Re: NSBitmapImageRep and 0RGB data
Re: NSBitmapImageRep and 0RGB data
- Subject: Re: NSBitmapImageRep and 0RGB data
- From: "John C. Randolph" <email@hidden>
- Date: Fri, 28 Jun 2002 11:30:08 -0700
On Thursday, June 27, 2002, at 10:39 AM, Chris Hanson wrote:
If you tell an instance of NSBitmapImageRep to init with data
planes etc. a 32 bpp image using a color space of
NSDeviceRGBColorSpace, it normally expects image data in RGBA
order. I have 0RGB data. Right now I'm munging the data into
RGBA before creating an NSBitmapImageRep, but I think I'm
probably doing a bit too much work. (I also haven't optimized
it for AltiVec, so it's relatively slow.)
Is there a color space constant I can pass that will let
NSBitmapImageRep know my data is in 0RGB order, and let it do
the conversion itself? Or is there some other mechanism I
should use?
NSBitmapImageRep has no provision for pixel data in 0RGB order,
but this sounds like a perfect Altivec permute opportunity.
-jcr
John C. Randolph <email@hidden> (408) 974-8819
Sr. Cocoa Software Engineer,
Apple Worldwide Developer Relations
http://developer.apple.com/cocoa/index.html
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