***************************************************************************

  Unified Gutenprint/CUPS backend for various Dye-Sublimation photo printers

  Copyright (c) 2007-2020 Solomon Peachy <pizza@shaftnet.org>

  This free software comes with ABSOLUTELY NO WARRANTY and is licensed under
   the GNU GPL (v3 or later); see the 'COPYING' file for more details.

  SPDX-License-Identifier: GPL-3.0+

  The latest version can be found at

    http://git.shaftnet.org/cgit/selphy_print.git

  For a list of known bugs and development plans, see:

    http://bugs.shaftnet.org/index.php?project=4

 ***************************************************************************

  If you do not have one of the printers listed below, this backend is
  not relevant for you and you can just ignore all of this.

  Supported Printers:

   Canon SELPHY ES series
   Canon SELPHY CP series
   Ciaat Brava 21
   Citizen CW-01
   Citizen CW-02 / OP900II
   DNP DS40 / Citizen CX
   DNP DS80 / Citizen CX-W
   DNP DS80DX
   DNP DS-RX1 / DS-RX1HS / Citizen CY / CY-02
   DNP DS620 / DS620A / Citizen CX-02
   DNP DS820 / DS820A / Citizen CX-02W
   DNP QW410 / Citizen CZ-01
   Fujifilm ASK-300
   HiTi P520L
   HiTi P525L
   Kodak Professional 1400
   Kodak 305 Photo Printer
   Kodak 605 Photo Printer
   Kodak 805 Photo Printer
   Kodak 6800 Photo Printer
   Kodak 6850 Photo Printer
   Kodak 7000 Photo Printer
   Kodak 8810 Photo Printer
   Magicard Tango 2E
   Mitsubishi CP-3800DW
   Mitsubishi CP-9550D/DW/DW-S/DZ/DZ-S
   Mitsubishi CP-9600D/DW
   Mitsubishi CP-D70DW and CP-D707DW
   Mitsubishi CP-D70DW-S and CP-D707DW-S
   Mitsubishi CP-D80DW
   Mitsubishi CP-D90DW
   Mitsubishi CP-K60DW-S
   Mitsubishi CP-M1A / CP-M1E
   Mitsubishi P95DW
   Mitsubishi P93DW
   Shinko CHC-S1245 (aka Sinfonia E1 and DNP Q8)
   Shinko CHC-S2145 (aka Sinfonia S2)
   Shinko CHC-S6145 (aka Sinfonia CS2)
   Sony UP-CR10L (aka DNP DS-SL10)
   Sony UP-DR80MD
   Sony UP-DR150
   Sony UP-DR200
   Sony UP-D895
   Sony UP-D897
   Stryker SDP1000

  Work-in-progress Printers:

   DNP M4 / Q4
   DNP M8
   HiTi P110 series
   HiTi P510 series
   HiTi M610 (not X610!)
   HiTi P720L
   HiTi P750L
   HiTi P910L
   HiTi CS-200e
   HiTi CS-220e
   ICI Imagedata OP900
   Kodak 6900
   Kodak 7010 / 7015
   Magicard Rio 2E (and other Magicard models)
   Mitsubishi CP30DW
   Mitsubishi CP3020D/DE and CP3020DA/DAE
   Mitsubishi CP9000DW, CP9500DW, and CP9600DW-S
   Mitsubishi CP9800DW, CP9800DW-S, CP9810DW, and CP9820DW-S
   Mitsubishi CP-M15
   Olmec OP900
   Shinko CHC-S2245 (aka Sinfonia S3)
   Shinko CHC-S6145-5A (aka Sinfonia CS2-c)
   Shinko CHC-S6245 (aka Sinfonia CE1)
   Sony UP-CR20L (aka DNP DS-SL20)
   Sony UP-D898 series
   Sony UP-DR80

 ***************************************************************************

  This intelligent backend is needed to utilize many common dye-sublimation
  photo printers under Linux, OSX, and other UNIX-like operating systems.

  Although these printers advertise themselves as standard USB Printer Class
  devices, they do not actually obey those specifications and require
  special two-way handshaking in order to successfully print.

  This backend can only be used in conjunction with Gutenprint 5.2.10 or
  newer. Please see the Gutenprint README file (section II D) for more
  information on use of this backend and integration into CUPS.

  While this repository is considered the canonical upstream source for
  this code, code snapshots are bundled with each Gutenprint release.
  Generally speaking, the code in this repository will require the current
  Gutenprint release (or pre-release) to generate the actual print jobs.

  As such, when compared to any given Gutenprint release, the code found
  here is usually newer, with additional features, device support, and
  bugfixes.  At the same time, it may have half-developed features that
  don't quite work, with giant bugs that come out at midnight to eat
  your cat.

  With few exceptions, all printer support in selphy_print (and Gutenprint)
  was developed without any assistance from the printer manufactuers,
  relying on reverse-engineering and a great deal of experimentation.

  On that note, please keep in mind that this software distributed
  in the hope that it will be useful, but WITHOUT ANY WARRANTY WHATSOEVER.

 ***************************************************************************

  This backend also supports a "standalone" mode that performs various
  utility functions for most models, such as querying status and
  configuring parameters. The exact commands supported for each
  printer are documented below.

 ***************************************************************************
  Compilation:

     This tool requires libusb 1.0 to build.  We highly recommend
     v1.0.16 or newer due to general stability improvements. Versions
     older than 1.0.10 will require -DLIBUSB_PRE_1_0_10 to be defined
     (see the Makefile).

     To further complicate things, libusb-1.0 had a temporary fork called
     libusbx, but that was merged back into libusb as of v1.0.18.
     Consequently, your distribution package for libusb-1.0 may be
     called libusbx instead.

     Additionally, you will need the CUPS development packages installed,
     so we can figure out how the local CUPS instance is configured.

     Lastly, in order to integrate the backend into an existing Gutenprint
     installation you will need to install the Gutenprint development
     headers.

     Fedora/RedHat:
	yum install libusbx-devel libusb1-devel cups-devel gutenprint-devel
     Debian/Ubuntu
	apt-get install libusbx-dev libusb-1.0-0-dev libcups2-dev libgutenprint-dev

     All you need to do after that is type 'make'

  Compilation for Windows:

     This is highly experimental.

     Currently only MinGW is supported.  You will need the 'libltdl' and
     'libusbx' MinGW packages.

     Once the necessary packages are installed, run 'mingw64-make' and
     everything should compile cleanly.

     Please note that actually running this under Windows will require
     use/installation of a generic USB driver such as WINUSB.  For more
      information, see:

	http://zadig.akeo.ie

     Another note.  If you are using a NEC/Renesas USB 3.0 host
     controller, you will need to ensure that it is using up-to-date
     drivers or no devices will enumerate.  For more information, see:

        https://github.com/libusb/libusb/wiki/Windows

 ***************************************************************************
  CUPS backend usage:

   DEVICE_URI=someuri \
       gutenprint52+usb job-id user title num-copies options [ filename ]

    The backend generates output for CUPS to parse, including logging
    print counts, reporting loaded media types, and remaining media counts.

    Please note that this backend merely handles the low-level
    communication with the printer!  Actually generating print jobs requires
    use of Gutenprint compiled with support for CUPS.

   DEVICE_URI=someuri FINAL_CONTENT_TYPE=application/vnd.cups-command \
       gutenprint52+usb job-id user title num-copies options [ filename ]

    This parses a CUPS command file and performs actions listed in the file.

     Implemented commands:

       ReportLevels        Report the marker (ie media) type and levels.

     Other commands may be implemented in the future.  Individual printer
     models may not implement these commands.

  Other Notes:

    'someuri' is the URI returned by the backend when it probes for supported
    devices.  is invoked by calling the backend with no arguments.

    The backend supports multiple URI schemes.  First, the "modern" one:

     gutenprint53+usb://backendname/serialnum

    And the old/legacy/classic ones:

     gutenprint52+usb://manufacturer/model/?backend=backendname&serial=serialnum
     gutenprint52+usb://manufacturer/model/?serial=serialnum&backend=backendname

    The URI scheme generated at device probing depends on the version of
    gutenprint installed.  By default, the modern scheme is used when compiled
    against Gutenprint 5.3 or newer, and the legacy scheme is used with
    Gutenprint 5.2.

    Regardless of the scheme generated at probe time, the backend will continue
    to detect and parse both schemes indefinitely as to not break backwards
    compatibility with existing deployments.  To manually switch the URI
    scheme type generated at runtime, set the OLD_URI_SCHEME environment
    variable to either 0 or 1, as appropriate.

 ***************************************************************************
  Standalone usage:

    This backend is set up as a multi-call executable; that is to say
    behaivor changes based on the name used to invoke the executable.
    When compiled, a set of symlinks are created, corresponding to the generic
    name of each of the internal backends.  Alternatively you may set
    the BACKEND environment variable to force a specific backend to be used.
    These commands are equivalent:

         BACKEND=backend ./gutenprint52+usb [ arguments ]
	 ./backend [ arguments ]

    The 'backend' name is any one of the names listed when invoking the
    executable with no arguments.  For example:

       ./dnpds40
       DEBUG: Multi-Call Dye-sublimation CUPS Backend version 0.88
       [ ... ]
       DEBUG: Standalone DNP DS-series / Citizen C-series backend version 0.106
       DEBUG:   supporting: dnp_citizen dnpds40 dnpds80 dnpds80dx dnpds620 dnpds820 dnprx1 citizencw01 citizencw02 citizencx02
       [ ... ]

     The first entry after 'supporting' is the generic backend name, while
     the others correspond to specific models the backend supports.  Any one
     can be used as the 'backend' name.

     All backends support the following invocations:

        backend [ arguments ]
	backend [ arguments ] filename
	backend [ arguments ] - < filename
	somecommand | backend [ arguments ] -

      The 'filename' here refers to the raw spool data generated by
      Gutenprint (eg via its gimp plugin) or the Windows print-to-file
      output.

      All global arguments:

	   -D                 Increment debug level                      [1]
	   -G                 Display GPL text
	   -f                 Enable fast return mode if possible        [2]
	   -d numcopies       Print 'numcopies' of the supplied job
	   -v                 Silence all output except for warnings/errors

       [1]  This argument can be repeated to increase the debug level.
            Alternatively, the 'DYESUB_DEBUG' environment variable can be
	    used.  For example, '-DDD' and 'DYESUB_DEBUG=3' are equivalent.

		DYESUB_DEBUG=1		Enable debug output
		DYESUB_DEBUG=2		Dump contents of short messges
		DYESUB_DEBUG=3		Dump contents of all messages

       [2]  This terminates the backend as soon as the printer has
	    accepted the print job, without waiting for the print job
	    to complete.  Not all printers support this feature. This
	    can also be enabled by setting the 'FAST_RETURN' environment
	    variable.  This is the default behavior when using this backend
	    with CUPS.

      Finally, some backends support additional arguments; see their details
      below.

 ***************************************************************************
  Other Environment Variables:

      If you have multiple models of the same printer family connected
      simultaneously, the backend will choose the first one it finds.
      If you wish to target a specific device, you may specify its
      serial number using the 'SERIAL' environment variable. For example:

            SERIAL=N782 backend filename [ arguments ]

       All backends support an additional operational mode, to test out
       unknown models. To use this mode, specify the VID, PID and its
       internal device type as environment variables:

            EXTRA_VID=04a9 EXTRA_PID=3ab1 EXTRA_TYPE=7 backend filename

       The VID and PID are specified in hexidecimal, and the TYPE is
       the P_XXX enumeration defined in backend_common.h. The '7' in this
       example corresponds to most Canon SELPHY CP models, and is what you
       would use if you were trying to get the backend to detect an
       otherwise unrecognized SELPHY CP model.

       If you are able to successfuly print using this technique,
       please let us know so we can add the apppriate entry to the
       internal database.

       For debugging USB operation, there following environment variables
       can be set:

           MAX_XFER_SIZE     Maximum transfer size, in bytes.
	   XFER_TIMEOUT      Timeout, in milliseconds, for all USB operations

         for example:

           MAX_XFER_SIZE=32768 XFER_TIMEOUT=30000 backend filename

       To change the location of backend data at runtime, set CORRTABLE_PATH
       to the appropriate directory.

       Finally, BACKEND_QUIET can be set to a non-zero value to silence all
       output other than warnings and errors.

 ***************************************************************************
  Standalone status queries:

    If you just want to query the printer and media status in a
    printer-independent manner, the backend supports reporting a standard
    set of data in either textual or JSON format.  This is used with the
    BACKEND_STATS_ONLY environment variable:

      BACKEND_STATS_ONLY=? BACKEND=backend [SERIAL=??] ./gutenprint53+usb
      BACKEND_STATS_ONLY=? [SERIAL=??] ./backend

    BACKEND_STATS_ONLY=1 will report in textual format, for example:

	Backend: HiTi Photo Printers
	Version: 0.100 / 0.16
	Timestamp: 2019-1 2-13 14:54:28
	Manufacturer: HiTi
	Model: HiTi:Usb Photo Printer:HiTi P520L
	Serial Number: 2WC4A1013968279
	Firmware Version: 1.21.0.i
	Printer Status: Idle
	Lifetime Prints: 194
	Media 0 Type: 4x6
	Media 0 Level: 313 / 500

    BACKEND_STATS_ONLY=2 will report in JSON format, for example:

     {
        "backend": "HiTi Photo Printers",
        "version": "0.100 / 0.16",
        "timestamp": "2019-12-13 14:57:38",
        "manufacturer": "HiTi",
        "model": "HiTi:Usb Photo Printer:HiTi P520L",
        "serial": "2WC4A1013968279",
        "firmware": "1.21.0.i",
        "status": "Idle",
        "counters": {
                "lifetime": 194
        },
        "media": [
                {
                        "type": "4x6",
                        "level": "OK",
                        "levelnow": 313,
                        "levelmax": 500
                }
        ]
     }

 ***************************************************************************
  BACKEND=canonselphy

   Model IDs recognized:

     canon-cp10 canon-cp100 canon-cp200 canon-cp220 canon-cp300 canon-cp330
     canon-cp400 canon-cp500 canon-cp510 canon-cp520 canon-cp530 canon-cp600
     canon-cp710 canon-cp720 canon-cp730 canon-cp740 canon-cp750 canon-cp760
     canon-cp770 canon-cp780 canon-cp790 canon-cp800 canon-cp810 canon-cp900
     canon-es1 canon-es2 canon-es20 canon-es3 canon-es30 canon-es40

   Model IDs for backwards compatibility with older releases:

     selphycp10 selphycp100 selphycp200 selphycp220 selphycp300 selphycp330
     selphycp400 selphycp500 selphycp510 selphycp520 selphycp530 selphycp600
     selphycp710 selphycp720 selphycp730 selphycp740 selphycp750 selphycp760
     selphycp770 selphycp780 selphycp790 selphycp800 selphycp810 selphycp900
     selphyes1 selphyes2 selphyes20 selphyes3 selphyes30 selphyes40

   Verified supported printers:

     ES1, ES2, ES3, ES30, ES40, CP-10, CP-100, CP-200, CP-300, CP-330,
     CP400, CP500, CP510, CP710, CP720, CP730, CP740, CP750, CP760, CP770,
     CP780, CP790, CP800, CP900

   Unverified/untested, but should work:  (let us know, please!)

     ES20, CP-220, CP520, CP530, CP600, CP810

   Valid commands:

     -R                 Reset printer to factory defaults
     -s                 Query printer status

   Notes:

     * The SELPHY ES3 and ES30 cannot report the loaded media type
     * All models can report media empty, but not quantity remaining

 ***************************************************************************
  BACKEND=canonselphyneo

   Model IDs recognized:

     canon-cp820 canon-cp910 canon-cp1000 canon-cp1200 canon-cp1300

   Model IDs for backwards compatibility with older releases:

     selphycp820 selphycp910 selphycp1000 selphycp1200 selphycp1300

   Verified supported printers:

     CP1000, CP1200, CP1300

   Untested, but expected to work:

     CP820, CP910

   Valid commands:

     -R                 Reset printer to factory defaults
     -s                 Query printer status

  Notes:

     * All models can report media empty, but not quantity remaining

 ***************************************************************************
  BACKEND=kodak1400

   Additional model IDs recognized:

     kodak-1400 kodak-805
     mitsubishi-3020d mitsubishi-3020da, mitsubishi-3020dae mitsubishi-3020de
     mitsubishi-3020du

   Model IDs for backwards compatibility with older releases:

     kodak1400 kodak805 mitsu3020d mitsu3020da

   Verified supported printers:

     Kodak 1400
     Kodak 805

   Work-in-progress printers:

     Mitsubishi CP3020D/DE
     Mitsubishi CP3020DA/DAE

   Valid commands:

     -C filename        Set tone curve [1]

  Notes:

    * These models cannot report media type or remaining levels,
      but are able to report out of media conditions.

    [1] Format of curvedata file:

	256 entries each of Yellow, Magenta, Cyan mappings:
	Values are unsigned 16-bit big endian, between 0 and ???
	(unsure as to the bit usage)

 ***************************************************************************
  BACKEND=kodak68x0

   Model IDs recognized:

     kodak-6800 kodak-6850

   Model IDs for backwards compatibility with older releases:

      kodak6800 kodak6850

   Verified supported printers:

     Kodak 6800
     Kodak 6850

   Development was sponsored in part by:

        LiveLink Technology [ www.livelinktechnology.net ]

   Valid commands:

     -c filename        Query tone curve [1]
     -C filename        Set tone curve   [1]
     -l filename        Query Current tone curve from RAM [1]
     -L filename        Store Current tone curve in RAM   [1]
     -m                 Query media information
     -s                 Query printer status
     -R                 Reset printer to factory defaults
     -X id              Cancel print job 'id' [2]

  Notes:

    [1] Format of curvedata file:

	256 entries each of Yellow, Magenta, Cyan mappings:
	Values are unsigned 16-bit big endian, between 0 and 16383
	(ie 14-bit)

    [2] Job ID is the Internal Job ID (reported via status)
	 This cancels a multi-copy print job.
	 To see which jobs are active/pending, see the output of the
	 '-s' command, specifically the 'Bank' output.

 ***************************************************************************
  BACKEND=kodak605

   Additional model IDs recognized:

     kodak-605, kodak-7000, kodak-7010, kodak-7015,

   Verified supported printers:

     Kodak 605
     Kodak 7000

   Work-in-progress printers:

     Kodak 7010/7015

   Valid commands:

     -b [ 0 | 1 ]       Disable or Enable the printer control panel
     -c filename        Query User tone curve from flash        [1]
     -C filename        Store User tone curve in flash          [1]
     -e                 Query error log
     -F                 Flash printer LEDs for 5 seconds
     -i                 Query printer firmware information
     -l filename        Query Current tone curve from RAM       [1]
     -L filename        Store Current tone curve in RAM         [1]
     -m                 Query media information
     -r                 Reset User tone curve to default        [3]
     -R                 Reset printer to factory defaults
     -s                 Query printer status
     -X id              Cancel print job 'id' [2]

  Notes:

    [1] Format of curvedata file:

	256 entries each of Yellow, Magenta, Cyan mappings:
	Values are unsigned 16-bit big endian, between 0 and ???
	(unsure as to the bit usage)

    [2] Job ID is the Internal Job ID (reported via status)
	 This cancels a multi-copy print job.
	 To see which jobs are active/pending, see the output of the
	 '-s' command, specifically the 'Bank' output.

    [3] Default printer tone curve is a linear 'val << 3'

 ***************************************************************************
  BACKEND=shinkos2145

   Model IDs recognized:

     shinko-chcs2145 sinfonia-chcs2145

   Verified supported printers:

     Shinko CHC-S2145 (aka "Sinfonia S2")

   Development was sponsored in part by:

        LiveLink Technology [ www.livelinktechnology.net ]

   In order to use this backend, you will need to ensure the printer is
   configured to use the 'DRV' (as opposed to 'DLL') operating mode.  See
   the printer documentation for details on how to set this.

   Valid commands:

     -b [ 0 | 1 ]       Disable or Enable the printer control panel
     -c filename        Query User tone curve from flash        [1]
     -C filename        Store User tone curve in flash          [1]
     -e                 Query Error log
     -F                 Flash printer LEDs for 5 seconds
     -i                 Query printer firmware information
     -l filename        Query Current tone curve from RAM       [1]
     -L filename        Store Current tone curve in RAM         [1]
     -m                 Query media information
     -r                 Reset User tone curve to default        [4]
     -R                 Reset printer to factory defaults
     -s                 Query printer status
     -u                 Query user string
     -U somestring      Set user string to 'somestring'
     -X id              Cancel print job 'id'                    [3]

  Notes:

    [1] Format of curvedata file:

	256 entries each of Yellow, Magenta, Cyan mappings:
	Values are unsigned 16-bit big endian, between 0 and 2047
	(ie only 11 bits used)

    [3] Job ID is the Internal Job ID (reported via status)
	 This cancels a multi-copy print job.
	 To see which jobs are active/pending, see the output of the
	 '-s' command, specifically the 'Bank' output.

    [4] Default printer tone curve is a linear 'val << 3'

 ***************************************************************************
  BACKEND=shinkos1245

   Low-level documentation was provided by Sinfonia, Inc.  Thank you!

   Model IDs recognized:

     shinko-chcs1245 sinfonia-chcs1245

   Verified supported printers:

     Shinko CHC-S1245 (aka "Sinfonia E1")

   Unsupported printers (unknown VID/PID)

     DNP Q8

   Valid commands:

     -s                 Query printer status
     -m                 Query media information
     -u                 Query user string
     -U somestring      Set user string to 'somestring'
     -X id              Cancel print job 'id'                   [1]
     -R                 Reset printer to factory defaults
     -F                 Tone curve commands affect FINE table
     -c filename        Query User tone curve from flash        [2]
     -C filename        Store User tone curve in flash          [2]
     -l filename        Query Current tone curve from RAM       [2]
     -L filename        Store Current tone curve in RAM         [2]

  Notes:

    [1] Job ID is the Internal Job ID (reported via status)
	 This cancels a multi-copy print job.
	 To see which jobs are active/pending, see the output of the
	 '-s' command, specifically the 'Bank' output.

    [2] Format of tone curve file:

	256 entries each of Yellow, Magenta, Cyan mappings:
	Values are unsigned 16-bit big endian, between 0 and 16383
	(ie only 14 bits used)

***************************************************************************
  BACKEND=shinkos6145

   Low-level documentation was provided by Sinfonia and CIAAT.  Thank you!

   Model IDs recognized:

     sinfonia-chcs6145 ciaat-brava-21 shinko-chcs6145
     sinfonia-chcs2245 hiti-m610 kodak-6900

   Model IDs for backwards compatibility with older releases:

     shinks6145 brava21

   Verified supported printers:

     Ciaat Brava 21
     Shinko CHC-S6145 (aka "Sinfonia CS2")

   Work-in-progress printers:

     HiTi M610
     Kodak 6900
     Sinfonia CHC-S2245 (aka "S3")

   *** VERY IMPORTANT ***

     In order to generate usable output, the Sinfonia CHC-S6145 and CHC-S2245
     printers (and their siblings listed above) require the input data to be
     transformed using specific image processing algorithms.

     The library that implements this processing is dynamically loaded
     at runtime. There are three options:

       * libS6145ImageProcess and S2245IP -- Supported by Sinfonia, these
         are proprietary libraries.  They can be obtained by politely
	 contacting your local Sinfonia distributor.

         If you have the appropriate permission fron Sinfonia and their
	 technical and legal limitations are acceptible to you, we
	 recommend you use these official supported libraries.

       * libS6145ImageReProcess and libS2245ImageReProocess -- GPL'd
         re-implementations of the Sinfonia algorithms, available as
         source.  They are drop-in replacement that appears to generate
         identical output to the proprietary Sinfonia libraries.

	 DISCLAIMER: Sinfonia Inc was not involved in the creation of
	 these libraries and is not responsible in any way for any
	 deficiencies in its output. They will provide no support if it is
	 used.

         Do *NOT* contact Sinfonia for support if you are using
	 libS6146ImageReProcess or libS2245ImageReProcess!

	    (Please see the full disclaimer in libS6145ImageReProcess.c and
             libS2245ImageReProcess.c)

     As selphy_print is released under the terms of the GPL, it cannot
     normally be combined with proprietary libraries.

     Therefore, the authors of selphy_print grant its users an
     additional permission (under section 7 of the GPLv3) to combine
     and/or redistribute it with the proprietart libS6145ImageProcess
     and/or S2245IP libraries. For the full text of this license
     exception, please see the header of backend_shinkos6145.c

   Valid commands:

     -c filename        Query User tone curve from flash        [1]
     -C filename        Store User tone curve in flash          [1]
     -e                 Query Error log
     -F                 Flash printer LEDs for 5 seconds
     -i                 Query printer firmware information
     -k num		Specify standby delay (5-240 minutes)
     -l filename        Query Current tone curve from RAM       [1]
     -L filename        Store Current tone curve in RAM         [1]
     -m                 Query media information
     -q filename        Dump eeprom data                        [4]
     -Q filename        Dump image correction data              [4]
     -r                 Reset User tone curve to default        [3]
     -R                 Reset printer to factory defaults
     -s                 Query printer status
     -X id              Cancel print job 'id'                   [2]

  Notes:

    [1] Format of curvedata file:

	256 entries each of Yellow, Magenta, Cyan mappings:
	Values are unsigned 16-bit big endian, between 0 and 2047
	(ie only 11 bits used)

    [2] Job ID is the Internal Job ID (reported via status)
	 This cancels a multi-copy print job.
	 To see which jobs are active/pending, see the output of the
	 '-s' command, specifically the 'Bank' output.

    [3] Default printer tone curve is a linear 'val << 3'

    [4] This is used as an input to the image processing code, and is
        only useful for debugging purposes.

***************************************************************************
  BACKEND=shinkos6245

   Low-level documentation was provided by Sinfonia, Inc.  Thank you!

   Model IDs recognized:

     sinfonia-chcs6245 hiti-p910l shinko-chcs6245
     kodak-8810

   Model IDs for backwards compatibility with older releases:

     shinkos6245 hitip910

   Verified supported printers:

     Kodak 8810

   Work-in-process printers:

     HiTi P910L
     Shinko CHC-S6245 (aka "Sinfonia CE1")

   Valid commands:

     -b [ 0 | 1 ]       Disable or Enable the printer control panel [4]
     -c filename        Query User tone curve from flash        [1]
     -C filename        Store User tone curve in flash          [1]
     -e                 Query Error log
     -F                 Flash printer LEDs for 5 seconds
     -i                 Query printer firmware information
     -k num		Specify standby delay (5-240 minutes)
     -l filename        Query Current tone curve from RAM       [1]
     -L filename        Store Current tone curve in RAM         [1]
     -m                 Query media information
     -r                 Reset User tone curve to default        [3]
     -R                 Reset printer to factory defaults
     -s                 Query printer status
     -X id              Cancel print job 'id'                   [2]

  Notes:

    [1] Format of curvedata file:

	256 entries each of Yellow, Magenta, Cyan mappings:
	Values are unsigned 16-bit big endian, between 0 and 2047
	(ie only 11 bits used)

    [2] Job ID is the Internal Job ID (reported via status)
	 This cancels a multi-copy print job.
	 To see which jobs are active/pending, see the output of the
	 '-s' command, specifically the 'Bank' output.

    [3] Default printer tone curve is a linear 'val << 3'

    [4] Kodak 8810 only

 ***************************************************************************
  BACKEND=sonyupd

   Additional model IDs recognized:
     sony-updr150 sony-updr200 sony-upcr10l
     sony-upd895 sony-upd897 dnp-sl10

   Model IDs for backwards compatibility with older releases:

     sonyupdr150 sonyupdr200 sonyupcr10

   Verified supported printers:

    Sony UP-CR10L
    Sony UP-D895
    Sony UP-D897
    Sony UP-DR150
    Sony UP-DR200

  Unverified/untested, but should work:

    DNP DS-SL10

  Valid commands:

     -s                 Query printer status

  Notes:

    * These models cannot report media type or remaining levels,
      but are able to report out of media conditions.

 ***************************************************************************
  BACKEND=sonyupdneo

   Model IDs recognized:

     sony-upcr20l sony-upd898 sony-updr80 sony-updr80md dnp-sl20

  Verified supported printers:

    Sony UP-DR80MD
    Stryker SDP1000

  Work-in-progress printers

    Sony UP-DR80

  Work-in-progress printers (Lack USB PIDs)

    Sony UP-D898 / UP-X898
    Sony UP-CR20L
    DNP DS-SL20

  Valid commands:

     -s                 Query printer status

  Notes:

    * The UP-D89x series is unable to report media type or levels, but
      can report media empty conditions.

 ***************************************************************************
  BACKEND=mitsu70x

   Model IDs recognized:

     mitsubishi-d70dw mitsubishi-d80dw mitsubishi-k60dw
     fujifilm-ask-300 mitsubishi-d707dw mitsubishi-k60dws

   Model IDs for backwards compatibility with older releases:

     kodak-305 mitsud80 mitsuk60 kodak305 fujiask300

   Supported and tested printers:

    Fujifilm ASK-300
    Kodak 305
    Mitsubishi CP-D70DW
    Mitsubishi CP-D70DW-S
    Mitsubishi CP-D707DW
    Mitsubishi CP-D707DW-S
    Mitsubishi CP-D80DW
    Mitsubishi CP-K60DW-S

   Unsupported printers (Unknown VID/PID):

    Mitsubishi CP-D80DW-S

   Development was sponsored in part by:

	Schreiber & Freunde GmbH & Co. KG
	A generous benefactor who wishes to remain anonymous

   *** VERY IMPORTANT ***

        In order to generate usable output, this family of printers require
	the input data to be transformed using specific image processing
	algorithms.

	The library that implements this processing is dynamically loaded
	at runtime.  There is currently only one option:

	 * libMitsuD70ImageReProcess -- GPL'd re-implementation of the
	   Mitsubishi algorithms, available as source.  No guaranteees are
	   made about its output quality versus Mitsubishi's
	   proprietary drivers, but is generally considerd quite good.

	   DISCLAIMER:  Mitsubishi was not involved in the creation of
	   libMitsuD70ImageReProcess and is not responsible in any way for
	   any deficiencies in its output.  They will provide no support if
	   it is used.

	   Do *NOT* contact Mitsubishi for support if you are using
	   any combination of gutenprint, selphy_print or libMitsuD70ImageReProcess.

             (Please see the full disclaimer in libMitsuD70ImageReProcess.c)

   Valid commands:

     -j			Query Job status
     -k num		Specify standby delay (1-60 minutes, 0 disables)
     -s                 Query printer status
     -w                 Wake up printer
     -W                 Wake up printer (and wait)
     -x num             Set USB iSerialNumber reporting (1 yes, 0 no) [1]
     -X id              Cancel print job 'id' [2]

    [1]  Printer will need to be power-cycled for this to take effect.
    [2]  Job ID is the Internal Job ID (reported via job status query)

 ***************************************************************************
  BACKEND=mitsud90

   Model IDs recognized:

     mitsubishi-d90dw

   Supported and tested printers:

    Mitsubishi CP-D90DW
    Mitsubishi CP-M1A / CP-M1E

   Work-in-progress printers:

    Mitsubishi CP-M15E

   *** VERY IMPORTANT ***

    The CP-M1 family is similar to the CP-D70 family in that it requires
    the input data to be gamma corrected (and transformed in other ways)
    before it is sent to the printer.

    Consideeable progress has been made, and the implementation is
    considered feature-complete. In theory, the output quality should be
    comparable to Mitsubishi's own drivers.

    This code has been implemented in the lib70 driver, and note that while
    feature complete, it has NOT been tested.

    Mitsubishi was *NOT* involved in the creation of this library, and is
    not responsible in any way for the library or any deficiencies in its
    output.  They will provide no support if it is used.

   Valid commands:

     -i                 Query printer information
     -j jobid           Query job status [1]
     -k num		Specify standby delay (1-255 minutes, 0 disables)
     -m                 Query printer media
     -s                 Query printer status
     -x num             Set USB iSerialNumber reporting (1 yes, 0 no) [2]

    [1]  Job ID is the Internal Job ID (reported via job status query)
    [2]  Printer will need to be power-cycled for this to take effect.
         Only valid for CP-D90

 ***************************************************************************
  BACKEND=mitsu9xxx

   Model IDs recognized:

     mitsubishi-9000dw mitsubishi-9500dw mitsubishi-9550dw mitsubishi-9550dw-s
     mitsubishi-9600dw mitsubishi-9800dw mitsubishi-9800dw-s mitsubishi-9810dw
     mitsubishi-9550d mitsubishi-9550dz mitsubishi-9800d mitsubishi-9800dz
     mitsubishi-9810d

   Model IDs for backwards compatibility with older releases:

     mitsu9000 mitsu9500 mitsu9550 mitsu9600 mitsu9800 mitsu9810

   Supported and tested printers:

    Mitsubishi CP9550D/DW and CP9550DZ/DZS/DW-S
    Mitsubishi CP9600D/DW
    Mitsubishi CP9800DZ/DZS/DW-S                     [1]

   Unverified/untested, but should work:  (let us know, please!)

    Mitsubishi CP9800D/DW                            [1]
    Mitsubishi CP9810D/DW                            [1]
    Mitsubishi CP9820DW-S                            [1]

   Work-in-progress printers:

    Mitsubishi CP9000D/DW
    Mitsubishi CP9500D/DW

   Unsupported (unknown VID/PID):

    Mitsubishi CP30DW
    Mitsubishi CP9600DW-S/DZ/DZ-S

   Valid commands:

     -s                 Query printer status
     -m                 Query printer media
     -X                 Cancel current job

  Notes:

    [1]  **** VERY IMPORTANT ****

    The CP-98xx family is similar to the CP-D70 family in that it requires
    the input data to be gamma corrected (and transformed in other ways)
    before it is sent to the printer.

    Considerable progress has been made in decoding the CP-98xx data
    tables and algorithms, and everything but sharpening has now been
    implemented.  In theory, the output quality should be comparable to
    Mitsubishi's own drivers.

    This code has been implemented in the lib70 driver, and note that while
    feature complete, it has NOT been tested.

    Mitsubishi was *NOT* involved in the creation of this library, and is
    not responsible in any way for the library or any deficiencies in its
    output.  They will provide no support if it is used.

 ***************************************************************************
  BACKEND=mitsup9x

   Model IDs recognized:

     mitsubishi-p95d mitsubishi-p93d

   Model IDs for backwards compatibility with older releases:

     mitsup95d mitsup93d

   Development was sponsored by:

	A benefactor who wishes to remain anonymous

   Verified supported printers:

     Mitsubishi P95DW
     Mitsubishi P93DW

   Valid commands:

     -s                 Query printer status

  Notes:

    * These models cannot report media type or remaining levels,
      but are able to report out of media conditions.

 ***************************************************************************
  BACKEND=dnp_citizen

   Model IDs recognized:

      dnp-ds40 dnp-ds80 dnp-ds80dx dnp-ds620 dnp-ds820 dnp-dsrx1 dnp-ds620
      dnp-qw410
      citizen-cw-01 citizen-cw-02 citizen-cx-02 citizen-cx citizen-cx-w
      citizen-cy citizen-cy-02 citizen-op900 citizen-op900ii citicen-cx-02w
      citizen-cz-01

   Model IDs for backwards compatibility with older releases:

      dnpds40 dnpds90 dnpds80dx dnpds620 dnpds820 dnpdsrx1
      citizencw01 citizencw02 citizencx02

   Verified supported printers:

    DNP DS40 (aka Citizen CX)
    DNP DS80 (aka Citizen CX-W)
    DNP DS80DX
    DNP DS620 / DS620A (aka Citizen CX-02)
    DNP DS820 / DS820A (aka Citizen CX-02W)
    DNP DS-RX1 / DNP DS-RX1HS (aka Citizen CY and CY-02)
    DNP DS-QW410

   Theoretically supported printers:  (Untested)

    Citizen CW-01 / OP900
    Citizen CW-02 / OP900II
    Citizen CX-02
    Citizen CZ-01
    Mitsubishi CP-3800DW

   Work-in-progress printers: (USB PIDs unknown)

    DNP M4 / Q4
    Olmec OP900
    ICI Imagedata OP900

   Development was sponsored in part by:

	Marco Di Antonio
	LiveLink Technology [ www.livelinktechnology.net ]
	Multiple generous benefactors who whish to remain anonymous

   This backend supports additional commands:

     -i                 Query printer information (resolution, etc)
     -I                 Query printer sensor information
     -n                 Query printer counters
     -N [ A | B | M ]   Reset Counter A/B/M                                 [2]
     -p num             Set 'P' counter to 'num'                            [2]
     -s                 Query printer status
     -k num		Specify standby delay (1-99 minutes, 0 disables)    [1]
     -K num		Keep Media Status Across Power Cycles (1 yes, 0 no) [4]
     -x num             Set USB iSerialNumber reporting (1 yes, 0 no)       [3]
     -X                 Cancel current job
     -R                 Reset printer to defaults

Notes:

     [1] Only supported by DS620 and DS820
     [2] Certain printer features may require updating the printer firmware
     [3] Only supported by RX1HS, DS620, DS820, and QW410
     [4] Only supported by DS620, DS820, and QW410

 ***************************************************************************
  BACKEND=magicard

   Model IDs recognized:

      magicard-tango-2e magicard-enduro magicard-enduroplus magicard-rio-2e

   Model IDs for backwards compatibility with older releases:

      tango2e enduro enduroplus

   Verified supported printers:

    Tango 2E

   Work-in-progress printers:

    Rio 2E
    Tango +L
    Enduro
    Enduro+
    (And all others)

   This backend supports additional commands:

      magicard [command [arg] ]

   Valid commands:

     -s                 Query printer status
     -q                 Generate printer information dump
     -I			Query printer sensors
     -T                 Print self-test card
     -E                 Eject card in printer
     -R                 Reset printer

  Notes:

    * These models cannot report media type or remaining levels,
      but are able to report out of media conditions.

***************************************************************************
  BACKEND=hiti

   Model IDs recognized:

      hiti-p520l hiti-p525l hiti-p52x
      hiti-p720l hiti-p750l

   Verified supported printers:

     HiTi P520L
     HiTi P525L

   Theoretically supported printers (Untested)

     HiTi P720L
     HiTi P750L

   Work-in-progress printers

     HiTi P110 series
     HiTi P510 series

   This backend supports additional commands:

      hiti [command [arg] ]

   Valid commands:

     -i                 Query printer information
     -r                 Soft reset printer
     -R                 Reset printer to factory defaults
     -s                 Query printer status

  Notes:

    * Firmware v1.19-v1.21 for the P520L and P525L have a major issue
      that results in bulk data transfers not functioning under Linux.
      This problem also affected HiTi's semi-official Linux drivers, and
      was finally fixed in v1.22.

***************************************************************************