/// <summary>
/// Draws a spline primitive to the specified destination buffer.
/// </summary>
/// <param name="buffer">The destination buffer.</param>
/// <param name="pen">A GDI pen to use for drawing.</param>
/// <param name="spline">The spline primitive to be drawn.</param>
/// <param name="dpi">The intended output DPI.</param>
public static void DrawSplinePrimitive(IGdiBuffer buffer, Pen pen, SplinePrimitive spline, float dpi = _nominalScreenDpi)
{
buffer.Graphics.Transform = spline.SpatialTransform.CumulativeTransform;
spline.CoordinateSystem = CoordinateSystem.Source;
buffer.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
try
{
// Draw drop shadow
pen.Color = Color.Black;
pen.Width = CalculateScaledPenWidth(spline, 1, dpi);
SetDashStyle(pen, spline);
var dropShadowOffset = GetDropShadowOffset(spline, dpi);
var pathPoints = GetCurvePoints(spline.Points, dropShadowOffset);
if (spline.Points.IsClosed)
buffer.Graphics.DrawClosedCurve(pen, pathPoints);
else
buffer.Graphics.DrawCurve(pen, pathPoints);
// Draw line
pen.Color = spline.Color;
pathPoints = GetCurvePoints(spline.Points, SizeF.Empty);
if (spline.Points.IsClosed)
buffer.Graphics.DrawClosedCurve(pen, pathPoints);
else
buffer.Graphics.DrawCurve(pen, pathPoints);
}
finally
{
buffer.Graphics.SmoothingMode = SmoothingMode.None;
spline.ResetCoordinateSystem();
buffer.Graphics.ResetTransform();
}
}
/// <summary>
/// Draws a <see cref="SplinePrimitive"/>.
/// </summary>
protected override void DrawSplinePrimitive(SplinePrimitive spline)
{
DrawSplinePrimitive(Surface.FinalBuffer, _pen, spline, Dpi);
}
/// <summary> /// Draws a <see cref="SplinePrimitive"/>. Must be overridden and implemented. /// </summary> protected abstract void DrawSplinePrimitive(SplinePrimitive spline);
/// <summary>
/// Cloning constructor.
/// </summary>
protected SplinePrimitive(SplinePrimitive source, ICloningContext context)
{
context.CloneFields(source, this);
_points = new PointsList(source._points, this);
}
/// <summary>
/// Cloning constructor.
/// </summary>
protected SplinePrimitive(SplinePrimitive source, ICloningContext context)
{
context.CloneFields(source, this);
_points = new PointsList(source._points, this);
}