Digikam-users Digest, Vol 247, Issue 16

Tue Dec 9 22:05:22 GMT 2025

> VCPKG has the last openCV now through this MR :
>
> https://github.com/microsoft/vcpkg/pull/48696

> Best regards
>
> Gilles

Awesome, thank you Gilles!

I'll follow these upstream issues, keep an eye on DigiKam 8.9.0's NEWS log, and pick up testing after Christmas when I see OpenCV 4.12 listed in the bundled component table for Windows.

Bryan

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Today's Topics:

   1. Re: Nvidia 2070 Super supported for OpenCL? (Gilles Caulier)
   2. Re: Nvidia 2070 Super supported for OpenCL? (Gilles Caulier)

----------------------------------------------------------------------

Message: 1
Date: Tue, 9 Dec 2025 04:33:37 +0100
From: Gilles Caulier <caulier.gilles at gmail.com>
To: "digikam-users at kde.org" <digikam-users at kde.org>
Subject: Re: Nvidia 2070 Super supported for OpenCL?
Message-ID:
        <CAHFG6sFz3sJKzGAKu7PbNTJ1XE8KCpwhm51JYmsJ1PYbT6wmPQ at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Hi,

VCPKG has the last openCV now through this MR :

https://github.com/microsoft/vcpkg/pull/48696

Best regards

Gilles

Le dim. 7 déc. 2025 à 17:14, Gilles Caulier <caulier.gilles at gmail.com> a écrit :
>
> Le dim. 7 déc. 2025 à 02:56, bryan at gillson.net <bryan at gillson.net> a écrit :
> >
> > Please see my response after the quoted thread below:
> >
> > Gilles:
> > > >> > Under Windows we package with an older release of OpenCV framework in
> > > >> > charge of to deal and to use the GPU for the computation. This is
> > > >> > probably the problem. This is due to a UPSTREAM bug in the VCPKG
> > > >> > package manager.
> > > >>
> >
> > Bryan:
> > > >> Thanks Gilles. Is this something I can manually correct?
> > > >>
> > > >> I've downloaded the latest OpenCV (v4.12) but it now deploys with only the unified opencv_world412.dll and not
> > > >> the individual opencv_core4*.dll, opencv_imgcodecs4*.dll, etc. that digiKam bundles. Consequently, it doesn't
> > > >>look like I can just copy the updated .dlls to the digiKam directory.
> >
> > Gilles:
> > > > No you cannot. openCV must be compiled with the right open trough
> > > > VCPKG installer and digiKam must be recompiled and linked with it.
> > > > This is a huge task that I do in a Windows 10 VM with all the
> > > > necessary dependencies.
> >
> > Bryan:
> > > Has the change you referenced below been made in 8.9.0, and if so, is 8.9.0 stable enough for testing on a
> > >  production photo library? Please let me know if there is a bug I could track instead; I did check but did not
> > > find one.
> >
> > Gilles:
> > > Yes, 8.9.0 is a bugfix release
> >
> > Bryan (new):
> >
> > Thanks for the response. However, I'm asking specifically about whether 8.9.0 for Windows includes the update to OpenCV, or still plans to.
>
> Nothing is done for the moment. OpenCV and Qt are older releases in
> VCPKG packages manager. There are many build failures in the VCPKG CI
> to bump the versions. I am waiting for progress here (typically open
> source developers are more available during holidays, we will see at
> Christmas time...
>
> Best
>
> Gilles Caulier

------------------------------

Message: 2
Date: Tue, 9 Dec 2025 07:04:37 +0100
From: Gilles Caulier <caulier.gilles at gmail.com>
To: "digikam-users at kde.org" <digikam-users at kde.org>
Subject: Re: Nvidia 2070 Super supported for OpenCL?
Message-ID:
        <CAHFG6sFnnOLbrpkWpWjz9L6z72Zg1T7v+dYXYWNmWYkvh+soDw at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Qt 6.10.1 is under way in VCPKG too. I will also wait for this one
before rebuilding all Windows packaging from scratch in the digiKam
Windows VM... I hope that all will be ready for Christmas

Best regards

Gilles

Le mar. 9 déc. 2025 à 04:33, Gilles Caulier <caulier.gilles at gmail.com> a écrit :
>
> Hi,
>
> VCPKG has the last openCV now through this MR :
>
> https://github.com/microsoft/vcpkg/pull/48696
>
> Best regards
>
> Gilles
>
> Le dim. 7 déc. 2025 à 17:14, Gilles Caulier <caulier.gilles at gmail.com> a écrit :
> >
> > Le dim. 7 déc. 2025 à 02:56, bryan at gillson.net <bryan at gillson.net> a écrit :
> > >
> > > Please see my response after the quoted thread below:
> > >
> > > Gilles:
> > > > >> > Under Windows we package with an older release of OpenCV framework in
> > > > >> > charge of to deal and to use the GPU for the computation. This is
> > > > >> > probably the problem. This is due to a UPSTREAM bug in the VCPKG
> > > > >> > package manager.
> > > > >>
> > >
> > > Bryan:
> > > > >> Thanks Gilles. Is this something I can manually correct?
> > > > >>
> > > > >> I've downloaded the latest OpenCV (v4.12) but it now deploys with only the unified opencv_world412.dll and not
> > > > >> the individual opencv_core4*.dll, opencv_imgcodecs4*.dll, etc. that digiKam bundles. Consequently, it doesn't
> > > > >>look like I can just copy the updated .dlls to the digiKam directory.
> > >
> > > Gilles:
> > > > > No you cannot. openCV must be compiled with the right open trough
> > > > > VCPKG installer and digiKam must be recompiled and linked with it.
> > > > > This is a huge task that I do in a Windows 10 VM with all the
> > > > > necessary dependencies.
> > >
> > > Bryan:
> > > > Has the change you referenced below been made in 8.9.0, and if so, is 8.9.0 stable enough for testing on a
> > > >  production photo library? Please let me know if there is a bug I could track instead; I did check but did not
> > > > find one.
> > >
> > > Gilles:
> > > > Yes, 8.9.0 is a bugfix release
> > >
> > > Bryan (new):
> > >
> > > Thanks for the response. However, I'm asking specifically about whether 8.9.0 for Windows includes the update to OpenCV, or still plans to.
> >
> > Nothing is done for the moment. OpenCV and Qt are older releases in
> > VCPKG packages manager. There are many build failures in the VCPKG CI
> > to bump the versions. I am waiting for progress here (typically open
> > source developers are more available during holidays, we will see at
> > Christmas time...
> >
> > Best
> >
> > Gilles Caulier

------------------------------

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