Lib.rs

2D drawing abstraction that allows applications/frameworks to support many rendering backends through a unified API.

Painting a scene

The core abstraction in AnyRender is the PaintScene trait.

PaintScene is a "sink" which accepts drawing commands:

• Applications and libraries draw by pushing commands into a PaintScene
• Backends execute those commands to produce an output

Rendering to surface or buffer

In addition to PaintScene, there is:

• The ImageRenderer trait which provides an abstraction for rendering to a Vec<u8> RGBA8 buffer.
• The WindowRenderer trait which provides an abstraction for rendering to a surface/window

SVG

The anyrender_svg crate allows SVGs to be rendered using AnyRender

WASM support

Wgpu adapter/device/surface initialization is fundamentally async on the web. To avoid deadlocking the JS event loop, WindowRenderer::resume takes an on_ready callback: GPU backends spawn the init on wasm_bindgen_futures::spawn_local and invoke the callback once the surface is live. The embedder then calls WindowRenderer::complete_resume to transition the renderer to the active state. On native targets the same code path runs inline (pollster::block_on on the GPU backends), so callers see no behavioural difference.

Backends

Currently existing backends are:

• anyrender_vello
• anyrender_vello_cpu