From 970bd1abb1f4c21b507658ee31494a6da45d75a9 Mon Sep 17 00:00:00 2001
From: David Vierra <codewarrior@hawaii.rr.com>
Date: Sun, 15 Jan 2017 22:36:35 -1000
Subject: [PATCH] Eliminate pointless redraws in receiveMetaTileEntityData

---
 .../metatileentity/BaseMetaPipeEntity.java    | 36 +++++++++++++++----
 .../metatileentity/BaseMetaTileEntity.java    | 36 +++++++++++++++----
 2 files changed, 58 insertions(+), 14 deletions(-)

diff --git a/src/main/java/gregtech/api/metatileentity/BaseMetaPipeEntity.java b/src/main/java/gregtech/api/metatileentity/BaseMetaPipeEntity.java
index 0d72f60e..7ad7e409 100644
--- a/src/main/java/gregtech/api/metatileentity/BaseMetaPipeEntity.java
+++ b/src/main/java/gregtech/api/metatileentity/BaseMetaPipeEntity.java
@@ -327,18 +327,38 @@ public class BaseMetaPipeEntity extends BaseTileEntity implements IGregTechTileE
     }
 
     public final void receiveMetaTileEntityData(short aID, int aCover0, int aCover1, int aCover2, int aCover3, int aCover4, int aCover5, byte aTextureData, byte aUpdateData, byte aRedstoneData, byte aColorData) {
-        issueTextureUpdate();
+        boolean tNeedsRedraw = false;
         if (aID > 0 && mID != aID) {
             mID = aID;
             createNewMetatileEntity(mID);
+            tNeedsRedraw = true;
         }
 
-        mCoverSides[0] = aCover0;
-        mCoverSides[1] = aCover1;
-        mCoverSides[2] = aCover2;
-        mCoverSides[3] = aCover3;
-        mCoverSides[4] = aCover4;
-        mCoverSides[5] = aCover5;
+
+        if (mCoverSides[0] != aCover0) {
+            mCoverSides[0] = aCover0;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[1] != aCover1) {
+            mCoverSides[1] = aCover1;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[2] != aCover2) {
+            mCoverSides[2] = aCover2;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[3] != aCover3) {
+            mCoverSides[3] = aCover3;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[4] != aCover4) {
+            mCoverSides[4] = aCover4;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[5] != aCover5) {
+            mCoverSides[5] = aCover5;
+            tNeedsRedraw = true;
+        }
 
         for (byte i = 0; i < 6; i++) mCoverBehaviors[i] = GregTech_API.getCoverBehavior(mCoverSides[i]);
 
@@ -346,6 +366,8 @@ public class BaseMetaPipeEntity extends BaseTileEntity implements IGregTechTileE
         receiveClientEvent(1, aUpdateData);
         receiveClientEvent(2, aColorData);
         receiveClientEvent(3, aRedstoneData);
+
+        if (tNeedsRedraw) issueTextureUpdate();
     }
 
     @Override
diff --git a/src/main/java/gregtech/api/metatileentity/BaseMetaTileEntity.java b/src/main/java/gregtech/api/metatileentity/BaseMetaTileEntity.java
index deaba416..1ae432cf 100644
--- a/src/main/java/gregtech/api/metatileentity/BaseMetaTileEntity.java
+++ b/src/main/java/gregtech/api/metatileentity/BaseMetaTileEntity.java
@@ -594,19 +594,38 @@ public class BaseMetaTileEntity extends BaseTileEntity implements IGregTechTileE
     }
 
     public final void receiveMetaTileEntityData(short aID, int aCover0, int aCover1, int aCover2, int aCover3, int aCover4, int aCover5, byte aTextureData, byte aUpdateData, byte aRedstoneData, byte aColorData) {
-        issueTextureUpdate();
+        boolean tNeedsRedraw = false;
         if (mID != aID && aID > 0) {
             mID = aID;
             createNewMetatileEntity(mID);
+            tNeedsRedraw = true;
         }
 
 
-        mCoverSides[0] = aCover0;
-        mCoverSides[1] = aCover1;
-        mCoverSides[2] = aCover2;
-        mCoverSides[3] = aCover3;
-        mCoverSides[4] = aCover4;
-        mCoverSides[5] = aCover5;
+        if (mCoverSides[0] != aCover0) {
+            mCoverSides[0] = aCover0;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[1] != aCover1) {
+            mCoverSides[1] = aCover1;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[2] != aCover2) {
+            mCoverSides[2] = aCover2;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[3] != aCover3) {
+            mCoverSides[3] = aCover3;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[4] != aCover4) {
+            mCoverSides[4] = aCover4;
+            tNeedsRedraw = true;
+        }
+        if (mCoverSides[5] != aCover5) {
+            mCoverSides[5] = aCover5;
+            tNeedsRedraw = true;
+        }
 
         for (byte i = 0; i < 6; i++) mCoverBehaviors[i] = GregTech_API.getCoverBehavior(mCoverSides[i]);
 
@@ -614,6 +633,9 @@ public class BaseMetaTileEntity extends BaseTileEntity implements IGregTechTileE
         receiveClientEvent(1, aUpdateData);
         receiveClientEvent(2, aColorData);
         receiveClientEvent(3, aRedstoneData);
+
+        if (tNeedsRedraw) issueTextureUpdate();
+
     }
 
     @Override