Miscellaneous Hacks - Watermark Attachments

Product: 1
Plugin: 2
Query: 0

tested only on the pure installation of vbulletin. install at your own risk to work with other attachment mods.

Feature

* put a logo (watermark) on your attachments.
* option to watermark only attachments after X days of creation. this helps your hotlinked images become free ads.
* option to watermark thumbnails but stop hotlinking to full size image (return a blank image instead)
* option NOT to watermark images for traffic from certain sites

Install

Step 1: import product-watermark.xml
Step 2: create and upload your own watermark logos. one for top and one for bottom.
Step 3: put the absolute path of watermark images into options. (/var/www/html/.../watermark.png)
Step 4 (optional) : if you don't want the attachments watermarked viewing on your own site or some other friend sites (like google image), just put the domains into "Skip Referer" option.

Not working
1. set the "Days Delay" option to 0
2. refresh your cache by press Ctrl-F5.
3. the watermark images should be in PNG format with transparent background.
4. check the "Safe Mode Temporary Directory" option. the directory should be writable.
5. only works for PNG, GIF, JPG attachments.
6. only works if the attachments are stored in the filesystem.
7. GD library should be installed.

Todo
* currently, we have to create a temp file while sending a watermarked attachment. It will be appreciate if anybody can help me to get rid of this.




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[bjhuang]

Originally Posted by xmobile

what format to use in "Path of top watermark"?:
images/logo.png or http://mydomain/forums/images/logo.png

/var/www/html/forum....

[bjhuang]

Originally Posted by Sweeks

I am sure some of our attachments are no longer opening properly too and I have never witnessed this prior to installation and still happens on uninstallation.

this mod watermark attachments on the fly. it won't write or modify anything back to the database. maybe you should check your plugins to see if there are other mods hooked to attachment_display or attachment_complete. if they write data back to the db after watermarked attachments were created, there is a probability causing some problems.

[netcommander]

can we change watermark position ? is it possible

[denman75]

is not working ,thats to bad

[bjhuang]

Originally Posted by netcommander

can we change watermark position ? is it possible

well, it's not hard with a little coding PHP coding knowledge.

Try to modify these lines in plugin "Watermark Attachments - Display":

PHP Code:

            if($wm_t&&imagesx($im_a)>imagesx($wm_t)) {    
                imagefilledrectangle($im_a, 0 , 0 , imagesx($im_a) , imagesy($wm_t) , imagecolorallocatealpha($im_a, 0, 0, 0, 100) );
                imagecopy($im_a, $wm_t, imagesx($im_a)-imagesx($wm_t), 0, 0, 0, imagesx($wm_t), imagesy($wm_t));
            }
            if($wm_b&&imagesx($im_a)>imagesx($wm_b)) {    
                imagefilledrectangle($im_a, 0 , imagesy($im_a)-imagesy($wm_b) , imagesx($im_a) , imagesy($im_a) , imagecolorallocatealpha($im_a, 0, 0, 0, 100) );
                imagecopy($im_a, $wm_b, imagesx($im_a)-imagesx($wm_b), imagesy($im_a)-imagesy($wm_b), 0, 0, imagesx($wm_b), imagesy($wm_b));
    
            } 


[glennybee]

Nice mod, tagged for later.

[vemkeit]

Thanks nice mod... it works great in Firefox and IE 7

[devilsown]

I am not having any luck getting this to work.
my path is set to /var/www/images/watermark.png
which is how i find it in ftp client.

i have the image on my server at/ http://www.grandprixforums.net/images/watermark.png

i have my images stored in the file system.
this is my image. http://www.grandprixforums.net/attac...ntroller_s.jpg

[bjhuang]

this mod add watermarks on the fly. it won't modify your images. you browse the image with a direct link to the jpg, and of course there is no watermark on it.

Originally Posted by devilsown

I am not having any luck getting this to work.
my path is set to /var/www/images/watermark.png
which is how i find it in ftp client.

i have the image on my server at/ http://www.grandprixforums.net/images/watermark.png

i have my images stored in the file system.
this is my image. http://www.grandprixforums.net/attac...ntroller_s.jpg

[sleepyboy2004]

Not working for me