PHP Imagick透明问题与PNG

Question

I am using imagemagick 6.8.4-6 and i'm having an issue with setting the PNG on rotate to have a transparent background. My code is below and i am using imagick through php

$base = new Imagick("images/Champs-43.png"); 
$layer = new Imagick("images/coporate1.png");
$base->setFormat("png32");
$layer->setFormat("png32");
$layer->rotateImage(new ImagickPixel("none"), 45);

$base->compositeImage($layer, imagick::COMPOSITE_DEFAULT, 20, 20);
header('Content-Type: image/png');
echo $base;

the above gives a black background to the area rotated. i have tried "none", "transparent", "#00000000", and "rgba(0, 0, 0, 0.0)" and none of them seem to work.

Any help appreciated

Answer 1

Try explicitly setting the ImagickPixel.

You can try these:

$layer->rotateImage(new ImagickPixel('#FFFFFF'), 45);

or

$layer->rotateImage(new ImagickPixel('#00000000', 45);