fix: fallback for small window levels

cornerstonejs · Dec 18, 2024 · eeb59e8 · eeb59e8
1 parent dcb9f77
commit eeb59e8
Showing 1 changed file with 11 additions and 3 deletions.
diff --git a/packages/core/src/utilities/windowLevel.ts b/packages/core/src/utilities/windowLevel.ts
@@ -41,10 +41,18 @@ function toLowHighRange(
   lower: number;
   upper: number;
 } {
-  const lower = windowCenter - 0.5 - (windowWidth - 1) / 2;
-  const upper = windowCenter - 0.5 + (windowWidth - 1) / 2;
+  if (windowWidth < 1 || windowCenter < 1) {
+    // use fallback
+    return {
+      lower: windowCenter - windowWidth / 2,
+      upper: windowCenter + windowWidth / 2,
+    };
+  }
 
-  return { lower, upper };
+  return {
+    lower: windowCenter - 0.5 - (windowWidth - 1) / 2,
+    upper: windowCenter - 0.5 + (windowWidth - 1) / 2,
+  };
 }
 
 export { toWindowLevel, toLowHighRange };