Re: [Openexr-devel] OpenEXR Data Channel Configurations

[Florian Kainz]

Not really fat, but better than nothing:  The OpenEXR sample images contain
two files with R, G, B, A and Z channels, one with scan lines and one with
tiles: ScanLines/Blobbies.exr and Tiles/Spirals.exr.

By the way, you can use the exrmaketiled utility program (included in
the OpenEXR distribution) to make tiled images from scan-line images.
Type "exrmaketiled -h" to see a list of command line options.

Florian


Angus Taggart wrote:
> Thanks everyone for the feedback to my question.
>
> At this point, it would be very helpful if we could get some 'fat' EXR's 
> to do some testing with (i.e. RGBA+aux image data).  Ideally, we'd like 
> to get a hold of a file in which the image data is stored in scanlines 
> and a file in which the image data is stored in tiles.
>
> Thanks,
> Angus
>
> ------------------------------------
> Angus Taggart
> Apple R&D, Santa Monica
>
>
> On Nov 15, 2004, at 2:37 AM, Ciaran Wills wrote:
>
> > On Fri, 2004-11-12 at 20:55, Angus Taggart wrote:
> >
> > > Hi,
> > >
> > > Is it common for facilities to create OpenEXR files that contain both
> > > standard RGBA data and auxiliary data channels (e.g. normal vector data
> > > and motion vector data)?  The reason that I ask is that the OpenEXR
> > > library provides specialized classes for handling scanline and tiled
> > > RGBA files and I was wondering what the recommended approach would be
> > > to handling files that contain RGBA+aux data.
> >
> >
> > Hi Angus,
> >
> > We've started using 'fat' EXRs on some projects, mainly as it simplifies
> > the asset tracking and versioning process.  Our EXR Shake plugin lets
> > you choose which channels to load (defaulting to RGBA if they are
> > present).
> >
> > I expect fat EXRs will become more common - several people here have
> > expressed a preference for working this way if all the relevant tools
> > support it.
> >
> > Ciaran.
>
>
>
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