1 line
18 KiB
JSON
1 line
18 KiB
JSON
{"ast":null,"code":"/* MIT license */\nvar cssKeywords = require('color-name'); // NOTE: conversions should only return primitive values (i.e. arrays, or\n// values that give correct `typeof` results).\n// do not use box values types (i.e. Number(), String(), etc.)\n\n\nvar reverseKeywords = {};\n\nfor (var key in cssKeywords) {\n if (cssKeywords.hasOwnProperty(key)) {\n reverseKeywords[cssKeywords[key]] = key;\n }\n}\n\nvar convert = module.exports = {\n rgb: {\n channels: 3,\n labels: 'rgb'\n },\n hsl: {\n channels: 3,\n labels: 'hsl'\n },\n hsv: {\n channels: 3,\n labels: 'hsv'\n },\n hwb: {\n channels: 3,\n labels: 'hwb'\n },\n cmyk: {\n channels: 4,\n labels: 'cmyk'\n },\n xyz: {\n channels: 3,\n labels: 'xyz'\n },\n lab: {\n channels: 3,\n labels: 'lab'\n },\n lch: {\n channels: 3,\n labels: 'lch'\n },\n hex: {\n channels: 1,\n labels: ['hex']\n },\n keyword: {\n channels: 1,\n labels: ['keyword']\n },\n ansi16: {\n channels: 1,\n labels: ['ansi16']\n },\n ansi256: {\n channels: 1,\n labels: ['ansi256']\n },\n hcg: {\n channels: 3,\n labels: ['h', 'c', 'g']\n },\n apple: {\n channels: 3,\n labels: ['r16', 'g16', 'b16']\n },\n gray: {\n channels: 1,\n labels: ['gray']\n }\n}; // hide .channels and .labels properties\n\nfor (var model in convert) {\n if (convert.hasOwnProperty(model)) {\n if (!('channels' in convert[model])) {\n throw new Error('missing channels property: ' + model);\n }\n\n if (!('labels' in convert[model])) {\n throw new Error('missing channel labels property: ' + model);\n }\n\n if (convert[model].labels.length !== convert[model].channels) {\n throw new Error('channel and label counts mismatch: ' + model);\n }\n\n var channels = convert[model].channels;\n var labels = convert[model].labels;\n delete convert[model].channels;\n delete convert[model].labels;\n Object.defineProperty(convert[model], 'channels', {\n value: channels\n });\n Object.defineProperty(convert[model], 'labels', {\n value: labels\n });\n }\n}\n\nconvert.rgb.hsl = function (rgb) {\n var r = rgb[0] / 255;\n var g = rgb[1] / 255;\n var b = rgb[2] / 255;\n var min = Math.min(r, g, b);\n var max = Math.max(r, g, b);\n var delta = max - min;\n var h;\n var s;\n var l;\n\n if (max === min) {\n h = 0;\n } else if (r === max) {\n h = (g - b) / delta;\n } else if (g === max) {\n h = 2 + (b - r) / delta;\n } else if (b === max) {\n h = 4 + (r - g) / delta;\n }\n\n h = Math.min(h * 60, 360);\n\n if (h < 0) {\n h += 360;\n }\n\n l = (min + max) / 2;\n\n if (max === min) {\n s = 0;\n } else if (l <= 0.5) {\n s = delta / (max + min);\n } else {\n s = delta / (2 - max - min);\n }\n\n return [h, s * 100, l * 100];\n};\n\nconvert.rgb.hsv = function (rgb) {\n var rdif;\n var gdif;\n var bdif;\n var h;\n var s;\n var r = rgb[0] / 255;\n var g = rgb[1] / 255;\n var b = rgb[2] / 255;\n var v = Math.max(r, g, b);\n var diff = v - Math.min(r, g, b);\n\n var diffc = function diffc(c) {\n return (v - c) / 6 / diff + 1 / 2;\n };\n\n if (diff === 0) {\n h = s = 0;\n } else {\n s = diff / v;\n rdif = diffc(r);\n gdif = diffc(g);\n bdif = diffc(b);\n\n if (r === v) {\n h = bdif - gdif;\n } else if (g === v) {\n h = 1 / 3 + rdif - bdif;\n } else if (b === v) {\n h = 2 / 3 + gdif - rdif;\n }\n\n if (h < 0) {\n h += 1;\n } else if (h > 1) {\n h -= 1;\n }\n }\n\n return [h * 360, s * 100, v * 100];\n};\n\nconvert.rgb.hwb = function (rgb) {\n var r = rgb[0];\n var g = rgb[1];\n var b = rgb[2];\n var h = convert.rgb.hsl(rgb)[0];\n var w = 1 / 255 * Math.min(r, Math.min(g, b));\n b = 1 - 1 / 255 * Math.max(r, Math.max(g, b));\n return [h, w * 100, b * 100];\n};\n\nconvert.rgb.cmyk = function (rgb) {\n var r = rgb[0] / 255;\n var g = rgb[1] / 255;\n var b = rgb[2] / 255;\n var c;\n var m;\n var y;\n var k;\n k = Math.min(1 - r, 1 - g, 1 - b);\n c = (1 - r - k) / (1 - k) || 0;\n m = (1 - g - k) / (1 - k) || 0;\n y = (1 - b - k) / (1 - k) || 0;\n return [c * 100, m * 100, y * 100, k * 100];\n};\n/**\n * See https://en.m.wikipedia.org/wiki/Euclidean_distance#Squared_Euclidean_distance\n * */\n\n\nfunction comparativeDistance(x, y) {\n return Math.pow(x[0] - y[0], 2) + Math.pow(x[1] - y[1], 2) + Math.pow(x[2] - y[2], 2);\n}\n\nconvert.rgb.keyword = function (rgb) {\n var reversed = reverseKeywords[rgb];\n\n if (reversed) {\n return reversed;\n }\n\n var currentClosestDistance = Infinity;\n var currentClosestKeyword;\n\n for (var keyword in cssKeywords) {\n if (cssKeywords.hasOwnProperty(keyword)) {\n var value = cssKeywords[keyword]; // Compute comparative distance\n\n var distance = comparativeDistance(rgb, value); // Check if its less, if so set as closest\n\n if (distance < currentClosestDistance) {\n currentClosestDistance = distance;\n currentClosestKeyword = keyword;\n }\n }\n }\n\n return currentClosestKeyword;\n};\n\nconvert.keyword.rgb = function (keyword) {\n return cssKeywords[keyword];\n};\n\nconvert.rgb.xyz = function (rgb) {\n var r = rgb[0] / 255;\n var g = rgb[1] / 255;\n var b = rgb[2] / 255; // assume sRGB\n\n r = r > 0.04045 ? Math.pow((r + 0.055) / 1.055, 2.4) : r / 12.92;\n g = g > 0.04045 ? Math.pow((g + 0.055) / 1.055, 2.4) : g / 12.92;\n b = b > 0.04045 ? Math.pow((b + 0.055) / 1.055, 2.4) : b / 12.92;\n var x = r * 0.4124 + g * 0.3576 + b * 0.1805;\n var y = r * 0.2126 + g * 0.7152 + b * 0.0722;\n var z = r * 0.0193 + g * 0.1192 + b * 0.9505;\n return [x * 100, y * 100, z * 100];\n};\n\nconvert.rgb.lab = function (rgb) {\n var xyz = convert.rgb.xyz(rgb);\n var x = xyz[0];\n var y = xyz[1];\n var z = xyz[2];\n var l;\n var a;\n var b;\n x /= 95.047;\n y /= 100;\n z /= 108.883;\n x = x > 0.008856 ? Math.pow(x, 1 / 3) : 7.787 * x + 16 / 116;\n y = y > 0.008856 ? Math.pow(y, 1 / 3) : 7.787 * y + 16 / 116;\n z = z > 0.008856 ? Math.pow(z, 1 / 3) : 7.787 * z + 16 / 116;\n l = 116 * y - 16;\n a = 500 * (x - y);\n b = 200 * (y - z);\n return [l, a, b];\n};\n\nconvert.hsl.rgb = function (hsl) {\n var h = hsl[0] / 360;\n var s = hsl[1] / 100;\n var l = hsl[2] / 100;\n var t1;\n var t2;\n var t3;\n var rgb;\n var val;\n\n if (s === 0) {\n val = l * 255;\n return [val, val, val];\n }\n\n if (l < 0.5) {\n t2 = l * (1 + s);\n } else {\n t2 = l + s - l * s;\n }\n\n t1 = 2 * l - t2;\n rgb = [0, 0, 0];\n\n for (var i = 0; i < 3; i++) {\n t3 = h + 1 / 3 * -(i - 1);\n\n if (t3 < 0) {\n t3++;\n }\n\n if (t3 > 1) {\n t3--;\n }\n\n if (6 * t3 < 1) {\n val = t1 + (t2 - t1) * 6 * t3;\n } else if (2 * t3 < 1) {\n val = t2;\n } else if (3 * t3 < 2) {\n val = t1 + (t2 - t1) * (2 / 3 - t3) * 6;\n } else {\n val = t1;\n }\n\n rgb[i] = val * 255;\n }\n\n return rgb;\n};\n\nconvert.hsl.hsv = function (hsl) {\n var h = hsl[0];\n var s = hsl[1] / 100;\n var l = hsl[2] / 100;\n var smin = s;\n var lmin = Math.max(l, 0.01);\n var sv;\n var v;\n l *= 2;\n s *= l <= 1 ? l : 2 - l;\n smin *= lmin <= 1 ? lmin : 2 - lmin;\n v = (l + s) / 2;\n sv = l === 0 ? 2 * smin / (lmin + smin) : 2 * s / (l + s);\n return [h, sv * 100, v * 100];\n};\n\nconvert.hsv.rgb = function (hsv) {\n var h = hsv[0] / 60;\n var s = hsv[1] / 100;\n var v = hsv[2] / 100;\n var hi = Math.floor(h) % 6;\n var f = h - Math.floor(h);\n var p = 255 * v * (1 - s);\n var q = 255 * v * (1 - s * f);\n var t = 255 * v * (1 - s * (1 - f));\n v *= 255;\n\n switch (hi) {\n case 0:\n return [v, t, p];\n\n case 1:\n return [q, v, p];\n\n case 2:\n return [p, v, t];\n\n case 3:\n return [p, q, v];\n\n case 4:\n return [t, p, v];\n\n case 5:\n return [v, p, q];\n }\n};\n\nconvert.hsv.hsl = function (hsv) {\n var h = hsv[0];\n var s = hsv[1] / 100;\n var v = hsv[2] / 100;\n var vmin = Math.max(v, 0.01);\n var lmin;\n var sl;\n var l;\n l = (2 - s) * v;\n lmin = (2 - s) * vmin;\n sl = s * vmin;\n sl /= lmin <= 1 ? lmin : 2 - lmin;\n sl = sl || 0;\n l /= 2;\n return [h, sl * 100, l * 100];\n}; // http://dev.w3.org/csswg/css-color/#hwb-to-rgb\n\n\nconvert.hwb.rgb = function (hwb) {\n var h = hwb[0] / 360;\n var wh = hwb[1] / 100;\n var bl = hwb[2] / 100;\n var ratio = wh + bl;\n var i;\n var v;\n var f;\n var n; // wh + bl cant be > 1\n\n if (ratio > 1) {\n wh /= ratio;\n bl /= ratio;\n }\n\n i = Math.floor(6 * h);\n v = 1 - bl;\n f = 6 * h - i;\n\n if ((i & 0x01) !== 0) {\n f = 1 - f;\n }\n\n n = wh + f * (v - wh); // linear interpolation\n\n var r;\n var g;\n var b;\n\n switch (i) {\n default:\n case 6:\n case 0:\n r = v;\n g = n;\n b = wh;\n break;\n\n case 1:\n r = n;\n g = v;\n b = wh;\n break;\n\n case 2:\n r = wh;\n g = v;\n b = n;\n break;\n\n case 3:\n r = wh;\n g = n;\n b = v;\n break;\n\n case 4:\n r = n;\n g = wh;\n b = v;\n break;\n\n case 5:\n r = v;\n g = wh;\n b = n;\n break;\n }\n\n return [r * 255, g * 255, b * 255];\n};\n\nconvert.cmyk.rgb = function (cmyk) {\n var c = cmyk[0] / 100;\n var m = cmyk[1] / 100;\n var y = cmyk[2] / 100;\n var k = cmyk[3] / 100;\n var r;\n var g;\n var b;\n r = 1 - Math.min(1, c * (1 - k) + k);\n g = 1 - Math.min(1, m * (1 - k) + k);\n b = 1 - Math.min(1, y * (1 - k) + k);\n return [r * 255, g * 255, b * 255];\n};\n\nconvert.xyz.rgb = function (xyz) {\n var x = xyz[0] / 100;\n var y = xyz[1] / 100;\n var z = xyz[2] / 100;\n var r;\n var g;\n var b;\n r = x * 3.2406 + y * -1.5372 + z * -0.4986;\n g = x * -0.9689 + y * 1.8758 + z * 0.0415;\n b = x * 0.0557 + y * -0.2040 + z * 1.0570; // assume sRGB\n\n r = r > 0.0031308 ? 1.055 * Math.pow(r, 1.0 / 2.4) - 0.055 : r * 12.92;\n g = g > 0.0031308 ? 1.055 * Math.pow(g, 1.0 / 2.4) - 0.055 : g * 12.92;\n b = b > 0.0031308 ? 1.055 * Math.pow(b, 1.0 / 2.4) - 0.055 : b * 12.92;\n r = Math.min(Math.max(0, r), 1);\n g = Math.min(Math.max(0, g), 1);\n b = Math.min(Math.max(0, b), 1);\n return [r * 255, g * 255, b * 255];\n};\n\nconvert.xyz.lab = function (xyz) {\n var x = xyz[0];\n var y = xyz[1];\n var z = xyz[2];\n var l;\n var a;\n var b;\n x /= 95.047;\n y /= 100;\n z /= 108.883;\n x = x > 0.008856 ? Math.pow(x, 1 / 3) : 7.787 * x + 16 / 116;\n y = y > 0.008856 ? Math.pow(y, 1 / 3) : 7.787 * y + 16 / 116;\n z = z > 0.008856 ? Math.pow(z, 1 / 3) : 7.787 * z + 16 / 116;\n l = 116 * y - 16;\n a = 500 * (x - y);\n b = 200 * (y - z);\n return [l, a, b];\n};\n\nconvert.lab.xyz = function (lab) {\n var l = lab[0];\n var a = lab[1];\n var b = lab[2];\n var x;\n var y;\n var z;\n y = (l + 16) / 116;\n x = a / 500 + y;\n z = y - b / 200;\n var y2 = Math.pow(y, 3);\n var x2 = Math.pow(x, 3);\n var z2 = Math.pow(z, 3);\n y = y2 > 0.008856 ? y2 : (y - 16 / 116) / 7.787;\n x = x2 > 0.008856 ? x2 : (x - 16 / 116) / 7.787;\n z = z2 > 0.008856 ? z2 : (z - 16 / 116) / 7.787;\n x *= 95.047;\n y *= 100;\n z *= 108.883;\n return [x, y, z];\n};\n\nconvert.lab.lch = function (lab) {\n var l = lab[0];\n var a = lab[1];\n var b = lab[2];\n var hr;\n var h;\n var c;\n hr = Math.atan2(b, a);\n h = hr * 360 / 2 / Math.PI;\n\n if (h < 0) {\n h += 360;\n }\n\n c = Math.sqrt(a * a + b * b);\n return [l, c, h];\n};\n\nconvert.lch.lab = function (lch) {\n var l = lch[0];\n var c = lch[1];\n var h = lch[2];\n var a;\n var b;\n var hr;\n hr = h / 360 * 2 * Math.PI;\n a = c * Math.cos(hr);\n b = c * Math.sin(hr);\n return [l, a, b];\n};\n\nconvert.rgb.ansi16 = function (args) {\n var r = args[0];\n var g = args[1];\n var b = args[2];\n var value = 1 in arguments ? arguments[1] : convert.rgb.hsv(args)[2]; // hsv -> ansi16 optimization\n\n value = Math.round(value / 50);\n\n if (value === 0) {\n return 30;\n }\n\n var ansi = 30 + (Math.round(b / 255) << 2 | Math.round(g / 255) << 1 | Math.round(r / 255));\n\n if (value === 2) {\n ansi += 60;\n }\n\n return ansi;\n};\n\nconvert.hsv.ansi16 = function (args) {\n // optimization here; we already know the value and don't need to get\n // it converted for us.\n return convert.rgb.ansi16(convert.hsv.rgb(args), args[2]);\n};\n\nconvert.rgb.ansi256 = function (args) {\n var r = args[0];\n var g = args[1];\n var b = args[2]; // we use the extended greyscale palette here, with the exception of\n // black and white. normal palette only has 4 greyscale shades.\n\n if (r === g && g === b) {\n if (r < 8) {\n return 16;\n }\n\n if (r > 248) {\n return 231;\n }\n\n return Math.round((r - 8) / 247 * 24) + 232;\n }\n\n var ansi = 16 + 36 * Math.round(r / 255 * 5) + 6 * Math.round(g / 255 * 5) + Math.round(b / 255 * 5);\n return ansi;\n};\n\nconvert.ansi16.rgb = function (args) {\n var color = args % 10; // handle greyscale\n\n if (color === 0 || color === 7) {\n if (args > 50) {\n color += 3.5;\n }\n\n color = color / 10.5 * 255;\n return [color, color, color];\n }\n\n var mult = (~~(args > 50) + 1) * 0.5;\n var r = (color & 1) * mult * 255;\n var g = (color >> 1 & 1) * mult * 255;\n var b = (color >> 2 & 1) * mult * 255;\n return [r, g, b];\n};\n\nconvert.ansi256.rgb = function (args) {\n // handle greyscale\n if (args >= 232) {\n var c = (args - 232) * 10 + 8;\n return [c, c, c];\n }\n\n args -= 16;\n var rem;\n var r = Math.floor(args / 36) / 5 * 255;\n var g = Math.floor((rem = args % 36) / 6) / 5 * 255;\n var b = rem % 6 / 5 * 255;\n return [r, g, b];\n};\n\nconvert.rgb.hex = function (args) {\n var integer = ((Math.round(args[0]) & 0xFF) << 16) + ((Math.round(args[1]) & 0xFF) << 8) + (Math.round(args[2]) & 0xFF);\n var string = integer.toString(16).toUpperCase();\n return '000000'.substring(string.length) + string;\n};\n\nconvert.hex.rgb = function (args) {\n var match = args.toString(16).match(/[a-f0-9]{6}|[a-f0-9]{3}/i);\n\n if (!match) {\n return [0, 0, 0];\n }\n\n var colorString = match[0];\n\n if (match[0].length === 3) {\n colorString = colorString.split('').map(function (char) {\n return char + char;\n }).join('');\n }\n\n var integer = parseInt(colorString, 16);\n var r = integer >> 16 & 0xFF;\n var g = integer >> 8 & 0xFF;\n var b = integer & 0xFF;\n return [r, g, b];\n};\n\nconvert.rgb.hcg = function (rgb) {\n var r = rgb[0] / 255;\n var g = rgb[1] / 255;\n var b = rgb[2] / 255;\n var max = Math.max(Math.max(r, g), b);\n var min = Math.min(Math.min(r, g), b);\n var chroma = max - min;\n var grayscale;\n var hue;\n\n if (chroma < 1) {\n grayscale = min / (1 - chroma);\n } else {\n grayscale = 0;\n }\n\n if (chroma <= 0) {\n hue = 0;\n } else if (max === r) {\n hue = (g - b) / chroma % 6;\n } else if (max === g) {\n hue = 2 + (b - r) / chroma;\n } else {\n hue = 4 + (r - g) / chroma + 4;\n }\n\n hue /= 6;\n hue %= 1;\n return [hue * 360, chroma * 100, grayscale * 100];\n};\n\nconvert.hsl.hcg = function (hsl) {\n var s = hsl[1] / 100;\n var l = hsl[2] / 100;\n var c = 1;\n var f = 0;\n\n if (l < 0.5) {\n c = 2.0 * s * l;\n } else {\n c = 2.0 * s * (1.0 - l);\n }\n\n if (c < 1.0) {\n f = (l - 0.5 * c) / (1.0 - c);\n }\n\n return [hsl[0], c * 100, f * 100];\n};\n\nconvert.hsv.hcg = function (hsv) {\n var s = hsv[1] / 100;\n var v = hsv[2] / 100;\n var c = s * v;\n var f = 0;\n\n if (c < 1.0) {\n f = (v - c) / (1 - c);\n }\n\n return [hsv[0], c * 100, f * 100];\n};\n\nconvert.hcg.rgb = function (hcg) {\n var h = hcg[0] / 360;\n var c = hcg[1] / 100;\n var g = hcg[2] / 100;\n\n if (c === 0.0) {\n return [g * 255, g * 255, g * 255];\n }\n\n var pure = [0, 0, 0];\n var hi = h % 1 * 6;\n var v = hi % 1;\n var w = 1 - v;\n var mg = 0;\n\n switch (Math.floor(hi)) {\n case 0:\n pure[0] = 1;\n pure[1] = v;\n pure[2] = 0;\n break;\n\n case 1:\n pure[0] = w;\n pure[1] = 1;\n pure[2] = 0;\n break;\n\n case 2:\n pure[0] = 0;\n pure[1] = 1;\n pure[2] = v;\n break;\n\n case 3:\n pure[0] = 0;\n pure[1] = w;\n pure[2] = 1;\n break;\n\n case 4:\n pure[0] = v;\n pure[1] = 0;\n pure[2] = 1;\n break;\n\n default:\n pure[0] = 1;\n pure[1] = 0;\n pure[2] = w;\n }\n\n mg = (1.0 - c) * g;\n return [(c * pure[0] + mg) * 255, (c * pure[1] + mg) * 255, (c * pure[2] + mg) * 255];\n};\n\nconvert.hcg.hsv = function (hcg) {\n var c = hcg[1] / 100;\n var g = hcg[2] / 100;\n var v = c + g * (1.0 - c);\n var f = 0;\n\n if (v > 0.0) {\n f = c / v;\n }\n\n return [hcg[0], f * 100, v * 100];\n};\n\nconvert.hcg.hsl = function (hcg) {\n var c = hcg[1] / 100;\n var g = hcg[2] / 100;\n var l = g * (1.0 - c) + 0.5 * c;\n var s = 0;\n\n if (l > 0.0 && l < 0.5) {\n s = c / (2 * l);\n } else if (l >= 0.5 && l < 1.0) {\n s = c / (2 * (1 - l));\n }\n\n return [hcg[0], s * 100, l * 100];\n};\n\nconvert.hcg.hwb = function (hcg) {\n var c = hcg[1] / 100;\n var g = hcg[2] / 100;\n var v = c + g * (1.0 - c);\n return [hcg[0], (v - c) * 100, (1 - v) * 100];\n};\n\nconvert.hwb.hcg = function (hwb) {\n var w = hwb[1] / 100;\n var b = hwb[2] / 100;\n var v = 1 - b;\n var c = v - w;\n var g = 0;\n\n if (c < 1) {\n g = (v - c) / (1 - c);\n }\n\n return [hwb[0], c * 100, g * 100];\n};\n\nconvert.apple.rgb = function (apple) {\n return [apple[0] / 65535 * 255, apple[1] / 65535 * 255, apple[2] / 65535 * 255];\n};\n\nconvert.rgb.apple = function (rgb) {\n return [rgb[0] / 255 * 65535, rgb[1] / 255 * 65535, rgb[2] / 255 * 65535];\n};\n\nconvert.gray.rgb = function (args) {\n return [args[0] / 100 * 255, args[0] / 100 * 255, args[0] / 100 * 255];\n};\n\nconvert.gray.hsl = convert.gray.hsv = function (args) {\n return [0, 0, args[0]];\n};\n\nconvert.gray.hwb = function (gray) {\n return [0, 100, gray[0]];\n};\n\nconvert.gray.cmyk = function (gray) {\n return [0, 0, 0, gray[0]];\n};\n\nconvert.gray.lab = function (gray) {\n return [gray[0], 0, 0];\n};\n\nconvert.gray.hex = function (gray) {\n var val = Math.round(gray[0] / 100 * 255) & 0xFF;\n var integer = (val << 16) + (val << 8) + val;\n var string = integer.toString(16).toUpperCase();\n return '000000'.substring(string.length) + string;\n};\n\nconvert.rgb.gray = function (rgb) {\n var val = (rgb[0] + rgb[1] + rgb[2]) / 3;\n return [val / 255 * 100];\n};","map":null,"metadata":{},"sourceType":"script"} |