From df082c39a38a7517326897d5aff0ea30df6cca16 Mon Sep 17 00:00:00 2001
From: Anuken <arnukren@gmail.com>
Date: Wed, 8 Jun 2022 09:36:08 -0400
Subject: [PATCH] Fixed #6865 / Fixed headless canvas crash

---
 core/src/mindustry/graphics/BlockRenderer.java         | 2 ++
 core/src/mindustry/world/blocks/logic/CanvasBlock.java | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/core/src/mindustry/graphics/BlockRenderer.java b/core/src/mindustry/graphics/BlockRenderer.java
index 2e58f125f8..6ecce7e478 100644
--- a/core/src/mindustry/graphics/BlockRenderer.java
+++ b/core/src/mindustry/graphics/BlockRenderer.java
@@ -110,6 +110,8 @@ public class BlockRenderer{
         });
 
         Events.on(TilePreChangeEvent.class, event -> {
+            if(blockTree == null || floorTree == null) return;
+
             if(indexBlock(event.tile)) blockTree.remove(event.tile);
             if(indexFloor(event.tile)) floorTree.remove(event.tile);
         });
diff --git a/core/src/mindustry/world/blocks/logic/CanvasBlock.java b/core/src/mindustry/world/blocks/logic/CanvasBlock.java
index 791f54ce56..a74316bb8d 100644
--- a/core/src/mindustry/world/blocks/logic/CanvasBlock.java
+++ b/core/src/mindustry/world/blocks/logic/CanvasBlock.java
@@ -56,6 +56,8 @@ public class CanvasBlock extends Block{
         public byte[] data = new byte[Mathf.ceil(canvasSize * canvasSize * bitsPerPixel / 8f)];
 
         public void updateTexture(){
+            if(headless) return;
+
             Pixmap pix = makePixmap();
             if(texture != null){
                 texture.draw(pix);