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Descent3/ddio_win/winkey.cpp

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/*
* Descent 3
* Copyright (C) 2024 Parallax Software
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* $Logfile: /DescentIII/Main/ddio_win/winkey.cpp $
* $Revision: 36 $
* $Date: 4/24/99 5:41p $
* $Author: Samir $
*
* Keyboard IO with DirectInput 3.0
*
* $Log: /DescentIII/Main/ddio_win/winkey.cpp $
*
* 36 4/24/99 5:41p Samir
* moved key to ascii, ascii to key to the ddio_common library.
*
* 35 4/22/99 2:02a Jeff
* pass ddio_init_info through to keyboard handlers
*
* 34 3/05/99 3:27p Samir
* screenshot key works properly now.
*
* 33 3/02/99 2:01p Samir
* some small directinput changes. (note, for D3, we're now using emulated
* key input because of the silly pause and numlock issue which for some
* reason fails to work properly under DirectInput.
*
* 32 3/01/99 12:39a Samir
* key ups only occur when key was initially down. because of this,
* ddio_KeyFlush cleared the down events, but if the user released after
* flush, the up event would leak through and cause the illusion of key
* presses leaking through. HOPEFULLY this doesn't break anything else,
* but I played through the game a bit and it seems to work fine.
*
* 31 2/25/99 10:43p Matt
* Took out mprintf()
*
* 30 2/21/99 6:38p Samir
* mouse and key input better. buffered mouse.
*
* 29 2/05/99 1:16p Samir
* reset low level keys when flushing keyboard in the high level. added a
* function to the low level to reset the status of a key, called from
* high level key flush.
*
* 28 2/04/99 12:31p Samir
* use our timer for key capture if we're using the hook method.
*
* 27 1/28/99 6:22p Samir
* may fix thread issues.
*
* 26 1/25/99 7:27p Samir
* fixed timing issues with emulated keyboard key down times. (Win32 sends
* multiple keydown messages, so ignore them.)
*
* 25 1/25/99 6:47p Samir
* allow slow keyboard
*
* 24 1/25/99 11:02a Samir
* revamped mouse and key controls.
*
* 23 10/22/98 11:06a Samir
* added numeric keypad ascii translations.
*
* 22 10/21/98 12:02p Samir
* properly update odd keys when they are released throug
* ddio_KeyGetDownTime.
*
* 21 10/16/98 12:15p Samir
* took out ddio_KeyFrame
*
* 20 10/15/98 6:48p Samir
* added timer hooks.
*
* 19 9/17/98 12:50p Samir
* language.
*
* 18 6/29/98 6:43p Samir
* Took out GetMsgProc and legacy keyboard variables.
*
* 17 4/09/98 6:56p Samir
* PRINTSCREEN MUST WORK.
*
* 16 4/08/98 8:40p Samir
* Screen shots work with print screen by checking VK code.
*
* 15 3/31/98 12:46p Samir
* keyboard IO system better. uses getmsgproc windows hook.
*
* 14 3/24/98 11:21a Samir
* redid key handler.
*
* 13 2/25/98 6:11p Samir
* Added functions to better deal with key flushing.
*
* 12 1/21/98 6:46p Samir
* NT and 95 should have same keyboard behavior for framed handlers.
*
* 11 1/02/98 12:52p Samir
* Added ascii->keycode translation tables
*
* 10 12/10/97 1:12p Samir
* Use timestamp from DirectInput Key calls.
*
* 9 11/07/97 6:17p Samir
* Rollbacked some more efficient code since it slowed down some machines
* in the editor. Sleep thread until closed a little faster.
*
* 8 10/23/97 2:59p Samir
* Keyboard thread uses C runtime lib functions, and definitely ends.
*
* 7 10/22/97 4:37p Samir
* Thread doesn't end if thread is still blocking, I think.
*
* 6 10/17/97 5:03p Samir
* Default to preemptive keyboard handler (not under NT).
*
* 5 10/16/97 5:35p Samir
* Use different cooperative level for Win95 vs. NT.
*
* 4 10/16/97 2:29p Samir
* Changed DirectInput Keyboard to FOREGROUND
*
* 3 8/01/97 8:14p Samir
* Fixed keyboard handler for NT to work with extended keys.
*
* 2 8/01/97 7:30p Samir
* Better NT keyboard support.
*
* 14 5/23/97 4:09p Samir
* Keyboard thread uses new task system.
*
* 13 5/09/97 6:45p Samir
* Took out shared keyboard code from handler to ddio_common
*
* 12 5/08/97 1:56p Samir
* Moved a bunch of keyboard code to ddio_common library.
*
* 11 3/20/97 11:08a Samir
* Added function to peek for keys in queue without removing them.
*
* 10 3/13/97 3:02p Samir
* Hopefully fixed keyboard thread problem.
*
* 9 2/20/97 9:58a Matt
* Took out Int3() for directinput key buffer overflow, which would get
* hit if you switched to another task, typed a bunch, and switched back
* into the editor
*
* 8 1/23/97 2:22p Samir
* Keyboard thread now blocks properly, and added functionality for
* nonpreemptive keyboard polling.
*
* 7 1/20/97 3:46p Samir
* RCS header check in
*
* $NoKeywords: $
*/
// ----------------------------------------------------------------------------
// Keyboard Interface
// ----------------------------------------------------------------------------
#include "DDAccess.h"
#include "pserror.h"
#include "mono.h"
#include "ddio.h"
#include "ddio_win.h"
#include "Application.h"
#include "TaskSystem.h"
#include <stdlib.h>
#include <process.h>
// ----------------------------------------------------------------------------
// Local global data
// ----------------------------------------------------------------------------
#define DIKEY_BUFFER_SIZE 32
static struct tWinKeyData {
LPDIRECTINPUTDEVICE lpdikey; // key device
HANDLE evtnotify; // notify event
HHOOK winhook; // windows hook
unsigned long thread; // thread id
// osMutex keyframe_mutex; // mutex between
// internal key frame and key thread.
bool nextframe; // used for mutexing between keyframe and thread.
bool acquired; // device acquired?
bool thread_active; // used in thread.
bool suspended;
} WKD = {NULL, NULL, NULL, 0xffffffff, false, false, false, true};
volatile struct tWinKeys {
union {
DWORD up_ticks; // windows ticks when key went up last
float up_time;
};
union {
DWORD down_ticks; // windows ticks when key went down last
float down_time;
};
bool status; // is it down?
bool mutex_flag; // done for mutexing between ddio_Internal and KeyThread
ushort mutex_data;
} WKeys[DDIO_MAX_KEYS];
static int DDIO_key_language = KBLANG_AMERICAN;
///////////////////////////////////////////////////////////////////////////////
// Initializes DirectInputDevice keyboard if we are under Win9x or at least NT5
// we set the cooperative level, etc.
LPDIRECTINPUTDEVICE dikey_Init(LPDIRECTINPUT lpdi, HWND hwnd);
// Shutsdown DirectInputDevice keyboard if passed device is valid.
void dikey_Shutdown(LPDIRECTINPUTDEVICE lpdikey);
// sets up preemptive keyboard handling.
HANDLE dikey_EnableNotify(LPDIRECTINPUTDEVICE lpdikey);
// disables event based notification.
bool dikey_DisableNotify(LPDIRECTINPUTDEVICE lpdikey, HANDLE evthandle);
// acquires or unacquires device
// returns device acquisition state.
bool dikey_Acquire(LPDIRECTINPUTDEVICE lpdikey, bool acquire);
// emulated keyboard functionality
bool ddio_Win_KeyInit();
void ddio_Win_KeyClose();
int ddio_KeyHandler(HWnd wnd, unsigned msg, unsigned wParam, long lParam);
void CALLBACK key_TimerProc(UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2);
LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam);
// DirectInput Keyboard Thread
void __cdecl dikey_Thread(void *dp);
// translates scan code to foreign equivs.
ubyte xlate_scancode(ubyte scan_code);
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// Initialization of keyboard device.
// ----------------------------------------------------------------------------
// this version will try to initialize a direct input keyboard device. if it fails
// it falls back to the old keyboard hook (less reliable but works.)
bool ddio_InternalKeyInit(ddio_init_info *init_info) {
bool emulated = init_info->key_emulation;
LPDIRECTINPUTDEVICE lpdikey = NULL;
int i;
// reset key list
for (i = 0; i < DDIO_MAX_KEYS; i++) {
WKeys[i].down_ticks = 0;
WKeys[i].up_ticks = 0;
WKeys[i].status = false;
}
// start init.
if (!emulated) {
lpdikey = dikey_Init(DInputData.lpdi, (HWND)DInputData.app->m_hWnd);
}
retry_key_init:
if (lpdikey) {
// direct input keyboard can work, so we initialize preemptive handling of the keyboard
HANDLE hevt = dikey_EnableNotify(lpdikey);
if (hevt) {
// event handling will work, so let's create the keyboard thread.
bool acquired = dikey_Acquire(lpdikey, true);
if (acquired) {
// create keyboard thread
unsigned long thrid;
WKD.thread_active = true;
WKD.lpdikey = lpdikey;
WKD.thread = 0;
WKD.evtnotify = hevt;
WKD.acquired = acquired;
WKD.winhook = NULL;
WKD.suspended = false;
WKD.nextframe = false;
thrid = _beginthread(dikey_Thread, 0, NULL);
if (thrid == (unsigned long)(-1)) {
mprintf((0, "DDIO: DI_Keyboard thread failed to initialize.\n"));
WKD.thread_active = false;
WKD.lpdikey = NULL;
WKD.thread = 0xffffffff;
WKD.evtnotify = NULL;
WKD.acquired = false;
WKD.winhook = NULL;
WKD.suspended = false;
acquired = dikey_Acquire(lpdikey, false);
dikey_DisableNotify(lpdikey, hevt);
dikey_Shutdown(lpdikey);
lpdikey = NULL;
} else {
// success! init data.
// set priority of thread too.
WKD.thread = thrid;
if (SetThreadPriority((HANDLE)thrid, THREAD_PRIORITY_TIME_CRITICAL) == FALSE) {
SetThreadPriority((HANDLE)thrid, THREAD_PRIORITY_HIGHEST);
}
mprintf((0, "DDIO: DI_Keyboard initialized.\n"));
}
} else {
// failed to acquire device? can't do.
dikey_DisableNotify(lpdikey, hevt);
dikey_Shutdown(lpdikey);
lpdikey = NULL;
}
} else {
// somehow event notification failed, can't do.
dikey_Shutdown(lpdikey);
lpdikey = NULL;
}
if (lpdikey == NULL) {
goto retry_key_init;
}
} else {
// here, initialize hook procedure.
return ddio_Win_KeyInit();
}
return true;
}
// this will shutdown direct input or the windows hook, whichever was chosen.
void ddio_InternalKeyClose() {
if (WKD.lpdikey) {
// deactivate thread and free it, then unacquire device, disable event notification, and shutdown!
WKD.thread_active = false;
SetEvent(WKD.evtnotify);
Sleep(500);
WKD.acquired = dikey_Acquire(WKD.lpdikey, false);
dikey_DisableNotify(WKD.lpdikey, WKD.evtnotify);
dikey_Shutdown(WKD.lpdikey);
WKD.thread = 0xffffffff;
WKD.evtnotify = NULL;
WKD.lpdikey = NULL;
mprintf((0, "DDIO: DI_Keyboard shutdown.\n"));
}
if (WKD.winhook) {
ddio_Win_KeyClose();
}
}
// handled internally if keyboard system needs additional processing per frame
void ddio_InternalKeyFrame() {}
//////////////////////////////////////////////////////////////////////////////
// Miscellaneous API
//////////////////////////////////////////////////////////////////////////////
// returns if key is up or down
bool ddio_InternalKeyState(ubyte key) { return WKeys[key].status; }
float ddio_InternalKeyDownTime(ubyte key) {
float down_time = 0.0f;
if (WKeys[key].status) {
if (WKD.winhook) {
float timer = timer_GetTime();
down_time = timer - WKeys[key].down_time;
WKeys[key].down_time = timer;
} else {
DWORD curtickcount = GetTickCount();
DWORD ticks = curtickcount - WKeys[key].down_ticks;
if (ticks == 0) {
// mprintf((0, "ticks=%d\n", ticks));
}
WKeys[key].down_ticks = curtickcount;
down_time = (ticks / 1000.0f);
}
} else {
if (WKD.winhook) {
down_time = WKeys[key].up_time - WKeys[key].down_time;
WKeys[key].down_time = WKeys[key].up_time = 0.0f;
} else {
DWORD ticks = WKeys[key].up_ticks - WKeys[key].down_ticks;
WKeys[key].down_ticks = 0;
WKeys[key].up_ticks = 0;
down_time = (ticks / 1000.0f);
}
}
return down_time;
}
// flush a key internally
void ddio_InternalResetKey(ubyte key) {
WKeys[key].down_ticks = 0;
WKeys[key].up_ticks = 0;
WKeys[key].status = false;
WKeys[key].mutex_flag = false;
WKeys[key].mutex_data = 0;
}
// sets type of keyboard to emulate
// #define KBLANG_AMERICAN 0
// #define KBLANG_BRITISH 1
// #define KBLANG_FRENCH 2
// #define KBLANG_GERMAN 3
void ddio_SetKeyboardLanguage(int language) { DDIO_key_language = language; }
// translates scan code to foreign equivs.
ubyte xlate_scancode(ubyte scan_code) {
ubyte code = scan_code;
if (DDIO_key_language == KBLANG_FRENCH) {
switch (scan_code) {
case KEY_A:
code = KEY_Q;
break;
case KEY_M:
code = KEY_COMMA;
break;
case KEY_Q:
code = KEY_A;
break;
case KEY_W:
code = KEY_Z;
break;
case KEY_Z:
code = KEY_W;
break;
case KEY_SEMICOL:
code = KEY_M;
break;
case KEY_COMMA:
code = KEY_SEMICOL;
break;
}
} else if (DDIO_key_language == KBLANG_GERMAN) {
switch (scan_code) {
case KEY_Y:
code = KEY_Z;
break;
case KEY_Z:
code = KEY_Y;
break;
}
} else if (DDIO_key_language == KBLANG_BRITISH) {
if (scan_code == KEY_BSLASH_UK) { // KEY_SLASH_UK == 0x56
code = KEY_SLASH; // KEY_SLASH is really the backslash, 0x2B
}
}
return code;
}
//////////////////////////////////////////////////////////////////////////////
// DirectInput Functions
//////////////////////////////////////////////////////////////////////////////
inline bool IS_NT4_OR_LOWER() {
int maj, min;
tWin32OS os = oeWin32Application::version(&maj, &min);
return (os == WinNT && maj < 5) ? true : false;
}
// Initializes DirectInputDevice keyboard if we are under Win9x or at least NT5
// we set the cooperative level, etc.
LPDIRECTINPUTDEVICE dikey_Init(LPDIRECTINPUT lpdi, HWND hwnd) {
LPDIRECTINPUTDEVICE lpdikey;
HRESULT hr;
if (IS_NT4_OR_LOWER()) {
return NULL;
}
// see if we can get the keyboard device.
hr = lpdi->CreateDevice(GUID_SysKeyboard, &lpdikey, NULL);
if (hr != DI_OK) {
DDIO_MESSAGE((hr, "DI_Keyboard initialization failed."));
return NULL;
}
hr = lpdikey->SetDataFormat(&c_dfDIKeyboard);
if (hr != DI_OK) {
DDIO_MESSAGE((hr, "DI_Keyboard data format specification failed."));
lpdikey->Release();
return NULL;
}
hr = lpdikey->SetCooperativeLevel(hwnd, DISCL_NONEXCLUSIVE | DISCL_BACKGROUND);
if (hr != DI_OK) {
DDIO_MESSAGE((hr, "DI_Keyboard set cooperative level failed."));
lpdikey->Release();
return NULL;
}
return lpdikey;
}
// Shutsdown DirectInputDevice keyboard if passed device is valid.
void dikey_Shutdown(LPDIRECTINPUTDEVICE lpdikey) {
if (lpdikey) {
lpdikey->Release();
}
}
// sets up preemptive keyboard handling.
HANDLE dikey_EnableNotify(LPDIRECTINPUTDEVICE lpdikey) {
if (lpdikey) {
HANDLE hEvt = CreateEvent(NULL, TRUE, FALSE, "DDIOKeyEvent");
HRESULT hr;
DIPROPDWORD dipropdw = {
{
sizeof(DIPROPDWORD),
sizeof(DIPROPHEADER),
0,
DIPH_DEVICE,
},
DIKEY_BUFFER_SIZE,
};
if (!hEvt) {
DDIO_MESSAGE((0, "DI_Keyboard failed to init system event."));
return NULL;
}
// set event
hr = lpdikey->SetEventNotification(hEvt);
if (hr != DI_OK) {
DDIO_MESSAGE((hr, "DI_Keyboard failed to set preemptive key event notification."));
CloseHandle(hEvt);
return NULL;
}
// set key buffer size
hr = lpdikey->SetProperty(DIPROP_BUFFERSIZE, &dipropdw.diph);
if (FAILED(hr)) {
DDIO_MESSAGE((hr, "DI_keyboard buffering failed."));
lpdikey->SetEventNotification(NULL);
CloseHandle(hEvt);
return NULL;
}
return hEvt;
}
return NULL;
}
// disables event based notification.
bool dikey_DisableNotify(LPDIRECTINPUTDEVICE lpdikey, HANDLE evthandle) {
if (lpdikey) {
lpdikey->SetEventNotification(NULL);
CloseHandle(evthandle);
return true;
}
return false;
}
// acquires or unacquires device
// returns device acquisition state.
bool dikey_Acquire(LPDIRECTINPUTDEVICE lpdikey, bool acquire) {
HRESULT hr = acquire ? lpdikey->Acquire() : lpdikey->Unacquire();
if (FAILED(hr)) {
DDIO_MESSAGE((hr, "DI_keyboard acquire/unacquire fail."));
return !acquire;
}
return acquire;
}
// DirectInput Keyboard Thread
void __cdecl dikey_Thread(void *dp) {
unsigned event_count = 0;
GetAsyncKeyState(VK_PAUSE); // this will tell if the 'pause' key is toggled
while (WKD.thread_active) {
// this thread will hold until the direct input key event has been signaled by the OS.
// after this, we will get all the keys in the io buffer and register them with the
// key system.
switch (WaitForSingleObject(WKD.evtnotify, INFINITE)) {
case WAIT_TIMEOUT: // this shouldn't happen, but if it does, no big deal.
break;
case WAIT_ABANDONED: // usually means calling thread quit.
WKD.thread_active = false;
break;
case WAIT_OBJECT_0: // event was signalled normally
{
DIDEVICEOBJECTDATA diobjdata[DIKEY_BUFFER_SIZE];
DWORD diobjitems = DIKEY_BUFFER_SIZE;
HRESULT hr;
// SHORT async_key_state;
ubyte key;
int i;
// don't read if suspended!
if (WKD.suspended) {
break;
}
event_count++;
// attempt acquisition if keyboard not already acquired
if (!WKD.acquired) {
WKD.acquired = dikey_Acquire(WKD.lpdikey, true);
}
if (WKD.acquired) {
hr = WKD.lpdikey->GetDeviceData(sizeof(DIDEVICEOBJECTDATA), diobjdata, &diobjitems, 0);
if (SUCCEEDED(hr)) {
// the pause is key under Windows seems to act kinda strange. it's a toggle button
// and USUALLY is preceeded by a KEY_LCTRL press. If a pause toggle was indicated, flush the
// keyboard and quit.
// note that dwOfs is the acutal key that is either down or up, and dwData tells us if
// it is up or down. So place on key array, and in queue.
for (i = 0; i < (int)diobjitems; i++) {
key = xlate_scancode((ubyte)(diobjdata[i].dwOfs));
if (diobjdata[i].dwData & 0x80) {
if (WKeys[key].status) {
WKeys[key].up_ticks = 0;
}
WKeys[key].down_ticks = diobjdata[i].dwTimeStamp;
WKeys[key].status = true;
if (key == KEY_LCTRL) {
WKeys[key].mutex_flag = true;
}
mprintf((0, "dkey=%x\n", key));
} else {
if (WKeys[key].status) {
WKeys[key].up_ticks = diobjdata[i].dwTimeStamp;
WKeys[key].status = false;
mprintf((0, "ukey=%x\n", key));
}
}
ddio_UpdateKeyState(key, WKeys[key].status);
}
} else {
if (hr == DIERR_INPUTLOST) {
WKD.acquired = dikey_Acquire(WKD.lpdikey, true);
} else {
DDIO_MESSAGE((hr, "DI_keyboard unable to read."));
}
}
}
} break;
}
ResetEvent(WKD.evtnotify);
}
DDIO_MESSAGE((0, "DI_Keyboard thread ended."));
}
void ddio_InternalKeySuspend() {
if (WKD.lpdikey && WKD.acquired) {
WKD.acquired = dikey_Acquire(WKD.lpdikey, false);
}
WKD.suspended = true;
}
void ddio_InternalKeyResume() {
if (WKD.lpdikey && !WKD.acquired) {
WKD.acquired = dikey_Acquire(WKD.lpdikey, true);
}
WKD.suspended = false;
}
// Win32 non-threaded version
bool ddio_Win_KeyInit() {
/* Initialize hook handlers */
WKD.winhook = SetWindowsHookEx(WH_KEYBOARD, (HOOKPROC)KeyboardProc, (HINSTANCE)DInputData.app->m_hInstance,
GetCurrentThreadId());
if (!WKD.winhook) {
return false;
}
mprintf((0, "Keyboard initialized.\n"));
return true;
}
void ddio_Win_KeyClose() {
/* Free up message handlers */
if (WKD.winhook) {
UnhookWindowsHookEx(WKD.winhook);
WKD.winhook = NULL;
}
mprintf((0, "Keyboard released.\n"));
}
// ----------------------------------------------------------------------------
// non DirectInput keyboard handler
// ----------------------------------------------------------------------------
LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam) {
int res;
if (code < 0) {
return CallNextHookEx(WKD.winhook, code, wParam, lParam);
}
if (lParam & 0x80000000)
res = ddio_KeyHandler(0, WM_KEYUP, wParam, lParam);
else
res = ddio_KeyHandler(0, WM_KEYDOWN, wParam, lParam);
return (!res);
}
int ddio_KeyHandler(HWnd wnd, unsigned msg, unsigned wParam, long lParam) {
ubyte scan_code;
float timer = timer_GetTime();
if (!WKD.winhook)
return 1;
switch ((UINT)msg) {
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
scan_code = (unsigned char)((lParam >> 16) & 0xff);
if (lParam & 0x01000000)
scan_code |= 0x80;
scan_code = xlate_scancode(scan_code);
// print screen is a weird case. only accept key ups.
if (wParam != VK_SNAPSHOT) {
if (!WKeys[scan_code].status) {
WKeys[scan_code].up_time = 0;
WKeys[scan_code].down_time = timer;
} else {
WKeys[scan_code].up_time = 0;
}
WKeys[scan_code].status = true;
ddio_UpdateKeyState(scan_code, true);
}
break;
case WM_KEYUP:
case WM_SYSKEYUP:
scan_code = (unsigned char)((lParam >> 16) & 0xff);
if (lParam & 0x01000000)
scan_code |= 0x80;
scan_code = xlate_scancode(scan_code);
// handle special keys. print screen, we will simulate the keypress.
if (wParam == VK_SNAPSHOT) {
scan_code = KEY_PRINT_SCREEN;
WKeys[scan_code].down_time = timer;
WKeys[scan_code].status = true;
ddio_UpdateKeyState(scan_code, true);
}
if (WKeys[scan_code].status) {
WKeys[scan_code].status = false;
WKeys[scan_code].up_time = timer;
ddio_UpdateKeyState(scan_code, false);
}
break;
}
return 1;
}
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