Font

This is a simple deno module providing wasm bindings to the fontdue for font rasterization and layout with support for TrueType (.ttf/.ttc) and OpenType (.otf).

Example

Rasterization

import { Font } from "https://deno.land/x/font/mod.ts";

// Read the font data.
const data = await Deno.readFile("../Roboto-Regular.ttf");
// Parse it into the font type.
const font = new Font(font);
// Rasterize and get the layout metrics for the letter 'g' at 17px.
let { metrics, bitmap } = font.rasterize("g", 17.0);

Prerequisites

prerequisite	installation
deno	deno_install
rust	rustup
rustfmt	`rustup component add rustfmt`
rust-clippy	`rustup component add clippy`
wasm-pack	`cargo install wasm-pack`

Development

build

$ deno run --unstable --allow-read --allow-write --allow-run scripts/build.ts
building rust                  ("wasm-pack build --target web --release")
read wasm                      (size: 150856 bytes)
compressed wasm using lz4      (reduction: 58651 bytes, size: 92205 bytes)
encoded wasm using base64      (increase: 30735 bytes, size: 122940 bytes)
read js                        (size: 5895 bytes)
inlined js and wasm            (size: 129016 bytes)
minified js                    (size reduction: 3100 bytes, size: 125916 bytes)
writing output to file         (wasm.js)
final size is: 125916 bytes

clean

$ deno run --unstable --allow-read --allow-write --allow-run scripts/clean.ts
cleaning cargo build           ("cargo clean")
removing pkg

fmt

$ deno run --unstable --allow-run scripts/fmt.ts
formatting typescript          ("deno --unstable fmt scripts/ test_deps.ts test.ts mod.ts")
Checked 9 files
formatting rust                ("cargo fmt")

lint

$ deno run --unstable --allow-run scripts/lint.ts
linting typescript             ("deno --unstable lint scripts test_deps.ts test.ts mod.ts")
Checked 9 files
linting rust                   ("cargo clippy -q")

Testing

Requires the wasm.js file to be built first.

$ deno test
running 1 tests
test add ... ok (2ms)

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out (2ms)

Other

Contribution

Pull request, issues and feedback are very welcome. Code style is formatted with deno fmt and commit messages are done following Conventional Commits spec.