What do scale and inflate do in the ImageMagick file resizer class

Question

I am using ImageMagick via Symfony to resize images in PHP.

The sfThumbnailer class uses 'scale' and 'inflate' parameters to interface with ImageMagick. What do they do and how will they affect my results?

I realise this is a RTFM question, but I already have, and the documentation is not clear.

Image Magick Documentation

Symfony Thumbnail Documentation

Thanks.

Answer 1

Scale

Scale maintains aspect ratio. If set, then aspect will be maintained.

Inflate

Inflate tells script to scale image upward if required. I.e. if set true, then it might increase the width or height if the given width and height are bigger than original width and height.