Re: .jpg to .icns?
Re: .jpg to .icns?
- Subject: Re: .jpg to .icns?
- From: Jens Alfke <email@hidden>
- Date: Thu, 26 Jun 2008 22:44:03 -0700
On 26 Jun '08, at 1:22 PM, R.L. Grigg wrote:
One can only wonder why Xcode doesn't do this conversion for you
when you drag a .jpg into the icon well in the Info/Properties panel
for the target.
Because no one would start with a JPEG as their icon, since it doesn't
have an alpha channel. Who wants an opaque square icon? A PNG or TIFF
would make more sense. The conversion functionality is outsourced to a
separate app (IconComposer) to make the system more modular.
But I am curious. I know a .icns file contains multiple resolutions
etc but outside of Xcode I wasn't aware of any use for it. Everyone
I know has to convert an existing .jpg, .png, etc to .icns which
appears odd to a noob like me.
The .icns format predates Mac OS X. On the Classic OS it was more
important to support multiple resolutions because icons were often
shown at smaller sizes, because the graphics system didn't antialias
as well, and because the old visual style tended to use pixel-art,
which doesn't scale well, instead of antialiased images.
—Jens _______________________________________________
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