Vulkan: Use the very same view as input attachment and color attachment, not just the same image

[hrydgard]

Fixes most of the new validation errors seen in #16351, though one remains.

I believe that to be a bug in the validation layers, will investigate later.

[hrydgard]

Hm, still something weird going on..

[hrydgard]

Oh, I see. The validator wants every draw to a render pass where input attachments are used to pass the input attachment in a descriptor, regardless of whether it's actually used in that draw, or not. That's a bit annoying and I think overzealous - I'm gonna ask this question to certain people:

I'm wondering about VUID-vkCmdDraw-None-02686: "Every input attachment used by the current subpass must be bound to the pipeline via a descriptor set".
What about draws that have shaders that don't read from the input attachment? Like, in a subpass that has an input attachment, I first make a few regular draws, that don't care about input attachments, and then I make some draws that do care. Do those first draws really need to have the input attachment bound in their descriptor sets? I think the answer from a hardware perspective is obviously a clear "no" since it won't get read from, but the new validation layers complain loudly.