FontMetrics

open class FontMetrics : FontMetricsProtocol

A PangoFontMetrics structure holds the overall metric information for a font.

The information in a PangoFontMetrics structure may be restricted to a script. The fields of this structure are private to implementations of a font backend. See the documentation of the corresponding getters for documentation of their meaning.

For an overview of the most important metrics, see:

<picture> <source srcset=“fontmetrics-dark.png” media=“(prefers-color-scheme: dark)”> <img alt=“Font metrics” src=“fontmetrics-light.png”> </picture>

The FontMetrics type acts as a reference-counted owner of an underlying PangoFontMetrics instance. It provides the methods that can operate on this data type through FontMetricsProtocol conformance. Use FontMetrics as a strong reference or owner of a PangoFontMetrics instance.

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  • ptr 
    Untyped pointer to the underlying `PangoFontMetrics` instance.

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

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
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  • Designated initialiser from the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the FontMetrics instance.

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
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  • 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 FontMetrics instance.

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
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  • 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 FontMetrics instance.

    Declaration

    Swift

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

    Parameters

    op

    gpointer to the underlying object
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  • 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 FontMetrics instance.

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
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  • 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 FontMetrics instance.

    Declaration

    Swift

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

    Parameters

    op

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

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
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  • Designated initialiser from the underlying C data type. Will retain PangoFontMetrics. i.e., ownership is transferred to the FontMetrics instance.

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
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  • Reference intialiser for a related type that implements FontMetricsProtocol Will retain PangoFontMetrics.

    Declaration

    Swift

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

    Parameters

    other

    an instance of a related type that implements FontMetricsProtocol
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to FontMetricsProtocol.

    Declaration

    Swift

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

    Parameters

    cPointer

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

    Declaration

    Swift

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

    Parameters

    cPointer

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

    Declaration

    Swift

    @inlinable
public init(raw p: UnsafeRawPointer)

    Parameters

    p

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

    Declaration

    Swift

    @inlinable
public init(retainingRaw raw: UnsafeRawPointer)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to FontMetricsProtocol.

    Declaration

    Swift

    @inlinable
public required init(raw p: UnsafeMutableRawPointer)

    Parameters

    p

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

    Declaration

    Swift

    @inlinable
public init(retainingRaw raw: UnsafeMutableRawPointer)

    Parameters

    raw

    mutable raw pointer to the underlying object
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to FontMetricsProtocol.

    Declaration

    Swift

    @inlinable
public init(opaquePointer p: OpaquePointer)

    Parameters

    p

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

    Declaration

    Swift

    @inlinable
public init(retainingOpaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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