# Objective

- Another step towards render recovery after #22714 and #16481
- We need RenderResource unpacking to be reusable from a non-app context

## Solution

- Make it take main and render worlds as input
- Use subapp destructure to get mutable access to both worlds
simultaneously
- Move it to live next to the struct def
- Document
- Also move shader library loads up to build because theres no reason
for them to be in finish

## Testing

- 3d_scene runs

Note: reviewing commit by commit is easier, when a large block moves its
just copy paste

# Objective

- Recover from rendering errors.
- Another step towards render recovery after #22714 #22759 and #16481 

## Solution

- Use `wgpu::Device::set_device_lost_callback` and
`wgpu::Device::on_uncaptured_error` to listen for errors.
- Add a state machine for the renderer
- Update it on error
- Add a `RenderErrorHandler` to let users specify behavior on error by
returning a specific `RenderErrorPolicy`
- This lets us for example ignore validation errors, delete responsible
entities, or reload the renderer if the device was lost.

## Testing

- #22757 with any of
```rs
    .insert_resource(bevy_render::error_handler::RenderErrorHandler(|_, _, _| {
        bevy_render::error_handler::RenderErrorPolicy::StopRendering
    }))
```
```rs
    .insert_resource(bevy_render::error_handler::RenderErrorHandler(|_, _, _| {
        bevy_render::error_handler::RenderErrorPolicy::Recover(default())
    }))
```

Note: no release note yet, as recovery does not exactly work well: this
PR gets us to the point of being able to care about it, but we currently
instantly crash on recover due to gpu resources not existing anymore. We
need to build more resilience before publicizing imo.

---------

Co-authored-by: Kristoffer Søholm <k.soeholm@gmail.com>

# Objective

- Completes goal and closes #23029
- Culmination of #22761, #23350, #23349, #23433, #23458, #23444, #23459,
#23461, #23463, #22714, #22759, #16481

## Solution

- Add a release note.
- Re-export a wgpu type that you need to match on to handle errors.

## Testing

- cargo run --example render_recovery with all the other PRs merged in.
Press 5 and then V, the app will not crash. Note that D for "destroy
device" will still crash: this is a WGPU problem resolved by
gfx-rs/wgpu#9281.

# Note

I opted not to change the default recovery behavior yet. I believe we
need testing in user projects and just general trodding of this code
path before committing to a new default. It works in a simple example,
it might not work in a complex project. We need to field test this and
likely iterate to really call this ready IMO.

# Objective

- Completes goal and closes bevyengine#23029
- Culmination of bevyengine#22761, bevyengine#23350, bevyengine#23349, bevyengine#23433, bevyengine#23458, bevyengine#23444, bevyengine#23459,
bevyengine#23461, bevyengine#23463, bevyengine#22714, bevyengine#22759, bevyengine#16481

## Solution

- Add a release note.
- Re-export a wgpu type that you need to match on to handle errors.

## Testing

- cargo run --example render_recovery with all the other PRs merged in.
Press 5 and then V, the app will not crash. Note that D for "destroy
device" will still crash: this is a WGPU problem resolved by
gfx-rs/wgpu#9281.

# Note

I opted not to change the default recovery behavior yet. I believe we
need testing in user projects and just general trodding of this code
path before committing to a new default. It works in a simple example,
it might not work in a complex project. We need to field test this and
likely iterate to really call this ready IMO.