fallback

Version generation is based on the assumption that the original version of an image is larger than the image size specified with maxHeight and maxWidth. fallback specifies what to do when this is not the case: if, for example, the original image is 160x200 and the maximum size of this version is defined as 300x200.

Syntax
<fallback
    operation="(copy|skip|resize)"
  />
Attributes
operation="(copy|skip|resize)"

Specifies the fallback action to be taken.

Allowed values are:

copy (default)

Use the original version with no scaling applied (recommended).

skip

Do not generate this version of the image.

resize

Scale the image up to the required size. This may result in a poor quality image.