Matteo Franchin

> I'm not sure as to what complexity you are referring to here. Layers should handle unknown function pointers uniformly, in that they simply query the next layer down (save...

> This distinction leads me to think that layers shouldn't be responsible for returning NULL here, the extension is being enabled regardless. Implicit layers that intend to implement a Vulkan...

The prototype you propose seems good to me. It would definitely help the use case explained in the description of this issue: decide whether a layer can safely call down...

> Could you explain the rationale for needing to know which ICD supports which instance extension? This problem emerged while working on the layer at https://gitlab.freedesktop.org/mesa/vulkan-wsi-layer In this layer we...

It seems to me that implicit layer ordering is indeed an area that deserves to be improved. In terms of actual implementation, I am not sure using an integer to...