Struct VariationStoreBuilder 

pub struct VariationStoreBuilder { /* private fields */ }

A builder for the ItemVariationStore.

This handles assigning VariationIndex values to unique sets of deltas and grouping delta sets into ItemVariationData subtables.

Implementations

impl VariationStoreBuilder

pub fn new(axis_count: u16) -> Self

Create a builder that will optimize delta storage.

This is the general case. For HVAR, it is also possible to use the glyph ids as implicit indices, which may be more efficient for some data. To use implicit indices, use new_with_implicit_indices instead.

pub fn is_empty(&self) -> bool

Returns true if no deltas have been added to this builder

pub fn new_with_implicit_indices(axis_count: u16) -> Self

Create a builder that does not share deltas between entries.

This is used in HVAR, where it is possible to use glyph ids as the ‘inner index’, and to generate a single ItemVariationData subtable with one entry per item.

pub fn add_deltas<T: Into<i32>>( &mut self, deltas: Vec<(VariationRegion, T)>, ) -> u32

pub fn build(self) -> (ItemVariationStore, VariationIndexRemapping)

Build the ItemVariationStore table

This also returns a structure that can be used to remap the temporarily assigned delta set Ids to their final VariationIndex values.

Trait Implementations

impl Clone for VariationStoreBuilder

fn clone(&self) -> VariationStoreBuilder

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VariationStoreBuilder

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

Formats the value using the given formatter.