xpmtoppm
Convert XPM pixmaps to PPM format
TLDR
Convert an XPM image to PPM
$ xpmtoppm [input.xpm] > [output.ppm]
Read from standard input$ cat [input.xpm] | xpmtoppm > [output.ppm]
Extract the alpha (transparency) channel to a separate PBM file$ xpmtoppm --alphaout=[alpha.pbm] [input.xpm] > [output.ppm]
SYNOPSIS
xpmtoppm [options] [file]
DESCRIPTION
xpmtoppm reads an X11 pixmap (XPM version 1 or 3) as input and produces a PPM image as output. It handles transparency and color-mapped images. Part of the Netpbm toolkit.
PARAMETERS
--alphaout=file
Write the transparency mask to the specified PBM file. If the input has no transparency information, the file contains all white (opaque) values. Specify `-` to write the alpha output to standard output instead of the image.
INSTALL
sudo apt install netpbm
sudo dnf install netpbm
sudo pacman -S netpbm
sudo apk add netpbm
sudo zypper install netpbm
brew install netpbm
nix profile install nixpkgs#netpbm
CAVEATS
Only a limited set of XPM version 3 features are supported; many valid XPM images may be rejected. Input lines longer than 8K characters cause an error.