private static bool[] CreateOverlayData(FrameDataGetter frameDataGetter, int frameCount)
{
bool[] overlayData = null;
for (int n = 0; n < frameCount; n++)
{
var frameData = frameDataGetter.Invoke(n + 1);
if (overlayData == null)
{
overlayData = new bool[frameData.Length*frameCount];
}
var cursor = frameData.Length*n;
for (int i = 0; i < frameData.Length; i++)
{
overlayData[cursor++] = frameData[i] > 0.5f;
}
}
return overlayData;
}
private static byte[] CreatePixelData(FrameDataGetter frameDataGetter, int frameCount, int bitsAllocated, int bitsStored, int highBit, bool isSigned)
{
if (bitsAllocated != 8 && bitsAllocated != 16)
throw new ArgumentException("bitsAllocated must be either 8 or 16.", "bitsAllocated");
byte[] pixelData = null;
for (int n = 0; n < frameCount; n++)
{
var frameData = frameDataGetter.Invoke(n + 1);
if (pixelData == null)
{
pixelData = new byte[frameData.Length*frameCount*bitsAllocated/8];
}
int min = DicomPixelData.GetMinPixelValue(bitsStored, isSigned);
int max = DicomPixelData.GetMaxPixelValue(bitsStored, isSigned);
if (bitsAllocated == 16)
{
var cursor = frameData.Length*n*2;
for (int i = 0; i < frameData.Length; i++)
{
var value = Math.Max(min, Math.Min(max, (int)(min + (max - min) * frameData[i])));
value = value << (highBit - bitsStored + 1);
if (ByteBuffer.LocalMachineEndian == Endian.Little)
{
pixelData[cursor++] = (byte) (value & 0x00FF);
pixelData[cursor++] = (byte) ((value >> 8) & 0x00FF);
}
else
{
pixelData[cursor++] = (byte) ((value >> 8) & 0x00FF);
pixelData[cursor++] = (byte) (value & 0x00FF);
}
}
}
else if (bitsAllocated == 8)
{
var cursor = frameData.Length*n;
for (int i = 0; i < frameData.Length; i++)
{
var value = Math.Max(min, Math.Min(max, (int)(min + (max - min) * frameData[i])));
value = value << (highBit - bitsStored + 1);
pixelData[cursor++] = (byte) (value & 0x00FF);
}
}
}
//just in case, we'll clean the pixel data up. This also (cheaply) removes the
//higher order 1s that shouldn't be there for the signed case.
DicomUncompressedPixelData.ZeroUnusedBits(pixelData, bitsAllocated, bitsStored, highBit);
return pixelData;
}
