STRPTR name = GetImageFormat(APTR handle);
HWEXT_IMAGE_FORMAT
extension bit has been set. See Extension plugins for details.
If that is the case, this function must return a null-terminated string
containing the name of the format of the image file handle passed in handle
. The
string returned by this function can be retrieved from Hollywood scripts by querying
the #ATTRFORMAT
attribute on image-based objects like #BRUSH
or #BGPIC
. The string
you return must be valid until FreeImage() is called on the image handle
passed to this function.