static func brightness(Double) -> GraphicsContext .FilterReturns a filter that applies a brightness adjustment.
Return Value 戻り値
A filter that applies a contrast adjustment.
Type Method
型メソッド
contrast(_:)
Returns a filter that applies a contrast 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 contrast(_ amount: Double) -> GraphicsContext .FilterParameters パラメータ
amountAn amount to adjust the contrast. A value of zero leaves the result completely gray. A value of one leaves the result unchanged. You can use values greater than one.
Discussion 議論
This filter is equivalent to the contrast filter primitive defined by the Scalable Vector Graphics (SVG) specification.