sane-project-backends/doc/gt68xx/gt68xx.CHANGES

V 1.0-28 (2002-10-31)

- Reduce scan width of 2400 TA Plus: otherwise the black mark would create
  light vertical stripes.
- Removed default parameters. Set AFE and exposure in every model struct.
- Faster automatic gain setting for the CIS scanners. The default values from
  the model struct and the last values are used for calculation.
- Set default AFE values for ScanExpress 1200 UB Plus, BearPaw 1200 CU, BearPaw
  2400 CU Plus.

V 1.0-27 (2002-10-25)

- Bugfix: override applies to all devices found by the last usb line.
- Individual resolutions + depth values for every scanner.
- Bugfix: Mirroring code had an off-by-one error (garbage in the first column).
- Artec Ultima 2000, MD 9385: Removed 1200 dpi mode (doesn't seem to work?),
  added 100 and 200 dpi modes. Renamed model to Artec Ultima 2000, because
  that's probably the "father" of all the clones.
- Mustek BearPaw 1200 CU: Added 200 dpi mode.
- Added manual page.
- Removed override for Packard Bell (seems to be exact Bearpaw 1200 CU Plus
  clone).
- Removed override for Trust Copmact Scan and Medion/Tevion/Lifetec LT 9452
  (Mustek ScanExpress 1200 UB Plus clones).
- Removed override for Tevion MD 9458 (seems to be an Artec Ultima 2000 (e +?)
  clone). 
  
V 1.0-26 (2002-10-22)

- Several fixes for Medion MD-9385 and Artec Ultima 2000 based scanners. The
  Cytron MD 9385 works now.
- Diabled Plustek-like firmware check again, didn't work for MD 9385.
- Splitted flags for mirror_x and sset_home.

V 1.0-25 (2002-10-20)

- Fixed segfault for GT-6801 based scanners.
- Added override for Medion MD9385.
- Changed firmware detection code for Plustek scanners.
- CIS autogain seraches max white and min black now (removed segment code).
  Hopefully no more vertical stripes.
- Adjusted ScanExpress 1200 UB Plus and BearPaw 1200 CU geometry and white
  strip.

V 1.0-24 (2002-10-12)

- Added "override" keyword for gt68xx.conf. So model settings can be changed
  at run-time. If set up correctly, firmware lines aren't necessary any more.
- Added support for the Mustek BearPaw 2400 CU.
- Tevion hack (now enabled by override option) also mirrors coordinates.
- Mustek BearPaw 1200 TA 1200 dpi is set up for the Windows firmware again.
- Added some basic I18N markers.
- Removed option backtrack (setup automatically now).

V 1.0-23 (2002-10-10),

- Added detection of Mustek BearPaw A3 USB.
- Added auto-detection of lamp status for CCD scanners (from David Stevenson).
  No wait for the fixed time of 40 seconds any more.
- The scan slider of the GT-6816 bsed scanners don't move home after
  calibration/gain. TA mode is faster therefore.
- Added hack for Tevion MD 9458 to solve the mirror and "scan-slider doesn't
  come home" problems.
- Fixed BearPaw 1200 TA 1200 dpi problem.
- Fixed manual firmware selection in gt68xx.conf.
- Added warning if power supply isn't ok.

V 1.0-22 (2002-10-07),

- Mustek Bearpaw 2400 CU Plus works in gray mode again
- Line calibration uses the bit depth of the main scan now.
- Vendor, product ids and other information is printed when debugging is active
- Fixed segfault in attach ().
- Fixed endianess issues (untested).
- Code cleanup.

V 1.0-21 (2002-10-07),

- Added 12 bit modes for all scanners (Sergey Vlasov).
- Fixed 2400 TA Plus in 12/16 bit modes in 1200/2400 dpi.
- Disable depth option in lineart mode and for some scanners in gray mode.
- Scan preview in 8 bit.

V 1.0-20 (2002-10-06)

- Calibration of the CCD scanners in gray mode should work better now.
- Added 50 dpi mode for BearPaw 2400 TA Plus. Faster preview.
- By default, /usr/local/share/sane/gt68xx/ is checked for firmware files.
  Manual adjustment is only necessary if the firmware name is different from
  default or at a different path.
- Mixed and lower-case is tried when loading the firmware.
- Adjusted geometry of BearPaw 1200 TA and 2400 TA.
- Automatic gain fixes for TA mode.
- Don't show "lamp off" option for CIS scanners.

V 1.0-19 (2002-10-01)

- Various minor fixes and adjustments concerning calibration.
- Fixed sane_open detection of already known devices.
- Added missing usleep for 2400 CU Plus.
- Adjusted scan area for 1200 TA.
- Removed detection of Artec Umltima 2000 (product id 0x4001) as this is not
  a GT-68xx based scanner.
- Fixed some compilation warnings.
- Minor misc fixes.

V 1.0-18 (2002-10-01)

- Added detection of Artec Ultima 2000.
- Updated Lexmark X70 settings.
- Fixed segfault that occured when no device was detected.
- Changed test for loaded firmware for GT-6801 scanners.

V 1.0-17 (2002-10-01)

- Added support for the Lexmark X70 and X73 scanners
- Fixed shifted columns problem for BearPaw 2400 TA Plus and maybe 2400 TA.
- Fixed y-margin for the BearPaw 1200 TA (at least I hope so)
- Fixed BearPaw 2400 CU Plus firmware name
- Removed gt68xx_test program from distribution. Didn't work anymore anyway.

V 1.0-16 (2002-09-29)

- Added calibration and auto-gain support for transparency adapter mode.
- In transparency adapter mode, only the usable scan area is shown.
- Autogain is repeated when source was change.d
- Fixed geometry of ScanExpress 1200 UB Plus.
- Fixed freeze at the end of scan for GT-6801-based scanners.

V 1.0-15 (2002-09-27)

- Low level reading is done in a separate process now (shm is back). Some
  scanners should be faster therefore.
- Added option "force backtracking". If disabled, no backtracking occurs
  (->faster, but lines are lost).
- Fixed hang in reader_process.
- Fixed "auto gain once" (which really worked only once :-/)

V 1.0-14 (2002-09-25)

- Added basic transaprency adapter support for the Mustek Bearpaw 2400 TA
  Plus. Other TA models may work also. No calibration or other nice features,
  just pure external lamp on, internal lamp of.
- Support for the Mustek BearPaw 1200 Cu Plus (hopefully).
- Added Lineart (black/white) mode.
- Added warming-up for CCD lamps and an option to disable shutting off the
  lamp.
- Print scanning time (debug level 3).
- Removed "safe preview". Not longer necessary.

V 1.0-13 (2002-09-25)

- Major rewrite of the low level scan setup functions. Probably has broken
  some of the supported scanners.
- Geometry in the model struct is in mm now. Values for most scanners are
  untested.
- Added support for Mustek Bearpaw 2400 CU Plus.
- CCD lamp is turned on when opening the frontend and turned off when leaving.
- Auto gain is done only for the first scan.
- Manual gain etc. options don't show up in automatic mode.
- Faster automatic gain.
- Bugfixes: gain/offset options, moving top-margin and exposure control.

V 1.0-12 (2002-09-23)

- Fixed bug concerning too little data transferred in sane_read.
- Added detection of the Packard Bell Diamond 1200.
- Changed some scanner names and added support for custom names in config file.
- Use the size of the scan area in the model struct. This value may need
  some tweaking for the gt6816 scanners.
- Fixed the size of scanarea for the BearPaw 1200 CU/ScanEpress 1200 UB Plus
- Disabled 16 bit mode for GT-6801 scanners. This isn't even supported by the
  Windows driver.
- General code cleanup. Removed gt68xx_mustek.c and SHM support.
- Made the .tar.gz file size smaller.

V 1.0-11 (2002-09-22)

- 1200 dpi works now at least for the BearPaw 1200 CU. Maybe also for the
  other scanners.
- Added manual and automatic offset/gain/exposure control for the CIS
  scanners. The image should be better now.
- Added debug option to scan the full scan area including the calibration
  strip.

V 1.0-10 (2002-09-18)

- 50, 75, 150, 300, 600 work now for the GT6801 scanners
- Preview is fast again (can be set to safe/slow mode)
- Calibration can be disabled by option
- Added some more safety checks for USB commands
- The gt68xx_test program can be used again

V 1.0-9 (2002-09-17)

- Added option to disable automatic gain (->less ugly colors for GT-6801
  based models)
- Fixed segfault that occured when a scan was cancelled
- Preview uses slow but safe (?) 300 dpi 8 bit modes now
- Fixed bug concerning X0/Y0 coordinates
- Started implementing dpeth option (doesn't work yet)
- Internal changes (use high_scan's wait_for_positioning)

V 1.0-8 (2002-09-16)

- Fixed distortion problem in color mode
- Selected safer default option values
- Changed file names to be more appropriate for SANE

V 1.0-7 (2002-09-16)

- Initial version based on Sergey Vlasov's gt68xx backend v 0.0.6
- Added basic SANE interface in gt68xx.c
- Added SANE options and SANE variables to gt68xx_high.h
- Minor adjustments to gt68xx_low.h
- Added support for Mustek BearPaw 2400 TA Plus