Re: Correct way to implement `pixel-point-and-height-at-unseen-line'?

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: help-gnu-emacs@gnu.org
> Date: Wed, 15 Dec 2021 08:40:37 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > But if you always need the line before window-start, i.e. use N = 1,
> > then why is that a problem?
> 
> Ah, I think we're misunderstanding things:
> `pixel-point-and-height-at-unseen-line' is part of a much larger system
> that tries to find the line (and pixel distance) for N = foo, by
> iterating through lines where N = 1.

Well, I did ask you to describe what you need to do, and responded to
the only description you gave ;-)