GI.HarfBuzz.Structs.FeatureT

The FeatureT is the structure that holds information about requested feature application. The feature will be applied with the given value to all glyphs which are in clusters between start (inclusive) and end (exclusive). Setting start to hBFEATUREGLOBALSTART and end to hBFEATUREGLOBALEND specifies that the feature always applies to the entire buffer.

Exported types

newtype FeatureT

Memory-managed wrapper type.

Constructors

FeatureT (ManagedPtr FeatureT)

Instances

Eq FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

(==) :: FeatureT -> FeatureT -> Bool

(/=) :: FeatureT -> FeatureT -> Bool

GBoxed FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

TypedObject FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

glibType :: IO GType

ManagedPtrNewtype FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

toManagedPtr :: FeatureT -> ManagedPtr FeatureT

IsGValue FeatureT

Convert FeatureT to and from GValue with toGValue and fromGValue.

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

toGValue :: FeatureT -> IO GValue

fromGValue :: GValue -> IO FeatureT

HasParentTypes FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

tag ~ 'AttrSet => Constructible FeatureT tag

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

new :: MonadIO m => (ManagedPtr FeatureT -> FeatureT) -> [AttrOp FeatureT tag] -> m FeatureT

type ParentTypes FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

type ParentTypes FeatureT = '[] :: [Type]

newZeroFeatureT :: MonadIO m => m FeatureT

Construct a FeatureT struct initialized to zero.

Methods

Overloaded methods

Properties

end

the cluster to end applying this feature setting (exclusive).

getFeatureTEnd :: MonadIO m => FeatureT -> m Word32

Get the value of the “end” field. When overloading is enabled, this is equivalent to

get featureT #end

setFeatureTEnd :: MonadIO m => FeatureT -> Word32 -> m ()

Set the value of the “end” field. When overloading is enabled, this is equivalent to

set featureT [ #end := value ]

start

the cluster to start applying this feature setting (inclusive).

getFeatureTStart :: MonadIO m => FeatureT -> m Word32

Get the value of the “start” field. When overloading is enabled, this is equivalent to

get featureT #start

setFeatureTStart :: MonadIO m => FeatureT -> Word32 -> m ()

Set the value of the “start” field. When overloading is enabled, this is equivalent to

set featureT [ #start := value ]

tag

a feature tag

getFeatureTTag :: MonadIO m => FeatureT -> m Word32

Get the value of the “tag” field. When overloading is enabled, this is equivalent to

get featureT #tag

setFeatureTTag :: MonadIO m => FeatureT -> Word32 -> m ()

Set the value of the “tag” field. When overloading is enabled, this is equivalent to

set featureT [ #tag := value ]

value

0 disables the feature, non-zero (usually 1) enables the feature. For features implemented as lookup type 3 (like 'salt') the value is a one based index into the alternates.

getFeatureTValue :: MonadIO m => FeatureT -> m Word32

Get the value of the “value” field. When overloading is enabled, this is equivalent to

get featureT #value

setFeatureTValue :: MonadIO m => FeatureT -> Word32 -> m ()

Set the value of the “value” field. When overloading is enabled, this is equivalent to

set featureT [ #value := value ]