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#
OtLayoutError

pub suberror OtLayoutError {
  UnexpectedEof
  InvalidFormat
} derive(Eq, Show, ToJson)

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FeatureList

source

pub struct FeatureList {
  records : Array[FeatureRecord]
} derive(Eq, Show, ToJson)

Feature list table.

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FeatureList::records

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fn FeatureList::records(self : FeatureList) -> ArrayView[FeatureRecord]

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FeatureRecord

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pub struct FeatureRecord {
  tag : @moonbit-community/harfbuzz/common.Tag
Tag
  offset : Int
} derive(Eq, Show, ToJson)

Feature record entry (offset from table start).

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GdefHeader

source

pub struct GdefHeader {
  version : UInt
  glyph_class_def_offset : Int?
  attach_list_offset : Int?
  lig_caret_list_offset : Int?
  mark_attach_class_def_offset : Int?
  mark_glyph_sets_def_offset : Int?
} derive(Show, ToJson)

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GdefTable

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pub struct GdefTable {
  data : BytesView
  header : GdefHeader
} derive(Show, ToJson)

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GdefTable::glyph_class

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fn GdefTable::glyph_class(self : GdefTable, glyph : UInt) -> Result[Int, OtLayoutError]

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GdefTable::header

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fn GdefTable::header(self : GdefTable) -> GdefHeader

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GdefTable::mark_attach_class

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fn GdefTable::mark_attach_class(self : GdefTable, glyph : UInt) -> Result[Int, OtLayoutError]

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GdefTable::mark_glyph_set_contains

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fn GdefTable::mark_glyph_set_contains(self : GdefTable, set_index : Int, glyph : UInt) -> Result[Bool, OtLayoutError]

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GdefTable::parse

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fn GdefTable::parse(blob : @moonbit-community/harfbuzz/blob.Blob
Blob) -> Result[GdefTable, OtLayoutError]

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GposTable

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pub struct GposTable {
  layout : LayoutTable
} derive(Show, ToJson)

GPOS table wrapper.

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GposTable::layout

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fn GposTable::layout(self : GposTable) -> LayoutTable

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GposTable::pair_adjust_deltas

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fn GposTable::pair_adjust_deltas(self : GposTable, glyphs : ArrayView[UInt]) -> Result[Array[ValueRecord], OtLayoutError]

Compute pair adjustment deltas for a glyph sequence.

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GposTable::pair_adjust_deltas_with_lookups

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fn GposTable::pair_adjust_deltas_with_lookups(self : GposTable, glyphs : ArrayView[UInt], lookup_offsets : ArrayView[Int], gdef? : GdefTable) -> Result[Array[ValueRecord], OtLayoutError]

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GposTable::parse

source

fn GposTable::parse(blob : @moonbit-community/harfbuzz/blob.Blob
Blob) -> Result[GposTable, OtLayoutError]

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GposTable::position_deltas

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fn GposTable::position_deltas(self : GposTable, glyphs : ArrayView[UInt]) -> Result[Array[ValueRecord], OtLayoutError]

Compute GPOS positioning deltas for a glyph sequence.

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GposTable::position_deltas_with_lookups

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fn GposTable::position_deltas_with_lookups(self : GposTable, glyphs : ArrayView[UInt], lookup_offsets : ArrayView[Int], gdef? : GdefTable, clusters? : ArrayView[Int], advances_x? : ArrayView[Int], advances_y? : ArrayView[Int]) -> Result[Array[ValueRecord], OtLayoutError]

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GsubTable

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pub struct GsubTable {
  layout : LayoutTable
} derive(Show, ToJson)

GSUB table wrapper.

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GsubTable::apply_single

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fn GsubTable::apply_single(self : GsubTable, glyphs : Array[UInt]) -> Result[Bool, OtLayoutError]

Apply GSUB single substitution lookups to glyph array.

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GsubTable::apply_single_with_lookups

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fn GsubTable::apply_single_with_lookups(self : GsubTable, glyphs : Array[UInt], lookup_offsets : ArrayView[Int], masks? : Array[UInt], lookup_mask? : UInt) -> Result[Bool, OtLayoutError]

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GsubTable::apply_with_lookups

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fn GsubTable::apply_with_lookups(self : GsubTable, glyphs : Array[UInt], clusters : Array[Int], lookup_offsets : ArrayView[Int], gdef? : GdefTable, masks? : Array[UInt], lookup_mask? : UInt) -> Result[(Array[UInt], Array[Int], Bool), OtLayoutError]

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GsubTable::apply_with_lookups_and_masks

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fn GsubTable::apply_with_lookups_and_masks(self : GsubTable, glyphs : Array[UInt], clusters : Array[Int], lookup_offsets : ArrayView[Int], gdef? : GdefTable, masks? : Array[UInt], lookup_mask? : UInt, alt_values? : Array[Int]) -> Result[(Array[UInt], Array[Int], Array[UInt], Bool), OtLayoutError]

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GsubTable::layout

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fn GsubTable::layout(self : GsubTable) -> LayoutTable

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GsubTable::parse

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fn GsubTable::parse(blob : @moonbit-community/harfbuzz/blob.Blob
Blob) -> Result[GsubTable, OtLayoutError]

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LayoutHeader

source

pub struct LayoutHeader {
  version : UInt
  script_list_offset : Int
  feature_list_offset : Int
  lookup_list_offset : Int
  feature_variations_offset : Int?
} derive(Eq, Show, ToJson)

Layout table header (GSUB/GPOS shared).

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LayoutTable

source

pub struct LayoutTable {
  data : BytesView
  header : LayoutHeader
  script_list : ScriptList
  feature_list : FeatureList
  lookup_list : LookupList
} derive(Show, ToJson)

Parsed layout table (GSUB/GPOS shared).

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LayoutTable::feature_list

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fn LayoutTable::feature_list(self : LayoutTable) -> FeatureList

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LayoutTable::header

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fn LayoutTable::header(self : LayoutTable) -> LayoutHeader

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LayoutTable::lookup_list

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fn LayoutTable::lookup_list(self : LayoutTable) -> LookupList

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LayoutTable::parse

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fn LayoutTable::parse(blob : @moonbit-community/harfbuzz/blob.Blob
Blob) -> Result[LayoutTable, OtLayoutError]

Parse a GSUB/GPOS layout table.

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LayoutTable::script_list

source

fn LayoutTable::script_list(self : LayoutTable) -> ScriptList

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LayoutTable::select_lookup_offsets

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fn LayoutTable::select_lookup_offsets(self : LayoutTable, script_tag : @moonbit-community/harfbuzz/common.Tag
Tag, language_tag? : @moonbit-community/harfbuzz/common.Tag
Tag) -> Result[Array[Int], OtLayoutError]

Select lookup offsets for a script/language pair using the default LangSys.

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LayoutTable::select_lookup_offsets_for_feature

source

fn LayoutTable::select_lookup_offsets_for_feature(self : LayoutTable, script_tag : @moonbit-community/harfbuzz/common.Tag
Tag, feature_tag : @moonbit-community/harfbuzz/common.Tag
Tag, language_tag? : @moonbit-community/harfbuzz/common.Tag
Tag, include_required? : Bool) -> Result[Array[Int], OtLayoutError]

Select lookup offsets for a single feature tag within a script/language pair.

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LayoutTable::select_lookup_offsets_with_features

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fn LayoutTable::select_lookup_offsets_with_features(self : LayoutTable, script_tag : @moonbit-community/harfbuzz/common.Tag
Tag, language_tag? : @moonbit-community/harfbuzz/common.Tag
Tag, feature_tags? : Array[@moonbit-community/harfbuzz/common.Tag
Tag]) -> Result[Array[Int], OtLayoutError]

Select lookup offsets for a script/language pair using a feature allowlist.

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LookupList

source

pub struct LookupList {
  offsets : Array[Int]
} derive(Eq, Show, ToJson)

Lookup list table (offsets from table start).

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LookupList::offsets

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fn LookupList::offsets(self : LookupList) -> ArrayView[Int]

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PairAdjust

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pub struct PairAdjust {
  first : ValueRecord
  second : ValueRecord
} derive(Eq, Show, ToJson)

Pair adjustment result.

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ScriptList

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pub struct ScriptList {
  records : Array[ScriptRecord]
} derive(Eq, Show, ToJson)

Script list table.

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ScriptList::records

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fn ScriptList::records(self : ScriptList) -> ArrayView[ScriptRecord]

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ScriptRecord

source

pub struct ScriptRecord {
  tag : @moonbit-community/harfbuzz/common.Tag
Tag
  offset : Int
} derive(Eq, Show, ToJson)

Script record entry (offset from table start).

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ValueRecord

source

pub struct ValueRecord {
  x_placement : Int
  y_placement : Int
  x_advance : Int
  y_advance : Int
} derive(Eq, Show, ToJson)

Value record for GPOS adjustments.

Source Files

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#OtLayoutError

#FeatureList

#FeatureList::records

#FeatureRecord

#GdefHeader

#GdefTable

#GdefTable::glyph_class

#GdefTable::header

#GdefTable::mark_attach_class

#GdefTable::mark_glyph_set_contains

#GdefTable::parse

#GposTable

#GposTable::layout

#GposTable::pair_adjust_deltas

#GposTable::pair_adjust_deltas_with_lookups

#GposTable::parse

#GposTable::position_deltas

#GposTable::position_deltas_with_lookups

#GsubTable

#GsubTable::apply_single

#GsubTable::apply_single_with_lookups

#GsubTable::apply_with_lookups

#GsubTable::apply_with_lookups_and_masks

#GsubTable::layout

#GsubTable::parse

#LayoutHeader

#LayoutTable

#LayoutTable::feature_list

#LayoutTable::header

#LayoutTable::lookup_list

#LayoutTable::parse

#LayoutTable::script_list

#LayoutTable::select_lookup_offsets

#LayoutTable::select_lookup_offsets_for_feature

#LayoutTable::select_lookup_offsets_with_features

#LookupList

#LookupList::offsets

#PairAdjust

#ScriptList

#ScriptList::records

#ScriptRecord

#ValueRecord

Source Files

#
OtLayoutError

#
FeatureList

#
FeatureList::records

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FeatureRecord

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GdefHeader

#
GdefTable

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GdefTable::glyph_class

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GdefTable::header

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GdefTable::mark_attach_class

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GdefTable::mark_glyph_set_contains

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GdefTable::parse

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GposTable

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GposTable::layout

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GposTable::pair_adjust_deltas

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GposTable::pair_adjust_deltas_with_lookups

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GposTable::parse

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GposTable::position_deltas

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GposTable::position_deltas_with_lookups

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GsubTable

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GsubTable::apply_single

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GsubTable::apply_single_with_lookups

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GsubTable::apply_with_lookups

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GsubTable::apply_with_lookups_and_masks

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GsubTable::layout

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GsubTable::parse

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LayoutHeader

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LayoutTable

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LayoutTable::feature_list

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LayoutTable::header

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LayoutTable::lookup_list

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LayoutTable::parse

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LayoutTable::script_list

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LayoutTable::select_lookup_offsets

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LayoutTable::select_lookup_offsets_for_feature

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LayoutTable::select_lookup_offsets_with_features

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LookupList

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LookupList::offsets

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PairAdjust

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ScriptList

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ScriptList::records

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ScriptRecord

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ValueRecord