1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 | 1× 4× 4× 4× 4× 4× 4× 4× 4× 4× 1× 1× 1× 4× 1× 1× 1× 4× 4× 2× 2× 2× 4× 4× 4× 4× 4× 4× 4× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 2× 2× 1× 1× 1× 1× 1× 1× 6× 6× 2× 2× 4× 1× 3× 2× 6× 6× 3× 1× 2× 2× 3× 3× 6× 1× 3× 3× 3× 1× 3× 3× 1× 1× | import { isPresent } from '@ember/utils'; import { clamp } from './math'; /* * Implements https://en.wikipedia.org/wiki/HSL_and_HSV#From_HSV * to convert a hue/saturation/brightness color to RGB. * * If an alpha value is present in the input, it will be passed through, * otherwise a default value of 1 will be included in the output. * * Examples: * hsbaToRgba({ hue: 70, saturation: 0.3, brightness: 0.8 }) * => { red: 194, green: 204, blue: 143, alpha: 1 } */ export function hsbaToRgba(color) { const { hue, saturation, brightness, alpha = 1 } = color; const chroma = brightness * saturation; const huePrime = hue / 60; const hueDelta = 1 - Math.abs(huePrime % 2 - 1); const intermediateValue = chroma * hueDelta; let red = 0; let green = 0; let blue = 0; if (huePrime >= 0 && huePrime <= 1) { red = chroma; green = intermediateValue; blue = 0; } if (huePrime >= 1 && huePrime <= 2) { red = intermediateValue; green = chroma; blue = 0; } Iif (huePrime >= 2 && huePrime <= 3) { red = 0; green = chroma; blue = intermediateValue; } if (huePrime >= 3 && huePrime <= 4) { red = 0; green = intermediateValue; blue = chroma; } Iif (huePrime >= 4 && huePrime <= 5) { red = intermediateValue; green = 0; blue = chroma; } Iif (huePrime >= 5 && huePrime <= 6) { red = chroma; green = 0; blue = intermediateValue; } const chromaBrightnessDelta = brightness - chroma; red += chromaBrightnessDelta; green += chromaBrightnessDelta; blue += chromaBrightnessDelta; return { red: Math.round(red * 255), green: Math.round(green * 255), blue: Math.round(blue * 255), alpha, }; } /* * Implements https://en.wikipedia.org/wiki/HSL_and_HSV * to convert an rgba color to hsba. * * If an alpha value is present in the input, it will be passed through, * otherwise a default value of 1 will be included in the output. * * Examples: * rgbaToHsb({ red: 194, green: 204, blue: 143, alpha: 1 }) * => { hue: 70, saturation: 0.3, brightness: 0.8 } */ export function rgbaToHsb(color) { const { red, green, blue, alpha = 1 } = color; const r = red / 255; const g = green / 255; const b = blue / 255; const largestComponent = Math.max(r, g, b); const smallestComponent = Math.min(r, g, b); const delta = largestComponent - smallestComponent; const saturation = largestComponent === 0 ? 0 : delta / largestComponent; let huePercentage = 0; switch (largestComponent) { case r: huePercentage = (g - b) / delta + (g < b ? 6 : 0); break; case g: huePercentage = (b - r) / delta + 2; break; case b: huePercentage = (r - g) / delta + 4; break; } const hue = Math.round(huePercentage / 6 * 360); return { hue: clamp(hue, 0, 360) || 0, saturation: clamp(saturation, 0, 1), brightness: clamp(largestComponent, 0, 1), alpha, }; } /* * Converts an RGB(a) color represented as an object into a valid CSS `rgb` / `rgba` * color. * * Examples: * rgbaString({ red: 194, green: 204, blue: 143, alpha: 1 }) * => rga() * */ export function rgbaString(color) { const { red, green, blue, alpha } = color; if (isPresent(alpha)) { return `rgba(${ red }, ${ green }, ${ blue }, ${ alpha })`; } return `rgb(${ red }, ${ green }, ${ blue })`; } export function rgbToHex({red, green, blue}) { return `#${ componentToHex(red) }${ componentToHex(green) }${ componentToHex(blue) }`; } function componentToHex(component) { const hex = component.toString(16); return hex.length === 1 ? `0${ hex }` : hex; } export function hsbToHex(color) { return rgbToHex(hsbaToRgba(color)); } /* * Converts an object representation of an RGB(a) color to HEX. * * NOTE: This is shamelessly copied from https://github.com/sindresorhus/rgb-hex * * Examples: * * rgbHex({ 65, 131, 196 }); * => '4183c4' * * rgbHex(65, 131, 196); * => '4183c4' * * rgbHex('rgb(40, 42, 54)'); * => '282a36' * * rgbHex(65, 131, 196, 0.2); * => '4183c433' * * rgbHex(40, 42, 54, '75%'); * => '282a36bf' * * rgbHex('rgba(40, 42, 54, 75%)'); * => '282a36bf' */ export function rgbaToHex(red, green, blue, alpha) { const isPercent = `${ red }${ alpha || '' }`.toString().includes('%'); if (typeof red === 'string') { const res = red.match(/(0?\.?\d{1,3})%?\b/g).map(Number); [ red, green, blue, alpha ] = res; } else if (typeof red === 'object') { ({ red, green, blue, alpha } = red); } else if (isPresent(alpha)) { alpha = parseFloat(alpha); } Iif (typeof red !== 'number' || typeof green !== 'number' || typeof blue !== 'number' || red > 255 || green > 255 || blue > 255) { throw new TypeError('Expected three numbers below 256'); } if (typeof alpha === 'number') { if (!isPercent && alpha >= 0 && alpha <= 1) { alpha = Math.round(255 * alpha); } else Eif (isPercent && alpha >= 0 && alpha <= 100) { alpha = Math.round(255 * alpha / 100); } else { throw new TypeError(`Expected alpha value (${alpha}) as a fraction or percentage`); } alpha = (alpha | 1 << 8).toString(16).slice(1); } else { alpha = ''; } return ((blue | green << 8 | red << 16) | 1 << 24).toString(16).slice(1) + alpha; } export function hexToRgb(hex) { Iif (typeof hex !== 'string') { throw new TypeError('Expected a string'); } hex = hex.replace(/^#/, ''); if (hex.length === 3) { hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2]; } const num = parseInt(hex, 16); return { red: num >> 16, green: num >> 8 & 255, blue: num & 255, }; } export function hexToHsb(hex) { return rgbaToHsb(hexToRgb(hex)); } export function hsbaToHex(color) { return rgbaToHex(hsbaToRgba(color)); } |