Type Method 型メソッド

grayscale(_:)

Returns a filter that applies a grayscale adjustment.

Declaration 宣言 

static func grayscale(_ amount: Double) -> GraphicsContext.Filter

Return Value 戻り値

A filter that applies a grayscale adjustment.

Parameters パラメータ

amount

An amount that controls the effect. A value of one makes the image completely gray. A value of zero leaves the result unchanged. Other values apply a linear multiplier effect.

Discussion 議論

This filter is equivalent to the grayscale filter primitive defined by the Scalable Vector Graphics (SVG) specification.

See Also 参照

Manipulating Color

static func saturation(Double) -> GraphicsContext.Filter
Returns a filter that applies a saturation adjustment.
static func colorInvert(Double) -> GraphicsContext.Filter
Returns a filter that inverts the color of their results.
static func colorMultiply(Color) -> GraphicsContext.Filter
Returns a filter that multiplies each color component by the matching component of a given color.
static func hueRotation(Angle) -> GraphicsContext.Filter
Returns a filter that applies a hue rotation adjustment.
static func colorMatrix(ColorMatrix) -> GraphicsContext.Filter
Returns a filter that multiplies by a given color matrix.