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To do:
======
- implement coarse calibration to determine settings for analog-front-end
All CCDs encountered so far seem to need about the same settings however.
- Store analog calibration data somewhere.
Use currently used values as default.
- Suggestions by Marcin Cieslak:
- clean up structures
- clean up namespace
- clean up source formatting ('indent --gnu' ?)
- implement real calibration, using 12 bit data at 600 dpi
instead of 8 bit data.at 150 dpi.
-> is now at 600 dpi, not yet at 12 bit
- design a mechanism to set the scan and calibration areas
a) part of HWProps structure, or
b) set by user at first scan
- further investigate scanner registers
a) study backtracking register more
b) identify bits in bit-oriented registers.
- add more error checking ('sanity checking') on parameters
- figure out what the USB interrupts mean that sometimes occur.
Done
====
- Get rid of mytypes.h / fix types
Now an int is implicitly assumed to be 32 bit.
- make backend comply with tstbackend
-> all externs and publics removed when compiling towards sane
- implement sane_cancel properly
-> done by ullsig
- implement timing mechanism for scanner lamp
so scanning can only start if the lamp was already on for 30 seconds
Possible implementation:
On startup: if lamp is off, turn it on and start timer
On scan: if lamp is off, turn it on and start timer. Wait for timer expiry.
On exit: if scanner chip is niash00012 then turn off lamp,
otherwise let the scanner turn it off automatically
-> Implemented by Ullrich Sigwanz
- try out parallel port scanning on HP3400/4300
-> parallel port support will be dropped, no people to test/develop it
- investigate vertical resolution setting of hp3400/4300.
-> experiment with the motor table, formula is already known to generate it
-> 600 dpi is possible by doubling most values in the table
-> 150 dpi can be done by using register 0x06 to skip every other line
- Add separate gamma tables for R, G, B. This should be easy (look at how
other backends do it) but is not really required yet.
-> not required
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