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August 2007

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2007.08.22 06:13 "How to handle big single-strip images?", by Oliver Geisen

2007.08.22 09:36 "Re: How to handle big single-strip images?", by <jcupitt@gmail.com>

2007.08.22 12:19 "Re: How to handle big single-strip images?", by Toby Thain

2007.08.22 13:58 "Re: How to handle big single-strip images?", by <jcupitt@gmail.com>

2007.08.22 13:00 "Re: How to handle big single-strip images?", by Gerben Vos

2007.08.22 22:03 "Re: How to handle big single-strip images?", by Leonardo Serni

2007.08.22 13:00 "Re: How to handle big single-strip images?", by Gerben Vos

Oliver Geisen wrote:

> i wonder what will happen if one opens an tiff image where all the
> data is in a SINGLE strip (some writers offer this option) and also
> compressed (G4) and someone tries to use TIFFReadScanline with it?
> I would expect that libtiff needs to read the whole strip, because
> it's compressed, into memory. Or is it possible to read compressed
> data by chunks?

libtiff can decompress data by chunks that are multiples of a scanline.

This may depend on the compression type, but it's definitely supported
for CCITT, LZW, ZIP and JPEG.

					Gerben Vos.