argument(0)->value(); $mask_w_alpha = $this->argument(1)->type('bool')->value(false); // get imagick $imagick = $image->getCore(); // build mask image from source $mask = $image->getDriver()->init($mask_source); // resize mask to size of current image (if necessary) $image_size = $image->getSize(); if ($mask->getSize() != $image_size) { $mask->resize($image_size->width, $image_size->height); } $imagick->setImageMatte(true); if ($mask_w_alpha) { // just mask with alpha map $imagick->compositeImage($mask->getCore(), \Imagick::COMPOSITE_DSTIN, 0, 0); } else { // get alpha channel of original as greyscale image $original_alpha = clone $imagick; $original_alpha->separateImageChannel(\Imagick::CHANNEL_ALPHA); // use red channel from mask ask alpha $mask_alpha = clone $mask->getCore(); $mask_alpha->compositeImage($mask->getCore(), \Imagick::COMPOSITE_DEFAULT, 0, 0); // $mask_alpha->setImageAlphaChannel(\Imagick::ALPHACHANNEL_DEACTIVATE); $mask_alpha->separateImageChannel(\Imagick::CHANNEL_ALL); // combine both alphas from original and mask $original_alpha->compositeImage($mask_alpha, \Imagick::COMPOSITE_COPYOPACITY, 0, 0); // mask the image with the alpha combination $imagick->compositeImage($original_alpha, \Imagick::COMPOSITE_DSTIN, 0, 0); } return true; } }