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PNGCHUNKS(1) PNGCHUNKS(1)

NAME

pngchunks - print information embedded into a PNG file

SYNOPSIS


pngchunks

DESCRIPTION

pngchunks is a program that displays informations from files created according to the Portable Network Graphics file format.

EXAMPLE


pngchunks input.png Chunk: Data Length 13 (max 2147483647), Type 1380206665 [IHDR]
Critical, public, PNG 1.2 compliant, unsafe to copy
IHDR Width: 256
IHDR Height: 256
IHDR Bitdepth: 8
IHDR Colortype: 2
IHDR Compression: 0
IHDR Filter: 0
IHDR Interlace: 0
IHDR Compression algorithm is Deflate
IHDR Filter method is type zero (None, Sub, Up, Average, Paeth)
IHDR Interlacing is disabled
Chunk CRC: -753909967 Chunk: Data Length 6 (max 2147483647), Type 1145523042 [bKGD]
Ancillary, public, PNG 1.2 compliant, unsafe to copy
... Unknown chunk type
Chunk CRC: 554438993 Chunk: Data Length 9 (max 2147483647), Type 1935231088 [pHYs]
Ancillary, public, PNG 1.2 compliant, safe to copy
... Unknown chunk type
Chunk CRC: -757235972 Chunk: Data Length 7 (max 2147483647), Type 1162692980 [tIME]
Ancillary, public, PNG 1.2 compliant, unsafe to copy
... Unknown chunk type
Chunk CRC: 429243611 Chunk: Data Length 831 (max 2147483647), Type 1413563465 [IDAT]
Critical, public, PNG 1.2 compliant, unsafe to copy
IDAT contains image data
Chunk CRC: 1406256926 Chunk: Data Length 0 (max 2147483647), Type 1145980233 [IEND]
Critical, public, PNG 1.2 compliant, unsafe to copy
IEND contains no data
Chunk CRC: -1371381630

SEE ALSO

pngchunkdesc(1), pngcp(1), pnginfo(1).

VERSION

This documentation was generated for pngtools 0.2 by autodocbook (http://www.stillhq.com).

AUTHOR

pngtools is under development by Michael Still (mikal@stillhq.com). All code is Copyright Michael Still 2001 to 2003, and is released under the GNU GPL. Code submissions are welcomed. Contact Michael at the address above if you have something you would like to contribute.

BUGS

There are no known bugs in pngtools. If you find one, please contact mikal@stillhq.com and let me know.

11 August 2022