transparent GD watermark.

[cooldude832]

Any one know what would be the best way to accomplish a transparent watermark on upload with GD that will work for Jpegs, Gifs and Pngs,  using only GD in php 4?

[atlanta]

Heres the best and easy way i usually use

You are pretty good with php i believe so all you will have to do is

on upload have that image's path name go to here

 

$image = imagecreatefromjpeg(uploadedfile);

and

$size = getimagesize(uploadedfile);

 

then output the image. with the watermark which is watermark.png

 

'<?php  

header('content-type: image/jpeg');  

$watermark = imagecreatefrompng('watermark.png');  
$watermark_width = imagesx($watermark);  
$watermark_height = imagesy($watermark);  
$image = imagecreatetruecolor($watermark_width, $watermark_height);  
$image = imagecreatefromjpeg($_GET['src']);  
$size = getimagesize($_GET['src']);  
$dest_x = $size[0] - $watermark_width - 5;  
$dest_y = $size[1] - $watermark_height - 5;  
imagecopymerge($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, 100);  
imagejpeg($image);  
imagedestroy($image);  
imagedestroy($watermark);  

?>

[atlanta]

If u need help integrating it post up your code and ill help you out,

[cooldude832]

na, I see what your doing, that wasn't my issue my concern is dealing with file types and the legacy issue of transparent layers in images

[atlanta]

Oh ok so you mean what if a different type of image is uploaded other than a jpeg?