THotPDF Script Shaping Preprocess Methods

THotPDF API reference

Documents the current script-level preprocess and RTL cursive helpers for N'Ko, Adlam, Hanifi Rohingya, Thai/Lao, Hebrew, Javanese, Tai Viet, Meetei Mayek, Khmer, and Myanmar text

Delphi syntax

property AutoShapeNko: Boolean read FAutoShapeNko write FAutoShapeNko;

property AutoShapeAdlam: Boolean read FAutoShapeAdlam write FAutoShapeAdlam;

property AutoShapeHanifiRohingya: Boolean read FAutoShapeHanifiRohingya write FAutoShapeHanifiRohingya;

function ApplyNkoGSUBPositional(const S: UnicodeString): UnicodeString;

function ApplyAdlamGSUBPositional(const S: UnicodeString): UnicodeString;

function ApplyHanifiRohingyaGSUBPositional(const S: UnicodeString): UnicodeString;

function ApplyThaiLaoReorder(const S: UnicodeString): UnicodeString;

function ApplyHebrewReorder(const S: UnicodeString): UnicodeString;

function ApplyJavaneseReorder(const S: UnicodeString): UnicodeString;

function GetMeeteiMayekCategory(CP: Cardinal): Integer;

function ApplyMeeteiMayekReorder(const Wide: UnicodeString): UnicodeString;

function ApplyTaiVietReorder(const S: UnicodeString): UnicodeString;

Covered APIs

API	Usage notes
`AutoShapeNko`	Enables N'Ko producer-side GSUB cursive shaping
`AutoShapeAdlam`	Enables Adlam producer-side GSUB cursive shaping
`AutoShapeHanifiRohingya`	Enables Hanifi Rohingya producer-side GSUB cursive shaping
`ApplyNkoGSUBPositional`	Applies N'Ko joining-position analysis and font positional GSUB features
`ApplyAdlamGSUBPositional`	Applies Adlam SMP joining-position analysis and font positional GSUB features
`ApplyHanifiRohingyaGSUBPositional`	Applies Hanifi Rohingya joining-position analysis and font positional GSUB features
`ApplyThaiLaoReorder`	Applies Thai/Lao SARA AM decomposition and mark ordering
`ApplyHebrewReorder`	Applies Hebrew mark ordering before RTL output and GPOS mark placement
`ApplyJavaneseReorder`	Applies Javanese pre-base vowel reorder
`GetMeeteiMayekCategory`	Returns the Meetei Mayek shaping category
`ApplyMeeteiMayekReorder`	Applies Meetei Mayek syllable reorder
`ApplyTaiVietReorder`	Applies Tai Viet vowel and mark ordering
`sfThaiLaoReorder`	Enables Thai/Lao preprocessing
`sfHebrewReorder`	Enables Hebrew preprocessing
`sfJavaneseShaping`	Enables Javanese preprocessing
`sfTaiVietReorder`	Enables Tai Viet preprocessing
`sfMeeteiMayekShaping`	Enables Meetei Mayek preprocessing
`sfKhmerShaping`	Enables Khmer preprocessing
`sfMyanmarShaping`	Enables Myanmar preprocessing

Usage notes

AutoShapeNko, AutoShapeAdlam, and AutoShapeHanifiRohingya connect RTL cursive GSUB positional paths to text output. The other flags normalise script-specific marks and clusters before cmap-to-GID mapping