Only load subsets of very large volumes into texture memory

[frasercl]

Use Case

If users force loading of a very large volume, the first hard technical limit they run up against seems to be allowable GPU texture size. Alex tried to load only a single slice of a very high resolution image, but errored out with a texture size indicating Vol-E was trying to load the whole thing into texture memory.

Solution

Can we load smaller subsets of an image into texture memory than we load from the loader?

[toloudis]

Do you have a url to the image and/or some info about the actual dimensions?

A possible alternative implementation would be to downsample at load time in the loader thread. AGAVE has an open issue ticket for this, and the viewer ChimeraX has this as a user option.