 20 63 |onversio|n, and c|
|00005fa0| 6f 6c 6f 72 20 71 75 61 | 6e 74 69 7a 61 74 69 6f |olor qua|ntizatio|
|00005fb0| 6e 20 6d 69 67 68 74 20 | 61 6c 6c 20 62 65 20 64 |n might |all be d|
|00005fc0| 6f 6e 65 20 61 74 20 6f | 6e 63 65 20 77 68 65 6e |one at o|nce when|
|00005fd0| 20 75 73 69 6e 67 20 61 | 0a 58 6c 6f 77 2d 71 75 | using a|.Xlow-qu|
|00005fe0| 61 6c 69 74 79 20 6f 72 | 64 65 72 65 64 2d 64 69 |ality or|dered-di|
|00005ff0| 74 68 65 72 20 74 65 63 | 68 6e 69 71 75 65 2e 20 |ther tec|hnique. |
|00006000| 20 54 68 65 20 73 79 73 | 74 65 6d 20 61 72 63 68 | The sys|tem arch|
|00006010| 69 74 65 63 74 75 72 65 | 20 69 73 20 64 65 73 69 |itecture| is desi|
|00006020| 67 6e 65 64 20 74 6f 0a | 58 61 6c 6c 6f 77 20 73 |gned to.|Xallow s|
|00006030| 75 63 68 20 6d 65 72 67 | 69 6e 67 20 77 68 65 72 |uch merg|ing wher|
|00006040| 65 20 61 70 70 72 6f 70 | 72 69 61 74 65 2e 0a 58 |e approp|riate..X|
|00006050| 0a 58 0a 58 4e 6f 74 65 | 3a 20 69 74 20 69 73 20 |.X.XNote|: it is |
|00006060| 63 6f 6e 76 65 6e 69 65 | 6e 74 20 74 6f 20 72 65 |convenie|nt to re|
|00006070| 67 61 72 64 20 65 64 67 | 65 20 65 78 70 61 6e 73 |gard edg|e expans|
|00006080| 69 6f 6e 20 28 70 61 64 | 64 69 6e 67 20 74 6f 20 |ion (pad|ding to |
|00006090| 62 6c 6f 63 6b 20 62 6f | 75 6e 64 61 72 69 65 73 |block bo|undaries|
|000060a0| 29 0a 58 61 73 20 61 20 | 70 72 65 70 72 6f 63 65 |).Xas a |preproce|
|000060b0| 73 73 69 6e 67 2f 70 6f | 73 74 70 72 6f 63 65 73 |ssing/po|stproces|
|000060c0| 73 69 6e 67 20 66 75 6e | 63 74 69 6f 6e 2c 20 65 |sing fun|ction, e|
|000060d0| 76 65 6e 20 74 68 6f 75 | 67 68 20 74 68 65 20 4a |ven thou|gh the J|
|000060e0| 50 45 47 20 73 70 65 63 | 20 69 6e 63 6c 75 64 65 |PEG spec| include|
|000060f0| 73 0a 58 69 74 20 69 6e | 20 63 6f 6d 70 72 65 73 |s.Xit in| compres|
|00006100| 73 69 6f 6e 2f 64 65 63 | 6f 6d 70 72 65 73 73 69 |sion/dec|ompressi|
|00006110| 6f 6e 2e 20 20 57 65 20 | 64 6f 20 74 68 69 73 20 |on. We |do this |
|00006120| 62 65 63 61 75 73 65 20 | 64 6f 77 6e 73 61 6d 70 |because |downsamp|
|00006130| 6c 69 6e 67 2f 75 70 73 | 61 6d 70 6c 69 6e 67 0a |ling/ups|ampling.|
|00006140| 58 63 61 6e 20 62 65 20 | 73 69 6d 70 6c 69 66 69 |Xcan be |simplifi|
|00006150| 65 64 20 61 20 6c 69 74 | 74 6c 65 20 69 66 20 74 |ed a lit|tle if t|
|00006160| 68 65 79 20 77 6f 72 6b | 20 6f 6e 20 70 61 64 64 |hey work| on padd|
|00006170| 65 64 20 64 61 74 61 3a | 20 69 74 27 73 20 6e 6f |ed data:| it's no|
|00006180| 74 20 6e 65 63 65 73 73 | 61 72 79 20 74 6f 0a 58 |t necess|ary to.X|
|00006190| 68 61 76 65 20 73 70 65 | 63 69 61 6c 20 63 61 73 |have spe|cial cas|
|000061a0| 65 73 20 61 74 20 74 68 | 65 20 72 69 67 68 74 20 |es at th|e right |
|000061b0| 61 6e 64 20 62 6f 74 74 | 6f 6d 20 65 64 67 65 73 |and bott|om edges|
|000061c0| 2e 20 20 54 68 65 72 65 | 66 6f 72 65 20 74 68 65 |. There|fore the|
|000061d0| 20 69 6e 74 65 72 66 61 | 63 65 0a 58 62 75 66 66 | interfa|ce.Xbuff|
|000061e0| 65 72 20 69 73 20 61 6c | 77 61 79 73 20 61 6e 20 |er is al|ways an |
|000061f0| 69 6e 74 65 67 72 61 6c | 20 6e 75 6d 62 65 72 20 |integral| number |
|00006200| 6f 66 20 62 6c 6f 63 6b | 73 20 77 69 64 65 20 61 |of block|s wide a|
|00006210| 6e 64 20 68 69 67 68 2c | 20 61 6e 64 20 77 65 20 |nd high,| and we |
|00006220| 65 78 70 65 63 74 0a 58 | 63 6f 6d 70 72 65 73 73 |expect.X|compress|
|00006230| 69 6f 6e 20 70 72 65 70 | 72 6f 63 65 73 73 69 6e |ion prep|rocessin|
|00006240| 67 20 74 6f 20 70 61 64 | 20 74 68 65 20 73 6f 75 |g to pad| the sou|
|00006250| 72 63 65 20 64 61 74 61 | 20 70 72 6f 70 65 72 6c |rce data| properl|
|00006260| 79 2e 20 20 50 61 64 64 | 69 6e 67 20 77 69 6c 6c |y. Padd|ing will|
|00006270| 20 6f 63 63 75 72 0a 58 | 6f 6e 6c 79 20 74 6f 20 | occur.X|only to |
|00006280| 74 68 65 20 6e 65 78 74 | 20 62 6c 6f 63 6b 20 28 |the next| block (|
|00006290| 38 2d 73 61 6d 70 6c 65 | 29 20 62 6f 75 6e 64 61 |8-sample|) bounda|
|000062a0| 72 79 2e 20 20 49 6e 20 | 61 6e 20 69 6e 74 65 72 |ry. In |an inter|
|000062b0| 6c 65 61 76 65 64 2d 73 | 63 61 6e 20 73 69 74 75 |leaved-s|can situ|
|000062c0| 61 74 69 6f 6e 2c 0a 58 | 61 64 64 69 74 69 6f 6e |ation,.X|addition|
|000062d0| 61 6c 20 64 75 6d 6d 79 | 20 62 6c 6f 63 6b 73 20 |al dummy| blocks |
|000062e0| 6d 61 79 20 62 65 20 75 | 73 65 64 20 74 6f 20 66 |may be u|sed to f|
|000062f0| 69 6c 6c 20 6f 75 74 20 | 4d 43 55 73 2c 20 62 75 |ill out |MCUs, bu|
|00006300| 74 20 74 68 65 20 4d 43 | 55 20 61 73 73 65 6d 62 |t the MC|U assemb|
|00006310| 6c 79 20 61 6e 64 0a 58 | 64 69 73 61 73 73 65 6d |ly and.X|disassem|
|00006320| 62 6c 79 20 6c 6f 67 69 | 63 20 77 69 6c 6c 20 63 |bly logi|c will c|
|00006330| 72 65 61 74 65 20 6f 72 | 20 64 69 73 63 61 72 64 |reate or| discard|
|00006340| 20 74 68 65 73 65 20 62 | 6c 6f 63 6b 73 20 69 6e | these b|locks in|
|00006350| 74 65 72 6e 61 6c 6c 79 | 2e 20 20 28 54 68 69 73 |ternally|. (This|
|00006360| 20 69 73 0a 58 61 64 76 | 61 6e 74 61 67 65 6f 75 | is.Xadv|antageou|
|00006370| 73 20 66 6f 72 20 73 70 | 65 65 64 20 72 65 61 73 |s for sp|eed reas|
|00006380| 6f 6e 73 2c 20 73 69 6e | 63 65 20 77 65 20 61 76 |ons, sin|ce we av|
|00006390| 6f 69 64 20 44 43 54 69 | 6e 67 20 74 68 65 20 64 |oid DCTi|ng the d|
|000063a0| 75 6d 6d 79 20 62 6c 6f | 63 6b 73 2e 0a 58 49 74 |ummy blo|cks..XIt|
|000063b0| 20 61 6c 73 6f 20 70 65 | 72 6d 69 74 73 20 61 20 | also pe|rmits a |
|000063c0| 73 6d 61 6c 6c 20 72 65 | 64 75 63 74 69 6f 6e 20 |small re|duction |
|000063d0| 69 6e 20 66 69 6c 65 20 | 73 69 7a 65 2c 20 62 65 |in file |size, be|
|000063e0| 63 61 75 73 65 20 74 68 | 65 20 63 6f 6d 70 72 65 |cause th|e compre|
|000063f0| 73 73 6f 72 20 63 61 6e | 0a 58 63 68 6f 6f 73 65 |ssor can|.Xchoose|
+--------+-------------------------+-------------------------+--------+--------+
Only 25.0 KB of data is shown above.
