public static function average_color($image_url, $x1 = 0, $y1 = 0, $x2 = NULL, $y2 = NULL)
{
$im = self::getImageFromUrl($image_url);
//Begin getting average
$width = is_null($x2) ? imagesx($im) : $x2;
$height = is_null($y2) ? imagesy($im) : $y2;
$total = $r = $g = $b = $a = 0;
for ($x = $x1; $x < $width; $x++) {
for ($y = $y1; $y < $height; $y++) {
//get rgba array at index
$index = imagecolorat($im, $x, $y);
$rgba = imagecolorsforindex($im, $index);
//add total for each color
$r += $rgba['red'];
$g += $rgba['green'];
$b += $rgba['blue'];
$a += $rgba['alpha'];
$total++;
unset($index);
unset($rgba);
}
// end for $y
}
// end for $x
unset($im);
$avg = array('red' => round($r / $total), 'green' => round($g / $total), 'blue' => round($b / $total), 'alpha' => round($a / $total));
$rgba = Rgba::create($avg);
unset($r);
unset($g);
unset($b);
unset($a);
// return (array)$avg;
return $rgba;
}
public static function createRgba(Rgba $rgba)
{
return new Color($rgba->toArray());
}