Your IP : 216.73.216.11
<?php
/**
* @package Shortcode Ultimate
* @author BdThemes http://www.bdthemes.com
* @copyright Copyright (C) BdThemes Ltd
* @license http://www.gnu.org/licenses/gpl.html GNU/GPL
*/
defined('_JEXEC') or die;
class su_color {
private static function lib_lighten($args) {
list($color, $delta) = self::colorArgs($args);
$hsl = self::toHSL($color);
$hsl[3] = self::clamp($hsl[3] + $delta, 100);
return self::toRGB($hsl);
}
private static function lib_darken($args) {
list($color, $delta) = self::colorArgs($args);
$hsl = self::toHSL($color);
$hsl[3] = self::clamp($hsl[3] - $delta, 100);
return self::toRGB($hsl);
}
private static function colorArgs($args) {
if ($args[0] != 'list' || count($args[2]) < 2) {
return array(array('color', 0, 0, 0));
}
list($color, $delta) = $args[2];
if ($color[0] != 'color')
$color = array('color', 0, 0, 0);
$delta = floatval($delta[1]);
return array($color, $delta);
}
private static function toHSL($color) {
if ($color[0] == 'hsl') return $color;
$r = $color[1] / 255;
$g = $color[2] / 255;
$b = $color[3] / 255;
$min = min($r, $g, $b);
$max = max($r, $g, $b);
$L = ($min + $max) / 2;
if ($min == $max) {
$S = $H = 0;
} else {
if ($L < 0.5)
$S = ($max - $min)/($max + $min);
else
$S = ($max - $min)/(2.0 - $max - $min);
if ($r == $max) $H = ($g - $b)/($max - $min);
elseif ($g == $max) $H = 2.0 + ($b - $r)/($max - $min);
elseif ($b == $max) $H = 4.0 + ($r - $g)/($max - $min);
}
$out = array('hsl',
($H < 0 ? $H + 6 : $H)*60,
$S*100,
$L*100,
);
if (count($color) > 4) $out[] = $color[4]; // copy alpha
return $out;
}
private static function toRGB_helper($comp, $temp1, $temp2) {
if ($comp < 0) $comp += 1.0;
elseif ($comp > 1) $comp -= 1.0;
if (6 * $comp < 1) return $temp1 + ($temp2 - $temp1) * 6 * $comp;
if (2 * $comp < 1) return $temp2;
if (3 * $comp < 2) return $temp1 + ($temp2 - $temp1)*((2/3) - $comp) * 6;
return $temp1;
}
public static function toRGB($color) {
if ($color == 'color') return $color;
$H = $color[1] / 360;
$S = $color[2] / 100;
$L = $color[3] / 100;
if ($S == 0) {
$r = $g = $b = $L;
} else {
$temp2 = $L < 0.5 ?
$L*(1.0 + $S) :
$L + $S - $L * $S;
$temp1 = 2.0 * $L - $temp2;
$r = self::toRGB_helper($H + 1/3, $temp1, $temp2);
$g = self::toRGB_helper($H, $temp1, $temp2);
$b = self::toRGB_helper($H - 1/3, $temp1, $temp2);
}
$out = array('color', round($r*255), round($g*255), round($b*255));
if (count($color) > 4) $out[] = $color[4]; // copy alpha
return $out;
}
public static function clamp($v, $max = 1, $min = 0) {
return min($max, max($min, $v));
}
public static function rgbaToHex($color) {
if ($color[0] != 'color')
throw new exception("color expected for rgbahex");
return sprintf("#%02x%02x%02x",
$color[1],$color[2], $color[3]);
}
public static function _hexToRgb($hexStr, $returnAsString = false, $seperator = ',') {
$hexStr = preg_replace("/[^0-9A-Fa-f]/", '', $hexStr); // Gets a proper hex string
$rgbArray = array();
$rgbArray[] = 'color';
if (strlen($hexStr) == 6) { //If a proper hex code, convert using bitwise operation. No overhead... faster
$colorVal = hexdec($hexStr);
$rgbArray[] = 0xFF & ($colorVal >> 0x10);
$rgbArray[] = 0xFF & ($colorVal >> 0x8);
$rgbArray[] = 0xFF & $colorVal;
} elseif (strlen($hexStr) == 3) { //if shorthand notation, need some string manipulations
$rgbArray[] = hexdec(str_repeat(substr($hexStr, 0, 1), 2));
$rgbArray[] = hexdec(str_repeat(substr($hexStr, 1, 1), 2));
$rgbArray[] = hexdec(str_repeat(substr($hexStr, 2, 1), 2));
} else {
return false; //Invalid hex color code
}
return $returnAsString ? implode($seperator, $rgbArray) : $rgbArray; // returns the rgb string or the associative array
}
public static function _inverseHex($color) {
$prependHash = FALSE;
IF(STRPOS($color,'#')!==FALSE) {
$prependHash = TRUE;
$color = STR_REPLACE('#',NULL,$color);
}
SWITCH($len=STRLEN($color)) {
case 3:
$color=PREG_REPLACE("/(.)(.)(.)/","\\1\\1\\2\\2\\3\\3",$color);
case 6:
break;
default:
TRIGGER_ERROR("Invalid hex length ($len). Must be (3) or (6)", E_USER_ERROR);
}
IF(!PREG_MATCH('/[a-f0-9]{6}/i',$color)) {
$color = HTMLENTITIES($color);
TRIGGER_ERROR( "Invalid hex string #$color", E_USER_ERROR );
}
$r = DECHEX(255-HEXDEC(SUBSTR($color,0,2)));
$r = (STRLEN($r)>1)?$r:'0'.$r;
$g = DECHEX(255-HEXDEC(SUBSTR($color,2,2)));
$g = (STRLEN($g)>1)?$g:'0'.$g;
$b = DECHEX(255-HEXDEC(SUBSTR($color,4,2)));
$b = (STRLEN($b)>1)?$b:'0'.$b;
return ($prependHash?'#':NULL).$r.$g.$b;
}
// static method for color change
public static function hexToRgb($hexStr, $returnAsString = false, $seperator = ','){
$hexStr = preg_replace("/[^0-9A-Fa-f]/", '', $hexStr);
$rgbArray = array();
if (strlen($hexStr) == 6){
$colorVal = hexdec($hexStr);
$rgbArray['red'] = 0xFF & ($colorVal >> 0x10);
$rgbArray['green'] = 0xFF & ($colorVal >> 0x8);
$rgbArray['blue'] = 0xFF & $colorVal;
} elseif (strlen($hexStr) == 3){
$rgbArray['red'] = hexdec(str_repeat(substr($hexStr, 0, 1), 2));
$rgbArray['green'] = hexdec(str_repeat(substr($hexStr, 1, 1), 2));
$rgbArray['blue'] = hexdec(str_repeat(substr($hexStr, 2, 1), 2));
} else {
return false;
}
return $returnAsString ? implode($seperator, $rgbArray) : $rgbArray;
}
public static function rgba($hex, $opacity){
return 'rgba(' . self::hexToRgb($hex, true) . ','.$opacity.')';
}
public static function lighten($color, $pc = '5%'){
$pc = str_replace('%', '', $pc);
$args = array('list', ',', array(self::_hexToRgb($color), array('%', $pc)));
$rgb = array_slice(self::lib_lighten($args), 1);
return self::rgbaToHex(self::lib_lighten($args));
}
public static function darken($color, $pc = '5%'){
$pc = str_replace('%', '', $pc);
$args = array('list', ',', array(self::_hexToRgb($color), array('%', $pc)));
$rgb = array_slice(self::lib_darken($args), 1);
return self::rgbaToHex(self::lib_darken($args));
}
public static function inverse($color){
$color = self::_inverseHex($color);
$args = self::_hexToRgb($color);
return self::rgbaToHex($args);
}
}