--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/semiconginev2/rendering/platform/windows.nim	Wed Jul 17 22:02:11 2024 +0700
@@ -0,0 +1,204 @@
+import ../../../thirdparty/winim/winim/inc/[windef, winuser, wincon, winbase]
+import ../../../thirdparty/winim/winim/[winstr, utils]
+
+const REQUIRED_PLATFORM_EXTENSIONS = @["VK_KHR_win32_surface"]
+
+const KeyTypeMap* = {
+  VK_ESCAPE: Key.Escape, VK_F1: F1, VK_F2: F2, VK_F3: F3, VK_F4: F4, VK_F5: F5,
+  VK_F6: F6, VK_F7: F7, VK_F8: F8, VK_F9: F9, VK_F10: F10, VK_F11: F11,
+  VK_F12: F12,
+  VK_OEM_3: NumberRowExtra1, int('0'): `0`, int('1'): `1`, int('2'): `2`, int(
+      '3'): `3`, int('4'): `4`, int('5'): `5`, int('6'): `6`, int('7'): `7`,
+      int('8'): `8`, int('9'): `9`, VK_OEM_MINUS: NumberRowExtra2,
+      VK_OEM_PLUS: NumberRowExtra3,
+  int('A'): A, int('B'): B, int('C'): C, int('D'): D, int('E'): E, int('F'): F,
+      int('G'): G, int('H'): H, int('I'): I, int('J'): J, int('K'): K, int(
+      'L'): L, int('M'): M, int('N'): N, int('O'): O, int('P'): P, int('Q'): Q,
+      int('R'): R, int('S'): S, int('T'): T, int('U'): U, int('V'): V, int(
+      'W'): W, int('X'): X, int('Y'): Y, int('Z'): Z,
+  VK_TAB: Tab, VK_CAPITAL: CapsLock, VK_LSHIFT: ShiftL, VK_SHIFT: ShiftL,
+      VK_RSHIFT: ShiftR, VK_LCONTROL: CtrlL, VK_CONTROL: CtrlL,
+      VK_RCONTROL: CtrlR, VK_LWIN: SuperL, VK_RWIN: SuperR, VK_LMENU: AltL,
+      VK_RMENU: AltR, VK_SPACE: Space, VK_RETURN: Enter, VK_BACK: Backspace,
+  VK_OEM_4: LetterRow1Extra1, VK_OEM_6: LetterRow1Extra2,
+      VK_OEM_5: LetterRow2Extra3,
+  VK_OEM_1: LetterRow2Extra1, VK_OEM_7: LetterRow2Extra2,
+  VK_OEM_COMMA: LetterRow3Extra1, VK_OEM_PERIOD: LetterRow3Extra2,
+      VK_OEM_2: LetterRow3Extra3,
+    VK_UP: Up, VK_DOWN: Down, VK_LEFT: Left, VK_RIGHT: Right,
+    VK_PRIOR: PageUp, VK_NEXT: PageDown, VK_HOME: Home, VK_END: End,
+        VK_INSERT: Insert, VK_DELETE: Key.Delete,
+}.toTable
+
+type
+  NativeWindow* = object
+    hinstance*: HINSTANCE
+    hwnd*: HWND
+    g_wpPrev: WINDOWPLACEMENT
+
+
+# sorry, have to use module-global variable to capture windows events
+var currentEvents: seq[Event]
+
+template CheckWin32Result*(call: untyped) =
+  let value = call
+  if value == 0:
+    raise newException(Exception, "Win32 error: " & astToStr(call) & " returned " & $value)
+
+let
+  andCursorMask = [0xff]
+  xorCursorMask = [0x00]
+  invisibleCursor = CreateCursor(0, 0, 0, 1, 1, pointer(addr andCursorMask), pointer(addr xorCursorMask))
+  defaultCursor = LoadCursor(0, IDC_ARROW)
+var currentCursor = defaultCursor
+
+proc MapLeftRightKeys(key: INT, lparam: LPARAM): INT =
+  case key
+  of VK_SHIFT:
+    MapVirtualKey(UINT((lParam and 0x00ff0000) shr 16), MAPVK_VSC_TO_VK_EX)
+  of VK_CONTROL:
+    if (lParam and 0x01000000) == 0: VK_LCONTROL else: VK_RCONTROL
+  of VK_MENU:
+    if (lParam and 0x01000000) == 0: VK_LMENU else: VK_RMENU
+  else:
+    key
+
+proc WindowHandler(hwnd: HWND, uMsg: UINT, wParam: WPARAM, lParam: LPARAM): LRESULT {.stdcall.} =
+  case uMsg
+  of WM_DESTROY:
+    currentEvents.add(Event(eventType: EventType.Quit))
+  of WM_KEYDOWN, WM_SYSKEYDOWN:
+    let key = MapLeftRightKeys(INT(wParam), lParam)
+    currentEvents.add(Event(eventType: KeyPressed, key: KeyTypeMap.getOrDefault(key, Key.UNKNOWN)))
+  of WM_KEYUP, WM_SYSKEYUP:
+    let key = MapLeftRightKeys(INT(wParam), lParam)
+    currentEvents.add(Event(eventType: KeyReleased, key: KeyTypeMap.getOrDefault(key, Key.UNKNOWN)))
+  of WM_LBUTTONDOWN:
+    currentEvents.add(Event(eventType: MousePressed, button: MouseButton.Mouse1))
+  of WM_LBUTTONUP:
+    currentEvents.add(Event(eventType: MouseReleased, button: MouseButton.Mouse1))
+  of WM_MBUTTONDOWN:
+    currentEvents.add(Event(eventType: MousePressed, button: MouseButton.Mouse2))
+  of WM_MBUTTONUP:
+    currentEvents.add(Event(eventType: MouseReleased, button: MouseButton.Mouse2))
+  of WM_RBUTTONDOWN:
+    currentEvents.add(Event(eventType: MousePressed, button: MouseButton.Mouse3))
+  of WM_RBUTTONUP:
+    currentEvents.add(Event(eventType: MouseReleased, button: MouseButton.Mouse3))
+  of WM_MOUSEMOVE:
+    currentEvents.add(Event(eventType: MouseMoved, x: GET_X_LPARAM(lParam), y: GET_Y_LPARAM(lParam)))
+  of WM_MOUSEWHEEL:
+    currentEvents.add(Event(eventType: MouseWheel, amount: float32(GET_WHEEL_DELTA_WPARAM(wParam)) / WHEEL_DELTA))
+  of WM_SIZING:
+    currentEvents.add(Event(eventType: ResizedWindow))
+  of WM_SIZE:
+    if wParam == SIZE_MINIMIZED:
+      currentEvents.add(Event(eventType: MinimizedWindow))
+    elif wParam == SIZE_RESTORED:
+      currentEvents.add(Event(eventType: RestoredWindow))
+  of WM_SETCURSOR:
+    if LOWORD(lParam) == HTCLIENT:
+      SetCursor(currentCursor)
+      return 1
+    else:
+      return DefWindowProc(hwnd, uMsg, wParam, lParam)
+  else:
+    return DefWindowProc(hwnd, uMsg, wParam, lParam)
+
+
+proc CreateWindow*(title: string): NativeWindow =
+  when DEBUG:
+    AllocConsole()
+    discard stdin.reopen("conIN$", fmRead)
+    discard stdout.reopen("conOUT$", fmWrite)
+    discard stderr.reopen("conOUT$", fmWrite)
+
+  result.hInstance = HINSTANCE(GetModuleHandle(nil))
+  var
+    windowClassName = T"EngineWindowClass"
+    windowName = T(title)
+    windowClass = WNDCLASSEX(
+      cbSize: UINT(WNDCLASSEX.sizeof),
+      lpfnWndProc: WindowHandler,
+      hInstance: result.hInstance,
+      lpszClassName: windowClassName,
+       hcursor: currentCursor,
+    )
+
+  if(RegisterClassEx(addr(windowClass)) == 0):
+    raise newException(Exception, "Unable to register window class")
+
+  result.hwnd = CreateWindowEx(
+      DWORD(0),
+      windowClassName,
+      windowName,
+      DWORD(WS_OVERLAPPEDWINDOW),
+      CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
+      HMENU(0),
+      HINSTANCE(0),
+      result.hInstance,
+      nil
+    )
+
+  result.g_wpPrev.length = UINT(sizeof(WINDOWPLACEMENT))
+  discard result.hwnd.ShowWindow(SW_SHOW)
+
+proc SetTitle*(window: NativeWindow, title: string) =
+  window.hwnd.SetWindowText(T(title))
+
+# inspired by the one and only, Raymond Chen
+# https://devblogs.microsoft.com/oldnewthing/20100412-00/?p=14353
+proc Fullscreen*(window: var NativeWindow, enable: bool) =
+  let dwStyle: DWORD = GetWindowLong(window.hwnd, GWL_STYLE)
+  if enable:
+    var mi = MONITORINFO(cbSize: DWORD(sizeof(MONITORINFO)))
+    if GetWindowPlacement(window.hwnd, addr window.g_wpPrev) and GetMonitorInfo(MonitorFromWindow(window.hwnd, MONITOR_DEFAULTTOPRIMARY), addr mi):
+      SetWindowLong(window.hwnd, GWL_STYLE, dwStyle and (not WS_OVERLAPPEDWINDOW))
+      SetWindowPos(window.hwnd, HWND_TOP, mi.rcMonitor.left, mi.rcMonitor.top, mi.rcMonitor.right - mi.rcMonitor.left, mi.rcMonitor.bottom - mi.rcMonitor.top, SWP_NOOWNERZORDER or SWP_FRAMECHANGED)
+  else:
+    SetWindowLong(window.hwnd, GWL_STYLE, dwStyle or WS_OVERLAPPEDWINDOW)
+    SetWindowPlacement(window.hwnd, addr window.g_wpPrev)
+    SetWindowPos(window.hwnd, HWND(0), 0, 0, 0, 0, SWP_NOMOVE or SWP_NOSIZE or SWP_NOZORDER or SWP_NOOWNERZORDER or SWP_FRAMECHANGED)
+
+proc HideSystemCursor*(window: NativeWindow) =
+  currentCursor = invisibleCursor
+  SetCursor(currentCursor)
+
+proc ShowSystemCursor*(window: NativeWindow) =
+  currentCursor = defaultCursor
+  SetCursor(currentCursor)
+
+proc Destroy*(window: NativeWindow) =
+  discard
+
+proc Size*(window: NativeWindow): (int, int) =
+  var rect: RECT
+  CheckWin32Result GetWindowRect(window.hwnd, addr(rect))
+  (int(rect.right - rect.left), int(rect.bottom - rect.top))
+
+proc PendingEvents*(window: NativeWindow): seq[Event] =
+  # empty queue
+  currentEvents = newSeq[Event]()
+  var msg: MSG
+  # fill queue
+  while PeekMessage(addr(msg), window.hwnd, 0, 0, PM_REMOVE):
+    TranslateMessage(addr(msg))
+    DispatchMessage(addr(msg))
+  return currentEvents
+
+proc GetMousePosition*(window: NativeWindow): Option[Vec2f] =
+  var p: POINT
+  let res = GetCursorPos(addr(p))
+  if res:
+    return some(Vec2f([float32(p.x), float32(p.y)]))
+  return none(Vec2f)
+
+
+proc CreateNativeSurface*(instance: VkInstance, window: NativeWindow): VkSurfaceKHR =
+  assert instance.Valid
+  var surfaceCreateInfo = VkWin32SurfaceCreateInfoKHR(
+    sType: VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR,
+    hinstance: cast[HINSTANCE](window.hinstance),
+    hwnd: cast[HWND](window.hwnd),
+  )
+  checkVkResult vkCreateWin32SurfaceKHR(instance, addr(surfaceCreateInfo), nil, addr(result))