Partial compatibility

[AnyOldName3]

Pull Request Template

Description

Adds a function to compute the compatibility of partially compatible pipeline layouts. This is useful for things like knowing which descriptor sets need to be rebound when switching between layouts.

At the moment it returns a std::pair but could return a struct with named fields instead. It's just marginally less effort to use a pair then switch to a struct than to use a struct then switch to a pair, so a pair's better for prototyping.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

I made a visitor that compared a pipeline layout to everything it found in a subgraph and fed it some data that I knew the correct results for. It gave those results. It was only a small handful of combinations, though, and I didn't try it with any partial layouts. I don't think it's particularly risky as it's pretty similar to the existing compare function and as a new feature, it's not got any existing call sites to cause regressions with.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules