/msdfgen-rs

Rust bindings to msdfgen library

Primary LanguageRust

Safe bindings to msdfgen library

github crate docs MIT CI

Crates

  • msdfgen-sys Low-level unsafe bindings generated using bindgen.
  • msdfgen High-level safe bindings which should be used by applications.

Features

  • ttf-parse Enables ttf-parser crate integration which allows create shapes for glyphs of specific font.
  • font Enables font crate integration which allows create shapes for glyphs of specific font.
  • freetype-rs Enables freetype-rs crate integration which allows create shapes for glyphs of specific font.
  • png Enables png crate integration which allows load and save bitmaps from/as PNG images.
  • all Meta-feature which enables all supported features.

Usage

use std::fs::File;
use notosans::REGULAR_TTF as FONT;
use ttf_parser::Face;
use msdfgen::{FontExt, Bitmap, Gray, Range, MsdfGeneratorConfig, FillRule, MID_VALUE};

let font = Face::from_slice(&FONT, 0).unwrap();

let glyph = font.glyph_index('A').unwrap();

let mut shape = font.glyph_shape(glyph).unwrap();

let width = 32;
let height = 32;

let bound = shape.get_bound();
let framing = bound.autoframe(width, height, Range::Px(4.0), None).unwrap();
let fill_rule = FillRule::default();

let mut bitmap = Bitmap::new(width, height);

shape.edge_coloring_simple(3.0, 0);

let config = MsdfGeneratorConfig::default();

shape.generate_msdf(&mut bitmap, &framing, &config);

// optionally
shape.correct_sign(&mut bitmap, &framing, fill_rule);
shape.correct_msdf_error(&mut bitmap, &framing, &config);

let error = shape.estimate_error(&mut bitmap, &framing, 5, Default::default());

println!("Estimated error: {}", error);

bitmap.flip_y();

let mut output = File::create("A-letter-msdf.png").unwrap();
bitmap.write_png(&mut output).unwrap();

let mut preview = Bitmap::<Gray<f32>>::new(width * 10, height * 10);
bitmap.render(&mut preview, Default::default(), MID_VALUE);

let mut output = File::create("A-letter-preview.png").unwrap();
preview.write_png(&mut output).unwrap();