292 lines
No EOL
6.3 KiB
PHP
292 lines
No EOL
6.3 KiB
PHP
<?php
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class colors {
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/* Convert hexdec color string to rgb(a) string */
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function hex2rgba($color, $opacity = false) {
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$default = 'rgb(0,0,0)';
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//Return default if no color provided
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if(empty($color))
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return $default;
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//Sanitize $color if "#" is provided
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if ($color[0] == '#' ) {
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$color = substr( $color, 1 );
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}
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//Check if color has 6 or 3 characters and get values
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if (strlen($color) == 6) {
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$hex = array( $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5] );
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} elseif ( strlen( $color ) == 3 ) {
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$hex = array( $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2] );
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} else {
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return $default;
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}
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//Convert hexadec to rgb
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$rgb = array_map('hexdec', $hex);
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//Check if opacity is set(rgba or rgb)
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if($opacity){
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if(abs($opacity) > 1)
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$opacity = 1.0;
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$output = 'rgba('.implode(",",$rgb).','.$opacity.')';
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} else {
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$output = 'rgb('.implode(",",$rgb).')';
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}
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//Return rgb(a) color string
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return $output;
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}
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function hex2rgb( $colour ) {
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if ( $colour[0] == '#' ) {
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$colour = substr( $colour, 1 );
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}
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if ( strlen( $colour ) == 6 ) {
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list( $r, $g, $b ) = array( $colour[0] . $colour[1], $colour[2] . $colour[3], $colour[4] . $colour[5] );
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} elseif ( strlen( $colour ) == 3 ) {
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list( $r, $g, $b ) = array( $colour[0] . $colour[0], $colour[1] . $colour[1], $colour[2] . $colour[2] );
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} else {
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return false;
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}
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$r = hexdec( $r );
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$g = hexdec( $g );
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$b = hexdec( $b );
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return array( 'red' => $r, 'green' => $g, 'blue' => $b );
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}
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function rgbToHsl( $r, $g, $b ) {
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$oldR = $r;
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$oldG = $g;
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$oldB = $b;
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$r /= 255;
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$g /= 255;
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$b /= 255;
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$max = max( $r, $g, $b );
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$min = min( $r, $g, $b );
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$h;
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$s;
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$l = ( $max + $min ) / 2;
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$d = $max - $min;
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if( $d == 0 ){
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$h = $s = 0; // achromatic
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} else {
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$s = $d / ( 1 - abs( 2 * $l - 1 ) );
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switch( $max ){
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case $r:
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$h = 60 * fmod( ( ( $g - $b ) / $d ), 6 );
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if ($b > $g) {
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$h += 360;
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}
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break;
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case $g:
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$h = 60 * ( ( $b - $r ) / $d + 2 );
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break;
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case $b:
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$h = 60 * ( ( $r - $g ) / $d + 4 );
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break;
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}
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}
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return array( round( $h, 2 ), round( $s, 2 ), round( $l, 2 ) );
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}
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function hslToRgb( $h, $s, $l ){
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$r = "";
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$g = "";
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$b = "";
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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( floor( $r ), floor( $g ), floor( $b ) );
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}
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/*
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* Som more example code - this needs to be deletet if we don't need it in
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* the future
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*/
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function HTMLToRGB($htmlCode)
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{
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if($htmlCode[0] == '#')
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$htmlCode = substr($htmlCode, 1);
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if (strlen($htmlCode) == 3)
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{
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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 $b + ($g << 0x8) + ($r << 0x10);
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}
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function RGBToHTML($RGB)
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{
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$r = 0xFF & ($RGB >> 0x10);
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$g = 0xFF & ($RGB >> 0x8);
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$b = 0xFF & $RGB;
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$r = dechex($r);
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$g = dechex($g);
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$b = dechex($b);
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return "#" . str_pad($r, 2, "0", STR_PAD_LEFT) . str_pad($g, 2, "0", STR_PAD_LEFT) . str_pad($b, 2, "0", STR_PAD_LEFT);
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}
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function ChangeLuminosity($RGB, $LuminosityPercent)
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{
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$HSL = RGBToHSL($RGB);
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$NewHSL = (int)(((float)$LuminosityPercent / 100) * 255) + (0xFFFF00 & $HSL);
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return HSLToRGB($NewHSL);
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}
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function RGBToHSL($RGB)
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{
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$r = 0xFF & ($RGB >> 0x10);
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$g = 0xFF & ($RGB >> 0x8);
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$b = 0xFF & $RGB;
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$r = ((float)$r) / 255.0;
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$g = ((float)$g) / 255.0;
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$b = ((float)$b) / 255.0;
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$maxC = max($r, $g, $b);
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$minC = min($r, $g, $b);
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$l = ($maxC + $minC) / 2.0;
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if($maxC == $minC)
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{
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$s = 0;
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$h = 0;
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}
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else
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{
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if($l < .5)
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{
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$s = ($maxC - $minC) / ($maxC + $minC);
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}
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else
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{
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$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 - $minC);
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if($g == $maxC)
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$h = 2.0 + ($b - $r) / ($maxC - $minC);
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if($b == $maxC)
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$h = 4.0 + ($r - $g) / ($maxC - $minC);
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$h = $h / 6.0;
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}
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$h = (int)round(255.0 * $h);
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$s = (int)round(255.0 * $s);
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$l = (int)round(255.0 * $l);
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$HSL = $l + ($s << 0x8) + ($h << 0x10);
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return $HSL;
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}
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function HSLToRGB($HSL)
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{
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$h = 0xFF & ($HSL >> 0x10);
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$s = 0xFF & ($HSL >> 0x8);
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$l = 0xFF & $HSL;
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$h = ((float)$h) / 255.0;
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$s = ((float)$s) / 255.0;
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$l = ((float)$l) / 255.0;
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if($s == 0)
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{
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$r = $l;
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$g = $l;
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$b = $l;
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}
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else
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{
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if($l < .5)
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{
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$t2 = $l * (1.0 + $s);
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}
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else
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{
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$t2 = ($l + $s) - ($l * $s);
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}
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$t1 = 2.0 * $l - $t2;
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$rt3 = $h + 1.0/3.0;
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$gt3 = $h;
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$bt3 = $h - 1.0/3.0;
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if($rt3 < 0) $rt3 += 1.0;
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if($rt3 > 1) $rt3 -= 1.0;
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if($gt3 < 0) $gt3 += 1.0;
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if($gt3 > 1) $gt3 -= 1.0;
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if($bt3 < 0) $bt3 += 1.0;
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if($bt3 > 1) $bt3 -= 1.0;
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if(6.0 * $rt3 < 1) $r = $t1 + ($t2 - $t1) * 6.0 * $rt3;
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elseif(2.0 * $rt3 < 1) $r = $t2;
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elseif(3.0 * $rt3 < 2) $r = $t1 + ($t2 - $t1) * ((2.0/3.0) - $rt3) * 6.0;
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else $r = $t1;
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if(6.0 * $gt3 < 1) $g = $t1 + ($t2 - $t1) * 6.0 * $gt3;
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elseif(2.0 * $gt3 < 1) $g = $t2;
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elseif(3.0 * $gt3 < 2) $g = $t1 + ($t2 - $t1) * ((2.0/3.0) - $gt3) * 6.0;
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else $g = $t1;
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if(6.0 * $bt3 < 1) $b = $t1 + ($t2 - $t1) * 6.0 * $bt3;
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elseif(2.0 * $bt3 < 1) $b = $t2;
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elseif(3.0 * $bt3 < 2) $b = $t1 + ($t2 - $t1) * ((2.0/3.0) - $bt3) * 6.0;
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else $b = $t1;
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}
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$r = (int)round(255.0 * $r);
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$g = (int)round(255.0 * $g);
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$b = (int)round(255.0 * $b);
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$RGB = $b + ($g << 0x8) + ($r << 0x10);
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return $RGB;
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}
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} |