gimp-print-devel

Re: [Gimp-print-devel] Introduction

[Robert K. <rl...@al...>]

On 5/22/22 19:06, Robert Krawitz wrote:
> On 5/22/22 08:52, Sahil Kumar wrote:
>> Hey community, I am Sahil a sophomore engineering student. My proposal for "*Make native Printer
>> Application for Gutenprint*" has been accepted as a part of GSoC 2022. 
>>
>> Can somebody help me get started with Gutenprint as I am new to it? What is expected in a Printer
>> Application? 
> 
> Hi,
> 
> I assume Till has discussed with you in general what a printer is, so I won't go into that.

That is, what a printer *application* is :-)

Re: [Gimp-print-devel] Introduction

[Robert K. <rl...@al...>]

On 5/22/22 08:52, Sahil Kumar wrote:
> Hey community, I am Sahil a sophomore engineering student. My proposal for "*Make native Printer
> Application for Gutenprint*" has been accepted as a part of GSoC 2022. 
> 
> Can somebody help me get started with Gutenprint as I am new to it? What is expected in a Printer
> Application? 

Hi,

I assume Till has discussed with you in general what a printer is, so I won't go into that.

Gutenprint is a suite of printer drivers for Linux, MacOS, and other POSIX operating systems.  It's
divided into a number of components:

* The core library, which provides the Gutenprint API (which only has C bindings) that higher level
client applications use to provide printing services (in src/main).  The Gutenprint API includes
functionality for things like printing raster data (on a page basis), printer and option discovery,
and option setting.  Your native printer application should interface only with the core API,
defined in <include/gutenprint>.  The library provides other downward-facing services (see next
paragraph).  *Everything in the API is prefixed with "stp_" and you should not use anything prefixed
with "stpi", as these are internal functions*.

* Drivers for families of printers (e. g. Epson inkjets, Canon inkjets, PCL printers, dye
sublimation printers).  These family drivers provide information to Gutenprint about what printers
they support and their capabilities via an internal API (in <include/gutenprint-internal>, which you
should not use), in addition to sending printer-specific commands, and in some cases
printer-specific communication protocols).  The Epson inkjet driver uses XML data internally to
describe printers, so it doesn't require changes to .c files in most cases to add new printers.  The
other family drivers hard code much of the information, although the list of supported printers is
always in XML.

* A CUPS driver based on the CUPS 1 standard, using PPD files for applications to discover and set
printer options (in src/cups).  Included with this is a PPD file generator using the Gutenprint API
to discover options; there's also a utility to update PPD files, as PPD files are version locked to
the micro version of Gutenprint that they were generated for (this enables us to add new
capabilities to printers).  Both the CUPS driver and the PPD file generator are Gutenprint API
clients.  *This is the piece that the printer application will replace*.

* A GIMP2 plugin.  This is actually divided into two parts, a generic (or at least not
GIMP-specific) UI library (src/gutenprintui2) and a GIMP-specific plugin (src/gimp2).  Both of these
are interactive; libgutenprintui2 provides the actual UI, while src/gimp2 is the GIMP glue code.

The capabilities of printers vary substantially, and I'm a strong believer in exposing as much
functionality as possible to end users to enable maximum control, so the goal here is to create a
Printer Application that exposes the full capabilities of Gutenprint without the use of PPD files in
the legacy CUPS driver.  The idea is certainly not to blitz an end user with a huge list of options,
so options are divided into two classes, one for printer functionality and one for color adjustment,
and several different levels, from basic through more levels of advanced options.  That can suggest
to applications how to organize what they present to end users.  It's possible using the more
advanced options to cause problems (e. g. by using excessive amounts of ink for the media used), but
some of these options are needed for use cases such as T-shirt printing.  Printing T-shirts, for
example, requires use of enormous amounts of ink, but if someone tries to apply that much ink to
paper, it will puddle and likely make a real mess inside the printer.  Options like that are always
in one of the more advanced levels.

A problem with the PPD file approach is that they're static; they cannot easily represent
dependencies between options, so we currently have to be very permissive about what combinations of
options we accept.  Interactive clients, such as the GIMP plugin and the printer application that
you'll be writing, can manage dependencies, so we can do things like hiding color options for
grayscale printing.  Clients don't need to know anything about those options per se; the core API
presents the options that are compatible with other options that are set.

My suggestion would be to start learning how Printer Applications work, and to use libgutenprintui2
to see how an interactive client interacts with libgutenprint.

I'm the project lead for Gutenprint.  Unfortunately, due to personal circumstances my time and
energy will be limited this summer, so I will not be your main mentor.  Solomon Peachy, a very
experienced developer who has been with Gutenprint for many years, will be your direct mentor.  I
will answer questions as I can, but I may not be very responsive much of the time.

[Gimp-print-devel] Introduction

[Sahil K. <nsu...@gm...>]

Hey community, I am Sahil a sophomore engineering student. My proposal
for "*Make
native Printer Application for Gutenprint*" has been accepted as a part of
GSoC 2022.

Can somebody help me get started with Gutenprint as I am new to it? What is
expected in a Printer Application?

Thanks and regards
Sahil Kumar

Re: [Gimp-print-devel] Kyocera ECOSYS P5021cdn driver

[Robert K. <rl...@al...>]

On 5/21/22 07:03, Carlos wrote:
> Which would be the recommended Gutenprint driver for a Kyocera ECOSYS P5021cdn?

Generic PCL-6/PCL-XL.

> I recently purchased this printer and installed the ppd provided by the manufacturer. It prints
> great, but I miss some extra stuff. In the CUPS menu I find a Booklet/Folding option, but it does
> nothing. Looking into the PPD, I find that this option is empty.

I would expect that to be handled by the driver rather than the printer, in which case it wouldn't
have to do anything; merely having the option set is suffice.  That kind of high level functionality
usually is handled by the driver; any duplexing, stapling, etc. would be handled by sending those
commands to the printer rather than a booklet command per se.

> I tried a Gutenprint driver (I don't remember exactly which), and it works, although the printing is
> not that good.

Do you remember what settings you were using?

> Do you know of any general Gutenprint driver including the Booklet option that can maybe work here?

Unfortunately, we don't offer that option.

> Having more choices in terms of resolution so that I could save toner by reducing it would also be
> nice?

IIRC our driver offers 150x150, 300x300, and 600x600 DPI.

[Gimp-print-devel] Kyocera ECOSYS P5021cdn driver

[Carlos <car...@gm...>]

Which would be the recommended Gutenprint driver for a Kyocera ECOSYS 
P5021cdn?

I recently purchased this printer and installed the ppd provided by the 
manufacturer. It prints great, but I miss some extra stuff. In the CUPS 
menu I find a Booklet/Folding option, but it does nothing. Looking into 
the PPD, I find that this option is empty.

I tried a Gutenprint driver (I don't remember exactly which), and it 
works, although the printing is not that good.

Do you know of any general Gutenprint driver including the Booklet 
option that can maybe work here?

Having more choices in terms of resolution so that I could save toner by 
reducing it would also be nice?

Thanks for your help.

Re: [Gimp-print-devel] HP Photosmart C309a

[Matt B. <wal...@ma...>]

> On May 9, 2022, at 4:56 AM, r vanden <rv...@gm...> wrote:
> 
> Would it be possible for someone to write drivers for this printer to work on macOS Monterey 12.3.1?  

The Photosmart C309a uses the PCL3 GUI printer language.  This code set is not supported by Gutenprint.  There would have to be a volunteer to offer to write such drivers.
Matt

Re: [Gimp-print-devel] Reverse order Canon PIXMA driver

[Matt B. <wal...@ma...>]

> I am writing in regards to an issue I have with printing. This is with all drivers but since I love Gutenprint the most I would love to see a persistent fix for it. The issue is that when I print everything is reversed, it starts printing the first page but the pages pile up so they end up reversed. Now, the most persistent fix I found was to add: "*DefaultOutputOrder: Reverse" to the ppd file. But after every cups update this becomes undone...
> Is there a way I can fix this forever? Or even better could you add this to the driver? As in my eyes it would be better to make this behaviour the default. At least, for this printer the Canon PIXMA MG4250.

Depending on your operating system, you may be able to save a set of output options for your printer.  In a print window on macos, you can select Reverse Page Order under Paper Handling.  You can then save that as a Preset.
Matt

Re: [Gimp-print-devel] Printer list not showing up on MAC OS Monterey 12.3.1

[Matt B. <wal...@ma...>]

> On May 11, 2022, at 4:52 PM, Mike OMeara <mjo...@ho...> wrote:
> 
> I have searched high and low but cannot figure out why I don’t see the extensive list of printers. I have installed your latest build for MAC 5.3.3.

A list of supported printers can be found at 
http://gimp-print.sourceforge.net/p_Supported_Printers.php

There is no way to produce a list of supported printers from the driver software.  You would ba able to choose one of the drivers when you add a printer through System Preference  -->   Printers & Scanners 

Matt

[Gimp-print-devel] Question regarding DNP-DS620 printer setting in command line on Linux Ubuntu, able to expand print size width

[Antoine B. <an...@em...>]

Hello Miss, Sir,
I contact you because my company would like to be able to change the 
width of the size of the prints on the DP-DS620 printer on Linux Ubuntu.
We know that DNP company Hotfolder application on Windows and Mac works 
and allows printing with wider widths than the basic formats offered by 
the printer, we would like to be able to do the same on Linux Ubuntu 
version 20.04LTS from the command line.
You can find the Hotfolder app on their website: 
http://dnpphoto.com/en-us/Utility-Apps.
Currently we are using a gutenprint 5.3.3 driver for the DNP-DS620. Here 
are the available options:

PageSize/Media Size: B7 w288h432 w288h432-div2 w324h432 w360h360 
w360h504 w360h504-div2 w360h504-w360h360_w360h144 w432h432 *w432h576 
w432h576-w432h432_w432h144 w432h576-div4 w432h576-div2 w432h648 
w432h648-div2
ColorModel/Color Model: Gray Black *RGB CMY CMYK KCMY
StpColorPrecision/Color Precision: *Normal Best
Resolution/Resolution: *300dpi 300x600dpi
StpiShrinkOutput/Shrink Page If Necessary to Fit Borders: *Shrink Crop 
Expand
StpLaminate/Overcoat Pattern: *Glossy Matte MatteFine MatteLuster
StpNoCutWaste/No Cut-Paper Waste: *False True
StpColorCorrection/Color Correction: *None Accurate Bright Hue 
Uncorrected Desaturated Threshold Density Raw Predithered
StpBrightness/Brightness: 0 100 200 300 400 500 600 700 800 900 *None 
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Custom.REAL
StpFineBrightness/Brightness Fine Adjustment: *None 0 5 10 15 20 25 30 
35 40 45 50 55 60 65 70 75 80 85 90 95
StpContrast/Contrast: 0 100 200 300 400 500 600 700 800 900 *None 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 Custom.REAL
StpFineContrast/Contrast Fine Adjustment: *None 0 5 10 15 20 25 30 35 40 
45 50 55 60 65 70 75 80 85 90 95
StpSaturation/Saturation: 0 100 200 300 400 500 600 700 800 900 *None 
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 
2500 2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 
3900 4000 4100 4200 4300 4400 4500 4600 4700 4800 4900 5000 5100 5200 
5300 5400 5500 5600 5700 5800 5900 6000 6100 6200 6300 6400 6500 6600 
6700 6800 6900 7000 7100 7200 7300 7400 7500 7600 7700 7800 7900 8000 
8100 8200 8300 8400 8500 8600 8700 8800 8900 9000 Custom.REAL
StpFineSaturation/Saturation Fine Adjustment: *None 0 5 10 15 20 25 30 
35 40 45 50 55 60 65 70 75 80 85 90 95
StpImageType/Image Type: None Text Graphics *TextGraphics Photo LineArt
StpGamma/Composite Gamma: 100 200 300 400 500 600 700 800 900 1000 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 *None Custom.REAL
StpFineGamma/Composite Gamma Fine Adjustment: *None 0 5 10 15 20 25 30 
35 40 45 50 55 60 65 70 75 80 85 90 95
StpCyanGamma/Cyan: 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 
1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 
2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 4000 
*None Custom.REAL
StpFineCyanGamma/Cyan Fine Adjustment: *None 0 5 10 15 20 25 30 35 40 45 
50 55 60 65 70 75 80 85 90 95
StpMagentaGamma/Magenta: 0 100 200 300 400 500 600 700 800 900 1000 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 *None Custom.REAL
StpFineMagentaGamma/Magenta Fine Adjustment: *None 0 5 10 15 20 25 30 35 
40 45 50 55 60 65 70 75 80 85 90 95
StpYellowGamma/Yellow: 0 100 200 300 400 500 600 700 800 900 1000 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 *None Custom.REAL
StpFineYellowGamma/Yellow Fine Adjustment: *None 0 5 10 15 20 25 30 35 
40 45 50 55 60 65 70 75 80 85 90 95
StpCyanBalance/Cyan Balance: 0 100 200 300 400 500 600 700 800 900 1000 
*None Custom.REAL
StpFineCyanBalance/Cyan Balance Fine Adjustment: *None 0 5 10 15 20 25 
30 35 40 45 50 55 60 65 70 75 80 85 90 95
StpMagentaBalance/Magenta Balance: 0 100 200 300 400 500 600 700 800 900 
1000 *None Custom.REAL
StpFineMagentaBalance/Magenta Balance Fine Adjustment: *None 0 5 10 15 
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
StpYellowBalance/Yellow Balance: 0 100 200 300 400 500 600 700 800 900 
1000 *None Custom.REAL
StpFineYellowBalance/Yellow Balance Fine Adjustment: *None 0 5 10 15 20 
25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
StpLinearContrast/Linear Contrast Adjustment: *False True

We thank you in advance for any help.

Antoine Birkhofer
Developer at Emc2Studio

[Gimp-print-devel] Reverse order Canon PIXMA driver

[Ronin v. d. W. <ron...@gm...>]

Dear Sir/Madam,

I am writing in regards to an issue I have with printing. This is with
all drivers but since I love Gutenprint the most I would love to see a
persistent fix for it. The issue is that when I print everything is
reversed, it starts printing the first page but the pages pile up so
they end up reversed. Now, the most persistent fix I found was to add:
"*DefaultOutputOrder: Reverse" to the ppd file. But after every cups
update this becomes undone...
Is there a way I can fix this forever? Or even better could you add
this to the driver? As in my eyes it would be better to make this
behaviour the default. At least, for this printer the Canon PIXMA
MG4250.

I am looking forward to your reply,

With kind regards,
Ronin van der Werke

[Gimp-print-devel] Printer list not showing up on MAC OS Monterey 12.3.1

[Mike O. <mjo...@ho...>]

I have searched high and low but cannot figure out why I don’t see the extensive list of printers. I have installed your latest build for MAC 5.3.3.

[Gimp-print-devel] HP Photosmart C309a

[r v. <rv...@gm...>]

Would it be possible for someone to write drivers for this printer to work
on macOS Monterey 12.3.1?

Thanks!

Ronald Vanden

Re: [Gimp-print-devel] Problems with Canon G3510 not talking to my MacBook Pro Monterey 12.3.1

[Matt B. <wal...@ma...>]

> Can you send me the link to use to get these two talking please?

Unfortunately, Gutenprint does not support the Canon PIXMA G3510.  It is not likely to work, but you could try the  PIXMA G3100 driver from Gutenprint.  the macos package is at gutenprint-5.3.3_rev.dmg <https://sourceforge.net/projects/gimp-print/files/gutenprint-5.3/5.3.3/gutenprint-5.3.3_rev.dmg/download>
Matt

Re: [Gimp-print-devel] Need help with ESC/p2 command

[Robert K. <rl...@al...>]

On 4/29/22 04:21, Andrew X wrote:
> Hello. I need some help with esc/p2 command 
> I need 2 commands to move paper forward and backward

There's no way I know of to move the paper backward.

Re: [Gimp-print-devel] Guten Print

[Matt B. <wal...@ma...>]

> On Apr 28, 2022, at 6:06 AM, Ashley Anderson <bit...@gm...> wrote:
> 
> Hello Ive recently purchased an Epson ET 4800 series and unfortunately im having issues being able to print from Gimp with it which I need to be able to do  I downloaded the drivers and went to select the correct printer using gutenprint but it is not listed. Just wanted to check if there were any options for me before I go paying for Photoshop :(. 
> 
> -macOS Monterey 12.3.1

Gutenprint does not support the Epson ET 4800.  The Epson support pages for the Epson ET 4800 indicate that they do support your printer for macos 12.3.1.

Matt

[Gimp-print-devel] Problems with Canon G3510 not talking to my MacBook Pro Monterey 12.3.1

[<dol...@ic...>]

Hello


Can you send me the link to use to get these two talking please?

Many thanks


Michelle Dolan

[Gimp-print-devel] Need help with ESC/p2 command

[Andrew X <68...@gm...>]

Hello. I need some help with esc/p2 command
I need 2 commands to move paper forward and backward
As I found its a ESC (v and ESC (V
in print file i found command, it moves paper forward, but I can't
understand parameters mo move backward
1b 28 76 04 00 50 00 00 00
1b - ESC
28 - (
76 - v
04 - bytes in command
and i dont know description of other bites
00 -?
50 - if i change it - changing length of moving
00 - ?
00 - ?
00 - Thero before next ESC?

[Gimp-print-devel] Guten Print

[Ashley A. <bit...@gm...>]

Hello Ive recently purchased an Epson ET 4800 series and unfortunately im having issues being able to print from Gimp with it which I need to be able to do  I downloaded the drivers and went to select the correct printer using gutenprint but it is not listed. Just wanted to check if there were any options for me before I go paying for Photoshop :(. 

-macOS Monterey 12.3.1

Re: [Gimp-print-devel] Mitsubishi printers

[Solomon P. <pi...@sh...>]

On Tue, Apr 19, 2022 at 07:25:07PM -0500, Matt Broughton wrote:
>    The user has a Mitsubishi CP-D70DW-S printer.  It is said to be a 
>    System model made for a kiosk.  Is this printer supported by 
>    Gutenprint? 

Yes, it is, as of... March 2020.

> The News for v5.3.4 says there is now support for the 
>    CP-D70DW-S but cups-genppd.5.3 doesn't have it as an available 
>    model. 

The 5.3.4 tarballs were uploaded in December 2020, so tha should be good.

BTW, the D70-S and D707-S models did not get different USB IDs or 
iProduct strings; they need to be detected at runtime based to the 
response to a special query, which enables a few minor tweaks to the 
command stream when printing thigns. They also do not accept the same 
media kits as the non-S variants.

> Also, is there a way to test the gutenprint53+usb backend 
>    without a printer?  That would be of great benefit in 
>    troubleshooting. Matt

There are some test modes, but it's mostly limited to printjob parsing 
and validation.  Anything requiring communication to the printer is 
bypassed.  (I have a CI setup that validates the backend against 
gutenprint's output for every supported model, with a stragetic set of 
print options)

That said, as I already mentioned in the forum discussion, the other 
thing these Mitsubishi models require to print is the "image processing 
library" needed to convert the 8bpp RGB output of gutenprint to the 
14bpp CMY gamma/thermal-corrected data the printer needs.  (All but one 
of Mitsubishi's color photo printers for the past decade have required 
host-side image processing)

I reverse-engineered Mitsubishi's algorthms and re-implemented them in a 
runtime-loaded GPLv3 library that lives outside of the Gutenprint 
repository.  I did it this way to protect both myself and Gutenprint in 
case Mitsubishi went all squirrely.

For Linux users, it's been easy enough to compile this for themselves, 
but this doesn't help folks on MacOS -- but at the same time, I've not 
generally cared about MacOS as Mitsubishi has historically provided 
drivers for that platform.  Notwithstanding special variants (-S, etc)

More recently, Mitsubishi has exited the printer business, so it might 
be worth revisiting the decision to keep this library and data files 
separate, bundling it with the rest of Gutenprint.

(FWIW, a similar-in-spirit, external run-time loaded library is also 
 needed for two Sinfonia printers..)

 - Solomon
-- 
Solomon Peachy			      pizza at shaftnet dot org (email&xmpp)
                                      @pizza:shaftnet dot org   (matrix)
High Springs, FL                      speachy (libra.chat)

[Gimp-print-devel] Mitsubishi printers

[Matt B. <wal...@ma...>]

<html><head></head><body dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="ApplePlainTextBody"><div class="ApplePlainTextBody">Solomon,<br>Would you help us out at https://sourceforge.net/p/gimp-print/discussion/4359/thread/348bd356b5/?limit=25#58d6 ? &nbsp;The user has a Mitsubishi CP-D70DW-S printer. &nbsp;It is said to be a System model made for a kiosk. &nbsp;Is this printer supported by Gutenprint? &nbsp;The News for v5.3.4 says there is now support for the CP-D70DW-S but cups-genppd.5.3 doesn't have it as an available model.<br><br>Also, is there a way to test the gutenprint53+usb backend without a printer? &nbsp;That would be of great benefit in troubleshooting.<br>Matt</div></body></html>

Re: [Gimp-print-devel] Support of the DNP QW 410

[Solomon P. <pi...@sh...>]

On Tue, Apr 05, 2022 at 11:34:47PM +0200, Moritz Gräßler - SelfieMate wrote:
> Hello dear team,
> can you tell me if and when the DNP QW 410 will be supported?

Support landed in april 2020.  You will need a 5.3.4 snapshot build.

 - Solomon
-- 
Solomon Peachy			      pizza at shaftnet dot org (email&xmpp)
                                      @pizza:shaftnet dot org   (matrix)
High Springs, FL                      speachy (libra.chat)

[Gimp-print-devel] Support of the DNP QW 410

[Moritz G. - S. <ch...@se...>]

Hello dear team,
can you tell me if and when the DNP QW 410 will be supported?

Kind regards! 
Moritz Gräßler 
Geschäftsführer

Mobil: 0170/4948065
Mail: ch...@se...
Online: www.selfiemate.de

Re: [Gimp-print-devel] Init sequence to disable PW sensor on EPSON

[Andrew X <68...@gm...>]

I can put it into raw print file or into xml to test if you tell me what
and were I need to insert

пн, 4 апр. 2022 г., 03:13 Robert Krawitz <rl...@al...>:

> On 4/3/22 12:59, Solomon Peachy wrote:
> > On Sun, Apr 03, 2022 at 11:30:56AM -0400, Robert Krawitz wrote:
> > But starting at #663 things get more interesting, with the REMOTE
> command:
> >
> > 0010                                    40 40 00 49 00   .......I...@
> @.I.
> > 0020   00 1b 28 52 08 00 00 52 45 4d 4f 54 45 31 53 4e   ..(R...REMOTE1SN
> > 0030   2e 00 00 13 0b 00 de 0a d8 04 18 01 1b 02 f0 00   ................
> > 0040   00 00 00 00 e8 05 00 00 00 00 00 00 01 01 01 01   ................
> > 0050   01 01 01 01 01 01 00 02 01 00 00 00 00 02 f1 03   ................
> > 0060   1b 00 00 00                                       ....
> >
> > 0010                                    40 40 00 0c 00   ...........@@...
> > 0020   00 0d 0a 0d 0a 0d 0a                              .......
> >
> >
> 4040004900001b285208000052454d4f544531534e2e0000130b00de0ad80418011b02f00000000000e805000000000000010101010101010101010002010000000002f1031b000000
> > 4040000c00000d0a0d0a0d0a
> >
> > The rest of the packets are a series of command-responses, presumably
> querying printer parameters.
> >
> > (Now I'm idly wondering if it wouldn't make sense to try and write an
> >  ESC/P dissector for Wireshark..)
>
> Remote mode commands are of the form
>
> XX (2 ASCII bytes)
> ll hh (little endian short, how many bytes)
> data
>
> So in this case, SN is the command (which is described as "select
> mechanism sequence").  It's then
> followed by 0x2e bytes of data.
>
> For the "SN" command, the first two bytes are the subcommand, which is 00
> 0x13.  Unfortunately, I
> don't know what the subcommand 0x13 means, so the rest of the data doesn't
> mean too much to me.
>
> One possibility would be to extract that literal command, put it in the
> print stream at the right
> place, and see if it solves the problem.  I believe those would be the
> bytes from 0x32 to 0x5f; the
> sequence starting at 0x60 (ESC 0 0 0) is the exit from remote mode, so
> that makes sense.
>
>
> _______________________________________________
> Gimp-print-devel mailing list
> Gim...@li...
> https://lists.sourceforge.net/lists/listinfo/gimp-print-devel
>

Re: [Gimp-print-devel] Init sequence to disable PW sensor on EPSON

[Robert K. <rl...@al...>]

On 4/3/22 12:59, Solomon Peachy wrote:
> On Sun, Apr 03, 2022 at 11:30:56AM -0400, Robert Krawitz wrote:
> But starting at #663 things get more interesting, with the REMOTE command:
> 
> 0010                                    40 40 00 49 00   .......I...@@.I.
> 0020   00 1b 28 52 08 00 00 52 45 4d 4f 54 45 31 53 4e   ..(R...REMOTE1SN
> 0030   2e 00 00 13 0b 00 de 0a d8 04 18 01 1b 02 f0 00   ................
> 0040   00 00 00 00 e8 05 00 00 00 00 00 00 01 01 01 01   ................
> 0050   01 01 01 01 01 01 00 02 01 00 00 00 00 02 f1 03   ................
> 0060   1b 00 00 00                                       ....
> 
> 0010                                    40 40 00 0c 00   ...........@@...
> 0020   00 0d 0a 0d 0a 0d 0a                              .......
> 
> 4040004900001b285208000052454d4f544531534e2e0000130b00de0ad80418011b02f00000000000e805000000000000010101010101010101010002010000000002f1031b000000
> 4040000c00000d0a0d0a0d0a
> 
> The rest of the packets are a series of command-responses, presumably querying printer parameters.
> 
> (Now I'm idly wondering if it wouldn't make sense to try and write an 
>  ESC/P dissector for Wireshark..)

Remote mode commands are of the form

XX (2 ASCII bytes)
ll hh (little endian short, how many bytes)
data

So in this case, SN is the command (which is described as "select mechanism sequence").  It's then
followed by 0x2e bytes of data.

For the "SN" command, the first two bytes are the subcommand, which is 00 0x13.  Unfortunately, I
don't know what the subcommand 0x13 means, so the rest of the data doesn't mean too much to me.

One possibility would be to extract that literal command, put it in the print stream at the right
place, and see if it solves the problem.  I believe those would be the bytes from 0x32 to 0x5f; the
sequence starting at 0x60 (ESC 0 0 0) is the exit from remote mode, so that makes sense.

Re: [Gimp-print-devel] Init sequence to disable PW sensor on EPSON

[Solomon P. <pi...@sh...>]

On Sun, Apr 03, 2022 at 11:30:56AM -0400, Robert Krawitz wrote:
> It looks to me like it is the right one.  I found this in packet #634.  This is a response from the
> printer.  1.3.0 looks like the right device; I'm just not sure how to extract the data from the host
> to the printer.

Oh yuck.  Wireshark thinks the packets are Bluetooth HCI, for some reason.  

There's only a handful of OUT packets. #639 is the @EJL header:

0010                                    00 00 00 1b 01   ................
0020   40 45 4a 4c 20 31 32 38 34 2e 34 0a 40 45 4a 4c   @EJL 1284.4.@EJL
0030   0a 40 45 4a 4c 0a                                 .@EJL.

0000001b0140454a4c20313238342e340a40454a4c0a40454a4c0a

But starting at #663 things get more interesting, with the REMOTE command:

0010                                    40 40 00 49 00   .......I...@@.I.
0020   00 1b 28 52 08 00 00 52 45 4d 4f 54 45 31 53 4e   ..(R...REMOTE1SN
0030   2e 00 00 13 0b 00 de 0a d8 04 18 01 1b 02 f0 00   ................
0040   00 00 00 00 e8 05 00 00 00 00 00 00 01 01 01 01   ................
0050   01 01 01 01 01 01 00 02 01 00 00 00 00 02 f1 03   ................
0060   1b 00 00 00                                       ....

0010                                    40 40 00 0c 00   ...........@@...
0020   00 0d 0a 0d 0a 0d 0a                              .......

4040004900001b285208000052454d4f544531534e2e0000130b00de0ad80418011b02f00000000000e805000000000000010101010101010101010002010000000002f1031b000000
4040000c00000d0a0d0a0d0a

The rest of the packets are a series of command-responses, presumably querying printer parameters.

(Now I'm idly wondering if it wouldn't make sense to try and write an 
 ESC/P dissector for Wireshark..)

 - Solomon
-- 
Solomon Peachy			      pizza at shaftnet dot org (email&xmpp)
                                      @pizza:shaftnet dot org   (matrix)
High Springs, FL                      speachy (libra.chat)