Re: Confusion about screen resolution
Re: Confusion about screen resolution
- Subject: Re: Confusion about screen resolution
- From: Sandor Szatmari via Cocoa-dev <email@hidden>
- Date: Sat, 22 Feb 2020 12:37:21 -0500
> On Feb 22, 2020, at 12:30, Ken Thomases via Cocoa-dev
> <email@hidden> wrote:
>
> On Feb 22, 2020, at 9:02 AM, Gabriel Zachmann via Cocoa-dev
> <email@hidden> wrote:
>>
>>>
>>> No, the default on recent Macs is scaled to slightly under 2x.
>>>
>>
>> It is about ~ 1.7 .
>>
>> this means that every view has to be scaled by this odd factor, before
>> writing its contents into the frame buffer.
>> I am curious as to why that doesn't cause any aliasing artefacts, or
>> anti-aliasing artefacts ...
>
> 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.
Does it make sense that starting at 1.7 gives you a 0.3 headroom for ‘zoom’
without having to upsample?
Sandor
>
> Regards,
> Ken
>
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