TODO (2002-04-13) ******** todo ******** backends -------- * Add new backends (+ means: scheduled for version 1.0.8, (+) means: still maintained and/or updates will come) (+)hp4200 http://hp4200-backend.sourceforge.net/ (+)Relisys Scorpio Super 3 SCSI II Mark Plowman http://www.xs4all.nl/~plowman/ (+)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 http://www.remote.org/frederik/projects/software/sane/ (+)Hewlett-Packard ScanJet 3300C / 3400C and 4300C (wip) http://sourceforge.net/projects/hp3300backend * Update backends + Canon FB620S flatbed scanner and FS2710 film scanner support (update for canon backend). ftp://stthd0.pc.uni-koeln.de/pub/canon-1.08.tar.gz Ulrich Deiters * 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 - Check what happens when calling sane_init/sane_open and sane_exit more than once. * 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 - sm3600 - umax1220u - v4l * Make all symbols that don't start with sane_ or sanei_ static (see make libcheck): - artec: cap_data - avision: Avision_Device_List - canon: option_name - sm3600: aidProduct doc --- * Add doxygen documentation for the remaining sanei files: - sanei_pio.h - sanei_pv8630.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. - Add a warning/explanation about problems with sane_get_select_fd, Unix select() calls and sane_cancel. - Add some text about the meaning of bits in 1-bit modes. - Define, how to handle SANE_CAP_ADVANCED for groups. * sane-backends.html should be sorted by manufacturer, not by backend. (wip by Henning Meier-Geinitz). 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. * sanei_scsi (Linux): Make sure that the SCSI driver is loaded when checking for scanners. Ideas: Open/close all the /dev/sg* files in sanei_scsi.c, dll.c or in a new backend. platform-specific ----------------- * 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). * The plustek backend doesn't compile on OS/2 because in plustek-usbhw.c itimerval is unknown. 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. * Check licence issues with getopt*.c and md5.c. These files are GPLed, so if they are used in backends, their SANE exception will be void. * Can we link external libraries only to backends that need them? * Add support to sane-find-scanner to check whole directories for device files. * Fix inclusion of saneopts.??.po in po/. Currently, the "" header is defined twice. ******** done ******** * Add backends (no response from author and unchanged for some time) - Linux Handscanner Ioctl Interface scanner by Harald Bauer - viceo (Visioneer OneTouch 8600) http://www.littlecms.com/iphoto/otlinux.htm - v4l2 http://video.inodes.org/sane-v4l2/ * 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. Currently (2002-03-17) the CVS version of libtool works on NetBSD but breaks AIX-4. * Combine all the Fujitsu backends into one single backend * sane-backends.html should state more clearly which backends are included in the distribution. Solution: Split into two lists. * Keep config.guess and config.sub up-to-date. * sane.tex: Add new sane.type = "film scanner". Check the other well known strings for completeness. * 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 ->backend-writing.txt * Use #include "../include/lalloca.h" instead of #include ->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) * 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 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 * 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 (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 ) - 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" 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) * 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 * 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