ppmtoppmx

Syntax

ppmtoppmx --help
ppmtoppmx [-name iname] [name]
ppmtoppmx -alpha alpha [-name iname] [name]
ppmtoppmx -nz [-name iname] [name]

Synopsis

Convert a Portable PixMap (PPM) image to an extended Portable PixMap (PPMX) image.

Options

`--help`	print the help message and exit.
`-name iname`	set the image name in the output image to iname.
`-alpha alpha`	set alpha channel for all pixels to the value given by alpha. The value can be given as a decimal, percentage or hexadecimal.
`-nz`	set alpha channel to full on (0xff) for any non-zero value pixel in the input image.
`name`	input image filename. If this is omitted the image will be read from standard input.

Description

Convert a Portable PixMap (PPM) image to an extended Portable PixMap (PPMX) image.

The PPMX image file is written to standard output.

Extended Portable PixMap files are an enhanced form of PPM files that include an extra alpha channel mask.

Examples

ppmtoppmx -name "test" inp.ppm > out.ppmx

Convert PPM file inp.ppm to the PPMX file out.ppmx. Set the name of the image to "test".

ppmtoppmx -nz inp.ppm > out.ppmx

Convert PPM file inp.ppm to the PPMX file out.ppmx. The alpha channel is set to full on for any non-zero pixels in the input image.