# Re: TODO list

From: Herdegen (Herdegen@t-online.de)
Date: Sun Oct 29 2000 - 19:38:06 PST

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  Hi

  Please, d'nt forget the ACER ScanPrisa 640S

  > > this is the current version of the TODO list. Please check and comment.
  > >
  > Any chance to add new functions here for next release like
  > Warmup time, H/W jpeg scanning & S/W decoding...
  >
  > Best Regards,
  > kw
  >
  >
  > > Bye,
  > > Henning
  > >
  > > TODO (2000-10-29)
  > >
  > > ******** todo ********
  > >
  > > backends
  > > --------
  > > * add new backends (?)
  > > - as6e http://as6edriver.sourceforge.net/
  > > - bh http://www.martoneconsulting.com/sane-bh.html
  > > - Polaroid SprintScan 35 LE [should be included into microtek]
  > > Dick Bruijn <dick@wau.mis.ah.nl>
  > > - primax http://primax.sourceforge.net/
  > > - hp4200 http://hp4200-backend.sourceforge.net/
  > > - v4l2 http://video.inodes.org/sane-v4l2/
  > > - Relisys Scorpio Super 3 SCSI II by Tyler
  > > Bindon <martica@martica.org>.
  > > - Linux Handscanner Ioctl Interface scanner by Harald
  > > Bauer <hbauer@online.de>
  > > - sane-pie (Pacific Image Electronics series of ScanAce SCSI
  > > scanners, and the Devcom 9636/9630 BlackWidow)
  > > http://www.munton.demon.co.uk/sane
  > >
  > > * use DBG(...) instead of fprintf(stderr, ...)
  > > - microtek
  > > - microtek2
  > >
  > > * check #include <lalloca.h> (is this a global system header
  > > on any platform? Otherwise --> "lalloca.h")
  > >
  > > * make authorization_callback work in net-backend and saned
  > >
  > > * check net/saned
  > > - net backend segfaults if saned isn't started
  > > - don't just ignore the byte-order for the image data (needed to
  > > support depths > 8 bits/channel)
  > >
  > > * qcam: implement auto mode for brightness and black-level (don't
  > > just advertise it!) Actually, implement an auto "backend" instead
  > > that can be plugged in front of any backend with brightness/contrast
  > > etc controls
  > >
  > > * qcam: figure out how/if to support bulb mode
  > >
  > > * qcam: convert to use sanei_pio functions instead of direct port
  > > access.
  > >
  > > doc
  > > ---
  > > * add sane manpage
  > > - versioning system
  > > - SANE API
  > >
  > > * add sane-usb manpage
  > >
  > > * Documentation for sanei API
  > > - any ideas for this?
  > >
  > > frontends
  > > ---------
  > > * Remove frontends (at least xscanimage/xcam) from distribution.
  Create
  > > new package for frontends.
  > >
  > > * add new frondends (possibly to frontend package) (?)
  > > - xsane
  > > - scanadf
  > >
  > > * add possibility to use external filters to xscanimage/xsane (?)
  > >
  > > * xscanimage/xcam: support depths > 8 bits/channel
  > >
  > > * xscanimage: provide both scale and textentry for ranges (make new
  > widget)
  > >
  > > * xcam: provide access to option doc strings
  > >
  > > * xscanimage: scanning of images whose heights is not known a priori
  is
  > not
  > > supported yet; this is going to be important for handheld scanners.
  At
  > > least the frontend shouldn't crash or produce invalid pnm files when
  > > it gets a length of -1.
  > >
  > > * xcam: add dithering and support for SANE depths other than 8 bit
  (test
  > > with Mustek backend, for example)
  > >
  > > * xcam: add recording feature (e.g., GIF, JPG, or MPEG)
  > >
  > > * dll: Rewrite to use libtool ltdl library
  > >
  > > * For 3-pass scanners, xscanimage doesn't update the scan progress
  > > bar properly between scans; the scanner seems to be faster than
  > > xscanimage can write to disk (problem: seek for every byte). This
  > > doesn't happen as GIMP-plugin. It doesn't happen in blocking mode
  > > either.
  > >
  > > * Add a check in the frontends if the backend delivers more data than
  > > it announced by sane_get_parameters to avoid segfaults with bad
  > > backends?
  > >
  > > * Adapt xscanimage to new GIMP API. Try to make it backwards
  compatible
  > > with old GIMP versions if possible.
  > >
  > > sanei
  > > -----
  > > * don't install sanei_* headers
  > >
  > > * add sanei_authorize (function for all backends)
  > >
  > > misc
  > > ----
  > > * update libtool versioning system
  > > - -version-info is used but with the current version number system
  > > -release should be used.
  > > - look for AIX problems (overwriting shared libs with eachother
  > > because all libs are named libsane.so.1)
  > > - look for Irix/cc problems (program searches for libsane.so.2
  instead
  > > of libsane.so.1). This was fixed by a "bad hack" which should be
  > > reverted .
  > >
  > > * remove compiler warnings (>400 warnings even in disable-warning
  mode!)
  > >
  > > * Test SANE on different os/platforms, fix possible compilation
  problems
  > > Test methods: scanimage -d pnm:0 --filename=file.pnm -T
  > > scanimage -d
  net:localhost:pnm:0 --filename=file.pnm -T
  > > (not possible if I'm not root on the system)
  > > xscanimage / gimp with xscanimage plugin (where
  > available)
  > > All the above with shared and static libraries.
  > >
  > > * move .desc files for backends that are not included in SANE to
  > > different directory (e.g. backends and external-backends)
  > >
  > > * Add a check for installed sane versions.
  > >
  > > * Print a warning when already a sane version is installed.
  > >
  > > * Maybe add script to detect and deinstall existing sane versions
  > >
  > > ******** done ********
  > >
  > > * 0 is white for sane in lineart and halftone, however, 0 is black for
  > > the other modes. Possible reason: pnm data format. The SANE standard
  > > doesn't talk about this (added point to SANE standard)
  > > * add ADF and TA entries to .desc files (not done, probably webpage gets
  > > too wide)
  > > * check DBG problems for non gcc compilers:
  > > - no backend name output
  > > - only global debug level
  > > * dll: make it robust against it being listed in the configuration
  > > file (currently bad things will happen if dll attempts to load itself)
  > > * scanimage: add information about backend:devicename in the man
  > > page and scanimage --help.
  > > * scanimage: check if devicename starts with a / and print a warning
  > > message
  > > * scanimage: if no devices are detected print a message
  > > * use sanei_config_read() instead of fgets()
  > > * use #include "sane/..." instead of #include <sane/...>
  > > * Update LEVEL2 file. Ideas:
  > > * xscanimage: Fix "Gtk-CRITICAL **: file gtkmain.c: line 534 ..." bug
  > > when no SANE devices found
  > > + PREVIEW: maybe there should be an option to limit the preview
  > > scan to the selected area? YES => this will also make it easier
  > > to avoid the scan area selection to get confused when the user
  > > resizes the preview area in a way that changes the aspect ratio;
  > > in essence we want to allow for the preview-image to be a subregion
  > > of the preview-window (done in xsane)
  > > + xcam: allow disabling of advanced options and tooltips
  > > + man page for xcam
  > > + scanimage: support depths > 8 bits/channel
  > > + upgrade to GTK 1.2 (but stay backwards compatible to 1.0 if possible)
  > > + saned: check_host() consider using strncasecmp()
  > > + GTK: changing the length unit causes dirty pixels in the unit-labels
  > > of the "Geometry Group"
  > > + preview: image data doesn't get preserved properly when changing
  > > scan area size (reproducable by changing Mustek Scan source to TA)
  > > + preview: when popping up the preview window, the current scan area is
  > > not visible
  > > + qcam: test b&w support (need volunteer!)
  > > + hp: convert to use pixel-unit commands only; HP 5P doesn't support
  > > decipoint commands
  > > + mustek: the MFS-06000SP with firmware v3.12 does not seem to need any
  > > line-distance correction at all!?!
  > > + scanimage/xscanimage: when a scanner is busy while probing for
  devices,
  > > the device is dropped silently from the list of available devices;
  this
  > > is confusing particularly when remote controlling a device; it should
  > > be possible to distinguish between a device that's busy and one that's
  > > absent
  > > + xscanimage: program crashes when preview window is popped down while
  > > preview is being acquired!
  > > + Mustek backend crashes when invoked via xscanimage through the network
  > > backend. It does not crash if there are no saved device settings.
  > > + gtkglue: support vectors (requires a "graph" widget; see
  > gimp/app/curves.c)
  > > + xscan: make scrollbar wider
  > > + xscan: at startup or after rebuilding the dialog, the notebook widget
  > > displays both the standard and advanced options simultaneously
  > > + xscan: pnm backend causes crash when hitting "Defaults" button
  > > + scan: add three pass scanning support
  > > + xscan: double-clicking selection should imply OK
  > > + xscan: enabling the gtk_rc_parse() code causes segfault when scanning
  in
  > > three-pass mode (pnm backend) => bug in gtkstyle.c (patch submitted)
  > > + qcam: implement "christmas light" filter
  > > + xscan/qcam: after scanning a preview, the original scan area seems to
  > > get lost somehow => bug in restoring the scan area settings
  > > + qcam: image always comes out black until the blacklevel has been
  > modified;
  > > why is this? => send dummy black-level after qc_reset()
  > > + xscan: provide access option doc strings
  > > + xscan: in GIMP mode, RED/GREEN/BLUE frames are not handled properly
  yet.
  > > + preview: bit-depth is currently ignored (makes lineart etc fail)
  > > + sanei: allow saving/restoring options on a per-device and per-user
  basis
  > > + xcam: replace ugly top-left/bottom-right corner coordinates with
  > something
  > > more useful => they're advanced options now
  > > + preview: modifying the scan area coordinates should update the
  selection
  > > + preview: should we allow saving the current preview image? => yes
  > > + xscan: make it possible to build with gtk alone (i.e., without gimp
  > libs)
  > > + xscan: use same scan-logic as preview (select-based, if possible);
  > > should be able to share most of the code
  > > + replace params.first_frame with params.last_frame---i don't know how
  to
  > > use the former, the latter would be useful for xcam to implement
  support
  > > for individual R/G/B frames
  > > + saned: add multi-host capabilities (selection-phase ... how ??).
  > > + saned: add authorization
  > > + ensure frontend never link sanei_*() functions dynamically
  > > + always define unique names in backends and define weak-aliases for
  > > generic names where elf_alias is available---this should make it
  > > easy to add "pre-load" support to dll.c (either for faster loading or
  > > for systems that don't have dl*())
  > > + make install: don't overwrite existing configuration files
  > > + xcam: let user be able to type in a device string
  > > + mustek: make sane_close() hang around until sane_cancel() has finished
  > > + net: implement it: socket-based backend [Andy is working on this]
  > > + need a camera front end (to allow recording video & audio)
  > > + qcam: allow changing all parameters "on-the-fly" (while scanning)
  > > + qcam backend: implement sane_set_io_mode() and sane_get_select_fd()
  > > + make "scan" print current value of each option
  > > + make "scan" apply any options before printing help message
  > > + initialize backend debug level through environment variable (e.g.,
  > > SANE_DEBUG_LEVEL)
  > > + allow abbreviating string values and make them case-insensitive (as
  long
  > > as they're unique) => see sanei_constrain_value()
  > > + add support to "scan" for setting options to "automatic"
  > > + update documentation and convert to latex & html
  > > + add --width/--height support
  > > + update Mustek backend with new notion of inactive options
  > > + in verbose multibit mode print min/max graylevel value
  > > + Mustek segfaults after ctrl-C => need -Bsymbolic to ensure mustek
  > backend's
  > > references to sane_foo() get resolved within backend
  > > + test parsing of boolean options
  > > + --mode Gray causes segfault
  > > + change scan to use getopt_long
  > > + make Mustek backend work without having to first call get_devices()
  > > + implement meta backend
  > > + bring pnm backend up to speed
  > >
  > > --
  > > Source code, list archive, and docs: http://www.mostang.com/sane/
  > > To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com
  >
  >
  > --
  > Source code, list archive, and docs: http://www.mostang.com/sane/
  > To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com
  >

      --
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  - Next message: Christophe Thommeret: "Re: TODO list"
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