Crate roughr 

This crate is a rustlang port of Rough.js npm package written by @pshihn.

This package exposes functions to generate rough drawing primitives which looks like hand drawn sketches. This is the core create of operations to create rough drawings. It exposes its own primitive drawing types for lines curves, arcs, polygons, circles, ellipses and even svg paths. Works on Point2D type from euclid crate

On its own this crate can not draw on any context. One needs to use existing drawing libraries such as piet, raqote, tiny-skia etc in combination with roughr. In this workspace an example adapter is implemented for piet. Below examples are output of rough_piet adapter.

📦 Cargo.toml

[dependencies]
roughr = "0.1"

🔧 Example

Rectangle

let options = OptionsBuilder::default()
    .stroke(Srgba::from_raw(&[114u8, 87u8, 82u8, 255u8]).into_format())
    .fill(Srgba::from_raw(&[254u8, 246u8, 201u8, 255u8]).into_format())
    .fill_style(FillStyle::Hachure)
    .fill_weight(DPI * 0.01)
    .build()
    .unwrap();
let generator = KurboGenerator::new(options);
let rect_width = 100.0;
let rect_height = 50.0;
let rect = generator.rectangle::<f32>(
    (WIDTH as f32 - rect_width) / 2.0,
    (HEIGHT as f32 - rect_height) / 2.0,
    rect_width,
    rect_height,
);
let background_color = Color::from_hex_str("96C0B7").unwrap();

rc.fill(
    Rect::new(0.0, 0.0, WIDTH as f64, HEIGHT as f64),
    &background_color,
);
rect.draw(&mut rc);

🖨️ Output Rectangle

Circle

let options = OptionsBuilder::default()
    .stroke(Srgba::from_raw(&[114u8, 87u8, 82u8, 255u8]).into_format())
    .fill(Srgba::from_raw(&[254u8, 246u8, 201u8, 255u8]).into_format())
    .fill_style(FillStyle::Hachure)
    .fill_weight(DPI * 0.01)
    .build()
    .unwrap();
let generator = KurboGenerator::new(options);
let circle_paths = generator.circle::<f32>(
    (WIDTH as f32) / 2.0,
    (HEIGHT as f32) / 2.0,
    HEIGHT as f32 - 10.0f32,
);
let background_color = Color::from_hex_str("96C0B7").unwrap();

rc.fill(
    Rect::new(0.0, 0.0, WIDTH as f64, HEIGHT as f64),
    &background_color,
);
circle_paths.draw(&mut rc);

🖨️ Output Circle

Ellipse

let options = OptionsBuilder::default()
    .stroke(Srgba::from_raw(&[114u8, 87u8, 82u8, 255u8]).into_format())
    .fill(Srgba::from_raw(&[254u8, 246u8, 201u8, 255u8]).into_format())
    .fill_style(FillStyle::Hachure)
    .fill_weight(DPI * 0.01)
    .build()
    .unwrap();
let generator = KurboGenerator::new(options);
let ellipse_paths = generator.ellipse::<f32>(
    (WIDTH as f32) / 2.0,
    (HEIGHT as f32) / 2.0,
    WIDTH as f32 - 10.0,
    HEIGHT as f32 - 10.0,
);
let background_color = Color::from_hex_str("96C0B7").unwrap();

rc.fill(
    Rect::new(0.0, 0.0, WIDTH as f64, HEIGHT as f64),
    &background_color,
);
ellipse_paths.draw(&mut rc);

🖨️ Output Ellipse

Svg Path

let options = OptionsBuilder::default()
    .stroke(Srgba::from_raw(&[114u8, 87u8, 82u8, 255u8]).into_format())
    .fill(Srgba::from_raw(&[254u8, 246u8, 201u8, 255u8]).into_format())
    .fill_style(FillStyle::Hachure)
    .fill_weight(DPI * 0.01)
    .build()
    .unwrap();
let generator = KurboGenerator::new(options);
let heart_svg_path  = "M140 20C73 20 20 74 20 140c0 135 136 170 228 303 88-132 229-173 229-303 0-66-54-120-120-120-48 0-90 28-109 69-19-41-60-69-108-69z".into();
let heart_svg_path_drawing = generator.path::<f32>(heart_svg_path);
let background_color = Color::from_hex_str("96C0B7").unwrap();

rc.fill(
    Rect::new(0.0, 0.0, WIDTH as f64, HEIGHT as f64),
    &background_color,
);
heart_svg_path_drawing.draw(&mut rc);

🖨️ Output Svg Path

Filler Implementation Status

• Hachure
• Zigzag
• Cross-Hatch
• Dots
• Dashed
• Zigzag-Line

🔭 Examples

For more examples have a look at the examples folder.

Modules

core

filler

generator

geometry

points_on_path

renderer

Structs

Angle

Representation of the <angle> type.

AspectRatio

Representation of the preserveAspectRatio attribute.

Color

Representation of the <color> type.

FilterValueListParser

A pull-based <filter-value-list> parser.

FuncIRI

Representation of the <FuncIRI> type.

IRI

Representation of the <IRI> type.

Length

Representation of the <length> type.

LengthListParser

A pull-based <list-of-length> parser.

Number

An SVG number.

NumberListParser

A pull-based <list-of-numbers> parser.

PaintOrder

Representation of the paint-order property.

PathParser

A pull-based path data parser.

Point2D

A 2d Point tagged with a unit.

PointsParser

A pull-based <list-of-points> parser.

SimplifyingPathParser

A simplifying Path Data parser.

Transform

Representation of the <transform> type.

TransformListParser

A pull-based <transform-list> parser.

ViewBox

Representation of the <viewBox> type.

Enums

Align

Representation of the align value of the preserveAspectRatio attribute.

AngleUnit

List of all SVG angle units.

EnableBackground

Representation of the enable-background attribute.

Error

List of all errors.

FilterValue

Representation of the <filter-function> | <url> type.

FilterValueListParserError

A list of possible FilterValueListParser errors.

LengthUnit

List of all SVG length units.

Paint

Representation of the <paint> type.

PaintFallback

Representation of the fallback part of the <paint> type.

PaintOrderKind

paint-order property variants.

PathSegment

Representation of a path segment.

SimplePathSegment

Representation of a simple path segment.

TransformListToken

Transform list token.

ViewBoxError

List of possible ViewBox parsing errors.

Type Aliases

Srgba

Non-linear sRGB with an alpha component.