# GraphicsContext.Filter A type that applies image processing operations to rendered content. ``` struct Filter ``` ## Overview Create and configure a filter that produces an image processing effect, like adding a drop shadow or a blur effect, by calling one of the factory methods defined by the `Filter` structure. Call the [`addFilter(_:options:)`](/documentation/SwiftUI/GraphicsContext/addFilter(_:options:)) method to add the filter to a [`GraphicsContext`](/documentation/SwiftUI/GraphicsContext). The filter only affects content that you draw into the context after adding the filter. ## Topics ### Changing brightness and contrast [`static func brightness(Double) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/brightness(_:)) Returns a filter that applies a brightness adjustment. [`static func contrast(Double) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/contrast(_:)) Returns a filter that applies a contrast adjustment. ### Manipulating color [`static func saturation(Double) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/saturation(_:)) Returns a filter that applies a saturation adjustment. [`static func colorInvert(Double) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/colorInvert(_:)) Returns a filter that inverts the color of their results. [`static func colorMultiply(Color) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/colorMultiply(_:)) Returns a filter that multiplies each color component by the matching component of a given color. [`static func hueRotation(Angle) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/hueRotation(_:)) Returns a filter that applies a hue rotation adjustment. [`static func grayscale(Double) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/grayscale(_:)) Returns a filter that applies a grayscale adjustment. [`static func colorMatrix(ColorMatrix) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/colorMatrix(_:)) Returns a filter that multiplies by a given color matrix. ### Adding blur [`static func blur(radius: CGFloat, options: GraphicsContext.BlurOptions) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/blur(radius:options:)) Returns a filter that applies a Gaussian blur. ### Adding a shadow [`static func shadow(color: Color, radius: CGFloat, x: CGFloat, y: CGFloat, blendMode: GraphicsContext.BlendMode, options: GraphicsContext.ShadowOptions) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/shadow(color:radius:x:y:blendMode:options:)) Returns a filter that adds a shadow. ### Adjusting opacity [`static var luminanceToAlpha: GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/luminanceToAlpha) Returns a filter that sets the opacity of each pixel based on its luminance. [`static func alphaThreshold(min: Double, max: Double, color: Color) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/alphaThreshold(min:max:color:)) Returns a filter that replaces each pixel with alpha components within a range by a constant color, or transparency otherwise. ### Adding a transformation [`static func projectionTransform(ProjectionTransform) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/projectionTransform(_:)) Returns a filter that transforms the rasterized form of subsequent graphics primitives. ### Using a custom Metal shader [`static func colorShader(Shader) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/colorShader(_:)) Returns a filter that applies `shader` to the color of each source pixel. [`static func distortionShader(Shader, maxSampleOffset: CGSize) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/distortionShader(_:maxSampleOffset:)) Returns a filter that applies `shader` as a geometric distortion effect on the location of each pixel. [`static func layerShader(Shader, maxSampleOffset: CGSize) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/layerShader(_:maxSampleOffset:)) Returns a filter that applies `shader` to the contents of the source layer. ### Type Methods [`static func alphaMultiply(Color) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/alphaMultiply(_:)) Returns a filter that multiplies the alpha component by a given color. [`static func colorMatrix(ColorMatrix, isPremultiplied: Bool) -> GraphicsContext.Filter`](/documentation/SwiftUI/GraphicsContext/Filter/colorMatrix(_:isPremultiplied:)) Returns a filter that multiplies by a given color matrix. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)