[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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https://bugs.kde.org/show_bug.cgi?id=387268

--- Comment #20 from caulier.gil...@gmail.com ---
As it's explained here, the Twain scanner driver must be installed before to
use on target Windows computer :

https://github.com/manisandro/gImageReader/wiki/FAQ

gImageReader can use Twain under Windows and as a frontend written in Qt5. So
perhaps the solution can be found here...

Gilles Caulier

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #19 from caulier.gil...@gmail.com ---
I think the problem with button from dialog in TWAIN interface is due to a
wrong re-route of TWAIN event loop to Qt5. This last one work fine with Qt4,
but with Qt5, this require certainly more indeed tunes.

Perhpas a post to Qt community wiki can help.

Look here : https://forum.qt.io/topic/53770/problem-with-qt-5-4-1-and-twain/2

Gilles Caulier

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #18 from hardy.pub...@gmail.com ---
No problem. I guess those comments on WIA was a false alarm because it seems
TWAIN still works on Windows 10 anyway.

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #17 from caulier.gil...@gmail.com ---
It's clear :

https://en.wikipedia.org/wiki/Windows_Image_Acquisition

WIA is a "proprietary" SDK... It will be difficult to use in open source
world...

Gilles Caulier

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #16 from caulier.gil...@gmail.com ---
Ah and i forget another VERY important point for me : cross compile under Linux
==> no M$ virus possible at end in the bundle (:=)))...

Open source must be safe for end users.

Gilles Caulier

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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https://bugs.kde.org/show_bug.cgi?id=387268

--- Comment #15 from caulier.gil...@gmail.com ---
TWAIN is perhaps deprecated under Windows, but it's a legacy digital
Acquisition system which must work as expected. From wikipedia page, this one
still maintained until now :

https://en.wikipedia.org/wiki/TWAIN

The advantage of Twain is the compilation one : it do not require an extra
library from Microsoft. All is include in core. This is why we can cross
compile whole DK with Twain support under Linux as well. This is a great
advantage, because we won't to require Windows and MSVC to compile the whole DK
bundle including Qt5, KF5, and all extra dependecies required. With a cross
compiler open source as MXE, i just to press a button under Linux, and 2 hours
later, the installer is ready to use under Windows. Magic.

In other words, i won't to use M$ stuff to compile whole DK : it's just a waste
of time. M$ is not a devel env for me, it's just a graphic console dedicated to
run softwares.

I'm my viewpoint, very negative about Windows, but it's the reality. I devel
cross plateform softwares in my office, and Windows is THE computer puzzle for
developers.

So, from my side, There is no way to switch whole DK windows compilation in the
future, and until the end of the world.

Gilles Caulier

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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https://bugs.kde.org/show_bug.cgi?id=387268

--- Comment #14 from hardy.pub...@gmail.com ---
Created attachment 109554
  --> https://bugs.kde.org/attachment.cgi?id=109554=edit
XnView can select both scanners.

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #13 from hardy.pub...@gmail.com ---
Yes, same problem.

In XnView MP I can select the virtual scanner and my CanoScan 4200F but still
nothing happens in digiKam.

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

[Kåre Särs]

https://bugs.kde.org/show_bug.cgi?id=387268

--- Comment #12 from Kåre Särs  ---
Do you get the same problem with this virtual scanner?

https://developer.dynamsoft.com/dwt/kb/2659

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #11 from hardy.pub...@gmail.com ---
Created attachment 109553
  --> https://bugs.kde.org/attachment.cgi?id=109553=edit
Debug Log

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #10 from hardy.pub...@gmail.com ---
Created attachment 109552
  --> https://bugs.kde.org/attachment.cgi?id=109552=edit
Scanner Installed OK.

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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https://bugs.kde.org/show_bug.cgi?id=387268

--- Comment #9 from hardy.pub...@gmail.com ---
I checked the DbgView log and there is no reaction to my clicking the "Import
>From Scanner". It's like the menu option doesn't trigger any event.

Also I'm not sure there's any problem in Windows now because it seems to
recognise my scanner OK. See picture attached.

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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--- Comment #8 from hardy.pub...@gmail.com ---
I see the Import -> Import From Scanner... menu option but absolutely nothing
happens.

I searched for some info and found some worrying comments on deprecated TWAIN
support in Windows in favour of WIA.

https://www.tenforums.com/drivers-hardware/46516-unable-open-twain-source-post629295.html#post629295

https://docs.microsoft.com/en-us/windows-hardware/drivers/image/twain-compatibility

Not sure if its relevant to this problem though.

I tried the solution posted here but no improvement:

https://www.tenforums.com/drivers-hardware/46516-unable-open-twain-source-post792019.html#post792019

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[libksane] [Bug 387268] Acquire Image Tool Not Found under Windows : Twain interface not ported to KF5

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https://bugs.kde.org/show_bug.cgi?id=387268

caulier.gil...@gmail.com changed:

   What|Removed |Added

Summary|Acquire Image Tool Not  |Acquire Image Tool Not
   |Found under Windows : Twain |Found under Windows : Twain
   |interface not port to KF5   |interface not ported to KF5

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