<?php

//image class by Reinis Veips

//requires at least GD2

 
class Image {

var $imageType;

var $imageExtension;

var $imageHandle;

var $originalPath;

var $jpegQuality=100;

function __construct($imgpath=false) {

if ($imgpath) $this->openImage($imgpath);

}

function openImage($imgpath) {

if (!file_exists($imgpath)) throw new Exception('File doesn\'t exist!');

$imageData=getimagesize($imgpath);

if (!$imageData) {

throw new Exception('Unknown image format!');

} else {

$this->imageType=$imageData[2];

switch ($this->imageType) {

case IMAGETYPE_GIF:

$this->imageHandle=imagecreatefromgif($imgpath);

$this->imageExtension='gif';

break;

case IMAGETYPE_PNG:

$this->imageHandle=imagecreatefrompng($imgpath);

$this->imageExtension='png';

break;

case IMAGETYPE_JPEG:

$this->imageHandle=imagecreatefromjpeg($imgpath);

$this->imageExtension='jpeg';

break;

case IMAGETYPE_BMP:

$this->imageHandle=imagecreatefrombmp($imgpath);

$this->imageExtension='bmp';

break;

default: throw new Exception('Unknown image format!');

}

$this->originalPath=$imgpath;

}

}

 
function saveImage($imgpath=false,$type=false) {

if (!$imgpath) $imgpath=$this->originalPath;

if (!$type) {

$ext=strtolower(substr($imgpath, strrpos($imgpath, '.') + 1));

switch ($ext) {

case 'jpeg':

case 'jpg':

$type=IMAGETYPE_JPEG;

break;

case 'bmp':

$type=IMAGETYPE_BMP;

break;

case 'gif':

$type=IMAGETYPE_GIF;

break;

case 'png':

$type=IMAGETYPE_PNG;

default:

$type=IMAGETYPE_JPEG;

}

}

 
switch ($type) {

case IMAGETYPE_JPEG:

return imagejpeg($this->imageHandle,$imgpath,$this->jpegQuality);

break;

case IMAGETYPE_GIF:

return imagegif($this->imageHandle,$imgpath);

break;

case IMAGETYPE_PNG:

return imagepng($this->imageHandle,$imgpath);

break;

case IMAGETYPE_BMP:

return imagebmp($this->imageHandle,$imgpath);

break;

default:

return imagejpeg($this->imageHandle,$imgpath);

}

}

 
function resizeImage($maxwidth,$maxheight,$preserveAspect=true) {

//function resizes an image

//it doesn't enlarge the image

$width=imagesx($this->imageHandle);

$height=imagesy($this->imageHandle);

if ($width>$maxwidth && $height>$maxheight) {

$oldprop=round($width/$height,2);

$newprop=round($maxwidth/$maxheight,2);

$preserveAspectx=round($width/$maxwidth,2);

$preserveAspecty=round($height/$maxheight,2);

 
if ($preserveAspect)

{

if ($preserveAspectx<$preserveAspecty)

{

$newwidth=$width/($height/$maxheight);

$newheight=$maxheight;

}

else 

{

$newwidth=$maxwidth;

$newheight=$height/($width/$maxwidth);

}

 
$dest=imagecreatetruecolor($newwidth,$newheight);

if (imagecopyresampled($dest,$this->imageHandle,0,0,0,0,$newwidth,$newheight,$width,$height)==false) throw new Exception('Couldn\'t resize image!');

}

else

{

$dest=imagecreatetruecolor($maxwidth,$maxheight);

if (imagecopyresampled($dest,$this->imageHandle,0,0,0,0,$maxwidth,$maxheight,$width,$height)==false) throw new Exception('Couldn\'t resize image!') ;

}

$this->imageHandle=$dest;

}

}

 
function outputImage() {

//function outputs all the headers and image data

// var_dump($this);

header('Content-type: '.image_type_to_mime_type($this->imageType));

switch ($this->imageType) {

case IMAGETYPE_GIF:

return imagegif($this->imageHandle);

break;

case IMAGETYPE_JPEG:

return imagejpeg($this->imageHandle,'',$this->jpegQuality);

break;

case IMAGETYPE_BMP:

return imagebmp($this->imageHandle);

break;

case IMAGETYPE_PNG:

return imagepng($this->imageHandle);

break;

}

}

}

 
 
 
/*

ÖRNEK:

try {

$img= new Image('C:\logo4.jpg');

$img->resizeImage(50,30);

$img->outputImage();

} catch ( Exception $e) {

echo $e;

}

*/

?>