From 4f0816b47e8fec4ede7bfc0c4b4817cb67489f7a Mon Sep 17 00:00:00 2001
From: Robert Longson <longsonr@gmail.com>
Date: Fri, 16 Feb 2024 12:08:15 +0000
Subject: [PATCH] BATIK-1102 - avoid dividing by zero when processing
 particular feTurbulence seed values

---
 .../batik/ext/awt/image/rendered/TurbulencePatternRed.java  | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/batik-awt-util/src/main/java/org/apache/batik/ext/awt/image/rendered/TurbulencePatternRed.java b/batik-awt-util/src/main/java/org/apache/batik/ext/awt/image/rendered/TurbulencePatternRed.java
index 9096ec6a60..7c7081e009 100644
--- a/batik-awt-util/src/main/java/org/apache/batik/ext/awt/image/rendered/TurbulencePatternRed.java
+++ b/batik-awt-util/src/main/java/org/apache/batik/ext/awt/image/rendered/TurbulencePatternRed.java
@@ -263,8 +263,10 @@ private void initLattice(int seed) {
 
         for(k = 0; k < 4; k++){
             for(i = 0; i < BSize; i++){
-                u = (((seed = random(seed)) % (BSize + BSize)) - BSize);
-                v = (((seed = random(seed)) % (BSize + BSize)) - BSize);
+                do{
+                    u = (((seed = random(seed)) % (BSize + BSize)) - BSize);
+                    v = (((seed = random(seed)) % (BSize + BSize)) - BSize);
+                }while(u == 0 && v == 0);
 
                 s = 1/Math.sqrt(u*u + v*v);
                 gradient[i*8 + k*2    ] = u*s;