There was some discussion about updating to Qt6 and I figured I would
work on some smaller parts. For Windows platform the WinMain function has moved
from the Qt5::WinMain to a new one called Qt6::EntryPointPrivate
Also Qt5 supports versionless CMake targets
https://www.qt.io/blog/versionless-cmake-targets-qt-5.15
These other changes in this commit are to support Qt6, but in ways that don't mess with Qt5.
src/yuzu/bootmanager.cpp: Qt6 complains about not being able to know to use QPoint or QPointF, picking QPoint
src/yuzu/bootmanager.h: Qt6 prefers that QStringList.h be included rather than an empty class definition
src/yuzu/configuration/configure_system.cpp: toULongLong intends to return unsigned 64 bit integer, but
Settings::values.rng_seed is only 32 bits wide
src/yuzu/game_list.cpp: Qt6 returns a different datatype for QStringList.length than Qt5,
it used to be int, but in Qt6 its now qsizetype
src/yuzu/loading_screen.cpp: Qt5's for QStyleOption.init say to switch to initFrom.
The QStyleOption.init doesn't exist in Qt6
src/yuzu/main.cpp: Another QPointer and QStringList.size, lets standardize on size()
This formats all copyright comments according to SPDX formatting guidelines.
Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.
With shader caches on the horizon, one requirement is to provide visible
feedback for the progress. The shader cache reportedly takes several
minutes to load for large caches that were invalidated, and as such we
should provide a loading screen with progress.
Adds a loading screen widget that will be shown until the first frame of
the game is swapped. This was chosen in case shader caches are not being
used, several games still take more than a few seconds to launch and
could benefit from a loading screen.
