908c40dd88
# Objective
Pipelines can be customized by wrapping an existing pipeline in a newtype and adding custom logic to its implementation of `SpecializedMeshPipeline::specialize`. To make that easier, the wrapped pipeline type needs to implement `Clone`.
For example, the current non-cloneable pipelines require wrapper pipelines to pull apart the wrapped pipeline like this:
```rust
impl FromWorld for Wireframe2dPipeline {
fn from_world(world: &mut World) -> Self {
let p = &world.resource::<Material2dPipeline<ColorMaterial>>();
Self {
mesh2d_pipeline: p.mesh2d_pipeline.clone(),
material2d_layout: p.material2d_layout.clone(),
vertex_shader: p.vertex_shader.clone(),
fragment_shader: p.fragment_shader.clone(),
}
}
}
```
## Solution
Derive or implement `Clone` on all built-in pipeline types. This is easy to do since they mostly just contain cheaply clonable reference-counted types.
---
## Changelog
Implement `Clone` for all pipeline types.
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|---|---|---|
| .. | ||
| color_material.rs | ||
| color_material.wgsl | ||
| material.rs | ||
| mesh2d_bindings.wgsl | ||
| mesh2d_functions.wgsl | ||
| mesh2d_types.wgsl | ||
| mesh2d_vertex_output.wgsl | ||
| mesh2d_view_bindings.wgsl | ||
| mesh2d_view_types.wgsl | ||
| mesh2d.wgsl | ||
| mesh.rs | ||
| mod.rs | ||