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 FEATURE_GLOBAL_START and end to HB_FEATURE_GLOBAL_END 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

ManagedPtrNewtype FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

toManagedPtr :: FeatureT -> ManagedPtr FeatureT

TypedObject FeatureT

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

glibType :: IO GType

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

IsGValue (Maybe FeatureT)

Convert FeatureT to and from GValue. See toGValue and fromGValue.

Defined in GI.HarfBuzz.Structs.FeatureT

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe FeatureT -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe 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

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

The hb_tag_t tag of the feature

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

The value of the feature. 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 ]