diff options
Diffstat (limited to 'node_modules/color-convert/conversions.js')
| -rw-r--r-- | node_modules/color-convert/conversions.js | 632 |
1 files changed, 305 insertions, 327 deletions
diff --git a/node_modules/color-convert/conversions.js b/node_modules/color-convert/conversions.js index 19ca4a9bf..2657f265c 100644 --- a/node_modules/color-convert/conversions.js +++ b/node_modules/color-convert/conversions.js @@ -1,18 +1,17 @@ /* MIT license */ -var cssKeywords = require('color-name'); +/* eslint-disable no-mixed-operators */ +const cssKeywords = require('color-name'); // NOTE: conversions should only return primitive values (i.e. arrays, or // values that give correct `typeof` results). // do not use box values types (i.e. Number(), String(), etc.) -var reverseKeywords = {}; -for (var key in cssKeywords) { - if (cssKeywords.hasOwnProperty(key)) { - reverseKeywords[cssKeywords[key]] = key; - } +const reverseKeywords = {}; +for (const key of Object.keys(cssKeywords)) { + reverseKeywords[cssKeywords[key]] = key; } -var convert = module.exports = { +const convert = { rgb: {channels: 3, labels: 'rgb'}, hsl: {channels: 3, labels: 'hsl'}, hsv: {channels: 3, labels: 'hsv'}, @@ -30,40 +29,38 @@ var convert = module.exports = { gray: {channels: 1, labels: ['gray']} }; -// hide .channels and .labels properties -for (var model in convert) { - if (convert.hasOwnProperty(model)) { - if (!('channels' in convert[model])) { - throw new Error('missing channels property: ' + model); - } +module.exports = convert; - if (!('labels' in convert[model])) { - throw new Error('missing channel labels property: ' + model); - } +// Hide .channels and .labels properties +for (const model of Object.keys(convert)) { + if (!('channels' in convert[model])) { + throw new Error('missing channels property: ' + model); + } - if (convert[model].labels.length !== convert[model].channels) { - throw new Error('channel and label counts mismatch: ' + model); - } + if (!('labels' in convert[model])) { + throw new Error('missing channel labels property: ' + model); + } - var channels = convert[model].channels; - var labels = convert[model].labels; - delete convert[model].channels; - delete convert[model].labels; - Object.defineProperty(convert[model], 'channels', {value: channels}); - Object.defineProperty(convert[model], 'labels', {value: labels}); + if (convert[model].labels.length !== convert[model].channels) { + throw new Error('channel and label counts mismatch: ' + model); } + + const {channels, labels} = convert[model]; + delete convert[model].channels; + delete convert[model].labels; + Object.defineProperty(convert[model], 'channels', {value: channels}); + Object.defineProperty(convert[model], 'labels', {value: labels}); } convert.rgb.hsl = function (rgb) { - var r = rgb[0] / 255; - var g = rgb[1] / 255; - var b = rgb[2] / 255; - var min = Math.min(r, g, b); - var max = Math.max(r, g, b); - var delta = max - min; - var h; - var s; - var l; + const r = rgb[0] / 255; + const g = rgb[1] / 255; + const b = rgb[2] / 255; + const min = Math.min(r, g, b); + const max = Math.max(r, g, b); + const delta = max - min; + let h; + let s; if (max === min) { h = 0; @@ -81,7 +78,7 @@ convert.rgb.hsl = function (rgb) { h += 360; } - l = (min + max) / 2; + const l = (min + max) / 2; if (max === min) { s = 0; @@ -95,49 +92,58 @@ convert.rgb.hsl = function (rgb) { }; convert.rgb.hsv = function (rgb) { - var r = rgb[0]; - var g = rgb[1]; - var b = rgb[2]; - var min = Math.min(r, g, b); - var max = Math.max(r, g, b); - var delta = max - min; - var h; - var s; - var v; - - if (max === 0) { + let rdif; + let gdif; + let bdif; + let h; + let s; + + const r = rgb[0] / 255; + const g = rgb[1] / 255; + const b = rgb[2] / 255; + const v = Math.max(r, g, b); + const diff = v - Math.min(r, g, b); + const diffc = function (c) { + return (v - c) / 6 / diff + 1 / 2; + }; + + if (diff === 0) { + h = 0; s = 0; } else { - s = (delta / max * 1000) / 10; - } - - if (max === min) { - h = 0; - } else if (r === max) { - h = (g - b) / delta; - } else if (g === max) { - h = 2 + (b - r) / delta; - } else if (b === max) { - h = 4 + (r - g) / delta; - } - - h = Math.min(h * 60, 360); + s = diff / v; + rdif = diffc(r); + gdif = diffc(g); + bdif = diffc(b); + + if (r === v) { + h = bdif - gdif; + } else if (g === v) { + h = (1 / 3) + rdif - bdif; + } else if (b === v) { + h = (2 / 3) + gdif - rdif; + } - if (h < 0) { - h += 360; + if (h < 0) { + h += 1; + } else if (h > 1) { + h -= 1; + } } - v = ((max / 255) * 1000) / 10; - - return [h, s, v]; + return [ + h * 360, + s * 100, + v * 100 + ]; }; convert.rgb.hwb = function (rgb) { - var r = rgb[0]; - var g = rgb[1]; - var b = rgb[2]; - var h = convert.rgb.hsl(rgb)[0]; - var w = 1 / 255 * Math.min(r, Math.min(g, b)); + const r = rgb[0]; + const g = rgb[1]; + let b = rgb[2]; + const h = convert.rgb.hsl(rgb)[0]; + const w = 1 / 255 * Math.min(r, Math.min(g, b)); b = 1 - 1 / 255 * Math.max(r, Math.max(g, b)); @@ -145,54 +151,48 @@ convert.rgb.hwb = function (rgb) { }; convert.rgb.cmyk = function (rgb) { - var r = rgb[0] / 255; - var g = rgb[1] / 255; - var b = rgb[2] / 255; - var c; - var m; - var y; - var k; - - k = Math.min(1 - r, 1 - g, 1 - b); - c = (1 - r - k) / (1 - k) || 0; - m = (1 - g - k) / (1 - k) || 0; - y = (1 - b - k) / (1 - k) || 0; + const r = rgb[0] / 255; + const g = rgb[1] / 255; + const b = rgb[2] / 255; + + const k = Math.min(1 - r, 1 - g, 1 - b); + const c = (1 - r - k) / (1 - k) || 0; + const m = (1 - g - k) / (1 - k) || 0; + const y = (1 - b - k) / (1 - k) || 0; return [c * 100, m * 100, y * 100, k * 100]; }; -/** - * See https://en.m.wikipedia.org/wiki/Euclidean_distance#Squared_Euclidean_distance - * */ function comparativeDistance(x, y) { + /* + See https://en.m.wikipedia.org/wiki/Euclidean_distance#Squared_Euclidean_distance + */ return ( - Math.pow(x[0] - y[0], 2) + - Math.pow(x[1] - y[1], 2) + - Math.pow(x[2] - y[2], 2) + ((x[0] - y[0]) ** 2) + + ((x[1] - y[1]) ** 2) + + ((x[2] - y[2]) ** 2) ); } convert.rgb.keyword = function (rgb) { - var reversed = reverseKeywords[rgb]; + const reversed = reverseKeywords[rgb]; if (reversed) { return reversed; } - var currentClosestDistance = Infinity; - var currentClosestKeyword; + let currentClosestDistance = Infinity; + let currentClosestKeyword; - for (var keyword in cssKeywords) { - if (cssKeywords.hasOwnProperty(keyword)) { - var value = cssKeywords[keyword]; + for (const keyword of Object.keys(cssKeywords)) { + const value = cssKeywords[keyword]; - // Compute comparative distance - var distance = comparativeDistance(rgb, value); + // Compute comparative distance + const distance = comparativeDistance(rgb, value); - // Check if its less, if so set as closest - if (distance < currentClosestDistance) { - currentClosestDistance = distance; - currentClosestKeyword = keyword; - } + // Check if its less, if so set as closest + if (distance < currentClosestDistance) { + currentClosestDistance = distance; + currentClosestKeyword = keyword; } } @@ -204,55 +204,50 @@ convert.keyword.rgb = function (keyword) { }; convert.rgb.xyz = function (rgb) { - var r = rgb[0] / 255; - var g = rgb[1] / 255; - var b = rgb[2] / 255; + let r = rgb[0] / 255; + let g = rgb[1] / 255; + let b = rgb[2] / 255; - // assume sRGB - r = r > 0.04045 ? Math.pow(((r + 0.055) / 1.055), 2.4) : (r / 12.92); - g = g > 0.04045 ? Math.pow(((g + 0.055) / 1.055), 2.4) : (g / 12.92); - b = b > 0.04045 ? Math.pow(((b + 0.055) / 1.055), 2.4) : (b / 12.92); + // Assume sRGB + r = r > 0.04045 ? (((r + 0.055) / 1.055) ** 2.4) : (r / 12.92); + g = g > 0.04045 ? (((g + 0.055) / 1.055) ** 2.4) : (g / 12.92); + b = b > 0.04045 ? (((b + 0.055) / 1.055) ** 2.4) : (b / 12.92); - var x = (r * 0.4124) + (g * 0.3576) + (b * 0.1805); - var y = (r * 0.2126) + (g * 0.7152) + (b * 0.0722); - var z = (r * 0.0193) + (g * 0.1192) + (b * 0.9505); + const x = (r * 0.4124) + (g * 0.3576) + (b * 0.1805); + const y = (r * 0.2126) + (g * 0.7152) + (b * 0.0722); + const z = (r * 0.0193) + (g * 0.1192) + (b * 0.9505); return [x * 100, y * 100, z * 100]; }; convert.rgb.lab = function (rgb) { - var xyz = convert.rgb.xyz(rgb); - var x = xyz[0]; - var y = xyz[1]; - var z = xyz[2]; - var l; - var a; - var b; + const xyz = convert.rgb.xyz(rgb); + let x = xyz[0]; + let y = xyz[1]; + let z = xyz[2]; x /= 95.047; y /= 100; z /= 108.883; - x = x > 0.008856 ? Math.pow(x, 1 / 3) : (7.787 * x) + (16 / 116); - y = y > 0.008856 ? Math.pow(y, 1 / 3) : (7.787 * y) + (16 / 116); - z = z > 0.008856 ? Math.pow(z, 1 / 3) : (7.787 * z) + (16 / 116); + x = x > 0.008856 ? (x ** (1 / 3)) : (7.787 * x) + (16 / 116); + y = y > 0.008856 ? (y ** (1 / 3)) : (7.787 * y) + (16 / 116); + z = z > 0.008856 ? (z ** (1 / 3)) : (7.787 * z) + (16 / 116); - l = (116 * y) - 16; - a = 500 * (x - y); - b = 200 * (y - z); + const l = (116 * y) - 16; + const a = 500 * (x - y); + const b = 200 * (y - z); return [l, a, b]; }; convert.hsl.rgb = function (hsl) { - var h = hsl[0] / 360; - var s = hsl[1] / 100; - var l = hsl[2] / 100; - var t1; - var t2; - var t3; - var rgb; - var val; + const h = hsl[0] / 360; + const s = hsl[1] / 100; + const l = hsl[2] / 100; + let t2; + let t3; + let val; if (s === 0) { val = l * 255; @@ -265,14 +260,15 @@ convert.hsl.rgb = function (hsl) { t2 = l + s - l * s; } - t1 = 2 * l - t2; + const t1 = 2 * l - t2; - rgb = [0, 0, 0]; - for (var i = 0; i < 3; i++) { + const rgb = [0, 0, 0]; + for (let i = 0; i < 3; i++) { t3 = h + 1 / 3 * -(i - 1); if (t3 < 0) { t3++; } + if (t3 > 1) { t3--; } @@ -294,33 +290,31 @@ convert.hsl.rgb = function (hsl) { }; convert.hsl.hsv = function (hsl) { - var h = hsl[0]; - var s = hsl[1] / 100; - var l = hsl[2] / 100; - var smin = s; - var lmin = Math.max(l, 0.01); - var sv; - var v; + const h = hsl[0]; + let s = hsl[1] / 100; + let l = hsl[2] / 100; + let smin = s; + const lmin = Math.max(l, 0.01); l *= 2; s *= (l <= 1) ? l : 2 - l; smin *= lmin <= 1 ? lmin : 2 - lmin; - v = (l + s) / 2; - sv = l === 0 ? (2 * smin) / (lmin + smin) : (2 * s) / (l + s); + const v = (l + s) / 2; + const sv = l === 0 ? (2 * smin) / (lmin + smin) : (2 * s) / (l + s); return [h, sv * 100, v * 100]; }; convert.hsv.rgb = function (hsv) { - var h = hsv[0] / 60; - var s = hsv[1] / 100; - var v = hsv[2] / 100; - var hi = Math.floor(h) % 6; - - var f = h - Math.floor(h); - var p = 255 * v * (1 - s); - var q = 255 * v * (1 - (s * f)); - var t = 255 * v * (1 - (s * (1 - f))); + const h = hsv[0] / 60; + const s = hsv[1] / 100; + let v = hsv[2] / 100; + const hi = Math.floor(h) % 6; + + const f = h - Math.floor(h); + const p = 255 * v * (1 - s); + const q = 255 * v * (1 - (s * f)); + const t = 255 * v * (1 - (s * (1 - f))); v *= 255; switch (hi) { @@ -340,16 +334,15 @@ convert.hsv.rgb = function (hsv) { }; convert.hsv.hsl = function (hsv) { - var h = hsv[0]; - var s = hsv[1] / 100; - var v = hsv[2] / 100; - var vmin = Math.max(v, 0.01); - var lmin; - var sl; - var l; + const h = hsv[0]; + const s = hsv[1] / 100; + const v = hsv[2] / 100; + const vmin = Math.max(v, 0.01); + let sl; + let l; l = (2 - s) * v; - lmin = (2 - s) * vmin; + const lmin = (2 - s) * vmin; sl = s * vmin; sl /= (lmin <= 1) ? lmin : 2 - lmin; sl = sl || 0; @@ -360,87 +353,83 @@ convert.hsv.hsl = function (hsv) { // http://dev.w3.org/csswg/css-color/#hwb-to-rgb convert.hwb.rgb = function (hwb) { - var h = hwb[0] / 360; - var wh = hwb[1] / 100; - var bl = hwb[2] / 100; - var ratio = wh + bl; - var i; - var v; - var f; - var n; - - // wh + bl cant be > 1 + const h = hwb[0] / 360; + let wh = hwb[1] / 100; + let bl = hwb[2] / 100; + const ratio = wh + bl; + let f; + + // Wh + bl cant be > 1 if (ratio > 1) { wh /= ratio; bl /= ratio; } - i = Math.floor(6 * h); - v = 1 - bl; + const i = Math.floor(6 * h); + const v = 1 - bl; f = 6 * h - i; if ((i & 0x01) !== 0) { f = 1 - f; } - n = wh + f * (v - wh); // linear interpolation + const n = wh + f * (v - wh); // Linear interpolation - var r; - var g; - var b; + let r; + let g; + let b; + /* eslint-disable max-statements-per-line,no-multi-spaces */ switch (i) { default: case 6: - case 0: r = v; g = n; b = wh; break; - case 1: r = n; g = v; b = wh; break; - case 2: r = wh; g = v; b = n; break; - case 3: r = wh; g = n; b = v; break; - case 4: r = n; g = wh; b = v; break; - case 5: r = v; g = wh; b = n; break; + case 0: r = v; g = n; b = wh; break; + case 1: r = n; g = v; b = wh; break; + case 2: r = wh; g = v; b = n; break; + case 3: r = wh; g = n; b = v; break; + case 4: r = n; g = wh; b = v; break; + case 5: r = v; g = wh; b = n; break; } + /* eslint-enable max-statements-per-line,no-multi-spaces */ return [r * 255, g * 255, b * 255]; }; convert.cmyk.rgb = function (cmyk) { - var c = cmyk[0] / 100; - var m = cmyk[1] / 100; - var y = cmyk[2] / 100; - var k = cmyk[3] / 100; - var r; - var g; - var b; - - r = 1 - Math.min(1, c * (1 - k) + k); - g = 1 - Math.min(1, m * (1 - k) + k); - b = 1 - Math.min(1, y * (1 - k) + k); + const c = cmyk[0] / 100; + const m = cmyk[1] / 100; + const y = cmyk[2] / 100; + const k = cmyk[3] / 100; + + const r = 1 - Math.min(1, c * (1 - k) + k); + const g = 1 - Math.min(1, m * (1 - k) + k); + const b = 1 - Math.min(1, y * (1 - k) + k); return [r * 255, g * 255, b * 255]; }; convert.xyz.rgb = function (xyz) { - var x = xyz[0] / 100; - var y = xyz[1] / 100; - var z = xyz[2] / 100; - var r; - var g; - var b; + const x = xyz[0] / 100; + const y = xyz[1] / 100; + const z = xyz[2] / 100; + let r; + let g; + let b; r = (x * 3.2406) + (y * -1.5372) + (z * -0.4986); g = (x * -0.9689) + (y * 1.8758) + (z * 0.0415); b = (x * 0.0557) + (y * -0.2040) + (z * 1.0570); - // assume sRGB + // Assume sRGB r = r > 0.0031308 - ? ((1.055 * Math.pow(r, 1.0 / 2.4)) - 0.055) + ? ((1.055 * (r ** (1.0 / 2.4))) - 0.055) : r * 12.92; g = g > 0.0031308 - ? ((1.055 * Math.pow(g, 1.0 / 2.4)) - 0.055) + ? ((1.055 * (g ** (1.0 / 2.4))) - 0.055) : g * 12.92; b = b > 0.0031308 - ? ((1.055 * Math.pow(b, 1.0 / 2.4)) - 0.055) + ? ((1.055 * (b ** (1.0 / 2.4))) - 0.055) : b * 12.92; r = Math.min(Math.max(0, r), 1); @@ -451,43 +440,40 @@ convert.xyz.rgb = function (xyz) { }; convert.xyz.lab = function (xyz) { - var x = xyz[0]; - var y = xyz[1]; - var z = xyz[2]; - var l; - var a; - var b; + let x = xyz[0]; + let y = xyz[1]; + let z = xyz[2]; x /= 95.047; y /= 100; z /= 108.883; - x = x > 0.008856 ? Math.pow(x, 1 / 3) : (7.787 * x) + (16 / 116); - y = y > 0.008856 ? Math.pow(y, 1 / 3) : (7.787 * y) + (16 / 116); - z = z > 0.008856 ? Math.pow(z, 1 / 3) : (7.787 * z) + (16 / 116); + x = x > 0.008856 ? (x ** (1 / 3)) : (7.787 * x) + (16 / 116); + y = y > 0.008856 ? (y ** (1 / 3)) : (7.787 * y) + (16 / 116); + z = z > 0.008856 ? (z ** (1 / 3)) : (7.787 * z) + (16 / 116); - l = (116 * y) - 16; - a = 500 * (x - y); - b = 200 * (y - z); + const l = (116 * y) - 16; + const a = 500 * (x - y); + const b = 200 * (y - z); return [l, a, b]; }; convert.lab.xyz = function (lab) { - var l = lab[0]; - var a = lab[1]; - var b = lab[2]; - var x; - var y; - var z; + const l = lab[0]; + const a = lab[1]; + const b = lab[2]; + let x; + let y; + let z; y = (l + 16) / 116; x = a / 500 + y; z = y - b / 200; - var y2 = Math.pow(y, 3); - var x2 = Math.pow(x, 3); - var z2 = Math.pow(z, 3); + const y2 = y ** 3; + const x2 = x ** 3; + const z2 = z ** 3; y = y2 > 0.008856 ? y2 : (y - 16 / 116) / 7.787; x = x2 > 0.008856 ? x2 : (x - 16 / 116) / 7.787; z = z2 > 0.008856 ? z2 : (z - 16 / 116) / 7.787; @@ -500,45 +486,38 @@ convert.lab.xyz = function (lab) { }; convert.lab.lch = function (lab) { - var l = lab[0]; - var a = lab[1]; - var b = lab[2]; - var hr; - var h; - var c; - - hr = Math.atan2(b, a); + const l = lab[0]; + const a = lab[1]; + const b = lab[2]; + let h; + + const hr = Math.atan2(b, a); h = hr * 360 / 2 / Math.PI; if (h < 0) { h += 360; } - c = Math.sqrt(a * a + b * b); + const c = Math.sqrt(a * a + b * b); return [l, c, h]; }; convert.lch.lab = function (lch) { - var l = lch[0]; - var c = lch[1]; - var h = lch[2]; - var a; - var b; - var hr; + const l = lch[0]; + const c = lch[1]; + const h = lch[2]; - hr = h / 360 * 2 * Math.PI; - a = c * Math.cos(hr); - b = c * Math.sin(hr); + const hr = h / 360 * 2 * Math.PI; + const a = c * Math.cos(hr); + const b = c * Math.sin(hr); return [l, a, b]; }; -convert.rgb.ansi16 = function (args) { - var r = args[0]; - var g = args[1]; - var b = args[2]; - var value = 1 in arguments ? arguments[1] : convert.rgb.hsv(args)[2]; // hsv -> ansi16 optimization +convert.rgb.ansi16 = function (args, saturation = null) { + const [r, g, b] = args; + let value = saturation === null ? convert.rgb.hsv(args)[2] : saturation; // Hsv -> ansi16 optimization value = Math.round(value / 50); @@ -546,7 +525,7 @@ convert.rgb.ansi16 = function (args) { return 30; } - var ansi = 30 + let ansi = 30 + ((Math.round(b / 255) << 2) | (Math.round(g / 255) << 1) | Math.round(r / 255)); @@ -559,17 +538,17 @@ convert.rgb.ansi16 = function (args) { }; convert.hsv.ansi16 = function (args) { - // optimization here; we already know the value and don't need to get + // Optimization here; we already know the value and don't need to get // it converted for us. return convert.rgb.ansi16(convert.hsv.rgb(args), args[2]); }; convert.rgb.ansi256 = function (args) { - var r = args[0]; - var g = args[1]; - var b = args[2]; + const r = args[0]; + const g = args[1]; + const b = args[2]; - // we use the extended greyscale palette here, with the exception of + // We use the extended greyscale palette here, with the exception of // black and white. normal palette only has 4 greyscale shades. if (r === g && g === b) { if (r < 8) { @@ -583,7 +562,7 @@ convert.rgb.ansi256 = function (args) { return Math.round(((r - 8) / 247) * 24) + 232; } - var ansi = 16 + const ansi = 16 + (36 * Math.round(r / 255 * 5)) + (6 * Math.round(g / 255 * 5)) + Math.round(b / 255 * 5); @@ -592,9 +571,9 @@ convert.rgb.ansi256 = function (args) { }; convert.ansi16.rgb = function (args) { - var color = args % 10; + let color = args % 10; - // handle greyscale + // Handle greyscale if (color === 0 || color === 7) { if (args > 50) { color += 3.5; @@ -605,71 +584,71 @@ convert.ansi16.rgb = function (args) { return [color, color, color]; } - var mult = (~~(args > 50) + 1) * 0.5; - var r = ((color & 1) * mult) * 255; - var g = (((color >> 1) & 1) * mult) * 255; - var b = (((color >> 2) & 1) * mult) * 255; + const mult = (~~(args > 50) + 1) * 0.5; + const r = ((color & 1) * mult) * 255; + const g = (((color >> 1) & 1) * mult) * 255; + const b = (((color >> 2) & 1) * mult) * 255; return [r, g, b]; }; convert.ansi256.rgb = function (args) { - // handle greyscale + // Handle greyscale if (args >= 232) { - var c = (args - 232) * 10 + 8; + const c = (args - 232) * 10 + 8; return [c, c, c]; } args -= 16; - var rem; - var r = Math.floor(args / 36) / 5 * 255; - var g = Math.floor((rem = args % 36) / 6) / 5 * 255; - var b = (rem % 6) / 5 * 255; + let rem; + const r = Math.floor(args / 36) / 5 * 255; + const g = Math.floor((rem = args % 36) / 6) / 5 * 255; + const b = (rem % 6) / 5 * 255; return [r, g, b]; }; convert.rgb.hex = function (args) { - var integer = ((Math.round(args[0]) & 0xFF) << 16) + const integer = ((Math.round(args[0]) & 0xFF) << 16) + ((Math.round(args[1]) & 0xFF) << 8) + (Math.round(args[2]) & 0xFF); - var string = integer.toString(16).toUpperCase(); + const string = integer.toString(16).toUpperCase(); return '000000'.substring(string.length) + string; }; convert.hex.rgb = function (args) { - var match = args.toString(16).match(/[a-f0-9]{6}|[a-f0-9]{3}/i); + const match = args.toString(16).match(/[a-f0-9]{6}|[a-f0-9]{3}/i); if (!match) { return [0, 0, 0]; } - var colorString = match[0]; + let colorString = match[0]; if (match[0].length === 3) { - colorString = colorString.split('').map(function (char) { + colorString = colorString.split('').map(char => { return char + char; }).join(''); } - var integer = parseInt(colorString, 16); - var r = (integer >> 16) & 0xFF; - var g = (integer >> 8) & 0xFF; - var b = integer & 0xFF; + const integer = parseInt(colorString, 16); + const r = (integer >> 16) & 0xFF; + const g = (integer >> 8) & 0xFF; + const b = integer & 0xFF; return [r, g, b]; }; convert.rgb.hcg = function (rgb) { - var r = rgb[0] / 255; - var g = rgb[1] / 255; - var b = rgb[2] / 255; - var max = Math.max(Math.max(r, g), b); - var min = Math.min(Math.min(r, g), b); - var chroma = (max - min); - var grayscale; - var hue; + const r = rgb[0] / 255; + const g = rgb[1] / 255; + const b = rgb[2] / 255; + const max = Math.max(Math.max(r, g), b); + const min = Math.min(Math.min(r, g), b); + const chroma = (max - min); + let grayscale; + let hue; if (chroma < 1) { grayscale = min / (1 - chroma); @@ -686,7 +665,7 @@ convert.rgb.hcg = function (rgb) { if (max === g) { hue = 2 + (b - r) / chroma; } else { - hue = 4 + (r - g) / chroma + 4; + hue = 4 + (r - g) / chroma; } hue /= 6; @@ -696,17 +675,12 @@ convert.rgb.hcg = function (rgb) { }; convert.hsl.hcg = function (hsl) { - var s = hsl[1] / 100; - var l = hsl[2] / 100; - var c = 1; - var f = 0; + const s = hsl[1] / 100; + const l = hsl[2] / 100; - if (l < 0.5) { - c = 2.0 * s * l; - } else { - c = 2.0 * s * (1.0 - l); - } + const c = l < 0.5 ? (2.0 * s * l) : (2.0 * s * (1.0 - l)); + let f = 0; if (c < 1.0) { f = (l - 0.5 * c) / (1.0 - c); } @@ -715,11 +689,11 @@ convert.hsl.hcg = function (hsl) { }; convert.hsv.hcg = function (hsv) { - var s = hsv[1] / 100; - var v = hsv[2] / 100; + const s = hsv[1] / 100; + const v = hsv[2] / 100; - var c = s * v; - var f = 0; + const c = s * v; + let f = 0; if (c < 1.0) { f = (v - c) / (1 - c); @@ -729,20 +703,21 @@ convert.hsv.hcg = function (hsv) { }; convert.hcg.rgb = function (hcg) { - var h = hcg[0] / 360; - var c = hcg[1] / 100; - var g = hcg[2] / 100; + const h = hcg[0] / 360; + const c = hcg[1] / 100; + const g = hcg[2] / 100; if (c === 0.0) { return [g * 255, g * 255, g * 255]; } - var pure = [0, 0, 0]; - var hi = (h % 1) * 6; - var v = hi % 1; - var w = 1 - v; - var mg = 0; + const pure = [0, 0, 0]; + const hi = (h % 1) * 6; + const v = hi % 1; + const w = 1 - v; + let mg = 0; + /* eslint-disable max-statements-per-line */ switch (Math.floor(hi)) { case 0: pure[0] = 1; pure[1] = v; pure[2] = 0; break; @@ -757,6 +732,7 @@ convert.hcg.rgb = function (hcg) { default: pure[0] = 1; pure[1] = 0; pure[2] = w; } + /* eslint-enable max-statements-per-line */ mg = (1.0 - c) * g; @@ -768,11 +744,11 @@ convert.hcg.rgb = function (hcg) { }; convert.hcg.hsv = function (hcg) { - var c = hcg[1] / 100; - var g = hcg[2] / 100; + const c = hcg[1] / 100; + const g = hcg[2] / 100; - var v = c + g * (1.0 - c); - var f = 0; + const v = c + g * (1.0 - c); + let f = 0; if (v > 0.0) { f = c / v; @@ -782,11 +758,11 @@ convert.hcg.hsv = function (hcg) { }; convert.hcg.hsl = function (hcg) { - var c = hcg[1] / 100; - var g = hcg[2] / 100; + const c = hcg[1] / 100; + const g = hcg[2] / 100; - var l = g * (1.0 - c) + 0.5 * c; - var s = 0; + const l = g * (1.0 - c) + 0.5 * c; + let s = 0; if (l > 0.0 && l < 0.5) { s = c / (2 * l); @@ -799,18 +775,18 @@ convert.hcg.hsl = function (hcg) { }; convert.hcg.hwb = function (hcg) { - var c = hcg[1] / 100; - var g = hcg[2] / 100; - var v = c + g * (1.0 - c); + const c = hcg[1] / 100; + const g = hcg[2] / 100; + const v = c + g * (1.0 - c); return [hcg[0], (v - c) * 100, (1 - v) * 100]; }; convert.hwb.hcg = function (hwb) { - var w = hwb[1] / 100; - var b = hwb[2] / 100; - var v = 1 - b; - var c = v - w; - var g = 0; + const w = hwb[1] / 100; + const b = hwb[2] / 100; + const v = 1 - b; + const c = v - w; + let g = 0; if (c < 1) { g = (v - c) / (1 - c); @@ -831,10 +807,12 @@ convert.gray.rgb = function (args) { return [args[0] / 100 * 255, args[0] / 100 * 255, args[0] / 100 * 255]; }; -convert.gray.hsl = convert.gray.hsv = function (args) { +convert.gray.hsl = function (args) { return [0, 0, args[0]]; }; +convert.gray.hsv = convert.gray.hsl; + convert.gray.hwb = function (gray) { return [0, 100, gray[0]]; }; @@ -848,14 +826,14 @@ convert.gray.lab = function (gray) { }; convert.gray.hex = function (gray) { - var val = Math.round(gray[0] / 100 * 255) & 0xFF; - var integer = (val << 16) + (val << 8) + val; + const val = Math.round(gray[0] / 100 * 255) & 0xFF; + const integer = (val << 16) + (val << 8) + val; - var string = integer.toString(16).toUpperCase(); + const string = integer.toString(16).toUpperCase(); return '000000'.substring(string.length) + string; }; convert.rgb.gray = function (rgb) { - var val = (rgb[0] + rgb[1] + rgb[2]) / 3; + const val = (rgb[0] + rgb[1] + rgb[2]) / 3; return [val / 255 * 100]; }; |