RGBA

open class RGBA : RGBAProtocol

The RGBA type acts as an owner of an underlying GdkRGBA instance. It provides the methods that can operate on this data type through RGBAProtocol conformance. Use RGBA as a strong reference or owner of a GdkRGBA instance.

A GdkRGBA is used to represent a color, in a way that is compatible with cairo’s notion of color.

GdkRGBA is a convenient way to pass colors around. It’s based on cairo’s way to deal with colors and mirrors its behavior. All values are in the range from 0.0 to 1.0 inclusive. So the color (0.0, 0.0, 0.0, 0.0) represents transparent black and (1.0, 1.0, 1.0, 1.0) is opaque white. Other values will be clamped to this range when drawing.

Show on GitHub
  • ptr 
    Untyped pointer to the underlying `GdkRGBA` instance.

    For type-safe access, use the generated, typed pointer rgba_ptr property instead.

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
    Show on GitHub

  • Designated initialiser from the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the RGBA instance.

    Declaration

    Swift

    @inlinable
public init(_ op: UnsafeMutablePointer<GdkRGBA>)

    Parameters

    op

    pointer to the underlying object
    Show on GitHub

  • Designated initialiser from a constant pointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the RGBA instance.

    Declaration

    Swift

    @inlinable
public init(_ op: UnsafePointer<GdkRGBA>)

    Parameters

    op

    pointer to the underlying object
    Show on GitHub

  • Optional initialiser from a non-mutating gpointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the RGBA instance.

    Declaration

    Swift

    @inlinable
public init!(gpointer op: gpointer?)

    Parameters

    op

    gpointer to the underlying object
    Show on GitHub

  • Optional initialiser from a non-mutating gconstpointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the RGBA instance.

    Declaration

    Swift

    @inlinable
public init!(gconstpointer op: gconstpointer?)

    Parameters

    op

    pointer to the underlying object
    Show on GitHub

  • Optional initialiser from a constant pointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the RGBA instance.

    Declaration

    Swift

    @inlinable
public init!(_ op: UnsafePointer<GdkRGBA>?)

    Parameters

    op

    pointer to the underlying object
    Show on GitHub

  • Optional initialiser from the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the RGBA instance.

    Declaration

    Swift

    @inlinable
public init!(_ op: UnsafeMutablePointer<GdkRGBA>?)

    Parameters

    op

    pointer to the underlying object
    Show on GitHub

  • Designated initialiser from the underlying C data type. GdkRGBA does not allow reference counting, so despite the name no actual retaining will occur. i.e., ownership is transferred to the RGBA instance.

    Declaration

    Swift

    @inlinable
public init(retaining op: UnsafeMutablePointer<GdkRGBA>)

    Parameters

    op

    pointer to the underlying object
    Show on GitHub

  • Reference intialiser for a related type that implements RGBAProtocol GdkRGBA does not allow reference counting.

    Declaration

    Swift

    @inlinable
public init<T>(_ other: T) where T : RGBAProtocol

    Parameters

    other

    an instance of a related type that implements RGBAProtocol
    Show on GitHub

  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public init<T>(cPointer p: UnsafeMutablePointer<T>)

    Parameters

    cPointer

    pointer to the underlying object
    Show on GitHub

  • Unsafe typed, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public init<T>(retainingCPointer cPointer: UnsafeMutablePointer<T>)

    Parameters

    cPointer

    pointer to the underlying object
    Show on GitHub

  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public init(raw p: UnsafeRawPointer)

    Parameters

    p

    raw pointer to the underlying object
    Show on GitHub

  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public init(retainingRaw raw: UnsafeRawPointer)
    Show on GitHub

  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public required init(raw p: UnsafeMutableRawPointer)

    Parameters

    p

    mutable raw pointer to the underlying object
    Show on GitHub

  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public init(retainingRaw raw: UnsafeMutableRawPointer)

    Parameters

    raw

    mutable raw pointer to the underlying object
    Show on GitHub

  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public init(opaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
    Show on GitHub

  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to RGBAProtocol.

    Declaration

    Swift

    @inlinable
public init(retainingOpaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
    Show on GitHub