PHP Image Class

<?php

/**
 * @author      [email protected]
 * @license     (c) 2015
 */

class Image
{

    private $Img = null;
    private $File = "";
    private $Width = 0;
    private $Height = 0;

    /**
     * @param string $Source
     */
    public function __construct($Source)
    {
        $FileExt = file_ext($Source);

        switch($FileExt) {
            case "png": {
                $this->Img = $this->fromPNG($Source);
            } break;
            case "jpeg":
            case "jpg": {
                $this->Img = $this->fromJPEG($Source);
            } break;
        }

        $this->File = $Source;
        list($this->Width, $this->Height) = getimagesize($this->File);
    }

    /**
     * @param string $Source
     * @return resource
     */
    private function fromPNG($Source)
    {
        $Img = imagecreatefrompng($Source);
        imagesavealpha($Img, true);
        imagealphablending($Img, true);

        return $Img;
    }

    /**
     * @param string $Source
     * @return resource
     */
    private function fromJPEG($Source)
    {
        $Img = imagecreatefromjpeg($Source);
        imagesavealpha($Img, true);
        imagealphablending($Img, true);

        return $Img;
    }

    /**
     * @param int $Width
     * @param int $Height
     * @return resource
     */
    public static function createTransparent($Width, $Height)
    {
        $Img = imagecreatetruecolor($Width, $Height);
        imagesavealpha($Img, true);
        imagealphablending($Img, true);
        $Transparent = imagecolorallocatealpha($Img, 0, 0, 0, 127);
        imagefill($Img, 0, 0, $Transparent);

        return $Img;
    }

    public function Square()
    {
        $NewWidth = $this->Width;
        $NewHeight = $this->Height;
        $OffsetX = 0;
        $OffsetY = 0;

        if($this->Width > $this->Height) {
            $NewWidth = $this->Height;
            $OffsetX = $this->Width / 2 - $NewWidth / 2;
        }
        else if($this->Height > $this->Width) {
            $NewHeight = $this->Width;
            $OffsetY = $this->Height / 2 - $NewHeight / 2;
        }

        $Img = $this->createTransparent($NewWidth, $NewHeight);

        imagecopy($Img, $this->Img, 0, 0, $OffsetX, $OffsetY, $NewWidth, $NewHeight);

        $this->Img = $Img;
        $this->Width = $NewWidth;
        $this->Height = $NewHeight;

        return $this;
    }

    /**
     * @param int $MaxWidth
     * @param int $MaxHeight
     * @return Image
     */
    public function Resize($MaxWidth, $MaxHeight)
    {
        $Width = $this->Width;
        $Height = $this->Height;

        if ($Width > $MaxHeight) {
            $Width = ($MaxHeight / $Height) * $Width;
            $Height = $MaxHeight;
        }

        if ($Width > $MaxWidth) {
            $Height = ($MaxWidth / $Width) * $Height;
            $Width = $MaxWidth;
        }

        $image_p = imagecreatetruecolor($Width, $Height);

        imagecopyresampled($image_p, $this->Img, 0, 0, 0, 0, $Width, $Height, $this->Width, $this->Height);

        $this->Img = $image_p;

        return $this;
    }

    public function Display()
    {
        header("Content-type: image/png");
        imagepng($this->Img);

        return $this;
    }

    public function Save($Destination)
    {
        imagepng($this->Img, $Destination);

        return $this;
    }

}