Mega Code Archive
Dynapic
<![CDATA[
<?
/*
Documentation (im sorry for my english)
*public properties*
none
*public methods*
DynaPic(string pic, string format) -> class constructor
***parameters
string pic -> full pic name, including the path (absolute or relative)
string format -> the format of the input file, be sure that GDLib handle it!
destroy() -> free the resources
bool create() -> initialize the handling of the pic, thats not required after the constructor
but could be required after some method calls like setPicName($pic), i.e.
setPicName(string pic) -> change the handled pic, the class require a call to create() after this
***parameters
string pic -> full pic name, including the path (absolute or relative)
string getPicName() -> returns the name of the handled pic
setThumbDimension(float pctg) -> initialize the dimensions of the default thumbnail
***parameters
float pctg -> float number (0<pctg<=1) which specifies the resize factor of the default thumb, i.e. pctg=1 means that
the thumb is like the original picture, pctg=0.5 means that the thumb is half of the original, and so on...
getThumbDimension(float &w,float &h) -> return as referenced parameters the default dimension on the thumbnail
setPicFormat(string format) -> set a new output format for the loaded pic, require a call to create() after this
***parameters
string format -> the format of the input file, be sure that GDLib handle it!
string getPicFormat() -> returns the format of the output
thumb() -> output the default thumbnail
full() -> output the original image
view(float width, float height) -> output a thumbnail, the dimension is specified in the parameters of the methodù
***parameters
float width -> width of the output pic
float height -> height of the output pic
*/
class DynaPic
{
var $m_sPicName; //file name with path
var $m_sFormat; //file format, check m_asAllowedFormat
var $m_hPic; //image handle
var $m_bHandled; //flag to check if the pic is well loaded
var $m_nThumbX; //width of the thumbnail
var $m_nThumbY; //height of the thumbnail
//possible pic formats
var $m_asAllowedFormat = array("GIF","PNG","JPEG");
//and related headers
var $m_aHeaders = array("GIF"=>"Content-type: image/gif","PNG"=>"Content-type: image/png","JPEG"=>"Content-type: image/jpeg");
function DynaPic()
{
die("Constructor requires parameters: string pic_path, string ");
}
function DynaPic($pic,$format)
{
$this->m_sFormat = strtoupper($format);
//check if valid format
if(!in_array($this->m_sFormat,$this->m_asAllowedFormat))
{
die("Invalid format: ".stripslashes(htmlentities($this->m_sFormat)));
}
//initialize
$this->m_sPicName=$pic;
//thumb default resize 50%
$this->setThumbDimension(0.5);
if(!$this->create())
die("Unable to create ".stripslashes(htmlentities($this->m_sPicName))." as ".stripslashes(htmlentities($this->m_sFormat)));
}
function destroy()
{
if($this->m_bHandled)
{
imagedestroy($this->m_hPic);
$this->m_bHandled=false;
}
}
function create()
{
$this->destroy();
eval("\$this->m_hPic=@imagecreatefrom".$this->m_sFormat."('".$this->m_sPicName."');");
//check if init succeded
if(!$this->m_hPic)
{
$this->m_bHandled=false;
return false;
}
else
{
$this->m_bHandled=true;
return true;
}
}
function setPicName($pic)
{
$this->m_sPicName=$pic;
$this->m_bHandled=false;
}
function getPicName()
{
return $this->m_sPicName;
}
function setThumbDimension($pctg)
{
if($pctg<=0 || $pctg>1)
die("Not a valid resize factor");
$size = GetImageSize($this->m_sPicName);
$this->m_nThumbX=$size[0]*$pctg;
$this->m_nThumbY=$size[1]*$pctg;
}
function getThumbDimension(&$w,&$h)
{
$w=$this->m_nThumbX;
$h=$this->m_nThumbY;
}
function setPicFormat($format)
{
//check if valid format
if(!in_array($format,$this->m_asAllowedFormat))
{
die("Invalid format: ".stripslashes(htmlentities($this->m_sFormat)));
}
else
{
$this->m_sFormat=strtoupper($format);
$this->m_bHandled=false;
}
}
function getPicFormat()
{
return $this->m_sFormat;
}
//display functions
function thumb()
{
if($this->m_bHandled)
{
$size = GetImageSize($this->m_sPicName);
$picTmp=imagecreate($this->m_nThumbX,$this->m_nThumbY);
imagecopyresized($picTmp, $this->m_hPic, 0, 0, 0, 0, $this->m_nThumbX, $this->m_nThumbY, $size[0], $size[1]);
header($this->m_aHeaders[$this->m_sFormat]);
switch($this->m_sFormat)
{
case 'JPEG':
imagejpeg($picTmp);
break;
case 'GIF':
imagegif($picTmp);
break;
case 'PNG':
imagepng($picTmp);
break;
}
imagedestroy($picTmp);
}
}
function full()
{
if($this->m_bHandled)
{
header($this->m_aHeaders[$this->m_sFormat]);
switch($this->m_sFormat)
{
case 'JPEG':
imagejpeg($this->m_hPic);
break;
case 'GIF':
imagegif($this->m_hPic);
break;
case 'PNG':
imagepng($this->m_hPic);
break;
}
}
}
function view($width, $height)
{
if($this->m_bHandled)
{
$size = GetImageSize($this->m_sPicName);
$picTmp=imagecreate($width,$height);
imagecopyresized($picTmp, $this->m_hPic, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);
header($this->m_aHeaders[$this->m_sFormat]);
switch($this->m_sFormat)
{
case 'JPEG':
imagejpeg($picTmp);
break;
case 'GIF':
imagegif($picTmp);
break;
case 'PNG':
imagepng($picTmp);
break;
}
imagedestroy($picTmp);
}
}
}
/*
sample use, view folder content in thumbs
<script1.php>
$handle=opendir($dirname);
while ($file = readdir($handle))
{
if($file=='.'||$file=='..' || is_dir($dirname.$file))
continue;
//i suppose that only gif images r in that directory
echo "<img border=\"0\" src=\"thumb.php?pic=".urlencode($dirname.$file)."&zoom=25&ext=gif\"><br>\n";
}
closedir($handle);
<thumb.php>
include("dynapic.class.inc.php");
$hThumb = new DynaPic(urldecode($HTTP_GET_VARS["pic"]),$HTTP_GET_VARS["ext"]);
$hThumb->setThumbDimension($HTTP_GET_VARS["zoom"]/100);
$hThumb->thumb();
$hThumb->destroy();
//*/
?>
]]>