protected override void AddShapeToGraphicsPath(GraphicsPath graphicsPath, RectangleF shapeData)
{
// we must do the positive rectangle conversion because the GDI GraphicsPath tests will fail on negative rectangles
graphicsPath.AddRectangle(RectangleUtilities.ConvertToPositiveRectangle(shapeData));
}
/// <summary>
/// Called by <see cref="Roi.BoundingBox"/> to compute the tightest bounding box of the region of interest.
/// </summary>
/// <remarks>
/// <para>This method is only called once and the result is cached for future accesses.</para>
/// <para>
/// Regions of interest have no notion of coordinate system. All coordinates are inherently
/// given relative to the image pixel space (i.e. <see cref="CoordinateSystem.Source"/>.)
/// </para>
/// </remarks>
/// <returns>A rectangle defining the bounding box.</returns>
protected override RectangleF ComputeBounds()
{
return(RectangleUtilities.ConvertToPositiveRectangle(_rectangle));
}
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 boundaries of the image as a positive rectangle in screen space
RectangleF visibleBounds = imageGraphic.SpatialTransform.ConvertToDestination(new Rectangle(new Point(0, 0), imageSize));
visibleBounds = RectangleUtilities.Intersect(visibleBounds, image.ClientRectangle);
visibleBounds = RectangleUtilities.ConvertToPositiveRectangle(visibleBounds);
// compute the visible area of the image as a rectangle oriented positively in screen space
RectangleF visibleImageArea = imageGraphic.SpatialTransform.ConvertToSource(visibleBounds);
visibleImageArea = RectangleUtilities.RoundInflate(visibleImageArea);
// compute the pixel addresses of the visible area by intersecting area with actual pixel addresses available
//Rectangle visiblePixels = Rectangle.Truncate(RectangleUtilities.Intersect(visibleImageArea, new RectangleF(_point1, imageSize)));
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.PixelSpacing;
break;
case DisplayAreaSerializationOption.SerializeAsDisplayedArea:
default:
displayedArea.PresentationSizeMode = DisplayedAreaModuleIod.PresentationSizeMode.ScaleToFit;
break;
}
PixelAspectRatio pixelAspectRatio = image.Frame.PixelAspectRatio;
if (pixelAspectRatio == null || pixelAspectRatio.IsNull)
{
pixelAspectRatio = PixelAspectRatio.FromString(image.Frame[DicomTags.PixelAspectRatio].ToString());
}
if (pixelAspectRatio == null || pixelAspectRatio.IsNull)
{
pixelAspectRatio = new PixelAspectRatio(1, 1);
}
displayedArea.PresentationPixelAspectRatio = pixelAspectRatio;
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)
{
if (item.ReferencedImageSequence[0].ReferencedSopInstanceUid == image.ImageSop.SopInstanceUid)
{
// 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);
}
/// <summary>
/// Constructs a new rectangular geometric shutter.
/// </summary>
/// <param name="rectangle">The rectangle defining the shutter boundary.</param>
public RectangularShutter(Rectangle rectangle)
{
this.Rectangle = RectangleUtilities.ConvertToPositiveRectangle(rectangle);
}
