image watermarker is an advanced advanced object oriented watermarker for php developers. it supports both way watermarking like text watermakring and image watermarking. beside these you have full control over watermarking process. version 2.00 supports only text watermarking and released under lesser gnu general public license. version 3.00 supports much more. this is version 3.00. you will get a fully commented source code of this class. usage file is included.
Features
» text watermarking
» text antialiasing
» text shadowing
» text rotaion
» watermark transparency
» any ttf font support
» any font size
» customizable horizontal and vertical spacing between two successive watermark
» using any image as watermark (v 3.00 only)
» transparency of image that used as watermark (v 3.00 only)
» transparent gif and png support (v 3.00 only)
» commented source code (v 3.00 only)
***** BEGIN imageMarker.php *****
<?
/********************************************************************************************************
* class name : watermarker
* developed by : hasin hayder
* version : 2.00
* date : 050509 10PM (9th may, 2005 , 10 PM)
* dependency : gd library and freetype
* homepage : http://hasin.phpxperts.com
*********************************************************************************************************
* version : 3.00
* date : 050512, 12:25 PM
* added : another image as water mark
* added : transparency of watermark image
* added : setting a specific color in watermark image fully transparent for specially transparen png or gif
* homepage : http://hasin.phpxperts.com
********************************************************************************************************/
class waterMarker
{
var $imagePath; //valid absolute path to image file
var $waterMarkText = "copyrighted"; //the text to draw as watermark
var $signature = "version 1.0"; //just the class file signature
var $font = "arial.ttf"; //font file to use for drawing text. need absolute path
var $size = 10; //font size
var $angle = 45; //angle to draw watermark text
var $hSpacing = 120; //horizontal spacing betweeen two sucessive watermark text
var $vSpacing = 120; //vertical spacing betweeen two sucessive watermark text
var $imageResource; //to store the image resource after completion of watermarking
var $imageType="jpg"; //image type of main image, this could be either of png, jpg, jpeg, bmp, or gif (if gif then output will be in png)
var $wmimageType="jpg"; //image type or watermark image, this could be either of png, jpg, jpeg, bmp, or gif
var $shadow = false; //if set to true then a shadow will be drawn under every watermark text
var $antialiased = true; //if set to true then watermark text will be drwan anti aliased. this is recommended
var $wmImagePath = ""; //the path of the image to watermark
var $drawMode = 0; //two mode is supported, 0 for text watermark, 1 for image watermark
var $transparency = 0;//transparency level
var $enableFullTransparency = false; //if this enabled, watermarkImages (fullTransparenColorAtX, fullTransparenColorAtY) pixels color will be fully transparent.
var $fullTransparentColorAtX = 0; //this (x) points color will be made full transparent
var $fullTransparentColorAtY = 0; //this (y) points color will be made full transparent
function __processImage($__imageType, $__mode)
/*********************************************************************************************
* private function for returning generalized image create and deploy proc's, dont use directly
* params : $__mode is the mode of operation
* $__mode should be 0 for image create proc
* $__mode should be 1 for image deploy proc
* $__imageType is the image type for these procs, could be jpg, jpeg, bmp, png or gif
* return value : variable function for creating and deplying images
**********************************************************************************************/
{
switch ($__imageType)
{
/************************************************************************
* this portion uses PHP's advanced variable function facility
* and determine generalized function to create and deply images.
* $createProc is a generalized reference of image creation function
* $outputProc is a generalized reference of image deploying functionm
************************************************************************/
case "png":
$createProc = "imagecreatefrompng";
$outputProc = "imagepng";
break;
case "gif";
$createProc = "imagecreatefromgif";
$outputProc = "imagepng";
break;
case "bmp";
$createProc = "imagecreatefrombmp";
$outputProc = "imagebmp";
break;
case "jpeg":
case "jpg":
$createProc = "imagecreatefromjpeg";
$outputProc = "imagejpeg";
break;
}
switch ($__mode)
//now handle the mode of operation
{
case 0:
return $createProc;
break;
case 1:
return $outputProc;
break;
}
}
function mark()
{
/****************************************************************
* this function draw the watermark over the image
* parameteres : none
* return value : image resource after completion of watermarking
****************************************************************/
list($width, $height, $type, $attr) = getimagesize($this->imagePath); //get basic properties of the image file
/************************************************************************
* initialize main create and deploy procedures
************************************************************************/
$__mainImageCreateProc =$this->__processImage($this->imageType, 0);
$__mainImageDeployProc =$this->__processImage($this->imageType, 1);
/**************************************************************************
* initialize watermark imnage create and deploy procedures if drawMode = 1
**************************************************************************/
if ($this->drawMode==1)
{
$__wmImageCreateProc =$this->__processImage($this->wmimageType, 0);
$__wmImageDeployProc =$this->__processImage($this->wmimageType, 1);
$wm = $__wmImageCreateProc($this->wmimagePath); //open the watermark image with generalized create function
list($wmwidth, $wmheight, $wmtype, $wmattr) = getimagesize($this->wmimagePath); //get basic properties of the image file
}
$im = $__mainImageCreateProc($this->imagePath); //open the image with generalized create function
$grey = imagecolorallocate($im, 180, 180, 180); //color for watermark text
$shadowColor = imagecolorallocate($im, 130, 130, 130); //color for shadow text
if (!$this->antialiased)
/******************************************************************************
* if its need to draw non-antialiased text then just set the color = -1*color
* then the text drawn with this color will be sharp (non-antialiased)
******************************************************************************/
{
$grey *= -1; //grey = grey * -1
$shadowColor *= -1; //shadowColor = shadowColor * -1
}
if($this->drawMode==0)
{
//start drawing watermark text
for ($x=20; $x<$width; $x+=$this->hSpacing)
/*******************************************
* now draw water mark text and shadow text
*******************************************/
{
for ($y=20; $y<$height; $y+=$this->vSpacing)
{
if ($this->shadow) imagettftext($im, $this->size, $this->angle, $x+1, $y+1, $shadowColor, $this->font, $this->waterMarkText); //draw shadow text over image
imagettftext($im, $this->size, $this->angle, $x, $y, $grey, $this->font, $this->waterMarkText); //draw text over image
}
}
$this->imageResource= $__mainImageDeployProc($im); //deploy the image with generalized deploy function
}
if($this->drawMode==1)
{
/******************************************************************************************************
* this portion sets color of pixel (fullTransparenColorAtX,fullTransparenColorAtY) as transparent color
******************************************************************************************************/
if($this->enableFullTransparency==true)
{
$tpcolor = imagecolorat($wm, $this->fullTransparentColorAtX, $this->fullTransparentColorAtY);
imagecolortransparent($wm, $tpcolor);
}
/*****************************************************************************************************/
//start drawing watermark image
for ($x=20; $x<$width; $x+=$this->hSpacing)
/*******************************************
* now draw water mark image
*******************************************/
{
for ($y=20; $y<$width; $y+=$this->vSpacing)
{
imagecopymerge($im, $wm, $x, $y,0,0,$wmwidth, $wmheight,$this->transparency); //draw waterMark image over main image
}
}
$this->imageResource= $__mainImageDeployProc($im); //deploy the image with generalized deploy function
}
imagedestroy($im);
imagedestroy($wm);
}
}
?>
sample code
<?
/*******************************************
* usage of this waterMark class
*******************************************/
include_once("imageMarker.php");
$imagePath = $_REQUEST['code']; //image to watermark
$imark = new waterMarker(); //initiate
$imark->angle=45; //angle for text marking
$imark->waterMarkText = "phpexperts";
$imark->wmimagePath = "angel.png"; //image to use as watermark
$imark->enableFullTransparency=true; //enable GIF/PNG transparency
$imark->transparency=20; //alpha percentage
$imark->shadow = true; //create shadow
$imark->wmimageType = "png";
$imark->drawMode = 1; //turn on image watermarking
$imark->imagePath = $imagePath;
$imark->font="arial.ttf"; //font file that must be in this dir
$imark->size = 14;
$imark->hSpacing=110; //horizontal spacing
$imark->vSpacing=110; //vertical spacing
header("Content-type: image/jpeg");
$imark->mark(); //draw watermark
?>
