TIFF and LibTiff Mail List Archive


1999.06.03 19:48 "Large File Support", by Bruce Forsberg
1999.06.04 03:45 "Re: Large File Support", by Frank Warmerdam
1999.06.04 07:32 "Re: Large File Support", by Rob Tillaart
1999.06.04 18:35 "RE: Large File Support", by Bruce Forsberg
1999.06.10 09:48 "Re: Large File Support", by Klaus Bartz
1999.06.10 15:10 "Re: Large File Support", by Peter Smith
1999.06.14 11:16 "Re: Large File Support", by Martin Bailey

1999.06.03 19:48 "Large File Support", by Bruce Forsberg

I am investigating for our project what file formats support large images (ie > 2GB). I am not a TIFF expert but noticed that the TIFF 6.0 spec has a field in the Directory Entry structure called "count". Which is 4 bytes unsigned. This would seem to limit TIFF to an image size to something less than 4 GB. Is this correct?

For our UNIX machines (HP, SGI, SUN) we are compiling 32 bit applications and using the transitional API for accessing files > 2GB defined by the Large File Summit. Most of these are just the same calls with 64 added on (ie open is open64). I noticed that the tiff library does not use these. Will tiff be modified in the future for this or is 2GB the current limit of tiff for 32 bit compiles?

I am new to this mail list so if this has been discussed before I am sorry. I tried to retrieve an archive from the mail list but it never responded.


Bruce Forsberg
Marconi Integrated Systems