flutter_vid/lib/us/vid_us_3d_visual.dart

import 'dart:typed_data';
import 'package:vid/us/vid_us_data_reader.dart';
import 'package:vid/us/vid_us_data_writer.dart';
import 'package:vid/us/vid_us_display_mode.dart';
import 'package:vid/us/vid_us_mode.dart';
import 'package:vid/us/vid_us_tissue_3d_area.dart';
import 'package:vid/us/vid_us_visual.dart';
import 'package:vid/us/vid_us_visual_indicator.dart';
import 'package:vid/us/vid_us_visual_type.dart';

class VidUs3DVisual extends VidUsVisual {
  late List<VidUsTissue3DArea> _tissue3DAreas;

  /// Gets the tissue 3d areas for this visual.
  List<VidUsTissue3DArea> get tissue3DAreas => _tissue3DAreas;

  VidUs3DVisual() {
    super.setVisualType(VidUsVisualType.V3D);
    _tissue3DAreas = [];
  }

  ///Convert VidUs3DVisual to binary data.
  @override
  Uint8List toBytes() {
    var baseData = super.toBytes();
    var writer = new VidUsDataWriter();
    writer.writeBytes(baseData);
    writer.writeByte(_tissue3DAreas.length);
    _tissue3DAreas.forEach((area) {
      writer.writeBytes(area.toBytes());
    });
    return writer.data;
  }

  ///Convert binary data to VidUs3DVisual.
  static VidUsVisual fromBytes(Uint8List bytes) {
    var reader = new VidUsDataReader(bytes);
    var visualType = VidUsVisualType.values[reader.readByte()];
    var displayMode = VidUsDisplayMode.values[reader.readByte()];
    if (visualType == VidUsVisualType.V3D) {
      var indicator = VidUsVisualIndicator.values[reader.readByte()];
      var visual = new VidUs3DVisual();
      visual.setIndicator(indicator);
      var activeModeType = VidUsModeType.values[reader.readByte()];
      var modeCount = reader.readByte();
      for (int i = 0; i < modeCount; i++) {
        var mode = VidUsMode.fromBytes(reader.readBytes());
        visual.modes.add(mode);
      }
      visual.setActiveModeType(activeModeType);
      var tissue3DAreaCount = reader.readByte();
      for (int i = 0; i < tissue3DAreaCount; i++) {
        var tissue3DArea = VidUsTissue3DArea.fromBytes(reader.readBytes());
        visual.tissue3DAreas.add(tissue3DArea);
      }
      visual.setDisplayMode(displayMode);
      return visual;
    }
    throw new Exception(
        "Can not restore visual data from $visualType to VidUs3DVisual.");
  }
}