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PHP and Javascript solutions to moderate challenge #148 - Color code converter : CMYN, HSL, HSV, and HEX conversion to RGB
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‎moderate/148 - Color code converter/148.js‎

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// https://www.codeeval.com/open_challenges/148/
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var hue2rgb = function(p, q, t){
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if(t < 0) t += 1;
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if(t > 1) t -= 1;
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if(t < 1/6) return p + (q - p) * 6 * t;
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if(t < 1/2) return q;
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if(t < 2/3) return p + (q - p) * (2/3 - t) * 6;
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return p;
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};
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var hsl_to_rgb = function(hsl){
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var h = Number(hsl[0] / 360);
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var s = Number(hsl[1] / 100);
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var l = Number(hsl[2] / 100);
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var r, g, b;
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if(s === 0){
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r = g = b = l; // achromatic
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}else{
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var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
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var p = 2 * l - q;
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r = hue2rgb(p, q, h + 1/3);
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g = hue2rgb(p, q, h);
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b = hue2rgb(p, q, h - 1/3);
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}
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return {'r': Math.round(r * 255), 'g': Math.round(g * 255), 'b': Math.round(b * 255) };
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};
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var hsv_to_rgb = function(hsv){
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var h = Number(hsv[0] / 360);
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var s = Number(hsv[1] / 100);
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var v = Number(hsv[2] / 100);
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var r, g, b;
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var i = Math.floor(h * 6);
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var f = h * 6 - i;
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var p = v * (1 - s);
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var q = v * (1 - f * s);
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var t = v * (1 - (1 - f) * s);
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switch(i % 6){
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case 0: r = v, g = t, b = p; break;
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case 1: r = q, g = v, b = p; break;
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case 2: r = p, g = v, b = t; break;
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case 3: r = p, g = q, b = v; break;
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case 4: r = t, g = p, b = v; break;
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case 5: r = v, g = p, b = q; break;
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}
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return {'r': Math.round(r * 255), 'g': Math.round(g * 255), 'b': Math.round(b * 255) };
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};
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var cmyk_to_rgb = function(cmyk){
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var c = cmyk[0];
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var m = cmyk[1];
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var y = cmyk[2];
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var k = cmyk[3];
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var r = ( 1 - (c * (1 - k)) - k ) * 255;
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var g = ( 1 - (m * (1 - k)) - k ) * 255;
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var b = ( 1 - (y * (1 - k)) - k ) * 255;
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if( r<0 ) r = 0 ;
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if( g<0 ) g = 0 ;
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if (b<0 ) b = 0 ;
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return {'r': Math.round(r), 'g': Math.round(g), 'b': Math.round(b) };
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}; //cmyk_to_rgb
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var hex_to_rgb = function(hex){
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var int = parseInt( hex, 16 );
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return {'r': 0xFF & (int >> 0x10), 'g': 0xFF & (int >> 0x8), 'b': 0xFF & int};
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};//hex_to_rgb
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var fs = require("fs");
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fs.readFileSync(process.argv[2]).toString().split('\n').forEach(function (line) {
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line = line.trim();
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if( line !== '' ){
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var rgb = false;
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if( line.indexOf('#') === 0 ){
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// hex
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rgb = hex_to_rgb( line.substr(1) );
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}
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else if( null !== (matches = line.match(/^(HSL|HSV|RGB|)?\((.*)\)$/) ) ){
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var c = matches[2].split(',');
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switch( matches[1] ){
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case 'HSL' :
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rgb = hsl_to_rgb(c);
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break;
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case 'HSV' :
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rgb = hsv_to_rgb(c);
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break;
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default :
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rgb = cmyk_to_rgb(c);
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break;
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}//
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}
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if( rgb ){
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console.log( 'RGB(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ')' );
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}
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}//
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});

‎moderate/148 - Color code converter/148.php‎

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<?php
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header('Content-Type: text/plain; charset=utf-8');
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// https://www.codeeval.com/open_challenges/148/
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if( isset($_GET['f_i_l_e']) && $_GET['f_i_l_e'] ) $argv[1] = $_GET['f_i_l_e'];
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function hsl_to_rgb($hsl){
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list($h,$s,$l) = $hsl;
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$s /= 100;
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$l /= 100;
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$c = ( 1 - abs( 2 * $l - 1 ) ) * $s;
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$x = $c * ( 1 - abs( fmod( ( $h / 60 ), 2 ) - 1 ) );
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$m = $l - ( $c / 2 );
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if ( $h < 60 ) {
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$r = $c;
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$g = $x;
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$b = 0;
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} else if ( $h < 120 ) {
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$r = $x;
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$g = $c;
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$b = 0;
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} else if ( $h < 180 ) {
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$r = 0;
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$g = $c;
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$b = $x;
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} else if ( $h < 240 ) {
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$r = 0;
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$g = $x;
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$b = $c;
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} else if ( $h < 300 ) {
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$r = $x;
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$g = 0;
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$b = $c;
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} else {
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$r = $c;
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$g = 0;
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$b = $x;
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}
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$r = ( $r + $m ) * 255;
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$g = ( $g + $m ) * 255;
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$b = ( $b + $m ) * 255;
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return array( 'r' => round($r), 'g' => round($g), 'b' => round($b) );
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}//hsl_to_rgb
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function hsv_to_rgb($hsv){
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// echo 'hsv_to_rgb(' . var_export($hsv,true) . ')' . "\n";
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list($h, $s, $v) = $hsv;
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$s /= 100;
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$v /= 100;
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$c = $v * $s;
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$x = $c * ( 1 - abs( fmod( ( $h / 60 ), 2 ) - 1 ) );
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$m = $v - $c;
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if ( $h < 60 ) {
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$r = $c;
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$g = $x;
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$b = 0;
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} else if ( $h < 120 ) {
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$r = $x;
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$g = $c;
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$b = 0;
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} else if ( $h < 180 ) {
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$r = 0;
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$g = $c;
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$b = $x;
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} else if ( $h < 240 ) {
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$r = 0;
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$g = $x;
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$b = $c;
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} else if ( $h < 300 ) {
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$r = $x;
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$g = 0;
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$b = $c;
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} else {
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$r = $c;
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$g = 0;
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$b = $x;
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}
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$r = ( $r + $m ) * 255;
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$g = ( $g + $m ) * 255;
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$b = ( $b + $m ) * 255;
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return array( 'r' => round($r), 'g' => round($g), 'b' => round($b) );
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}//hsv_to_rgb
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function cmyk_to_rgb($cmyk){
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// echo 'cmyk_to_rgb(' . var_export($cmyk,true) . ')' . "\n";
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list($c, $m, $y, $k) = $cmyk;
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$r = (1 - ($c * (1 - $k)) - $k ) * 255;
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$g = ( 1 - ($m * (1 - $k)) - $k ) * 255;
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$b = ( 1 - ($y * (1 - $k)) - $k ) * 255;
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if($r<0) $r = 0 ;
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if($g<0) $g = 0 ;
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if($b<0) $b = 0 ;
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return array('r' => round($r), 'g' => round($g), 'b' => round($b) );
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}//cmyk_to_rgb
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function hex_to_rgb($hex){
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// echo 'hex_to_rgb(' . $hex . ')' . "\n";
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$int = hexdec($hex);
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return array('r' => 0xFF & ($int >> 0x10), 'g' => 0xFF & ($int >> 0x8), 'b' => 0xFF & $int);
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}//hex_to_rgb
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if( isset($argv[1]) && $argv[1] ){
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$filename = $argv[1];
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if( file_exists($filename) ){
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if( is_readable($filename) ){
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$fp = fopen($filename, 'r');
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if( $fp ){
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while ( $fp && !feof( $fp ) ) {
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$line = trim(fgets($fp));
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if( $line ){
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// echo ' => '. $line."\n";
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$rgb = false;
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if( strpos($line,'#') === 0 ){
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// hex
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$rgb = hex_to_rgb(substr($line,1));
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}
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else if( preg_match('/^(HSL|HSV|RGB|)?\((.*)\)$/',$line,$matches) ){
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$c = explode(',',$matches[2]);
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switch($matches[1]){
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case 'HSL' :
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$rgb = hsl_to_rgb($c);
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break;
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case 'HSV' :
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$rgb = hsv_to_rgb($c);
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break;
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case '' :
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$rgb = cmyk_to_rgb($c);
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break;
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}//
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}
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if( $rgb ){
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echo 'RGB('.$rgb['r'].','.$rgb['g'].','.$rgb['b'].')' . "\n";
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}//
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}
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}//
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fclose( $fp );
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}
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else{
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echo '!fp'."\n";
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}
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}
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else{
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echo '!readable'."\n";
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}
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}
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else{
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echo '!file_exists'."\n";
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}
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}
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else{
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echo '!argv[1]'."\n";
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}
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exit(0);
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?>

‎moderate/148 - Color code converter/test.txt‎

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(0.56,0.94,0.21,0.02)
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HSL(359,0,0)
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HSV(276,33,7)
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#cfa9c4

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