%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* class Image2Thumbnail
* Thumbnail creation with PHP4 and GDLib (recommended, but not mandatory: 2.0.1 !)
*
*
* @author Andreas Martens <heyn@plautdietsch.de>
* @author Patrick Teague <webdude@veslach.com>
* @author Soeren Eberhardt <soeren|at|virtuemart.net>
*@version 1.0b
*@date modified 11/22/2004
*@modifications
* - added support for GDLib < 2.0.1
* - added support for reading gif images
* - makes jpg thumbnails
* - changed several groups of 'if' statements to single 'switch' statements
* - commented out original code so modification could be identified.
*/
class Img2Thumb {
// New modification
/**
* private variables - do not use
*
* @var int $bg_red 0-255 - red color variable for background filler
* @var int $bg_green 0-255 - green color variable for background filler
* @var int $bg_blue 0-255 - blue color variable for background filler
* @var int $maxSize 0-1 - true/false - should thumbnail be filled to max pixels
*/
var $bg_red;
var $bg_green;
var $bg_blue;
var $maxSize;
/**
* @var string Filename for the thumbnail
*/
var $fileout;
/**
* Constructor - requires following vars:
*
* @param string $filename image path
*
* These are additional vars:
*
* @param int $newxsize new maximum image width
* @param int $newysize new maximum image height
* @param string $fileout output image path
* @param int $thumbMaxSize whether thumbnail should have background fill to make it exactly $newxsize x $newysize
* @param int $bgred 0-255 - red color variable for background filler
* @param int $bggreen 0-255 - green color variable for background filler
* @param int $bgblue 0-255 - blue color variable for background filler
*
*/
function Img2Thumb($filename, $newxsize=60, $newysize=60, $fileout='',
$thumbMaxSize=0, $bgred=0, $bggreen=0, $bgblue=0)
{
//Some big pictures need that
VmConfig::ensureMemoryLimit(128);
// New modification - checks color int to be sure within range
if($thumbMaxSize)
{
$this->maxSize = true;
}
else
{
$this->maxSize = false;
}
if($bgred>=0 || $bgred<=255)
{
$this->bg_red = $bgred;
}
else
{
$this->bg_red = 0;
}
if($bggreen>=0 || $bggreen<=255)
{
$this->bg_green = $bggreen;
}
else
{
$this->bg_green = 0;
}
if($bgblue>=0 || $bgblue<=255)
{
$this->bg_blue = $bgblue;
}
else
{
$this->bg_blue = 0;
}
$this->NewImgCreate($filename,$newxsize,$newysize,$fileout);
}
/**
*
* private function - do not call
*
*/
private function NewImgCreate($filename,$newxsize,$newysize,$fileout)
{
if(function_exists('imagecreatefromstring')){
$content = file_get_contents($filename);
if($content){
$gd = @imagecreatefromstring($content);
if ($gd === false) {
vmWarn('Img2Thumb NewImgCreate with imagecreatefromstring failed '.$filename.' ');
} else {
$pathinfo = pathinfo( $fileout );
$type = empty($type)? $pathinfo['extension']:$type;
$this->fileout = $fileout;
$new_img =$this->NewImgResize($gd,$newxsize,$newysize,$filename);
if (!empty($fileout))
{
$this-> NewImgSave($new_img,$fileout,$type);
}
else
{
$this->NewImgShow($new_img,$type);
}
ImageDestroy($new_img);
ImageDestroy($gd);
}
}
} else {
$type = $this->GetImgType($filename);
$pathinfo = pathinfo( $fileout );
$type = empty($type)? $pathinfo['extension']:$type;
if( empty( $pathinfo['extension'])) {
$fileout .= '.'.$type;
}
$this->fileout = $fileout;
switch($type){
case "gif":
// unfortunately this function does not work on windows
// via the precompiled php installation :(
// it should work on all other systems however.
if( function_exists("imagecreatefromgif") ) {
$orig_img = imagecreatefromgif($filename);
} else {
$app = JFactory::getApplication();
$app->enqueueMessage('This server does NOT suppport auto generating Thumbnails by gif');
return false;
}
break;
case "jpg":
if( function_exists("imagecreatefromjpeg") ) {
if($this->check_jpeg($filename,true)){
$orig_img = imagecreatefromjpeg($filename);
} else {
vmWarn('Img2Thumb NewImgCreate $orig_img empty, type was not in switch for file '.$filename.' this happens due missing exif data or broken origin file');
return false;
}
} else {
$app = JFactory::getApplication();
$app->enqueueMessage('This server does NOT suppport auto generating Thumbnails by jpg');
return false;
}
break;
case "png":
if( function_exists("imagecreatefrompng") ) {
$orig_img = imagecreatefrompng($filename);
} else {
$app = JFactory::getApplication();
$app->enqueueMessage('This server does NOT suppport auto generating Thumbnails by png');
return false;
}
break;
}
if(empty($orig_img)){
vmWarn('Img2Thumb NewImgCreate $orig_img empty, type was not in switch for file '.$filename.' this happens due missing exif data or broken origin file');
return false;
} else {
$new_img =$this->NewImgResize($orig_img,$newxsize,$newysize,$filename);
if (!empty($fileout))
{
$this-> NewImgSave($new_img,$fileout,$type);
}
else
{
$this->NewImgShow($new_img,$type);
}
ImageDestroy($new_img);
ImageDestroy($orig_img);
}
}
}
/**
* check for jpeg file header and footer - also try to fix it
* @author willertan1980 at yahoo dot com http://www.php.net/manual/de/function.imagecreatefromjpeg.php
* @param $f
* @param bool $fix
* @return bool
*/
function check_jpeg($f, $fix=false ){
if ( false !== (@$fd = fopen($f, 'r+b' )) ){
if ( fread($fd,2)==chr(255).chr(216) ){
fseek ( $fd, -2, SEEK_END );
if ( fread($fd,2)==chr(255).chr(217) ){
fclose($fd);
return true;
}else{
if ( $fix && fwrite($fd,chr(255).chr(217)) ){vmdebug('corrected jpg '.$f);return true;}
fclose($fd);
vmInfo('broken jpg, cannot create thumb '.$f);
return false;
}
}else{fclose($fd); return false;}
}else{
vmWarn('check_jpeg could not open file '.$f);
return false;
}
}
/**
/**
* Maybe adding sharpening with
* $sharpenMatrix = array
(
array(-1.2, -1, -1.2),
array(-1, 20, -1),
array(-1.2, -1, -1.2)
);
// calculate the sharpen divisor
$divisor = array_sum(array_map('array_sum', $sharpenMatrix));
$offset = 0;
// apply the matrix
imageconvolution($img, $sharpenMatrix, $divisor, $offset);
*
* private function - do not call
* includes function ImageCreateTrueColor and ImageCopyResampled which are available only under GD 2.0.1 or higher !
*/
private function NewImgResize($orig_img,$newxsize,$newysize,$filename)
{
//getimagesize returns array
// [0] = width in pixels
// [1] = height in pixels
// [2] = type
// [3] = img tag "width=xx height=xx" values
$orig_size = getimagesize($filename);
$newxsize = (int)$newxsize;
$newysize = (int)$newysize;
if(empty($newxsize) and empty($newysize)){
vmWarn('NewImgResize failed x,y = 0','NewImgResize failed x,y = 0');
return false;
} else {
if(empty($newxsize)){
//Recalculate newxsize
$newxsize = $newysize/$orig_size[1] * $orig_size[0];
} else if(empty($newysize)){
$newysize = $newxsize/$orig_size[0] * $orig_size[1];
}
}
$maxX = $newxsize;
$maxY = $newysize;
if ($orig_size[0]<$orig_size[1])
{
$newxsize = (int)$newysize * ($orig_size[0]/$orig_size[1]);
$adjustX = (int)($maxX - $newxsize)/2;
$adjustY = 0;
}
else
{
$newysize = (int) $newxsize / ($orig_size[0]/$orig_size[1]);
$adjustX = 0;
$adjustY = (int)($maxY - $newysize)/2;
}
/* Original code removed to allow for maxSize thumbnails
$im_out = ImageCreateTrueColor($newxsize,$newysize);
ImageCopyResampled($im_out, $orig_img, 0, 0, 0, 0,
$newxsize, $newysize,$orig_size[0], $orig_size[1]);
*/
// New modification - creates new image at maxSize
if( $this->maxSize )
{
if( function_exists("imagecreatetruecolor") )
$im_out = imagecreatetruecolor($maxX,$maxY);
else
$im_out = imagecreate($maxX,$maxY);
// Need to image fill just in case image is transparent, don't always want black background
$bgfill = imagecolorallocate( $im_out, $this->bg_red, $this->bg_green, $this->bg_blue );
if( function_exists( "imageAntiAlias" )) {
imageAntiAlias($im_out,true);
}
imagealphablending($im_out, false);
if( function_exists( "imagesavealpha")) {
imagesavealpha($im_out,true);
}
if( function_exists( "imagecolorallocatealpha")) {
$transparent = imagecolorallocatealpha($im_out, 255, 255, 255, 127);
}
//imagefill( $im_out, 0,0, $bgfill );
if( function_exists("imagecopyresampled") ){
ImageCopyResampled($im_out, $orig_img, $adjustX, $adjustY, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);
}
else {
ImageCopyResized($im_out, $orig_img, $adjustX, $adjustY, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);
}
}
else
{
if( function_exists("imagecreatetruecolor") )
$im_out = ImageCreateTrueColor($newxsize,$newysize);
else
$im_out = imagecreate($newxsize,$newysize);
if( function_exists( "imageAntiAlias" ))
imageAntiAlias($im_out,true);
imagealphablending($im_out, false);
if( function_exists( "imagesavealpha"))
imagesavealpha($im_out,true);
if( function_exists( "imagecolorallocatealpha"))
$transparent = imagecolorallocatealpha($im_out, 255, 255, 255, 127);
if( function_exists("imagecopyresampled") )
ImageCopyResampled($im_out, $orig_img, 0, 0, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);
else
ImageCopyResized($im_out, $orig_img, 0, 0, 0, 0, $newxsize, $newysize,$orig_size[0], $orig_size[1]);
}
return $im_out;
}
/**
*
* private function - do not call
*
*/
private function NewImgSave($new_img,$fileout,$type)
{
if( !@is_dir( dirname($fileout))) {
@mkdir( dirname($fileout) );
}
switch($type)
{
case "gif":
if( !function_exists("imagegif") )
{
if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".gif") {
$fileout .= ".png";
}
return imagepng($new_img,$fileout);
}
else {
if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".gif") {
$fileout .= '.gif';
}
return imagegif( $new_img, $fileout );
}
break;
case "jpg":
if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".jpg")
$fileout .= ".jpg";
$quality = VmConfig::get('img_quality', 89);
return imagejpeg($new_img, $fileout, $quality);
break;
case "png":
if (strtolower(substr($fileout,strlen($fileout)-4,4))!=".png")
$fileout .= ".png";
return imagepng($new_img,$fileout);
break;
}
}
/**
*
* private function - do not call
*
*/
private function NewImgShow($new_img,$type)
{
/* Original code removed in favor of 'switch' statement
if ($type=="png")
{
header ("Content-type: image/png");
return imagepng($new_img);
}
if ($type=="jpg")
{
header ("Content-type: image/jpeg");
return imagejpeg($new_img);
}
*/
switch($type)
{
case "gif":
if( function_exists("imagegif") )
{
header ("Content-type: image/gif");
return imagegif($new_img);
break;
}
//either there is missing a break or the else $this->NewImgShow is unecessary
else
$this->NewImgShow( $new_img, "jpg" );
case "jpg":
header ("Content-type: image/jpeg");
return imagejpeg($new_img);
break;
case "png":
header ("Content-type: image/png");
return imagepng($new_img);
break;
}
}
/**
*
* private function - do not call
*
* 1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF,
* 5 = PSD, 6 = BMP,
* 7 = TIFF(intel byte order),
* 8 = TIFF(motorola byte order),
* 9 = JPC, 10 = JP2, 11 = JPX,
* 12 = JB2, 13 = SWC, 14 = IFF
*/
private function GetImgType($filename)
{
$info = getimagesize($filename);
/* Original code removed in favor of 'switch' statement
if($size[2]==2)
return "jpg";
elseif($size[2]==3)
return "png";
*/
switch($info[2]) {
case 1:
return "gif";
break;
case 2:
return "jpg";
break;
case 3:
return "png";
break;
default:
return false;
}
}
}
Zerion Mini Shell 1.0