DrawingOptionsFastThinLines Property

public bool FastThinLines { get; set; }

Public Property FastThinLines As Boolean
	Get
	Set

public:
property bool FastThinLines {
	bool get ();
	void set (bool value);
}

member FastThinLines : bool with get, set

Property Value

When FastThinLines is , thin lines (that is, when Pen.Width is less or equal to 1) and arcs are drawn with a Bresenham-like algorithm, which is both faster and produces better results than the default algorithm.

This property has no effect when AntiAliasing is .

The following images provide a few examples:

Description	Image Example
Drawing a Path with AntiAliasing = , FastThinLines = . This is the default configuration of these properties.
Drawing a Path with AntiAliasing = , FastThinLines = , DrawPathPixelOffset = Half. Note that the lines are more jagged than above.
Drawing a Path with AntiAliasing = , DrawPathPixelOffset = Half. The lines are much smoother.
Drawing an ellipse with AntiAliasing = , FastThinLines = . The image is zoomed in for better visibility.
Drawing an ellipse with AntiAliasing = , FastThinLines = , DrawPathPixelOffset = Half. The image is zoomed in for better visibility.

Though enabling FastThinLines usually produces better results, sometimes it still may be beneficial to disable it. For example, when filling and drawing the same Path without anti-aliasing, in some cases the 1-pixel width outline may not be perfectly aligned with the fill area, unless FastThinLines is disabled:

Description	Image Example
Filling and drawing the same polygon with AntiAliasing = , FastThinLines = . You can observe alignment issues.
Filling and drawing the same polygon with AntiAliasing = , FastThinLines = . Now there is no alignment issue

Reference