bug#38731: [PATCH] Calculate first glyph to be redrawn when exposing (bug#38731)

[HaiJun Zhang]

It is fixed. Thanks.

Can you see another bug #38727. It is also Darwin-specific. It causes flicker.

在 2019年12月29日 +0800 PM6:46，Alan Third <alan@idiocy.org>，写道：

On Sat, Dec 28, 2019 at 08:27:35PM +0200, Eli Zaretskii wrote:

Date: Sat, 28 Dec 2019 11:20:13 +0000
From: Alan Third <alan@idiocy.org>
Cc: netjune@outlook.com, 38731@debbugs.gnu.org

A minimal, and possibly correct, fix is:

modified src/xdisp.c
@@ -33491,7 +33491,7 @@ expose_area (struct window *w, struct glyph_row *row, const Emacs_Rectangle *r,

if (area == TEXT_AREA && row->fill_line_p)
/* If row extends face to end of line write the whole line. */
- draw_glyphs (w, 0, row, area,
+ draw_glyphs (w, row->x, row, area,
0, row->used[area],
DRAW_NORMAL_TEXT, 0);
else

This change LGTM, thanks. If it solves your problem, then we can
close this issue.

Thanks. Pushed to emacs-27.
--
Alan Third