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<?php
/**
* Smart, easy and simple Image Manipulation
*
* @author Alessandro Coscia, Milano, Italy, php_staff@yahoo.it
* http://www.codicefacile.it/smartimage
* @copyright LGPL
* @version 0.9.6
*
*/
class SmartImage {
/**
* Source file (path)
*/
private $src;
/**
* GD image's identifier
*/
private $gdID;
/**
* Image info
*/
private $info;
/**
* Initialize image
*
* @param string $src
* @param boolean $big
* @return SmartImage
*/
public function SmartImage($src, $bigImageSize=false) {
// In case of very big images (more than 1Mb)
if ($bigImageSize)
$this->setMemoryForBigImage($src);
// set data
$this->src = $src;
$this->info = getimagesize($src);
// open file
if ( $this->info[2] == 2 ) $this->gdID = imagecreatefromjpeg($this->src);
elseif ( $this->info[2] == 1 ) $this->gdID = imagecreatefromgif($this->src);
elseif ( $this->info[2] == 3 ) $this->gdID = imagecreatefrompng($this->src);
}
/**
* Set memory in case of very big images (more than 1Mb)
* new SmartImage($src, true) to activate this function
* Works with (PHP 4 >= 4.3.2, PHP 5) if compiled with --enable-memory-limit
* or PHP>=5.2.1
* Thanks to Andrvm and to Bascunan for this feature
*/
private function setMemoryForBigImage($filename) {
$imageInfo = getimagesize($filename);
$memoryNeeded = round(($imageInfo[0] * $imageInfo[1] * $imageInfo['bits'] * $imageInfo['channels'] / 8 + Pow(2, 16)) * 1.65);
$memoryLimit = (int) ini_get('memory_limit')*1048576;
if ((memory_get_usage() + $memoryNeeded) > $memoryLimit) {
ini_set('memory_limit', ceil((memory_get_usage() + $memoryNeeded + $memoryLimit)/1048576).'M');
return (true);
}
else return(false);
}
/**
* Resize an image
*
* @param integer $w
* @param integer $h
* @param boolean $cutImage
* @return boolean Everything is ok?
*/
public function resize($width, $height, $cutImage = false) {
if ($cutImage)
return $this->resizeWithCut($width, $height);
else
return $this->resizeNormal($width, $height);
}
/**
* Resize an image without cutting it, only do resize
* saving proportions and adapt it to the smaller dimension
*
* @param integer $w
* @param integer $h
*/
private function resizeNormal($w, $h) {
// set data
$size = $this->info;
$im = $this->gdID;
$newwidth = $size[0];
$newheight = $size[1];
if( $newwidth > $w ){
$newheight = ($w / $newwidth) * $newheight;
$newwidth = $w;
}
if( $newheight > $h ){
$newwidth = ($h / $newheight) * $newwidth;
$newheight = $h;
}
$new = imagecreatetruecolor($newwidth, $newheight);
$result = imagecopyresampled($new, $im, 0, 0, 0, 0, $newwidth, $newheight, $size[0], $size[1]);
@imagedestroy($im);
$this->gdID = $new;
$this->updateInfo();
return $result;
}
/**
* Resize an image cutting it, do resize
* adapt it resizing and cutting the original image
*
* @param integer $w
* @param integer $h
*/
private function resizeWithCut($w, $h){
// set data
$size = $this->info;
$im = $this->gdID;
if( $size[0]>$w or $size[1]>$h ){
$centerX = $size[0]/2;
$centerY = $size[1]/2;
$propX = $w / $size[0];
$propY = $h / $size[1];
if( $propX < $propY ){
$src_x = $centerX - ($w*(1/$propY)/2);
$src_y = 0;
$src_w = ceil($w * 1/$propY);
$src_h = $size[1];
}
else {
$src_x = 0;
$src_y = $centerY - ($h*(1/$propX)/2);
$src_w = $size[0];
$src_h = ceil($h * 1/$propX);
}
// Resize
$new = imagecreatetruecolor($w, $h);
$result = imagecopyresampled($new, $im, 0, 0, $src_x, $src_y, $w, $h, $src_w, $src_h);
@imagedestroy($im);
}
else{
$new = $im;
}
$this->gdID = $new;
$this->updateInfo();
return $result;
}
/**
* Add a Water Mark to the image
* (filigrana)
*
* @param string $from
* @param string $waterMark
*/
public function addWaterMarkImage($waterMark, $opacity = 35, $x = 5, $y = 5){
// set data
$size = $this->info;
$im = $this->gdID;
// set WaterMark's data
$waterMarkSM = new SmartImage($waterMark);
$imWM = $waterMarkSM->getGDid();
// Add it!
// In png watermark images we ignore the opacity (you have to set it in the watermark image)
if ($waterMarkSM->info[2] == 3)
imageCopy($im, $imWM, $x, $y, 0, 0, imagesx($imWM), imagesy($imWM));
else
imageCopyMerge($im, $imWM, $x, $y, 0, 0, imagesx($imWM), imagesy($imWM), $opacity);
$waterMarkSM->close();
$this->gdID = $im;
}
/**
* Rotate of $degrees
*
* @param integer $degrees
*/
public function rotate($degrees=180) {
$this->gdID = imagerotate($this->gdID, $degrees, 0);
$this->updateInfo();
}
/**
* Show Image
*
* @param integer 0-100 $jpegQuality
*/
public function printImage($jpegQuality = 100) {
$this->outPutImage('', $jpegQuality);
}
/**
* Save the image on filesystem
*
* @param string $destination
* @param integer 0-100 $jpegQuality
*/
public function saveImage($destination, $jpegQuality = 100) {
$this->outPutImage($destination, $jpegQuality);
}
/**
* Output an image
* accessible throught printImage() and saveImage()
*
* @param unknown_type $dest
* @param unknown_type $jpegQuality
*/
private function outPutImage($dest = '', $jpegQuality = 100) {
$size = $this->info;
$im = $this->gdID;
// select mime
if (!empty($dest))
list($size['mime'], $size[2]) = $this->findMime($dest);
// if output set headers
if (empty($dest)) header('Content-Type: ' . $size['mime']);
// output image
if( $size[2] == 2 ) imagejpeg($im, $dest, $jpegQuality);
elseif ( $size[2] == 1 ) imagegif($im, $dest);
elseif ( $size[2] == 3 ) imagepng($im, $dest);
}
/**
* Mime type for a file
*
* @param string $file
* @return string
*/
private function findMime($file) {
$file .= ".";
$bit = explode(".", $file);
$ext = $bit[count($bit)-2];
if ($ext == 'jpg') return array('image/jpeg', 2);
elseif ($ext == 'jpeg') return array('image/jpeg', 2);
elseif ($ext == 'gif') return array('image/gif', 1);
elseif ($ext == 'png') return array('image/png', 3);
else return array('image/jpeg', 2);
}
/**
* Get the GD identifier
*
* @return GD Identifier
*/
public function getGDid() {
return $this->gdID;
}
/**
* Get actual Image Size
*
* @return array('x' = integer, 'y' = integer)
*/
public function getSize() {
$size = $this->info;
return array('x' => $size[0], 'y' => $size[1]);
}
/**
* Set GD identifier
*
* @param GD Identifier $value
*/
public function setGDid($value) {
$this->gdID = $value;
}
/**
* Free memory
*/
public function close() {
@imagedestroy($this->gdID);
}
/**
* Update info class's variable
*/
private function updateInfo() {
$info = $this->info;
$im = $this->gdID;
$info[0] = imagesx($im);
$info[1] = imagesy($im);
$this->info = $info;
}
}
?>
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