/// <summary>
/// Initialize new instance of EncapsulatedPixelData with new empty pixel data.
/// </summary>
/// <param name="dataset">The source dataset where to create new pixel data.</param>
/// <param name="bitsAllocated">Bits allocated for the pixel data.</param>
public EncapsulatedPixelData(DicomDataset dataset, int bitsAllocated)
: base(dataset)
{
NumberOfFrames = 0;
_element = bitsAllocated > 8
? (DicomFragmentSequence) new DicomOtherWordFragment(DicomTag.PixelData)
: new DicomOtherByteFragment(DicomTag.PixelData);
Dataset.AddOrUpdate(_element);
}
/// <summary>
/// Method to call before performing the actual saving.
/// </summary>
protected override void OnSave()
{
if (RootDirectoryRecord == null)
{
throw new InvalidOperationException("No DICOM files added, cannot save DICOM directory");
}
_directoryRecordSequence.Items.Clear();
var calculator = new DicomWriteLengthCalculator(FileMetaInfo.TransferSyntax, DicomWriteOptions.Default);
//Add the offset for the Directory Record sequence tag itself
if (FileMetaInfo.TransferSyntax.IsExplicitVR)
{
_fileOffset = 128 + calculator.Calculate(FileMetaInfo) + calculator.Calculate(Dataset);
_fileOffset += 2; // vr
_fileOffset += 2; // padding
_fileOffset += 4; // length
}
else
{
_fileOffset = 128 + 4 + calculator.Calculate(FileMetaInfo) + calculator.Calculate(Dataset);
_fileOffset += 4; //sequence element tag
_fileOffset += 4; //length
}
AddDirectoryRecordsToSequenceItem(RootDirectoryRecord);
if (RootDirectoryRecord != null)
{
CalculateOffsets(calculator);
SetOffsets(RootDirectoryRecord);
Dataset.AddOrUpdate <uint>(
DicomTag.OffsetOfTheFirstDirectoryRecordOfTheRootDirectoryEntity,
RootDirectoryRecord.Offset);
var lastRoot = RootDirectoryRecord;
while (lastRoot.NextDirectoryRecord != null)
{
lastRoot = lastRoot.NextDirectoryRecord;
}
Dataset.AddOrUpdate <uint>(DicomTag.OffsetOfTheLastDirectoryRecordOfTheRootDirectoryEntity, lastRoot.Offset);
}
else
{
Dataset.AddOrUpdate <uint>(DicomTag.OffsetOfTheFirstDirectoryRecordOfTheRootDirectoryEntity, 0);
Dataset.AddOrUpdate <uint>(DicomTag.OffsetOfTheLastDirectoryRecordOfTheRootDirectoryEntity, 0);
}
}
/// <summary>
/// Initialize new instance of EncapsulatedPixelData
/// </summary>
/// <param name="dataset">The source dataset to extract from or create new pixel data for</param>
/// <param name="newPixelData">True to create new pixel data, false to read pixel data</param>
public EncapsulatedPixelData(DicomDataset dataset, bool newPixelData)
: base(dataset)
{
if (newPixelData)
{
NumberOfFrames = 0;
Element = new DicomOtherByteFragment(DicomTag.PixelData);
Dataset.AddOrUpdate(Element);
}
else
{
Element = dataset.Get <DicomFragmentSequence>(DicomTag.PixelData);
}
}
/// <summary>
/// Initialize new instance of OtherWordPixelData
/// </summary>
/// <param name="dataset">The source dataset to extract from or create new pixel data for</param>
/// <param name="newPixelData">True to create new pixel data, false to read pixel data</param>
public OtherWordPixelData(DicomDataset dataset, bool newPixelData)
: base(dataset)
{
if (newPixelData)
{
NumberOfFrames = 0;
Element = new DicomOtherWord(DicomTag.PixelData, new CompositeByteBuffer());
Dataset.AddOrUpdate(Element);
}
else
{
Element = dataset.Get <DicomOtherWord>(DicomTag.PixelData);
}
}
/// <summary>
/// Initialize new instance of OtherBytePixelData
/// </summary>
/// <param name="dataset">The source dataset to extract from or create new pixel data for</param>
/// <param name="newPixelData">True to create new pixel data, false to read pixel data</param>
public OtherBytePixelData(DicomDataset dataset, bool newPixelData)
: base(dataset)
{
if (newPixelData)
{
NumberOfFrames = 0;
_element = new DicomOtherByte(DicomTag.PixelData, new CompositeByteBuffer());
Dataset.AddOrUpdate(_element);
}
else
{
_element = dataset.GetDicomItem <DicomOtherByte>(DicomTag.PixelData);
}
}
