Learn Velato - 10 Code Examples & CST Typing Practice Test
Velato is a Rust library (crate) that parses and renders Vello-compatible graphics from Lottie JSON animation files, enabling vector animations in Rust applications.
Learn VELATO with Real Code Examples
Updated Nov 26, 2025
Architecture
Input: Lottie JSON file (exported via Bodymovin from After Effects)
Parser: Rust code to deserialize JSON into a `Composition` data structure
Renderer: `velato::Renderer` translates the composition into a Vello `Scene`
Graphics backend: Vello draws the scene using GPU (or fallback) per frame
Optional integration: application’s render loop (desktop or wasm/web) calls Velato to draw animated frames
Rendering Model
Parser reads Lottie JSON -> Rust data structure
Renderer converts data to Vello scene graph objects
GPU backend draws the scene each frame
Frame-based rendering allows precise control (frame 0.0 -> last frame)
Scene graph can be combined with other custom drawings
Architectural Patterns
Separation of parsing (data) and rendering (graphics)
Scene graph abstraction (via Vello) for device‑agnostic drawing
Asset-based workflow (JSON animations, images if any)
Render loop abstraction - desktop or wasm/web
Optional layering: combine Lottie animations with custom Rust UI or graphics
Real World Architectures
Rust-based desktop application with animated onboarding screens
Game UI built in Rust where menu and HUD animations come from Lottie via Velato
Cross-platform (desktop + web) app using Velato for animated graphics and Vello for rendering
Interactive data visualization with animated vector charts/infographics
Prototyping animation-based UI components in Rust to reuse across projects
Design Principles
Safe, idiomatic Rust API
Reuse Lottie specification to enable designer‑to‑dev workflow
GPU-accelerated rendering for performance
Minimal dependencies and dual‑license (MIT/Apache)
Cross‑platform support including native and wasm/web
Scalability Guide
Reuse Composition and Renderer objects lifecycle rather than repeatedly re-creating them
Avoid very heavy or high‑frame‑rate animations if targeting lower‑end hardware or WebGPU-limited browsers
Batch animations or defer rendering when off-screen
Optimize Lottie files: reduce layers, avoid complex effects, simplify shapes
Profile and monitor GPU and memory usage under load
Migration Guide
Take existing Lottie animations -> parse in Velato -> render in Rust app
If animations include unsupported features (text, images, effects) -> consider simplifying in After Effects or fallback to alternative assets
For web build: set up wasm/WebGPU pipeline and test across target browsers
Modularize renderer and animation logic to isolate dependency on Velato
Test across platforms (desktop, web, mobile) if applicable
Frequently Asked Questions about Velato
What is Velato?
Velato is a Rust library (crate) that parses and renders Vello-compatible graphics from Lottie JSON animation files, enabling vector animations in Rust applications.
What are the primary use cases for Velato?
Rendering Lottie animations in Rust desktop or cross‑platform apps. Embedding vector-based animations in Rust game UIs. Interactive UI animations for Rust GUI applications. Converting Lottie projects to native Rust-based rendering pipelines. Prototyping or experimenting with animated graphics in Rust + Vello
What are the strengths of Velato?
Native Rust performance and safety (no JS runtime overhead). Leverages GPU via Vello for smooth vector animations. Cross-platform - desktop and experimental web builds. Opens Lottie’s animation possibilities to Rust ecosystem. Flexible: can integrate with other Rust rendering pipelines or GUI frameworks
What are the limitations of Velato?
Not fully spec‑complete: some Lottie features are not yet supported (e.g. text layers, image embedding, advanced effects like motion blur or drop shadows, certain easing or time‑remapping) :contentReference[oaicite:7]{index=7}. Dependent on Vello’s capabilities - limitations in Vello propagate to Velato. Web usage depends on WebGPU - browser support is still experimental or limited. Less tooling/documentation compared to mainstream Lottie libraries (e.g. lottie‑web). Requires Rust knowledge - not a no‑code or simple JS solution
How can I practice Velato typing speed?
CodeSpeedTest offers 10+ real Velato code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.