Add class to image field

Question

I'm looking for a way to add a class field to Drupal's image field (field_image). At the moment my images are displayed using code like this:

<img alt="Alternate text here" src="/path/to/image" />

I'd like to add a class field so that the code would be like so:

<img alt="Alternate text here" class="portrait floatLeft" src="/path/to/image" />

I think I could achieve this by adding a field to the content type to store the class name - I could then use views to add the class value to the image's parent DIV. However, I suspect there's a way to add a class field to the image field itself - it's not uncommon for images to have classes ;)

I've tried the File Entity module, which according to the documentation allows you to create custom file types. Sadly it doesn't explain how.

Any pointers / suggestions would be much appreciated.

Edit: To clarify, I'd like to be able to add classes on a per image basis. Some images might need the classes portrait floatLeft, others might need landscape floatNone and so forth.

Answer 1

Consider looking at the Image Class module, which extends the Image formatter by adding an option to add an element class.

It requires the Field formatter settings module (dependency).