From 29d02f0ad2b21269148128988645c3a17363b76e Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Wed, 10 Oct 2018 12:44:46 +0100
Subject: [PATCH] Call SetProcessDPIAware() on Win32 backend so that the
 application is guarenteed to see the real dpi.

---
 src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs | 3 +++
 src/Windows/Avalonia.Win32/Win32Platform.cs            | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
index 5fe889f41d..c3c867d3fb 100644
--- a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
+++ b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
@@ -976,6 +976,9 @@ namespace Avalonia.Win32.Interop
         [DllImport("shcore.dll")]
         public static extern void GetScaleFactorForMonitor(IntPtr hMon, out uint pScale);
 
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern bool SetProcessDPIAware();
+
         [DllImport("user32.dll")]
         public static extern IntPtr MonitorFromPoint(POINT pt, MONITOR dwFlags);
 
diff --git a/src/Windows/Avalonia.Win32/Win32Platform.cs b/src/Windows/Avalonia.Win32/Win32Platform.cs
index 89943b5b0a..5041942c63 100644
--- a/src/Windows/Avalonia.Win32/Win32Platform.cs
+++ b/src/Windows/Avalonia.Win32/Win32Platform.cs
@@ -77,6 +77,8 @@ namespace Avalonia.Win32
 
         public static void Initialize(bool deferredRendering = true)
         {
+            UnmanagedMethods.SetProcessDPIAware();
+
             AvaloniaLocator.CurrentMutable
                 .Bind<IClipboard>().ToSingleton<ClipboardImpl>()
                 .Bind<IStandardCursorFactory>().ToConstant(CursorFactory.Instance)