Re: font size
Re: font size
- Subject: Re: font size
- From: Andreas Mayer <email@hidden>
- Date: Thu, 13 Sep 2012 21:24:36 +0200
Am 13.09.2012 um 20:26 schrieb Jens Alfke <email@hidden>:
> Nope. There’s a scale factor in the transformation from user coordinates to device coordinates, and it can be set to arbitrary values (although the Display system pref panel only gives you access to five of them, one of which is 2.0.)
>
> The QuartzDebug app, which has been around for years, lets you set the scale factor to whatever you want.
I know that, of course. But is that what is actually happening when you set the resolution on a retina MacBook to something else than x1 or x2?
We've had resolution independence build in to the OS for years. But it was never actually used because many applications didn't handle fractional scale values correctly. I thought the move to @2x (like in iOS) was a way around that problem.
I don't think I can test this without the actual hardware because using 'simulated' HiDPI will always just double the resolution (i.e. I get a display half the logical size with two times as much pixels per point in each direction).
Here is a quote from arstechnica regarding this topic:
http://arstechnica.com/apple/2012/06/pixelpalooza-ars-reviews-the-15-retina-macbook-pro/3/
"Apple warns that selecting other scaling options may affect performance, but we didn't run into any hiccups in our testing. The reason for the warning is sound, however. Apple creates a virtual screen at double the resolution of whatever non-Retina setting you choose, draws the screen image, and then that is scaled to the 2880x1800 screen."
Andreas
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