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<?php |
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/** |
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* ImageOptimize plugin for Craft CMS |
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* |
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* Automatically optimize images after they've been transformed |
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* |
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* @link https://nystudio107.com |
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* @copyright Copyright (c) 2017 nystudio107 |
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*/ |
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namespace nystudio107\imageoptimize\helpers; |
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/** |
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* @author nystudio107 |
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* @package ImageOptimize |
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* @since 1.5.7 |
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*/ |
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class Color |
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{ |
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// Public Static Properties |
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// ========================================================================= |
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// Public Static Methods |
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// ========================================================================= |
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/** |
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* Convert a HTML color (e.g. #FFFFFF or #FFF) to an array of RGB colors |
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* |
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* @param string $htmlCode |
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* |
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* @return array |
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*/ |
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public static function HTMLToRGB(string $htmlCode): array |
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{ |
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if (strpos($htmlCode, '#') === 0) { |
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$htmlCode = substr($htmlCode, 1); |
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} |
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if (strlen($htmlCode) === 3) { |
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$htmlCode = $htmlCode[0] . $htmlCode[0] . $htmlCode[1] . $htmlCode[1] . $htmlCode[2] . $htmlCode[2]; |
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} |
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$r = hexdec($htmlCode[0] . $htmlCode[1]); |
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$g = hexdec($htmlCode[2] . $htmlCode[3]); |
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$b = hexdec($htmlCode[4] . $htmlCode[5]); |
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return ['r' => $r, 'g' => $g, 'b' => $b]; |
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} |
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/** |
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* Convert an RGB color array to a HSL color array |
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* |
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* @param array $rgb |
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* |
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* @return array |
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*/ |
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public static function RGBToHSL(array $rgb): array |
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{ |
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$r = ((float)$rgb['r']) / 255.0; |
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$g = ((float)$rgb['g']) / 255.0; |
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$b = ((float)$rgb['b']) / 255.0; |
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$maxC = max($r, $g, $b); |
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$minC = min($r, $g, $b); |
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$l = ($maxC + $minC) / 2.0; |
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$s = 0; |
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$h = 0; |
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if ($maxC !== $minC) { |
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if ($l < .5) { |
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$s = ($maxC - $minC) / ($maxC + $minC); |
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} else { |
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$s = ($maxC - $minC) / (2.0 - $maxC - $minC); |
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} |
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if ($r === $maxC) { |
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$h = ($g - $b) / ($maxC - $minC); |
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} |
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if ($g === $maxC) { |
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$h = 2.0 + ($b - $r) / ($maxC - $minC); |
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} |
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if ($b === $maxC) { |
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$h = 4.0 + ($r - $g) / ($maxC - $minC); |
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} |
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$h /= 6.0; |
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} |
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$h = (int)round(360.0 * $h); |
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$s = (int)round(100.0 * $s); |
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$l = (int)round(100.0 * $l); |
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return ['h' => $h, 's' => $s, 'l' => $l]; |
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} |
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} |
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nystudio107 /
craft-imageoptimize
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