Re: Core Animation geometry, layer hosting, and resolution independence
Re: Core Animation geometry, layer hosting, and resolution independence
- Subject: Re: Core Animation geometry, layer hosting, and resolution independence
- From: Quincey Morris <email@hidden>
- Date: Wed, 12 Mar 2008 16:05:02 -0700
On Mar 12, 2008, at 14:49, Nathan Vander Wilt wrote:
I don't understand what this "base" coordinate system
is (not the window's, otherwise the conversions would
likely be offset by the view's position therein,
right?). But whatever it is, it seems to be shared by
the CALayer. I'd appreciate a greater understanding of
all this, but those functions seem to be necessary for
any coordinate work in the layers that needs to relate
to the NSView world.
All I know is what's in the release notes. They seem to be using
"base" to mean "whatever is providing the pixel grid". In the case of
normal views, this is the screen (hence the well-known window to/
fromBase conversion). In the case of layer backed views, it means the
backing store. So it sort of makes sense.
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