From 6088975a82950baf0840a559b41a18fcee173ab3 Mon Sep 17 00:00:00 2001
From: Andrey Kunchev <donandren@gmail.com>
Date: Fri, 7 Dec 2018 09:31:52 +0200
Subject: [PATCH] fixes some rare rendering artifacts when dpi != 100%

---
 src/Windows/Avalonia.Win32/WindowImpl.cs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/Windows/Avalonia.Win32/WindowImpl.cs b/src/Windows/Avalonia.Win32/WindowImpl.cs
index 56bb7347ec..6174bc360f 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.cs
@@ -281,10 +281,10 @@ namespace Avalonia.Win32
             var f = Scaling;
             var r = new UnmanagedMethods.RECT
             {
-                left = (int)(rect.X * f),
-                top = (int)(rect.Y * f),
-                right = (int)(rect.Right * f),
-                bottom = (int)(rect.Bottom * f),
+                left = (int)Math.Floor(rect.X * f),
+                top = (int)Math.Floor(rect.Y * f),
+                right = (int)Math.Ceiling(rect.Right * f),
+                bottom = (int)Math.Ceiling(rect.Bottom * f),
             };
 
             UnmanagedMethods.InvalidateRect(_hwnd, ref r, false);