use textdirection for gradient of ShapeDecoration (#77186)

packages/flutter/lib/src/painting/shape_decoration.dart

@@ -329,7 +329,7 @@ class _ShapeDecorationPainter extends BoxPainter {
         _interiorPaint!.color = _decoration.color!;
     }
     if (_decoration.gradient != null)
-      _interiorPaint!.shader = _decoration.gradient!.createShader(rect);
+      _interiorPaint!.shader = _decoration.gradient!.createShader(rect, textDirection: textDirection);
     if (_decoration.shadows != null) {
       if (_shadowCount == null) {
         _shadowCount = _decoration.shadows!.length;

packages/flutter/test/widgets/shape_decoration_test.dart

@@ -114,6 +114,32 @@ Future<void> main() async {
     );
   });
 
+  testWidgets('Does not crash with directional gradient', (WidgetTester tester) async {
+    // Regression test for https://github.com/flutter/flutter/issues/76967.
+
+    await tester.pumpWidget(
+      const Directionality(
+        textDirection: TextDirection.rtl,
+        child: DecoratedBox(
+          decoration: ShapeDecoration(
+            gradient: RadialGradient(
+              focal: AlignmentDirectional(0, 1),
+              focalRadius: 5,
+              radius: 2,
+              colors: <Color>[Colors.red, Colors.black],
+              stops: <double>[0.0, 0.4],
+            ),
+            shape: RoundedRectangleBorder(
+              borderRadius: BorderRadius.all(Radius.circular(8.0)),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    expect(tester.takeException(), isNull);
+  });
+
   test('ShapeDecoration equality', () {
     const ShapeDecoration a = ShapeDecoration(
       color: Color(0xFFFFFFFF),