GNU bug report logs - #11052
24.0.94; Display problem under OS X Lion

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From: Richard Stanton <stanton <at> haas.berkeley.edu>
To: Jan Djärv <jan.h.d <at> swipnet.se>
Cc: "11052 <at> debbugs.gnu.org" <11052 <at> debbugs.gnu.org>
Subject: bug#11052: 24.0.94; Display problem under OS X Lion
Date: Sat, 31 Mar 2012 16:10:12 -0700

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I'm running the latest version of Lion (10.7.something - I'm not in front of my Mac right now).

From: Jan Djärv [mailto:jan.h.d <at> swipnet.se]
Sent: Saturday, March 31, 2012 10:57 AM
To: Richard Stanton
Cc: 11052 <at> debbugs.gnu.org
Subject: Re: bug#11052: 24.0.94; Display problem under OS X Lion

Hello.

20 mar 2012 kl. 18:52 skrev Richard Stanton:


The truncated numbers and line of extra pixels both go away if you execute M-x fringe-mode -> no-fringes, so I suspect a counter in the left-fringe code may be off by a few pixels somewhere.

You are correct, there is some strange adjustment going on in ns_draw_fringe_bitmap:

  /* NS-specific: move internal border inside fringe */
  int x = p->bx < 0 ? p->x : p->bx;
  int wd = p->bx < 0 ? p->wd : p->nx;
  BOOL fringeOnVeryLeft
    = x - WINDOW_LEFT_SCROLL_BAR_COLS (w) * WINDOW_FRAME_COLUMN_WIDTH (w)
      - FRAME_INTERNAL_BORDER_WIDTH (f) < 10;
  BOOL fringeOnVeryRight
    = FRAME_PIXEL_WIDTH (f) - x - wd - FRAME_INTERNAL_BORDER_WIDTH (f)
      - WINDOW_RIGHT_SCROLL_BAR_COLS (w) * WINDOW_FRAME_COLUMN_WIDTH (w) < 10;
  int xAdjust = FRAME_INTERNAL_BORDER_WIDTH (f) *
    (fringeOnVeryLeft ? -1 : (fringeOnVeryRight ? 1 : 0));

Now, if you set xAdjust unconditionally to zero, the problem goes away.  I don't yet know the rationale for this.  It may be something that was needed at some point, or is needed on some systems.  What OSX version are you running?

          Jan D.

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