Image watermarking with image overlay support

Currently there is no support for image watermarking with image overlay in image manipulation class. Text overlay is not enough to cover most of the image watermarking needs.

CI has not special methods for working with watermark  "on the box". But i created self library which works with images and also can create watermarks. For example this is bit of code of a library method for creating watermarks. You can use this code on your project.

PHP Code:

public function watermarkImage( string $file, array $config = [])
    {
        if ($this->_checkFileExists($file, false) && !empty($config))
        {
            if ($this->_checkFileExists($config['wm_image'], false))
            {
                $file = FCPATH . $file;

                $fileType = pathinfo($file,PATHINFO_EXTENSION);

                switch($fileType)
                {
                    case 'png':

                        $img = imagecreatefrompng($file);

                        break;

                    case 'jpg':
                    case 'jpeg':
                    default:

                        $img = imagecreatefromjpeg($file);

                        break;
                }

                $watermark = imagecreatefrompng($config['wm_image']);

                imagealphablending($watermark, false);

                imagesavealpha($watermark, true);

                $img_w = imagesx($img);

                $img_h = imagesy($img);

                $wtrmrk_w = imagesx($watermark);

                $wtrmrk_h = imagesy($watermark);

                $dst_x = ($img_w / 2) - ($wtrmrk_w / 2); // For centering the watermark on any image

                $dst_y = ($img_h / 2) - ($wtrmrk_h / 2); // For centering the watermark on any image

                imagecopy($img, $watermark, $dst_x, $dst_y, 0, 0, $wtrmrk_w, $wtrmrk_h);

                imagejpeg($img, $file, $config['wm_quality'] ?? 90);

                imagedestroy($img);

                imagedestroy($watermark);
            }
        }
    }