From acea7b2e728787a0d83bbf83c8c1f042d2c32e7e Mon Sep 17 00:00:00 2001
From: chai <215380520@qq.com>
Date: Mon, 3 Jun 2024 10:15:45 +0800
Subject: + plugins project

---
 .../RenderTarget2DExtensions.cs                    | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/RenderTarget2DExtensions.cs

(limited to 'Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/RenderTarget2DExtensions.cs')

diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/RenderTarget2DExtensions.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/RenderTarget2DExtensions.cs
new file mode 100644
index 0000000..f090603
--- /dev/null
+++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/RenderTarget2DExtensions.cs
@@ -0,0 +1,41 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace MonoGame.Extended.Graphics
+{
+    public static class RenderTarget2DExtensions
+    {
+        public static IDisposable BeginDraw(this RenderTarget2D renderTarget, GraphicsDevice graphicsDevice,
+            Color backgroundColor)
+        {
+            return new RenderTargetOperation(renderTarget, graphicsDevice, backgroundColor);
+        }
+
+        private class RenderTargetOperation : IDisposable
+        {
+            private readonly GraphicsDevice _graphicsDevice;
+            private readonly RenderTargetUsage _previousRenderTargetUsage;
+            private readonly Viewport _viewport;
+
+            public RenderTargetOperation(RenderTarget2D renderTarget, GraphicsDevice graphicsDevice,
+                Color backgroundColor)
+            {
+                _graphicsDevice = graphicsDevice;
+                _viewport = _graphicsDevice.Viewport;
+                _previousRenderTargetUsage = _graphicsDevice.PresentationParameters.RenderTargetUsage;
+
+                _graphicsDevice.PresentationParameters.RenderTargetUsage = RenderTargetUsage.PreserveContents;
+                _graphicsDevice.SetRenderTarget(renderTarget);
+                _graphicsDevice.Clear(backgroundColor);
+            }
+
+            public void Dispose()
+            {
+                _graphicsDevice.SetRenderTarget(null);
+                _graphicsDevice.PresentationParameters.RenderTargetUsage = _previousRenderTargetUsage;
+                _graphicsDevice.Viewport = _viewport;
+            }
+        }
+    }
+}
\ No newline at end of file
-- 
cgit v1.1-26-g67d0