CircleCrop.php

<?php
/**
 * Created by PhpStorm.
 * User: kushagra
 * Date: 05/10/17
 * Time: 11:17 PM
 */

namespace App;


class CircleCrop
{
    private $src_img;
    private $src_w;
    private $src_h;
    private $dst_img;
    private $dst_w;
    private $dst_h;

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

    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()
    {
        $this->reset();

        $mask = imagecreatetruecolor($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);

        $dstTransparent = imagecolorallocate($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;
    }
}