Wave Cushion

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500" width="100%"><defs><pattern id="blob-pattern" patternUnits="userSpaceOnUse" width="40" height="20"><path d="M0 8Q10 1 20 8Q30 15 40 8L40 13Q30 20 20 13Q10 6 0 13Z" fill="#f59e0b" fill-rule="evenodd"/></pattern></defs><path d="M426.5,332Q381,414,291.5,437.5Q202,461,118,407.5Q34,354,46.5,256Q59,158,134.5,117.5Q210,77,297.5,78.5Q385,80,428.5,165Q472,250,426.5,332Z" fill="url(#blob-pattern)"/></svg>

.blob {
  width: 500px;
  height: 500px;
  clip-path: path("M426.5,332Q381,414,291.5,437.5Q202,461,118,407.5Q34,354,46.5,256Q59,158,134.5,117.5Q210,77,297.5,78.5Q385,80,428.5,165Q472,250,426.5,332Z");
}

/**
 * Blob — generated by blobs.app.
 *
 * Drop this file into your project and render <Blob /> anywhere.
 */
import { useId } from 'react';

export interface BlobProps {
  /** Rendered width and height. A number is treated as px. Defaults to 100%. */
  size?: number | string;
  /** Class name for the root svg element. */
  className?: string;
  /** Accessible name. Without it the graphic is hidden from assistive tech. */
  title?: string;
}

export function Blob({ size = '100%', className, title }: BlobProps) {
  // Unique per instance, so two blobs on one page never share a def id.
  const uid = useId().replace(/[^a-zA-Z0-9]/g, '');
  const titleId = `blob-title-${uid}`;
  const patternId = `blob-pattern-${uid}`;

  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      viewBox="0 0 500 500"
      width={size}
      height={size}
      className={className}
      role={title ? 'img' : undefined}
      aria-labelledby={title ? titleId : undefined}
      aria-hidden={title ? undefined : true}
    >
      {title ? <title id={titleId}>{title}</title> : null}
      <defs>
        <pattern id={patternId} patternUnits="userSpaceOnUse" width="40" height="20">
          <path d="M0 8Q10 1 20 8Q30 15 40 8L40 13Q30 20 20 13Q10 6 0 13Z" fill="#f59e0b" fillRule="evenodd" />
        </pattern>
      </defs>
      <path
        d="M426.5,332Q381,414,291.5,437.5Q202,461,118,407.5Q34,354,46.5,256Q59,158,134.5,117.5Q210,77,297.5,78.5Q385,80,428.5,165Q472,250,426.5,332Z"
        fill={`url(#${patternId})`}
      />
    </svg>
  );
}

export default Blob;

// Generated by blobs.app.
//
// Paint the blob:
//   CustomPaint(painter: BlobPainter(), size: const Size(300, 300))
//
// Or clip a widget to it:
//   ClipPath(clipper: BlobClipper(), child: child)

import 'dart:ui' as ui;

import 'package:flutter/material.dart';

/// The blob outline, scaled from its 500x500 design space to [size].
Path buildBlobPath(Size size) {
  final double sx = size.width / 500.0;
  final double sy = size.height / 500.0;
  final Path path = Path();
  path.moveTo(426.5 * sx, 332.0 * sy);
  path.quadraticBezierTo(381.0 * sx, 414.0 * sy, 291.5 * sx, 437.5 * sy);
  path.quadraticBezierTo(202.0 * sx, 461.0 * sy, 118.0 * sx, 407.5 * sy);
  path.quadraticBezierTo(34.0 * sx, 354.0 * sy, 46.5 * sx, 256.0 * sy);
  path.quadraticBezierTo(59.0 * sx, 158.0 * sy, 134.5 * sx, 117.5 * sy);
  path.quadraticBezierTo(210.0 * sx, 77.0 * sy, 297.5 * sx, 78.5 * sy);
  path.quadraticBezierTo(385.0 * sx, 80.0 * sy, 428.5 * sx, 165.0 * sy);
  path.quadraticBezierTo(472.0 * sx, 250.0 * sy, 426.5 * sx, 332.0 * sy);
  path.close();
  return path;
}

class BlobPainter extends CustomPainter {
  const BlobPainter();

  @override
  void paint(Canvas canvas, Size size) {
    final Path path = buildBlobPath(size);
    // Pattern and image fills are not supported in this exporter; use the SVG export.
    final Paint paint = Paint()
      ..isAntiAlias = true
      ..color = const Color(0xFFF59E0B);
    canvas.drawPath(path, paint);
  }

  @override
  bool shouldRepaint(covariant BlobPainter oldDelegate) => false;
}

/// Clips any widget to the same shape: ClipPath(clipper: BlobClipper(), ...).
class BlobClipper extends CustomClipper<Path> {
  const BlobClipper();

  @override
  Path getClip(Size size) => buildBlobPath(size);

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