Get xy , width and rotation angle

[simranKa]

I am using this widget in video editing app. I have implemented it successfully but not getting how to get left,top, width and roatation angle to save video with watermark. This is my code:

MatrixGestureDetector(
onMatrixUpdate: (m, tm, sm, rm) {
controller.matrix = MatrixGestureDetector.compose(m, tm, sm, rm);
notifier.value++;
},
child: AspectRatio(
aspectRatio: controller.aspectRatio.value != 0.0 ? controller.aspectRatio.value : controller.controller.video.value.aspectRatio,
child: AnimatedBuilder(
animation: notifier,
builder: (ctx, child) {
return Transform(
transform: controller.matrix,
child: MeasureSize(
onChange: (Size size) { controller.size = size; },
child: FittedBox(
fit: BoxFit.contain,
child: controller.icon == null ? CustomPaint(
painter: DottedBorderPainter(),
child: Obx(() => Container(
color: Color(controller.bgColor.value != 0 ? controller.bgColor.value : Colors.transparent.value),
margin: const EdgeInsets.all(4),
padding: const EdgeInsets.all(4),
child: Center(
child: Text(key: controller.textKey, controller.text,
style: TextStyle(fontSize: 33.5,
color: Color(controller.textColor.value != 0 ? controller.textColor.value : Colors.black.value))),
),
)),
)
: Container(key: controller.key, child: Image.network(controller.icon!))
),
),
);
},
),
),
)

and I have used :
var x = MatrixUtils.transformRect(matrix, key.currentContext!.findRenderObject()!.paintBounds).left;
var y = MatrixUtils.transformRect(matrix, key.currentContext!.findRenderObject()!.paintBounds).top;

   var width = MatrixUtils.transformRect(matrix, key.currentContext!.findRenderObject()!.paintBounds).width;

to get corrdinates and width and not sure about rotation but these are not working