[WIP] modifed CopyAnimation hook for SIFPAnimations

This is needed for unloading IFP. We'll use this to increment and decrement iReferences in SIFPAnimations when an animation association is created and destroyed respectively.

Author: codenulls

Client/multiplayer_sa/CMultiplayerSA.cpp

@@ -5384,20 +5384,42 @@ void _declspec(naked)  HOOK_CAnimBlendAssocGroup_CopyAnimation ()
     {
         _asm
         {
-            popad
+            popad                        
+ 
+            push    ecx
+            push    ebp   
+            mov     ebp, esp
+            sub esp, 4
+
             push    eax
             push    ecx
             push    edi
 
+            lea     eax, [ebp-4]
+            push    eax 
+
             // Allocate memory for our new static association
             call    AllocateStaticAssociationMemory
             mov     edi, eax
-            
+
             // push the static association
             push    edi
-            call    m_pAssocGroupCopyAnimationHandler //CAnimBlendAssocGroup_CopyAnimation
-            add     esp, 10h
+            call    m_pAssocGroupCopyAnimationHandler 
+            add     esp, 14h
+            
+            mov     ecx, [ebp-4] 
 
+            add     esp, 4 // remove space for local var
+            mov     esp, ebp
+            pop     ebp
+
+            // save eax and ecx for later to check whether current animation is custom or not 
+            // after calling FUNC_CAnimBlendAssociation_Constructor function
+            push    eax
+            push    ecx
+
+            // get "this" from stack that we pushed first
+            mov     ecx, [esp+8]
             mov     ecx, [ecx+4]
             sub     eax, edx
             push    esi
@@ -5413,9 +5435,9 @@ void _declspec(naked)  HOOK_CAnimBlendAssocGroup_CopyAnimation ()
             push    3Ch   
             call    FUNC_NEW_OPERATOR
             add     esp, 8
-            mov     [esp+14h], eax
+            mov     [esp+20h], eax 
             test    eax, eax
-            mov     [esp+0Ch], 0
+            mov     [esp+18h], 0   
             jz      ERROR_CopyAnimation
             push    esi
             mov     ecx, eax
@@ -5427,8 +5449,19 @@ void _declspec(naked)  HOOK_CAnimBlendAssocGroup_CopyAnimation ()
             call    DeleteStaticAssociation
             add     esp, 4 
 
+            pop     ecx
+            pop     eax 
+            
+            // Check wether this is a custom animation or not 
+            cmp     al, 0
+            je      NOT_CUSTOM_ANIMATION_CopyAnimation  
+
+            // It's a custom animation, store it in a map
+            
+            NOT_CUSTOM_ANIMATION_CopyAnimation: 
             // put CAnimBlendAssociation in eax
             mov     eax, edi
+            add     esp, 4
             jmp     RETURN_CAnimBlendAssocGroup_CopyAnimation
 
             ERROR_CopyAnimation: