Module font_features 

OpenType features a piece of text asks its font for, such as tabular figures.

A feature does not change which font the text is set in. It picks one of the forms the font already has: digits of one width, a ligature left apart, a stylistic set. That is why text with a type role may take features too, where it may not name a font.

The list travels in the FontFeatureSettings property as fixed 8-byte records, the four tag bytes and then the value as a little-endian u32. The Renderer turns it into Compose’s fontFeatureSettings string once, when the property changes.

Structs

FontFeature

One OpenType feature and its value. Compose’s TextStyle.fontFeatureSettings entry, CSS’s font-feature-settings entry.

Constants

FONT_FEATURE_LEN

Bytes of one feature record: the tag, then the value.

FONT_FEATURE_TAG_AT

Where each part of a record starts.

FONT_FEATURE_VALUE_AT

MAX_FONT_FEATURES

The most features one node may carry. The Renderer reports a longer list as a protocol error and draws the text without any of them.

Functions

font_feature_bytes

The records of features, in order, as the FontFeatureSettings property carries them.