<?php
namespace Intervention\Image\Imagick\Commands;
use Intervention\Image\Commands\AbstractCommand;
class LimitColorsCommand extends AbstractCommand
{
/**
* Reduces colors of a given image
*
* @param \Intervention\Image\Image $image
* @return boolean
*/
public function execute($image)
{
$count = $this->argument(0)->value();
$matte = $this->argument(1)->value();
// get current image size
$size = $image->getSize();
// build 2 color alpha mask from original alpha
$alpha = clone $image->getCore();
$alpha->separateImageChannel(\Imagick::CHANNEL_ALPHA);
$alpha->transparentPaintImage('#ffffff', 0, 0, false);
$alpha->separateImageChannel(\Imagick::CHANNEL_ALPHA);
$alpha->negateImage(false);
if ($matte) {
// get matte color
$mattecolor = $image->getDriver()->parseColor($matte)->getPixel();
// create matte image
$canvas = new \Imagick;
$canvas->newImage($size->width, $size->height, $mattecolor, 'png');
// lower colors of original and copy to matte
$image->getCore()->quantizeImage($count, \Imagick::COLORSPACE_RGB, 0, false, false);
$canvas->compositeImage($image->getCore(), \Imagick::COMPOSITE_DEFAULT, 0, 0);
// copy new alpha to canvas
$canvas->compositeImage($alpha, \Imagick::COMPOSITE_COPYOPACITY, 0, 0);
// replace core
$image->setCore($canvas);
} else {
$image->getCore()->quantizeImage($count, \Imagick::COLORSPACE_RGB, 0, false, false);
$image->getCore()->compositeImage($alpha, \Imagick::COMPOSITE_COPYOPACITY, 0, 0);
}
return true;
}
}