femtovg's Introduction

femtovg

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

In progress

Metal backend

Not supported

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

femtovg's People

Contributors

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femtovg's Issues

Crash while resizing windows

Environment

Debian stable running X11 with Nvidia drivers

Steps to reproduce

cargo run --example wgpu_demo

Resize the window. Keep resizing until you get this:

reallocating stencil texture Instant { tv_sec: 255277, tv_nsec: 152997264 }
reallocating stencil texture Instant { tv_sec: 255277, tv_nsec: 202835828 }
reallocating stencil texture Instant { tv_sec: 255277, tv_nsec: 245754503 }
reallocating stencil texture Instant { tv_sec: 255277, tv_nsec: 284947364 }
reallocating stencil texture Instant { tv_sec: 255277, tv_nsec: 334616553 }
wgpu error: Validation Error

Caused by:
    In a RenderPass
      note: encoder = `<CommandBuffer-(0, 275, Vulkan)>`
    In a pass parameter
      note: command buffer = `<CommandBuffer-(0, 275, Vulkan)>`
    attachments have differing sizes: ("depth", Extent3d { width: 716, height: 356, depth_or_array_layers: 1 }) is followed by ("color", Extent3d { width: 780, height: 600, depth_or_array_layers: 1 })


thread 'main' panicked at 'Handling wgpu errors as fatal by default', /home/birkett/.cargo/git/checkouts/wgpu-rs-40ea39809c03c5d8/1f8e411/src/backend/direct.rs:1942:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Segmentation fault

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