Is the textconv filter called for each line ? or once for the file ?

Hi all,

Something I need clarification please :

In the documentation on gitattributes, it is said :

"A textconv, by comparison, is much more limiting. You provide a transformation
of the data into a line-oriented text format, and git uses its regular diff 
tools to generate the output."

Does it mean that the textconv filter is called for each line ? The opposite
being called once for the whole file.

Regards,


Laurent.