From ab3cc6dc78d56cd1a790ae16d158697343de5bac Mon Sep 17 00:00:00 2001
From: pmgr <26606291+pmgr@users.noreply.github.com>
Date: Sun, 21 Feb 2021 03:39:36 +0000
Subject: [PATCH] Implement reloading eqdp, gmp, awt, etc.

---
 Penumbra/Game/GameUtils.cs                   | 51 +++++++++++++++++++-
 Penumbra/Structs/CharacterResourceManager.cs | 13 +++++
 2 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 Penumbra/Structs/CharacterResourceManager.cs

diff --git a/Penumbra/Game/GameUtils.cs b/Penumbra/Game/GameUtils.cs
index 95eb89fc..6536605f 100644
--- a/Penumbra/Game/GameUtils.cs
+++ b/Penumbra/Game/GameUtils.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Runtime.InteropServices;
 using Dalamud.Plugin;
+using Penumbra.Structs;
 using Reloaded.Hooks.Definitions.X64;
 
 namespace Penumbra.Game
@@ -13,13 +14,24 @@ public class GameUtils
         [Function( CallingConventions.Microsoft )]
         public unsafe delegate void* UnloadPlayerResourcesPrototype( IntPtr pResourceManager );
 
+        [Function( CallingConventions.Microsoft )]
+        public unsafe delegate void* LoadCharacterResourcesPrototype( CharacterResourceManager *pCharacterResourceManager );
+
+        [Function( CallingConventions.Microsoft )]
+        public unsafe delegate void* UnloadCharacterResourcePrototype( IntPtr resource );
+
 
         public LoadPlayerResourcesPrototype LoadPlayerResources { get; }
         public UnloadPlayerResourcesPrototype UnloadPlayerResources { get; }
+        public LoadCharacterResourcesPrototype LoadCharacterResources { get; }
+        public UnloadCharacterResourcePrototype UnloadCharacterResource { get; }
 
         // Object addresses
         private readonly IntPtr _playerResourceManagerAddress;
         public IntPtr PlayerResourceManagerPtr => Marshal.ReadIntPtr( _playerResourceManagerAddress );
+        private readonly IntPtr _characterResourceManagerAddress;
+        public unsafe CharacterResourceManager* CharacterResourceManagerPtr =>
+            ( CharacterResourceManager* )Marshal.ReadIntPtr( _characterResourceManagerAddress ).ToPointer();
 
         public GameUtils( DalamudPluginInterface pluginInterface )
         {
@@ -30,17 +42,54 @@ public GameUtils( DalamudPluginInterface pluginInterface )
                     "E8 ?? ?? ?? ?? 48 8B 05 ?? ?? ?? ?? BA ?? ?? ?? ?? 41 B8 ?? ?? ?? ?? 48 8B 48 30 48 8B 01 FF 50 10 48 85 C0 74 0A " );
             var unloadPlayerResourcesAddress =
                 scanner.ScanText( "41 55 48 81 EC ?? ?? ?? ?? 48 8B 05 ?? ?? ?? ?? 48 33 C4 48 89 84 24 ?? ?? ?? ?? 4C 8B E9 48 83 C1 08" );
+            var loadCharacterResourcesAddress = scanner.ScanText( "E8 ?? ?? ?? 00 48 8D 8E ?? ?? 00 00 E8 ?? ?? ?? 00 33 D2" );
+            var unloadCharacterResourceAddress = scanner.ScanText( "E8 ?? ?? ?? FF 4C 89 37 48 83 C7 08 48 83 ED 01 75 ?? 48 8B CB" );
 
-            _playerResourceManagerAddress = scanner.GetStaticAddressFromSig( "0F 44 FE 48 8B 0D ?? ?? ?? ?? 48 85 C9 74 05" );
+                _playerResourceManagerAddress = scanner.GetStaticAddressFromSig( "0F 44 FE 48 8B 0D ?? ?? ?? ?? 48 85 C9 74 05" );
+            _characterResourceManagerAddress = scanner.GetStaticAddressFromSig( "48 8B 0D ?? ?? ?? ?? E8 ?? ?? ?? 00 48 8D 8E ?? ?? 00 00 E8 ?? ?? ?? 00 33 D2" );
 
             LoadPlayerResources   = Marshal.GetDelegateForFunctionPointer< LoadPlayerResourcesPrototype >( loadPlayerResourcesAddress );
             UnloadPlayerResources = Marshal.GetDelegateForFunctionPointer< UnloadPlayerResourcesPrototype >( unloadPlayerResourcesAddress );
+            LoadCharacterResources = Marshal.GetDelegateForFunctionPointer< LoadCharacterResourcesPrototype >( loadCharacterResourcesAddress );
+            UnloadCharacterResource = Marshal.GetDelegateForFunctionPointer<UnloadCharacterResourcePrototype>( unloadCharacterResourceAddress );
         }
 
         public unsafe void ReloadPlayerResources()
         {
+            ReloadCharacterResources();
+
             UnloadPlayerResources( PlayerResourceManagerPtr );
             LoadPlayerResources( PlayerResourceManagerPtr );
         }
+
+        public unsafe string ResourceToPath( byte *resource ) =>
+            Marshal.PtrToStringAnsi( new IntPtr( *(char **)( resource + 9 * 8 ) ) );
+
+            public unsafe void ReloadCharacterResources()
+        {
+            var oldResources = new IntPtr[85];
+            var resources = new IntPtr(&CharacterResourceManagerPtr->Resources);
+            var pResources = (void **)resources.ToPointer();
+
+            Marshal.Copy( resources, oldResources, 0, 85 );
+
+            LoadCharacterResources( CharacterResourceManagerPtr );
+
+            for( var i = 0; i < 85; i++ )
+            {
+                if( oldResources[ i ].ToPointer() == pResources[ i ] )
+                {
+                    PluginLog.Debug($"Unchanged resource: {ResourceToPath( ( byte* )oldResources[i].ToPointer() )}");
+                    continue;
+                }
+
+                PluginLog.Debug( "Freeing " +
+                    $"{ResourceToPath( ( byte* )oldResources[i].ToPointer() )}, replaced with " +
+                    $"{ResourceToPath( ( byte* )pResources[i] )}" );
+
+                UnloadCharacterResource( oldResources[ i ] );
+            }
+
+        }
     }
 }
\ No newline at end of file
diff --git a/Penumbra/Structs/CharacterResourceManager.cs b/Penumbra/Structs/CharacterResourceManager.cs
new file mode 100644
index 00000000..d21f04dc
--- /dev/null
+++ b/Penumbra/Structs/CharacterResourceManager.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Penumbra.Structs
+{
+    [StructLayout( LayoutKind.Sequential )]
+    public unsafe struct CharacterResourceManager
+    {
+        public void* VTable;
+
+        public IntPtr Resources; // Size: 85, I hate C#
+    }
+}
\ No newline at end of file