fb app system: inc/resize.php

<?php
Class resize
{
private $image;
private $width;
private $height;
private $imageResized;
function __construct($fileName)
{
$this->image = $this->openImage($fileName);
$this->width  = imagesx($this->image);
$this->height = imagesy($this->image);
}
private function openImage($file)
{
$extension = strtolower(strrchr($file,'.'));
switch($extension)
{
case '.jpg':
case '.jpeg':
$img = @imagecreatefromjpeg($file);
break;
case '.gif':
$img = @imagecreatefromgif($file);
break;
case '.png':
$img = @imagecreatefrompng($file);
break;
default:
$img = false;
break;
}
return $img;
}
public function resizeImage($newWidth,$newHeight,$option="auto")
{
$optionArray = $this->getDimensions($newWidth,$newHeight,$option);
$optimalWidth  = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];
$this->imageResized = imagecreatetruecolor($optimalWidth,$optimalHeight);
imagecopyresampled($this->imageResized,$this->image,0,0,0,0,$optimalWidth,$optimalHeight,$this->width,$this->height);
if ($option == 'crop') {
$this->crop($optimalWidth,$optimalHeight,$newWidth,$newHeight);
}
}
private function getDimensions($newWidth,$newHeight,$option)
{
switch ($option)
{
case 'exact':
$optimalWidth = $newWidth;
$optimalHeight= $newHeight;
break;
case 'portrait':
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
break;
case 'landscape':
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
break;
case 'auto':
$optionArray = $this->getSizeByAuto($newWidth,$newHeight);
$optimalWidth = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];
break;
case 'crop':
$optionArray = $this->getOptimalCrop($newWidth,$newHeight);
$optimalWidth = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];
break;
}
return array('optimalWidth'=>$optimalWidth,'optimalHeight'=>$optimalHeight);
}
private function getSizeByFixedHeight($newHeight)
{
$ratio = $this->width / $this->height;
$newWidth = $newHeight * $ratio;
return $newWidth;
}
private function getSizeByFixedWidth($newWidth)
{
$ratio = $this->height / $this->width;
$newHeight = $newWidth * $ratio;
return $newHeight;
}
private function getSizeByAuto($newWidth,$newHeight)
{
if ($this->height <$this->width)
{
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
}
elseif ($this->height >$this->width)
{
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
}
else
{
if ($newHeight <$newWidth) {
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
}else if ($newHeight >$newWidth) {
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
}else {
$optimalWidth = $newWidth;
$optimalHeight= $newHeight;
}
}
return array('optimalWidth'=>$optimalWidth,'optimalHeight'=>$optimalHeight);
}
private function getOptimalCrop($newWidth,$newHeight)
{
$heightRatio = $this->height / $newHeight;
$widthRatio  = $this->width /  $newWidth;
if ($heightRatio <$widthRatio) {
$optimalRatio = $heightRatio;
}else {
$optimalRatio = $widthRatio;
}
// ================================== PAYMENT ====================================//