[kupan787]

How does Preview do it? If you open an image in preview, you have the option to turn on anti-aliasing. I would love to do this in my app (an image in my app looks horrid compared to opening it in preview).

And before you ask, I am not writing a competitor to Preview, I just want my users have the option of viewing the received pdf files inside my program rather than having to go to another program.

[Rickster]

I think NSImageView provides the highest level of smoothing for resized images by default, but in case I'm wrong (or if you'd like to have a lower level of smoothing)...

Subclass NSImageView and override -drawRect:. Call [[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh] (or Medium or Low or Default) and then call super. That's it.