* ChangeLog (oldest first): * * Started by Alexander Lehmann and subsequently * extended by people as listed below. * * AL - Alexander Lehmann * AED - Andreas Dilger * GRP - Glenn Randers-Pehrson * GRR - Greg Roelofs * JB - John Bowler * TGL - Tom Lane * * 19950223 AL: fixed wrong magic numbers * * 19950313 AL: crc code from png spec, compiles on memory impaired PCs now, * check for IHDR/IEND chunks * * 19950325 GRP: rewrote magic-number-checking and moved it to * PNG_check_magic(buffer) * * 19950327 AL: fixed CRC code for 64 bit, -t switch, unsigned char vs. char * pointer changes * * 19960601 AL: check for data after IEND chunk * * 19950601 GRR: reformatted; print tEXt and zTXt keywords; added usage * * 19950731 AL: check for control chars, check for MacBinary header, new * force option * * 19950827 AL: merged Greg's 1.61 changes: print IHDR and tIME contents, * call emx wildcard function * * 19951121 AED: re-ordered internal chunk checking in pngcheck(). * Now decodes most of the known chunk types to check for invalid * contents (except IDAT and zTXt). Information is printed * about the contents of known chunks, and unknown chunks have * their chunk name flags decoded. Also checks chunk ordering. * * 19951126 AED: minor bug fixes and nicening of the output. Checks for * valid cHRM contents per Chris Lilley's recommendation. * * 19951204 AED: minor bug in cHRM error output fixed * * 19960105 AED: added -q flaq to only output a message if an error occurrs * * 19960119 AED: added ability to parse multiple options with a single '-' * changed tIME output to be in RFC 1123 format * * 19960517 GRR: fixed obvious(?) fprintf error; fixed multiple-tIME error msg * * 19960521 AL: fixed two tRNS errors reported by someone from W3C (whose name * I currently don't remember) (complained about missing palette * in greyscale images, missing breaks in case statement) * avoid reference to undefined array entry with out of range ityp * * 19960605 AED: removed extra linefeed from cHRM output when not verbose * added test to see if sBIT contents are valid * added test for zero width or height in IHDR * added test for insufficient IDAT data (minimum 10 bytes) * * 19960605 AED: added -p flag to dump the palette contents * * 19961231 JB: add decoding of the zlib header from the first IDAT chunk (16- * bit header code in first two bytes, see print_zlibheader). * * 19970102 GRR: more sensible zlib-header output (version "1.97grr"); nuked * some tabs; fixed blank lines between files in verbose output * * 19970106 AED: initialize the command-line flags * add macros to ensure the error level doesn't go down * return error level to calling program * consolidate PNG magic on one place * add "-" as input file for stdin * check for valid tEXt/zTXt keywords per PNG Spec 1.0 * slight modification to output of tEXt/zTXt keywords/contents * change 'extract' to only output valid chunks (unless forced) * this may allow one to fix minor errors in a PNG file * * 19970107 GRR: added USE_ZLIB compile option to print line filters (with -vv) * 19970110 GRR: fixed line-filters code for large-IDAT case * 19970621 GRR: added compression-ratio info * 19980609 TGL: fixed pHYs buglet * 19980609 GRR: re-integrated minimal MNG support from 97.01.21 branch * 19980610 GRR: extended MNG (MHDR info, DHDR, nEED, DEFI, FRAM, MEND) * 19980611 GRR: extended MNG (more FRAM info; LOOP, ENDL) * 19980612 GRR: extended MNG (FRAM, BACK, MOVE, CLON, SHOW, CLIP, fPRI, eXPI) * 19980616 GRR: extended MNG (PROM, SAVE, SEEK) * 19980702 GRR: fixed line-filters bug reported by Theodore Goodman (97.10.19); * updated SAVE for MNG Draft 43 * 19980711 GRR: added sPLT; extended printpal (-p) to support tRNS, hIST, sPLT * 19981021 GRR: added Win32 fix and compilation info; fixed mng=0, DEFI and * printpal bugs * 19981206 GRR: added "File: %s" for printpal; fixed some plural%s; fixed and * extended unknown-chunk info (separate line now); added dpi info * to pHYs and flagged unit types > 1 as error * 19981228 GRR: nuked old comments; added proto-copyright message * 19990201 GRR: changed control-character warning to "one or more" * 19990327 GRR: added option to indent printtext; changed non-verbose summary * to two lines; added tRNS info to summary * 19990613 GRR: fixed remaining "must precede IDAT" messages for MNG; updated * MHDR and LOOP for Draft 64 * 19990619 GRR: released version 1.99-grr1 * 19990620 GRR: fixed Glenn's e-mail address and help-screen MNG-draft version; * disabled compression ratio for MNG; updated FRAM for Draft 64; * fixed "not enough IDAT data" IEND bug; renamed * PNG_MNG_check_magic() to check_magic(); renamed * PNG_check_chunk_name() to check_chunk_name(); * 19990713 GRP: fixed MNG global-PLTE case (zero-length allowed) * 19990718 GRR: shortened non-verbose summary so fits on one line again; added * BASI and PPLT * 19991114 GRR: added gIFg, gIFx and part of gIFt * 19991117 GRR: finished gIFt; added sRGB and iCCP * 19991117 GRR: released version 1.99.2