Struct SurfaceWrapper 

struct SurfaceWrapper {
    surface: Option<Surface<'static>>,
    config: Option<SurfaceConfiguration>,
}

Wrapper type which manages the surface and surface configuration.

As surface usage varies per platform, wrapping this up cleans up the event loop code.

Fields

surface: Option<Surface<'static>>

config: Option<SurfaceConfiguration>

Implementations

impl SurfaceWrapper

fn new() -> Self

Create a new surface wrapper with no surface or configuration.

fn pre_adapter(&mut self, instance: &Instance, window: Arc<Window>)

Called after the instance is created, but before we request an adapter.

On wasm, we need to create the surface here, as the WebGL backend needs a surface (and hence a canvas) to be present to create the adapter.

We cannot unconditionally create a surface here, as Android requires us to wait until we receive the Resumed event to do so.

fn resume(&mut self, context: &ExampleContext, window: Arc<Window>, srgb: bool)

Called on resume to create (on native) and configure the surface.

On all native platforms, this is where we create the surface. On wasm, the surface was already created in Self::pre_adapter.

Additionally, we configure the surface based on the (now valid) window size.

fn resize(&mut self, context: &ExampleContext, size: PhysicalSize<u32>)

Resize the surface, making sure to not resize to zero.

fn acquire( &mut self, context: &ExampleContext, window: Arc<Window>, ) -> Option<SurfaceTexture>

Acquire the next surface texture.

Returns None on failure.

fn suspend(&mut self)

On suspend on android, we drop the surface, as it’s no longer valid.

A suspend event is always followed by at least one resume event.

fn get(&self) -> Option<&Surface<'static>>

fn config(&self) -> &SurfaceConfiguration