/// <summary>
/// Remove all unneeded groups with clipping set that doesn't clip anything
/// In sum this is a very, very expensive operation. But it helps to
/// create cleaner and faster code without unnecessary clipping
/// </summary>
private static Geometry RemoveClipping(GraphicVisual visual)
{
Geometry geometry = null;
switch (visual)
{
case GraphicGroup group:
{
var childrenGeometry = new PathGeometry();
geometry = childrenGeometry;
foreach (var childVisual in group.Children)
{
var childgeometry = RemoveClipping(childVisual);
childrenGeometry.AddGeometry(childgeometry);
}
if (group.Clip != null)
{
var groupClipGeometry = GeometryBinaryGenerator.GenerateGeometry(group.Clip);
var intersection = groupClipGeometry.FillContainsWithDetail(childrenGeometry, 0.0001, ToleranceType.Absolute);
if (intersection == IntersectionDetail.FullyContains)
{
group.Clip = null;
}
else
if (intersection == IntersectionDetail.Intersects)
{
var pen1 = new Pen(Brushes.Black, 2);
groupClipGeometry = groupClipGeometry.GetWidenedPathGeometry(pen1);
groupClipGeometry = groupClipGeometry.GetOutlinedPathGeometry();
var pen2 = new Pen(Brushes.Black, 1);
childrenGeometry = childrenGeometry.GetWidenedPathGeometry(pen2);
childrenGeometry = childrenGeometry.GetOutlinedPathGeometry();
intersection = groupClipGeometry.FillContainsWithDetail(childrenGeometry, 0.0001, ToleranceType.Absolute);
if (intersection == IntersectionDetail.FullyContains)
{
group.Clip = null;
}
}
}
break;
}
case GraphicPath graphicPath:
{
geometry = GeometryBinaryGenerator.GenerateGeometry(graphicPath.Geometry);
break;
}
}
return(geometry);
}
/// <summary>
/// Create a GeometryDrawing from a single graphic path
/// </summary>
private static Drawing GeneratePath(GraphicPath graphicPath)
{
var geometryDrawing = new GeometryDrawing();
geometryDrawing.Geometry = GeometryBinaryGenerator.GenerateGeometry(graphicPath.Geometry);
SetColors(graphicPath, geometryDrawing);
return(geometryDrawing);
}
/// <summary>
/// Generates a WPF drawing from the specified geometry tree.
/// </summary>
private static Drawing GenerateDrawing(GraphicVisual visual)
{
Drawing drawing = null;
switch (visual)
{
case GraphicGroup group:
{
var drawingGroup = new DrawingGroup();
drawing = drawingGroup;
drawingGroup.Opacity = group.Opacity;
if (group.Clip != null)
{
drawingGroup.ClipGeometry = GeometryBinaryGenerator.GenerateGeometry(group.Clip);
}
foreach (var childVisual in group.Children)
{
var childDrawing = GenerateDrawing(childVisual);
drawingGroup.Children.Add(childDrawing);
}
break;
}
case GraphicPath graphicPath:
{
drawing = GeneratePath(graphicPath);
break;
}
}
return(drawing);
}