add a note to readme

README.md

@@ -1,2 +1,5 @@
 # pixel
 A simple and fast desktop multimedia/gamedev library.
+
+The core features of the library are pretty much completed. I'm doing some proofreading and
+improving quality of the code. Will **announce** the library after.

window.go

@@ -284,15 +284,15 @@ func (w *Window) SetFullscreen(monitor *Monitor) {
 				w.restore.xpos, w.restore.ypos = w.window.GetPos()
 				w.restore.width, w.restore.height = w.window.GetSize()
 
-				width, height := monitor.Size()
-				refreshRate := monitor.RefreshRate()
+				mode := monitor.monitor.GetVideoMode()
+
 				w.window.SetMonitor(
 					monitor.monitor,
 					0,
 					0,
-					int(width),
-					int(height),
-					int(refreshRate),
+					mode.Width,
+					mode.Height,
+					mode.RefreshRate,
 				)
 			})
 		}