Trait RenderBackend 

pub trait RenderBackend: Send + Sync {
    // Required methods
    fn backend_type(&self) -> BackendType;
    fn create_pipeline(&self) -> Result<Box<dyn Pipeline>, RenderError>;
    fn composite_layers(
        &mut self,
        layers: &[IntermediateLayer],
        context: &RenderContext,
    ) -> Result<Vec<u8>, RenderError>;

    // Provided methods
    fn composite_layers_incremental(
        &mut self,
        layers: &[IntermediateLayer],
        dirty_regions: &[DirtyRegion],
        previous_frame: &[u8],
        context: &RenderContext,
    ) -> Result<Vec<u8>, RenderError> { ... }
    fn render_layers_to_bitmaps(
        &mut self,
        layers: &[IntermediateLayer],
        context: &RenderContext,
    ) -> Result<Vec<RenderBitmap>, RenderError> { ... }
    fn supports_feature(&self, feature: BackendFeature) -> bool { ... }
}

Core rendering backend trait

Required Methods

fn backend_type(&self) -> BackendType

Get the backend type

fn create_pipeline(&self) -> Result<Box<dyn Pipeline>, RenderError>

Create a pipeline for this backend

fn composite_layers( &mut self, layers: &[IntermediateLayer], context: &RenderContext, ) -> Result<Vec<u8>, RenderError>

Composite layers into final frame

Provided Methods

fn composite_layers_incremental( &mut self, layers: &[IntermediateLayer], dirty_regions: &[DirtyRegion], previous_frame: &[u8], context: &RenderContext, ) -> Result<Vec<u8>, RenderError>

Composite layers incrementally (dirty regions only)

fn render_layers_to_bitmaps( &mut self, layers: &[IntermediateLayer], context: &RenderContext, ) -> Result<Vec<RenderBitmap>, RenderError>

Render layers to a positioned bitmap list (libass ASS_Image style) instead of a composited frame buffer, skipping the full-frame clear/copy. The default reports the backend does not support it.

fn supports_feature(&self, feature: BackendFeature) -> bool

Check if backend supports a specific feature

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl RenderBackend for SoftwareBackend