How to draw a CGImage object to a NSView?

FROM : Leopard x86
DATE : Wed Feb 20 23:21:31 2008

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.