private void DrawImageBox(DcmImageBox imageBox, Graphics graphics, Point position, int width, int height, int dpiX, int dpiY)
{
DcmDataset dataset = imageBox.ImageSequence;
if (!dataset.Contains(DicomTags.PixelData))
{
return;
}
DcmPixelData pixelData = new DcmPixelData(dataset);
PinnedIntArray pixelBuffer = null;
Bitmap bitmap = null;
if (pixelData.SamplesPerPixel == 3)
{
pixelBuffer = new PinnedIntArray(pixelData.GetFrameDataS32(0));
bitmap = new Bitmap(pixelData.ImageWidth, pixelData.ImageHeight,
pixelData.ImageWidth * sizeof(int), PixelFormat.Format32bppRgb, pixelBuffer.Pointer);
}
else
{
bool invert = (pixelData.PhotometricInterpretation == "MONOCHROME1");
if (imageBox.Polarity == "REVERSE")
{
invert = !invert;
}
byte[] pixelsOut = null;
if (pixelData.BitsAllocated == 8)
{
pixelsOut = pixelData.GetFrameDataU8(0);
}
else
{
ushort[] pixels = pixelData.GetFrameDataU16(0);
pixelsOut = new byte[pixels.Length];
double scale = 256.0 / 4096.0;
int pixel = 0;
for (int y = 0; y < pixelData.ImageHeight; y++)
{
for (int x = 0; x < pixelData.ImageWidth; x++)
{
pixelsOut[pixel] = (byte)(pixels[pixel] * scale);
pixel++;
}
}
pixels = null;
}
bitmap = new Bitmap(pixelData.ImageWidth, pixelData.ImageHeight, PixelFormat.Format8bppIndexed);
if (invert)
{
ColorTable.Apply(bitmap, ColorTable.Monochrome1);
}
else
{
ColorTable.Apply(bitmap, ColorTable.Monochrome2);
}
BitmapData bmData = bitmap.LockBits(new Rectangle(0, 0, pixelData.ImageWidth, pixelData.ImageHeight),
ImageLockMode.ReadWrite, PixelFormat.Format8bppIndexed);
IntPtr pos = bmData.Scan0;
for (int i = 0, c = pixelsOut.Length; i < c; i += bmData.Width)
{
Marshal.Copy(pixelsOut, i, pos, bmData.Width);
pos = new IntPtr(pos.ToInt64() + bmData.Stride);
}
bitmap.UnlockBits(bmData);
}
//bitmap.SetResolution(dpiX, dpiY);
int border = 3;
double factor = Math.Min((double)height / (double)bitmap.Height,
(double)width / (double)bitmap.Width);
int drawWidth = (int)(bitmap.Width * factor) - (border * 2);
int drawHeight = (int)(bitmap.Height * factor) - (border * 2);
int drawX = position.X + ((width - drawWidth) / 2);
int drawY = position.Y + ((height - drawHeight) / 2);
graphics.DrawImage(bitmap, drawX, drawY, drawWidth, drawHeight);
}