With static display of a text, it's the same: the columns of each 8x8 matrix are inverted.

Thanks for your answer. Very intersting library. But, with its examples, there is an addressing issue on my display. For each 8x8 matrix the columns seem to be inverted, displaying first the column #8 instead of column #1. So the global scrolling is OK from right to left (first to last matrix of the daisy-chain), but each matrix is scrolling its columns from left to right with inverted display!