1Fri Dec  5 18:10:52 PST 1997
2Geoffrey T. Dairiki <dairiki@alumni.caltech.edu>
3
4Here is a new HP backend.  It's name is, appropriately, ``newhp''.
5
6It is still in the pre-alpha stages but mostly works on my ScanJet 5P.
7It is completely untested on other scanners, but might hopefully work
8on ScanJet models IIp, IIc, IIcx, 3p, 3c, 4c, 4p, and 5p.
9
10I've only really tested this with xscanimage.
11
12Some features included in this backend which aren't in the old
13HP driver are:
14
15  Support for custom tonemaps (gamma-maps).  For some reason I
16  can't get the 10-bit tonemaps working with my 5p, so for you
17  only get a single tonemap (it still works in color mode, but
18  you don't get individual control over each R/G/B channel.)
19
20  You can enable the scanjets "Auto Threshold" mode when scanning
21  line-art.  I can't notice that it does much though....
22
23  Added an option to control the scan speed.
24
25  Added an option to select the dither pattern used in half-tone mode.
26  I don't think that custom dither patterns are working correctly,
27  and in any case, with the current front-ends, there is no convenient
28  way to set a custom dither pattern....
29
30  Added an option to select the color correction matrixes.
31  This also seems to be flaky.   Again the current front-ends do not provide
32  a decent way to adjust the custom color matrix.
33
34
35Tue Feb 24 20:00:00 UT+1 1998
36Peter Kirchgessner <pkirchg@aol.com>
37
38Picked up the sources because they did not find their way to the
39SANE-package up to now. And because I want to have a better support
40for the HP Photosmart Photoscanner. Renamed the backend from newhp
41to xhp just to get a better acceptance.
42
43  Added an option to perform calibration. Upload and download calibration data
44
45  Added options for horizontal/vertical mirroring. Vertical mirroring
46  is performed by loading image completely into memory before
47  sending to frontend.
48
49  Uses SCSI-flushing more often because otherwise the scanner did not
50  accept all of the commands.
51
52  Test support of commands to be independent from inquired
53  model number.
54
55Wed Mar 28 10:00:00 UT+1 1998
56
57Bring it on its way to the SANE-project. Geoffrey accepted to add
58licence information to the files as long as no one has to pay for the code.
59
60Sun Jun 07 15:00:00 UT+1 1998
61
62  Added unload button
63
64  Fixed problem with custom gamma table
65
66Sat Nov 14 14:00:00 UT+1 1998
67
68  Show calibrate button on Photosmart only for print media
69  Add HP 6200 C
70  Suppress halftone mode on photosmart (it is not supported)
71