Granular Scrcpy inject mode settings

[yume-chan]

Mouse:

mode	as device type	coordination mode	hover	right/middle click	scroll	cursor shows on
software	mouse	absolute	yes	yes	scroll wheel event	host
software	touch	absolute	no	no	emulate swipe	host
hid	mouse	relative	yes	yes	scroll wheel event	device
hid	touch	absolute	no	no	emulate swipe	host

Keyboard:

mode	inject type	game compatible	non-ASCII	hide on-screen keyboard
software	key event	yes	no	no
software	inject text	no	no	no
software	inject clipboard	no	yes	no
hid	key event	yes	no	yes

Paste:

mode	inject type	non-ASCII	change device clipboard
software	inject text	no	no
software	inject clipboard	yes	yes

Touch:

mode
software
hid

Gamepad:

mode	require root
uinput	yes
hid	no

• hid mode only available when connected over USB.
• uinput mode not available on some devices unless rooted

[yume-chan]

Generally, uinput ≈ hid > software

uinput requires Genymobile/scrcpy#2130 + mouse/keyboard/touchscreen support.

HID keyboard is better than software injection in all aspects except it requires USB, so it will always be used when possible.

HID mouse, on the other hand, requires mouse capture. The advantage of HID mouse is being able to use Android pointer capture API (from Android 8), for some games like Minecraft. But the integration is too complex, so postpone. Also mouse capture requires keyboard lock to intercept ESC key, and keyboard lock requires full screen, this further limits the usefulness.

[yume-chan]

This issue is originally about the (old) demo, because both software and AoA approaches are already implemented in the libraries.