Hi, Angus,
the RGBA interfaces exist as conveniences, for developers who don't
need to support aux channels. If you have an application that can
understand more than RGBA, then you shouldn't use the RGBA
interfaces; instead, use InputFile and OutputFile to get all of the
channels, and examine the Header to see which channels exist. I can
send you some sample code offline if you wish.
I imagine that RGBA+aux EXRs will become more and more common, as
studios move to a deep-buffer workflow, but this of course will vary
from facility to facility.
- Paul
On Nov 12, 2004, at 12:55 PM, 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.
Thanks,
Angus
------------------------------------
Angus Taggart
Apple R&D, Santa Monica
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