femtovg

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Work in progress!

Antialiased 2D vector drawing library written in Rust. Ported from https://github.com/memononen/nanovg

Most of the implementation is the same as the original C code with some bug fixes, some features added and several parts have been made more Rust-y. FemtoVG has rendering support via OpenGl (ES) 3.0+ backend and the wgpu backend.

Screenshots

Demo

Run with cargo run --example demo for the OpenGL backend and run with cargo run --example wgpu_demo for the wgpu backend. Run with --release for best performance.

Breakout

Run with cargo run --example breakout

SVG

Run with cargo run --example svg

Text

Run with cargo run --example text

Features

• Anti-aliasing
• Bézier paths filling and stroking
• Solid color and image pattern fills and strokes
• Gradients - box, linear and radial
• Stroke width and miterlimit
• Stroke caps: butt, round and square
• Stroke joins: miter, round and bevel
• Fill rules - EvenOdd/NonZero
• Rectangle scissoring
• Composition modes (SourceOver, SourceIn, SourceOut, Atop, etc..)
• Global alpha
• Text filling and stroking
• Text shaping
• Text alignment: (left center right), (top, middle, alphabetic, bottom)
• Nearest font matching
• Path hit testing

In progress

• Metal backend

Not supported

• Stroke dashing
• Path scissoring
• Custom shaders
• 3D transforms
• OpenGl ES2 backend
• Color fonts

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.

Fonts used in examples:

• Roboto licensed under Apache license
• Entypo licensed under CC BY-SA 4.0.
• Amiri licensed under SIL Open Font License, Version 1.1

Debugging