Add border geometry as Path instead of loop for TextAnnotation frames (#9108)

Author: SheetalNair

common/changes/@itwin/core-backend/sheetalNair-fix-text-outline_2026-03-20-10-17.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@itwin/core-backend",
+      "comment": "Add outline geometry as Path instead of Loop in text annotations",
+      "type": "none"
+    }
+  ],
+  "packageName": "@itwin/core-backend"
+}

core/backend/src/annotations/FrameGeometry.ts

@@ -49,9 +49,8 @@ export function appendFrameToBuilder(builder: ElementGeometry.Builder, frame: Te
 
   // The tile generator does not produce an outline for shapes with blanking fill. We must add the outline separately.
   if (params.fillDisplay === FillDisplay.Blanking) {
-    const outlineParams = params.clone();
-    outlineParams.fillDisplay = FillDisplay.Never;
-    if (!builder.appendGeometryParamsChange(outlineParams) || !builder.appendGeometryQuery(frameGeometry)) {
+    const path = frameGeometry instanceof Loop ? Path.createArray(frameGeometry.children) : frameGeometry;
+    if (!builder.appendGeometryQuery(path)) {
       return false;
     }
   }

core/backend/src/test/annotations/FrameGeometry.test.ts

@@ -4,7 +4,7 @@
 *--------------------------------------------------------------------------------------------*/
 
 import { expect } from "chai";
-import { CurvePrimitive, Geometry, Point3d, Range2d, Transform, Vector3d } from "@itwin/core-geometry";
+import { CurvePrimitive, Geometry, Path, Point3d, Range2d, Transform, Vector3d } from "@itwin/core-geometry";
 import { ColorDef, GeometryParams, textAnnotationFrameShapes, TextFrameStyleProps } from "@itwin/core-common";
 import { appendFrameToBuilder, computeFrame } from "../../annotations/FrameGeometry";
 import { Id64 } from "@itwin/core-bentley";
@@ -46,6 +46,7 @@ describe("FrameGeometry", () => {
       const result = appendFrameToBuilder(builder, frame, defaultRange, defaultTransform, defaultParams);
       expect(result).to.be.true;
       expect(builder.geometries.length).to.be.equal(2);
+      expect(builder.geometries[1] instanceof Path).to.be.true; // The second geometry should be the outline geometry, which is a Path
     });
 
     it("should set fill and border colors from frame", () => {