devotee_backend

Trait Backend

Source 
pub trait Backend: Sized {
    // Required methods
    fn new(window: &Window, resolution: (u32, u32), scale: u32) -> Option<Self>;
    fn resize(&mut self, width: NonZeroU32, height: NonZeroU32) -> Option<()>;
    fn draw_image<'a, P: 'a, I>(
        &mut self,
        image: &'a dyn BackendImage<'a, P, Iterator = I>,
        converter: &dyn Converter<Palette = P>,
        window: &Window,
        background: u32,
    ) -> Option<()>
       where I: Iterator<Item = &'a P>;
    fn window_pos_to_inner(
        &self,
        position: PhysicalPosition<f64>,
        window: &Window,
        resolution: (u32, u32),
    ) -> Result<(i32, i32), (i32, i32)>;
}
Expand description

Backend trait. It provides functions to:

  • create new instance;
  • handle resize events;
  • to draw output;
  • recalculate pointer position to canvas space.

Required Methods§

Source

fn new(window: &Window, resolution: (u32, u32), scale: u32) -> Option<Self>

Create new backend instance.

Source

fn resize(&mut self, width: NonZeroU32, height: NonZeroU32) -> Option<()>

Handle resize event.

Source

fn draw_image<'a, P: 'a, I>( &mut self, image: &'a dyn BackendImage<'a, P, Iterator = I>, converter: &dyn Converter<Palette = P>, window: &Window, background: u32, ) -> Option<()>
where I: Iterator<Item = &'a P>,

Draw image on the backend.

Source

fn window_pos_to_inner( &self, position: PhysicalPosition<f64>, window: &Window, resolution: (u32, u32), ) -> Result<(i32, i32), (i32, i32)>

Recalculate pointer position to canvas space.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§