欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

将CMYK颜色值和RGB颜色相互转换的PHP代码

程序员文章站 2022-11-14 18:19:05
function hex2rgb($hex) { $color = str_replace('#','',$hex); $rgb = array('r' =&g...
function hex2rgb($hex) {
$color = str_replace('#','',$hex);
$rgb = array('r' => hexdec(substr($color,0,2)),
'g' => hexdec(substr($color,2,2)),
'b' => hexdec(substr($color,4,2)));
return $rgb;
} // www.jb51.net

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);
$cyan = @(($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);
}

$color=rgb2cmyk(hex2rgb('#ff0000'));