blaze-2d
Version:
A fast and simple WebGL 2 2D game engine written in TypeScript
314 lines • 10.6 kB
JavaScript
import Logger from "../logger";
/**
* Represents a color value such as `rgba(255, 1, 100, 255)`, `#FEFEFE` or `lightblue` to allow for easy conversion between color representations
*/
export default class Color {
/**
* Creates a {@link Color} instance from a {@link ColorLike} representation.
*
* @param color The {@link ColorLike} representation to use when creating the {@link Color} instance
*/
constructor(color) {
this.html = {
black: "#000000",
silver: "#c0c0c0",
gray: "#808080",
white: "#ffffff",
maroon: "#800000",
red: "#ff0000",
purple: "#800080",
fuchsia: "#ff00ff",
green: "#008000",
lime: "#00ff00",
olive: "#808000",
yellow: "#ffff00",
navy: "#000080",
blue: "#0000ff",
teal: "#008080",
aqua: "#00ffff",
orange: "#ffa500",
aliceblue: "#f0f8ff",
antiquewhite: "#faebd7",
aquamarine: "#7fffd4",
azure: "#f0ffff",
beige: "#f5f5dc",
bisque: "#ffe4c4",
blanchedalmond: "#ffebcd",
blueviolet: "#8a2be2",
brown: "#a52a2a",
burlywood: "#deb887",
cadetblue: "#5f9ea0",
chartreuse: "#7fff00",
chocolate: "#d2691e",
coral: "#ff7f50",
cornflowerblue: "#6495ed",
cornsilk: "#fff8dc",
crimson: "#dc143c",
darkblue: "#00008b",
darkcyan: "#008b8b",
darkgoldenrod: "#b8860b",
darkgray: "#a9a9a9",
darkgreen: "#006400",
darkgrey: "#a9a9a9",
darkkhaki: "#bdb76b",
darkmagenta: "#8b008b",
darkolivegreen: "#556b2f",
darkorange: "#ff8c00",
darkorchid: "#9932cc",
darkred: "#8b0000",
darksalmon: "#e9967a",
darkseagreen: "#8fbc8f",
darkslateblue: "#483d8b",
darkslategray: "#2f4f4f",
darkslategrey: "#2f4f4f",
darkturquoise: "#00ced1",
darkviolet: "#9400d3",
deeppink: "#ff1493",
deepskyblue: "#00bfff",
dimgray: "#696969",
dimgrey: "#696969",
dodgerblue: "#1e90ff",
firebrick: "#b22222",
floralwhite: "#fffaf0",
forestgreen: "#228b22",
gainsboro: "#dcdcdc",
ghostwhite: "#f8f8ff",
gold: "#ffd700",
goldenrod: "#daa520",
greenyellow: "#adff2f",
grey: "#808080",
honeydew: "#f0fff0",
hotpink: "#ff69b4",
indianred: "#cd5c5c",
indigo: "#4b0082",
ivory: "#fffff0",
khaki: "#f0e68c",
lavender: "#e6e6fa",
lavenderblush: "#fff0f5",
lawngreen: "#7cfc00",
lemonchiffon: "#fffacd",
lightblue: "#add8e6",
lightcoral: "#f08080",
lightcyan: "#e0ffff",
lightgoldenrodyellow: "#fafad2",
lightgray: "#d3d3d3",
lightgreen: "#90ee90",
lightgrey: "#d3d3d3",
lightpink: "#ffb6c1",
lightsalmon: "#ffa07a",
lightseagreen: "#20b2aa",
lightskyblue: "#87cefa",
lightslategray: "#778899",
lightslategrey: "#778899",
lightsteelblue: "#b0c4de",
lightyellow: "#ffffe0",
limegreen: "#32cd32",
linen: "#faf0e6",
mediumaquamarine: "#66cdaa",
mediumblue: "#0000cd",
mediumorchid: "#ba55d3",
mediumpurple: "#9370db",
mediumseagreen: "#3cb371",
mediumslateblue: "#7b68ee",
mediumspringgreen: "#00fa9a",
mediumturquoise: "#48d1cc",
mediumvioletred: "#c71585",
midnightblue: "#191970",
mintcream: "#f5fffa",
mistyrose: "#ffe4e1",
moccasin: "#ffe4b5",
navajowhite: "#ffdead",
oldlace: "#fdf5e6",
olivedrab: "#6b8e23",
orangered: "#ff4500",
orchid: "#da70d6",
palegoldenrod: "#eee8aa",
palegreen: "#98fb98",
paleturquoise: "#afeeee",
palevioletred: "#db7093",
papayawhip: "#ffefd5",
peachpuff: "#ffdab9",
peru: "#cd853f",
pink: "#ffc0cb",
plum: "#dda0dd",
powderblue: "#b0e0e6",
rosybrown: "#bc8f8f",
royalblue: "#4169e1",
saddlebrown: "#8b4513",
salmon: "#fa8072",
sandybrown: "#f4a460",
seagreen: "#2e8b57",
seashell: "#fff5ee",
sienna: "#a0522d",
skyblue: "#87ceeb",
slateblue: "#6a5acd",
slategray: "#708090",
slategrey: "#708090",
snow: "#fffafa",
springgreen: "#00ff7f",
steelblue: "#4682b4",
tan: "#d2b48c",
thistle: "#d8bfd8",
tomato: "#ff6347",
turquoise: "#40e0d0",
violet: "#ee82ee",
wheat: "#f5deb3",
whitesmoke: "#f5f5f5",
yellowgreen: "#9acd32",
rebeccapurple: "#663399",
};
let valid = false;
if (typeof color === "object") {
valid = this.validateRGBA(color);
if (valid)
this.parseRGBA(color);
}
else if (color[0] === "#") {
valid = this.validateHEX(color);
if (valid)
this.parseHEX(color);
}
else {
valid = this.validateHTML(color);
if (valid)
this.parseHTML(color);
}
if (!valid)
throw Logger.error("Color", `'${color}' is not a valid color representation.`);
}
/**
* Validates a rgba color.
*
* @param color The rgba color to validate
* @returns Wether or not the `color` is a valid rgba color
*/
validateRGBA(color) {
if (color.r < 0 || color.r > 255)
return false;
if (color.g < 0 || color.g > 255)
return false;
if (color.b < 0 || color.b > 255)
return false;
if (color.a && (color.a < 0 || color.a > 1))
return false;
let expected = 3;
if (color.a)
expected++;
if (Object.keys(color).length !== expected)
return false;
return true;
}
/**
* Validates a hex color.
*
* @param color The hex color to validate
* @returns Wether or not the `color` is a valid hex color
*/
validateHEX(color) {
const hexRegex = /^#(([0-9A-F]){8}|([0-9A-F]{3}){1,2})$/i;
return hexRegex.test(color);
}
/**
* Validates a html color.
*
* @param color The html color to validate
* @returns Wether or not the `color` is a valid html color
*/
validateHTML(color) {
return Object.keys(this.html).includes(color);
}
/**
* Takes in a rgba color then converts it to hex and webgl and stores the conversions.
*
* @param color The rgba color to parse
*/
parseRGBA(color) {
this.original = Object.assign({}, color);
color.a = color.a !== undefined ? color.a : 1;
this.rgba = color;
this.hex = this.rgbaToHex(color);
this.webgl = this.rgbaToWebGL(color);
}
/**
* Takes in a hex color then converts it to rgba and webgl and stores the conversions.
*
* @param color The hex color to parse
*/
parseHEX(color) {
this.original = color;
this.rgba = this.hexToRgba(color);
this.hex = color;
this.webgl = this.rgbaToWebGL(this.rgba);
}
/**
* Takes in a html color then converts it to hex, rgba and webgl and stores the conversions.
*
* @param color The html color to parse
*/
parseHTML(color) {
this.original = color;
this.hex = this.html[color];
this.rgba = this.hexToRgba(this.hex);
this.webgl = this.rgbaToWebGL(this.rgba);
}
/**
* Converts a valid hex color to rgba.
*
* @param hex The hex color to convert to rgba
* @returns The rgba equivalent of the hex color
*
* @throws When an invalid hex color is provided
*/
hexToRgba(hex) {
if (!this.validateHEX(hex))
return void Logger.error("Color", "Invalid hex color provided in hexToRgba.");
let fixed = hex.substr(1);
if (fixed.length === 3)
fixed += fixed + "FF";
else if (fixed.length === 6)
fixed += "FF";
const rHex = fixed.substr(0, 2);
const gHex = fixed.substr(2, 2);
const bHex = fixed.substr(4, 2);
const aHex = fixed.substr(6, 2);
return {
r: parseInt(rHex, 16),
g: parseInt(gHex, 16),
b: parseInt(bHex, 16),
a: parseInt(aHex, 16) / 255,
};
}
/**
* Converts a valid rgba color to hex.
*
* @param rgba The rgba color to convert to hex
* @returns The hex equivalent of the rgba color
*
* @throws When an invalid rgba color is provided
*/
rgbaToHex(rgba) {
if (!this.validateRGBA(rgba))
return void Logger.error("Color", "Invalid rgba color provided in rgbaToHex.");
const rHex = rgba.r.toString(16).padStart(2, "0");
const bHex = rgba.g.toString(16).padStart(2, "0");
const gHex = rgba.b.toString(16).padStart(2, "0");
let alpha = rgba.a !== undefined ? rgba.a : 1;
alpha *= 255;
const aHex = Math.floor(alpha).toString(16).padStart(2, "0");
return `#${rHex}${bHex}${gHex}${aHex}`;
}
/**
* Converts a valid rgba color to webgl.
*
* @param rgba The rgba color to convert to a webgl color representation
* @returns The webgl equivalent of the rgba color
*
* @throws When an invalid rgba color is provided
*/
rgbaToWebGL(rgba) {
if (!this.validateRGBA(rgba))
return void Logger.error("Color", "Invalid rgba color provided in rgbaToWebGL.");
return [this.rgba.r / 255, this.rgba.g / 255, this.rgba.b / 255, this.rgba.a !== undefined ? this.rgba.a : 1];
}
}
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