On Mon, 11 Aug 2008, alexander johnson wrote:
> Im trying to support images between 2gb and 4 gb. I've seen some
> reference to this in previous posts but I'm still unsure how to enable
> these larger files. From what I can tell offset needs to be set to
> unsigned to enable this. Is there anything else I need to do? Is
> there a particular version of libtiff I need to use to do this? I
> looked at 3.8.2 and it doesnt seem to have any of the functions
> required to support the larger files eg fseek64. Older versions like
Since you mention fseek64, I assume that you are using some sort of a
Unix system. The large file standard for Unix provides a means
whereby the existing file access API can be promoted to 64-bit (if
necessary) via a pre-processor define so no application source changes
are needed.
All of the modern 'configure' based libtiff's automatically enable
large file support, and provide the option --disable-largefile in case
you won't want it.
Some Unix systems don't need special large file support since they use
a 64-bit file offset by default.
If you are using a Windows system, then I understand that it is useful
to build with the libtiff Windows file I/O module rather than the Unix
one. Windows stdio does not support large files.
Bob
======================================
Bob Friesenhahn
bfriesen@...,
http://www.simplesystems.org/users/bfriesen/GraphicsMagick Maintainer,
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