A basic justification algorithm for HarfBuzz-NG

This does mostly the same HB-old did, except of non-BMP codepoints
support and better handling of space and punctuation characters.

Change-Id: Iaf8565a35f27d5f4837128cec345eff3d9d2bdf0
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Remove useless QMetaType benchmarks

Cost of a type lookup for core built-in types is really small, just few
cpu instructions, but the benchmark was testing create() and destroy()
functions (in a different fashion) which by definition allocate and
de-allocate memory. These memory operations are significantly more
expensive which obfuscate the results.

Change-Id: I33c679f57e6c2b57e98328f076dfe249ab7bcde8
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Stephen Kelly <steveire@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Add missing to gui/kernel benchmarks.

kernel.pro was not updated.

Change-Id: Ibe11aaf5d6e788dacd2a2d33088fb9445334fb4e
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Fix typo with impact on test output

If the test fails here, output the values actually used in comparison.

Change-Id: Ie4ed5ebdf1951c02b89a9648aee50a99d0bb0628
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Ensure mutating operations are NOT performed on immutable data

"Static" and "raw" data are immutable and shouldn't be modified from
within the QArrayData API. Adding the asserts here gives us a basic
safety net.

Change-Id: Ie2fec03fa1ef5a7f73c50e5badf8b8ab863728b4
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Refactor QString::split functions.

Implementation of the functions were moved to templatized helper
functions that will be shared with QString::splitRef in future.

Change-Id: Ie25fab57f77f5ceb11ced26ab7e7f86739f4c78b
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Don't track the sharable bit upon detach

"Unsharables", given they can't be shared, don't need to detach, so skip the
check altogether and don't try to propagate the flag. It shouldn't be.

Change-Id: Icc483401d5a57708b43d64bd3cebc66c6b934815
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Logging: support %{backtrace} in QT_MESSAGE_PATTERN

On supported platform, allow to show a backtrace by using
%{backtrace} or %{backtrace depth=N separator="|"}

[ChangeLog][QtCore][Logging] QT_MESSAGE_PATTERN can include a
backtrace using %{backtrace}

Change-Id: Ib00418c070d3bd6fe846dc04bf69fa91ba64f9cd
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
tst_QFont: remove unused static function

This function has been inlined in commit 4f50be8d,
but wasn't removed.

Change-Id: I1a4eb7399ab2dd87a9fb15c4c886004d777487a8
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Windows: correct tablet stylus rotation to range -180..180 degrees

When the user holds the Wacom Art Pen straight, rotation is zero;
when turning it counter-clockwise, it should have a negative angle,
whereas the driver sends a positive angle multiplied by 10;
when turning it clockwise it should have a positive angle up to 180,
whereas the driver sends 360 * 10 going downwards towards 180 * 10.
These corrections make the angle reading the same between Linux and
Windows.

Task-number: QTBUG-39570
Change-Id: I9f18ef6629bffa849c8d65cba02d42b21469cebc
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
add buttons to QTabletEvent

Until now, it has been necessary for tablet-oriented applications which
care about multi-button styli to reject each tablet event and wait for
the mouse event in order to know which buttons are pressed.  This patch
adds the new API and also the X11/xcb implementation.

[ChangeLog][QtCore][Tablet support] Added buttons to QTabletEvent

Task-number: QTBUG-39458
Change-Id: If2c9ec1ceacc1700a82686c5fc6f568f9111055a
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Windows: Streamline rawfont-lookup code.

Fix ugly warnings by MinGW:

qwindowsfontdatabase.cpp: In member function '{anonymous}::TableDirectory*
{anonymous}::EmbeddedFont::tableDirectoryEntry(const QByteArray&)':qwindowsfontdatabase.cpp:167:42: warning: comparison between signed and unsigned  integer expressions [-Wsign-compare]
         if (Q_UNLIKELY(m_fontData.size() < sizeof(OffsetSubTable)))
                                          ^
..\..\..\..\include/QtCore/../../src/corelib/global/qcompilerdetection.h:202:49:
 note: in definition of macro 'Q_UNLIKELY'

Change-Id: I47fac598ed1b6623146fb437c00da64d8e8b6984
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
QTabletEvent documentation improvements

Recent patches have added new functionality, and other aspects of the
documentation have been outdated for some time.

Task-number: QTBUG-39458
Change-Id: Ib7013eee091ff443971485133a58785d9284bc3d
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>