Insert watermarks in photos

Question

Images

Tell me how best to insert watermarks in the photo

1. Generate all photos in advance with watermark overlay
2. Generate photos on the fly using a script
3. Write your own module for Nginx/Apache for photo processing

2.3 option naturally with caching from generated photos. to avoid re-processing.

The thing is that you need to store simultaneously a photo with a sign and without a sign.

Answer 1

If you are better with C/C++ than with PHP/Ruby/Python (or whatever you write the server side on), then point #3.
If your skill in the server language is higher or equal to C / C ++, then of course the second option.

Answer 2

Same for the second option. Here on Habré it was already considered how to make a watermark.

Answer 3

you answered your own question: store two instances (the original outside the web directory), with a watermark in the target.
process photos in the process of adding: added a new product, saved the original image, applied a sign, saved.
in general KISS

Answer 4

As I did.
1. I wrote a rewriterule in .htaccess so that all image accesses are transferred to a special php script.
2. The script checked if there is a picture with a watermark in the cache
2.1 If there is, then it gave this picture through readfile()
2.2 If not, then put a sign and save it to the cache. We output again, via readfile()
And here is the rule for .htaccess We check that it is a jpg or jpeg image ... ... so that this image is not requested from the admin panel and ... ... we send a request to the script In the script, the image is available in $ _SERVER ['REQUEST_URI']
RewriteCond %{REQUEST_URI} \.(jpeg|jpg)
RewriteCond %{HTTP_REFERER} !textpattern
RewriteRule \.(jpeg|jpg) /images/watermark/index.php [NC]

Answer 5

Of course, you need to generate images with watermark as they arrive (it can be delayed if there are a lot of images) - but not as requested. On the fly - you run the risk of getting "hurt".
I would write a cron script that fetches all files by find, with the last modification less than or equal to the call timeout of the cron-rule itself, and then use the console imagik. He copes with this task with a bang.
Total - the solution to your problem fits in one line

Answer 6

choose the first option and don't worry