Async GPU Upload Support?

[gglang]

Hello,

Thank you for all the work on this package!

It seems to be using Texture2d.Apply under the hood. If I am not mistaken, this triggers a synchronous GPU upload. This synchronous upload can cause frames to drop if the image is not small, and/or its a weak mobile device.

Do you have any suggestions for doing asynchronous GPU uploads?

Best, Gerald