dispatchFull method

Implementation

@override
Uint8List dispatchFull(Uint8List data, int width, int height) {
  int cropTop = 0, cropLeft = 0, cropRight = 0, cropBottom = 0;
  final minSize = 10;
  // 垂直裁剪
  for (int i = 0; i < height - minSize; i++) {
    if (checkLine(data.getRange(i * width, (i + 1) * width).toList())) {
      cropTop++;
    } else {
      break;
    }
  }
  for (int i = height - 1; i > cropTop + minSize; i--) {
    if (checkLine(data.getRange(i * width, (i + 1) * width).toList())) {
      cropBottom++;
    } else {
      break;
    }
  }
  final newHeight = height - cropBottom - cropTop;

  // 横向裁剪
  for (int i = 0; i < width - minSize; i++) {
    if (checkLine(
      List.generate(newHeight, (l) => data[(l + cropTop) * width + i]),
    )) {
      cropLeft++;
    } else {
      break;
    }
  }
  for (int i = width - 1; i > cropLeft + minSize; i--) {
    if (checkLine(
      List.generate(newHeight, (l) => data[(l + cropTop) * width + i]),
    )) {
      cropRight++;
    } else {
      break;
    }
  }

  if (cropTop > 0 || cropLeft > 0 || cropRight > 0 || cropBottom > 0) {
    _cropRect =
        Rect(cropLeft, cropTop, width - cropRight, height - cropBottom);

    final newWidth = _cropRect!.width;
    final newHeight = _cropRect!.height;

    // math.max(math.min(newWidth, newHeight) * 0.1, 10).round();
    final padding = 0;
    final newData = Uint8List(
      (newWidth + padding * 2) * (newHeight + padding * 2),
    );
    //newData.fillRange(0, newData.length, wrapper);
    for (int i = 0; i < newHeight; i++) {
      final start = (i + cropTop) * width + cropLeft;
      List.copyRange(
        newData,
        (i + padding) * newWidth + padding,
        data,
        start,
        start + newWidth,
      );
    }
    lastColor = null;
    return newData;
  }
  return data;
}