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i_input.pas
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i_input.pas
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//------------------------------------------------------------------------------
//
// DoomXS - A basic Windows source port of Doom
// based on original Linux Doom as published by "id Software"
// Copyright (C) 1993-1996 by id Software, Inc.
// Copyright (C) 2021-2022 by Jim Valavanis
//
// 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 2
// 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, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//------------------------------------------------------------------------------
// Site: https://sourceforge.net/projects/doomxs/
//------------------------------------------------------------------------------
unit i_input;
interface
procedure I_InitInput;
procedure I_ProcessInput;
procedure I_ShutDownInput;
procedure I_SynchronizeInput(active: boolean);
function I_GetCapsLock: boolean;
procedure I_SetCapsLock(const bState: boolean);
implementation
uses
Windows,
d_delphi,
MMSystem, // For joystick support
doomdef,
d_event,
d_main,
i_main,
i_system;
function TranslateKey(keycode: integer): integer;
begin
case keycode of
VK_LEFT, VK_NUMPAD4: Result := KEY_LEFTARROW;
VK_RIGHT, VK_NUMPAD6: Result := KEY_RIGHTARROW;
VK_DOWN, VK_NUMPAD2: Result := KEY_DOWNARROW;
VK_UP, VK_NUMPAD8: Result := KEY_UPARROW;
VK_ESCAPE: Result := KEY_ESCAPE;
VK_RETURN: Result := KEY_ENTER;
VK_TAB: Result := KEY_TAB;
VK_SNAPSHOT: result := KEY_PRNT;
VK_F1: Result := KEY_F1;
VK_F2: Result := KEY_F2;
VK_F3: Result := KEY_F3;
VK_F4: Result := KEY_F4;
VK_F5: Result := KEY_F5;
VK_F6: Result := KEY_F6;
VK_F7: Result := KEY_F7;
VK_F8: Result := KEY_F8;
VK_F9: Result := KEY_F9;
VK_F10: Result := KEY_F10;
VK_F11: Result := KEY_F11;
VK_F12: Result := KEY_F12;
189: Result := KEY_MINUS;
187: Result := KEY_EQUALS;
VK_BACK: Result := KEY_BACKSPACE;
VK_PAUSE: Result := KEY_PAUSE;
VK_NUMPAD3: Result := KEY_PAGEDOWN;
VK_NUMPAD9: Result := KEY_PAGEUP;
VK_NUMPAD0: Result := KEY_INS;
else
if (keycode >= Ord('A')) and (keycode <= Ord('Z')) then
Result := Ord(tolower(Chr(keycode)))
else if keycode < 128 then
Result := keycode
else
Result := 0;
end;
end;
function TranslateSysKey(keycode: integer): integer;
begin
case keycode of
VK_SHIFT: Result := KEY_RSHIFT;
VK_CONTROL: Result := KEY_RCTRL;
VK_MENU: Result := KEY_RALT;
else
Result := 0;
end;
end;
var
curkeys: PKeyboardState;
oldkeys: PKeyboardState;
// Mouse support
mlastx,
mlasty: integer;
mflags: byte;
// Joystick support
jInfo: TJoyInfoEx;
jPresent: boolean;
jwXpos: UINT;
jwYpos: UINT;
type
setcursorposfunc_t = function(x, y:Integer): BOOL; stdcall;
getcursorposfunc_t = function(var lpPoint: TPoint): BOOL; stdcall;
var
getcursorposfunc: getcursorposfunc_t;
setcursorposfunc: setcursorposfunc_t;
user32inst: THandle;
procedure I_InitMouse;
begin
user32inst := LoadLibrary(user32);
getcursorposfunc := GetProcAddress(user32inst, 'GetPhysicalCursorPos');
if not assigned(getcursorposfunc) then
getcursorposfunc := GetProcAddress(user32inst, 'GetCursorPos');
setcursorposfunc := GetProcAddress(user32inst, 'SetPhysicalCursorPos');
if not assigned(setcursorposfunc) then
setcursorposfunc := GetProcAddress(user32inst, 'SetCursorPos');
end;
procedure I_ShutDownMouse;
begin
FreeLibrary(user32inst);
end;
procedure I_ResetMouse;
begin
mlastx := SCREENWIDTH div 2;
mlasty := SCREENHEIGHT div 2;
setcursorposfunc(mlastx, mlasty);
mflags := 0;
end;
procedure I_InitInput;
begin
curkeys := malloc(SizeOf(TKeyboardState));
oldkeys := malloc(SizeOf(TKeyboardState));
I_InitMouse;
I_ResetMouse;
printf(' Mouse initialized'#13#10);
jPresent := joyGetNumDevs > 0;
if jPresent then
jPresent := joySetCapture(hMainWnd, JOYSTICKID1, 0, False) = JOYERR_NOERROR;
// Get initial joystic position
if jPresent then
begin
ZeroMemory(@jInfo, SizeOf(TJoyInfoEx));
jInfo.dwSize := SizeOf(TJoyInfoEx);
jInfo.dwFlags := JOY_RETURNALL;
if joyGetPosEx(JOYSTICKID1, @jInfo) = JOYERR_NOERROR then
begin
jwXpos := jInfo.wXpos;
jwYpos := jInfo.wYpos;
end;
printf(' Joystick initialized'#13#10);
end
else
printf(' Joystick not found'#13#10);
end;
procedure I_ShutDownInput;
begin
FreeMem(curkeys);
FreeMem(oldkeys);
joyReleaseCapture(JOYSTICKID1);
I_ShutDownMouse;
end;
var
input_active: boolean;
procedure I_ProcessInput;
var
i: integer;
ev: event_t;
key: integer;
p: PKeyboardState;
pt: TPoint;
begin
if I_GameFinished or not input_active then
Exit;
GetKeyboardState(curkeys^);
ZeroMemory(@ev, SizeOf(ev));
for i := 0 to SizeOf(curkeys^) - 1 do
begin
if (oldkeys[i] and $80) <> (curkeys[i] and $80) then
begin
key := TranslateKey(i);
if key <> 0 then
begin
if curkeys[i] and $80 <> 0 then
ev.typ := ev_keydown
else
ev.typ := ev_keyup;
ev.data1 := key;
D_PostEvent(@ev);
end;
key := TranslateSysKey(i);
if key <> 0 then
begin
if curkeys[i] and $80 <> 0 then
ev.typ := ev_keydown
else
ev.typ := ev_keyup;
ev.data1 := key;
D_PostEvent(@ev);
end;
end;
end;
p := oldkeys;
oldkeys := curkeys;
curkeys := p;
// Mouse
if GetKeyState(VK_LBUTTON) < 0 then
mflags := mflags or 1;
if GetKeyState(VK_RBUTTON) < 0 then
mflags := mflags or 2;
if GetKeyState(VK_MBUTTON) < 0 then
mflags := mflags or 4;
getcursorposfunc(pt);
ev.typ := ev_mouse;
ev.data1 := mflags;
ev.data2 := mlastx - pt.x;
ev.data3 := mlasty - pt.y;
D_PostEvent(@ev);
I_ResetMouse;
// Joystick
if jPresent then
begin
ZeroMemory(@jInfo, SizeOf(TJoyInfoEx));
jInfo.dwSize := SizeOf(TJoyInfoEx);
jInfo.dwFlags := JOY_RETURNALL;
if joyGetPosEx(JOYSTICKID1, @jInfo) = JOYERR_NOERROR then
begin
ev.typ := ev_joystick;
if jInfo.dwButtonNumber > 0 then
ev.data1 := jInfo.wButtons and ((1 shl NUMJOYBUTTONS) - 1) // Only first NUMJOYBUTTONS buttons of joystic in use
else
ev.data1 := 0;
ev.data2 := jInfo.wXpos - jwXpos;
ev.data3 := jInfo.wYpos - jwYpos;
D_PostEvent(@ev);
end;
end;
end;
procedure I_SynchronizeInput(active: boolean);
begin
input_active := active;
end;
function I_GetCapsLock: boolean;
begin
result := GetKeyState(VK_CAPITAL) and 1 <> 0;
end;
procedure I_SetCapsLock(const bState: boolean);
var
keyState: TKeyboardState;
begin
GetKeyboardState(keyState);
if bState <> (keyState[VK_CAPITAL] and 1 <> 0) then
begin
// Simulate a key press
keybd_event(VK_CAPITAL, $3A, KEYEVENTF_EXTENDEDKEY, 0);
// Simulate a key release
keybd_event(VK_CAPITAL, $3A, KEYEVENTF_EXTENDEDKEY or KEYEVENTF_KEYUP, 0);
end;
end;
end.