[konsole] [Bug 401463] bad border rendering in mc inside konsole

[Kurt Hindenburg]

https://bugs.kde.org/show_bug.cgi?id=401463

Kurt Hindenburg <kurt.hindenburg at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Latest Commit|https://commits.kde.org/kon |https://commits.kde.org/kon
                   |sole/14b3c8be2c15ed9711b130 |sole/807ac77061604c2ac7cf84
                   |8b4a991de4aad5802d          |b0a0b29dd949a6c634

--- Comment #14 from Kurt Hindenburg <kurt.hindenburg at gmail.com> ---
Git commit 807ac77061604c2ac7cf84b0a0b29dd949a6c634 by Kurt Hindenburg, on
behalf of Martin T. H. Sandsmark.
Committed on 21/12/2018 at 16:05.
Pushed by hindenburg into branch 'Applications/18.12'.

fix drawing box chars, avoid storing and saving state all the time

Summary:
to get the box chars to be drawn correctly we need to turn on high
quality antialiasing in qpainter. in addition only turn it on if
antialiasing is enabled.

lastly qpainter.save()/restore() is called very often, so try to avoid
that if it isn't necessary.

Test Plan:
`cat tests/boxes.txt`

old:

{F6428268}

new:

{F6450304}

Reviewers: #konsole, hindenburg

Reviewed By: #konsole, hindenburg

Subscribers: wbauer, konsole-devel, #konsole

Tags: #konsole

Differential Revision: https://phabricator.kde.org/D16947

(cherry picked from commit 14b3c8be2c15ed9711b1308b4a991de4aad5802d)

M  +20   -25   src/TerminalDisplay.cpp

https://commits.kde.org/konsole/807ac77061604c2ac7cf84b0a0b29dd949a6c634

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