Crate frust_scene 

Layer 3: vector scene / display list, renderer-agnostic scene builder.

Scene/SceneBuilder/Command are the stable seam between widgets (layer 1+2) and the GPU backend (layer 4, frust-render). Only kurbo (geometry) and peniko (brushes/fonts) appear in this crate’s public API — vello/wgpu types are forbidden here so the render backend can be swapped later.

Structs

CornerRadii

Per-corner radii for a rounded rectangle, in the pre-transform coordinate space.

DashPattern

A stroke’s dash pattern: an on run, an off gap, and a phase offset into that repeating cycle — all lengths in the pre-transform coordinate space.

FontHandle

Opaque wrapper around a loaded font resource (blob + collection index).

Glyph

A single positioned glyph within a GlyphRun.

GlyphRun

A run of glyphs sharing a font, size, brush, and transform.

Scene

Renderer-agnostic, immediate-mode display list.

SceneBuilder

Records paint commands into a Scene, maintaining a transform stack.

ShaderProgram

A runtime fragment-shader program (WGSL source) — the Frust analog of Flutter’s FragmentProgram.

Enums

Command

A single paint operation recorded into a Scene.

PathStyle

How a Command::Path is rendered: filled or stroked.

Functions

arc_path

Builds a kurbo::BezPath tracing a circular arc centered at center with the given radius, from start_angle sweeping sweep_angle (both in radians, matching kurbo::Arc’s convention: 0 = positive x-axis, positive = clockwise in a y-down coordinate space).