Dooble releases, Qt5 builds

[Martin Iturbide]

Hello Dave

OK, please test ftp://dry@ftp.os2voice.org/tmp/dooble-2024-01-09-Qt5.zip also need ftp://dry@ftp.os2voice.org/tmp/Qt5libs-2025-01-09.zip

I tried Dooble on Qt5 and works here as expected. I'm running it with the replaced files from "Qt5libs-2025-01-09.zip". What improvement does "Qt5libs-2025-01-09.zip" has? I just ask this because if it is working fine, it would be great to put those on the Qt5 rpm if there are no complains.

Regards

[Rich Walsh]

What improvement does "Qt5libs-2025-01-09.zip" has?

1- an improved method for displaying UTF-8 in the titlebar. Dooble enables this feature automatically.

To enable it in other QT apps (not necessarily a good idea) use this new environment variable:
    SET QT_UTF8=[ 1 |  Y | ON ]
(the old variable, "QT_PM_CP" has been abandoned)

2- composing characters using dead keys and AltGr should now work correctly.

[Dave Yeo]

Here's the patches. Note the Dooble patch was on top of Rich's previous fix, easy to see how it applies.
Also the otter-browser in the ftp's tmp directory has the same fix. The next drop of Qt6 that Paul does will have the same fix and that will enable the Qt6 version of Dooble that is in tmp to do the same.
Be good to have updated Qt5 qtbase RPM updated

[Paul Smedley]

I'll probably bump the bits of Qt 6.2 that can be, to 6.2.11 - maybe tomorrow and release that with the patches.

[Remy]

Hi !

(silent close)
I tried several times to open link:
ftp://ftp.pmoylan.org/Major/

Dooble QT5 as well QT6 are closing ! 

Regards
Rémy

[Dave Yeo]

Yes, something seems broken with the ftp protocol. Here with the Qt6 dooble, I got a blank page, Qt5 dooble closed.
Tried ftp://ftp.os2voice.org/dooble/ too, Qt6 dooble kept reverting to about:blank, Qt5 dooble gave me an error about the site not being reached.
Tried ftp://dry@ftp.os2voice.org/dooble/ and got a popup to enter user and password, after entering the info, dooble-qt5 vanished., dooble-qt6 gave a blank page.
These failures also don't get saved in the history, just the ftp://ftp.os2voice.org/dooble/ with the not found error got saved.
I'd guess the ftp problem is in the Qtwebengine.
OTOH, gopher works, eg gopher://magical.fish/

[Dave Yeo]

Tried the Qt5 simplebrowser, running in multi-process mode, ftp caused the tab to crash with the attached exceptq log. Almost seems to be icu related, code page problem?

[Remy]

An other issue where rendering is very very slow !
I compared firefox and Dobble (QT5 or QT6, similar result)
Using following link, page flip is very slow !
https://flipbook.octave.de/press/PR_V80SE_SOUND+IMAGE_201802_AU/#p=4

[Dave Yeo]

Yes. Skia, which Qtwebengine uses, seems much slower then Cairo at drawing the canvas. Cairo's OS/2 surface is meant for 2D acceleration while Skia likely expects 3d acceleration. Skia might be able to be tuned for faster rendering on our platform but looking, the main reason it is faster is it uses the GPU rather then the CPU like Cairo. That seems to be the reason that most everyone has moved to Skia. Even our Firefox has a configure option to use Skia and does on Windows and Mac.