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CHANGELOG
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* ChangeLog (oldest first):
*
* Started by Alexander Lehmann <[email protected]> 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
* ["version 1.1"]
* ---------------
* 19950313 AL: CRC code from PNG spec; compiles on memory-impaired PCs now;
* check for IHDR/IEND chunks
* ["version 1.2"]
* ---------------
* 19950325 GRP: rewrote magic-number-checking and moved it to PNG_check_magic()
* ["version 1.3"]
* ---------------
* 19950327 AL: fixed CRC code for 64-bit; -t switch; unsigned char vs. char
* pointer changes
* ["version 1.4"]
* ---------------
* 19960601 AL: check for data after IEND chunk
* ["version 1.5"]
* ---------------
* 19950601 GRR: reformatted; print tEXt and zTXt keywords; added usage
* 19950601 GRR: released version 1.6, a.k.a. pngcheck-grr1.c
* --------------------------------------------
* 19950607 GRR: print image info (IHDR) and tIME; enable EMX wildcards
* 19950615 GRR: released version 1.61, a.k.a. pngcheck-grr2.c
* ---------------------------------------------
* 19950731 AL: check for control chars; check for MacBinary header; new
* force option
* 19950731 AL: released version 1.7
* --------------------
* 19950827 AL: merged Greg's 1.61 changes: print IHDR and tIME contents,
* call emx wildcard function
* 19950827 AL: released version 1.8
* --------------------
* 19950904 GRR: added brackets on keyword error messages to distinguish from
* keyword text
* 19950904 GRR: released version 1.81
* ---------------------
* 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.
* 19951121 AED: released version 1.9
* --------------------
* 19951126 AED: minor bug fixes and nicening of the output. Checks for
* valid cHRM contents per Chris Lilley's recommendation.
* 19951126 AED: released version 1.91
* ---------------------
* 19951204 AED: minor bug in cHRM error output fixed
* 19960105 AED: added -q flaq to output a message only if an error occurs
* 19960105 AED: released version 1.92
* ---------------------
* 19960119 AED: added ability to parse multiple options with a single '-';
* changed tIME output to be in RFC 1123 format
* 19960306 AED: released version 1.93
* ---------------------
* 19960517 GRR: fixed obvious(?) fprintf error; fixed multiple-tIME error msg
* 19960517 GRR: released version 1.94
* ---------------------
* 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
* 19960521 AL: released version 1.95
* ---------------------
* 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: released version 1.96
* ---------------------
* 19960605 AED: added -p flag to dump the palette contents (decimal and hex);
* cleaned up internals
* 19960927 AED: released version 1.97
* ---------------------
* 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 output only valid chunks (unless
* forced)--this may allow one to fix minor errors in a PNG file
* 19970107 AED: released version 1.98
* ---------------------
* 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
* -----------------------
* 19991122 GRR: fixed typo in gIFx application ID format (%.*s)
* 19991215 GRR: added notes about wildcard expansion under Windows
* 20000304 GRR: fixed indentation on -vt printing of zTXt chunk; fixed bogus
* double-backslash bug in printtext(); added -vvvv data-dump
* capability (very crude, not correct, ... needs much work)
* 20000902 GRR: added JNG support; JHDR, JDAT, JSEP; fRAc, iTXt, pCAL, mkBF,
* mkBS, mkBT, prVW
* 20000902 GRR: released version 1.99.3
* -----------------------
* 20000904 GRR: updated usage screen to include JNG; changed dtime to double
* to quiet an MSVC conversion warning
* 20000905 GRR: quieted several IRIX gcc warnings
* 20000927 GRR: fixed formatting error when both -v and -p options given;
* incorporated Tom Zerucha <[email protected]>'s patch to use zlib
* CRC routines if USE_ZLIB defined
* 20001127 GRR: fixed MNG "incorrect [tRNS] length for grayscale image" bug
* 20010104 GRR: added support for profile bits 6-9, with minimal checking of
* 10-15 and 16-30
* 20010116 GRR: incorported Glenn's USE_ZLIB interlacing bugfix of 20000727
* 20010127 GRR: enhanced summary lines for PNG/MNG/JNG; fixed MNG "sBIT must
* precede PLTE" bug
* 20011209 GRR: started adding PAST support (incomplete!); further work on
* summary lines and error-detection?
* 20020922 GRR: fixed verbose missing newlines for SEEK and empty SAVE chunks
* 20040120 GRR: fixed missing error level for zlib_error (thanks to Gerrit
* Hannaert for the bug report) and for "not enough IDAT data"
* (thanks to Eduardo Morras for the test file)
* 20050712 GRR: updated/fixed SAVE support according to final MNG spec
* 20050716 GRR: updated/fixed BACK support according to final MNG spec; added
* TERM support; added summary of errors if multiple files;
* incorporated Paul Matzke's Mac fixes; incorporated Darren
* Salt's RISC OS fixes; fixed bad-PNG-signature bug; fixed bKGD
* index-out-of-range bug; fixed typos ("pHYS", IDAT vs. JDAT);
* cleaned up code and output formatting
* 20050717 GRR: enabled zlib checking independent of verbosity level; added
* more stringent zlib windowBits test (from John Bowler) to
* check for libpng 1.2.6 bug; added -w option to disable
* windowBits test; fixed faulty zlib "error" detection
* 20050717 GRR: released version 2.0.0
* ----------------------
* 20050723 GRR: added checks for duplicate SAVE and SEEK without SAVE;
* finished PAST and added DISC support
* 20050724 GRR: updated pHYs with aspect ratio; added pHYg, DROP, DBYK, ORDR,
* and MAGN support; added check_keyword() function; fixed zlib-
* initialization bug in MNG delta-PNGs
* 20050725 GRR: added error-checks for unknown public chunks and chunks with
* reserved bit set
* 20050727 GRR: fixed -f bug (failure to read CRC bytes)
* 20050801 GRR: added png-fix-IDAT-windowsize utility (GNU GPL)
* 20050814 GRR: added pngsplit utility (GNU GPL) -- still beta!
* 20060617 GRR: added checks for too-big chunk length, missing PLTE in type-3
* (palette) image, missing IDAT in PNG image, missing JDAT in
* JNG image, and private/critical chunks (warning only) (thanks
* to Chris Nokleberg for "brokensuite" test files); added
* CRITICAL, RESERVED, etc., macros; changed slightly confusing
* CRC error message ("actual/should be" -> "computed/expected");
* added sTER support
* 20060617 GRR: released version 2.1.0
* ----------------------
* 20061202 GRR: always print a per-file summary (even if error(s))
* 20061203 GRR: added tests for all but two of the error conditions present
* in Chris Nokleberg's brokensuite-20061201; added new warning
* level (treat as OK if private test, error if public); started
* reducing dependence on global variables; added final totals
* for errors, warnings, and "OK" files; switched to logical
* names for error levels; fixed some inconsistent error levels;
* started removing unsafe ASCII assumptions; added checks for
* (private) cmOD, cpIp chunks; filled in old (missing) version
* info in CHANGELOG
* 20061203 GRR: released version 2.2.0
* ----------------------
* 20070211 GRR: extended pngsplit file-signature recognizer to support MNG and
* JNG (as claimed in help screen)
* 20070704 GRR: cleaner fix for narrow interlaced images (account for missing
* passes); added rows per pass for interlaced images; added
* pass-separators in -vv row-filter output; added -c option for
* ANSI colors (filenames, chunk names, row filters, error/OK);
* alphabetized options on usage screen; made const string-arrays
* const
* 20070707 GRR: fixed 64-bit ptrdiff_t printf() issue (%td); added check for
* NULLs (and "discouraged" chars) in tEXt; added check for zero
* values in sCAL; fixed error cascade for private interlace
* method; fixed non-verbose-mode IDAT/PLTE message
* 20070707 GRR: released version 2.3.0
* ----------------------
* 20070709 GRR: tweaked color definitions slightly to work better on terminals
* with white/light backgrounds
* 20070712 GRR: added Makefile.mingw32
* 20100504 GRR: fixed DHDR (pre-MNG-1.0) bug identified by Winfried <[email protected]>