Expose Vulkan internal values for access from extensions #52203
Merged
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This PR exposes a few internal values in Vulkan that are needed in various extensions and can't be accessed.
@reduz I'm not happy about the solution so I'm up for suggestions on how to improve this. It's Vulkan only data that is supposed to stay internal and not exposed to GDScript nor exposed on the RenderingDevice base class. But we have no mechanism in place right now to only expose this data when Vulkan is used and then only to extensions.
@vnen I noticed that RenderingDevice::get_singleton() isn't available in extensions, is this just a matter of binding that method or is there another mechanism by which to do this?