From 80578595a5ec9d278702bb0aea0c0dea62f75824 Mon Sep 17 00:00:00 2001
From: Forrest <forrest.li@kitware.com>
Date: Tue, 10 Sep 2024 12:50:51 -0400
Subject: [PATCH] fix(SurfaceLIC): guard against undefined framebuf

---
 .../OpenGL/SurfaceLIC/LineIntegralConvolution2D/index.js        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sources/Rendering/OpenGL/SurfaceLIC/LineIntegralConvolution2D/index.js b/Sources/Rendering/OpenGL/SurfaceLIC/LineIntegralConvolution2D/index.js
index 76b1fbe0a4c..0e925117326 100644
--- a/Sources/Rendering/OpenGL/SurfaceLIC/LineIntegralConvolution2D/index.js
+++ b/Sources/Rendering/OpenGL/SurfaceLIC/LineIntegralConvolution2D/index.js
@@ -202,7 +202,7 @@ function vtkLineIntegralConvolution2D(publicAPI, model) {
     const gl = model.context;
 
     let fb = model.framebuffer;
-    const fbSize = fb.getSize();
+    const fbSize = fb?.getSize();
     if (!fb || !fbSize || size[0] !== fbSize || size[1] !== fbSize) {
       fb = vtkFrameBuffer.newInstance();
       fb.setOpenGLRenderWindow(model._openGLRenderWindow);