static func contrast(Double) -> GraphicsContext .FilterReturns a filter that applies a contrast adjustment.
Return Value 戻り値
A filter that applies a brightness adjustment.
Type Method
型メソッド
brightness(_:)
Returns a filter that applies a brightness adjustment.
Availability 有効性
- iOS 15.0+
- iPadOS 15.0+
- macOS 12.0+
- Mac Catalyst 15.0+
- tvOS 15.0+
- watchOS 8.0+
Technology
- Swift
UI
Declaration 宣言
static func brightness(_ amount: Double) -> GraphicsContext .FilterParameters パラメータ
amountAn amount to add to the pixel’s color components.
Discussion 議論
This filter is different than brightness filter primitive defined by the Scalable Vector Graphics (SVG) specification. You can obtain an effect like that filter using a grayscale(_:) color multiply. However, this filter does match the CIColor filter’s brightness adjustment.