Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/Graphics/ShaderBindings.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.IO;
+using System.Linq;
+
+namespace OpenRA.Graphics
+{
+	public enum ShaderVertexAttributeType
+	{
+		// Assign the underlying OpenGL type values
+		// to simplify enum use in the shader
+		Float = 0x1406, // GL_FLOAT
+		Int = 0x1404, // GL_INT
+		UInt = 0x1405 // GL_UNSIGNED_INT
+	}
+
+	public readonly record struct ShaderVertexAttribute(string Name, ShaderVertexAttributeType Type, int Components, int Offset);
+
+	public abstract class ShaderBindings : IShaderBindings
+	{
+		public string VertexShaderName { get; }
+		public string VertexShaderCode { get; }
+		public string FragmentShaderName { get; }
+		public string FragmentShaderCode { get; }
+		public int Stride { get; }
+
+		public abstract ShaderVertexAttribute[] Attributes { get; }
+
+		protected ShaderBindings(string name)
+			: this(name, name) { }
+
+		protected ShaderBindings(string vertexName, string fragmentName)
+		{
+			Stride = Attributes.Sum(a => a.Components * 4);
+			VertexShaderName = vertexName;
+			VertexShaderCode = GetShaderCode(VertexShaderName + ".vert");
+			FragmentShaderName = fragmentName;
+			FragmentShaderCode = GetShaderCode(FragmentShaderName + ".frag");
+		}
+
+		public static string GetShaderCode(string filename)
+		{
+			var filepath = Path.Combine(Platform.EngineDir, "glsl", filename);
+			return File.ReadAllText(filepath);
+		}
+	}
+}