Dfilter is a program that will correct incompatibilities in
Photon Paint and Pixmate images. This should be helpful for
owners of such programs as the Director, TV*Show, etc., where
some images either won't load or cause GURU's.
To use, from the CLI, type:
dfilter filename
Where "filename" is the name of the picture file to be modified.
Photon Paint inserts a proprietary IFF chunk as the first chunk
of the file. Some readers assume that the first chunk will be
an BMHD, and treat any file that doesn't start with such a
chunk as bad.
Pixmate saves the viewmodes in the CAMG chunk, with the SPRITES
and VP_HIDE bits on, which can cause problems in readers that
don't mask these out.
It is assumed that later versions of these programs, as well as
the reader programs will be improved so that "dfilter" will no
longer be necessary, but in the meantime, this program can be
used.
Dfilter will reshuffle the chunks so that the BMHD is the first
chunk, and modify the CAMG chunk if necessary.
Dfilter works "in place", that is, it modifies the file you
specify without creating a second file. If you feel uncomfortable
about such a program modifying your only copy of a given image
file, copy the image file to RAM first, run dfilter, and check
with a display program before replacing your only copy of the
image.
