How to set the smallest possible clipping area before calling CGContextBeginTransparencyLayer ?

Posted by mystify on Stack Overflow See other posts from Stack Overflow or by mystify
Published on 2010-04-23T21:19:24Z Indexed on 2010/04/23 21:23 UTC
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iphone

Apple says:

Tip: For best performance, make sure that you set the smallest possible clipping area for the objects in the transparency layer prior to calling CGContextBeginTransparencyLayer.

Sounds good, but how would I set that clipping area to the thing which I want to draw transparent?

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Developer IT

How to set the smallest possible clipping area before calling CGContextBeginTransparencyLayer ? - Developer IT

How to set the smallest possible clipping area before calling CGContextBeginTransparencyLayer ?

iphone

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