gzdoom-gles/src/win32/i_input.cpp

/*
** i_input.cpp
** Handles input from keyboard, mouse, and joystick
**
**---------------------------------------------------------------------------
** Copyright 1998-2009 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/

// DI3 only supports up to 4 mouse buttons, and I want the joystick to
// be read using DirectInput instead of winmm.

#define DIRECTINPUT_VERSION 0x800
#if !defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0501)
#define _WIN32_WINNT 0x0501			// Support the mouse wheel and session notification.
#endif

#define WIN32_LEAN_AND_MEAN
#define __BYTEBOOL__
#ifndef __GNUC__
#define INITGUID
#endif
#include <windows.h>
#include <mmsystem.h>
#include <dinput.h>
#include <malloc.h>

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>

#ifdef _MSC_VER
#pragma warning(disable:4244)
#endif

// Compensate for w32api's lack
#ifndef WM_WTSSESSION_CHANGE
#define WM_WTSSESSION_CHANGE 0x02B1
#define WTS_CONSOLE_CONNECT 1
#define WTS_CONSOLE_DISCONNECT 2
#define WTS_SESSION_LOCK 7
#define WTS_SESSION_UNLOCK 8
#endif
#ifndef PBT_APMSUSPEND
// w32api does not #define the PBT_ macros in winuser.h like the PSDK does
#include <pbt.h>
#endif
#ifndef GET_RAWINPUT_CODE_WPARAM
#define GET_RAWINPUT_CODE_WPARAM(wParam)	((wParam) & 0xff)
#endif


#define USE_WINDOWS_DWORD
#include "c_dispatch.h"
#include "doomtype.h"
#include "doomdef.h"
#include "doomstat.h"
#include "m_argv.h"
#include "i_input.h"
#include "v_video.h"
#include "i_sound.h"
#include "m_menu.h"
#include "g_game.h"
#include "d_main.h"
#include "d_gui.h"
#include "c_console.h"
#include "c_cvars.h"
#include "i_system.h"
#include "s_sound.h"
#include "m_misc.h"
#include "gameconfigfile.h"
#include "win32iface.h"
#include "templates.h"
#include "cmdlib.h"
#include "d_event.h"
#include "v_text.h"

// Prototypes and declarations.
#include "rawinput.h"
// Definitions
#define RIF(name, ret, args) \
	name##Proto My##name;
#include "rawinput.h"



#ifdef _DEBUG
#define INGAME_PRIORITY_CLASS	NORMAL_PRIORITY_CLASS
#else
//#define INGAME_PRIORITY_CLASS	HIGH_PRIORITY_CLASS
#define INGAME_PRIORITY_CLASS	NORMAL_PRIORITY_CLASS
#endif

static void FindRawInputFunctions();
BOOL DI_InitJoy (void);

extern HINSTANCE g_hInst;
extern DWORD SessionID;

extern void ShowEAXEditor ();
extern bool SpawnEAXWindow;

static HMODULE DInputDLL;

bool GUICapture;
extern FMouse *Mouse;
extern FKeyboard *Keyboard;

bool VidResizing;

extern bool SpawnEAXWindow;
extern BOOL vidactive;
extern HWND Window, ConWindow;
extern HWND EAXEditWindow;

EXTERN_CVAR (String, language)
EXTERN_CVAR (Bool, lookstrafe)
EXTERN_CVAR (Bool, use_joystick)

static int WheelDelta;

extern BOOL paused;
static bool noidle = false;

LPDIRECTINPUT8			g_pdi;
LPDIRECTINPUT			g_pdi3;


BOOL AppActive = TRUE;
int SessionState = 0;

CVAR (Bool, k_allowfullscreentoggle, true, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)

extern int chatmodeon;

static void I_CheckGUICapture ()
{
	bool wantCapt;

	if (menuactive == MENU_Off)
	{
		wantCapt = ConsoleState == c_down || ConsoleState == c_falling || chatmodeon;
	}
	else
	{
		wantCapt = (menuactive == MENU_On || menuactive == MENU_OnNoPause);
	}

	if (wantCapt != GUICapture)
	{
		GUICapture = wantCapt;
		if (wantCapt && Keyboard != NULL)
		{
			Keyboard->AllKeysUp();
		}
	}
}

bool GUIWndProcHook(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, LRESULT *result)
{
	event_t ev = { EV_GUI_Event };

	*result = 0;

	switch (message)
	{
	case WM_KEYDOWN:
	case WM_SYSKEYDOWN:
	case WM_KEYUP:
	case WM_SYSKEYUP:
		if (message == WM_KEYUP || message == WM_SYSKEYUP)
		{
			ev.subtype = EV_GUI_KeyUp;
		}
		else
		{
			ev.subtype = (lParam & 0x40000000) ? EV_GUI_KeyRepeat : EV_GUI_KeyDown;
		}
		if (GetKeyState(VK_SHIFT) & 0x8000)		ev.data3 |= GKM_SHIFT;
		if (GetKeyState(VK_CONTROL) & 0x8000)	ev.data3 |= GKM_CTRL;
		if (GetKeyState(VK_MENU) & 0x8000)		ev.data3 |= GKM_ALT;
		if ( (ev.data1 = MapVirtualKey(wParam, 2)) )
		{
			D_PostEvent(&ev);
		}
		else
		{
			switch (wParam)
			{
			case VK_PRIOR:	ev.data1 = GK_PGUP;		break;
			case VK_NEXT:	ev.data1 = GK_PGDN;		break;
			case VK_END:	ev.data1 = GK_END;		break;
			case VK_HOME:	ev.data1 = GK_HOME;		break;
			case VK_LEFT:	ev.data1 = GK_LEFT;		break;
			case VK_RIGHT:	ev.data1 = GK_RIGHT;	break;
			case VK_UP:		ev.data1 = GK_UP;		break;
			case VK_DOWN:	ev.data1 = GK_DOWN;		break;
			case VK_DELETE:	ev.data1 = GK_DEL;		break;
			case VK_ESCAPE:	ev.data1 = GK_ESCAPE;	break;
			case VK_F1:		ev.data1 = GK_F1;		break;
			case VK_F2:		ev.data1 = GK_F2;		break;
			case VK_F3:		ev.data1 = GK_F3;		break;
			case VK_F4:		ev.data1 = GK_F4;		break;
			case VK_F5:		ev.data1 = GK_F5;		break;
			case VK_F6:		ev.data1 = GK_F6;		break;
			case VK_F7:		ev.data1 = GK_F7;		break;
			case VK_F8:		ev.data1 = GK_F8;		break;
			case VK_F9:		ev.data1 = GK_F9;		break;
			case VK_F10:	ev.data1 = GK_F10;		break;
			case VK_F11:	ev.data1 = GK_F11;		break;
			case VK_F12:	ev.data1 = GK_F12;		break;
			}
			if (ev.data1 != 0)
			{
				D_PostEvent(&ev);
			}
		}
		// Return false for key downs so that we can handle special hotkeys
		// in the main WndProc.
		return ev.subtype == EV_GUI_KeyUp;

	case WM_CHAR:
	case WM_SYSCHAR:
		if (wParam >= ' ')		// only send displayable characters
		{
			ev.subtype = EV_GUI_Char;
			ev.data1 = wParam;
			ev.data2 = (message == WM_SYSCHAR);
			D_PostEvent(&ev);
			return true;
		}
		break;

	case WM_LBUTTONDOWN:
	case WM_LBUTTONUP:
	case WM_RBUTTONDOWN:
	case WM_RBUTTONUP:
	case WM_MBUTTONDOWN:
	case WM_MBUTTONUP:
		if (message >= WM_LBUTTONDOWN && message <= WM_LBUTTONDBLCLK)
		{
			ev.subtype = message - WM_LBUTTONDOWN + EV_GUI_LButtonDown;
		}
		else if (message >= WM_RBUTTONDOWN && message <= WM_RBUTTONDBLCLK)
		{
			ev.subtype = message - WM_RBUTTONDOWN + EV_GUI_RButtonDown;
		}
		else if (message >= WM_MBUTTONDOWN && message <= WM_MBUTTONDBLCLK)
		{
			ev.subtype = message - WM_MBUTTONDOWN + EV_GUI_MButtonDown;
		}
		D_PostEvent(&ev);
		return true;

	// Note: If the mouse is grabbed, it sends the mouse wheel events itself.
	case WM_MOUSEWHEEL:
		if (wParam & MK_SHIFT)				ev.data3 |= GKM_SHIFT;
		if (wParam & MK_CONTROL)			ev.data3 |= GKM_CTRL;
		if (GetKeyState(VK_MENU) & 0x8000)	ev.data3 |= GKM_ALT;
		WheelDelta += (SHORT)HIWORD(wParam);
		if (WheelDelta < 0)
		{
			ev.subtype = EV_GUI_WheelDown;
			while (WheelDelta <= -WHEEL_DELTA)
			{
				D_PostEvent(&ev);
				WheelDelta += WHEEL_DELTA;
			}
		}
		else
		{
			ev.subtype = EV_GUI_WheelUp;
			while (WheelDelta >= WHEEL_DELTA)
			{
				D_PostEvent(&ev);
				WheelDelta -= WHEEL_DELTA;
			}
		}
		return true;
	}
	return false;
}

bool CallHook(FInputDevice *device, HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, LRESULT *result)
{
	if (device == NULL)
	{
		return false;
	}
	*result = 0;
	return device->WndProcHook(hWnd, message, wParam, lParam, result);
}

LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	LRESULT result;

	if (message == WM_INPUT)
	{
		if (MyGetRawInputData != NULL)
		{
			UINT size;

			if (!MyGetRawInputData((HRAWINPUT)lParam, RID_INPUT, NULL, &size, sizeof(RAWINPUTHEADER)) &&
				size != 0)
			{
				BYTE *buffer = (BYTE *)alloca(size);
				if (MyGetRawInputData((HRAWINPUT)lParam, RID_INPUT, buffer, &size, sizeof(RAWINPUTHEADER)) == size)
				{
					int code = GET_RAWINPUT_CODE_WPARAM(wParam);
					if (Keyboard == NULL || !Keyboard->ProcessRawInput((RAWINPUT *)buffer, code))
					{
						if (Mouse != NULL)
						{
							Mouse->ProcessRawInput((RAWINPUT *)buffer, code);
						}
					}
				}
			}
		}
		return DefWindowProc(hWnd, message, wParam, lParam);
	}

	if (CallHook(Keyboard, hWnd, message, wParam, lParam, &result))
	{
		return result;
	}
	if (CallHook(Mouse, hWnd, message, wParam, lParam, &result))
	{
		return result;
	}
	for (int i = 0; i < NUM_JOYDEVICES; ++i)
	{
		if (CallHook(JoyDevices[i], hWnd, message, wParam, lParam, &result))
		{
			return result;
		}
	}
	if (GUICapture && GUIWndProcHook(hWnd, message, wParam, lParam, &result))
	{
		return result;
	}

	switch (message)
	{
	case WM_DESTROY:
		SetPriorityClass (GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
		//PostQuitMessage (0);
		exit (0);
		break;

	case WM_HOTKEY:
		break;

	case WM_PAINT:
		if (screen != NULL && 0)
		{
			static_cast<BaseWinFB *> (screen)->PaintToWindow ();
		}
		return DefWindowProc (hWnd, message, wParam, lParam);

	case WM_SETTINGCHANGE:
		// If regional settings were changed, reget preferred languages
		if (wParam == 0 && lParam != 0 && strcmp ((const char *)lParam, "intl") == 0)
		{
			language.Callback ();
		}
		return 0;

	case WM_KILLFOCUS:
		I_CheckNativeMouse (true);	// Make sure mouse gets released right away
		break;

	case WM_SETFOCUS:
		I_CheckNativeMouse (false);
		break;

	case WM_SIZE:
		InvalidateRect (Window, NULL, FALSE);
		break;

	case WM_KEYDOWN:
		// When the EAX editor is open, pressing Ctrl+Tab will switch to it
		if (EAXEditWindow != 0 && wParam == VK_TAB && !(lParam & 0x40000000) &&
			(GetKeyState (VK_CONTROL) & 0x8000))
		{
			SetForegroundWindow (EAXEditWindow);
		}
		break;

	case WM_SYSKEYDOWN:
		// Pressing Alt+Enter can toggle between fullscreen and windowed.
		if (wParam == VK_RETURN && k_allowfullscreentoggle && !(lParam & 0x40000000))
		{
			ToggleFullscreen = !ToggleFullscreen;
		}
		break;

	case WM_SYSCOMMAND:
		// Prevent activation of the window menu with Alt+Space
		if ((wParam & 0xFFF0) != SC_KEYMENU)
		{
			return DefWindowProc (hWnd, message, wParam, lParam);
		}
		break;

	case WM_DISPLAYCHANGE:
		if (SpawnEAXWindow)
		{
			SpawnEAXWindow = false;
			ShowEAXEditor ();
		}
		break;

	case WM_GETMINMAXINFO:
		if (screen && !VidResizing)
		{
			LPMINMAXINFO mmi = (LPMINMAXINFO)lParam;
			mmi->ptMinTrackSize.x = SCREENWIDTH + GetSystemMetrics (SM_CXSIZEFRAME) * 2;
			mmi->ptMinTrackSize.y = SCREENHEIGHT + GetSystemMetrics (SM_CYSIZEFRAME) * 2 +
									GetSystemMetrics (SM_CYCAPTION);
			return 0;
		}
		break;

	case WM_ACTIVATEAPP:
		AppActive = wParam;
		if (wParam)
		{
			SetPriorityClass (GetCurrentProcess (), INGAME_PRIORITY_CLASS);
		}
		else if (!noidle && !netgame)
		{
			SetPriorityClass (GetCurrentProcess (), IDLE_PRIORITY_CLASS);
		}
		S_SetSoundPaused (wParam);
		break;

	case WM_WTSSESSION_CHANGE:
	case WM_POWERBROADCAST:
		{
			int oldstate = SessionState;

			if (message == WM_WTSSESSION_CHANGE && lParam == (LPARAM)SessionID)
			{
#ifdef _DEBUG
				OutputDebugString ("SessionID matched\n");
#endif
				// When using fast user switching, XP will lock a session before
				// disconnecting it, and the session will be unlocked before reconnecting it.
				// For our purposes, video output will only happen when the session is
				// both unlocked and connected (that is, SessionState is 0).
				switch (wParam)
				{
				case WTS_SESSION_LOCK:
					SessionState |= 1;
					break;
				case WTS_SESSION_UNLOCK:
					SessionState &= ~1;
					break;
				case WTS_CONSOLE_DISCONNECT:
					SessionState |= 2;
					//I_MovieDisableSound ();
					break;
				case WTS_CONSOLE_CONNECT:
					SessionState &= ~2;
					//I_MovieResumeSound ();
					break;
				}
			}
			else if (message == WM_POWERBROADCAST)
			{
				switch (wParam)
				{
				case PBT_APMSUSPEND:
					SessionState |= 4;
					break;
				case PBT_APMRESUMESUSPEND:
					SessionState &= ~4;
					break;
				}
			}

			if (GSnd != NULL)
			{
#if 0
				// Do we actually need this here?
				if (!oldstate && SessionState)
				{
					GSnd->SuspendSound ();
				}
				else if (oldstate && !SessionState)
				{
					GSnd->MovieResumeSound ();
				}
#endif
			}
#ifdef _DEBUG
			char foo[256];
			mysnprintf (foo, countof(foo), "Session Change: %ld %d\n", lParam, wParam);
			OutputDebugString (foo);
#endif
		}
		break;

	case WM_PALETTECHANGED:
		if ((HWND)wParam == Window)
			break;
		if (screen != NULL)
		{
			screen->PaletteChanged ();
		}
		return DefWindowProc (hWnd, message, wParam, lParam);

	case WM_QUERYNEWPALETTE:
		if (screen != NULL)
		{
			return screen->QueryNewPalette ();
		}
		return DefWindowProc (hWnd, message, wParam, lParam);

	case WM_ERASEBKGND:
		return true;

	default:
		return DefWindowProc (hWnd, message, wParam, lParam);
	}

	return 0;
}

bool I_InitInput (void *hwnd)
{
	HRESULT hr;

	Printf ("I_InitInput\n");
	atterm (I_ShutdownInput);

	noidle = !!Args->CheckParm ("-noidle");
	g_pdi = NULL;
	g_pdi3 = NULL;

	FindRawInputFunctions();

	// Try for DirectInput 8 first, then DirectInput 3 for NT 4's benefit.
	DInputDLL = LoadLibrary("dinput8.dll");
	if (DInputDLL != NULL)
	{
		typedef HRESULT (WINAPI *blah)(HINSTANCE, DWORD, REFIID, LPVOID *, LPUNKNOWN);
		blah di8c = (blah)GetProcAddress(DInputDLL, "DirectInput8Create");
		if (di8c != NULL)
		{
			hr = di8c(g_hInst, DIRECTINPUT_VERSION, IID_IDirectInput8A, (void **)&g_pdi, NULL);
			if (FAILED(hr))
			{
				Printf(TEXTCOLOR_ORANGE "DirectInput8Create failed: %08lx", hr);
				g_pdi = NULL;	// Just to be sure DirectInput8Create didn't change it
			}
		}
		else
		{
			Printf(TEXTCOLOR_ORANGE "Could not find DirectInput8Create in dinput8.dll\n");
		}
	}

	if (g_pdi == NULL)
	{
		if (DInputDLL != NULL)
		{
			FreeLibrary(DInputDLL);
		}
		DInputDLL = LoadLibrary ("dinput.dll");
		if (DInputDLL == NULL)
		{
			I_FatalError ("Could not load dinput.dll: %08lx", GetLastError());
		}

		typedef HRESULT (WINAPI *blah)(HINSTANCE, DWORD, LPDIRECTINPUT*, LPUNKNOWN);
		blah dic = (blah)GetProcAddress (DInputDLL, "DirectInputCreateA");

		if (dic == NULL)
		{
			I_FatalError ("dinput.dll is corrupt");
		}

		hr = dic (g_hInst, 0x0300, &g_pdi3, NULL);
		if (FAILED(hr))
		{
			I_FatalError ("DirectInputCreate failed: %08lx", hr);
		}
	}

	Printf ("I_StartupMouse\n");
	I_StartupMouse();

	Printf ("I_StartupJoystick\n");
	I_StartupJoystick();

	Printf ("I_StartupKeyboard\n");
	I_StartupKeyboard();

	return TRUE;
}


// Free all input resources
void I_ShutdownInput ()
{
	if (Keyboard != NULL)
	{
		delete Keyboard;
		Keyboard = NULL;
	}
	if (Mouse != NULL)
	{
		delete Mouse;
		Mouse = NULL;
	}
	for (int i = 0; i < NUM_JOYDEVICES; ++i)
	{
		if (JoyDevices[i] != NULL)
		{
			delete JoyDevices[i];
			JoyDevices[i] = NULL;
		}
	}
	if (g_pdi)
	{
		g_pdi->Release ();
		g_pdi = NULL;
	}
	if (g_pdi3)
	{
		g_pdi3->Release ();
		g_pdi3 = NULL;
	}
	if (DInputDLL != NULL)
	{
		FreeLibrary (DInputDLL);
		DInputDLL = NULL;
	}
}

void I_GetEvent ()
{
	MSG mess;

	// Briefly enter an alertable state so that if a secondary thread
	// crashed, we will execute the APC it sent now.
	SleepEx (0, TRUE);

	while (PeekMessage (&mess, NULL, 0, 0, PM_REMOVE))
	{
		if (mess.message == WM_QUIT)
			exit (mess.wParam);
		if (EAXEditWindow == 0 || !IsDialogMessage (EAXEditWindow, &mess))
		{
			TranslateMessage (&mess);
			DispatchMessage (&mess);
		}
	}

	if (Keyboard != NULL)
	{
		Keyboard->ProcessInput();
	}
	if (Mouse != NULL)
	{
		Mouse->ProcessInput();
	}
}

//
// I_StartTic
//
void I_StartTic ()
{
	ResetButtonTriggers ();
	I_CheckGUICapture ();
	I_CheckNativeMouse (false);
	I_GetEvent ();
}

//
// I_StartFrame
//
void I_StartFrame ()
{
	if (use_joystick)
	{
		for (int i = 0; i < NUM_JOYDEVICES; ++i)
		{
			if (JoyDevices[i] != NULL)
			{
				JoyDevices[i]->ProcessInput();
			}
		}
	}
}

void I_GetAxes(float axes[NUM_JOYAXIS])
{
	int i;

	for (i = 0; i < NUM_JOYAXIS; ++i)
	{
		axes[i] = 0;
	}
	if (use_joystick)
	{
		for (i = 0; i < NUM_JOYDEVICES; ++i)
		{
			if (JoyDevices[i] != NULL)
			{
				JoyDevices[i]->AddAxes(axes);
			}
		}
	}
}

void I_PutInClipboard (const char *str)
{
	if (str == NULL || !OpenClipboard (Window))
		return;
	EmptyClipboard ();

	HGLOBAL cliphandle = GlobalAlloc (GMEM_DDESHARE, strlen (str) + 1);
	if (cliphandle != NULL)
	{
		char *ptr = (char *)GlobalLock (cliphandle);
		strcpy (ptr, str);
		GlobalUnlock (cliphandle);
		SetClipboardData (CF_TEXT, cliphandle);
	}
	CloseClipboard ();
}

FString I_GetFromClipboard (bool return_nothing)
{
	FString retstr;
	HGLOBAL cliphandle;
	char *clipstr;
	char *nlstr;

	if (return_nothing || !IsClipboardFormatAvailable (CF_TEXT) || !OpenClipboard (Window))
		return retstr;

	cliphandle = GetClipboardData (CF_TEXT);
	if (cliphandle != NULL)
	{
		clipstr = (char *)GlobalLock (cliphandle);
		if (clipstr != NULL)
		{
			// Convert CR-LF pairs to just LF while copying to the FString
			for (nlstr = clipstr; *nlstr != '\0'; ++nlstr)
			{
				if (nlstr[0] == '\r' && nlstr[1] == '\n')
				{
					nlstr++;
				}
				retstr += *nlstr;
			}
			GlobalUnlock (clipstr);
		}
	}

	CloseClipboard ();
	return retstr;
}

#include "i_movie.h"

CCMD (playmovie)
{
	if (argv.argc() != 2)
	{
		Printf ("Usage: playmovie <movie name>\n");
		return;
	}
	I_PlayMovie (argv[1]);
}

//==========================================================================
//
// FInputDevice - Destructor
//
//==========================================================================

FInputDevice::~FInputDevice()
{
}

//==========================================================================
//
// FInputDevice :: ProcessInput
//
// Gives subclasses an opportunity to do input handling that doesn't involve
// window messages.
//
//==========================================================================

void FInputDevice::ProcessInput()
{
}

//==========================================================================
//
// FInputDevice :: ProcessRawInput
//
// Gives subclasses a chance to handle WM_INPUT messages. This is not part
// of WndProcHook so that we only need to fill the RAWINPUT buffer once
// per message and be sure it gets cleaned up properly.
//
//==========================================================================

bool FInputDevice::ProcessRawInput(RAWINPUT *raw, int code)
{
	return false;
}

//==========================================================================
//
// FInputDevice :: WndProcHook
//
// Gives subclasses a chance to intercept window messages. 
//
//==========================================================================

bool FInputDevice::WndProcHook(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, LRESULT *result)
{
	return false;
}

//==========================================================================
//
// FindRawInputFunctions
//
// Finds functions for raw input, if available.
//
//==========================================================================

static void FindRawInputFunctions()
{
	HMODULE user32 = GetModuleHandle("user32.dll");

	if (user32 == NULL)
	{
		return;		// WTF kind of broken system are we running on?
	}
#define RIF(name,ret,args) \
	My##name = (name##Proto)GetProcAddress(user32, #name);
#include "rawinput.h"
}