[sane-devel] Additional model support for epson2 / epsonds backend

[Ulf Zibis]

Am 29.11.21 um 07:36 schrieb Nakamura Iwao:
> Dear All,
> Thank you for your continuous efforts for SANE project, and merging previous our patch.
> We have supported a few new MFPs (those are selling now) additionally for epson2 / epsonds backend as below:


Hi Iwao,

can you tell us how bug reporting works for Epson drivers?

I had send the following message several times, but there is no reaction.

-Ulf

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-------- Weitergeleitete Nachricht --------

Betreff: 	Bug in iscan_2.30.4-2_amd64.deb
Datum: 	Sun, 3 Oct 2021 19:47:03 +0200
Von: 	Ulf Zibis <Ulf.Zibis at CoSoCo.de>
An: 	SEIKO EPSON Corporation <linux-printer at epson.jp>



Hi there,

I suspect, there is a small bug in iscan_2.30.4-2_amd64.deb.

The problem of the bug is mentioned here: https://sourceforge.net/p/gscan2pdf/bugs/389/#04ec/a0ea

And here: https://gitlab.com/utsushi/utsushi/-/issues/68#note_626389990

In my experience, |scanimage --help| dynamically adapts its output upon the given options before |--help|, i.e., the stated default values of options differ upon them. Please compare:

|$ scanimage --source='Automatic Document Feeder' --scan-area=A4 --help [.....] Options specific to device `epkowa:usb:002:003': [.....] Geometry: --scan-area Maximum|A4|A5 Landscape|A5 Portrait|B5|Legal|Letter|Executive|CD [A4] Select an area to scan based on well-known media sizes. -l 0..215.9mm [5.89999] Top-left x position of scan area. -t 0..355.6mm [0] Top-left y position of scan area. -x 0..210mm [210] Width of scan-area. -y 0..355.6mm [297] Height of scan-area. --quick-format Maximum|A4|A5 Landscape|A5 Portrait|B5|Legal|Letter|Executive|CD [A4] Select an area to scan based on well-known media sizes. (DEPRECATED) [.....]|

|$ scanimage --scan-area=A4 --source='Automatic Document Feeder' --help [.....] Options specific to device `epkowa:usb:002:003': [.....] Geometry: --scan-area Maximum|A4|A5 Landscape|A5 Portrait|B5|Legal|Letter|Executive|CD [A4] Select an area to scan based on well-known media sizes. -l 0..215.9mm [0] Top-left x position of scan area. -t 0..355.6mm [0] Top-left y position of scan area. -x 0..215.9mm [215.9] Width of scan-area. -y 0..355.6mm [355.6] Height of scan-area. --quick-format Maximum|A4|A5 Landscape|A5 Portrait|B5|Legal|Letter|Executive|CD [A4] Select an area to scan based on well-known media sizes. (DEPRECATED) [.....]|

The latter still lists |--scan-area| and |--quick-format| as |A4|, instead |Maximum|. In the opinion of the developer of gscan2pdf this is a bug. I too think, he is right, as if frontends rely on this help defaults, the user gets presented the wrong values in the GUI.

Thanks to review this problem,

-Ulf
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