Maniac Patch: Implement Load, Save, SaveInfo and Mouse input

[Ghabry]

This implements the imo most useful commands of the Maniac Patch (except for String picture, this is also pretty cool!)

Still have to do careful testing of this again. There shouldn't be regressions as the code is usually in ManiacPatch checks.

Discussion:

Load

This does a Async Load (yields the interpreter), in Maniac it loads directly, this is incompatible with how our code works.

The parameter for checking whether the save exists is ignored, in RPG_RT loading a non-existant save simply crashes.

Save

This does a Async save (Yields the interpreter), in Maniac this saves directly resulting in saving at an undefined state because there is stuff in temporaries. So yielding here is safer.

Get Save Info

In Maniac this is implemented by setting the arguments (or not if the pic exists) and then doing a jump just before the 2k3E picture code that handles layers etc. (so save game pictures shown inherit the attributes of the current picture in the slot)
As we cannot really do this I added a function for retrieving the current Show Params instead.
There will be likely minor incompatibilities here, but when they do not do anything fancy with the picture it should work...

Key Input Proc (Mouse)

Had to add "& 2"-checks where applicable as Maniac uses bit 1 of certain keys for this:

• Confirm: Mouse left
• Cancel: Mouse right
• Shift: Mouse middle
• Up: Wheel Up
• Down: Wheel Down

To reduce chaos in the code this will only work properly with RPG2k3E, KeyInput is already messy enough, so sorry, no fully Maniac mouse input in Player for 2k ;).

New return values in Control Variables

Maniacs added tons of stuff here, also new ops like sin and pow. For now I only add the absolute minimum:

• Current Time (Maniac reuses the savegame time function here, I use stdlib time functions)
• Frame counter
• Maniac version: Returns the highest version available before the engine was replaced with this replace

ValueOrVariable

Maniac Patch adds support for "Variable indirect", "Switch" and "Switch Indirect" to some event commands (and I guess with TPC and the new engine to even more).

To make this easier for me I simply added this handling to ValueOrVariable which is our resolver for this indirection stuff.

Has the side-effect that all event commands that support indirection got these features now with a minimal code change.

This e.g. implements for Call Event: "Added method to specify common event by variable number variable."

[Ghabry]

Already found some bugs:

Load

Forgot to remove the warning (upps)

Different behaviour:
ManiacPatch goes from black to fade-in here, this is not implemented

Key Input Proc

Wheel Up and Right click not working (Copy paste error)

---

The rest appears to work. In the new, rewritten Maniac Patch GetSaveInfo seems to be kinda broken o_O