Initial work

Ryujinx.Graphics.Gpu/Image/TexturePoolCache.cs

@@ -0,0 +1,73 @@
+using System.Collections.Generic;
+
+namespace Ryujinx.Graphics.Gpu.Image
+{
+    class TexturePoolCache
+    {
+        private const int MaxCapacity = 4;
+
+        private GpuContext     _context;
+        private TextureManager _textureManager;
+
+        private LinkedList<TexturePool> _pools;
+
+        public TexturePoolCache(GpuContext context, TextureManager textureManager)
+        {
+            _context        = context;
+            _textureManager = textureManager;
+
+            _pools = new LinkedList<TexturePool>();
+        }
+
+        public TexturePool FindOrCreate(ulong address, int maximumId)
+        {
+            TexturePool pool;
+
+            // First we try to find the pool.
+            for (LinkedListNode<TexturePool> node = _pools.First; node != null; node = node.Next)
+            {
+                pool = node.Value;
+
+                if (pool.Address == address)
+                {
+                    if (pool.CacheNode != _pools.Last)
+                    {
+                        _pools.Remove(pool.CacheNode);
+
+                        pool.CacheNode = _pools.AddLast(pool);
+                    }
+
+                    return pool;
+                }
+            }
+
+            // If not found, create a new one.
+            pool = new TexturePool(_context, _textureManager, address, maximumId);
+
+            pool.CacheNode = _pools.AddLast(pool);
+
+            if (_pools.Count > MaxCapacity)
+            {
+                TexturePool oldestPool = _pools.First.Value;
+
+                _pools.RemoveFirst();
+
+                oldestPool.Dispose();
+
+                oldestPool.CacheNode = null;
+            }
+
+            return pool;
+        }
+
+        public void InvalidateRange(ulong address, ulong size)
+        {
+            for (LinkedListNode<TexturePool> node = _pools.First; node != null; node = node.Next)
+            {
+                TexturePool pool = node.Value;
+
+                pool.InvalidateRange(address, size);
+            }
+        }
+    }
+}