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Re: help about the display iterator.
From: |
A. Soare |
Subject: |
Re: help about the display iterator. |
Date: |
Fri, 16 Jan 2009 18:24:23 +0100 (CET) |
Thanks.
Yes, I have read the beginning of xdisp.c.
I have also saw the trace of redisplay_internal. I did saw that
redisplay_internal is the function that created the desired_matrix, i.e. the
new image of the next refresh of screen. And also from redisplay_internal are
called the low-level graphical functions that send the image to the video card.
What confuses me very hard is the number of variables that appear inside
redisplay_internal. I do not understand where to start reading this function.
For example, when I see
/* The flag redisplay_performed_directly_p is set by
direct_output_for_insert when it already did the whole screen
update necessary. */
if (redisplay_performed_directly_p)
{
redisplay_performed_directly_p = 0;
if (!hscroll_windows (selected_window))
return;
}
I understand that when redisplay_internal is called after
direct_output_for_insert, redisplay_internal stops here. But
direct_output_for_insert is never called on my emacs. I use GTK+ now.
So it is almost impossible to understand what happens just looking at the code.
To be more specific, let us consider this simple case: suppose that I use the
console, not graphics, and that I press the key 'x'; could you make me a brief
description of the trace of the code, starting from the moment when the
function read_char forces redisplay, until the character is send to the
phisical display?
Thanks in advance for any help.
Alin.
>
> "A. Soare" <address@hidden> writes:
>
> > However, I do not understand the mechanism from `redisplay_ineternal'
> > (I have the impression that it's this function that creates the
> > desired_matrix of glyphs) and refresh the display.
>
> You'll have to be more specific in asking these sorts of questions, I'm
> afraid. Have you looked at the commentary at the beginning of xdisp.c?
>
>
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