Driver.php

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<?php
 
namespace Intervention\Image\Gd;
 
use \Intervention\Image\Size;
 
class Driver extends \Intervention\Image\AbstractDriver
{
    public function __construct(Decoder $decoder = null, Encoder $encoder = null)
    {
        if ( ! $this->coreAvailable()) {
            throw new \Intervention\Image\Exception\NotSupportedException(
                "GD Library extension not available with this PHP installation."
            );
        }
 
        $this->decoder = $decoder ? $decoder : new Decoder;
        $this->encoder = $encoder ? $encoder : new Encoder;
    }
 
    public function newImage($width, $height, $background = null)
    {
        // create empty resource
        $core = imagecreatetruecolor($width, $height);
        $image = new \Intervention\Image\Image(new self, $core);
 
        // set background color
        $background = new Color($background);
        imagefill($image->getCore(), 0, 0, $background->getInt());
 
        return $image;
    }
 
    public function parseColor($value)
    {
        return new Color($value);
    }
 
    protected function coreAvailable()
    {
        return (extension_loaded('gd') && function_exists('gd_info'));
    }
 
    public function cloneCore($core)
    {
        $width = imagesx($core);
        $height = imagesy($core);
        $clone = imagecreatetruecolor($width, $height);
        imagealphablending($clone, false);
        imagesavealpha($clone, true);
        
        imagecopy($clone, $core, 0, 0, 0, 0, $width, $height);
 
        return $clone;
    }
}