Re: Confusion about screen resolution
Re: Confusion about screen resolution
- Subject: Re: Confusion about screen resolution
- From: Gabriel Zachmann via Cocoa-dev <email@hidden>
- Date: Sun, 23 Feb 2020 00:42:47 +0100
> For Retina displays, the backing store's size is always 2x the size in points
> that Cocoa reports. The backing store is then scaled to the display's
> physical resolution.
>
> Also, even if though the default point-size-to-display-physical-pixels used
> to be 2x, remember that other scaling was always supported. The fact that
> the default has changed doesn't introduce a *new* problem. Apple always had
> to have a solution for this.
Sure, I am not saying it's new, nor am I saying it's a problem.
Obviously, the text rendering (without zooming in), is very crisp on my retina
display
(MacbookPro 15'' 2019, Touch Bar). I am looking at it with a magnifying glass.
I am just curious, how do they do that given the fact that they first render it
into a backing store and then scale it down by some very odd factor, which is
definitely not 2 or 1 or some other similar "easy" case. How is that I am not
seeing any resampling artefacts.
Bear in mind that text rendering is a pretty tricky business with all those
hinting, and kernings, and serifs, and what not.
Best regards, Gabriel
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