downloadResizePictureCircle static method

Future<BitmapDescriptor> downloadResizePictureCircle(String imageUrl, { int size = 150, bool addBorder = false, Color borderColor = Colors.white, double borderSize = 10, })

Implementation

static Future<BitmapDescriptor> downloadResizePictureCircle(
  String imageUrl, {
  int size = 150,
  bool addBorder = false,
  Color borderColor = Colors.white,
  double borderSize = 10,
}) async {
  final File imageFile = await DefaultCacheManager().getSingleFile(imageUrl);

  final ui.PictureRecorder pictureRecorder = ui.PictureRecorder();
  final Canvas canvas = Canvas(pictureRecorder);
  final Paint paint = Paint()..color;

  final double radius = size / 2;

  //make canvas clip path to prevent image drawing over the circle
  final Path clipPath = Path();
  clipPath
      .addRRect(RRect.fromRectAndRadius(Rect.fromLTWH(0, 0, size.toDouble(), size.toDouble()), Radius.circular(100)));
  /* clipPath.addRRect(RRect.fromRectAndRadius(
      Rect.fromLTWH(0, size * 8 / 10, size.toDouble(), size * 3 / 10),
      Radius.circular(100))); */
  canvas.clipPath(clipPath);

  //paintImage
  final Uint8List imageUint8List = await imageFile.readAsBytes();
  final ui.Codec codec = await ui.instantiateImageCodec(imageUint8List);
  final ui.FrameInfo imageFI = await codec.getNextFrame();
  paintImage(
      fit: BoxFit.cover,
      alignment: Alignment.center,
      canvas: canvas,
      rect: Rect.fromLTWH(0, 0, size.toDouble(), size.toDouble()),
      image: imageFI.image);

  if (addBorder) {
    //draw Border
    paint..color = borderColor;
    paint..style = PaintingStyle.stroke;
    paint..strokeWidth = borderSize;
    canvas.drawCircle(Offset(radius, radius), radius, paint);
  }

  //convert canvas as PNG bytes
  final _image = await pictureRecorder.endRecording().toImage(size, (size * 1.1).toInt());
  final data = await _image.toByteData(format: ui.ImageByteFormat.png);

  //convert PNG bytes as BitmapDescriptor
  return BitmapDescriptor.fromBytes(data!.buffer.asUint8List());
}