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Re: Stipples and scroll optimizations
From: |
Eli Zaretskii |
Subject: |
Re: Stipples and scroll optimizations |
Date: |
Sun, 08 May 2022 14:29:37 +0300 |
> From: Po Lu <luangruo@yahoo.com>
> Cc: emacs-devel@gnu.org
> Date: Sun, 08 May 2022 18:59:52 +0800
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > But that can be different (even VERY different) from what _should_ be
> > on the glass. We cannot rely on the current matrix for making such
> > decisions.
>
> Yes, but the problem here is that we cannot copy what already _is_ on
> the glass if there is a stipple. So the contents of the desired matrix
> are irrelevant for our purposes.
Not necessarily true. update_window does this:
/* Try reusing part of the display by copying. */
if (row < end && !desired_matrix->no_scrolling_p) <<<<<<<<<<<<<
{
int rc = scrolling_window (w, (tab_line_row != NULL ? 1 : 0)
+ (header_line_row != NULL ? 1 : 0));
If the desired matrix is irrelevant, why do we test the no_scrolling_p
flag on that matrix?
Anyway, feel free to do it your way, but I'd be very weary of using
flags from the current matrix if a safer method exists.
- Stipples and scroll optimizations, Po Lu, 2022/05/08
- Re: Stipples and scroll optimizations, Eli Zaretskii, 2022/05/08
- Re: Stipples and scroll optimizations, Po Lu, 2022/05/08
- Re: Stipples and scroll optimizations, Eli Zaretskii, 2022/05/08
- Re: Stipples and scroll optimizations, Po Lu, 2022/05/08
- Re: Stipples and scroll optimizations, Eli Zaretskii, 2022/05/08
- Re: Stipples and scroll optimizations, Po Lu, 2022/05/08
- Re: Stipples and scroll optimizations, Eli Zaretskii, 2022/05/08
- Re: Stipples and scroll optimizations, Po Lu, 2022/05/08
- Re: Stipples and scroll optimizations,
Eli Zaretskii <=
- Re: Stipples and scroll optimizations, Po Lu, 2022/05/08
- Re: Stipples and scroll optimizations, Po Lu, 2022/05/08