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Added entry about DBG warnings. 

Henning Meier-Geinitz <henning@meier-geinitz.de>
DEVEL_2_0_BRANCH-1
Henning Geinitz 2002-02-19 19:35:23 +00:00
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----- todo:
TODO (2002-02-17)
- all frontends: support depths > 8 bits/channel
- net: don't just ignore the byte-order for the image data (needed to
******** todo ********
backends
--------
* Add new backends (?)
- hp4200 http://hp4200-backend.sourceforge.net/
- v4l2 http://video.inodes.org/sane-v4l2/
- Relisys Scorpio Super 3 SCSI II
Mark Plowman <sane-devel@plowman.xs4all.nl>
http://www.xs4all.nl/~plowman/
- Linux Handscanner Ioctl Interface scanner by Harald
Bauer <bauer-h@web.de>
- viceo (Visioneer OneTouch 8600)
http://www.littlecms.com/iphoto/otlinux.htm
- Genius Vivid Pro USB, Colorado USB 19200, Visioneer OneTouch 7600
IBM IdeaScan 2000 USB
http://homepages.paradise.net.nz/stevenel/scanner/
- Fujitsu M3091DCd support
Frederik Ramm <frederik@remote.org>
http://www.remote.org/frederik/projects/software/sane/
- Canon FB620S flatbed scanner and FS2710 film scanner
ftp://stthd0.pc.uni-koeln.de/pub/canon-1.08.tar.gz
Ulrich Deiters <ukd@xenon.pc.Uni-Koeln.DE>
- Hewlett-Packard ScanJet 3300C / 3400C and 4300C (wip)
http://sourceforge.net/projects/hp3300backend
* Update backends
- Combine all the Fujitsu backends into one single backend
* All backends should check for TL_X < BR_X and TL_Y < BR_Y to
avoid segfaults or even scanner damage. This should NOT be done
in sane_control_option, it should be possible to temporary set
TL_X > BR_X or TL_ > BR, otherwise it is hard for a frontend to
set the correct values.
* Use DBG(...) instead of fprintf(stderr, ...) or printf
- microtek
* 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
- figure out how/if to support bulb mode
- convert to use sanei_pio functions instead of direct port
access.
- The result of locking isn't checked --> does it make sense at all?
* dll: Rewrite to use libtool ltdl library
* dc210, dc240, gphoto2, and jpeg stuff: move sanei_* functions to sanei/
(if they are necessary).
* v4l: Problems (crash) with more than one video card. It looks like
the two different cards are identified as the same card.
* Fix backends where sane_exit() does not release memory allocated by
sane_get_devices().
- abaton
- agfafocus
- apple
- as6e
- avision
- bh
- canon
- coolscan
- dmc
- m3096
- microtek
- qcam
- ricoh
- s9036
- sharp
- sp15c
- tamarack
- etc?
* as6e: attach: memory (dev + dev-sane.name) isn't freed if driver isn't
found.
* avision: line 1393: word isn't freed sometimes (maybe if cp == line?)
* net: add IPv6 support.
* Fix warnings about DBG calls:
- avision
- m3096g
- plustek
- sm3600
- umax
- umax1220u
- v4l
doc
---
* Add doxygen documentation for the remaining sanei files:
- sanei_pa4s2.h
- sanei_pio.h
- sanei_pv8630.h
- sanei_scsi.h
- sanei_wire.h
* sane.tex: Define the return values for sane_init? Define the
consequences if sane_init doesn't return SANE_STATUS_GOOD.
* sane.tex: Add a warning/explanation about problems with
sane_get_select_fd, Unix select() calls and sane_cancel.
* sane.tex: Add new sane.type = "film scanner". Check the other well known
strings for completeness.
* sane-backends.html should state more clearly which backends are included
in the distribution.
frontends
---------
* saned:
- saned times out after 60 minutes. Check if the
watchdog timer is really necessary (e.g. to avoid blocking scanners
by one user). Maybe add a command line option to saned to set the
timeout. Otherwise turn on TCP keep alive (where available) and
(maybe) check the connection from server side.
- Add IPv6 support.
* scanimage: Add i18n (NLS) support?
[the remaining entries have been moved to the sane-frontends package]
sanei
-----
* sanei_scsi: Think about a completely new interface. Details are in
http://www.mostang.com/pipermail/sane-devel/2002-January/001995.html .
* create sanei_parport_* and remove all inb, outb,... from all backends;
use libieee1284 if available (see
http://people.redhat.com/twaugh/libieee1284/). Or just include this
library into sane.
* Check if the device file has the right type before accessing it. E.g.
check for major/minor numbers to avoid accessing a USB file as SCSI
device. This is finished for sanei_scsi.c/Linux. Patches for other
platforms are welcome.
platform-specific
-----------------
* Keep config.guess and config.sub up-to-date.
* SCSI access doesn't seem to work on Linux/Sparc. See emails from
Tomislav Renic on sane-devel (2001-09-21).
* Really fix all the parport/inb/outb compilation issues which break
porting to some non-i386 platforms.
* Add AC_OBJEXT and AC_EXEEXT to configure.in for automatically adding
the correct extensions (e.g. for OS/2). Also update the Makefiles
accordingly.
* Add support for semaphores also for OS/2 (currently used in snapscan).
* Fix shared lib problem with NetBSD. Starting scanimage results in:
"Cannot open "../backend/.libs/libsane.so". However, scanadf works.
* Check if a new version of libtool can fix the above mentioned issues.
misc
----
* sane-config: add options "--exec-prefix=...." and "--prefix=..."
compareable to gtk-config
* Check include/sane/config.h.in for unnecessary macros.
* Add configure option to enable only the net backend for users without
local scanners. Install only sane-dll/sane-net (or even only sane-net).
Maybe something like --network-client-only or --disable-local-devices.
* Make output of sane-find-scanner more flexible. See scanimage -f for
details.
******** done ********
* make distclean should remove *.orig, *.old, .#*, *.tar.gz, and similar
files.
* Shared libs work with OpenBSD. However, they are named libsane.so.1.6
instead of 1.0.6. Is this correct?
* #include "../include/sane/config.h" should be the first include in every
file (see doc/sane-backend-writing.txt for the lalloca exception):
* Don't use -ansi for HPUX (see sane-devel).
* Don't use exit() in backends.
* sanei_scsi: Check return values of req_wait and cmd in case of
SCSI DEVICE BUSY. Better specification of the behaviour of sanei_scsi
functions (e.g. return values, timeout 10 min versus 1 min)?
* Documentation for sanei API
* Fix missing or wrong links to backend homepages (*.desc). If a homepage
doesn't exist, add a contact address (where available).
* Check all backends which use fork/kill for the kill (-1,...) bug
first found in the microtek2 backend.
* Add support for qt NLS (msg2qm) if possible without too much hassle.
* Add new backend primax http://primax.sourceforge.net/ (won't be ever a
real sane backend)
* qcam: Check file handling in /tmp.
* 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?
* Add installation procedure for translations of SANE backend's options.
* check memory leaks (checked with purify and mtrace (from glibc)):
* 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
(start saned by inetd or saned -d before testing)
xscanimage / gimp with xscanimage plugin (where available)
All the above with shared and static libraries.->backend-writing.txt
* Remove compiler warnings (>300 warnings even in disable-warnings mode,
>700 with --enable-warnings)) ->backend-writing.txt
* Use #include "../include/sane/..." instead of #include <sane...>
->backend-writing.txt
* Use #include "../include/lalloca.h" instead of #include <lalloca.h>
->backend-writing.txt
* Update backend manpages (->backend-writing.txt).
* Add description of --enable-parport-directio.
* saned: Add documentation about the data connection.
* UMAX Astra 1220U backend
http://umax1220u-sane.sourceforge.net/
* There seems to be yet another race condition or other source for
freezes in saned or net. Wheile scanning with pnm and auth, scanimage
freezes. Last message from saned: "process_request: got request 2".
* Split configure option --enable-directio into --enable-scsi-directio and
--enable-parport-directio to avoid confusion. Also add appropriate
documentation.
* sanei_usb: Add sanei_usb_control_msg.
* Add support for PV8630 USB chipset (as sanei interface):
* Fix libsocket problem (OS/2). libsocket must be linked when testing for
libsyslog.
* Add bearpaw backend (Mustek BearPaw 1200 + maybe 2400)
(will be supported by plustek backend)
* Must -ldl be added to sane-config.in?
* Use @LIBDIR@, @CONFIGDIR@ and the other @@ macros to refer to paths.
These are updated when installing to a non-standard prefix.
* net: cancel doesn't work over the net at least with pnm and mustek.
* add Jochen Eisinger's net.c and sanei_wire.c fixes/additions.
* net.c: don't just ignore the byte-order for the image data (needed to
support depths > 8 bits/channel)
- mustek: for 3-pass scanners, it is said that xscanimage doesn't update
the scan progress bar properly between scans; it is said to stop at
90%, start the next pass, and once the next pass has started, it moves
on to 100% and the progress bar disappears at that point
- man pages for xcam, and the API functions
- xscanimage: provide both scale and textentry for ranges (make new widget)
- xcam: provide access to option doc strings and allow disabling of
advanced options and tooltips
- xscanimage: scanning of images whose heights is not known a priori is not
supported yet; this is going to be important for handheld scanners
- 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
- 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: make it robust against against it being listed in the configuration
* saned seems to have problems checking the peer name of incoming
connections. This happens at least with glibc 2.2.4 if the
name in saned.conf is not fully qualified. See sane-devel
"saned.conf hostname format".
* If you mention sane-devel, also mention the website concerning
subscription (http://www.mostang.com/sane/mail.html), because you can't
write to sane-devel without subscribing.
Or use your own mail address in the manual page.
* Check for logical errors and spelling
* Check .desc files:
* Check for formatting bugs in manual pages:
* Use #include "../include/assert.h" instead of #include <assert.h> to
avoid problem with shared libraries on AIX.
* scanimage: Maybe add ADF extensions from Caskey Dickson (or add them to
scanadf if necessary).
* Add Mustek USB backend (1200UB, 1200CU, 1200CU Plus)
http://www.meier-geinitz.de/sane/
Henning Meier-Geinitz <henning@meier-geinitz.de>
* Add USB support for sane-find-scanner.
* move .desc files for backends that are not included in SANE to
different directory (e.g. backends and external-backends)?
* create sanei_usb.* (maybe containing access for libusb and direct access
for usb device files)? (sane-1.0.6)
* Add sane-usb manpage
* Check net/saned
- sometimes saned+net freezes right after a scan (is this still
occuring 2001-06-04?)
* add warning when prefix dir is not listed in /etc/ld.so.conf on
linux systems may be there is a general way to test this if the
destination library directory is in the search path of the
linker. [The correct fix is to use -R (on Solaris) and -rpath
(on the rest?) to include the dynamic link path in the binaries
/ libraries. pere 2001-02-09 -- I believe this is partly fixed
in tools/sane-config.in 2001-05-18]
* Add links to sane(7) in all maual pages
* Check AIX/gcc shared lib loading problem: When starting scanimage,
only dll is loaded.
Backend libraries can't be loaded:
[dll] load: dlopen() failed (Symbol resolution failed for
/tmp/sane-bin/lib/sane/libsane-umax.so.1 because:
Symbol __eprintf (number 55) is not exported from dependent
module scanimage.
This happens in most libraries. The reason is assert() e.g. in
sanei_scsci.c. As assert() is in libgcc.a it can't be linked at runtime.
* Don't export any other symbols than sane_* and sanei_*
* nec:
- Remove references to sharp backend (grep for "JX").
- Check for HAVE_SYS_SHM_H before including sys/shm.h and
disable shared memory support if necessary.
* lines like "if (config_line[len - 1] == '\n')" can cause segfaults and
should be removed (removing "\n" is already done in sanei_config_read).
This ist just a fast grep. Check all backends!
* add additions/bug fixes to microtek2 from Karsten Festag
<karsten.festag@t-online.de> (partially done)
* include snapscan updates http://sourceforge.net/projects/snapscan
* as6e: change :new status to :alpha, :beta, or :stable.
* Check Tru64 Unix compilation problems with u_int* types. They are already
defined in sys/bitypes.h but this file isn't checked with AC_CHECK_TYPE.
(-> include sys/bitypes.h in these cases).
* Fix HP-UX problems in isfdtype.c (and maybe others). sys/stat.h doesn't
seem to define stuct stat (not a bug, make was used instead of gmake).
* Polaroid SprintScan 35 LE [should be included into microtek]
* Maybe add script to deinstall existing sane versions
- make uninstall
- install sane-uninstall script. Advantage: uninstall possible
without sourcecode (I think that's not necessary because you usually
have the sourcecode of a newer version if you want to uninstall. hmg)
* Add sane manpage (this is work in progress: Henning Meier-Geinitz
<henning@meier-geinitz.de>)
- versioning system?
- SANE API (maybe summary only?)
- point to backends and other information?
* Add backend UMAX 1220P/2000P & HP 320C http://umax1220p.sourceforge.net
* install all documentation that's available
* Add a check for installed sane versions.
- Print a warning when already a sane version is installed
- If SANE is installed at a different location, ask user to
remove old installation first
* epson: backend tries to detect usb scanners by default. This breaks with
non-epson scanners like the LM9831 bases Mustek Bearpaw 1200. The epson
backend freezes if such a scanner is plugged in. Try to make the test safe
or don't test without user interaction.
* pnm: add more options for testing (e.g. arrays and read-only options)
* sanei_scsi.c: OS/2: struct param breaks compilation with --enable-warnings.
(probably fixed by testing for os2.h in configure).
* Check all manpages for references to find-scanner (->sane-find-scanner).
* net.c doesn't compile on Irix because socklen_t isn't known
* Add new backends: bh http://www.martoneconsulting.com/sane-bh.html
* Add manpage for find-scanner.
* Should find-scanner be installed?
* net backend segfaults sometimes when connected to localhost. Enabling
debug output sometimes prevents segfaults. Cause of the problem:
Copying SANE_TYPE_STRINGs up to their maximum size in
SANE_Option_Descriptor (strings may be shorter then size).
* Compilation of most backends break with OS/2 and gcc because the
option -ansi doesn't seem to like sigset_t ?
* Check for shm.h in configure
* Add a global PATH_MAX macro somewhere (config.h ?) if it's not defined
by the system.
* sanei_scsi.c: Add patch from FreeBSD ports (sanei_scsi_find_devices)
(after 1.0.4).
* update libtool versioning system
- in /usr/local/lib/libsane.la "installed=no" is set, isn't
"installed=yes" the correct entry?
* plustek-share.h: remove //
* as6e: Check result of stat for errors to avoid false recognitions of the
as6edriver.
* artec: O_SYNC is not Posix. Breaks compilation on FreeBSD and (maybe) OS/2.
* use strchr() instead of index() in mustek_pp to avoid problems when
icluding strings.h or string.h.
* Add test for PTAL to acinclude.m4/configure.in
* build on Irix fails because of problems with the jpeg library. If this
is removed in configure, build works. It complains about functions like
(typename) functionname (). It doesn't like the brackets which result
from expanding the macros EXTERN(x), METHODDEF(x), and GLOBAL(x) to
(x). Defining something like EXTERN(x) x seems to work. Same for dc210.c
Something like --disable-jpeg for configure would be nice.
* addition to hp backend (support for SCL-based HP OfficeJets)
http://hpoj.sourceforge.net
* Libtool:
- -version-info is used but with the current version number system
-release should be used. (We should not change the version syntax
within an existing sane-standard, so we leave this)
- look for AIX problems (overwriting shared libs with eachother
because all libs are named libsane.so.1) (solved)
- look for Irix/cc problems (program searches for libsane.so.2 instead
of libsane.so.1). (Patch works for existing sane standard)
* getopt.c and umax.c seem to use gettext? Can cause crash if frontends
are linked to libintl, too.
* libdl is used in dll backend but -ldl is not added to LDFLAGS?
* use strchr() instead of index() in sanei_auth, scanimage, saned
to avoid problems when icluding strings.h or string.h.
* Remove frontends (at least xscanimage/xcam) from distribution.
* build on AIX does only work for static libraries. The shared libraries
seem to overwrite each other.
* add sanei_authorize (function for all backends)
* make authorization_callback work in net-backend and saned. Try to
avoid plain text passwords?
* Add as6e http://as6edriver.sourceforge.net/
* stiff.c: Tiff header not written correctly: "Jaeger, Gerhard"
<gjaeger@sysgo.de> writes: When writing the TIFF header, you have to
specify the TAG "BitsPerSample", which tells a reader how many bits each
sample has. The current version only specifies one value (8 or 16). This
is wrong, as we have to specify one value for each channel (i.e for a
24bit RGB pic we must specify 8,8,8, see TIFF6.0 spec, [...]
* don't install sanei_* headers
* Add sane-pie (Pacific Image Electronics series of ScanAce SCSI scanners, and
the Devcom 9636/9630 BlackWidow) http://www.munton.demon.co.uk/sane
* configure --without-x doesn't work (doesn't matter when frontends
are removed from package)
* Create new package for frontends.
* 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)
- PREVIEW: maybe there should be an option to limit the preview
* 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:
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