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- pngtopnm(1) AMIGA (06 June 1995) pngtopnm(1)
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- NAME
- pngtopnm - convert a Portable Network Graphics file into a
- portable anymap
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- SYNOPSIS
- pngtopnm [-verbose] [-text] [-alpha|-mix] [pngfile]
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- DESCRIPTION
- Reads a Portable Network Graphics as input. Produces a
- portable anymap as output. The type of the output file
- depends on the input file - if it's black & white, a pbm
- file is written, else if it's grayscale a pgm file, else a
- ppm file.
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- OPTIONS
- -verbose
- Display the format of the input file and the type of
- the output file.
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- -alpha
- Output the alpha channel or transparency mask of the
- image. The result is either a pbm file or pgm file,
- depeding on whether different levels of transparency
- appear.
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- -mix Compose the image with the transparency or alpha mask
- against a black background.
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- -text
- Print tEXt, zTXt and tIME chunks to stderr.
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- All flags can be abbreviated to their shortest unique
- prefix.
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- SEE ALSO
- pnmtopng(1), ptot(1), pnm(5)
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- BUGS
- Due the fact that PNM files only include image data, it is
- not possible to preserve extra data (e.g. comments) stored
- with an image file. Instead of pngtopnm|pnmtoxxx, a specific
- converter should be used, if available. E.g. ptot (PNG to
- TIFF conversion), etc. (This is not really a bug in
- pngtopnm, more a general problem with intermediate formats.)
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- Information about scaling is not used. sBIT chunks are
- ignored.
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- -mix should use the background color, if specified, instead
- of black.
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- AUTHOR
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- Page 1 (printed 7/15/95)
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- pngtopnm(1) AMIGA (06 June 1995) pngtopnm(1)
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- Copyright (C) 1995 by Alexander Lehmann.
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- Page 2 (printed 7/15/95)
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