Add IconCache

IconCache.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using Dalamud.Interface.Internal;
+using Dalamud.Plugin.Services;
+
+namespace LLib;
+
+public sealed class IconCache : IDisposable
+{
+    private readonly ITextureProvider _textureProvider;
+    private readonly Dictionary<uint, TextureContainer> _textureWraps = new();
+
+    public IconCache(ITextureProvider textureProvider)
+    {
+        _textureProvider = textureProvider;
+    }
+
+    public IDalamudTextureWrap? GetIcon(uint iconId)
+    {
+        if (_textureWraps.TryGetValue(iconId, out TextureContainer? container))
+            return container.Texture;
+
+        var iconTex = _textureProvider.GetIcon(iconId);
+        if (iconTex != null)
+        {
+            if (iconTex.ImGuiHandle != nint.Zero)
+            {
+                _textureWraps[iconId] = new TextureContainer { Texture = iconTex };
+                return iconTex;
+            }
+
+            iconTex.Dispose();
+        }
+
+        _textureWraps[iconId] = new TextureContainer { Texture = null };
+        return null;
+    }
+
+    public void Dispose()
+    {
+        foreach (TextureContainer container in _textureWraps.Values)
+            container.Dispose();
+
+        _textureWraps.Clear();
+    }
+
+    private sealed class TextureContainer : IDisposable
+    {
+        public required IDalamudTextureWrap? Texture { get; init; }
+
+        public void Dispose() => Texture?.Dispose();
+    }
+}