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MewBindGroup

mew::bindgroup

Trait MewBindGroup 

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pub trait MewBindGroup {
    type BufferSet;
    type BufferArray<T>;

    // Required methods
    fn new(bind_group: BindGroup, buffers: Self::BufferSet) -> Self;
    fn layout_entries() -> &'static Self::BufferArray<BindGroupLayoutEntry>;
    fn layout_desc() -> BindGroupLayoutDescriptor<'static>;
    fn bind_group_entries(
        buffers: &Self::BufferSet,
    ) -> Self::BufferArray<BindGroupEntry<'_>>;
    fn bind_group_desc<'a>(
        layout: &'a MewBindGroupLayout<Self>,
        entries: &'a Self::BufferArray<BindGroupEntry<'_>>,
    ) -> BindGroupDescriptor<'a>;
}
Expand description

Trait for internal use to work with bind groups - getting their layouts and descriptors and whatnot.

The number of internal buffers must be defined in the generic parameter, because associated consts are “uNsTAbLe”, apparently.

Required Associated Types§

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type BufferSet

A tuple of all the bind group’s internal buffers.

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type BufferArray<T>

A generic array the length of the number of buffers (literally [T; N]).

Required Methods§

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fn new(bind_group: BindGroup, buffers: Self::BufferSet) -> Self

Build this bind group type from a wgpu::BindGroup and all its internal buffers in a tuple.

Technically the buffers don’t need to be stored with the bind group they’re used in - or at all, it should even be safe to drop them as they’ll be kept around on the GPU side - but as an abstraction, they exist as members of the bind group.

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fn layout_entries() -> &'static Self::BufferArray<BindGroupLayoutEntry>

Get an array of wgpu::BindGroupLayoutEntrys for all internal buffers.

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fn layout_desc() -> BindGroupLayoutDescriptor<'static>

Get a wgpu::BindGroupLayoutDescriptor to build this type of bind group.

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fn bind_group_entries( buffers: &Self::BufferSet, ) -> Self::BufferArray<BindGroupEntry<'_>>

Get an array of wgpu::BindGroupEntrys, for use with Self::bind_group_desc.

Necessary to put this in a separate function to keep the borrow checker happy - wgpu needs a reference to owned entries, which we can’t return in a struct later.

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fn bind_group_desc<'a>( layout: &'a MewBindGroupLayout<Self>, entries: &'a Self::BufferArray<BindGroupEntry<'_>>, ) -> BindGroupDescriptor<'a>

Get a wgpu::BindGroupDescriptor to build this bind group, using its layout and a reference to its wgpu::BindGroupEntrys from Self::bind_group_entries.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§