public function luminance($color = null)
{
if (!$color instanceof Less_Tree_Color) {
throw new Less_Exception_Compiler('The first argument to luminance must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : ''));
}
$luminance = 0.2126 * $color->rgb[0] / 255 + 0.7151999999999999 * $color->rgb[1] / 255 + 0.0722 * $color->rgb[2] / 255;
return new Less_Tree_Dimension(Less_Parser::round($luminance * $color->alpha * 100), '%');
}
public function toHex($v)
{
$ret = '#';
foreach ($v as $c) {
$c = Less_Functions::clamp(Less_Parser::round($c), 255);
if ($c < 16) {
$ret .= '0';
}
$ret .= dechex($c);
}
return $ret;
}
public function luminance($color)
{
$luminance = 0.2126 * $color->rgb[0] / 255 + 0.7151999999999999 * $color->rgb[1] / 255 + 0.0722 * $color->rgb[2] / 255;
return new Less_Tree_Dimension(Less_Parser::round($luminance * $color->alpha * 100), '%');
}
public function toARGB()
{
$argb = array_merge((array) Less_Parser::round($this->alpha * 255), $this->rgb);
$temp = '';
foreach ($argb as $i) {
$i = Less_Parser::round($i);
$i = dechex($i > 255 ? 255 : ($i < 0 ? 0 : $i));
$temp .= str_pad($i, 2, '0', STR_PAD_LEFT);
}
return '#' . $temp;
}
public function luma($color)
{
return new Less_Tree_Dimension(Less_Parser::round($color->luma() * $color->alpha * 100), '%');
}
public function toARGB()
{
$argb = array_merge((array) Less_Parser::round($this->alpha * 255), $this->rgb);
return $this->toHex($argb);
}
