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<TITLE>sane-devel: TODO list</TITLE>
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<META NAME="Author" CONTENT="Henning Meier-Geinitz (hmg-ml@gmx.de)">
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<H1>TODO list</H1>
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<!-- received="Sat Sep 16 11:05:33 2000" -->
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<!-- isoreceived="20000916180533" -->
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<!-- sent="Sat, 16 Sep 2000 20:14:10 +0200" -->
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<!-- isosent="20000916181410" -->
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<!-- name="Henning Meier-Geinitz" -->
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<!-- email="hmg-ml@gmx.de" -->
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<!-- subject="TODO list" -->
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<!-- id="20000916201410.A26192@hmg1.vortex.swb.de" -->
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<STRONG>From:</STRONG> Henning Meier-Geinitz (<A HREF="mailto:hmg-ml@gmx.de?Subject=Re:%20TODO%20list&In-Reply-To=<20000916201410.A26192@hmg1.vortex.swb.de>"><EM>hmg-ml@gmx.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sat Sep 16 2000 - 11:14:10 PDT
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Hi,
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<BR>
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<P>this is an update of the TODO-list from CVS.
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<BR>
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<P>TODO (2000-09-16)
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<BR>
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<P>******** todo ********
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<BR>
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<P>backends
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<BR>
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--------
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<BR>
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* add new backends (?)
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<BR>
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- as6e <A HREF="http://as6edriver.sourceforge.net/">http://as6edriver.sourceforge.net/</A>
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<BR>
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- bh <A HREF="http://www.martoneconsulting.com/sane-bh.html">http://www.martoneconsulting.com/sane-bh.html</A>
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<BR>
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- Polaroid SprintScan 35 LE [should be included into microtek]
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<BR>
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Dick Bruijn <<A HREF="mailto:dick@wau.mis.ah.nl?Subject=Re:%20TODO%20list&In-Reply-To=<20000916201410.A26192@hmg1.vortex.swb.de>">dick@wau.mis.ah.nl</A>>
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<BR>
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- primax <A HREF="http://primax.sourceforge.net/">http://primax.sourceforge.net/</A>
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<BR>
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- hp4200 <A HREF="http://hp4200-backend.sourceforge.net/">http://hp4200-backend.sourceforge.net/</A>
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<BR>
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<P> * use DBG(...) instead of fprintf(stderr, ...)
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<BR>
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- microtek
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<BR>
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- microtek2
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<BR>
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<P> * use sanei_config_read() instead of fgets()
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<BR>
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- umax (will be fixed with the next backend release)
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<BR>
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<P> * use #include "sane/..." instead of #include <sane/...>
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<BR>
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- umax (see above)
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<BR>
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<P> * check #include <lalloca.h> (is this a global system header
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<BR>
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on any platform? Otherwise --> "lalloca.h")
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<BR>
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<P> * make authorization_callback work in net-backend and saned
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<BR>
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<P> * check net/saned
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<BR>
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- net backend segfaults if saned isn't started
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<BR>
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- don't just ignore the byte-order for the image data (needed to
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<BR>
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support depths > 8 bits/channel)
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<BR>
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<P> * mustek: for 3-pass scanners, it is said that xscanimage doesn't update
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<BR>
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the scan progress bar properly between scans; it is said to stop at
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<BR>
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90%, start the next pass, and once the next pass has started, it moves
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<BR>
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on to 100% and the progress bar disappears at that point
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<BR>
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<P> * qcam: implement auto mode for brightness and black-level (don't
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<BR>
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just advertise it!) Actually, implement an auto "backend" instead
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<BR>
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that can be plugged in front of any backend with brightness/contrast
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<BR>
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etc controls
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<BR>
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<BR>
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* qcam: figure out how/if to support bulb mode
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<BR>
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<P>doc
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<BR>
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<PRE>
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---
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* add sane manpage
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- versioning system
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- SANE API
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<P> * add sane-usb manpage
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<P> * Documentation for sanei API
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- any ideas for this?
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<P>frontends
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---------
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* Remove frontends (at least xscanimage/xcam) from distribution. Create
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new package for frontends.
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<P> * add new frondends (possibly to frontend package) (?)
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- xsane
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- scanadf
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<P> * use #include "sane/..." instead of #include <sane/...>
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- umax
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<P> * add possibility to use external filters to xscanimage/xsane (?)
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<P> * xscanimage/xcam: support depths > 8 bits/channel
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<P> * xscanimage: provide both scale and textentry for ranges (make new widget)
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<P> * xcam: provide access to option doc strings
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<P> * xscanimage: scanning of images whose heights is not known a priori is not
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supported yet; this is going to be important for handheld scanners
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<P> * xcam: add dithering and support for SANE depths other than 8 bit (test
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with Mustek backend, for example)
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<P> * xcam: add recording feature (e.g., GIF, JPG, or MPEG)
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<P> * dll: make it robust against against it being listed in the configuration
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file (currently bad things will happen if dll attempts to load itself)
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* xscanimage: Fix "Gtk-CRITICAL **: file gtkmain.c: line 534 ..." bug
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when no SANE devices found
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<P>sanei
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-----
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* don't install sanei_* headers (?)
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<P> * add sanei_authorize (function for all backends)
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<P>misc
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----
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* update libtool versioning system
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- -version-info is used but with the current version number system
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-release should be used.
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- look for AIX problems (overwriting shared libs with eachother
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because all libs are named libsane.so.1)
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- look for Irix/cc problems (program searches for libsane.so.2 instead
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of libsane.so.1). This was fixed by a "bad hack" which should be
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reverted .
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<P> * check DBG problems for non gcc compilers:
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- no backend name output
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- only global debug level
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<P> * remove compiler warnings (>400 warnings even in disable-warning mode!)
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<P> * Update LEVEL2 file. Ideas:
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- add support for buttons etc. on the scanner/camera
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- Change of the version number system (the current standard version
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system is not really used in the SANE distribution).
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- add more frame types
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- add alpha channel so that RGBI scanners like Nikon LS-20 can
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send infra-red info back to gimp for post-processing
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- Might be nice if arbitrarily defined multiple channels, were possible.
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Some way of indicating the number of channels possible, and some
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details (wavelength, bandwidth, ...)
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- (see sane-devel archive for more ideas)
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<P> * Test SANE on different os/platforms, fix possible compilation problems
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Test methods: scanimage -d pnm:0 --filename=file.pnm -T
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scanimage -d net:localhost:pnm:0 --filename=file.pnm -T
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(not possible if I'm not root on the system)
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xscanimage / gimp with xscanimage plugin (where available)
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All the above with shared and static libraries.
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<P> * move .desc files for backends that are not included in SANE to
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different directory (e.g. backends and external-backends)
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<P> * add ADF and TA entries to .desc files
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<P> * add alpha channel so that RGBI scanners like Nikon LS-20 can
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send infra-red info back to gimp for post-processing
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<P> * Add a check for installed sane versions.
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<P> * Print a warning when already a sane version is installed.
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* Maybe add script to detect and deinstall existing sane versions
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<P> * 0 is white for sane
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<P>******** done ********
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<P>+ PREVIEW: maybe there should be an option to limit the preview
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scan to the selected area? YES => this will also make it easier
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to avoid the scan area selection to get confused when the user
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resizes the preview area in a way that changes the aspect ratio;
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in essence we want to allow for the preview-image to be a subregion
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of the preview-window (done in xsane)
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+ xcam: allow disabling of advanced options and tooltips
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+ man page for xcam
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+ scanimage: support depths > 8 bits/channel
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+ upgrade to GTK 1.2 (but stay backwards compatible to 1.0 if possible)
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+ saned: check_host() consider using strncasecmp()
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+ GTK: changing the length unit causes dirty pixels in the unit-labels
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of the "Geometry Group"
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+ preview: image data doesn't get preserved properly when changing
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scan area size (reproducable by changing Mustek Scan source to TA)
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+ preview: when popping up the preview window, the current scan area is
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not visible
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+ qcam: test b&w support (need volunteer!)
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+ hp: convert to use pixel-unit commands only; HP 5P doesn't support
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decipoint commands
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+ mustek: the MFS-06000SP with firmware v3.12 does not seem to need any
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line-distance correction at all!?!
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+ scanimage/xscanimage: when a scanner is busy while probing for devices,
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the device is dropped silently from the list of available devices; this
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is confusing particularly when remote controlling a device; it should
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be possible to distinguish between a device that's busy and one that's
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absent
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+ xscanimage: program crashes when preview window is popped down while
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preview is being acquired!
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+ Mustek backend crashes when invoked via xscanimage through the network
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backend. It does not crash if there are no saved device settings.
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+ gtkglue: support vectors (requires a "graph" widget; see gimp/app/curves.c)
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+ xscan: make scrollbar wider
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+ xscan: at startup or after rebuilding the dialog, the notebook widget
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displays both the standard and advanced options simultaneously
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+ xscan: pnm backend causes crash when hitting "Defaults" button
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+ scan: add three pass scanning support
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+ xscan: double-clicking selection should imply OK
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+ xscan: enabling the gtk_rc_parse() code causes segfault when scanning in
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three-pass mode (pnm backend) => bug in gtkstyle.c (patch submitted)
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+ qcam: implement "christmas light" filter
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+ xscan/qcam: after scanning a preview, the original scan area seems to
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get lost somehow => bug in restoring the scan area settings
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+ qcam: image always comes out black until the blacklevel has been modified;
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why is this? => send dummy black-level after qc_reset()
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+ xscan: provide access option doc strings
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+ xscan: in GIMP mode, RED/GREEN/BLUE frames are not handled properly yet.
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+ preview: bit-depth is currently ignored (makes lineart etc fail)
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+ sanei: allow saving/restoring options on a per-device and per-user basis
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+ xcam: replace ugly top-left/bottom-right corner coordinates with something
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more useful => they're advanced options now
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+ preview: modifying the scan area coordinates should update the selection
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+ preview: should we allow saving the current preview image? => yes
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+ xscan: make it possible to build with gtk alone (i.e., without gimp libs)
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+ xscan: use same scan-logic as preview (select-based, if possible);
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should be able to share most of the code
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+ replace params.first_frame with params.last_frame---i don't know how to
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use the former, the latter would be useful for xcam to implement support
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for individual R/G/B frames
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+ saned: add multi-host capabilities (selection-phase ... how ??).
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+ saned: add authorization
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+ ensure frontend never link sanei_*() functions dynamically
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+ always define unique names in backends and define weak-aliases for
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generic names where elf_alias is available---this should make it
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easy to add "pre-load" support to dll.c (either for faster loading or
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for systems that don't have dl*())
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+ make install: don't overwrite existing configuration files
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+ xcam: let user be able to type in a device string
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+ mustek: make sane_close() hang around until sane_cancel() has finished
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+ net: implement it: socket-based backend [Andy is working on this]
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+ need a camera front end (to allow recording video & audio)
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+ qcam: allow changing all parameters "on-the-fly" (while scanning)
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+ qcam backend: implement sane_set_io_mode() and sane_get_select_fd()
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+ make "scan" print current value of each option
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+ make "scan" apply any options before printing help message
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+ initialize backend debug level through environment variable (e.g.,
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SANE_DEBUG_LEVEL)
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+ allow abbreviating string values and make them case-insensitive (as long
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as they're unique) => see sanei_constrain_value()
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+ add support to "scan" for setting options to "automatic"
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+ update documentation and convert to latex & html
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+ add --width/--height support
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+ update Mustek backend with new notion of inactive options
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+ in verbose multibit mode print min/max graylevel value
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+ Mustek segfaults after ctrl-C => need -Bsymbolic to ensure mustek backend's
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references to sane_foo() get resolved within backend
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+ test parsing of boolean options
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+ --mode Gray causes segfault
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+ change scan to use getopt_long
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+ make Mustek backend work without having to first call get_devices()
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+ implement meta backend
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+ bring pnm backend up to speed
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<P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20TODO%20list&In-Reply-To=<20000916201410.A26192@hmg1.vortex.swb.de>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0147.html">Ingo Wilken: "Re: SANE on Linux/x86 with SCSI ISA card"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0145.html">Henning Meier-Geinitz: "Re: scanimage always connects to /dev/video"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0154.html">Jochen Eisinger: "authorization support (TODO list)"</A>
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