Always set a border-radius for RadioButton annotations (issue 15262)

src/display/annotation_layer.js

@@ -222,6 +222,9 @@ class AnnotationElement {
       if (horizontalRadius > 0 || verticalRadius > 0) {
         const radius = `calc(${horizontalRadius}px * var(--scale-factor)) / calc(${verticalRadius}px * var(--scale-factor))`;
         container.style.borderRadius = radius;
+      } else if (this instanceof RadioButtonWidgetAnnotationElement) {
+        const radius = `calc(${width}px * var(--scale-factor)) / calc(${height}px * var(--scale-factor))`;
+        container.style.borderRadius = radius;
       }
 
       switch (data.borderStyle.style) {

test/pdfs/.gitignore

@@ -481,6 +481,7 @@
 !issue11442_reduced.pdf
 !issue11549_reduced.pdf
 !issue8097_reduced.pdf
+!issue15262.pdf
 !bug1743245.pdf
 !quadpoints.pdf
 !transparent.pdf

test/test_manifest.json

@@ -2708,6 +2708,13 @@
        "lastPage": 33,
        "type": "eq"
     },
+    {  "id": "issue15262",
+       "file": "pdfs/issue15262.pdf",
+       "md5": "f33f73848cea3c7034457653d5cfb9be",
+       "rounds": 1,
+       "type": "eq",
+       "forms": true
+    },
     {  "id": "smaskdim",
       "file": "pdfs/smaskdim.pdf",
       "md5": "de80aeca7cbf79940189fd34d59671ee",