Re: [Openexr-devel] Null data window

[Ciaran Wills]

On Wed, 2005-03-02 at 19:56, Florian Kainz wrote:

> Right now, the library won't let you save or load
> a file with no pixels in it.  Adding this capability
> wouldn't be too difficult; we'd just have to do a lot
> of testing to ensure that empty files don't break
> anything.
> 
> Why do you need image files with no pixels?

We post-process renders to set the data window to bound the non-black
region of the frame.  It saves a little bit of disk space and makes life
much easier in compositing as the images come into Shake with their DODs
already set.

I have been setting the data window to a 1x1 black pixel but we hit a
bug in Shake concerning small DODs, so I was just wondering if there was
a way to explicitly mark the file as empty.