Oopsie, I found this mail in my drafts folder just now, where it’s been 
sitting since the ninth. Perhaps I had to pause writing, but now I can’t 
remember anymore. So I’ll just send it off. ;-)


Am Tue, Jul 09, 2024 at 12:02:47AM +0100 schrieb Michael:

> On Monday, 8 July 2024 21:21:19 BST Frank Steinmetzger wrote:
> > Am Mon, Jul 08, 2024 at 06:26:26PM +0100 schrieb Michael:
> > > Back to the previous topic, I have not yet found a case where changing the
> > > scale by means of the desktop settings, arrives at non-blurred fonts.  The
> > > clearest sharpest fonts are always rendered at the native monitor
> > > resolution, at a 100% scale setting.  Am I missing a trick, or is this to
> > > be expected?
> > That doesn’t really make sense. Fonts are always rendered natively, no
> > matter what size. Except if they are really rendered at 100 % and then the
> > rendered bitmap is scaled by the GPU or somesuch.
> > 
> > Or because their hinting information is limited to a certain size range.
> > This info gives the renderer special knowledge on how to render the glyphs.
> > 
> > Do you have screenshots?
> 
> I attach two screenshots one at 100% and one at 90%.  When viewed on the 
> 1366x768 actual monitor they are worse than what the screenshots have 
> captured.  Perhaps I need to take a photo of the monitor.  Anyway, if you 
> view 
> it on a 1920x1080 monitor you should hopefully see the difference.  The font 
> DPI is 96.

I can see it. I use 2560×1440, but viewing an image pixel-perfect is not 
dependent on the screen’s resolution per se, but on it being run at its 
native resolution. So that one pixel in the image is actually displayed by 
one pixel on the screen without any scaling-induced blurring.

I have no real explanation for the fonts. Do they also get blurry at scales 
bigger than 100 %? The only thing I can say is that I use a font setting of 
slight hinting with no RGB subpixel rendering. The latter means that I don’t 
want the coloured fringes, but prefer greyscale aliasing instead. See my 
screenshot. 96 dpi (100 % scaling), main fonts set to 11 pt.

I used to use full hinting in my early (KDE 3) days, which gives me sharp 
1-pixel-lines, because I was used to the crisp look of non-aliased fonts on 
Windows. But for many years now I’ve been using only slight hinting, so the 
font looks more “real-worldy”, natural and not as computer-clean. I think 
that’s something I picked up during the few times I looked at a mac screen 
or screenshot (I’ve never sat at one for a longer time myself).


PS.: Do you really still use KDE 4 or is it just Oxygen on Plasma 5? I kept 
using Oxygen Icons in Plasma 5. But more and more icons are not updated, so 
I get wrong icons or placeholders, so I bit the bullet and switched to 
breeze. :-/
On second thought, I think I can answer that myself, because the blurred 
icons give it away. With Plasma 6, the global scaling not only affects fonts 
but also the entire UI. I wish this could be disabled, because that is the 
actual reason why I can’t keep on using custom DPI setting any longer. The 
UI just becomes ugly with far too much spacing and those blurry icons.

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