Subject: bug#19060: [FIX INCLUDED] Off-by-one-line scrolling bug in window_scroll_pixel_based

From: Angelo Graziosi <[email-masked]>
Date: Sat, 15 Nov 2014 15:10:26 +0100

Martin Rudalics wrote:
> IIUC we have a rounding issue which makes us go by one line too
> far or too few when scrolling up and your patch compensates that
> rounding issue by putting it back into that window_box_height (w) / dy
> calculation.

Apparently, this seem related, in some way, to what I flagged here:

  http://lists.gnu.org/archive/html/bug-gnu-emacs/2014-11/msg00621.html

..or not?

Ciao,
  Angelo.