Changes the GraphicsContext to be managed by the GPU core. This
eliminates the need for the frontends to fool around with tricky
MakeCurrent/DoneCurrent calls that are dependent on the settings (such
as async gpu option).

This also refactors out the need to use QWidget::fromWindowContainer as
that caused issues with focus and input handling. Now we use a regular
QWidget and just access the native windowHandle() directly.

Another change is removing the debug tool setting in FrameMailbox.
Instead of trying to block the frontend until a new frame is ready, the
core will now take over presentation and draw directly to the window if
the renderer detects that its hooked by NSight or RenderDoc

Lastly, since it was in the way, I removed ScopeAcquireWindowContext and
replaced it with a simple subclass in GraphicsContext that achieves the
same result

Adds a Qt and SDL2 frontend for Vulkan. It also finishes the missing
bits on Vulkan initialization.

MakeCurrent is a costly (according to Nsight's profiler it takes a tenth
of a millisecond to complete), and we don't have a reason to call it
because:
- Qt no longer signals a warning if it's not called
- yuzu no longer supports macOS

We can make this message more meaningful by indicating the location the
screenshot has been saved to. We can also log out whenever a screenshot
could not be saved (e.g. due to filesystem permissions or some other
reason).

Treating it as a u16 can result in a sign-conversion warning when
performing arithmetic with it, as u16 promotes to an int when aritmetic
is performed on it, not unsigned int.

This also makes the interface more uniform, as the layout interface now
operates on u32 across the board.

This class contains non-trivial members, so we should default the
destructor's definition within the cpp file.

Same thing (for platforms we support), less reading.

This function is defined as taking an int, not a bool.

We can just pass a pointer to GMainWindow directly and make it a
requirement of the interface. This makes the interface a little safer,
since this would technically otherwise allow any random QWidget to be
the parent of a render window, downcasting it to GMainWindow (which is
undefined behavior).

We can just invoke these functions by qualifying the object name before
the function.

There's no performance improvement in passing an unsigned pair by
reference.

Allows the bootmanager code to compile with implicit string conversions
disabled.

Nvidia's proprietary driver creates a real OpenGL compatibility profile
without this option, meanwhile Intel (and probably AMD, I haven't tested
it) require that QSurfaceFormat::FormatOption::DeprecatedFunctions is
explicitly enabled.

This option allows picking the compatibility profile since a lot of bugs
are fixed in it. We devs will use this option to easierly debug current
problems in our Core implementation.:wq

The default constructor will always run, even when not specified, so
this is redundant.

However, the context member can indeed be initialized in the constructor
initializer list.

Resolves -Wreorder warnings. These will automatically be initialized to
nullptr anyways, so these were redundant.

Since C++17, the introduction of deduction guides for locking facilities
means that we no longer need to hardcode the mutex type into the locks
themselves, making it easier to switch mutex types, should it ever be
necessary in the future.

While we are at it, remove nullptr checks for deletion, since the C++
standard defines that delete does it by its own

Changes the interface as well to remove any unique methods that
frontends needed to call such as StartJoystickEventHandler by
conditionally starting the polling thread only if the frontend hasn't
started it already. Additionally, moves all global state into a single
SDLState class in order to guarantee that the destructors are called in
the proper order

With the loading screen merged, we don't want to actually show at this
point, but it still needs to be shown to actually create the context.
Turns out you can just show and hide it immediately and it'll work.

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.

Allows capturing screenshot at the current internal resolution (native for software renderer), but a setting is available to capture it in other resolutions. The screenshot is saved to a single PNG in the current layout.

This gets rid of an unnecessary type conversion. We can just use the
regular QStringLiteral to already format the string as the type
setWindowTitle accepts instead of converting from a std::string
instance.

change TouchToPixelPos to return std::pair<int, int>

static_cast (SDL)

various minor style and code improvements

style - PascalCase for function names

made touch events private

const pointer arg in touch events

make TouchToPixelPos a const member function

did I do this right?

braces on barely-multiline if

remove question comment (confirmed in Discord)

fixed consts

remove unused parameter from TouchEndEvent

DRY - High-DPI scaled touch put in separate function

also fixes a bug where if you start touching (with either mouse or touchscreen) and drag the mouse to the LEFT of the emulator window, the touch point jumps to the RIGHT side of the touchscreen; draggin to above the window would make it jump to the bottom.

implicit conversion from QPoint to QPointF, apparently

I have no idea what const even means but I'll put it here anyway

remove unused or used-once variables

make touch scaling functions const, and put their implementations together

removed unused FingerID parameters

QTouchEvent forward declaration; add comment to TouchBegin that was lost in an edit

better DRY in SDL

To do -> TODO(NeatNit)

remove unused include