2003.12.31 11:40 "Re: [Tiff] problems with custom TIFF", by Andrey Kiselev

> > size = TIFFReadEncodedStrip(tif, strip, bufRGB, (tsize_t)-1);

> Why do you using -1 here? It should be a size of bufRGB in bytes.

I read the libtiff tutorial which suggests using (tsize_t)-1) as it will read in the whole tile/strip by default. It seems to work okay for me.

Oh, it seems to be missed in the manual pages... Fixed.

I'm now writing out the extrasamples tag but still IMAGINE can't open the file for viewing.

This is how I get/set in the tags is this correct?

 TIFFGetField(tif, TIFFTAG_EXTRASAMPLES, &tags->extra, &tags->extraTypes);
 TIFFSetField(wtif, TIFFTAG_EXTRASAMPLES, wtags.extra, wtags.extraTypes);

Where tag members are:

   uint16 extra;
   uint16 *extraTypes;

I think you don't need to do something with extrasamples in output image. But don't forget to set TIFFTAG_SAMPLEFORMAT correctly:

 TIFFSetField(out, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP);

Andrey

Andrey V. Kiselev
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