From bce80f17f3ae8e234f62821f47575ce203fda903 Mon Sep 17 00:00:00 2001
From: Katter <narcat99@gmail.com>
Date: Mon, 14 Oct 2024 01:00:10 +0500
Subject: [PATCH] DX11ScreenCapture proper dispose previous capture resources

---
 SightKeeper.Application.Windows/DX11ScreenCapture.cs | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/SightKeeper.Application.Windows/DX11ScreenCapture.cs b/SightKeeper.Application.Windows/DX11ScreenCapture.cs
index 2505c120..e595a9fb 100644
--- a/SightKeeper.Application.Windows/DX11ScreenCapture.cs
+++ b/SightKeeper.Application.Windows/DX11ScreenCapture.cs
@@ -54,9 +54,12 @@ public DX11ScreenCapture()
 
 	private unsafe ReadOnlySpan2D<Bgra32> Capture()
 	{
-		_device.ImmediateContext.UnmapSubresource(_screenTexture, 0);
-		_screenResource?.Dispose();
-		_outputDuplication.ReleaseFrame();
+		if (_screenResource != null)
+		{
+			_device.ImmediateContext.UnmapSubresource(_screenTexture, 0);
+			_screenResource.Dispose();
+			_outputDuplication.ReleaseFrame();
+		}
 		_outputDuplication.TryAcquireNextFrame(1000, out _, out _screenResource).CheckError();
 		using (var screenTexture2D = _screenResource.QueryInterface<Texture2D>())
 			_device.ImmediateContext.CopyResource(screenTexture2D, _screenTexture);