Re: Replace -lockFocus with Block-Based Drawing Method (was NSCustomImageRep…)
Re: Replace -lockFocus with Block-Based Drawing Method (was NSCustomImageRep…)
- Subject: Re: Replace -lockFocus with Block-Based Drawing Method (was NSCustomImageRep…)
- From: Jerry Krinock <email@hidden>
- Date: Wed, 17 Dec 2014 08:30:07 -0800
> On 2014 Dec 17, at 05:59, Ken Thomases <email@hidden> wrote:
>
> When you draw a single time using -lockFocus, your image can only be appropriate for one or the other. So, it will either be drawn at standard resolution, in which case it will look fuzzy or blocky on a high-resolution screen; or it will be drawn at high resolution, in which case it will waste RAM/VRAM and rendering work if it's only going to be displayed on a standard-resolution screen. It might also be very slightly less sharp than it would otherwise have been. It will be down-sampled to display on the standard-resolution screen, which usually works pretty well (especially at a 2:1 ratio) but does have some effect.
Excellent, Ken. I just submitted Feedback on the "High Resolution Guidelines for OS X”, suggesting that the relevant text be replaced with yours.
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