Rose Tracery

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500" width="100%"><path d="M462.5,299.5Q456,349,417,379.5Q378,410,339.5,441.5Q301,473,249,477.5Q197,482,146.5,462.5Q96,443,65,398.5Q34,354,19,302Q4,250,28.5,202.5Q53,155,88,123Q123,91,161,60Q199,29,250,28Q301,27,349,46Q397,65,433.5,104.5Q470,144,469.5,197Q469,250,462.5,299.5Z" fill="none" stroke="#ef629f" stroke-width="7"/></svg>

.blob {
  width: 500px;
  height: 500px;
  clip-path: path("M462.5,299.5Q456,349,417,379.5Q378,410,339.5,441.5Q301,473,249,477.5Q197,482,146.5,462.5Q96,443,65,398.5Q34,354,19,302Q4,250,28.5,202.5Q53,155,88,123Q123,91,161,60Q199,29,250,28Q301,27,349,46Q397,65,433.5,104.5Q470,144,469.5,197Q469,250,462.5,299.5Z");
}

/**
 * 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}`;

  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}
      <path
        d="M462.5,299.5Q456,349,417,379.5Q378,410,339.5,441.5Q301,473,249,477.5Q197,482,146.5,462.5Q96,443,65,398.5Q34,354,19,302Q4,250,28.5,202.5Q53,155,88,123Q123,91,161,60Q199,29,250,28Q301,27,349,46Q397,65,433.5,104.5Q470,144,469.5,197Q469,250,462.5,299.5Z"
        fill="none"
        stroke="#ef629f"
        strokeWidth={7}
      />
    </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(462.5 * sx, 299.5 * sy);
  path.quadraticBezierTo(456.0 * sx, 349.0 * sy, 417.0 * sx, 379.5 * sy);
  path.quadraticBezierTo(378.0 * sx, 410.0 * sy, 339.5 * sx, 441.5 * sy);
  path.quadraticBezierTo(301.0 * sx, 473.0 * sy, 249.0 * sx, 477.5 * sy);
  path.quadraticBezierTo(197.0 * sx, 482.0 * sy, 146.5 * sx, 462.5 * sy);
  path.quadraticBezierTo(96.0 * sx, 443.0 * sy, 65.0 * sx, 398.5 * sy);
  path.quadraticBezierTo(34.0 * sx, 354.0 * sy, 19.0 * sx, 302.0 * sy);
  path.quadraticBezierTo(4.0 * sx, 250.0 * sy, 28.5 * sx, 202.5 * sy);
  path.quadraticBezierTo(53.0 * sx, 155.0 * sy, 88.0 * sx, 123.0 * sy);
  path.quadraticBezierTo(123.0 * sx, 91.0 * sy, 161.0 * sx, 60.0 * sy);
  path.quadraticBezierTo(199.0 * sx, 29.0 * sy, 250.0 * sx, 28.0 * sy);
  path.quadraticBezierTo(301.0 * sx, 27.0 * sy, 349.0 * sx, 46.0 * sy);
  path.quadraticBezierTo(397.0 * sx, 65.0 * sy, 433.5 * sx, 104.5 * sy);
  path.quadraticBezierTo(470.0 * sx, 144.0 * sy, 469.5 * sx, 197.0 * sy);
  path.quadraticBezierTo(469.0 * sx, 250.0 * sy, 462.5 * sx, 299.5 * sy);
  path.close();
  return path;
}

class BlobPainter extends CustomPainter {
  const BlobPainter();

  @override
  void paint(Canvas canvas, Size size) {
    final Path path = buildBlobPath(size);
    final Paint paint = Paint()
      ..isAntiAlias = true
      ..color = const Color(0xFFEF629F)
      ..style = PaintingStyle.stroke
      ..strokeWidth = 7.0 * (size.width / 500.0);
    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;
}