Originally Posted by Daphoid
Photoshop aside, I just want to get some clarification.
This is going to be a user adjustable setting like it is in Windows? Where for example if you up things to 120 DPI (or "Large Fonts" as Windows Calls it) everything gets bigger? fonts, titlebars, etc?
Except unlike Windows, OS X will do a pretty job with it?
I run Windows at 192 DPI. I'm visually impaired so this allows everything to be readable and huge, but still run my LCD's at their native resolution of 1600x1200 (I tried 800x600 @ 96dpi, but everything was fuzzy [as to be expected]).
This is the *one* setting OS X doesn't have over Windows (yet), so if this is what Apple Insider is talking about, Apple has another customer
RI is very different. You can raise the size of the fonts in OS X as well, but that doesn't equate to RI.
RI is the ability to change the rez of the entire screen. In other words, everything will change in size equally.
But, it also changes the size of everything by interpolating it into a higher rez object. This is done by having most factors being composed of vector calculations, rather than using bitmaps.
Fonts are done this way now, which is why they look better, the larger they are. Icons on the Mac are done the same way (well, almost). There is interpolation going on. But, there is more than one size for the icon. Interpolation can average out the detail when changing sizes. Try to change the size of the screen icons by going to prefs. You'll see that they remain sharp. Possibly seeming to gain in detail.
RI will do that to most all elements of the desktop, or programs within, if they are rewritten to take advantage of it.
Pixel papped objects, such as photo's, are different. They can be interpolated as PS does it, but past a certain size, they lose sharpness. The memory required to store larger versions becomes immense.
Going the other way, that is, from "normal" to a smaller apparent screen rez, is the opposite, less memory would be required for bit mapped graphics.
Apple has modes that can give an idea of how this works, in an imperfect way.
You can go to Sys Prefs/Unlversal Access, and turn Zoom on. Follow the options. As I say, it isn't the same, but you will get some idea.