🚀 go-pugleaf

In article <1992Oct27.222522.19519@klaava.Helsinki.FI> jokipalt@klaava.Helsinki.FI (Samuli Jokipaltio) writes:
>I have few images compressed with Adobe Photoshop's "Adobe JPEG
>Compress" Plug-in and they are in PostScript format. The header states
>that I must have a level 2 printer to print these with, but when I try
>to print them with my LaserWriter IIf, it only gives an PostScript error

There's a bug in this compression filter for CMYK images.  You need to
change the "/Decode ..." array from "[0 1 0 1 0 1]" to "[1 0 1 0 1 0 1 0]"
and change the colorspace to "/DeviceCMYK" (from device RGB).

The filter sets up a proper header for the RGB data, but does not alter this
header to reflect the 4-channel case.

This may be your problem, although our level-2 devices give ioerror when
this happens, not typecheck.

Also, I haven't looked at grayscale images (if the filter even supports
them!).  If this is what you are doing, and you are still getting the RGB
header, you'll need to change to "/Decode [0 1]" and /DeviceGRAY colorspace.

KD

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