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<?php
/*
* Class Watermark
* require GD librabry
*
*
*/
class Watermark {
/**
*
* @var image resource
*/
private $image = null;
/**
*
* @var image resource
*/
private $watermark = null;
/**
*
* @var string
*/
private $output_file = null;
/**
*
* @var int
*/
private $type = '';
const BOTTOM_RIGHT = 1;
const CENTER = 2;
const BOTTOM_RIGHT_SMALL = 3;
const TOP_RIGHT=4;
const TOP_LEFT=5;
const BOTTOM_LEFT=6;
/**
*
* @param string $path_to_image
*/
public function __construct($path_to_image){
if (file_exists($path_to_image)){
$this->image = $path_to_image;
}
$this->type = Watermark::BOTTOM_RIGHT;
}
/**
*
* @param string $path_to_watermark
* @return boolean
*/
public function setWatermarkImage($path_to_watermark){
if (file_exists($path_to_watermark) && preg_match('/\.png$/i',$path_to_watermark)){
$this->watermark = $path_to_watermark;
return true;
}
return false;
}
/**
*
* @return boolean
*/
public function save(){
$this->output_file = $this->image;
return $this->process();
}
/**
*
* @param string $path_to_image
* @return boolean
*/
public function saveAs($path_to_image){
$this->output_file = $path_to_image;
return $this->process();
}
/**
*
* @param int $type
*/
public function setType($type){
$this->type = $type;
}
/**
*
* @return boolean
*/
private function process(){
$watermark = imagecreatefrompng($this->watermark);
if ($watermark){
$image = imagecreatefromjpeg($this->image);
if ($image){
switch ($this->type){
case Watermark::BOTTOM_RIGHT:
return $this->watermark_bottom_right($image, $watermark);
break;
case Watermark::CENTER:
return $this->watermark_center($image, $watermark);
break;
case Watermark::BOTTOM_RIGHT_SMALL:
return $this->watermark_bottom_right_small($image, $watermark);
break;
case Watermark::TOP_RIGHT:
return $this->watermark_top_right($image, $watermark);
break;
case Watermark::TOP_LEFT:
return $this->watermark_top_left($image, $watermark);
break;
case Watermark::BOTTOM_LEFT:
return $this->watermark_bottom_left($image, $watermark);
break;
}
return true;
}else{
return false;
}
}else {
return false;
}
}
/**
*
* @param image resource $image
* @param image resource $watermark
* @return boolean
*/
private function watermark_bottom_right(&$image, &$watermark){
$watermark_width = imagesx($watermark);
$watermark_height = imagesy($watermark);
$size = getimagesize($this->image);
$dest_x = $size[0] - $watermark_width - 5;
$dest_y = $size[1] - $watermark_height - 5;
imagecopy($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height);
//top right
/*imagecopy($image, $watermark, $dest_x, 0, 0, 0, $watermark_width, $watermark_height);*/
imagejpeg($image,$this->output_file,100);
imagedestroy($image);
imagedestroy($watermark);
return true;
}
private function watermark_top_right(&$image, &$watermark){
$watermark_width = imagesx($watermark);
$watermark_height = imagesy($watermark);
$size = getimagesize($this->image);
$dest_x = $size[0] - $watermark_width - 5;
$dest_y = $size[1] - $watermark_height - 5;
//top right
imagecopy($image, $watermark, $dest_x, 0, 0, 0, $watermark_width, $watermark_height);
imagejpeg($image,$this->output_file,100);
imagedestroy($image);
imagedestroy($watermark);
return true;
}
private function watermark_top_left(&$image, &$watermark){
$watermark_width = imagesx($watermark);
$watermark_height = imagesy($watermark);
$size = getimagesize($this->image);
$dest_x = $size[0] - $watermark_width - 5;
$dest_y = $size[1] - $watermark_height - 5;
//top left
imagecopy($image, $watermark, 0, 0, 0, 0, $watermark_width, $watermark_height);
imagejpeg($image,$this->output_file,100);
imagedestroy($image);
imagedestroy($watermark);
return true;
}
private function watermark_bottom_left(&$image, &$watermark){
$watermark_width = imagesx($watermark);
$watermark_height = imagesy($watermark);
$size = getimagesize($this->image);
$dest_x = $size[0] - $watermark_width - 5;
$dest_y = $size[1] - $watermark_height - 5;
//top left
imagecopy($image, $watermark, 0, $dest_y, 0, 0, $watermark_width, $watermark_height);
imagejpeg($image,$this->output_file,100);
imagedestroy($image);
imagedestroy($watermark);
return true;
}
/**
*
* @param image resource $image
* @param image resource $watermark
* @return booelan
*/
private function watermark_center(&$image, &$watermark){
$size = getimagesize($this->image);
$watermark_x = imagesx($watermark);
$watermark_y = imagesy($watermark);
$im_x = $size[0];
$im_y = $size[1];
$cof = $im_x/($watermark_x*1.3); // 5/1 = im_x/(wx*cof) ; wx*cof = im_x/5 ; cof = im_x/wx*5
$w = intval($watermark_x*$cof);
$h = intval($watermark_y*$cof);
$watermark_mini = ImageCreateTrueColor($w, $h);
imagealphablending($watermark_mini, false);
imagesavealpha($watermark_mini,true);
ImageCopyResampled ($watermark_mini, $watermark, 0, 0, 0, 0, $w, $h, $watermark_x, $watermark_y);
$dest_x = $im_x - $w - (($im_x-$w)/2);
$dest_y = $im_y - $h - (($im_y-$h)/2);
imagecopy($image, $watermark_mini, $dest_x, $dest_y, 0, 0, $w, $h);
imagejpeg($image,$this->output_file,100);
imagedestroy($image);
imagedestroy($watermark);
return true;
}
/**
*
* @param image resource $image
* @param image resource $watermark
* @return boolean
*/
private function watermark_bottom_right_small(&$image, &$watermark){
$size = getimagesize($this->image);
$orig_watermark_x = imagesx($watermark);
$orig_watermark_y = imagesy($watermark);
$im_x = $size[0];
$im_y = $size[1];
$cof = $im_x/($orig_watermark_x*5); // 5/1 = im_x/(wx*cof) ; wx*cof = im_x/5 ; cof = im_x/wx*5
$w = intval($orig_watermark_x*$cof);
$h = intval($orig_watermark_y*$cof);
$watermark_mini = ImageCreateTrueColor($w, $h);
imagealphablending($watermark_mini, false);
imagesavealpha($watermark_mini,true);
ImageCopyResampled ($watermark_mini, $watermark, 0, 0, 0, 0, $w, $h, $orig_watermark_x, $orig_watermark_y);
//
$dest_x = $size[0] - $w - 5;
$dest_y = $size[1] - $h -5;
imagecopy($image, $watermark_mini, $dest_x,$dest_y , 0, 0, $w, $h);
imagejpeg($image,$this->output_file,100);
imagedestroy($image);
imagedestroy($watermark);
imagedestroy($watermark_mini);
return true;
}
}
?>