static IEnumerable <CanvasGeometry> CreateCanvasGeometries(
ShapeContext context,
Stack <ShapeLayerContent> stack,
ShapeFill.PathFillType pathFillType)
{
while (stack.Count > 0)
{
// Ignore context on the stack - we only want geometries.
var shapeContent = stack.Pop();
switch (shapeContent.ContentType)
{
case ShapeContentType.Group:
{
// Convert all the shapes in the group to a list of geometries
var group = (ShapeGroup)shapeContent;
var groupedGeometries = CreateCanvasGeometries(context.Clone(), new Stack <ShapeLayerContent>(group.Contents.ToArray()), pathFillType).ToArray();
foreach (var geometry in groupedGeometries)
{
yield return(geometry);
}
}
break;
case ShapeContentType.MergePaths:
yield return(MergeShapeLayerContent(context, stack, ((MergePaths)shapeContent).Mode));
break;
case ShapeContentType.Repeater:
context.Issues.RepeaterIsNotSupported();
break;
case ShapeContentType.Transform:
// TODO - do we need to clear out the transform when we've finished with this call to CreateCanvasGeometries?? Maybe the caller should clone the context.
context.SetTransform((Transform)shapeContent);
break;
case ShapeContentType.SolidColorStroke:
case ShapeContentType.LinearGradientStroke:
case ShapeContentType.RadialGradientStroke:
case ShapeContentType.SolidColorFill:
case ShapeContentType.RadialGradientFill:
case ShapeContentType.LinearGradientFill:
case ShapeContentType.TrimPath:
case ShapeContentType.RoundCorners:
// Ignore commands that set the context - we only want geometries.
break;
case ShapeContentType.Path:
yield return(Paths.CreateWin2dPathGeometryFromShape(context, (Path)shapeContent, pathFillType, optimizeLines: true));
break;
case ShapeContentType.Ellipse:
yield return(Ellipses.CreateWin2dEllipseGeometry(context, (Ellipse)shapeContent));
break;
case ShapeContentType.Rectangle:
yield return(Rectangles.CreateWin2dRectangleGeometry(context, (Rectangle)shapeContent));
break;
case ShapeContentType.Polystar:
context.Issues.PolystarIsNotSupported();
break;
default:
throw new InvalidOperationException();
}
}
}
public static CanvasFilledRegionDetermination FilledRegionDetermination(ShapeFill.PathFillType fillType)
{
return((fillType == ShapeFill.PathFillType.Winding) ? CanvasFilledRegionDetermination.Winding : CanvasFilledRegionDetermination.Alternate);
}