Re: [Openexr-devel] OpenEXR Data Channel Configurations

[Paul Schneider]

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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