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`skia-canvas`

GPU-accelerated, multi-threaded HTML Canvas-compatible 2D rendering for Rust and Node.js, powered by Skia.

A fork of samizdatco/skia-canvas that adds:

F16/F32 pixel formats for HDR compositing.
Extended color spaces: Display P3, Rec.2020, HDR10 (PQ), HLG, plus linear variants.
OkLab gradient interpolation in OkLab, OkLCH, Lab, LCH, HSL, HWB.
CanvasKit filter parity (ColorFilter, ImageFilter).
Font registration from buffers without writing to disk.
Variable font axis control (wght, wdth, opsz, slnt, custom axes).
Linear-light premultiplied colors plumbed through paint, gradient, filter, text.
ParagraphBuilder/Paragraph rich text with mixed styles, per-run shadows, hit-testing, line metrics.

Rust

[dependencies]
skia-canvas = { version = "0.1", default-features = false, features = ["vulkan", "freetype"] }

The stable Rust API lives under skia_canvas::native. Public signatures never expose skia_safe or neon types -- a compile-time pin in tests/native_studio_renderer_adapter.rs enforces this.

use skia_canvas::native::{
    LinearColorSpace, NativeBackend, NativePaint, Rect, RgbaLinear, SurfaceOptions,
};

let backend = NativeBackend::new();
let mut surface = backend.create_surface(
    1920,
    1080,
    SurfaceOptions {
        color_space: LinearColorSpace::DisplayP3,
        ..SurfaceOptions::default()
    },
)?;

surface.with_canvas(|canvas| {
    canvas.clear(RgbaLinear::new_premultiplied(0.0, 0.0, 0.0, 0.0));
    canvas.draw_rect(
        Rect::from_xywh(100.0, 100.0, 200.0, 100.0),
        &NativePaint::fill(RgbaLinear::opaque(1.0, 0.0, 0.0)),
    );
});

let frame = surface.read_pixels()?; // tight RGBA8, sRGB-gamma, unpremultiplied

See docs/api/native-rust.md for the reference and examples/ for runnable code.

Cargo features

Feature	Notes
`vulkan`	Vulkan backend (Linux / Windows).
`metal`	Metal backend (macOS).
`window`	`winit`-backed event loop.
`freetype`	Bundle FreeType + WOFF2 (recommended on minimal containers).
`node-addon`	Register the `#[neon::main]` Node addon entry point. Pure-Rust consumers leave this off.

Default feature set is empty; opt in to the backend you need.

Skia version

`skia-canvas`	`skia-safe`	Skia milestone
`0.1.x`	`0.97.x`	M148

The Skia revision is pinned by skia-safe; bumping skia-safe is a skia-canvas minor-version event.

Node.js

The same source tree also produces the phyron-skia-canvas npm package.

npm install phyron-skia-canvas

import { Canvas } from "phyron-skia-canvas";

let canvas = new Canvas(1920, 1080, {
  colorType: "rgbaf16",
  colorSpace: "rec2020-pq", // HDR10
});

See docs/node.md for installation, platform support (Linux / Docker / AWS Lambda / Next.js), the JavaScript API, and benchmarks.

Acknowledgements

Built on top of the rust-skia project (skia-safe + skia-bindings). Forked from samizdatco/skia-canvas; many thanks to its contributors.

License

MIT. See LICENSE.

skia-canvas 0.1.0