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Fri Dec 5 18:10:52 PST 1997
Geoffrey T. Dairiki <dairiki@alumni.caltech.edu>
Here is a new HP backend. It's name is, appropriately, ``newhp''.
It is still in the pre-alpha stages but mostly works on my ScanJet 5P.
It is completely untested on other scanners, but might hopefully work
on ScanJet models IIp, IIc, IIcx, 3p, 3c, 4c, 4p, and 5p.
I've only really tested this with xscanimage.
Some features included in this backend which aren't in the old
HP driver are:
Support for custom tonemaps (gamma-maps). For some reason I
can't get the 10-bit tonemaps working with my 5p, so for you
only get a single tonemap (it still works in color mode, but
you don't get individual control over each R/G/B channel.)
You can enable the scanjets "Auto Threshold" mode when scanning
line-art. I can't notice that it does much though....
Added an option to control the scan speed.
Added an option to select the dither pattern used in half-tone mode.
I don't think that custom dither patterns are working correctly,
and in any case, with the current front-ends, there is no convenient
way to set a custom dither pattern....
Added an option to select the color correction matrixes.
This also seems to be flaky. Again the current front-ends do not provide
a decent way to adjust the custom color matrix.
Tue Feb 24 20:00:00 UT+1 1998
Peter Kirchgessner <pkirchg@aol.com>
Picked up the sources because they did not find their way to the
SANE-package up to now. And because I want to have a better support
for the HP Photosmart Photoscanner. Renamed the backend from newhp
to xhp just to get a better acceptance.
Added an option to perform calibration. Upload and download calibration data
Added options for horizontal/vertical mirroring. Vertical mirroring
is performed by loading image completely into memory before
sending to frontend.
Uses SCSI-flushing more often because otherwise the scanner did not
accept all of the commands.
Test support of commands to be independent from inquired
model number.
Wed Mar 28 10:00:00 UT+1 1998
Bring it on its way to the SANE-project. Geoffrey accepted to add
licence information to the files as long as no one has to pay for the code.
Sun Jun 07 15:00:00 UT+1 1998
Added unload button
Fixed problem with custom gamma table
Sat Nov 14 14:00:00 UT+1 1998
Show calibrate button on Photosmart only for print media
Add HP 6200 C
Suppress halftone mode on photosmart (it is not supported)
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