Type Alias harfbuzz_sys::hb_buffer_cluster_level_t

pub type hb_buffer_cluster_level_t = c_uint;

hb_buffer_cluster_level_t: @HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES: Return cluster values grouped by graphemes into monotone order. @HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS: Return cluster values grouped into monotone order. @HB_BUFFER_CLUSTER_LEVEL_CHARACTERS: Don’t group cluster values. @HB_BUFFER_CLUSTER_LEVEL_DEFAULT: Default cluster level, equal to @HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES.

Data type for holding HarfBuzz’s clustering behavior options. The cluster level dictates one aspect of how HarfBuzz will treat non-base characters during shaping.

In @HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES, non-base characters are merged into the cluster of the base character that precedes them.

In @HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS, non-base characters are initially assigned their own cluster values, which are not merged into preceding base clusters. This allows HarfBuzz to perform additional operations like reorder sequences of adjacent marks.

@HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES is the default, because it maintains backward compatibility with older versions of HarfBuzz. New client programs that do not need to maintain such backward compatibility are recommended to use @HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS instead of the default.

Since: 0.9.42