paper.js/test/tests/Color.js

/*
 * Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
 * http://paperjs.org/
 *
 * Copyright (c) 2011 - 2020, Jürg Lehni & Jonathan Puckey
 * http://juerglehni.com/ & https://puckey.studio/
 *
 * Distributed under the MIT license. See LICENSE file for details.
 *
 * All rights reserved.
 */

QUnit.module('Color');

test('Set named color', function() {
    var path = new Path();
    path.fillColor = 'red';
    equals(path.fillColor, new Color(1, 0, 0));
    equals(path.fillColor.toCSS(), 'rgb(255,0,0)');
});

test('Set color to hex', function() {
    var path = new Path();
    path.fillColor = '#ff0000';
    equals(path.fillColor, new Color(1, 0, 0));
    equals(path.fillColor.toCSS(), 'rgb(255,0,0)');

    var path = new Path();
    path.fillColor = '#f00';
    equals(path.fillColor, new Color(1, 0, 0));
    equals(path.fillColor.toCSS(), 'rgb(255,0,0)');
});

test('Set color to object', function() {
    var path = new Path();
    path.fillColor = { red: 1, green: 0, blue: 1};
    equals(path.fillColor, new Color(1, 0, 1));
    equals(path.fillColor.toCSS(), 'rgb(255,0,255)');

    var path = new Path();
    path.fillColor = { gray: 0.2 };
    equals(path.fillColor, new Color(0.2));
    equals(path.fillColor.toCSS(), 'rgb(51,51,51)');
});

test('Set color to array', function() {
    var path = new Path();
    path.fillColor = [1, 0, 0];
    equals(path.fillColor, new Color(1, 0, 0));
    equals(path.fillColor.toCSS(), 'rgb(255,0,0)');
});

test('Creating Colors', function() {
    equals(new Color(), new Color(0, 0, 0),
            'Color with no arguments should be black');

    equals(new Color('black'), new Color(0, 0, 0),
            'Color from name (black)');

    equals(new Color('red'), new Color(1, 0, 0),
            'Color from name (red)');

    equals(new Color('transparent'), new Color(0, 0, 0, 0),
            'Color from name (transparent)');

    equals(new Color('#ff0000'), new Color(1, 0, 0),
            'Color from hex string');

    equals(new Color('#FF3300'), new Color(1, 0.2, 0),
            'Color from uppercase hex string');

    equals(new Color('#f009'), new Color(1, 0, 0, .6),
        'Color from 4 characters hex code with alpha');

    equals(new Color('#ff000099'), new Color(1, 0, 0, .6),
        'Color from 8 characters hex code with alpha');

    equals(new Color('rgb(255, 0, 0)'), new Color(1, 0, 0),
            'Color from rgb() string');

    equals(new Color('rgba(255, 0, 0, 0.5)'), new Color(1, 0, 0, 0.5),
            'Color from rgba() string');

    equals(new Color('rgba( 255, 0, 0, 0.5 )'), new Color(1, 0, 0, 0.5),
            'Color from rgba() string 2nd test');

    equals(new Color('rgb(100%, 50%, 0%)'), new Color(1, 0.5, 0),
            'Color from rgb() percenst string');

    equals(new Color('hsl(180deg, 20%, 40%)'),
            new Color({ hue: 180, saturation: 0.2, lightness: 0.4 }),
            'Color from hsl() string');

    equals(new Color({ red: 1, green: 0, blue: 1}),
            new Color(1, 0, 1), 'Color from RGB object literal');

    equals(new Color({ gray: 0.2 }),
            new Color(0.2), 'Color from gray object literal');

    equals(new Color({ hue: 0, saturation: 1, brightness: 1}),
            new Color(1, 0, 0).convert('hsb'), 'Color from HSB object literal');

    equals(new Color([1, 0, 0]), new Color(1, 0, 0),
            'RGB Color from array');

    equals(new Color([1]), new Color(1),
            'Gray Color from array');
});

test('Get gray from RGB Color', function() {
    var color = new Color(1, 0.5, 0.2);
    equals(color.gray, 0.6152);

    var color = new Color(0.5, 0.2, 0.1);
    equals(color.gray, 0.27825);
});

test('Get gray from HSB Color', function() {
    var color = new Color({hue: 0, saturation: 0, brightness: 0.2 });
    equals(color.gray, 0.19998);
});

test('Get red from HSB Color', function() {
    var color = new Color({hue: 0, saturation: 1, brightness: 1 });
    equals(color.red, 1);
});

test('Get hue from RGB Color', function() {
    var color = new Color(1, 0, 0);
    equals(color.hue, 0);
    equals(color.saturation, 1);
});

test('Get gray after conversion', function() {
    var color = new Color(1);
    equals(color.gray, 1, 'color.gray');
    equals(color.red, 1, 'color.red');
    equals(color.blue, 1, 'color.blue');

    color.red = 0.5;
    equals(color.gray, 0.85045, 'color.gray');

    color.green = 0.2;

    equals(color.red, 0.5, 'color.red');
    equals(color.green, 0.2, 'color.green');
    equals(color.blue, 1, 'color.blue');

    equals(color.gray, 0.38085, 'color.gray');
});

test('Converting Colors', function() {
    var rgbColor = new Color(1, 0.5, 0.2);
    equals(rgbColor.gray, 0.6152);
    var grayColor = new Color(0.2);
    equals(grayColor.convert('rgb'), new Color(0.2, 0.2, 0.2));
    equals(grayColor.convert('hsb'),
            new Color({ hue: 0, saturation: 0, brightness: 0.2 }));
    equals(new Color(1, 0, 0).convert('hsb'),
            new Color({ hue: 0, saturation: 1, brightness: 1 }));
});

test('Setting Color#gray', function() {
    var color = new Color(1, 0.5, 0.2);
    color.gray = 0.1;
    equals(color, new Color(0.1));
});

test('Setting Color#red', function() {
    var color = new Color({ hue: 180, saturation: 0, brightness: 0 });
    color.red = 1;
    equals(color, new Color(1, 0, 0));
});

test('Setting Color#gray', function() {
    var color = new Color({ hue: 180, saturation: 0, brightness: 0 });
    color.gray = 0.5;
    equals(color, new Color(0.5));
});

test('Color.read()', function() {
    var color = Color.read([0, 0, 1]);
    equals(color, new Color(0, 0, 1));
});

test('Color#clone()', function() {
    var color = new Color(0, 0, 0);
    equals(function() {
        return color.clone() != color;
    }, true);

    equals(function() {
        return new Color(color) != color;
    }, true);
});

test('Color#convert()', function() {
    var color = new Color(0, 0, 0);
    var converted = color.convert('rgb');
    equals(function() {
        return converted !== color;
    }, true);
    equals(function() {
        return converted.equals(color);
    }, true);
});

test('Getting saturation from black RGB Color', function() {
    equals(function() {
        return new Color(0, 0, 0).saturation === 0;
    }, true);
});

test('Color#add()', function() {
    var color = new Color(0, 1, 1);
    equals(color.add([1, 0, 0]), new Color([1, 1, 1]));
    equals(color.add([1, 0.5, 0]), new Color([1, 1.5, 1]));
    var color = new Color(0, 0.5, 0);
    equals(color.add(0.5), new Color([0.5, 1, 0.5]));
});

test('Color#subtract()', function() {
    var color = new Color(0, 1, 1);
    equals(color.subtract([0, 1, 1]), new Color([0, 0, 0]));
    equals(color.subtract([0, 0.5, 1]), new Color([0, 0.5, 0]));
    var color = new Color(1, 1, 1);
    equals(color.subtract(0.5), new Color([0.5, 0.5, 0.5]));
});

test('Color#multiply()', function() {
    var color = new Color(1, 0.5, 0.25);
    equals(color.multiply([0.25, 0.5, 1]), new Color([0.25, 0.25, 0.25]));
    var color = new Color(1, 1, 1);
    equals(color.multiply(0.5), new Color([0.5, 0.5, 0.5]));
    var color = new Color(0.5, 0.5, 0.5);
    equals(color.multiply(2), new Color([1, 1, 1]));
});

test('Color#divide()', function() {
    var color = new Color(1, 1, 1);
    equals(color.divide([1, 2, 4]), new Color([1, 0.5, 0.25]));
    var color = new Color(1, 0.5, 0.25);
    equals(color.divide(0.25), new Color([4, 2, 1]));
    var color = new Color(1, 1, 1);
    equals(color.divide(4), new Color([0.25, 0.25, 0.25]));
});

test('Color#equals()', function() {
    var red = new Color('red');
    equals(function() {
        return new Color(1, 0, 0).equals(red);
    }, true);
    equals(function() {
        return new Color(1, 0, 0, 1).equals(red);
    }, true);
});

test('Gradient', function() {
    var stop1 = new GradientStop({ offset: 0.5 });
    var stop2 = new GradientStop('red', 0.75);
    var stop3 = new GradientStop(['white', 1]);
    var stop4 = new GradientStop({ rampPoint: 0.5 }); // deprecated
    var gradient = new Gradient([stop1, stop2, stop3], true);
    equals(function() { return stop1.color; }, new Color(0, 0, 0));
    equals(function() { return stop2.color; }, new Color(1, 0, 0));
    equals(function() { return stop3.color; }, new Color(1, 1, 1));
    equals(function() { return stop4.color; }, new Color(0, 0, 0));
    equals(function() { return stop1.offset; }, 0.5);
    equals(function() { return stop2.offset; }, 0.75);
    equals(function() { return stop3.offset; }, 1);
    equals(function() { return stop4.offset; }, 0.5);
});

test('Gradients with applyMatrix', function() {
    var topLeft = [100, 100];
    var bottomRight = [400, 400];
    var gradientColor = {
        gradient: {
            stops: ['yellow', 'red', 'blue']
        },
        origin: topLeft,
        destination: bottomRight
    }

    var path = new Path.Rectangle({
        topLeft: topLeft,
        bottomRight: bottomRight,
        fillColor: gradientColor,
        applyMatrix: true
    });

    var shape = new Shape.Rectangle({
        topLeft: topLeft,
        bottomRight: bottomRight,
        fillColor: gradientColor,
        applyMatrix: false
    });

    comparePixels(path, shape);

    path.scale(2);
    path.rotate(45);
    shape.scale(2);
    shape.rotate(45);

    comparePixels(path, shape);
});

test('Gradients with strokeScaling: false', function() {
    var topLeft = [100, 100];
    var bottomRight = [400, 400];
    var gradientColor = {
        gradient: {
            stops: ['yellow', 'red', 'blue']
        },
        origin: topLeft,
        destination: bottomRight
    }

    var path = new Shape.Rectangle({
        topLeft: topLeft,
        bottomRight: bottomRight,
        fillColor: gradientColor,
        strokeScaling: true
    });

    var shape = new Shape.Rectangle({
        topLeft: topLeft,
        bottomRight: bottomRight,
        fillColor: gradientColor,
        strokeScaling: false
    });

    comparePixels(path, shape);

    path.scale(2);
    path.rotate(45);
    shape.scale(2);
    shape.rotate(45);

    comparePixels(path, shape);
})

test('Modifying group.strokeColor for multiple children', function() {
    var item = new Group(new Path(), new Path());
    item.strokeColor = 'red';
    var strokeColor = item.strokeColor;
    item.strokeColor.hue = 50;
    equals(function() { return item.strokeColor !== undefined; }, true);
});