Trait HostSurface 

pub trait HostSurface: Send + Sync {
    // Provided methods
    fn can_resize(&self) -> bool { ... }
    fn request_size(&self, width: f32, height: f32) -> Result<(), ResizeRefused> { ... }
}

What an application may ask of the host’s surface.

The surface’s size is not asked of a backend: every host publishes it as it lays the surface out, and host_surface_size answers from that. What a backend adds is the other direction — whether this host lets the application choose a size, and how to ask for one.

Provided Methods

fn can_resize(&self) -> bool

Whether this host accepts resize requests at all.

fn request_size(&self, width: f32, height: f32) -> Result<(), ResizeRefused>

Asks the host for a different surface size.

Hosts are free to clamp or ignore the request, so the answer is only “the request was accepted”: the size that actually took effect arrives through the observable state.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors