Arman Uguray b4ffb88494 [shaders] Revise access to backend-agnostic metadata ... Previously the generated shader data structures were rooted in backend-specific top-level mods (`mod wgsl`, `mod msl`, etc). This made access to per-shader information that is common to all backends (e.g. workgroup sizes, shader name etc) awkward to access from backend agnostic code, especially when feature-gated conditional compilation is used on the client side. The data structures have been rearranged such that there is a top-level `ComputeShader` declaration for each stage under a `gen` mod. The `ComputeShader` struct declares feature-gated fields for backend shader sources, such that backend specific data is now a leaf node in the structure rather than the root. This has some additional benefits: 1. Common data doesn't have to be redeclared, saving on code size when multiple backends are enabled. 2. The backend specific source code was previously encoded as a `[u8]`. We can now use types that more closely match the expected format, for example `&str` for WGSL and MSL, `[u32]` for SPIR-V, etc. 3. If we ever need to expose additional backend-specific metadata in the future, we can bundle them alongside the source code in a backend-specific data structure at this level of the tree.		2023-05-10 14:12:13 -07:00
..
encoding	feature gate full pipeline encoding support	2023-05-03 12:22:51 -04:00
shaders	[shaders] Revise access to backend-agnostic metadata	2023-05-10 14:12:13 -07:00