THotPDF font fallback-metoder
Konfigurerer ordnede fallback-skrifter og eksponerer dæknings- og vertikalmetrik-diagnostik
Deklarationer
procedure SetFontFallbackChain(Script: THPDFFontScript;
const FontNames: array of AnsiString);
procedure ClearFontFallbackChain(Script: THPDFFontScript);
procedure ClearAllFontFallbackChains;
function FontFallbackCount(Script: THPDFFontScript): Integer;
function FontFallbackName(Script: THPDFFontScript;
Index: Integer): AnsiString;
function FontScriptForCodePoint(CodePoint: Cardinal): THPDFFontScript;
function ResolveFontForCodePoint(CodePoint: Cardinal;
const PrimaryFontName: AnsiString;
out ResolvedFontName: AnsiString): boolean; overload;
function ResolveFontForCodePoint(CodePoint: Cardinal;
const PrimaryFontName: AnsiString; const FontStyle: TFontStyles;
out ResolvedFontName: AnsiString): boolean; overload;
function AnalyzeUnresolvedGlyphs(const Text: WideString;
const PrimaryFontName: AnsiString): THPDFUnresolvedGlyphInfoArray; overload;
function AnalyzeUnresolvedGlyphs(const Text: WideString;
const PrimaryFontName: AnsiString; const FontStyle: TFontStyles):
THPDFUnresolvedGlyphInfoArray; overload;
function GetUnresolvedGlyphs: THPDFUnresolvedGlyphInfoArray;
procedure ClearUnresolvedGlyphs;
function GetVerticalGlyphMetrics(CodePoint: Cardinal;
out AdvanceY, OriginY: Integer): boolean;
procedure SetVerticalDefaultMetrics(AdvanceY, OriginY: Integer);
Typer
THPDFFontScript = (hfsCommon, hfsLatin, hfsGreek, hfsCyrillic,
hfsHebrew, hfsArabic, hfsIndic, hfsSoutheastAsian, hfsCJK,
hfsKana, hfsHangul, hfsEmoji, hfsOther);
THPDFUnresolvedGlyphInfo = record
CodePoint: Cardinal;
FontName: AnsiString;
Script: THPDFFontScript;
SuggestedFonts: AnsiString;
end;
THPDFUnresolvedGlyphInfoArray = array of THPDFUnresolvedGlyphInfo;
Medlemsemner
- SetFontFallbackChain
- ClearFontFallbackChain
- ClearAllFontFallbackChains
- FontFallbackCount
- FontFallbackName
- FontScriptForCodePoint
- ResolveFontForCodePoint
- AnalyzeUnresolvedGlyphs
- GetUnresolvedGlyphs
- ClearUnresolvedGlyphs
- GetVerticalGlyphMetrics
- SetVerticalDefaultMetrics
- VerticalDefaultAdvanceY
- VerticalDefaultOriginY
Adfærd
ResolveFontForCodePointkontrollerer den primære skrift først, derefter den matchende skriftkæde og derefterhfsCommon- Resultatet er kun sandt, når en installeret skrift afklarer skalaren uden GDI-skrift-substitution
- Gentagne familie-, skriftsnit- og skalar-afprøvninger bruger en afgrænset 1024-posters cache, der invalideres efter registrering af privat skrifttype
- Eksplicit stil-overloads inspicerer den valgte fed/kursiv-variant; de oprindelige overloads bevarer adfærden med regulært skriftsnit
AnalyzeUnresolvedGlyphsdeduplicerer gentagne uafklarede skalar- og primærskrift-parGetVerticalGlyphMetricsreturnerer registrerede OpenType vertikale metrikker, når de er tilgængelige, og eksponerer de konfigurerede standarder ellersSetVerticalDefaultMetricskræver en positiv advance i 1000-enheds glyph-rum