/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Copyright (C) 2013 Konstantin Ritt ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtGui module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 3 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL3 included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 3 requirements ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 2.0 or (at your option) the GNU General ** Public license version 3 or any later version approved by the KDE Free ** Qt Foundation. The licenses are as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-2.0.html and ** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "qharfbuzzng_p.h" #include #include #include #include "qfontengine_p.h" QT_BEGIN_NAMESPACE // Unicode routines static const hb_script_t _qtscript_to_hbscript[] = { HB_SCRIPT_UNKNOWN, HB_SCRIPT_INHERITED, HB_SCRIPT_COMMON, HB_SCRIPT_LATIN, HB_SCRIPT_GREEK, HB_SCRIPT_CYRILLIC, HB_SCRIPT_ARMENIAN, HB_SCRIPT_HEBREW, HB_SCRIPT_ARABIC, HB_SCRIPT_SYRIAC, HB_SCRIPT_THAANA, HB_SCRIPT_DEVANAGARI, HB_SCRIPT_BENGALI, HB_SCRIPT_GURMUKHI, HB_SCRIPT_GUJARATI, HB_SCRIPT_ORIYA, HB_SCRIPT_TAMIL, HB_SCRIPT_TELUGU, HB_SCRIPT_KANNADA, HB_SCRIPT_MALAYALAM, HB_SCRIPT_SINHALA, HB_SCRIPT_THAI, HB_SCRIPT_LAO, HB_SCRIPT_TIBETAN, HB_SCRIPT_MYANMAR, HB_SCRIPT_GEORGIAN, HB_SCRIPT_HANGUL, HB_SCRIPT_ETHIOPIC, HB_SCRIPT_CHEROKEE, HB_SCRIPT_CANADIAN_ABORIGINAL, HB_SCRIPT_OGHAM, HB_SCRIPT_RUNIC, HB_SCRIPT_KHMER, HB_SCRIPT_MONGOLIAN, HB_SCRIPT_HIRAGANA, HB_SCRIPT_KATAKANA, HB_SCRIPT_BOPOMOFO, HB_SCRIPT_HAN, HB_SCRIPT_YI, HB_SCRIPT_OLD_ITALIC, HB_SCRIPT_GOTHIC, HB_SCRIPT_DESERET, HB_SCRIPT_TAGALOG, HB_SCRIPT_HANUNOO, HB_SCRIPT_BUHID, HB_SCRIPT_TAGBANWA, HB_SCRIPT_COPTIC, // Unicode 4.0 additions HB_SCRIPT_LIMBU, HB_SCRIPT_TAI_LE, HB_SCRIPT_LINEAR_B, HB_SCRIPT_UGARITIC, HB_SCRIPT_SHAVIAN, HB_SCRIPT_OSMANYA, HB_SCRIPT_CYPRIOT, HB_SCRIPT_BRAILLE, // Unicode 4.1 additions HB_SCRIPT_BUGINESE, HB_SCRIPT_NEW_TAI_LUE, HB_SCRIPT_GLAGOLITIC, HB_SCRIPT_TIFINAGH, HB_SCRIPT_SYLOTI_NAGRI, HB_SCRIPT_OLD_PERSIAN, HB_SCRIPT_KHAROSHTHI, // Unicode 5.0 additions HB_SCRIPT_BALINESE, HB_SCRIPT_CUNEIFORM, HB_SCRIPT_PHOENICIAN, HB_SCRIPT_PHAGS_PA, HB_SCRIPT_NKO, // Unicode 5.1 additions HB_SCRIPT_SUNDANESE, HB_SCRIPT_LEPCHA, HB_SCRIPT_OL_CHIKI, HB_SCRIPT_VAI, HB_SCRIPT_SAURASHTRA, HB_SCRIPT_KAYAH_LI, HB_SCRIPT_REJANG, HB_SCRIPT_LYCIAN, HB_SCRIPT_CARIAN, HB_SCRIPT_LYDIAN, HB_SCRIPT_CHAM, // Unicode 5.2 additions HB_SCRIPT_TAI_THAM, HB_SCRIPT_TAI_VIET, HB_SCRIPT_AVESTAN, HB_SCRIPT_EGYPTIAN_HIEROGLYPHS, HB_SCRIPT_SAMARITAN, HB_SCRIPT_LISU, HB_SCRIPT_BAMUM, HB_SCRIPT_JAVANESE, HB_SCRIPT_MEETEI_MAYEK, HB_SCRIPT_IMPERIAL_ARAMAIC, HB_SCRIPT_OLD_SOUTH_ARABIAN, HB_SCRIPT_INSCRIPTIONAL_PARTHIAN, HB_SCRIPT_INSCRIPTIONAL_PAHLAVI, HB_SCRIPT_OLD_TURKIC, HB_SCRIPT_KAITHI, // Unicode 6.0 additions HB_SCRIPT_BATAK, HB_SCRIPT_BRAHMI, HB_SCRIPT_MANDAIC, // Unicode 6.1 additions HB_SCRIPT_CHAKMA, HB_SCRIPT_MEROITIC_CURSIVE, HB_SCRIPT_MEROITIC_HIEROGLYPHS, HB_SCRIPT_MIAO, HB_SCRIPT_SHARADA, HB_SCRIPT_SORA_SOMPENG, HB_SCRIPT_TAKRI, // Unicode 7.0 additions HB_SCRIPT_CAUCASIAN_ALBANIAN, HB_SCRIPT_BASSA_VAH, HB_SCRIPT_DUPLOYAN, HB_SCRIPT_ELBASAN, HB_SCRIPT_GRANTHA, HB_SCRIPT_PAHAWH_HMONG, HB_SCRIPT_KHOJKI, HB_SCRIPT_LINEAR_A, HB_SCRIPT_MAHAJANI, HB_SCRIPT_MANICHAEAN, HB_SCRIPT_MENDE_KIKAKUI, HB_SCRIPT_MODI, HB_SCRIPT_MRO, HB_SCRIPT_OLD_NORTH_ARABIAN, HB_SCRIPT_NABATAEAN, HB_SCRIPT_PALMYRENE, HB_SCRIPT_PAU_CIN_HAU, HB_SCRIPT_OLD_PERMIC, HB_SCRIPT_PSALTER_PAHLAVI, HB_SCRIPT_SIDDHAM, HB_SCRIPT_KHUDAWADI, HB_SCRIPT_TIRHUTA, HB_SCRIPT_WARANG_CITI, // Unicode 8.0 additions HB_SCRIPT_AHOM, HB_SCRIPT_ANATOLIAN_HIEROGLYPHS, HB_SCRIPT_HATRAN, HB_SCRIPT_MULTANI, HB_SCRIPT_OLD_HUNGARIAN, HB_SCRIPT_SIGNWRITING, // Unicode 9.0 additions HB_SCRIPT_ADLAM, HB_SCRIPT_BHAIKSUKI, HB_SCRIPT_MARCHEN, HB_SCRIPT_NEWA, HB_SCRIPT_OSAGE, HB_SCRIPT_TANGUT, // Unicode 10.0 additions HB_SCRIPT_MASARAM_GONDI, HB_SCRIPT_NUSHU, HB_SCRIPT_SOYOMBO, HB_SCRIPT_ZANABAZAR_SQUARE }; Q_STATIC_ASSERT(QChar::ScriptCount == sizeof(_qtscript_to_hbscript) / sizeof(_qtscript_to_hbscript[0])); hb_script_t hb_qt_script_to_script(QChar::Script script) { return _qtscript_to_hbscript[script]; } QChar::Script hb_qt_script_from_script(hb_script_t script) { uint i = QChar::ScriptCount - 1; while (i > QChar::Script_Unknown && _qtscript_to_hbscript[i] != script) --i; return QChar::Script(i); } static hb_unicode_combining_class_t _hb_qt_unicode_combining_class(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t unicode, void * /*user_data*/) { return hb_unicode_combining_class_t(QChar::combiningClass(unicode)); } static unsigned int _hb_qt_unicode_eastasian_width(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t /*unicode*/, void * /*user_data*/) { qCritical("hb_qt_unicode_eastasian_width: not implemented!"); return 1; } static const hb_unicode_general_category_t _qtcategory_to_hbcategory[] = { HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK, // Mn HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK, // Mc HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK, // Me HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER, // Nd HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER, // Nl HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER, // No HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR, // Zs HB_UNICODE_GENERAL_CATEGORY_LINE_SEPARATOR, // Zl HB_UNICODE_GENERAL_CATEGORY_PARAGRAPH_SEPARATOR, // Zp HB_UNICODE_GENERAL_CATEGORY_CONTROL, // Cc HB_UNICODE_GENERAL_CATEGORY_FORMAT, // Cf HB_UNICODE_GENERAL_CATEGORY_SURROGATE, // Cs HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE, // Co HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED, // Cn HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER, // Lu HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER, // Ll HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER, // Lt HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER, // Lm HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER, // Lo HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION, // Pc HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION, // Pd HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION, // Ps HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION, // Pe HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION, // Pi HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION, // Pf HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION, // Po HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL, // Sm HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL, // Sc HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL, // Sk HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL // So }; static hb_unicode_general_category_t _hb_qt_unicode_general_category(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t unicode, void * /*user_data*/) { return _qtcategory_to_hbcategory[QChar::category(unicode)]; } static hb_codepoint_t _hb_qt_unicode_mirroring(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t unicode, void * /*user_data*/) { return QChar::mirroredChar(unicode); } static hb_script_t _hb_qt_unicode_script(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t unicode, void * /*user_data*/) { return _qtscript_to_hbscript[QChar::script(unicode)]; } static hb_bool_t _hb_qt_unicode_compose(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab, void * /*user_data*/) { // ### optimize QString s = QString::fromUcs4(&a, 1) + QString::fromUcs4(&b, 1); QString normalized = s.normalized(QString::NormalizationForm_C); QStringIterator it(normalized); Q_ASSERT(it.hasNext()); // size>0 *ab = it.next(); return !it.hasNext(); // size==1 } static hb_bool_t _hb_qt_unicode_decompose(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b, void * /*user_data*/) { // ### optimize if (QChar::decompositionTag(ab) != QChar::Canonical) // !NFD return false; QString normalized = QChar::decomposition(ab); if (normalized.isEmpty()) return false; QStringIterator it(normalized); Q_ASSERT(it.hasNext()); // size>0 *a = it.next(); if (!it.hasNext()) { // size==1 *b = 0; return *a != ab; } // size>1 *b = it.next(); if (!it.hasNext()) { // size==2 // Here's the ugly part: if ab decomposes to a single character and // that character decomposes again, we have to detect that and undo // the second part :-( const QString recomposed = normalized.normalized(QString::NormalizationForm_C); QStringIterator jt(recomposed); Q_ASSERT(jt.hasNext()); // size>0 const hb_codepoint_t c = jt.next(); if (c != *a && c != ab) { *a = c; *b = 0; } return true; } // size>2 // If decomposed to more than two characters, take the last one, // and recompose the rest to get the first component do { *b = it.next(); } while (it.hasNext()); normalized.chop(QChar::requiresSurrogates(*b) ? 2 : 1); const QString recomposed = normalized.normalized(QString::NormalizationForm_C); QStringIterator jt(recomposed); Q_ASSERT(jt.hasNext()); // size>0 // We expect that recomposed has exactly one character now *a = jt.next(); return true; } static unsigned int _hb_qt_unicode_decompose_compatibility(hb_unicode_funcs_t * /*ufuncs*/, hb_codepoint_t u, hb_codepoint_t *decomposed, void * /*user_data*/) { const QString normalized = QChar::decomposition(u); uint outlen = 0; QStringIterator it(normalized); while (it.hasNext()) { Q_ASSERT(outlen < HB_UNICODE_MAX_DECOMPOSITION_LEN); decomposed[outlen++] = it.next(); } return outlen; } struct _hb_unicode_funcs_t { _hb_unicode_funcs_t() { funcs = hb_unicode_funcs_create(NULL); hb_unicode_funcs_set_combining_class_func(funcs, _hb_qt_unicode_combining_class, NULL, NULL); hb_unicode_funcs_set_eastasian_width_func(funcs, _hb_qt_unicode_eastasian_width, NULL, NULL); hb_unicode_funcs_set_general_category_func(funcs, _hb_qt_unicode_general_category, NULL, NULL); hb_unicode_funcs_set_mirroring_func(funcs, _hb_qt_unicode_mirroring, NULL, NULL); hb_unicode_funcs_set_script_func(funcs, _hb_qt_unicode_script, NULL, NULL); hb_unicode_funcs_set_compose_func(funcs, _hb_qt_unicode_compose, NULL, NULL); hb_unicode_funcs_set_decompose_func(funcs, _hb_qt_unicode_decompose, NULL, NULL); hb_unicode_funcs_set_decompose_compatibility_func(funcs, _hb_qt_unicode_decompose_compatibility, NULL, NULL); } ~_hb_unicode_funcs_t() { hb_unicode_funcs_destroy(funcs); } hb_unicode_funcs_t *funcs; }; Q_GLOBAL_STATIC(_hb_unicode_funcs_t, qt_ufuncs) hb_unicode_funcs_t *hb_qt_get_unicode_funcs() { return qt_ufuncs()->funcs; } // Font routines static hb_bool_t _hb_qt_get_font_h_extents(hb_font_t * /*font*/, void *font_data, hb_font_extents_t *metrics, void * /*user_data*/) { QFontEngine *fe = static_cast(font_data); Q_ASSERT(fe); metrics->ascender = fe->ascent().value(); metrics->descender = fe->descent().value(); metrics->line_gap = fe->leading().value(); return true; } static hb_bool_t _hb_qt_font_get_nominal_glyph(hb_font_t * /*font*/, void *font_data, hb_codepoint_t unicode, hb_codepoint_t *glyph, void * /*user_data*/) { QFontEngine *fe = static_cast(font_data); Q_ASSERT(fe); *glyph = fe->glyphIndex(unicode); return *glyph != 0; } static hb_bool_t _hb_qt_font_get_variation_glyph(hb_font_t * /*font*/, void *font_data, hb_codepoint_t unicode, hb_codepoint_t /*variation_selector*/, hb_codepoint_t *glyph, void * /*user_data*/) { QFontEngine *fe = static_cast(font_data); Q_ASSERT(fe); // ### TODO add support for variation selectors *glyph = fe->glyphIndex(unicode); return *glyph != 0; } static hb_position_t _hb_qt_font_get_glyph_h_advance(hb_font_t *font, void *font_data, hb_codepoint_t glyph, void * /*user_data*/) { QFontEngine *fe = static_cast(font_data); Q_ASSERT(fe); QFixed advance; QGlyphLayout g; g.numGlyphs = 1; g.glyphs = &glyph; g.advances = &advance; fe->recalcAdvances(&g, QFontEngine::ShaperFlags(hb_qt_font_get_use_design_metrics(font))); return advance.value(); } static hb_position_t _hb_qt_font_get_glyph_h_kerning(hb_font_t *font, void *font_data, hb_codepoint_t first_glyph, hb_codepoint_t second_glyph, void * /*user_data*/) { QFontEngine *fe = static_cast(font_data); Q_ASSERT(fe); glyph_t glyphs[2] = { first_glyph, second_glyph }; QFixed advance; QGlyphLayout g; g.numGlyphs = 2; g.glyphs = glyphs; g.advances = &advance; fe->doKerning(&g, QFontEngine::ShaperFlags(hb_qt_font_get_use_design_metrics(font))); return advance.value(); } static hb_bool_t _hb_qt_font_get_glyph_extents(hb_font_t * /*font*/, void *font_data, hb_codepoint_t glyph, hb_glyph_extents_t *extents, void * /*user_data*/) { QFontEngine *fe = static_cast(font_data); Q_ASSERT(fe); glyph_metrics_t gm = fe->boundingBox(glyph); extents->x_bearing = gm.x.value(); extents->y_bearing = gm.y.value(); extents->width = gm.width.value(); extents->height = gm.height.value(); return true; } static hb_bool_t _hb_qt_font_get_glyph_contour_point(hb_font_t * /*font*/, void *font_data, hb_codepoint_t glyph, unsigned int point_index, hb_position_t *x, hb_position_t *y, void * /*user_data*/) { QFontEngine *fe = static_cast(font_data); Q_ASSERT(fe); QFixed xpos, ypos; quint32 numPoints = 1; if (Q_LIKELY(fe->getPointInOutline(glyph, 0, point_index, &xpos, &ypos, &numPoints) == 0)) { *x = xpos.value(); *y = ypos.value(); return true; } *x = *y = 0; return false; } static hb_user_data_key_t _useDesignMetricsKey; void hb_qt_font_set_use_design_metrics(hb_font_t *font, uint value) { hb_font_set_user_data(font, &_useDesignMetricsKey, (void *)quintptr(value), NULL, true); } uint hb_qt_font_get_use_design_metrics(hb_font_t *font) { return quintptr(hb_font_get_user_data(font, &_useDesignMetricsKey)); } struct _hb_qt_font_funcs_t { _hb_qt_font_funcs_t() { funcs = hb_font_funcs_create(); hb_font_funcs_set_font_h_extents_func(funcs, _hb_qt_get_font_h_extents, NULL, NULL); hb_font_funcs_set_nominal_glyph_func(funcs, _hb_qt_font_get_nominal_glyph, NULL, NULL); hb_font_funcs_set_variation_glyph_func(funcs, _hb_qt_font_get_variation_glyph, NULL, NULL); hb_font_funcs_set_glyph_h_advance_func(funcs, _hb_qt_font_get_glyph_h_advance, NULL, NULL); hb_font_funcs_set_glyph_h_kerning_func(funcs, _hb_qt_font_get_glyph_h_kerning, NULL, NULL); hb_font_funcs_set_glyph_extents_func(funcs, _hb_qt_font_get_glyph_extents, NULL, NULL); hb_font_funcs_set_glyph_contour_point_func(funcs, _hb_qt_font_get_glyph_contour_point, NULL, NULL); hb_font_funcs_make_immutable(funcs); } ~_hb_qt_font_funcs_t() { hb_font_funcs_destroy(funcs); } hb_font_funcs_t *funcs; }; Q_GLOBAL_STATIC(_hb_qt_font_funcs_t, qt_ffuncs) hb_font_funcs_t *hb_qt_get_font_funcs() { return qt_ffuncs()->funcs; } static hb_blob_t * _hb_qt_reference_table(hb_face_t * /*face*/, hb_tag_t tag, void *user_data) { QFontEngine::FaceData *data = static_cast(user_data); Q_ASSERT(data); qt_get_font_table_func_t get_font_table = data->get_font_table; Q_ASSERT(get_font_table); uint length = 0; if (Q_UNLIKELY(!get_font_table(data->user_data, tag, 0, &length))) return hb_blob_get_empty(); char *buffer = static_cast(malloc(length)); Q_CHECK_PTR(buffer); if (Q_UNLIKELY(!get_font_table(data->user_data, tag, reinterpret_cast(buffer), &length))) length = 0; return hb_blob_create(const_cast(buffer), length, HB_MEMORY_MODE_READONLY, buffer, free); } static inline hb_face_t * _hb_qt_face_create(QFontEngine *fe) { QFontEngine::FaceData *data = static_cast(malloc(sizeof(QFontEngine::FaceData))); Q_CHECK_PTR(data); data->user_data = fe->faceData.user_data; data->get_font_table = fe->faceData.get_font_table; hb_face_t *face = hb_face_create_for_tables(_hb_qt_reference_table, (void *)data, free); if (Q_UNLIKELY(hb_face_is_immutable(face))) { hb_face_destroy(face); return NULL; } hb_face_set_index(face, fe->faceId().index); hb_face_set_upem(face, fe->emSquareSize().truncate()); return face; } static void _hb_qt_face_release(void *user_data) { if (Q_LIKELY(user_data)) hb_face_destroy(static_cast(user_data)); } hb_face_t *hb_qt_face_get_for_engine(QFontEngine *fe) { Q_ASSERT(fe && fe->type() != QFontEngine::Multi); if (Q_UNLIKELY(!fe->face_)) fe->face_ = QFontEngine::Holder(_hb_qt_face_create(fe), _hb_qt_face_release); return static_cast(fe->face_.get()); } static inline hb_font_t * _hb_qt_font_create(QFontEngine *fe) { hb_face_t *face = hb_qt_face_get_for_engine(fe); if (Q_UNLIKELY(!face)) return NULL; hb_font_t *font = hb_font_create(face); if (Q_UNLIKELY(hb_font_is_immutable(font))) { hb_font_destroy(font); return NULL; } const int y_ppem = fe->fontDef.pixelSize; const int x_ppem = (fe->fontDef.pixelSize * fe->fontDef.stretch) / 100; hb_font_set_funcs(font, hb_qt_get_font_funcs(), (void *)fe, NULL); hb_font_set_scale(font, QFixed(x_ppem).value(), -QFixed(y_ppem).value()); hb_font_set_ppem(font, x_ppem, y_ppem); hb_font_set_ptem(font, fe->fontDef.pointSize); return font; } static void _hb_qt_font_release(void *user_data) { if (Q_LIKELY(user_data)) hb_font_destroy(static_cast(user_data)); } hb_font_t *hb_qt_font_get_for_engine(QFontEngine *fe) { Q_ASSERT(fe && fe->type() != QFontEngine::Multi); if (Q_UNLIKELY(!fe->font_)) fe->font_ = QFontEngine::Holder(_hb_qt_font_create(fe), _hb_qt_font_release); return static_cast(fe->font_.get()); } QT_END_NAMESPACE