Trait RenderBackend 

pub trait RenderBackend {
    // Required methods
    fn begin_frame(
        &mut self,
        width: u32,
        height: u32,
        scale_factor: f32,
        generation: u64,
    ) -> Result<(), RendererError>;
    fn render_frame(
        &mut self,
        commands: &[DrawCommand],
        clear_color: Option<Color>,
    ) -> Result<(), RendererError>;

    // Provided method
    fn read_rgba(&self) -> Option<Vec<u8>> { ... }
}

Required Methods

fn begin_frame( &mut self, width: u32, height: u32, scale_factor: f32, generation: u64, ) -> Result<(), RendererError>

Begin a new frame. Note: scale_factor and generation may be ignored by backends that receive pre-scaled commands (see SoftwareRenderer::begin_frame).

fn render_frame( &mut self, commands: &[DrawCommand], clear_color: Option<Color>, ) -> Result<(), RendererError>

Process and present all draw commands for this frame. Must be called exactly once per frame after begin_frame.

Provided Methods

fn read_rgba(&self) -> Option<Vec<u8>>

The most recently rendered frame as premultiplied RGBA8888 ([R, G, B, A] per pixel, row-major), if this backend renders to an offscreen target. Windowed/on-screen backends present directly and return None. Used to read back pixels from a headless render pass.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors