172 lines
3.5 KiB
C++
172 lines
3.5 KiB
C++
#include "STDInclude.hpp"
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namespace Components
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{
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XINPUT_STATE XInput::xiStates[XUSER_MAX_COUNT];
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int XInput::xiPlayerNum = -1;
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void XInput::PollXInputDevices()
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{
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XInput::xiPlayerNum = -1;
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for (int i = XUSER_MAX_COUNT; i >= 0; i--)
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{
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if (XInputGetState(i, &xiStates[i]) == ERROR_SUCCESS)
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XInput::xiPlayerNum = i;
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}
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}
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__declspec(naked) void XInput::CL_FrameStub()
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{
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__asm
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{
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// poll the xinput devices on every client frame
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call XInput::PollXInputDevices
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// execute the code we patched over
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sub esp, 0Ch
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push ebx
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push ebp
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push esi
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// return back to original code
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push 0x486976
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retn
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}
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}
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void XInput::CL_GamepadMove(int, Game::usercmd_s* cmd)
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{
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if (XInput::xiPlayerNum != -1)
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{
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XINPUT_STATE* xiState = &xiStates[xiPlayerNum];
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cmd->rightmove = static_cast<BYTE>(xiState->Gamepad.sThumbLX / 256);
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cmd->forwardmove = static_cast<BYTE>(xiState->Gamepad.sThumbLY / 256);
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}
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}
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__declspec(naked) void XInput::CL_CreateCmdStub()
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{
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__asm
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{
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// do xinput!
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push esi
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push ebp
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call XInput::CL_GamepadMove
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add esp, 8h
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// execute code we patched over
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add esp, 4
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fld st
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pop ebx
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// return back
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push 0x5A6DBF
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retn
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}
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}
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__declspec(naked) void XInput::MSG_WriteDeltaUsercmdKeyStub()
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{
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__asm
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{
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// fix stack pointer
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add esp, 0Ch
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// put both forward move and rightmove values in the movement button
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mov dl, byte ptr [edi+1Ah] // to_forwardMove
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mov dh, byte ptr [edi+1Bh] // to_rightMove
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mov [esp+30h], dx // to_buttons
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mov dl, byte ptr [ebp+1Ah] // from_forwardMove
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mov dh, byte ptr [ebp+1Bh] // from_rightMove
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mov [esp+2Ch], dx // from_buttons
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// return back
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push 0x60E40E
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retn
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}
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}
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void XInput::ApplyMovement(Game::msg_t* msg, int key, Game::usercmd_s* from, Game::usercmd_s* to)
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{
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char forward;
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char right;
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if (Game::MSG_ReadBit(msg))
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{
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short movementBits = static_cast<short>(key ^ Game::MSG_ReadBits(msg, 16));
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forward = static_cast<char>(movementBits);
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right = static_cast<char>(movementBits >> 8);
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}
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else
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{
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forward = from->forwardmove;
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right = from->rightmove;
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}
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to->forwardmove = forward;
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to->rightmove = right;
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}
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__declspec(naked) void XInput::MSG_ReadDeltaUsercmdKeyStub()
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{
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__asm
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{
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push ebx // to
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push ebp // from
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push edi // key
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push esi // msg
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call XInput::ApplyMovement
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add esp, 10h
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// return back
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push 0x4921BF
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ret
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}
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}
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__declspec(naked) void XInput::MSG_ReadDeltaUsercmdKeyStub2()
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{
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__asm
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{
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push ebx // to
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push ebp // from
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push edi // key
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push esi // msg
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call XInput::ApplyMovement
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add esp, 10h
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// return back
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push 3
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push esi
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push 0x492085
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ret
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}
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}
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XInput::XInput()
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{
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// poll xinput devices every client frame
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Utils::Hook(0x486970, XInput::CL_FrameStub, HOOK_JUMP).install()->quick();
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// use the xinput state when creating a usercmd
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Utils::Hook(0x5A6DB9, XInput::CL_CreateCmdStub, HOOK_JUMP).install()->quick();
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// package the forward and right move components in the move buttons
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Utils::Hook(0x60E38D, XInput::MSG_WriteDeltaUsercmdKeyStub, HOOK_JUMP).install()->quick();
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// send two bytes for sending movement data
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Utils::Hook::Set<BYTE>(0x60E501, 16);
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Utils::Hook::Set<BYTE>(0x60E5CD, 16);
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// make sure to parse the movement data properally and apply it
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Utils::Hook(0x492127, XInput::MSG_ReadDeltaUsercmdKeyStub, HOOK_JUMP).install()->quick();
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Utils::Hook(0x492009, XInput::MSG_ReadDeltaUsercmdKeyStub2, HOOK_JUMP).install()->quick();
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}
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}
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