Struct CTRunDelegateCallbacks 

#[repr(C)]
pub struct CTRunDelegateCallbacks {
    pub version: CFIndex,
    pub dealloc: CTRunDelegateDeallocateCallback,
    pub getAscent: CTRunDelegateGetAscentCallback,
    pub getDescent: CTRunDelegateGetDescentCallback,
    pub getWidth: CTRunDelegateGetWidthCallback,
}

Available on crate feature CTRunDelegate only.

Structure containing the callbacks of a CTRunDelegate.

These callbacks are provided by the owner of a run delegate and are used to modify glyph metrics during layout. The values returned by a delegate are applied to each glyph in the run(s) corresponding to the attribute containing that delegate.

Field: version The version number of the callbacks being passed in as a parameter to CTRunDelegateCreate. This field should always be set to kCTRunDelegateCurrentVersion.

Field: dealloc The callback used when a CTRunDelegate’s retain count reaches 0 and the CTRunDelegate is deallocated. This callback may be NULL.

Field: getAscent The callback used to indicate the ascent of the CTRunDelegate. This callback may be NULL, which is equivalent to a getAscent callback that always returns 0.

Field: getDescent The callback used to indicate the descent of the CTRunDelegate. This callback may be NULL, which is equivalent to a getDescent callback that always returns 0.

Field: getWidth The callback used to indicate the width of the CTRunDelegate. This callback may be NULL, which is equivalent to a getWidth callback that always returns 0.

See also Apple’s documentation

Fields

version: CFIndex

dealloc: CTRunDelegateDeallocateCallback

getAscent: CTRunDelegateGetAscentCallback

getDescent: CTRunDelegateGetDescentCallback

getWidth: CTRunDelegateGetWidthCallback

Trait Implementations

impl Clone for CTRunDelegateCallbacks

fn clone(&self) -> CTRunDelegateCallbacks

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CTRunDelegateCallbacks

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Encode for CTRunDelegateCallbacks

Available on crate feature objc2 only.

const ENCODING: Encoding

The Objective-C type-encoding for this type.

impl PartialEq for CTRunDelegateCallbacks

fn eq(&self, other: &CTRunDelegateCallbacks) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for CTRunDelegateCallbacks

Available on crate feature objc2 only.

const ENCODING_REF: Encoding

The Objective-C type-encoding for a reference of this type.

impl Copy for CTRunDelegateCallbacks

impl StructuralPartialEq for CTRunDelegateCallbacks