Qt4/KDE4 software under 10.14

[Richard L. Hamilton]

What "them"?  The KDE folks?  Apple?  I thought Qt4/KDE4 was unsupported.

I gather Qt4 has -graphicssystem { native |  raster | opengl }

If I just run

open -a kshisen

it blinks.  (that's the shell open command, which with -a is invoking the Mac app bundle whose name follows)


If I run

open -a kshisen --args -graphicssystem raster

(what's after --args is passed to the binary within the app bundle as command line arguments without being interpreted by the app launcher)
it also blinks.


If I run

open -a kshisen --args -graphicssystem native

it does NOT blink - at first glance, it looks fine.

If I run

open -a kshisen --args -graphicssystem opengl

then text appears, but all the graphics are blank until I move the window (!), at which time it's fine.

Seems like it may be using the raster option as a default, even if Qt4-mac is not built with the +raster variant.  That may be at the level of the configure script doing that now, I don't know, haven't dug that far, never looked at Qt4 internals before.

Supposedly raster could have been faster than native on some platforms, so I suppose I can see that it might have become the default.  But I don't see that native was slow, although kshisen is not demanding, and I may not have run it before on this relatively new hardware back on High Sierra, so I might not notice speed anyway.

> On Oct 11, 2018, at 04:04, René J.V. Bertin <rjvbertin at gmail.com> wrote:
> 
> On Thursday October 11 2018 01:37:51 Richard L. Hamilton wrote:
> 
>> https://github.com/macvim-dev/macvim/issues/751
>> 
>> I have no idea if it's really the same underlying cause to the KDE4 graphics issues vs MacVim, but they both are not handling display updating correctly from the looks of it.
> 
> It does sound likely, and one has to hope Apple didn't introduce a whole bunch of incompatibilities. It could be interesting to see if Qt4 has a similar option to avoid CoreText rendering.
> FWIW, Qt5 does since 5.7 or so; it can use Freetype+FontConfig. I patched that code a bit so it becomes possible to set this as the default text renderer without tweaking each and every command line, and have been using it all the time. FreeType+Infinality does a better rendering job, and text now looks the same on Mac and under X11 (in Qt5 apps).
> 
> BTW, has this been reported to them (and did they respond with anything other than "works as intended" or "please install the latest release")?
> 
> R.
>