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From: "Gerd Möllmann" <gerd.moellmann@gmail.com>
To: Po Lu <luangruo@yahoo.com>
Cc: 56559@debbugs.gnu.org
Subject: bug#56559: 29.0.50; Invalid CGContextSaveState on NS
Date: Fri, 15 Jul 2022 15:25:01 +0200	[thread overview]
Message-ID: <2A6EEE0E-8DA9-4C88-970C-A13ACCA9F914@gmail.com> (raw)
In-Reply-To: <8735f2oaoq.fsf@yahoo.com>

Can I please ask another question?  You seem to be the only one here knowing the NS stuff.

I'm looking at the ns_focus/ns_unfocus stuff,.  From just eading the code, it appears to me that nested calls liek so:

  1 ns_focus          in ns_draw_window_cursor
  2   ns_focus        in draw_.*
  3   ns_unfocus      in draw_.*
  4   ...
  5 ns_unfocus        in ns_draw_window_cursor

are not supported, or is the intention that they are?

My hypthesis is the ns_unfocus in line 3 above undoes the ns_focus from line 1, or parts thereof, I haven't checked that thoroughly.

To make that a theory, I've added an ns_focus like so

      ns_focus(f, NULL, 0);
      [NSBezierPath strokeRect:NSInsetRect(r, 0.5, 0.5)];

and voilà the error is gone.




  reply	other threads:[~2022-07-15 13:25 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-14 15:08 bug#56559: 29.0.50; Invalid CGContextSaveState on NS Gerd Möllmann
2022-07-15  2:43 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-15  9:50   ` Gerd Möllmann
2022-07-15  9:54     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-15 10:33       ` Gerd Möllmann
2022-07-15 11:52         ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-15 13:25           ` Gerd Möllmann [this message]
2022-07-15 14:01             ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-15 14:12               ` Gerd Möllmann
2022-07-16  3:05                 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-15 13:05 ` Daniel Martín via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-15 13:14   ` Gerd Möllmann

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