GammaCommand.php

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<?php
 
namespace Intervention\Image\Gd\Commands;
 
class GammaCommand extends \Intervention\Image\Commands\AbstractCommand
{
    public function execute($image)
    {
        $gamma = $this->argument(0)->type('numeric')->required()->value();
 
        return imagegammacorrect($image->getCore(), 1, $gamma);
    }
}