Re: [Openexr-devel] requesting a specific layer/view from a part?

[Paul Miller]

On 6/17/2014 12:55 PM, Gonzalo Garramuno wrote:
> On 17/06/14 13:56, Paul Miller wrote:
> > I'm adapting some code (which previously used RgbaInputFile) to
> > support MultiPartInputFiles and InputPart objects.
> >
> > But there is no InputPart::setLayerName(). Once I have identified a
> > part, how am I supposed to request the "left" or "right" view for
> > instance, assuming the part has both left and right channel descriptors?
> Each part has a header with both a view() and a name() call for that
> header.  The name tells you what you are dealing with and the view()
> what left or right eye you are dealing with.  However note that
> supporting view() is optional (hasView()), so it is a good idea to check
> for "left" or "right" string in the name().

So it appears that parts would be taking the place of the old 
"multi-view" system in this case?

Previously, I might see a stereo multi-view file with a "left" and 
"right" view, and channel names like: left.R, left.G, left.B, and 
right.R, right.G, right.B.

I was assuming that multi-part files would keep this idiom, but allow 
multiple versions/images in the same file, so I might see this:

part 0: original
left.R, left.G, left.B, right.R, right.G, right.B

part 1: processed
left.R, left.G, left.B, right.R, right.G, right.B

But without a way to target specific "layers" in the InputPart class, 
should I be expecting this instead?

part 0: original.left
R, G, B
part 1: original.right
R, G, B

part 2: processed.left
R, G, B
part 3: processed.right
R, G, B

Thanks for the input!