Struct CachedFrameData 

pub struct CachedFrameData {

    pub gpu_scene: GpuScene,
    pub transparent_gpu_scene: GpuScene,
    pub transparent_batches: Vec<TransparentBatch>,
    pub glyph_draws: Vec<([f32; 2], RasterizedGlyph, ColorLinPremul, i32)>,
    pub svg_draws: Vec<(PathBuf, [f32; 2], [f32; 2], Option<SvgStyle>, i32, Transform2D, Option<Rect>)>,
    pub image_draws: Vec<(PathBuf, [f32; 2], [f32; 2], i32, Option<Rect>)>,
    pub external_texture_draws: Vec<ExtractedExternalTextureDraw>,
    pub clear: Color,
    pub direct: bool,
    pub width: u32,
    pub height: u32,
    pub scroll_at_build: (f32, f32),
    pub generation_at_build: u64,
    pub viewport_size: (u32, u32),
    pub hit_index: HitIndex,
}

Cached GPU resources from a previous end_frame call, enabling scroll-only frames to skip the expensive IR walk, display list build, and GPU upload. Instead, the cached buffers are re-rendered with a delta scroll offset applied via the viewport uniform.

Fields

gpu_scene: GpuScene

The GPU scene (vertex/index buffers for opaque geometry).

transparent_gpu_scene: GpuScene

The GPU scene for transparent (per-z-batch) geometry.

transparent_batches: Vec<TransparentBatch>

Per-z-index ranges in the transparent index buffer.

glyph_draws: Vec<([f32; 2], RasterizedGlyph, ColorLinPremul, i32)>

Pre-rasterized glyph draws.

svg_draws: Vec<(PathBuf, [f32; 2], [f32; 2], Option<SvgStyle>, i32, Transform2D, Option<Rect>)>

Resolved SVG draws.

image_draws: Vec<(PathBuf, [f32; 2], [f32; 2], i32, Option<Rect>)>

Resolved image draws.

external_texture_draws: Vec<ExtractedExternalTextureDraw>

External texture draws (e.g. Canvas3D, opacity group layers).

clear: Color

Clear color used for this frame.

direct: bool

Whether the frame was rendered directly (vs intermediate texture).

width: u32

Frame dimensions.

height: u32

scroll_at_build: (f32, f32)

Scroll offset at the time the frame was built, for computing the delta.

generation_at_build: u64

Visual generation at build time.

viewport_size: (u32, u32)

Viewport size at build time (for invalidation).

hit_index: HitIndex

The hit index from the built frame (reused during scroll-only frames).