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

FROM : Ken Ferry
DATE : Wed Feb 20 23:29:01 2008

> 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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