Untitled

<?php

class CircleCrop
{

    private $src_img;
    private $src_w;
    private $src_h;
    private $dst_img;
    private $dst_w;
    private $dst_h;

    public function __construct($img)
    {
        $this->src_img = $img;
        $this->src_w = imagesx($img);
        $this->src_h = imagesy($img);
        $this->dst_w = imagesx($img);
        $this->dst_h = imagesy($img);
    }

    public function __destruct()
    {
        if (is_resource($this->dst_img))
        {
            imagedestroy($this->dst_img);
        }
    }

    public function display()
    {
        header("Content-type: image/png");
        imagepng($this->dst_img);
        return $this;
    }

    public function reset()
    {
        if (is_resource(($this->dst_img)))
        {
            imagedestroy($this->dst_img);
        }
        $this->dst_img = imagecreatetruecolor($this->dst_w, $this->dst_h);
        imagecopy($this->dst_img, $this->src_img, 0, 0, 0, 0, $this->dst_w, $this->dst_h);
        return $this;
    }

    public function size($dstWidth, $dstHeight)
    {
        $this->dst_w = $dstWidth;
        $this->dst_h = $dstHeight;
        return $this->reset();
    }

    public function crop()
    {
        // Intializes destination image
        $this->reset();

        // Create a black image with a transparent ellipse, and merge with destination
        $mask = imagecreatetruecolor($this->dst_w, $this->dst_h);
        $maskTransparent = imagecolorallocate($mask, 255, 0, 255);
        imagecolortransparent($mask, $maskTransparent);
        imagefilledellipse($mask, $this->dst_w / 2, $this->dst_h / 2, $this->dst_w, $this->dst_h, $maskTransparent);
        imagecopymerge($this->dst_img, $mask, 0, 0, 0, 0, $this->dst_w, $this->dst_h, 100);

        // Fill each corners of destination image with transparency
        $dstTransparent = imagecolorallocate($this->dst_img, 255, 0, 255);
        imagefill($this->dst_img, 0, 0, $dstTransparent);
        imagefill($this->dst_img, $this->dst_w - 1, 0, $dstTransparent);
        imagefill($this->dst_img, 0, $this->dst_h - 1, $dstTransparent);
        imagefill($this->dst_img, $this->dst_w - 1, $this->dst_h - 1, $dstTransparent);
        imagecolortransparent($this->dst_img, $dstTransparent);

        return $this;
    }

}

$bg = '#EEEEEE';
if (array_key_exists('bg', $_POST))
{
	if (preg_match("|^#[0-9a-fA-F]{6}$|", $_POST['bg']))
	{
		$bg = $_POST['bg'];
	}
}

$url = null;

if (array_key_exists('url', $_GET))
{
	$url = $_GET['url'];
	if (filter_var($url, FILTER_VALIDATE_URL) !== false)
	{
		$img = imagecreatefromjpeg($url);
		$crop = new CircleCrop($img);
		$crop->crop()->display();
	}
	die();
}

if (array_key_exists('url', $_POST))
{
	$url = $_POST['url'];
	if (filter_var($url, FILTER_VALIDATE_URL) !== false)
	{
		$url = $_POST['url'];
	}
}

?>

<html>
<body style="background-color: <?php echo $bg; ?>;">

<form action="test-circle-crop.php" method="post">
	<div>Enter image URL:</div>
	<input style="width:100%" type="text" name="url" value="http://stylonica.com/wp-content/uploads/2014/03/Cute-Dog-Wallpaper.jpg" />
	<br/>
	<div>Enter background color:</div>
	<input style="width:100%" type="text" name="bg" value="#EEEEEE" />
	<br/>
	<input type="submit" value="CircleCrop!" />
</form>

<?php if (!is_null($url)): ?>

	<img src="test-circle-crop.php?url=<?php echo urlencode($url); ?>">

<?php endif ?>

</body>
</html>