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> > The second problem involves this same section of code (1-32 bit sample...
>
> I'll stay out of this issue, though I suspect that 24bit data should not
> be byte swapped.

The latest libtiff does byte-swap 24-bit data because Chris Cox at 
Adobe claims that this is what the TIFF specification implies and 
because it is necessary to read/write the new 24-bit floating format 
from Adobe Photoshop CS2.  I must admit to being dubious about this 
claim, and I believe that Joris is as well.  But if Adobe Photoshop 
CS2 does it, by-golly it must be right!

The 24-bit sample file is not byte-swapped because libtiff was not 
swapping at the time.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/


AWARE [SYSTEMS]		Imaging expertise for the Delphi developer
		TIFF and LibTiff Mailing List Archive
	LibTiff Mailing List TIFF and LibTiff Mailing List Archive October 2005 Previous Thread Next Thread Previous by Thread Next by Thread Previous by Date Next by Date Contact The TIFF Mailing List Homepage This list is run by Frank Warmerdam Archive maintained by AWare Systems	Thread 2005.10.27 06:40 "How located pixels with BitsPerSample not bound to byte?", by Eugene Shebeko 2005.10.27 13:57 "Re: How located pixels with BitsPerSample not bound to byte?", by Frank Warmerdam 2005.10.28 03:18 "Re: How located pixels with BitsPerSample not bound to byte?", by David Mckenzie 2005.10.28 03:42 "Re: How located pixels with BitsPerSample not bound to byte?", by Frank Warmerdam 2005.10.28 04:08 "Re: How located pixels with BitsPerSample not bound to byte?", by Bob Friesenhahn 2005.10.28 04:21 "Re: How located pixels with BitsPerSample not bound to byte?", by Chris Cox 2005.11.07 19:18 "Re: How located pixels with BitsPerSample not bound to byte?", by Joris Van Damme 2005.11.07 20:26 "Re: How located pixels with BitsPerSample not bound to byte?", by Bob Friesenhahn 2005.11.09 05:00 "Re: How located pixels with BitsPerSample not bound to byte?", by Chris Cox 2005.11.13 18:05 "Re: How located pixels with BitsPerSample not bound to byte?", by Andrey Kiselev 2005.10.27 15:55 "Re: How located pixels with BitsPerSample not bound to byte?", by Bob Friesenhahn 2005.10.28 04:08 "Re: How located pixels with BitsPerSample not bound to byte?", by Bob Friesenhahn > > The second problem involves this same section of code (1-32 bit sample... > > I'll stay out of this issue, though I suspect that 24bit data should not > be byte swapped. The latest libtiff does byte-swap 24-bit data because Chris Cox at Adobe claims that this is what the TIFF specification implies and because it is necessary to read/write the new 24-bit floating format from Adobe Photoshop CS2. I must admit to being dubious about this claim, and I believe that Joris is as well. But if Adobe Photoshop CS2 does it, by-golly it must be right! The 24-bit sample file is not byte-swapped because libtiff was not swapping at the time. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/

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2005.10.28 04:08 "Re: How located pixels with BitsPerSample not bound to byte?", by Bob Friesenhahn