/// <summary>
/// Converts colour pixel data to ARGB.
/// </summary>
protected static byte[] ToArgb(IDicomAttributeProvider dicomAttributeProvider, byte[] pixelData, PhotometricInterpretation photometricInterpretation)
{
CodeClock clock = new CodeClock();
clock.Start();
int rows = dicomAttributeProvider[DicomTags.Rows].GetInt32(0, 0);
int columns = dicomAttributeProvider[DicomTags.Columns].GetInt32(0, 0);
int sizeInBytes = rows * columns * 4;
byte[] argbPixelData = MemoryManager.Allocate <byte>(sizeInBytes);
// Convert palette colour images to ARGB so we don't get interpolation artifacts
// when rendering.
if (photometricInterpretation == PhotometricInterpretation.PaletteColor)
{
int bitsAllocated = dicomAttributeProvider[DicomTags.BitsAllocated].GetInt32(0, 0);
int pixelRepresentation = dicomAttributeProvider[DicomTags.PixelRepresentation].GetInt32(0, 0);
ColorSpaceConverter.ToArgb(
bitsAllocated,
pixelRepresentation != 0 ? true : false,
pixelData,
argbPixelData,
PaletteColorMap.Create(dicomAttributeProvider));
}
// Convert RGB and YBR variants to ARGB
else
{
int planarConfiguration = dicomAttributeProvider[DicomTags.PlanarConfiguration].GetInt32(0, 0);
ColorSpaceConverter.ToArgb(
photometricInterpretation,
planarConfiguration,
pixelData,
argbPixelData);
}
clock.Stop();
PerformanceReportBroker.PublishReport("DicomMessageSopDataSource", "ToArgb", clock.Seconds);
return(argbPixelData);
}
public PixelData GetPixelData()
{
if (!IsColor)
{
byte[] pixelData = PixelData ?? new byte[Rows * Columns * BitsAllocated / 8];
return(new GrayscalePixelData(Rows, Columns, BitsAllocated, BitsStored,
HighBit, PixelRepresentation != 0, pixelData));
}
else
{
if (PixelData == null)
{
return(new ColorPixelData(Rows, Columns, new byte[Rows * Columns * 4]));
}
else
{
byte[] original = PixelData;
byte[] argb = new byte[Rows * Columns * 4];
ColorSpaceConverter.ToArgb(InternalPhotometricInterpretation, PlanarConfiguration, original, argb);
return(new ColorPixelData(Rows, Columns, argb));
}
}
}