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ximtoppm - convert an Xim file to a PPM image |
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ximtoppm [--alphaout={alpha-filename,-}] [ximfile] |
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This program is part of Netpbm(1). ximptoppm reads an Xim file as input and produces a PPM image as output. The Xim toolkit is included in the contrib tree of the X.V11R4 release. |
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You can abbreviate any option to its shortest unique prefix. |
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--alphaout=alpha-filename |
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ximtoppm creates a PGM file containing the alpha channel values in the input image. If the input image doesn’t contain an alpha channel, the alpha-filename file contains all zero (transparent) alpha values. If you don’t specify --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 pamcomp(1)foronewaytouse the alpha output file. |
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pamcomp(1), ppm(1) |
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Copyright (C) 1991 by Jef Poskanzer. |