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

FROM : Ken Ferry
DATE : Wed Feb 20 23:34:50 2008

..not that you need to do this if you already have a custom view
subclass.  Then you should just draw the CGImage from within drawRect,
as glenn described.

-Ken

On Wed, Feb 20, 2008 at 2:29 PM, Ken Ferry <<email_removed>> 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.
>
>  -Ken
>
>
>
>  On Wed, Feb 20, 2008 at 2:21 PM, Leopard x86
>  <mailinglist.<email_removed>> wrote:
>  > Hi everyone.
>  >  After reading the Quartz Graphics programming document, I am still
>  >  trying to find a method to draw a CGImageRef object "directly" to a
>  >  NSView / NSOpenGLView ...
>  >
>  >  My application decodes some files on the disk to into CGDataProvider,
>  >  then uses the CGDataProviders to create CGImageRefs. I think it will
>  >  cost too much performance to convert the CGImage objects to other
>  >  formats, e.g. NSImage, CIImage. So I am wondering a direct way to draw
>  >  CGImage to a NSView or NSOpenGLView.
>  >
>  >  Can anyone give me a suggestion? Thank you very much in advanced.
>  >  Good Luck.
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