center watermark

[Aruffell]

I currently have a watermark on my website for any images over a certain dimension.

The code is below:

<?
$src = $_GET['src'];

header('Content-type: image/jpeg');

//this will prevent the watermark from showing up in the thumbnail images

$size = getimagesize($src);
if ($size[1] < 530) {
$watermark = imagecreatefrompng('empty.png');
} else {
$watermark = imagecreatefrompng('watermark.png');
}

$watermark_width = imagesx($watermark);
$watermark_height = imagesy($watermark);
$image = imagecreatetruecolor($watermark_width, $watermark_height);

if(eregi('.gif',$src)) {
$image = imagecreatefromgif($src);
}
elseif(eregi('.jpeg',$src)||eregi('.jpg',$src)) {
$image = imagecreatefromjpeg($src);
}
elseif(eregi('.png',$src)) {
$image = imagecreatefrompng($src);
}
else {
exit("Your image is not a gif, jpeg or png image. Sorry.");
}

$dest_x = $size[0] - $watermark_width - 0;
$dest_y = $size[1] - $watermark_height - 0;
imagecolortransparent($watermark,imagecolorat($watermark,0,0));
imagecopyresampled($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, $watermark_width, $watermark_height);

imagejpeg($image, "", 95);
imagedestroy($image);
imagedestroy($watermark);
?>

I am going to make this image even more transparant and i want to have it as the absolute center or any image.

Any idea what i need to change to do this?

Many thanks,

Andy

 

[marc2003]

simple maths innit

$dest_x = ($size[0] - $watermark_width) / 2;
$dest_y = ($size[1] - $watermark_height) / 2;

 

[Aruffell]

simple maths innit

$dest_x = ($size[0] - $watermark_width) / 2;
$dest_y = ($size[1] - $watermark_height) / 2;

Thanks matey worked a treat

Andy

 

[_TubbZ_]

If it sets the image by the top left pixel then you need to offset it by half the image to get a central position...