wgpu template: wgpu 27.0.1 -> 29.0.1, winit FIXME

[goldnor]

This PR updates wgpu and completes the migration to winit 0.30.13, resolving existing FIXME comments and aligning the implementation with the latest upstream examples. The migration was primarily guided by the official wgpu example.

• winit migration: event loop is handled now by the implementation of the ApplicationHandler trait.
• wgpu major changes:
  • Surface::get_current_texture now returns CurrentSurfaceTexture enum, which simplifies the old MySwapchainManager::render method (now State::render)
  • InstanceDescriptor initialization APIs and display handle changes: Instance is now recreated on ApplicationHandler::resumed, as recommended for platforms with lifecycle management constraints (e.g. mobile; see ApplicationHandler::resumed)

[Firestar99]

The CI will fail, you have to run cargo xtask generate to update the generate directory. You can also add -x "cargo b" to build all of the variants generated or run whatever you want

[Firestar99]

Oh yea if you deleted a file, --clean or delete the entire generated directory. I like to keep it around to not delete the cargo lockfiles, which speeds up iteration with cargo xtask generate -x "cargo b" due to it not having to recompile from scratch every time.

[Firestar99]

Thanks for your patch, but there's a few things I'd like slightly differently. I've never written it down anywhere (that's on me), but I made both MyRenderer and MySwapchain completely independent from each other on purpose. For MyRenderer, that could allow automated testing later down the line, since it just needs an image to draw to. MySwapchain isn't as straight forward, but it allows you to in theory reuse it with different renderers.

So I've taken your changes here and cleaned them up myself and split it into two different PRs, from where they'll live on in main soon :D

• update wgpu 27 -> 29#16, which is largely your changes
• winit 30 event loop#17. I rewrote it quite a bit, keeping the swapchain structure while updating it to the new event loop system with relatively minimal changes, and also updating the ash example.

I'd just close this PR and merge the other ones, if that's ok for you. I also have a rust-gpu upgrade locally I'll push soon.

[goldnor]

This totally makes sense. I didn’t pay enough attention to how you structured the code, though I did feel a bit bad about changing the generic rendering method that allows for different renderers. Thanks for taking the time to clean things up after me ^^

[Firestar99]

No worries, updating the templates was on my todo list for way too long already, since December there were a few changes that haven't made it to the templates, specifically the new cargo_gpu_install crate. Also triggered me to finally make cargo gpu new to expand these templates