--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/semiconginev2/rendering/platform/linux.nim	Wed Jul 17 22:02:11 2024 +0700
@@ -0,0 +1,214 @@
+import ../../thirdparty/x11/xlib
+import ../../thirdparty/x11/xutil
+import ../../thirdparty/x11/keysym
+import ../../thirdparty/x11/x as x11
+import ../../thirdparty/x11/xkblib
+
+const REQUIRED_PLATFORM_EXTENSIONS = @["VK_KHR_xlib_surface"]
+
+# got values (keycodes) from xev
+const KeyTypeMap = {
+  9: Escape, 67: F1, 68: F2, 69: F3, 70: F4, 71: F5, 72: F6, 73: F7, 74: F8,
+  75: F9, 76: F10, 95: F11, 96: F12,
+  49: NumberRowExtra1, 10: `1`, 11: `2`, 12: `3`, 13: `4`, 14: `5`, 15: `6`,
+  16: `7`, 17: `8`, 18: `9`, 19: `0`, 20: NumberRowExtra2, 21: NumberRowExtra3,
+  24: Q, 25: W, 26: E, 27: R, 28: T, 29: Y, 30: U, 31: I, 32: O, 33: P, 38: A,
+  39: S, 40: D, 41: Key.F, 42: G, 43: H, 44: J, 45: K, 46: L, 52: Z, 53: X,
+  54: C, 55: V, 56: B, 57: N, 58: M,
+
+  23: Tab, 66: CapsLock, 50: ShiftL, 62: ShiftR, 37: CtrlL, 105: CtrlR,
+  133: SuperL, 134: SuperR,
+  64: AltL, 108: AltR,
+  65: Space, 36: Enter, 22: Backspace,
+  34: LetterRow1Extra1, 35: LetterRow1Extra2,
+  47: LetterRow2Extra1, 48: LetterRow2Extra2, 51: LetterRow2Extra3,
+  59: LetterRow3Extra1, 60: LetterRow3Extra2, 61: LetterRow3Extra3,
+  111: Up, 116: Down, 113: Left, 114: Right,
+  112: PageUp, 117: PageDown, 110: Home, 115: End, 118: Insert, 119: Delete,
+  107: PrintScreen, 78: ScrollLock, 127: Pause,
+}.toTable
+
+const MouseButtonTypeMap = {
+  x11.Button1: MouseButton.Mouse1,
+  x11.Button2: MouseButton.Mouse2,
+  x11.Button3: MouseButton.Mouse3,
+}.toTable
+
+var deleteMessage*: Atom
+
+type
+  NativeWindow* = object
+    display*: ptr xlib.Display
+    window*: x11.Window
+    emptyCursor: Cursor
+
+template checkXlibResult(call: untyped) =
+  let value = call
+  if value == 0:
+    raise newException(Exception, "Xlib error: " & astToStr(call) &
+        " returned " & $value)
+
+proc XErrorLogger(display: PDisplay, event: PXErrorEvent): cint {.cdecl.} =
+  logging.error &"Xlib: {event[]}"
+
+proc CreateWindow*(title: string): NativeWindow =
+  checkXlibResult XInitThreads()
+  let display = XOpenDisplay(nil)
+  if display == nil:
+    quit "Failed to open display"
+  discard XSetErrorHandler(XErrorLogger)
+
+  let rootWindow = display.XDefaultRootWindow()
+  discard display.XkbSetDetectableAutoRepeat(true, nil)
+  var
+    attribs: XWindowAttributes
+    width = cuint(800)
+    height = cuint(600)
+  checkXlibResult display.XGetWindowAttributes(rootWindow, addr(attribs))
+
+  var attrs = XSetWindowAttributes()
+  let window = XCreateWindow(
+    display,
+    rootWindow,
+    (attribs.width - cint(width)) div 2, (attribs.height - cint(height)) div 2,
+    width, height,
+    0,
+    CopyFromParent,
+    InputOutput,
+    cast[PVisual](CopyFromParent),
+    0, # CWOverrideRedirect,
+    addr attrs,
+    # foregroundColor, backgroundColor
+  )
+  checkXlibResult XSetStandardProperties(display, window, title, "window", 0, nil, 0, nil)
+  checkXlibResult XSelectInput(display, window, PointerMotionMask or ButtonPressMask or ButtonReleaseMask or KeyPressMask or KeyReleaseMask or ExposureMask)
+  checkXlibResult XMapWindow(display, window)
+
+  deleteMessage = XInternAtom(display, "WM_DELETE_WINDOW", XBool(false))
+  checkXlibResult XSetWMProtocols(display, window, addr(deleteMessage), 1)
+
+  var data = "\0".cstring
+  var pixmap = display.XCreateBitmapFromData(window, data, 1, 1)
+  var color: XColor
+  var empty_cursor = display.XCreatePixmapCursor(pixmap, pixmap, addr(color), addr(color), 0, 0)
+  checkXlibResult display.XFreePixmap(pixmap)
+  return NativeWindow(display: display, window: window, emptyCursor: empty_cursor)
+
+proc SetTitle*(window: NativeWindow, title: string) =
+  checkXlibResult XSetStandardProperties(window.display, window.window, title, "window", 0, nil, 0, nil)
+
+proc Fullscreen*(window: var NativeWindow, enable: bool) =
+  var
+    wm_state = window.display.XInternAtom("_NET_WM_STATE", 0)
+    wm_fullscreen = window.display.XInternAtom("_NET_WM_STATE_FULLSCREEN", 0)
+  var
+    xev: XEvent
+  xev.xclient = XClientMessageEvent(
+    message_type: wm_state,
+    format: 32,
+    window: window.window,
+    data: XClientMessageData(
+      l: [
+        int(not enable) xor 1,
+        clong(wm_fullscreen),
+        0,
+        0,
+        0
+    ]
+  )
+  )
+  xev.theType = ClientMessage
+
+  checkXlibResult window.display.XSendEvent(
+    window.display.DefaultRootWindow(),
+    0,
+    SubstructureRedirectMask or SubstructureNotifyMask,
+    addr xev
+  )
+  checkXlibResult window.display.XFlush()
+
+proc HideSystemCursor*(window: NativeWindow) =
+  checkXlibResult XDefineCursor(window.display, window.window, window.emptyCursor)
+  checkXlibResult window.display.XFlush()
+
+proc ShowSystemCursor*(window: NativeWindow) =
+  checkXlibResult XUndefineCursor(window.display, window.window)
+  checkXlibResult window.display.XFlush()
+
+proc Destroy*(window: NativeWindow) =
+  checkXlibResult window.display.XFreeCursor(window.emptyCursor)
+  checkXlibResult window.display.XDestroyWindow(window.window)
+  discard window.display.XCloseDisplay() # always returns 0
+
+proc Size*(window: NativeWindow): (int, int) =
+  var attribs: XWindowAttributes
+  checkXlibResult XGetWindowAttributes(window.display, window.window, addr(attribs))
+  return (int(attribs.width), int(attribs.height))
+
+proc PendingEvents*(window: NativeWindow): seq[Event] =
+  var event: XEvent
+  while window.display.XPending() > 0:
+    discard window.display.XNextEvent(addr(event))
+    case event.theType
+    of ClientMessage:
+      if cast[Atom](event.xclient.data.l[0]) == deleteMessage:
+        result.add(Event(eventType: Quit))
+    of KeyPress:
+      let keyevent = cast[PXKeyEvent](addr(event))
+      let xkey = int(keyevent.keycode)
+      result.add Event(eventType: KeyPressed, key: KeyTypeMap.getOrDefault(xkey, Key.UNKNOWN))
+    of KeyRelease:
+      let keyevent = cast[PXKeyEvent](addr(event))
+      let xkey = int(keyevent.keycode)
+      result.add Event(eventType: KeyReleased, key: KeyTypeMap.getOrDefault(xkey, Key.UNKNOWN))
+    of ButtonPress:
+      let button = int(cast[PXButtonEvent](addr(event)).button)
+      if button == Button4:
+        result.add Event(eventType: MouseWheel, amount: 1'f32)
+      elif button == Button5:
+        result.add Event(eventType: MouseWheel, amount: -1'f32)
+      else:
+        result.add Event(eventType: MousePressed, button: MouseButtonTypeMap.getOrDefault(button, MouseButton.UNKNOWN))
+    of ButtonRelease:
+      let button = int(cast[PXButtonEvent](addr(event)).button)
+      result.add Event(eventType: MouseReleased, button: MouseButtonTypeMap.getOrDefault(button, MouseButton.UNKNOWN))
+    of MotionNotify:
+      let motion = cast[PXMotionEvent](addr(event))
+      result.add Event(eventType: MouseMoved, x: motion.x, y: motion.y)
+    of ConfigureNotify, Expose:
+      result.add Event(eventType: ResizedWindow)
+    else:
+      discard
+
+
+proc GetMousePosition*(window: NativeWindow): Option[Vec2f] =
+  var
+    root: x11.Window
+    win: x11.Window
+    rootX: cint
+    rootY: cint
+    winX: cint
+    winY: cint
+    mask: cuint
+    onscreen = XQueryPointer(
+      window.display,
+      window.window,
+      addr(root),
+      addr(win),
+      addr(rootX),
+      addr(rootY),
+      addr(winX),
+      addr(winY),
+      addr(mask),
+    )
+  if onscreen != 0:
+    result = some(Vec2f([float32(winX), float32(winY)]))
+
+
+proc CreateNativeSurface(instance: VkInstance, window: NativeWindow): VkSurfaceKHR =
+  var surfaceCreateInfo = VkXlibSurfaceCreateInfoKHR(
+    sType: VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR,
+    dpy: cast[ptr Display](window.display),
+    window: cast[Window](window.window),
+  )
+  checkVkResult vkCreateXlibSurfaceKHR(instance, addr(surfaceCreateInfo), nil, addr(result))