Re: fast blitting with Quartz
Re: fast blitting with Quartz
- Subject: Re: fast blitting with Quartz
- From: Scott Thompson <email@hidden>
- Date: Fri, 28 Sep 2007 13:27:14 -0500
On Sep 28, 2007, at 12:53 PM, Wade Tregaskis wrote:
I suppose should be no problem to letting the size of the view grow
to infinity - as long as I'm not drawing any more of it. I guess I
just have to get over the mental hurdle.
Note that there is a practical limit to the size of an NSView,
beyond which all sorts of funkiness occurs (visible as drawing
artefacts) as a consequence of CoreGraphics using floats, and thus
having very much finite precision. It depends on your particular
code as to when exactly you'll see problems, but I wouldn't let any
view (inside a scrollview) get more than 10,000,000 pixels in any
dimension.
(I know that sounds huge, but it's pretty easy to naively hit if
you're not careful)
Are you sure about the magnitude of your dimension there? I was under
the impression (potentially mistaken) that the problems started around
10,000 (ten thousand) instead of 10,000,000 (10 million).
Scott
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