From: Keith David Bershatsky <esq@lawlist.com>
To: Alan Third <athird@googlemail.com>
Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
Subject: Re: Drawing dirty rectangles with expose_window: row->clip = fr
Date: Wed, 03 Apr 2019 12:28:57 -0700 [thread overview]
Message-ID: <m2wokac2h2.wl%esq@lawlist.com> (raw)
After some additional testing and digging into the core code of Emacs, I made the following observations:
. ns_draw_window_cursor calls ns_clip_to_rect, which does _not_ take "row->clip" into consideration when drawing cursors with NSRectFill.
. When it comes time to draw glyphs on top of the box/hollow family of cursors, "row->clip" is taken into consideration by get_glyph_string_clip:
if (s->row->clip)
{
XRectangle r_save = r;
if (! x_intersect_rectangles (&r_save, s->row->clip, &r))
r.width = 0;
}
Inasmuch as fake cursors are drawn immediately following calls to draw_glyphs (e.g., during expose_window), I have created a slightly modified version of ns_clip_to_rect that takes "row->clip" into consideration and calls an NS version of x_intersect_rectangles ... In a few tests, this approach appears to be achieving the desired results.
Keith
next reply other threads:[~2019-04-03 19:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-03 19:28 Keith David Bershatsky [this message]
-- strict thread matches above, loose matches on Subject: below --
2019-04-02 20:42 Drawing dirty rectangles with expose_window: row->clip = fr Keith David Bershatsky
2019-04-02 17:42 Keith David Bershatsky
2019-04-02 16:27 Keith David Bershatsky
2019-04-02 16:51 ` Eli Zaretskii
2019-04-02 1:55 Keith David Bershatsky
2019-04-02 14:48 ` Eli Zaretskii
2019-04-02 19:34 ` Alan Third
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