On 2024-07-24 13:59, Martin Steigerwald wrote:
> Martin Steigerwald - 24.07.24, 13:48:57 CEST:
>> I will tell Krita to open up a 100000x100 pixel image… that way X
>> coordinates would exceed 16 bit, while memory usage could still
>> be low enough.
>
> Interesting… very interesting:
>
> Both 100000x100 pixels and 100x100000 pixels worked out of the box.
> Instantly. I was able to scroll around and paint into several areas of the
> image and scroll back to it to see whether what I painted is still there.
>
> It saved out as Krita document and PNG image.
>
> Gwenview opened the 100000x100 PNG image instantly. And just fine.
> I was able to zoom into and scroll.
>
> Gwenview also opened the 100x100000 PNG image, but I did not see any
> of what I painted. Not sure what is going on there.
>
> Actually I do not even know how well PNG format would cope with dimensions
> like this. But it did not have any write error or any error message about
> exceeding some format based limits.
>
> Of course that does not yet prove whether all of KDE based software can
> exceed 16 bit for pixel coordinates. And whether you could set a display
> or screen to such a resolution.
>
> But at least Krita and (partly?) Gwenview is able to work with beyond 16
> bits for pixel coordinates.
>
> Enough crazy testing for now. Feel free to do more research on it. I
> wanted to do something else still, today. :)
>

Martin, that is some impressive "going down the rabbit hole" debugging
you did. I wonder if other viewports have the same issue. For example, a
big PDF in Okular or big web page in Falkon.

I'm not willing to crash my workstation today. heh...