Re: -[CALayer setContents: cvPixelBufferRef ] ?
Re: -[CALayer setContents: cvPixelBufferRef ] ?
- Subject: Re: -[CALayer setContents: cvPixelBufferRef ] ?
- From: David Duncan <email@hidden>
- Date: Thu, 3 Apr 2008 12:23:59 -0700
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
email@hidden
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