--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xlib_helpers.nim	Wed Dec 14 00:49:35 2022 +0700
@@ -0,0 +1,37 @@
+import
+  x11/xlib,
+  x11/xutil,
+  x11/x
+
+var deleteMessage*: Atom
+
+template checkXlibResult*(call: untyped) =
+  let value = call
+  if value == 0:
+    raise newException(Exception, "Xlib error: " & astToStr(call) & " returned " & $value)
+
+proc xlibInit*(): (PDisplay, Window) =
+  let display = XOpenDisplay(nil)
+  if display == nil:
+    quit "Failed to open display"
+
+  let
+    screen = XDefaultScreen(display)
+    rootWindow = XRootWindow(display, screen)
+    foregroundColor = XBlackPixel(display, screen)
+    backgroundColor = XWhitePixel(display, screen)
+
+  let window = XCreateSimpleWindow(display, rootWindow, -1, -1, 800, 600, 0, foregroundColor, backgroundColor)
+  checkXlibResult XSetStandardProperties(display, window, "Nim X11", "window", 0, nil, 0, nil)
+  checkXlibResult XSelectInput(display, window, ButtonPressMask or KeyPressMask or ExposureMask)
+  checkXlibResult XMapWindow(display, window)
+
+  deleteMessage = XInternAtom(display, "WM_DELETE_WINDOW", false.XBool)
+  checkXlibResult XSetWMProtocols(display, window, addr(deleteMessage), 1)
+
+  return (display, window)
+
+proc xlibFramebufferSize*(display: PDisplay, window: Window): (int, int) =
+  var attribs: XWindowAttributes
+  checkXlibResult XGetWindowAttributes(display, window, addr(attribs))
+  return (int(attribs.width), int(attribs.height))