My class that I used to produce and convert color values.
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<?php | |
class dColors{ | |
CONST WHITE = "#FFFFFF"; | |
CONST BLACK = "#000000"; | |
CONST RED = "#FF0000"; | |
CONST GREEN = "#00FF00"; | |
CONST BLUE = "#0000FF"; | |
public static function hex2rgb($hex) | |
{ | |
$color = str_replace('#','',$hex); | |
return array('r' => hexdec(substr($color,0,2)), | |
'g' => hexdec(substr($color,2,2)), | |
'b' => hexdec(substr($color,4,2))); | |
} | |
public static function rgb2cmyk($var1,$g=0,$b=0) | |
{ | |
if(is_array($var1)) { | |
$r = $var1['r']; | |
$g = $var1['g']; | |
$b = $var1['b']; | |
} | |
else $r=$var1; | |
$cyan = 255 - $r; | |
$magenta = 255 - $g; | |
$yellow = 255 - $b; | |
$black = min($cyan, $magenta, $yellow); | |
if($black==255){ | |
return array('c' => 1, | |
'm' => 1, | |
'y' => 1, | |
'k' => 1); | |
} | |
$cyan = @(($cyan - $black) / (255 - $black)) * 255; | |
$magenta = @(($magenta - $black) / (255 - $black)) * 255; | |
$yellow = @(($yellow - $black) / (255 - $black)) * 255; | |
return array('c' => $cyan / 255, | |
'm' => $magenta / 255, | |
'y' => $yellow / 255, | |
'k' => $black / 255); | |
} | |
public static function cmyk2rgb($c,$m,$y,$k) | |
{ | |
$red = $c + $k; | |
$green = $m + $k; | |
$blue = $y + $k; | |
$red = ($red - 100) * (-1); | |
$green = ($green - 100) * (-1); | |
$blue = ($blue - 100) * (-1); | |
$red = round($red / 100 * 255, 0); | |
$green = round($green / 100 * 255, 0); | |
$blue = round($blue / 100 * 255, 0); | |
return array('r' => $red, | |
'g' => $green, | |
'b' => $blue); | |
} | |
public static function hex2cmyk($hex) | |
{ | |
return self::rgb2cmyk(self::hex2rgb($hex)); | |
} | |
public static function convert($color,$return='cmyk') | |
{ | |
/** | |
* $color: | |
* - string: hex | |
* - array(3): rgb | |
* - array(4): cmyk | |
* $return: | |
* - array(3): rgb | |
* - array(4): cmyk | |
*/ | |
if(is_string($color)){ | |
// hex | |
switch($return){ | |
case 'cmyk': | |
return self::hex2cmyk($color); | |
break; | |
case 'rgb': | |
return self::hex2rgb($color); | |
break; | |
default: | |
return false; | |
} | |
}elseif(is_array($color) && count($color)==3){ | |
// rgb | |
switch($return){ | |
case 'cmyk': | |
return self::rgb2cmyk($color); | |
break; | |
case 'rgb': | |
return array('r'=>$color[0],'g'=>$color[1],'b'=>$color[2]); | |
break; | |
default: | |
return false; | |
} | |
}elseif(is_array($color) && count($color)==4){ | |
// cmyk | |
switch($return){ | |
case 'cmyk': | |
return array('c'=>$color[0]/100,'m'=>$color[1]/100,'y'=>$color[2]/100,'k'=>$color[3]/100); | |
break; | |
case 'rgb': | |
return self::cmyk2rgb($color[0],$color[1],$color[2],$color[3]); | |
break; | |
default: | |
return false; | |
} | |
}else{ | |
return false; | |
} | |
} | |
} |
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