Help creating an egui image from a wgpu texture using the new egui_wgpu backend

[junglie85]

I'm trying to understand how to use an existing wgpu texture (used for offscreen rendering) and display it in an egui image ui element. Specifically, the image element seems to require an egui TextureId, for which I believe I need to create a User variant, but I don't understand how I then register that texture with the egui_wgpu backend.

Previously, I was using the hasenbanck/egui_wgpu_backend crate (version 0.16), which had a function to convert the wgpu texture to an egui texture. Looking at the implementation for this, it seems that the texture management was done by the backend but that this functionality is no longer present in the egui_wgpu crate.

There's clearly a gap in my understanding or an example I've missed. Would somebody be able to point me at the relevant example, section(s) in the docs or explain how, in the 0.18 version with the new backend implementation, I can render an existing texture to an egui image (without copying back to RAM and re-uploading)?

[junglie85]

I’ve just seen #1660 which I think will answer this question.