## Link to GitHub Issue or related Pull Request, if one exists
Fixes#833
## Description of change
Last couple PRs - such as #820#827#828 - made the native touch hook &
touch injection using `InjectTouchInput` the default path, since it
performs much more reliably with both real touch screens and mouse (or
any other synthetic source).
However, user has reported that WINE lacks `InjectTouchInput` which
means this won't work.
As a fix, revive the old wintouchemu code. Native touch is still the
default, but under following circumstances:
1. if `-touchemuforce` is set, or
2. if any of the required Windows touch APIs are unavailable
then we fail over from native touch to wintouchemu code.
For Linux, condition #2 would be hit during init, and gracefully switch
over.
Caveat: the poke code for IIDX and Nost will continue to require native
touch, I do not want to maintain two paths for this. This means that
iidx poke will stop working on Linux, unfortunately.
## Testing
Tested on Windows with `-touchemuforce` set. This is mostly reverting
Linux code path back to where we were last release, so this should just
work with wine.
## Link to GitHub Issue or related Pull Request, if one exists
n/a
## Description of change
Touch piano mode. Allows piano keys to be played with the touch screen.
Since the touch screen is still needed for menu navigation (including
during songs) a toggle switch is added so that the user can flip between
navigation mode and piano mode.
The touch targets are pixel-perfect. Don't let the game's piano
animations fool you.
## Testing
## Link to GitHub Issue or related Pull Request, if one exists
#814
## Description of change
Switch over Nostalgia from wintouchemu to native touch hook.
Nostalgia has some strict timing requirements (touches must be updated
on every acio poll) so this takes a slightly different path to maintain
mouse holds.
Only a handful of consumers of wintouchemu remain:
1. beatstream - but it's off by default, only enabled as errata for
buggy touchscreens, or if the user forces it on (for Show Cursor)
2. gitadora single-window overlay - this is just for mouse so not a big
deal.
3. MFC HG mode - not a priority to fix.
## Testing
Tested full screen and windowed mode with touch / mouse / poke.
bicarus