add some basic platform interfaces

Blarg.GameFramework/Blarg.GameFramework.csproj

@@ -75,6 +75,9 @@
     <Compile Include="Math\Transformation.cs" />
     <Compile Include="Math\SweptEllipsoidCollisionPacket.cs" />
     <Compile Include="Math\IntersectionTester.cs" />
+    <Compile Include="Platform.cs" />
+    <Compile Include="IPlatformServices.cs" />
+    <Compile Include="ILogger.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <ItemGroup>

Blarg.GameFramework/ILogger.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace Blarg.GameFramework
+{
+	public interface IPlatformLogger
+	{
+		void Info(string category, string format, params object[] args);
+		void Warn(string category, string format, params object[] args);
+		void Error(string category, string format, params object[] args);
+		void Debug(string category, string format, params object[] args);
+	}
+}
+

Blarg.GameFramework/IPlatformServices.cs

@@ -0,0 +1,15 @@
+using System;
+using Blarg.GameFramework.IO;
+
+namespace Blarg.GameFramework
+{
+	public interface IPlatformServices
+	{
+		PlatformOS OperatingSystem { get; }
+		PlatformType Type { get; }
+
+		IPlatformLogger Logger { get; }
+		IFileSystem FileSystem { get; }
+	}
+}
+

Blarg.GameFramework/Platform.cs

@@ -0,0 +1,25 @@
+using System;
+
+namespace Blarg.GameFramework
+{
+	public enum PlatformOS
+	{
+		Windows,
+		Linux,
+		MacOS,
+		Android,
+		iOS
+	}
+
+	public enum PlatformType
+	{
+		Mobile,
+		Desktop
+	}
+
+	public static partial class Platform
+	{
+		public static IPlatformServices Services { get; private set; }
+	}
+}
+