properly dispose resources

Author: d2phap

Source/DXControl/D2Phap.DXControl.csproj

@@ -22,7 +22,7 @@
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <PackageReleaseNotes>See release notes here: https://github.com/d2phap/DXControl/releases</PackageReleaseNotes>
     <Authors>Duong Dieu Phap</Authors>
-    <VersionPrefix>3.2.0</VersionPrefix>
+    <VersionPrefix>3.3.0</VersionPrefix>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName).xml</DocumentationFile>

Source/DXControl/DXControl.cs

@@ -23,8 +23,8 @@ public class DXControl : Control
     protected readonly PeriodicTimer _timer = new(TimeSpan.FromMilliseconds(10));
 
     // Protected properties
-    protected readonly IComObject<ID2D1Factory1> _d2DFactory = D2D1Functions.D2D1CreateFactory<ID2D1Factory1>(D2D1_FACTORY_TYPE.D2D1_FACTORY_TYPE_SINGLE_THREADED);
-    protected readonly IComObject<IDWriteFactory5> _dWriteFactory = DWriteFunctions.DWriteCreateFactory<IDWriteFactory5>(DWRITE_FACTORY_TYPE.DWRITE_FACTORY_TYPE_SHARED);
+    protected IComObject<ID2D1Factory1>? _d2DFactory = null;
+    protected IComObject<IDWriteFactory5>? _dWriteFactory = null;
     protected IComObject<ID2D1HwndRenderTarget>? _renderTarget;
     protected IComObject<ID2D1DeviceContext6>? _device;
     protected D2DGraphics? _graphicsD2d;
@@ -47,14 +47,14 @@ public class DXControl : Control
     /// Gets Direct2D factory.
     /// </summary>
     [Browsable(false)]
-    public IComObject<ID2D1Factory1> Direct2DFactory => _d2DFactory;
+    public IComObject<ID2D1Factory1>? Direct2DFactory => _d2DFactory;
 
 
     /// <summary>
     /// Gets DirectWrite factory.
     /// </summary>
     [Browsable(false)]
-    public IComObject<IDWriteFactory5> DirectWriteFactory => _dWriteFactory;
+    public IComObject<IDWriteFactory5>? DirectWriteFactory => _dWriteFactory;
 
 
     /// <summary>
@@ -218,9 +218,6 @@ protected override void DestroyHandle()
     {
         base.DestroyHandle();
 
-        _d2DFactory.Dispose();
-        _dWriteFactory.Dispose();
-
         DisposeDevice();
     }
 
@@ -272,8 +269,6 @@ protected override void WndProc(ref Message m)
                 break;
 
             case WM_DESTROY:
-                _d2DFactory.Dispose();
-                _dWriteFactory.Dispose();
                 DisposeDevice();
 
                 base.WndProc(ref m);
@@ -480,6 +475,9 @@ private async Task StartFramingTimerAsync()
     /// </summary>
     public void CreateDevice()
     {
+        _d2DFactory = D2D1Functions.D2D1CreateFactory<ID2D1Factory1>(D2D1_FACTORY_TYPE.D2D1_FACTORY_TYPE_SINGLE_THREADED);
+        _dWriteFactory = DWriteFunctions.DWriteCreateFactory<IDWriteFactory5>(DWRITE_FACTORY_TYPE.DWRITE_FACTORY_TYPE_SHARED);
+
         var renderTargetProps = new D2D1_RENDER_TARGET_PROPERTIES()
         {
             dpiX = _dpi,
@@ -517,12 +515,21 @@ public void CreateDevice()
     /// </summary>
     public void DisposeDevice()
     {
+        _graphicsD2d?.Dispose();
+        _graphicsD2d = null;
+
         _device?.Dispose();
         _device = null;
 
         _renderTarget?.Dispose();
         _renderTarget = null;
 
+        _d2DFactory?.Dispose();
+        _d2DFactory = null;
+
+        _dWriteFactory?.Dispose();
+        _dWriteFactory = null;
+
         GC.Collect();
     }
 

Source/DXControl/Graphics/D2DGraphics.cs

@@ -26,9 +26,6 @@ protected virtual void Dispose(bool disposing)
         if (disposing)
         {
             // Free any other managed objects here.
-
-            DWriteFactory.Dispose();
-            DeviceContext.Dispose();
         }
 
         // Free any unmanaged objects here.

Source/Demo/Demo.csproj

@@ -17,8 +17,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="13.7.0" />
-    <PackageReference Include="Magick.NET.SystemWindowsMedia" Version="7.2.3" />
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="13.8.0" />
+    <PackageReference Include="Magick.NET.SystemWindowsMedia" Version="7.2.4" />
   </ItemGroup>
 
   <ItemGroup>