Mention that structured buffers can't be used with descriptor heaps using untyped pointers?

[SaschaWillems]

After the obstacles I've gone through to realize that it's not yet possible: Should we maybe add a note to the descriptor heap's untyped pointer chapter that it's not yet possible to use it for structured buffers? That could save other developers running in the same issue.

And then update once KhronosGroup/GLSL#299 lands.

Thoughts?

[spencer-lunarg]

Thoughts?

personally, I wish we didn't ship the extension with a broken/beta version of GLSL and just get GLSL_EXT_structured_descriptor_heap in ASAP

but sure, could put something in the chapter basically saying "the current glslang implementation will likely blow up in your face"

[SaschaWillems]

Totally agree. Is there any ETA for that extension to land?

It looks like people are now (slowly) starting to run into similar issues while trying to use or implement descriptor heap :/

[spencer-lunarg]

Is there any ETA for that extension to land?

... zero idea 😢 , I'd ask the extension champion on the extension PR, LunarG was not asked/told/planning to do it

[gpx1000]

It'd probably be good to give good guidance on it for sure. We should steer people away from it for now and then towards it when appropriate and have the guide chapter able to provide that advice. Although, I think the guide chapter is a bit of a lipstick on a pig solution. as releasing something to the standard is a highly visible thing, and releasing info to the guide chapter is at best low visible guidance to those interested. We really should do a blog or something that's a bit more visible. However, a guide chapter is probably the most we can do in a reasonable amount of time.

[SaschaWillems]

Tbf untyped pointers with descriptor heaps do work (now), "just" with the limitation that you can't to structured buffers yet.

[gpx1000]

I mean fair enough, but we should state what version of Vulkan they actually arrived in, also that structured buffers are at the very least expected to not work. Just setting expectations is the real thing we should do.

[SaschaWillems]

True. If Spencer wouldn't have brought the structured extension to my attention I'd probably still try to get them working with untyped pointers ^^