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 start_condition(e: &Event<()>) -> bool

Check if the event is the start condition for the surface.

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

Called when an event which matches Self::start_condition is received.

On all native platforms, this is where we create the surface.

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) -> SurfaceTexture

Acquire the next surface texture.

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On suspend on android, we drop the surface, as it’s no longer valid.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

fn config(&self) -> &SurfaceConfiguration