custom_clipper.dart

import 'package:flutter/material.dart';

class MyCustomClipper extends CustomClipper<Path> {
  @override
  Path getClip(Size size) {
    var w = size.width;
    var h = size.height;

    Path path = Path();
    path.lineTo(0, h);
    var firstStart = Offset(size.width / 5, size.height);
    var firstEnd = Offset(size.width / 2.25, size.height - 50);
    path.quadraticBezierTo(
      firstStart.dx,
      firstStart.dy,
      firstEnd.dx,
      firstEnd.dy,
    );
    var secondStart =
        Offset(size.width - (size.width / 3.4), size.height - 100);
    var secondEnd = Offset(size.width, size.height - 50);
    path.quadraticBezierTo(
      secondStart.dx,
      secondStart.dy,
      secondEnd.dx,
      secondEnd.dy,
    );
    path.lineTo(w, 0);
    path.close();

    return path;
  }

  @override
  bool shouldReclip(covariant CustomClipper<Path> oldClipper) {
    return false;
  }
}

class MyCustomClipper2 extends CustomClipper<Path> {
  @override
  Path getClip(Size size) {
    var w = size.width;
    var h = size.height;

    Path path = Path();
    // path.lineTo(w, h);
    path.quadraticBezierTo(w * .5, h, w, 0);

    path.close();

    return path;
  }

  @override
  bool shouldReclip(covariant CustomClipper<Path> oldClipper) {
    return false;
  }
}