pnginfo

1

pnginfo

display information on the PNG files named

     pnginfo [-t] [-d] [-D] <filenames>

## DESCRIPTION

This command dumps information about the PNG files named on the command line. This command's output is based on the output of the `tiffinfo` command, which is part of the `libtiff` distribution. Each line output by the command represents a value that has been set within the PNG file.

The `-t` command line option forces pnginfo to use libtiff `tiffinfo` style labels, instead of the more relevant png names. The `-d` command line option dumps the bitmap contained by the image to standard out, whilst the `-D` command merely checks that the image bitmap could be extracted from the file. If nothing is reported by `-D`, then there was no error.

The format for the output bitmaps is hexadecimal, with each pixel presented as a triple -- for instance [red green blue]. This means that paletted images et cetera will have their bitmaps expanded before display.

## RETURNS

0 success

1 error

## EXAMPLE

    pnginfo -t toucan.png basn3p02.png basn6a16.png toucan.png...
     Image Width: 162 Image Length: 150
     Bits/Sample: 8
     Samples/Pixel: 1
     Pixel Depth: 8
     Colour Type (Photometric Interpretation): PALETTED COLOUR with alpha (256 colours, 256 transparent)
     Image filter: Single row per byte filter
     Interlacing: Adam7 interlacing
     Compression Scheme: Deflate method 8, 32k window
     Resolution: 0, 0 (unit unknown)
     FillOrder: msb-to-lsb
     Byte Order: Network (Big Endian)
     Number of text strings: 0 of 0

    basn3p02.png...
     Image Width: 32 Image Length: 32
     Bits/Sample: 2
     Samples/Pixel: 1
     Pixel Depth: 2
     Colour Type (Photometric Interpretation): PALETTED COLOUR (4 colours, 0 transparent)
     Image filter: Single row per byte filter
     Interlacing: No interlacing
     Compression Scheme: Deflate method 8, 32k window
     Resolution: 0, 0 (unit unknown)
     FillOrder: msb-to-lsb
     Byte Order: Network (Big Endian)
     Number of text strings: 0 of 0

    basn6a16.png...
     Image Width: 32 Image Length: 32
     Bits/Sample: 16
     Samples/Pixel: 4
     Pixel Depth: 64
     Colour Type (Photometric Interpretation): RGB with alpha channel
     Image filter: Single row per byte filter
     Interlacing: No interlacing
     Compression Scheme: Deflate method 8, 32k window
     Resolution: 0, 0 (unit unknown)
     FillOrder: msb-to-lsb
     Byte Order: Network (Big Endian)
     Number of text strings: 0 of 0

## SEE ALSO

tiffinfo(1) pngchunkdesc(1) pngcp(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.