THotPDF.ShapingFeatures Property

THotPDF API reference

Controls HotPDF's opt-in producer-side shaping, positioning, localised-form, and script-preprocess pipeline

Delphi syntax

property ShapingFeatures: THPDFShapingFeatures read FShapingFeatures write FShapingFeatures;

type THPDFShapingFeature = (sfArabicGSUB, sfStandardLigatures, sfContextualLigatures, sfStylisticAlternates, sfIndicShaping, sfContextualAlternates, sfKerning, sfMarkPositioning, sfTibetanShaping, sfMongolianShaping, sfIndicGSUB, sfLocalizedForms, sfVerticalKerning, sfThaiLaoReorder, sfHebrewReorder, sfJavaneseShaping, sfMarkToLigature, sfCursiveAttachment, sfDiscretionaryLigatures, sfHistoricalLigatures, sfSmallCaps, sfCapsToSmallCaps, sfOldstyleFigures, sfLiningFigures, sfSuperscripts, sfSubscripts, sfOrdinals, sfFractions, sfTaiVietReorder, sfMeeteiMayekShaping, sfDistancePositioning, sfKhmerShaping, sfMyanmarShaping, sfVerticalAlternates, sfCaseSensitiveForms, sfSlashedZero, sfProportionalFigures, sfTabularFigures, sfScientificInferiors, sfNumerators, sfDenominators);

Covered APIs

API	Usage notes
`sfArabicGSUB`	Enables native Arabic GSUB contextual shaping
`sfStandardLigatures`	Applies standard Latin ligatures through `liga`
`sfContextualLigatures`	Applies contextual ligatures through `clig`
`sfStylisticAlternates`	Enables caller-controlled stylistic alternate workflows
`sfIndicShaping`	Enables conservative Indic syllable reordering
`sfContextualAlternates`	Applies required contextual alternates through `rclt`
`sfKerning`	Enables GPOS pair kerning
`sfMarkPositioning`	Enables GPOS Mark-to-Base and Mark-to-Mark offsets
`sfTibetanShaping`	Enables Tibetan GSUB shaping
`sfMongolianShaping`	Enables Mongolian positional-form shaping
`sfIndicGSUB`	Enables Indic reorder plus GSUB feature application
`sfLocalizedForms`	Applies localised-form substitutions through `locl`
`sfVerticalKerning`	Enables vertical kerning through `vkrn` and `vpal`
`sfThaiLaoReorder`	Enables Thai/Lao SARA AM decomposition and mark ordering
`sfHebrewReorder`	Enables Hebrew mark ordering by canonical combining class
`sfJavaneseShaping`	Enables Javanese pre-base vowel-sign reorder
`sfMarkToLigature`	Enables GPOS Mark-to-Ligature placement
`sfCursiveAttachment`	Enables GPOS cursive entry/exit anchor alignment
`sfDiscretionaryLigatures`	Applies discretionary ligatures through `dlig`
`sfHistoricalLigatures`	Applies historical ligatures through `hlig`
`sfSmallCaps`	Applies small-cap substitutions through `smcp`
`sfCapsToSmallCaps`	Applies capital-to-small-cap substitutions through `c2sc`
`sfOldstyleFigures`	Applies oldstyle figures through `onum`
`sfLiningFigures`	Applies lining figures through `lnum`
`sfSuperscripts`	Applies superscript glyphs through `sups`
`sfSubscripts`	Applies subscript glyphs through `subs`
`sfOrdinals`	Applies ordinal glyphs through `ordn`
`sfFractions`	Applies fraction substitutions through `frac`
`sfTaiVietReorder`	Enables Tai Viet vowel and mark ordering
`sfMeeteiMayekShaping`	Enables Meetei Mayek syllable reorder
`sfDistancePositioning`	Enables GPOS distance positioning
`sfKhmerShaping`	Enables Khmer pre-base vowel and cluster reorder
`sfMyanmarShaping`	Enables Myanmar kinzi, pre-base vowel, medial, and mark reorder
`sfVerticalAlternates`	Applies vertical alternates through `vert` and `vrt2`
`sfCaseSensitiveForms`	Applies case-sensitive forms through `case`
`sfSlashedZero`	Applies slashed zero through `zero`
`sfProportionalFigures`	Applies proportional figures through `pnum`
`sfTabularFigures`	Applies tabular figures through `tnum`
`sfScientificInferiors`	Applies scientific inferiors through `sinf`
`sfNumerators`	Applies numerators through `numr`
`sfDenominators`	Applies denominators through `dnom`

Usage notes

Use this property after RegisterUnicodeTTF and before writing text. Choose typographic feature and figure-style flags, GPOS flags for spacing and anchors, and script-specific preprocess flags before cmap-to-GID mapping