Re: -[CALayer setContents: cvPixelBufferRef ] ?

FROM : David Duncan
DATE : Thu Apr 03 21:23:59 2008

On Apr 3, 2008, at 11:34 AM, Jonathan del Strother wrote:

> CALayer says that 'contents' is "typically a CGImageRef, but may be
> something else".  I (optimistically) tried assigning the
> CVPixelBufferRef directly to the contents, but apparently that's not
> included in the mysterious 'something else' list.


Could you point out where it says that? Typically you would set the 
contents property either as a CGImageRef, or as the value of the 
contents of another layer (which would cause them to share contents).

> The only way I've found of going from CVPixelBufferRef to CGImageRef
> is via CIImage, something like the following :



If you have a CVPixelBufferRef, you can use the various functions 
defined for a CVPixelBuffer to access the base address, row bytes, 
width, height and other attributes to create a CGImageRef directly 
from it via CGImageCreate(). You should be able to find more 
information by consulting the CoreVideo and Quartz references.
--
David Duncan
Apple DTS Animation and Printing
david.<email_removed>