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

---
 .../Effects/EffectResource.cs                      | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/Effects/EffectResource.cs

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

diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/Effects/EffectResource.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/Effects/EffectResource.cs
new file mode 100644
index 0000000..43bd535
--- /dev/null
+++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Graphics/Effects/EffectResource.cs
@@ -0,0 +1,119 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace MonoGame.Extended.Graphics.Effects
+{
+    /// <summary>
+    ///     Reperesents the bytecode of an <see cref="Effect" /> that is encapsulated inside a compiled assembly.
+    /// </summary>
+    /// <remarks>
+    ///     <para>
+    ///         Files that are encapsulated inside a compiled assembly are commonly known as Manifiest or embedded resources.
+    ///         Since embedded resources are added to the assembly at compiled time, they can not be accidentally deleted or
+    ///         misplaced. However, if the file needs to be changed, the assembly will need to be re-compiled with the changed
+    ///         file.
+    ///     </para>
+    ///     <para>
+    ///         To add an embedded resource file to an assembly, first add it to the project and then change the Build Action
+    ///         in the Properties of the file to <code>Embedded Resource</code>. The next time the project is compiled, the
+    ///         compiler will add the file to the assembly as an embedded resource. The compiler adds namespace(s) to the
+    ///         embedded resource so it matches with the path of where the file was added to the project.
+    ///     </para>
+    /// </remarks>
+    public class EffectResource
+    {
+        private static EffectResource _defaultEffect;
+        private static string _shaderExtension;
+
+        /// <summary>
+        ///     Gets the <see cref="Effects.DefaultEffect" /> embedded into the MonoGame.Extended.Graphics library.
+        /// </summary>
+        public static EffectResource DefaultEffect => _defaultEffect ?? (_defaultEffect = new EffectResource($"MonoGame.Extended.Graphics.Effects.Resources.DefaultEffect.{_shaderExtension}.mgfxo"));
+
+        static EffectResource()
+        {
+            DetermineShaderExtension();
+        }
+
+        private static void DetermineShaderExtension()
+        {
+            // use reflection to figure out if Shader.Profile is OpenGL (0) or DirectX (1),
+            // may need to be changed / fixed for future shader profiles
+
+            var assembly = typeof(Game).GetTypeInfo().Assembly;
+            Debug.Assert(assembly != null);
+
+            var shaderType = assembly.GetType("Microsoft.Xna.Framework.Graphics.Shader");
+            Debug.Assert(shaderType != null);
+            var shaderTypeInfo = shaderType.GetTypeInfo();
+            Debug.Assert(shaderTypeInfo != null);
+
+            // https://github.com/MonoGame/MonoGame/blob/develop/MonoGame.Framework/Graphics/Shader/Shader.cs#L47
+            var profileProperty = shaderTypeInfo.GetDeclaredProperty("Profile");
+            var value = (int)profileProperty.GetValue(null);
+
+            switch (value)
+            {
+                case 0:
+                    // OpenGL
+                    _shaderExtension = "ogl";
+                    break;
+                case 1:
+                    // DirectX
+                    _shaderExtension = "dx11";
+                    break;
+                default:
+                    throw new InvalidOperationException("Unknown shader profile.");
+            }
+        }
+
+        private readonly string _resourceName;
+        private volatile byte[] _bytecode;
+        private readonly Assembly _assembly;
+
+        /// <summary>
+        ///     Gets the bytecode of the <see cref="Effect" /> file.
+        /// </summary>
+        /// <value>
+        ///     The bytecode of the <see cref="Effect" /> file.
+        /// </value>
+        public byte[] Bytecode
+        {
+            get
+            {
+                if (_bytecode != null)
+                    return _bytecode;
+
+                lock (this)
+                {
+                    if (_bytecode != null)
+                        return _bytecode;
+
+                    var stream = _assembly.GetManifestResourceStream(_resourceName);
+                    using (var memoryStream = new MemoryStream())
+                    {
+                        stream.CopyTo(memoryStream);
+                        _bytecode = memoryStream.ToArray();
+                    }
+                }
+
+                return _bytecode;
+            }
+        }
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="EffectResource" /> class.
+        /// </summary>
+        /// <param name="resourceName">The name of the embedded resource. This must include the namespace(s).</param>
+        /// <param name="assembly">The assembly which the embedded resource is apart of.</param>
+        public EffectResource(string resourceName, Assembly assembly = null)
+        {
+            _resourceName = resourceName;
+            _assembly = assembly ?? typeof(EffectResource).GetTypeInfo().Assembly;
+        }
+    }
+}
\ No newline at end of file
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