Initial work

Ryujinx.Graphics.GAL/ITexture.cs

@@ -0,0 +1,21 @@
+using Ryujinx.Graphics.GAL.Texture;
+using System;
+
+namespace Ryujinx.Graphics.GAL
+{
+    public interface ITexture : IDisposable
+    {
+        int Handle { get; }
+
+        void CopyTo(ITexture destination);
+        void CopyTo(ITexture destination, Extents2D srcRegion, Extents2D dstRegion, bool linearFilter);
+
+        ITexture CreateView(TextureCreateInfo info, int firstLayer, int firstLevel);
+
+        int GetStorageDebugId();
+
+        byte[] GetData(int face);
+
+        void SetData(Span<byte> data);
+    }
+}