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Unify extension module hierarchies #894

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merged 4 commits into from
Mar 30, 2024
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@Ralith Ralith commented Mar 26, 2024

Fixes #876.

As a bonus, this significantly reduces the amount of boilerplate required to wrap a new extension.

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Looks like we're heading in the right direction to make Ash increasingly easy to use! Just wondering if we need to consider something similar for Entry/Instance/Device now.

Don't forget a changelog entry!

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Ralith commented Mar 26, 2024

Updated changelog.

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That's an amazing amount of repetitive hand-written code gone from the codebase! We should've done this much sooner, specifically these duplicated bits have been a continuous source of conflicts and compiler errors during the refactors of the past week.


This is also a direction I was hoping to head into with better generator support: at some point we can start autogenerating some of these functions, and use both heuristics and config files to allow keeping manual implementations where a generator just doesn't understand the desired API.

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@Ralith Ralith force-pushed the unified-exts branch 4 times, most recently from bd54abb to 851e297 Compare March 29, 2024 21:11
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Ralith commented Mar 29, 2024

Revised approach: all core and extension raw type definitions and constants are exported directly under ash::vk. This includes e.g. extension name constants, which are named in the upstream style, less VK_. Extensions modules are exported under ash::{khr, ext, ...}, and include high-level wrappers, *Fn tables, and NAME and SPEC_VERSION reexports. Core *Fn structs are exported directly under ash.

This standardizes ash::vk as being purely unopinionated "sys" style bindings, while everything else is exposed under ash. We accept a small risk of a name collision between a future vendor tag and any other items we want to expose at the crate level.

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Lots of changes to separate code out of extensions.rs, but all for the better in the end!

@Ralith Ralith merged commit 3d84654 into ash-rs:master Mar 30, 2024
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@Ralith Ralith deleted the unified-exts branch March 30, 2024 00:37
@@ -76,6 +76,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- extensions/ext/ray_tracing_pipeline: Pass indirect SBT regions as single item reference (#829)
- Replaced `c_char` array setters with `CStr` setters (#831)
- `push_next()` functions now allow unsized `p_next` argument (#855)
- Flattened `ash::extensions` into `ash`, flattened `ash::vk::*` extension modules into `ash::vk`, and moved `*Fn` function pointer table structs from `ash::vk` into `ash` or the associated extension module (#894)
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flattened ash::vk::* extension modules into ash::vk

That seems slightly strange to mention as extension modules didn't exist (not even in ash::vk::*) in the latest release (they've only been introduced and resided there temporarily).

However, looks like we totally forgot to even mention that entire mod-refactor for extensions in #734.

Alas, nothing too bad, as I think we should write a proper actionable summary when publishing the 0.38 release.

MarijnS95 added a commit that referenced this pull request Mar 31, 2024
…nsion wrappers

In #894 we lost the ability to `Clone` the high-level wrappers, even
though the underlying `*Fp` table and the `vk::Instance` or `vk::Device`
handle themselves are `Clone`.  Restore that behaviour.
MarijnS95 added a commit that referenced this pull request Mar 31, 2024
…nsion wrappers (#899)

In #894 we lost the ability to `Clone` the high-level wrappers, even
though the underlying `*Fp` table and the `vk::Instance` or `vk::Device`
handle themselves are `Clone`.  Restore that behaviour.
MarijnS95 added a commit that referenced this pull request Mar 31, 2024
…th 3 specialized functions

Since the extension modularization in #894 this `enum ShaderInfoResult`
is no longer reachable through the crate hierarchy, making it impossible
for callers to match on its variants.

Not that this type was ideal to begin with: the returned `enum`
variant depended purely on the `info_type` parameter, leading to ugly
`unreachable!()`-like unwraps in caller code when the variant should
always be of the type that a caller requested.

To solve both issues, create 3 instances of the `get_shader_info()`
function for each of the 3 `vk::ShaderInfoTypeAMD`s that a caller can
request.
MarijnS95 added a commit that referenced this pull request Apr 1, 2024
…th 3 specialized functions (#901)

Since the extension modularization in #894 this `enum ShaderInfoResult`
is no longer reachable through the crate hierarchy, making it impossible
for callers to match on its variants.

Not that this type was ideal to begin with: the returned `enum`
variant depended purely on the `info_type` parameter, leading to ugly
`unreachable!()`-like unwraps in caller code when the variant should
always be of the type that a caller requested.

To solve both issues, create 3 instances of the `get_shader_info()`
function for each of the 3 `vk::ShaderInfoTypeAMD`s that a caller can
request.
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Merge function pointer table struct with high level wrapper struct
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