Kod PHP:
<?php
defined('_VALID_MOS') or defined('_JEXEC') or die('Direct Access to this location is not allowed.');
/**
* JTImage
*
* @package JoomlaTune.Framework
* @subpackage Image
* @author Dmitry M. Litvinov
* @copyright 2008 by Dmitry M. Litvinov ([url]http://joomlatune.ru[/url])
* @version $Id$
* @access public
*/
class JTImage
{
var $image = null;
var $imageName = null;
var $imageType = null;
var $contentType = null;
/**
* This method is created by the object of this class, or returns reference on already existing
*
* @param
* @return JTImage $instance
*/
function &getInstance()
{
static $instance;
if (!is_object($instance)) {
$instance = new JTImage();
}
return $instance;
}
/**
* This method is returned by an image
*
* @param
* @return JTImage $image
*/
function createImage( $width = 0, $height = 0 )
{
//SWFSprite //TODO : написать функцию создания изображения с заданным размером и заданного
//формата
}
/**
* This method is returned by an image
*
* @param
* @return JTImage $image
*/
function getImage()
{
return $this->image;
}
/**
* This method set image resource to intrnal image
*
* @param
*/
function setImage($image){
$this->image = $image;
}
/**
* This method returns the width of image
*
* @param void
* @return int
*/
function getWidth()
{
return imagesx($this->image);
}
/**
* This method returns the height of image
*
* @param void
* @return int
*/
function getHeight()
{
return imagesy($this->image);
}
/**
* This method is returned by the type of image, being on the passed way
*
* @param string $fileName
* @return
*/
function getType( $fileName )
{
$reference = array('jpg' => 'jpeg', 'jpeg' => 'jpeg', 'gif' => 'gif', 'png' => 'png');
$extension = pathinfo($fileName);
$extension = strtolower(@$extension['extension']);
if ((!$extension) || (!isset($reference[$extension]))) {
return false;
}
;
return $reference[$extension];
}
/**
* JTImage::getConentType()
*
* @param
* @return string $ctype
*/
function getConentType()
{
switch ($this->imageType) {
case "gif":
$ctype = 'image/gif';
break;
case "png":
$ctype = 'image/png';
break;
case "jpeg":
default:
$ctype = 'image/jpeg';
break;
}
return $ctype;
}
/**
* This method is loaded by an image from a file, being on a transferrable way, in the variable of class
*
* @param string $fileName
* @return boolean
*/
function load( $fileName )
{
$this->imageType = $this->getType($fileName);
$this->contentType = $this->getConentType($this->imageType);
$action = 'imagecreatefrom' . $this->imageType;
if (function_exists($action)) {
//echo $fileName;
$this->imageName = $fileName;
$this->image = $action($this->imageName);
return true;
}
return false;
}
/**
* This method is saved by an image, being in the field of class, in a file with the indicated name.
* The type of the created file will coincide with the type of file from which a load of image was in the field class
*
* @param string $fileName
* @return void
*/
function save( $fileName = '' )
{
if (isset($this->imageType) && isset($this->image)) {
$action = 'image' . $this->imageType;
if ($fileName != '') {
$action($this->image, $fileName);
} else {
$action($this->image, $this->imageName);
}
}
}
/**
* This method is shown by an image being in the field of class
*
* @return void
*/
function display()
{
$action = 'imagecreatefrom' . $this->imageType;
if (function_exists($action)) {
$image = $action($this->image);
}
header("Content-type: " . $this->contentType);
switch ($this->imageType) {
case "gif":
imagegif($this->image, '');
break;
case "png":
imagepng($this->image, '', 75, 0);
break;
case "jpeg":
default:
imagejpeg($this->image, '', 75);
break;
}
imagedestroy($image);
die();
}
/**
* This method applies to the image, to contained in the field of class, a filter
* is characterized transferrable a method by a parameter
*
* @param mixed $filter
* @return boolean
*/
function filter( $filter )
{
if (is_a($filter, 'JTImageFilter')) {
$filter->apply($this->image);
}
}
/**
* This method is changed by the size of image, being in the field of class, to the sizes, indicated as transferrable parameters
*
* @param integer $width
* @param integer $height
* @return void
*/
function resize( $width = 0, $height = 0, $dimension = 0 )
{
if ($this->image != null) {
$image_width = imagesx($this->image);
$image_height = imagesy($this->image);
if (($image_width > $dimension) || ($image_height > $dimension)) {
$xratio = $image_width / $dimension;
$yratio = $image_height / $dimension;
$ratio = max($xratio, $yratio);
$thumbnail_width = ceil($image_width / $ratio);
$thumbnail_height = ceil($image_height / $ratio);
$thumbnail = imagecreatetruecolor($thumbnail_width, $thumbnail_height);
@imagecolortransparent($thumbnail, 0);
@imagealphablending($thumbnail, false);
if (function_exists("imagecopyresampled")) {
if (!@imagecopyresampled($thumbnail, $this->image, 0, 0, 0, 0, $thumbnail_width, $thumbnail_height, $image_width, $image_height)) {
imagecopyresized($thumbnail, $this->image, 0, 0, 0, 0, $thumbnail_width, $thumbnail_height, $image_width, $image_height);
}
} else {
imagecopyresized($thumbnail, $this->image, 0, 0, 0, 0, $thumbnail_width, $thumbnail_height, $image_width, $image_height);
}
} else {
$thumbnail = imagecreatetruecolor($image_width, $image_height);
@imagecolortransparent($thumbnail, 0);
@imagealphablending($thumbnail, false);
@imagecopy($thumbnail, $this->image, 0, 0, 0, 0, $image_width, $image_height);
}
$this->image = $thumbnail;
} else {
echo "File was not load. Resize file after loading";
}
}
/**
* This method cuts out from an image, contained in the field of class, part of the set width and height since the set co-ordinates
* and writes down the got image in the field of class
*
* @param integer $width
* @param integer $height
* @param integer $x
* @param integer $y
* @return boolean
*/
function clip( $width, $height, $x = 0, $y = 0 )
{
if ($this->image != null) {
$clip = imagecreatetruecolor($width, $height);
@imagecolortransparent($clip, 0);
@imagealphablending($clip, false);
imagecopymerge($clip, $this->image, 0, 0, $x, $y, $width, $height, 100);
$this->image = $clip;
return true;
} else {
echo "File was not load. Clip file afte loading";
return false;
}
}
function toAspect( $width, $height )
{
if ($this->image != null) {
$image_width = imagesx($this->image);
$image_height = imagesy($this->image);
$ratio = $width / $height;
$image_ratio = $image_width / $image_height;
$semiresult = $ratio / $image_ratio;
//echo $ratio.' -- '.$semiresult . '<br />';
if ($ratio < 1) {
if ($semiresult < 1) {
$result_height = $image_height;
$result_width = $image_height * $width / $height;
} else {
$result_height = $image_height;
$result_width = $image_height / $height * $width;
}
} else {
if ($semiresult < 1) {
$result_height = $image_height;
$result_width = ($image_height / $height) * $width;
} else {
$result_width = $image_width;
$result_height = ($image_width / $width) * $height;
}
}
$this->clip($result_width,$result_height,0,0);
return true;
} else {
echo "File was not load. Aspected file after loading";
return false;
}
}
}
?>
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