[SOLVED] transparent watermarks on images

[gerkintrigg]

hello

I'm using the code below to make a watermark and it's kinda working, but I want it semi-transparent as the PNG file is itself. Is there an easy way of overlaying transparent images in the GD library, so that the original image is merged in such as way that it can be seen through the watermark?

 

Thanks... code to follow.

 

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);  

[Barand]

try adjusting the last argument in the imagecopymerge() to get the desired effect.

 

BTW, the first is redundant:

 

$image = imagecreatetruecolor($watermark_width, $watermark_height); 

$image = imagecreatefromjpeg($_GET['src']);

[gerkintrigg]

That's not exactly what I was looking for, but thanks. That did solve another problem. ;o)

 

My main issue now is:

The watermark PNG has transparent areas in it. Is there any way of preserving these areas like I can in photoshop when layering images with transparent backgrounds.

 

I hope that makes sense.

[Barand]

My png image I used with your code has a transparent background which remains transparent even when the setting is 100 ???

[gerkintrigg]

could you try it with: http://build.nextdaygraphics.com/includes/watermark.php?src= and let me know what happens please Barand?

[Barand]

That link just displayed the URL

[gerkintrigg]

http://build.nextdaygraphics.com/includes/watermark.php?src=<path to your image goes here>

 

?

[Barand]

Attached zip with screenshots of your png and mine (same jpeg background)

 

[attachment deleted by admin]

[gerkintrigg]

Thanks Barand. It seems I had wrong settings when exporting from photoshop.

 

All sorted now.