PHP Decode

--TEST--
imagepalettecopy
--EXTENSIONS--
gd
--FILE--
<?php
$failed = false;
$im = imagecreate(1,1);
for ($i=0; $i<256; $i++) {
    imagecolorallocate($im, $i, $i, $i);
}

$im2 = imagecreate(1,1);
imagepalettecopy($im2, $im);

for ($i=0; $i<256; $i++) {
    $c = imagecolorsforindex($im2, $i);
    if ($c['red']!=$i || $c['green']!=$i || $c['blue']!=$i) {
        $failed = true;
        break;
    }
}
echo "copy palette 255 colors: ";
echo $failed ? 'failed' : 'ok';
echo "\n";

$im = imagecreate(1,1);
$im2 = imagecreate(1,1);
imagecolorallocatealpha($im, 0,0,0,100);

imagepalettecopy($im2, $im);
$c = imagecolorsforindex($im2, 0);
if ($c['red']!=0 || $c['green']!=0 || $c['blue']!=0 || $c['alpha']!=100) {
    $failed = true;
}
echo 'copy palette 1 color and alpha: ';
echo $failed ? 'failed' : 'ok';
echo "\n";
?>
--EXPECT--
copy palette 255 colors: ok
copy palette 1 color and alpha: ok