/// <summary>
/// Applies a radial glow effect to an image.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="source">The image this method extends.</param>
/// <param name="color">The color to set as the glow.</param>
/// <param name="options">The options effecting things like blending.</param>
/// <returns>The <see cref="Image{TPixel}"/>.</returns>
public static IImageProcessingContext <TPixel> Glow <TPixel>(this IImageProcessingContext <TPixel> source, TPixel color, GraphicsOptions options)
where TPixel : struct, IPixel <TPixel>
=> source.Glow(color, ValueSize.PercentageOfWidth(0.5f), options);
/// <summary>
/// Applies a radial vignette effect to an image.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="source">The image this method extends.</param>
/// <param name="options">The options effecting pixel blending.</param>
/// <returns>The <see cref="Image{TPixel}"/>.</returns>
public static IImageProcessingContext <TPixel> Vignette <TPixel>(this IImageProcessingContext <TPixel> source, GraphicsOptions options)
where TPixel : struct, IPixel <TPixel>
=> source.VignetteInternal(NamedColors <TPixel> .Black, ValueSize.PercentageOfWidth(.5f), ValueSize.PercentageOfHeight(.5f), options);
/// <summary>
/// Applies a radial glow effect to an image.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="source">The image this method extends.</param>
/// <param name="rectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
/// </param>
/// <param name="options">The options effecting things like blending.</param>
/// <returns>The <see cref="Image{TPixel}"/>.</returns>
public static IImageProcessingContext <TPixel> Glow <TPixel>(this IImageProcessingContext <TPixel> source, Rectangle rectangle, GraphicsOptions options)
where TPixel : struct, IPixel <TPixel>
=> source.Glow(NamedColors <TPixel> .Black, ValueSize.PercentageOfWidth(0.5f), rectangle, options);