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Re: How to draw a CGImage object to a NSView?

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Re: How to draw a CGImage object to a NSView?

Subject: Re: How to draw a CGImage object to a NSView?
From: Jim Correia <email@hidden>
Date: Wed, 20 Feb 2008 18:26:27 -0500

On Feb 20, 2008, at 5:29 PM, Ken Ferry wrote:

I think it will cost too much performance to convert the CGImage objects to other formats, e.g. NSImage, CIImage.
It isn't very expensive to make an NSImage from a CGImage.  If you
create an NSBitmapImageRep with -initWithCGImage:, the
NSBitmapImageRep will just reference the CGImage and draw it when
necessary.  There is no conversion of the data.

It is worth pointing out that an NSBitmapImageRep created in this way is dependent on the CGImage - the CGImage's lifetime must be at least that of the dependent bitmap image rep.

http://lists.apple.com/archives/cocoa-dev/2008/Jan/msg01474.html

http://lists.apple.com/archives/cocoa-dev/2008/Jan/msg01481.html

- Jim

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Re: How to draw a CGImage object to a NSView?
From: "Ken Ferry" <email@hidden>


References:  
  >How to draw a CGImage object to a NSView? (From: Leopard x86 <email@hidden>)
  >Re: How to draw a CGImage object to a NSView? (From: "Ken Ferry" <email@hidden>)




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