Trait DrawSink 

pub trait DrawSink {
    // Required methods
    fn upload(&mut self, commands: &[DrawCommand]);
    fn present(&mut self) -> Result<(), DrawError>;
    fn resize(&mut self, size: (u32, u32));
    fn set_scale_factor(&mut self, scale_factor: f64);
}

A destination for one window’s draw commands.

Callers produce commands with DrawCommand and hand them over; the sink decides when and how they reach a display.

upload only records, and present submits, so a caller may feed several command sets before showing anything — or record without ever presenting, which is what the offscreen sinks do.

Required Methods

fn upload(&mut self, commands: &[DrawCommand])

Records and uploads commands for the next frame.

fn present(&mut self) -> Result<(), DrawError>

Draws and presents whatever upload recorded.

fn resize(&mut self, size: (u32, u32))

Notifies the sink that its drawable changed size, in physical pixels.

fn set_scale_factor(&mut self, scale_factor: f64)

Notifies the sink that the display scale factor changed.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl DrawSink for GpuRenderer

Presents through a wgpu surface bound to an OS window.

This is the shell’s default DrawSink. Callers above the seam only ever see the trait, so the fact that presentation is tied to a window surface stays contained here.