Man page 1 : ximtoppm

ximtoppm - convert an Xim file into a portable pixmap

ximtoppm \fR[--alphaout={alpha-filename,-}] [ ximfile ]

Reads an Xim file as input. Produces a portable pixmap as output. The Xim toolkit is included in the contrib tree of the X.V11R4 release.

• --alphaout= alpha-filename
      .B ximtoppm creates a PGM (portable graymap) file containing the alpha channel values in the input image. If the input image doesn't contain an alpha channel, the alpha-filenamefile contains all zero (transparent) alpha values. If you don't specify

R --alphaout ,

ximtoppm does not generate an alpha file, and if the input image has an alpha channel,

ximtoppm simply discards it. If you specify

- as the filename,

ximtoppm writes the alpha output to Standard Output and discards the image. Actually, an Xim image can contain an arbitrary fourth channel -- it need not be an Alpha channel.

ximtoppm extracts any fourth channel it finds as described above; it doesn't matter if it is an alpha channel or not. See

R pnmcomp (1) for one way to use the alpha output file.

All options can be abbreviated to their shortest unique prefix.

R pnmcomp (1),

R ppm (5)

Copyright (C) 1991 by Jef Poskanzer.