From d83e935a1425063574a75d1decdaa62ed5b53e8b Mon Sep 17 00:00:00 2001
From: "aliaksei.kalosha" <aliaksei.kalosha@outlook.com>
Date: Tue, 18 Mar 2025 12:41:59 +0100
Subject: [PATCH] add check to not recalculate the same textures twice

---
 Runtime/PSXObjectExporter.cs |  7 +++++--
 Runtime/PSXTexture2D.cs      | 11 +++++++++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/Runtime/PSXObjectExporter.cs b/Runtime/PSXObjectExporter.cs
index 371c973..f1da72a 100644
--- a/Runtime/PSXObjectExporter.cs
+++ b/Runtime/PSXObjectExporter.cs
@@ -19,8 +19,11 @@ namespace SplashEdit.RuntimeCode
             Renderer renderer = GetComponent<Renderer>();
             if (renderer.sharedMaterial != null && renderer.sharedMaterial.mainTexture is Texture2D texture)
             {
-                Texture = PSXTexture2D.CreateFromTexture2D(texture, BitDepth);
-                Texture.OriginalTexture = texture; // Stores reference to the original texture
+                if (Texture == null || Texture.NeedUpdate(BitDepth, texture))
+                {
+                    Texture = PSXTexture2D.CreateFromTexture2D(texture, BitDepth);
+                    Texture.OriginalTexture = texture; // Stores reference to the original texture
+                }
             }
             else
             {
diff --git a/Runtime/PSXTexture2D.cs b/Runtime/PSXTexture2D.cs
index 975b26b..34dd54a 100644
--- a/Runtime/PSXTexture2D.cs
+++ b/Runtime/PSXTexture2D.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using UnityEngine;
 
@@ -275,5 +276,15 @@ namespace SplashEdit.RuntimeCode
             return vramTexture;
 
         }
+        /// <summary>
+        /// Check if we need to update stored texture
+        /// </summary>
+        /// <param name="bitDepth">new settings for color bit depth</param>
+        /// <param name="texture">new texture</param>
+        /// <returns>return true if sored texture is different from a new one</returns>
+        internal bool NeedUpdate(PSXBPP bitDepth, Texture2D texture)
+        {
+            return BitDepth != bitDepth || texture.GetInstanceID() != texture.GetInstanceID();
+        }
     }
 }
\ No newline at end of file