First attempt at a Slimmage Background Image plugin

[protherj]

This is my first attempt at a Background Images plugin based on the Pull Request #37 from dancek. Slimmage has changed considerably and I hope I got it generally right.

Two problems I'm currently having that I need help with:

1. The var cssMaxWidth = s'getCssPixels'; call always returns null for me and that causes the getImageInfo to return null as well. Thus, the fall back to 3000 if falsy.

2. The call to getImageInfo always seems to return an image with a width of 2048. It's probably my CSS setup somehow, but any help determining the cause would rock.

Also, is this plugin setup properly? I didn't have any examples to go off of, so any help with getting it right is appreciated.

Thanks

[lilith]

You need to have a max-width applied to the element for getCssPixels to work. If there's no constraint, it returns null. Nearly all frameworks include img {max-width:100%} as a sanity limit.

Likewise, a max of 2048 is the default configuration for maximum width.

[lilith]

You should be able to reset to the updated version of 'unstable' and get a cleaner PR. I apologize for 'unstable' being behind 'master'. No idea how that happened, but it is corrected now.