QStringList QFontconfigDatabase::fallbacksForFamily(const QString family, const QFont::Style &style, const QFont::StyleHint &styleHint, const QUnicodeTables::Script &script) const { QStringList fallbackFamilies; FcPattern *pattern = FcPatternCreate(); if (!pattern) return fallbackFamilies; FcValue value; value.type = FcTypeString; QByteArray cs = family.toUtf8(); value.u.s = (const FcChar8 *)cs.data(); FcPatternAdd(pattern,FC_FAMILY,value,true); int slant_value = FC_SLANT_ROMAN; if (style == QFont::StyleItalic) slant_value = FC_SLANT_ITALIC; else if (style == QFont::StyleOblique) slant_value = FC_SLANT_OBLIQUE; FcPatternAddInteger(pattern, FC_SLANT, slant_value); if (script != QUnicodeTables::Common && *specialLanguages[script] != '\0') { Q_ASSERT(script < QUnicodeTables::ScriptCount); FcLangSet *ls = FcLangSetCreate(); FcLangSetAdd(ls, (const FcChar8*)specialLanguages[script]); FcPatternAddLangSet(pattern, FC_LANG, ls); FcLangSetDestroy(ls); } const char *stylehint = getFcFamilyForStyleHint(styleHint); if (stylehint) { value.u.s = (const FcChar8 *)stylehint; FcPatternAddWeak(pattern, FC_FAMILY, value, FcTrue); } FcConfigSubstitute(0, pattern, FcMatchPattern); FcDefaultSubstitute(pattern); FcResult result = FcResultMatch; FcFontSet *fontSet = FcFontSort(0,pattern,FcFalse,0,&result); FcPatternDestroy(pattern); if (fontSet) { for (int i = 0; i < fontSet->nfont; i++) { FcChar8 *value = 0; if (FcPatternGetString(fontSet->fonts[i], FC_FAMILY, 0, &value) != FcResultMatch) continue; // capitalize(value); QString familyName = QString::fromUtf8((const char *)value); if (!fallbackFamilies.contains(familyName,Qt::CaseInsensitive)) { fallbackFamilies << familyName; } } FcFontSetDestroy(fontSet); } // qDebug() << "fallbackFamilies for:" << family << fallbackFamilies; return fallbackFamilies; }
CAMLprim value pattern_addweak(value pat, value prop, value append) { CAMLparam0(); FcPatternAddWeak(FcPattern_val(pat), String_val(Field(prop, 0)), fcvalue_from_caml(Field(prop, 1)), Bool_val(append) ? FcTrue : FcFalse); CAMLreturn(Val_unit); }
QStringList QFontconfigDatabase::fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QChar::Script script) const { QStringList fallbackFamilies; FcPattern *pattern = FcPatternCreate(); if (!pattern) return fallbackFamilies; FcValue value; value.type = FcTypeString; QByteArray cs = family.toUtf8(); value.u.s = (const FcChar8 *)cs.data(); FcPatternAdd(pattern,FC_FAMILY,value,true); int slant_value = FC_SLANT_ROMAN; if (style == QFont::StyleItalic) slant_value = FC_SLANT_ITALIC; else if (style == QFont::StyleOblique) slant_value = FC_SLANT_OBLIQUE; FcPatternAddInteger(pattern, FC_SLANT, slant_value); Q_ASSERT(uint(script) < QChar::ScriptCount); if (*specialLanguages[script] != '\0') { FcLangSet *ls = FcLangSetCreate(); FcLangSetAdd(ls, (const FcChar8*)specialLanguages[script]); FcPatternAddLangSet(pattern, FC_LANG, ls); FcLangSetDestroy(ls); } else if (!family.isEmpty()) { // If script is Common or Han, then it may include languages like CJK, // we should attach system default language set to the pattern // to obtain correct font fallback list (i.e. if LANG=zh_CN // then we normally want to use a Chinese font for CJK text; // while a Japanese font should be used for that if LANG=ja) FcPattern *dummy = FcPatternCreate(); FcDefaultSubstitute(dummy); FcChar8 *lang = 0; FcResult res = FcPatternGetString(dummy, FC_LANG, 0, &lang); if (res == FcResultMatch) FcPatternAddString(pattern, FC_LANG, lang); FcPatternDestroy(dummy); } const char *stylehint = getFcFamilyForStyleHint(styleHint); if (stylehint) { value.u.s = (const FcChar8 *)stylehint; FcPatternAddWeak(pattern, FC_FAMILY, value, FcTrue); } FcConfigSubstitute(0, pattern, FcMatchPattern); FcDefaultSubstitute(pattern); FcResult result = FcResultMatch; FcFontSet *fontSet = FcFontSort(0,pattern,FcFalse,0,&result); FcPatternDestroy(pattern); if (fontSet) { for (int i = 0; i < fontSet->nfont; i++) { FcChar8 *value = 0; if (FcPatternGetString(fontSet->fonts[i], FC_FAMILY, 0, &value) != FcResultMatch) continue; // capitalize(value); QString familyName = QString::fromUtf8((const char *)value); if (!fallbackFamilies.contains(familyName,Qt::CaseInsensitive) && familyName.compare(family, Qt::CaseInsensitive)) { fallbackFamilies << familyName; } } FcFontSetDestroy(fontSet); } // qDebug() << "fallbackFamilies for:" << family << style << styleHint << script << fallbackFamilies; return fallbackFamilies; }