[gtk: 2/2] Merge branch 'wip/chergert/speedup-char_is_invisible' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

commit 6ec96d2e989d029a303b8b20ec72b86f974c0e87
Merge: 1bc1b82256 6c8d47f585
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Mar 19 01:20:21 2020 +0000

    Merge branch 'wip/chergert/speedup-char_is_invisible' into 'master'
    
    textbtree: short-circuit visibility check when possible
    
    See merge request GNOME/gtk!1534

 gtk/gtktextbtree.c           |  9 ++++++++-
 gtk/gtktexttagtable.c        | 27 +++++++++++++++++++++++++++
 gtk/gtktexttagtableprivate.h | 15 ++++++++-------
 3 files changed, 43 insertions(+), 8 deletions(-)
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