Thumbnails are created for frontpage, blog, articles, mod_custom and intro_image.
Also can set values for Itemid
Thumbnail size can be specified in the article. To do this, add a stylesize (or ss) or tagsize (or ts) class. For the class stylesize used the size specified in the attribute style. For the class tagsize used the size specified in the attributes width and height.
Adding to the image watermark.
Thumbnails are not made for the images in the link, in div and images with class nothumb.
Can download a separate file for the thumbnail. The file has the following form custom-filename.jpg
For external links added "outer" class
jdvthumbs does that well, and offers different settings (e.g. sizes) for Featured articles, Blog Pages, Articles and more.
It can also add a watermark on all your images in seconds.
And basic functions are very easy to configure.
Cons (possible improvements):
Support: well, i found a form on the author's website and after translating it from Russian I sent them a message about the PHP Warning described below. Am waiting for a reaction.
It rename the rezized images from their PATH. i.e. an image that shows up on 5 (blog) pages will have 5 differents thumbnails, adding as many files and therefore, requests on the server.
Watermark does not handle PNG alpha imgs
Beware of some Rezise settings, I've found out some have awful results, like "source": it can multiply the image's size by a factor of 40x!
e.g., a png image, original is: 438x438 px, 6.29 KB
In jdvthumbs settings
- thumbnail is 199x199 px and 248 KB (!) with Method: PNG's alpha-channel: Yes; Thumbnail's Type: source; Area for cropping images: Middle.
- Or 199x199 px, 3.65 KB with thumbnail's Type jpg.
Note that Smush.it resizes the same image at 2.6 KB while keeping it PNG.
If on a PHP 5.3+ server with jdvthumbs you ever get a warning (Warning: Parameter 3 to plgContentJdvthumbs onPrepareContent). Just edit jdvthumbs.php's syntax to be PHP 5.3 compliant and the Warning is gone. (this has countless references on the Web)
I much prefer this approach to the one in the Joomla core which involves creating separate article and thumbnail images. This means it's quite easy for users to generate images of different widths, so losing consistency.
Using jdvThumbs all of the thumbnails in blog views are the same width, and the image itself also acts as a link to the article.
Once in the article, again the image is a consistent width - with an optional slimbox popup if the original uploaded image was larger.
Different sizes can be set for featured articles and articles appearing in mod_custom modules.
Global settings can be overridden for individual images, and the resampling can be set to a bounding box, width, height or a crop of the original.
Likely to be part of my toolbox of standard extensions I install on all of my sites.
I am now using it on joomla 1.7 without a problem
of course there are some minor bug (I found one).
And I wish the possibility to choose whether showing full size image or thumbnail in article view layout.