aetna-wgpu

wgpu backend for Aetna.

Most applications should not start here. Implement aetna_core::App and run it through aetna-winit-wgpu for a native window.

Use this crate directly when you are writing a custom host or embedding Aetna into an existing wgpu render loop:

1. Create a Runner with the target texture format.
2. Register any app shaders.
3. Forward pointer, keyboard, text-input, modifier, and wheel events to the runner.
4. Call prepare with a fresh El tree before drawing.
5. Call render when Aetna owns pass boundaries, especially for backdrop-sampling shaders; call draw only inside a pass you own and only when backdrop sampling is not needed.

Coordinates passed to interaction methods are logical pixels. Render targets are physical pixels; pass the host scale factor to prepare.