<?php
/**
* class Image2Thumbnail
* Thumbnail creation with PHP4 and GDLib 2.0.1 !
*
*
* @author Andreas Martens <heyn@plautdietsch.de>
* @author Patrick Teague <webdude@veslach.com>
* @version 1.0a
* @date modified 03/13/2003
* @modifications - 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;
/**
* 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 $ne
wysize
* @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)
{
global $HTTP_POST_VARS, $HTTP_GET_VARS, $HTTP_COOKIE_VARS;
if (isset($HTTP_COOKIE_VARS)) $httpvars = $HTTP_COOKIE_VARS;
else if (isset($HTTP_POST_VARS)) $httpvars = $HTTP_POST_VARS;
else if (isset($HTTP_GET_VARS)) $httpvars = $HTTP_GET_VARS;
// New modification - checks color int to be sure within range
if($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,$fileout);
}
/**
*
* private function - do not call
*
*/
function NewImgCreate($filename,$newxsize,$newysize,$fileout)
{
$type = $this->GetImgType($filename);
/* Original code removed in favor of 'switch' statement
if ($type=="png")
{
$orig_img = imagecreatefrompng($filename);
}
if ($type=="jpg")
{
$orig_img = imagecreatefromjpeg($filename);
}
*/
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);
break;
}
else
{
print( "sorry, this server doesn't support <b>imagecreatefromgif()</b>" ); break;
}
case "jpg":
$orig_img = imagecreatefromjpeg($filename);
break;
case "png":
$orig_img = imagecreatefrompng($filename);
break;
}
$new_img =$this->NewImgResize($orig_img,$newxsize,$newysize,$filename);
{
$this-> NewImgSave($new_img,$fileout,$type);
}
else
{
$this->NewImgShow($new_img,$type);
}
ImageDestroy($new_img);
ImageDestroy($orig_img);
}
/**
*
* private function - do not call
* includes function ImageCreateTrueColor and ImageCopyResampled which are availabl
e only under GD 2.0.1 or higher !
*/
function NewImgResize($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
$maxX = $newxsize;
$maxY = $newysize;
if ($orig_size[0]<$orig_size[1])
{
$newxsize = $newysize * ($orig_size[0]/$orig_size[1]);
$adjustX = ($maxX - $newxsize)/2;
$adjustY = 0;
}
else
{
$newysize = $newxsize / ($orig_size[0]/$orig_size[1]);
$adjustX = 0;
$adjustY = ($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 )
{
$im_out = ImageCreateTrueColor($maxX,$maxY);
$bgfill = imagecolorallocate( $im_out, $this->bg_red, $this->bg_green, $this->bg_blue );
imagefill( $im_out, 0,0, $bgfill );
ImageCopyResampled($im_out, $orig_img, $adjustX, $adjustY, 0, 0,
$newxsize, $newysize,$orig_size[0], $orig_size[1]);
}
// Need to image fill just in case image is transparent, don't always want black background
else
{
$im_out = ImageCreateTrueColor($newxsize,$newysize);
$bgfill = imagecolorallocate( $im_out, $this->bg_red, $this->bg_green, $this->bg_blue );
imagefill( $im_out, 0,0, $bgfill );
ImageCopyResampled($im_out, $orig_img, 0, 0, 0, 0,
$newxsize, $newysize,$orig_size[0], $orig_size[1]);
}
return $im_out;
}
/**
*
* private function - do not call
*
*/
function NewImgSave($new_img,$fileout,$type)
{
/* Original code removed in favor of 'switch' statement
if ($type=="png")
{
if (substr($fileout,strlen($fileout)-4,4)!=".png")
$fileout .= ".png";
return imagepng($new_img,$fileout);
}
if ($type=="jpg")
{
if (substr($fileout,strlen($fileout)-4,4)!=".jpg")
$fileout .= ".jpg";
return imagejpeg($new_img,$fileout);
}
*/
switch($type)
{
case "gif":
if( function_exists("imagegif") )
{
$fileout .= ".gif";
return imagegif($new_img,$fileout);
break;
}
else
$this->NewImgSave( $new_img, $fileout, "jpg" );
case "jpg":
$fileout .= ".jpg";
return imagejpeg($new_img,$fileout);
break;
case "png":
$fileout .= ".png";
return imagepng($new_img,$fileout);
break;
}
}
/**
*
* private function - do not call
*
*/
function NewImgShow($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;
}
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($new_img);
break;
}
}
/**
*
* private function - do not call
*
* 1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF,
* 5 = PSD, 6 = BMP,
* 7 = TIFF(intel byte order),
* 8 = TIFF(motorola byte order),
* 9 = JPC, 10 = JP2, 11 = JPX,
* 12 = JB2, 13 = SWC, 14 = IFF
*/
function GetImgType($filename)
{
/* Original code removed in favor of 'switch' statement
if($size[2]==2)
return "jpg";
elseif($size[2]==3)
return "png";
*/
switch($size[2])
{
case 1:
return "gif";
break;
case 2:
return "jpg";
break;
case 3:
return "png";
break;
}
}
}
?>
Image2Thumbnail + watermark, Jak dodac do tej klasy?
15.03.2007, 10:08:40
