feat: DpiAware

src/Wpf.Ui.Violeta/Win32/DpiAware.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Windows.Media;
+
+namespace Wpf.Ui.Violeta.Win32;
+
+public static class DpiAware
+{
+    /// <summary>
+    /// <see cref="DisableDpiAwarenessAttribute"/>
+    /// </summary>
+    public static bool SetProcessDpiAwareness()
+    {
+        if (NTdll.RtlGetVersion(out NTdll.OSVERSIONINFOEX osv) == NTdll.NTStatus.STATUS_SUCCESS)
+        {
+            Version osVersion = new(osv.MajorVersion, osv.MinorVersion, osv.BuildNumber, osv.PlatformId);
+
+            if (Environment.OSVersion.Platform == PlatformID.Win32NT && osVersion >= new Version(6, 3))
+            {
+                if (SHCore.SetProcessDpiAwareness(SHCore.PROCESS_DPI_AWARENESS.PROCESS_PER_MONITOR_DPI_AWARE) == 0)
+                {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+}

src/Wpf.Ui.Violeta/Win32/DpiHelper.cs

@@ -1,7 +1,4 @@
-using System.Runtime.InteropServices;
-using System.Security;
-
-namespace Wpf.Ui.Violeta.Win32;
+namespace Wpf.Ui.Violeta.Win32;
 
 internal static class DpiHelper
 {
@@ -10,29 +7,10 @@ internal static class DpiHelper
 
     private static (float X, float Y) GetScale()
     {
-        nint hdc = GetDC(0);
-        float scaleX = GetDeviceCaps(hdc, DeviceCap.LOGPIXELSX);
-        float scaleY = GetDeviceCaps(hdc, DeviceCap.LOGPIXELSY);
-        _ = ReleaseDC(0, hdc);
+        nint hdc = User32.GetDC(0);
+        float scaleX = User32.GetDeviceCaps(hdc, User32.DeviceCap.LOGPIXELSX);
+        float scaleY = User32.GetDeviceCaps(hdc, User32.DeviceCap.LOGPIXELSY);
+        _ = User32.ReleaseDC(0, hdc);
         return new(scaleX / 96f, scaleY / 96f);
     }
-
-    [SecurityCritical]
-    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
-    [DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-    private static extern nint GetDC(nint hWnd);
-
-    [SecurityCritical]
-    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
-    [DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-    private static extern int ReleaseDC(nint hWnd, nint hDC);
-
-    [DllImport("gdi32.dll", SetLastError = false, ExactSpelling = true)]
-    private static extern int GetDeviceCaps(nint hdc, DeviceCap nIndex);
-
-    private enum DeviceCap
-    {
-        LOGPIXELSX = 88,
-        LOGPIXELSY = 90,
-    }
 }

src/Wpf.Ui.Violeta/Win32/NTdll.cs

@@ -6,14 +6,28 @@ namespace Wpf.Ui.Violeta.Win32;
 
 internal static class NTdll
 {
+    [SecurityCritical]
+    [DllImport("ntdll.dll", SetLastError = true, CharSet = CharSet.Unicode)]
+    [DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+    public static extern int RtlGetVersion(out OSVERSIONINFOEX versionInfo);
+
+    public static Version GetOSVersion()
+    {
+        if (RtlGetVersion(out OSVERSIONINFOEX osv) == 0)
+        {
+            return new Version(osv.MajorVersion, osv.MinorVersion, osv.BuildNumber, osv.Revision);
+        }
+
+        return Environment.OSVersion.Version;
+    }
+
     [StructLayout(LayoutKind.Sequential)]
     public struct OSVERSIONINFOEX
     {
         public int OSVersionInfoSize;
         public int MajorVersion;
         public int MinorVersion;
         public int BuildNumber;
-        public int Revision;
         public int PlatformId;
 
         [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
@@ -26,18 +40,8 @@ public struct OSVERSIONINFOEX
         public byte Reserved;
     }
 
-    [SecurityCritical]
-    [DllImport("ntdll.dll", SetLastError = true, CharSet = CharSet.Unicode)]
-    [DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-    public static extern int RtlGetVersion(out OSVERSIONINFOEX versionInfo);
-
-    public static Version GetOSVersion()
+    public static class NTStatus
     {
-        if (RtlGetVersion(out OSVERSIONINFOEX osv) == 0)
-        {
-            return new Version(osv.MajorVersion, osv.MinorVersion, osv.BuildNumber, osv.Revision);
-        }
-
-        return Environment.OSVersion.Version;
+        public const int STATUS_SUCCESS = 0;
     }
 }

src/Wpf.Ui.Violeta/Win32/SHCore.cs

@@ -0,0 +1,27 @@
+using System.Runtime.InteropServices;
+
+namespace Wpf.Ui.Violeta.Win32;
+
+internal static class SHCore
+{
+    [DllImport("shcore.dll")]
+    public static extern uint SetProcessDpiAwareness(PROCESS_DPI_AWARENESS awareness);
+
+    [DllImport("shcore.dll")]
+    public static extern int GetDpiForMonitor(nint hmonitor, MONITOR_DPI_TYPE dpiType, out uint dpiX, out uint dpiY);
+
+    public enum PROCESS_DPI_AWARENESS
+    {
+        PROCESS_DPI_UNAWARE,
+        PROCESS_SYSTEM_DPI_AWARE,
+        PROCESS_PER_MONITOR_DPI_AWARE,
+    }
+
+    public enum MONITOR_DPI_TYPE
+    {
+        MDT_EFFECTIVE_DPI = 0,
+        MDT_ANGULAR_DPI,
+        MDT_RAW_DPI,
+        MDT_DEFAULT = MDT_EFFECTIVE_DPI,
+    }
+}

src/Wpf.Ui.Violeta/Win32/User32.cs

@@ -1,10 +1,24 @@
 using System;
 using System.Runtime.InteropServices;
+using System.Security;
 
 namespace Wpf.Ui.Violeta.Win32;
 
 internal static class User32
 {
+    [SecurityCritical]
+    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
+    [DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+    public static extern nint GetDC(nint hWnd);
+
+    [SecurityCritical]
+    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
+    [DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+    public static extern int ReleaseDC(nint hWnd, nint hDC);
+
+    [DllImport("gdi32.dll", SetLastError = false, ExactSpelling = true)]
+    public static extern int GetDeviceCaps(nint hdc, DeviceCap nIndex);
+
     [DllImport("user32.dll", SetLastError = false, ExactSpelling = true)]
     [return: MarshalAs(UnmanagedType.Bool)]
     public static extern bool SetForegroundWindow(nint hWnd);
@@ -31,4 +45,10 @@ public enum DialogBoxCommand : uint
         IDTRYAGAIN = 9,
         IDCONTINUE = 10,
     }
+
+    public enum DeviceCap
+    {
+        LOGPIXELSX = 88,
+        LOGPIXELSY = 90,
+    }
 }