public static IImageProcessingContext <TPixel> PowerAlpha <TPixel>(this IImageProcessingContext <TPixel> source, float amount = 1) where TPixel : struct, IPixel <TPixel>
{
var filter = new Matrix4x4()
{
M11 = 1,
M22 = 1,
M33 = 1,
M44 = amount
};
return(source.Filter(filter));
}
public static IImageProcessingContext <TPixel> Tint <TPixel>(this IImageProcessingContext <TPixel> source, IPixel color, float amount = 1) where TPixel : struct, IPixel <TPixel>
{
var rgb = color.ToVector4() * amount;
var filter = new Matrix4x4()
{
M11 = 1 - amount,
M22 = 1 - amount,
M33 = 1 - amount,
M41 = rgb.X,
M42 = rgb.Y,
M43 = rgb.Z,
M44 = 1
};
return(source.Filter(filter));
}
/// <summary>
/// Applies a tint to an image.
/// </summary>
public static IImageProcessingContext Tint(this IImageProcessingContext context, Color colour)
{
var tintMatrix = CreateTintMatrix(colour);
return(context.Filter(tintMatrix));
}