Struct Renderer 

pub struct Renderer { /* private fields */ }

Main renderer that coordinates rendering pipeline

Implementations

impl Renderer

pub fn new( backend_type: BackendType, context: RenderContext, ) -> Result<Self, RenderError>

Create a new renderer with the given backend type and context

pub fn with_backend( context: RenderContext, backend: Box<dyn RenderBackend>, ) -> Result<Self, RenderError>

Create a new renderer with a specific backend instance

pub fn with_auto_backend(context: RenderContext) -> Result<Self, RenderError>

Create renderer with automatic backend detection

pub fn render_frame( &mut self, script: &Script<'_>, time_cs: u32, ) -> Result<Frame, RenderError>

Render a frame for the given script at the specified time

pub fn render_frame_bitmaps( &mut self, script: &Script<'_>, time_cs: u32, ) -> Result<Vec<RenderBitmap>, RenderError>

Render the active subtitles at time_cs to a positioned bitmap list (libass ASS_Image style) rather than a composited frame.

The caller (typically a video player or GPU) composites the returned bitmaps. This skips the renderer’s full-frame clear, the final composite blend and the frame-buffer copy — the model real integrations use, and the apples-to-apples shape of libass’s own output. Requires a software backend.

pub fn render_frame_incremental( &mut self, script: &Script<'_>, time_cs: u32, previous_frame: &Frame, ) -> Result<Frame, RenderError>

Render frame incrementally (dirty regions only)

pub fn backend_type(&self) -> BackendType

Get current backend type

pub fn set_context(&mut self, context: RenderContext)

Update render context

pub fn context(&self) -> &RenderContext

Get render context

pub fn context_mut(&mut self) -> &mut RenderContext

Get mutable render context

pub fn set_collision_resolver(&mut self, _resolver: Box<dyn CollisionDetector>)

Set collision resolver for subtitle positioning

pub fn metrics(&self) -> Option<PerformanceMetrics>

Get performance metrics if available

pub fn cache_stats(&self) -> CacheStatistics

Get cache statistics