(?:`)?(?:independent`jpeg`group`license)?(?:`)?(?:`)?(?:legal`issues`in`plain`english:(?:`)?(?:.{,20})(?:`)?we`don`t`promise`that`this`software`works\.`\(but`if`you`find`any`bugs,`please`let`us`know!\)(?:`)?(?:.{,20})(?:`)?you`can`use`this`software`for`whatever`you`want\.`you`don`t`have`to`pay`us\.(?:`)?(?:.{,20})(?:`)?`you`may`not`pretend`that`you`wrote`this`software\.`if`you`use`it`in`a`program,`you`must`acknowledge`somewhere`in`your`documentation`that`you`ve`used`the`ijg`code\.`in`legalese:)?(?:`)?the`authors`make`no`warranty`or`representation,`either`express`or`implied,`with`respect`to`this`software,`its`quality,`accuracy,`merchantability,`or`fitness`for`a`particular`purpose\.`this`software`is`provided`as`is`,`and`you,`its`user,`assume`the`entire`risk`as`to`its`quality`and`accuracy\.`this`software`is`copyright`\(c\)`1991\-1998,`thomas`g\.`lane\.`all`rights`reserved`except`as`specified`below\.`permission`is`hereby`granted`to`use,`copy,`modify,`and`distribute`this`software`\(or`portions`thereof\)`for`any`purpose,`without`fee,`subject`to`these`conditions:(?:`)?(?:.{,20})(?:`)?if`any`part`of`the`source`code`for`this`software`is`distributed,`then`this`readme`file`must`be`included,`with`this`copyright`and`no\-`warranty`notice`unaltered;`and`any`additions,`deletions,`or`changes`to`the`original`files`must`be`clearly`indicated`in`accompanying`documentation\.(?:`)?(?:.{,20})(?:`)?if`only`executable`code`is`distributed,`then`the`accompanying`documentation`must`state`that`this`software`is`based`in`part`on`the`work`of`the`independent`jpeg`group`\.(?:`)?(?:.{,20})(?:`)?`permission`for`use`of`this`software`is`granted`only`if`the`user`accepts`full`responsibility`for`any`undesirable`consequences;`the`authors`accept`no`liability`for`damages`of`any`kind\.`these`conditions`apply`to`any`software`derived`from`or`based`on`the`ijg`code,`not`just`to`the`unmodified`library\.`if`you`use`our`work,`you`ought`to`acknowledge`us\.`permission`is`not`granted`for`the`use`of`any`ijg`author`s`name`or`company`name`in`advertising`or`publicity`relating`to`this`software`or`products`derived`from`it\.`this`software`may`be`referred`to`only`as`the`independent`jpeg`group`s`software`\.`we`specifically`permit`and`encourage`the`use`of`this`software`as`the`basis`of`commercial`products,`provided`that`all`warranty`or`liability`claims`are`assumed`by`the`product`vendor\.`ansi2knr\.`c`is`included`in`this`distribution`by`permission`of`l\.`peter`deutsch,`sole`proprietor`of`its`copyright`holder,`aladdin`enterprises`of`menlo`park,`ca\.`ansi2knr\.`c`is`not`covered`by`the`above`copyright`and`conditions,`but`instead`by`the`usual`distribution`terms`of`the`free`software`foundation;`principally,`that`you`must`include`source`code`if`you`redistribute`it\.`\(see`the`file`ansi2knr\.`c`for`full`details\.\)`however,`since`ansi2knr\.`c`is`not`needed`as`part`of`any`program`generated`from`the`ijg`code,`this`does`not`limit`you`more`than`the`foregoing`paragraphs`do\.`the`unix`configuration`script`configure`was`produced`with`gnu`autoconf\.`it`is`copyright`by`the`free`software`foundation`but`is`freely`distributable\.`the`same`holds`for`its`supporting`scripts`\(config\.`guess,`config\.`sub,`ltconfig,`ltmain\.`sh\)\.`another`support`script,`install\-`sh,`is`copyright`by`m\.`i\.`t\.`but`is`also`freely`distributable\.`it`appears`that`the`arithmetic`coding`option`of`the`jpeg`spec`is`covered`by`patents`owned`by`ibm,`at\&t,`and`mitsubishi\.`hence`arithmetic`coding`cannot`legally`be`used`without`obtaining`one`or`more`licenses\.`for`this`reason,`support`for`arithmetic`coding`has`been`removed`from`the`free`jpeg`software\.`\(since`arithmetic`coding`provides`only`a`marginal`gain`over`the`unpatented`huffman`mode,`it`is`unlikely`that`very`many`implementations`will`support`it\.\)`so`far`as`we`are`aware,`there`are`no`patent`restrictions`on`the`remaining`code\.`the`ijg`distribution`formerly`included`code`to`read`and`write`gif`files\.`to`avoid`entanglement`with`the`unisys`lzw`patent,`gif`reading`support`has`been`removed`altogether,`and`the`gif`writer`has`been`simplified`to`produce`uncompressed`gifs`\.`this`technique`does`not`use`the`lzw`algorithm;`the`resulting`gif`files`are`larger`than`usual,`but`are`readable`by`all`standard`gif`decoders\.`we`are`required`to`state`that`the`graphics`interchange`format\(c\)`is`the`copyright`property`of`compuserve`incorporated\.`gif\(sm\)`is`a`service`mark`property`of`compuserve`incorporated\.