protected void SerializeDisplayedArea(DisplayedAreaModuleIod displayedAreaModule, DicomPresentationImageCollection <T> images)
{
displayedAreaModule.InitializeAttributes();
List <DisplayedAreaModuleIod.DisplayedAreaSelectionSequenceItem> displayedAreas = new List <DisplayedAreaModuleIod.DisplayedAreaSelectionSequenceItem>();
foreach (T image in images)
{
DisplayedAreaModuleIod.DisplayedAreaSelectionSequenceItem displayedArea = new DisplayedAreaModuleIod.DisplayedAreaSelectionSequenceItem();
displayedArea.InitializeAttributes();
displayedArea.ReferencedImageSequence = new[] { CreateImageSopInstanceReference(image.Frame) };
ImageGraphic imageGraphic = ((IImageGraphicProvider)image).ImageGraphic;
Size imageSize = new Size(imageGraphic.Columns, imageGraphic.Rows);
// compute the visible area of the image as a rectangle oriented positively in screen space
RectangleF visibleImageArea = imageGraphic.SpatialTransform.ConvertToSource(image.ClientRectangle);
visibleImageArea = RectangleUtilities.ConvertToPositiveRectangle(visibleImageArea);
visibleImageArea = RectangleUtilities.RoundInflate(visibleImageArea);
visibleImageArea = RectangleUtilities.Intersect(visibleImageArea, new Rectangle(new Point(0, 0), imageSize));
// compute the pixel addresses of the visible area by intersecting area with actual pixel addresses available
Rectangle visiblePixels = ConvertToPixelAddressRectangle(Rectangle.Truncate(visibleImageArea));
displayedArea.DisplayedAreaTopLeftHandCorner = visiblePixels.Location;
displayedArea.DisplayedAreaBottomRightHandCorner = visiblePixels.Location + visiblePixels.Size;
ISpatialTransform spatialTransform = image.SpatialTransform;
switch (_displayAreaSerializationOption)
{
case DisplayAreaSerializationOption.SerializeAsMagnification:
displayedArea.PresentationSizeMode = DisplayedAreaModuleIod.PresentationSizeMode.Magnify;
displayedArea.PresentationPixelMagnificationRatio = spatialTransform.Scale;
break;
case DisplayAreaSerializationOption.SerializeAsTrueSize:
displayedArea.PresentationSizeMode = DisplayedAreaModuleIod.PresentationSizeMode.TrueSize;
displayedArea.PresentationPixelSpacing = image.Frame.NormalizedPixelSpacing;
break;
case DisplayAreaSerializationOption.SerializeAsDisplayedArea:
default:
displayedArea.PresentationSizeMode = DisplayedAreaModuleIod.PresentationSizeMode.ScaleToFit;
break;
}
displayedArea.PresentationPixelAspectRatio = PixelAspectRatio.FromString(image.Frame.NormalizedPixelSpacing.GetPixelAspectRatioString());
displayedAreas.Add(displayedArea);
}
displayedAreaModule.DisplayedAreaSelectionSequence = displayedAreas.ToArray();
}
protected void DeserializeDisplayedArea(DisplayedAreaModuleIod dispAreaMod, out RectangleF displayedArea, T image)
{
ISpatialTransform spatialTransform = image.SpatialTransform;
foreach (DisplayedAreaModuleIod.DisplayedAreaSelectionSequenceItem item in dispAreaMod.DisplayedAreaSelectionSequence)
{
var dictionary = !DeserializeIgnoreImageRelationship ? new ImageSopInstanceReferenceDictionary(item.ReferencedImageSequence, true) : null;
if (dictionary == null || dictionary.ReferencesFrame(image.Frame.SopInstanceUid, image.Frame.FrameNumber))
{
// get the displayed area of the image in source coordinates (stored values do not have sub-pixel accuracy)
var displayRect = RectangleF.FromLTRB(item.DisplayedAreaTopLeftHandCorner.X,
item.DisplayedAreaTopLeftHandCorner.Y,
item.DisplayedAreaBottomRightHandCorner.X,
item.DisplayedAreaBottomRightHandCorner.Y);
displayRect = RectangleUtilities.ConvertToPositiveRectangle(displayRect);
displayRect.Location = displayRect.Location - new SizeF(1, 1);
displayRect.Size = displayRect.Size + new SizeF(1, 1);
var centerDisplay = true;
switch (item.PresentationSizeMode)
{
case DisplayedAreaModuleIod.PresentationSizeMode.Magnify:
// displays selected area at specified magnification factor
spatialTransform.Scale = (float)item.PresentationPixelMagnificationRatio.GetValueOrDefault(1);
break;
case DisplayedAreaModuleIod.PresentationSizeMode.TrueSize:
// currently no support for determining true size, so default to scale area to fit
case DisplayedAreaModuleIod.PresentationSizeMode.ScaleToFit:
case DisplayedAreaModuleIod.PresentationSizeMode.None:
default:
if (spatialTransform is IImageSpatialTransform && displayRect.Location == new PointF(0, 0) && displayRect.Size == new SizeF(image.ImageGraphic.Columns, image.ImageGraphic.Rows))
{
// if the display rect is the whole image, then take advantage of the built-in scale image to fit functionality
IImageSpatialTransform iist = (IImageSpatialTransform)spatialTransform;
iist.ScaleToFit = true;
centerDisplay = false; // when ScaleToFit is true, the image will automatically be positioned correctly in the client area
}
else
{
var clientArea = image.ClientRectangle.Size;
var displaySize = displayRect.Size;
// if image is rotated 90 or 270, transpose width/height
if (Math.Abs(Math.Round(Math.Sin(spatialTransform.RotationXY * Math.PI / 180))) > 0)
{
displaySize = new SizeF(displaySize.Height, displaySize.Width);
}
// compute the maximum magnification that allows the entire displayRect to be visible
spatialTransform.Scale = Math.Min(clientArea.Width / displaySize.Width, clientArea.Height / displaySize.Height);
}
break;
}
if (centerDisplay)
{
// compute translation so that the displayRect is centered in the clientRect
var displayCentre = GetRectangleCenter(displayRect);
var clientCentre = spatialTransform.ConvertToSource(GetRectangleCenter(image.ClientRectangle));
spatialTransform.TranslationX = clientCentre.X - displayCentre.X;
spatialTransform.TranslationY = clientCentre.Y - displayCentre.Y;
}
displayedArea = displayRect;
return;
}
}
displayedArea = new RectangleF(0, 0, image.ImageGraphic.Columns, image.ImageGraphic.Rows);
}
