Rendering & Media

Kinetoor renders web content through a pipeline inherited from Servo and hardened for production browser workloads.

CSS & layout

• Stylo fork for style computation and cascade
• Servo layout 2020 — Flexbox, Grid, Tables
• html5ever tokenization and tree construction (WHATWG-compliant)
• rust-cssparser for high-throughput stylesheet parsing

JavaScript

• SpiderMonkey v140.5 via mozjs Rust bindings
• IonMonkey JIT for warm paths
• DOM bindings and Web APIs in the script component
• Background tab suspension — JS context frozen when inactive

GPU paint

• WebRender compositor — display lists rasterized on GPU
• Supports Metal (macOS), Vulkan (Linux), DirectX (Windows) via surfman
• Thermal throttling reduces paint to 10 FPS on inactive tabs

Media (roadmap)

Feature	Status
<video> / <audio>	GStreamer pipeline (in progress)
MSE (Media Source Extensions)	Planned
WebRTC	Planned
WebAudio	Documented in engine media specs

Web platform APIs

• Canvas 2D and WebGL
• WebGPU behind feature flag
• IndexedDB, localStorage, cookies
• WebCrypto with post-quantum algorithms available
• WebSockets via async-tungstenite

Conformance

Web Platform Tests (WPT) run against Kinetoor continuously. Passing rate is tracked per component — layout and script are the highest-priority suites.