text: import { NumberExt } from '../util/number';
  export class Color {
      constructor(color, g, b, a) {
          if (color == null) {
              return this.set(255, 255, 255, 1);
          }
          if (typeof color === 'number') {
              return this.set(color, g, b, a);
          }
          if (typeof color === 'string') {
              return Color.fromString(color) || this;
          }
          if (Array.isArray(color)) {
              return this.set(color);
          }
          this.set(color.r, color.g, color.b, color.a == null ? 1 : color.a);
      }
      blend(start, end, weight) {
          this.set(start.r + (end.r - start.r) * weight, start.g + (end.g - start.g) * weight, start.b + (end.b - start.b) * weight, start.a + (end.a - start.a) * weight);
      }
      lighten(amount) {
          const rgba = Color.lighten(this.toArray(), amount);
          this.r = rgba[0];
          this.g = rgba[1];
          this.b = rgba[2];
          this.a = rgba[3];
      }
      darken(amount) {
          this.lighten(-amount);
      }
      set(arg0, arg1, arg2, arg3) {
          const r = Array.isArray(arg0) ? arg0[0] : arg0;
          const g = Array.isArray(arg0) ? arg0[1] : arg1;
          const b = Array.isArray(arg0) ? arg0[2] : arg2;
          const a = Array.isArray(arg0) ? arg0[3] : arg3;
          this.r = Math.round(NumberExt.clamp(r, 0, 255));
          this.g = Math.round(NumberExt.clamp(g, 0, 255));
          this.b = Math.round(NumberExt.clamp(b, 0, 255));
          this.a = a == null ? 1 : NumberExt.clamp(a, 0, 1);
          return this;
      }
      toHex() {
          const hex = ['r', 'g', 'b'].map((key) => {
              const str = this[key].toString(16);
              return str.length < 2 ? `0${str}` : str;
          });
          return `#${hex.join('')}`;
      }
      toRGBA() {
          return this.toArray();
      }
      toHSLA() {
          return Color.rgba2hsla(this.r, this.g, this.b, this.a);
      }
      toCSS(ignoreAlpha) {
          const rgb = `${this.r},${this.g},${this.b},`;
          return ignoreAlpha ? `rgb(${rgb})` : `rgba(${rgb},${this.a})`;
      }
      toGrey() {
          return Color.makeGrey(Math.round((this.r + this.g + this.b) / 3), this.a);
      }
      toArray() {
          return [this.r, this.g, this.b, this.a];
      }
      toString() {
          return this.toCSS();
      }
  }
  (function (Color) {
      function fromArray(arr) {
          return new Color(arr);
      }
      Color.fromArray = fromArray;
      function fromHex(color) {
          return new Color([...hex2rgb(color), 1]);
      }
      Color.fromHex = fromHex;
      function fromRGBA(color) {
          const matches = color.toLowerCase().match(/^rgba?\(([\s.,0-9]+)\)/);
          if (matches) {
              const arr = matches[1].split(/\s*,\s*/).map((v) => parseInt(v, 10));
              return new Color(arr);
          }
          return null;
      }
      Color.fromRGBA = fromRGBA;
      function hue2rgb(m1, m2, h) {
          if (h < 0) {
              ++h; // eslint-disable-line
          }
          if (h > 1) {
              --h; // eslint-disable-line
          }
          const h6 = 6 * h;
          if (h6 < 1) {
              return m1 + (m2 - m1) * h6;
          }
          if (2 * h < 1) {
              return m2;
          }
          if (3 * h < 2) {
              return m1 + (m2 - m1) * (2 / 3 - h) * 6;
          }
          return m1;
      }
      function fromHSLA(color) {
          const matches = color.toLowerCase().match(/^hsla?\(([\s.,0-9]+)\)/);
          if (matches) {
              const arr = matches[2].split(/\s*,\s*/);
              const h = (((parseFloat(arr[0]) % 360) + 360) % 360) / 360;
              const s = parseFloat(arr[1]) / 100;
              const l = parseFloat(arr[2]) / 100;
              const a = arr[3] == null ? 1 : parseInt(arr[3], 10);
              return new Color(hsla2rgba(h, s, l, a));
          }
          return null;
      }
      Color.fromHSLA = fromHSLA;
      function fromString(color) {
          if (color.startsWith('#')) {
              return fromHex(color);
          }
          if (color.startsWith('rgb')) {
              return fromRGBA(color);
          }
          const preset = Color.named[color];
          if (preset) {
              return fromHex(preset);
          }
          return fromHSLA(color);
      }
      Color.fromString = fromString;
      function makeGrey(g, a) {
          return Color.fromArray([g, g, g, a]);
      }
      Color.makeGrey = makeGrey;
      function rgba2hsla(arg0, arg1, arg2, arg3) {
          const r = Array.isArray(arg0) ? arg0[0] : arg0;
          const g = Array.isArray(arg0) ? arg0[1] : arg1;
          const b = Array.isArray(arg0) ? arg0[2] : arg2;
          const a = Array.isArray(arg0) ? arg0[3] : arg3;
          const max = Math.max(r, g, b);
          const min = Math.min(r, g, b);
          const l = (max + min) / 2;
          let h = 0;
          let s = 0;
          if (min !== max) {
              const d = max - min;
              s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
              switch (max) {
                  case r:
                      h = (g - b) / d + (g < b ? 6 : 0);
                      break;
                  case g:
                      h = (b - r) / d + 2;
                      break;
                  case b:
                      h = (r - g) / d + 4;
                      break;
                  default:
                      break;
              }
              h /= 6;
          }
          return [h, s, l, a == null ? 1 : a];
      }
      Color.rgba2hsla = rgba2hsla;
      function hsla2rgba(arg0, arg1, arg2, arg3) {
          const h = Array.isArray(arg0) ? arg0[0] : arg0;
          const s = Array.isArray(arg0) ? arg0[1] : arg1;
          const l = Array.isArray(arg0) ? arg0[2] : arg2;
          const a = Array.isArray(arg0) ? arg0[3] : arg3;
          const m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;
          const m1 = 2 * l - m2;
          return [
              hue2rgb(m1, m2, h + 1 / 3) * 256,
              hue2rgb(m1, m2, h) * 256,
              hue2rgb(m1, m2, h - 1 / 3) * 256,
              a == null ? 1 : a,
          ];
      }
      Color.hsla2rgba = hsla2rgba;
      function random(ignoreAlpha) {
          return new Color(Math.round(Math.random() * 256), Math.round(Math.random() * 256), Math.round(Math.random() * 256), ignoreAlpha ? undefined : parseFloat(Math.random().toFixed(2)));
      }
      Color.random = random;
      function randomHex() {
          const letters = '0123456789ABCDEF';
          let color = '#';
          for (let i = 0; i < 6; i += 1) {
              color += letters[Math.floor(Math.random() * 16)];
          }
          return color;
      }
      Color.randomHex = randomHex;
      function randomRGBA(ignoreAlpha) {
          return random(ignoreAlpha).toString();
      }
      Color.randomRGBA = randomRGBA;
      function invert(color, bw) {
          if (typeof color === 'string') {
              const pound = color[0] === '#';
              const [r, g, b] = hex2rgb(color);
              if (bw) {
                  // http://stackoverflow.com/a/3943023/112731
                  return r * 0.299 + g * 0.587 + b * 0.114 > 186 ? '#000000' : '#ffffff';
              }
              return `${pound ? '#' : ''}${rgb2hex(255 - r, 255 - g, 255 - b)}`;
          }
          const r = color[0];
          const g = color[1];
          const b = color[2];
          const a = color[3];
          if (bw) {
              return r * 0.299 + g * 0.587 + b * 0.114 > 186
                  ? [0, 0, 0, a]
                  : [255, 255, 255, a];
          }
          return [255 - r, 255 - g, 255 - b, a];
      }
      Color.invert = invert;
      function hex2rgb(hex) {
          const color = hex.indexOf('#') === 0 ? hex : `#${hex}`;
          let val = Number(`0x${color.substr(1)}`);
          if (!(color.length === 4 || color.length === 7) || Number.isNaN(val)) {
              throw new Error('Invalid hex color.');
          }
          const bits = color.length === 4 ? 4 : 8;
          const mask = (1 << bits) - 1;
          const bgr = ['b', 'g', 'r'].map(() => {
              const c = val & mask;
              val >>= bits;
              return bits === 4 ? 17 * c : c;
          });
          return [bgr[2], bgr[1], bgr[0]];
      }
      function rgb2hex(r, g, b) {
          const pad = (hex) => (hex.length < 2 ? `0${hex}` : hex);
          return `${pad(r.toString(16))}${pad(g.toString(16))}${pad(b.toString(16))}`;
      }
      function lighten(color, amt) {
          return lum(color, amt);
      }
      Color.lighten = lighten;
      function darken(color, amt) {
          return lum(color, -amt);
      }
      Color.darken = darken;
      function lum(color, amt) {
          if (typeof color === 'string') {
              const pound = color[0] === '#';
              const num = parseInt(pound ? color.substr(1) : color, 16);
              const r = NumberExt.clamp((num >> 16) + amt, 0, 255);
              const g = NumberExt.clamp(((num >> 8) & 0x00ff) + amt, 0, 255);
              const b = NumberExt.clamp((num & 0x0000ff) + amt, 0, 255);
              return `${pound ? '#' : ''}${(b | (g << 8) | (r << 16)).toString(16)}`;
          }
          const hex = rgb2hex(color[0], color[1], color[2]);
          const arr = hex2rgb(lum(hex, amt));
          return [arr[0], arr[1], arr[2], color[3]];
      }
  })(Color || (Color = {}));
  (function (Color) {
      Color.named = {
          aliceblue: '#f0f8ff',
          antiquewhite: '#faebd7',
          aqua: '#00ffff',
          aquamarine: '#7fffd4',
          azure: '#f0ffff',
          beige: '#f5f5dc',
          bisque: '#ffe4c4',
          black: '#000000',
          blanchedalmond: '#ffebcd',
          blue: '#0000ff',
          blueviolet: '#8a2be2',
          brown: '#a52a2a',
          burlywood: '#deb887',
          burntsienna: '#ea7e5d',
          cadetblue: '#5f9ea0',
          chartreuse: '#7fff00',
          chocolate: '#d2691e',
          coral: '#ff7f50',
          cornflowerblue: '#6495ed',
          cornsilk: '#fff8dc',
          crimson: '#dc143c',
          cyan: '#00ffff',
          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',
          fuchsia: '#ff00ff',
          gainsboro: '#dcdcdc',
          ghostwhite: '#f8f8ff',
          gold: '#ffd700',
          goldenrod: '#daa520',
          gray: '#808080',
          green: '#008000',
          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',
          lime: '#00ff00',
          limegreen: '#32cd32',
          linen: '#faf0e6',
          magenta: '#ff00ff',
          maroon: '#800000',
          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',
          navy: '#000080',
          oldlace: '#fdf5e6',
          olive: '#808000',
          olivedrab: '#6b8e23',
          orange: '#ffa500',
          orangered: '#ff4500',
          orchid: '#da70d6',
          palegoldenrod: '#eee8aa',
          palegreen: '#98fb98',
          paleturquoise: '#afeeee',
          palevioletred: '#db7093',
          papayawhip: '#ffefd5',
          peachpuff: '#ffdab9',
          peru: '#cd853f',
          pink: '#ffc0cb',
          plum: '#dda0dd',
          powderblue: '#b0e0e6',
          purple: '#800080',
          rebeccapurple: '#663399',
          red: '#ff0000',
          rosybrown: '#bc8f8f',
          royalblue: '#4169e1',
          saddlebrown: '#8b4513',
          salmon: '#fa8072',
          sandybrown: '#f4a460',
          seagreen: '#2e8b57',
          seashell: '#fff5ee',
          sienna: '#a0522d',
          silver: '#c0c0c0',
          skyblue: '#87ceeb',
          slateblue: '#6a5acd',
          slategray: '#708090',
          slategrey: '#708090',
          snow: '#fffafa',
          springgreen: '#00ff7f',
          steelblue: '#4682b4',
          tan: '#d2b48c',
          teal: '#008080',
          thistle: '#d8bfd8',
          tomato: '#ff6347',
          turquoise: '#40e0d0',
          violet: '#ee82ee',
          wheat: '#f5deb3',
          white: '#ffffff',
          whitesmoke: '#f5f5f5',
          yellow: '#ffff00',
          yellowgreen: '#9acd32',
      };
  })(Color || (Color = {}));
  //# sourceMappingURL=color.js.map