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Re: NSBitmapImageRep byte/color component ordering

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Re: NSBitmapImageRep byte/color component ordering

Subject: Re: NSBitmapImageRep byte/color component ordering
From: Benjamin Stiglitz <email@hidden>
Date: Thu, 1 Nov 2007 11:33:25 -0700

If you're certain that the data you're seeing is BGRA, where are you
getting it from?


An NSImage, -TIFFRepresentation.  (The NSImage was created with
-initFromContentsOfURL:.)  Note that this source NSImage displays
correctly in a NSImageView.  No, I'm not 100% sure it's BGR, but
that's the only explanation I can come up with for the blue and red
colors being reversed when I copy the pixels to the new imgrep (which
presumably expects ARGB/RGBA only).  Gonna start sampling known pixels
from the input to see what's going on.


Uncompressed TIFFs are BGR. Try -[NSBitmapImageRep initWithData:].

-Ben
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Re: NSBitmapImageRep byte/color component ordering
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References:  
  >Re: NSBitmapImageRep byte/color component ordering (From: Alastair Houghton <email@hidden>)
  >Re: NSBitmapImageRep byte/color component ordering (From: "Brian Tarricone" <email@hidden>)




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