THotPDF GPOS Kerning and Placement Methods

THotPDF API 参考

本页说明与 GPOS kerning and placement methods 相关的 API 组。类型名、方法名和 Delphi 语法保持不翻译，便于和源码直接对应

function ApplyMarkToLigatureShaping(const Wide: UnicodeString): UnicodeString;

Delphi 语法

function HasGPOSKerning: Boolean;

function GetGPOSPairAdjustment(FirstGID, SecondGID: Word): Integer;

function GetGPOSPairAdjustment(FirstGID, SecondGID: Word; out AXPlacement, AYPlacement, AYAdvance: Integer): Integer;

function GetGPOSContextualKernRun(const GIDs: array of Word): TArray<Integer>;

function HasGPOSVerticalKern: Boolean;

function GetGPOSVerticalKern(FirstGID, SecondGID: Word): Integer;

function GetGPOSMarkOffset(BaseGID, MarkGID: Word; out DX, DY: Integer): Boolean;

function GetGPOSMarkMarkOffset(BaseMarkGID, AttachMarkGID: Word; out DX, DY: Integer): Boolean;

function HasGPOSCursive: Boolean;

function GetGPOSCursiveAnchors(GID: Word; out EntryX, EntryY, ExitX, ExitY: Integer; out HasEntry, HasExit: Boolean): Boolean;

function GetGPOSMarkToLigatureOffset(LigGID: Word; ComponentIndex: Integer; MarkGID: Word; out DX, DY: Integer): Boolean;

涵盖的 API

使用说明

在注册合适的 Unicode 字体之后、输出文本之前使用这些 API。如果字体没有声明所需的 OpenType 表，查询会返回安全的无操作结果，或者输出路径回退到更简单的行为

另请参阅: ShapingFeatures OpenType GSUB Engine Automatic Shaping Pipeline