How do I show to images?

Fatal error: Uncaught Error: Call to undefined function imagecreatefrompng() in C:\XAMMP\htdocs\project\admin\functions.inc.php:242 Stack trace: #0 C:\XAMMP\htdocs\project\admin\manage_banner.php(57): imageCompress('C:\\XAMMP\\tmp\\ph...', 'C:/XAMMP/htdocs...') #1 {main} thrown in C:\XAMMP\htdocs\project\admin\functions.inc.php on line 242

////// This functions ////

function imageCompress($source,$path,$quality=60){
$arr=getimagesize($source);
if($arr['mime']=="image/png"){
$i=imagecreatefrompng($source);
}else{
$i=imagecreatefromjpeg($source);
}
imagejpeg($i,$path,$quality);
}



///// This code of banner //
$msg="";

if($msg==''){
if(isset($_GET['id']) && $_GET['id']!=''){
if($_FILES['image']['name']!=''){
$image=rand(111111111,999999999).'_'.$_FILES['image']['name'];
//move_uploaded_file($_FILES['image']['tmp_name'],BANNER_SERVER_PATH.$image);
imageCompress($_FILES['image']['tmp_name'],BANNER_SERVER_PATH.$image);
mysqli_query($con,"update banner set heading1='$heading1',heading2='$heading2',btn_txt='$btn_txt',btn_link='$btn_link',image='$image',order_no='$order_no' where id='$id'");
}else{
mysqli_query($con,"update banner set heading1='$heading1',heading2='$heading2',btn_txt='$btn_txt',btn_link='$btn_link',order_no='$order_no' where id='$id'");
}