#1 enable transparency adapter (xpa)

[Martin]

This is a patch for the hp5400 backend which enables
the xpa transparency adapter.
It works for me but still needs some cleanup and testing.
I made the patch against the daily snapshot of sane-cvs
of 1 december 2003.
It will probably work well with a current cvs snapshot at
http://www.sane-project.org/snapshots/

I developed and tested it under windows.
Recent sane-backends can compile and work under
cygwin if you install libusb-win32. (I had to make two
small modifications to compile under cygwin, these are in
sane_cygwin.patch)

Please test and also test the normal flatbed
functionality. I had to tweak the moment and timing of
the lamp warmup to get rid of some errors.

Have fun,

Martin DvH

[Martin]

patch which enables transparency adapter (xpa)

[Thomas Soumarmon]

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The XPA lamp turns on OK and the scan is OK except for the edges that looks to
be a bit incorrect. It should work enough to already be able to scan negatives with
it.
Thanks Martin,

Thomas.