From 774527dd1e85da6ab91cba9b0e5897ba90f4c828 Mon Sep 17 00:00:00 2001 From: Jiang Jiang Date: Wed, 27 Apr 2011 16:05:09 +0200 Subject: [PATCH] Use maximum ascent/descent/leading from fallback fonts in shaping When shaping a QScriptItem with a multi font engine, currently we only take the ascent/descent/leading from the primary (first) font engine in that multi font engine, however, subsequent engines used during shaping may have larger ascent/descent/leading, disregarding them may cause clipping issues in some cases. It's fixed by checking each font engine used in the shaping process and take the maximum value instead of the first one. On ATSUI we merely make it compile. Task-number: QTBUG-16719 Reviewed-by: Eskil (cherry picked from commit c501403cb5a0c9ec21b00e0c2f640ae85566e0cf) --- src/gui/text/qfontengine_coretext.mm | 13 ++++++++++--- src/gui/text/qfontengine_coretext_p.h | 3 ++- src/gui/text/qfontengine_mac.mm | 2 +- src/gui/text/qfontengine_mac_p.h | 2 +- src/gui/text/qtextengine.cpp | 4 ++++ src/gui/text/qtextengine_mac.cpp | 4 ++-- 6 files changed, 20 insertions(+), 8 deletions(-) diff --git a/src/gui/text/qfontengine_coretext.mm b/src/gui/text/qfontengine_coretext.mm index c4d2d47..d4df218 100644 --- a/src/gui/text/qfontengine_coretext.mm +++ b/src/gui/text/qfontengine_coretext.mm @@ -162,8 +162,10 @@ uint QCoreTextFontEngineMulti::fontIndexForFont(CTFontRef font) const return engines.count() - 1; } -bool QCoreTextFontEngineMulti::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags, - unsigned short *logClusters, const HB_CharAttributes *) const +bool QCoreTextFontEngineMulti::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, + int *nglyphs, QTextEngine::ShaperFlags flags, + unsigned short *logClusters, const HB_CharAttributes *, + QScriptItem *si) const { QCFType cfstring = CFStringCreateWithCharactersNoCopy(0, reinterpret_cast(str), @@ -254,7 +256,12 @@ bool QCoreTextFontEngineMulti::stringToCMap(const QChar *str, int len, QGlyphLay if (!runAttribs) runAttribs = attributeDict; CTFontRef runFont = static_cast(CFDictionaryGetValue(runAttribs, NSFontAttributeName)); - const uint fontIndex = (fontIndexForFont(runFont) << 24); + uint fontIndex = fontIndexForFont(runFont); + const QFontEngine *engine = engineAt(fontIndex); + fontIndex <<= 24; + si->ascent = qMax(engine->ascent(), si->ascent); + si->descent = qMax(engine->descent(), si->descent); + si->leading = qMax(engine->leading(), si->leading); //NSLog(@"Run Font Name = %@", CTFontCopyFamilyName(runFont)); if (endWithPDF) glyphCount--; diff --git a/src/gui/text/qfontengine_coretext_p.h b/src/gui/text/qfontengine_coretext_p.h index aa5f91a..bb80a9b 100644 --- a/src/gui/text/qfontengine_coretext_p.h +++ b/src/gui/text/qfontengine_coretext_p.h @@ -120,7 +120,8 @@ public: QTextEngine::ShaperFlags flags) const; bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags, - unsigned short *logClusters, const HB_CharAttributes *charAttributes) const; + unsigned short *logClusters, const HB_CharAttributes *charAttributes, + QScriptItem *si) const; virtual const char *name() const { return "CoreText"; } protected: diff --git a/src/gui/text/qfontengine_mac.mm b/src/gui/text/qfontengine_mac.mm index 673a7c8..9f094ad 100644 --- a/src/gui/text/qfontengine_mac.mm +++ b/src/gui/text/qfontengine_mac.mm @@ -377,7 +377,7 @@ bool QFontEngineMacMulti::stringToCMap(const QChar *str, int len, QGlyphLayout * } bool QFontEngineMacMulti::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags, - unsigned short *logClusters, const HB_CharAttributes *charAttributes) const + unsigned short *logClusters, const HB_CharAttributes *charAttributes, QScriptItem *) const { if (*nglyphs < len) { *nglyphs = len; diff --git a/src/gui/text/qfontengine_mac_p.h b/src/gui/text/qfontengine_mac_p.h index 385fa83..292ea98 100644 --- a/src/gui/text/qfontengine_mac_p.h +++ b/src/gui/text/qfontengine_mac_p.h @@ -131,7 +131,7 @@ public: virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const; bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags, - unsigned short *logClusters, const HB_CharAttributes *charAttributes) const; + unsigned short *logClusters, const HB_CharAttributes *charAttributes, QScriptItem *) const; virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const; virtual void doKerning(QGlyphLayout *, QTextEngine::ShaperFlags) const; diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp index cc150c5..ff27bc6 100644 --- a/src/gui/text/qtextengine.cpp +++ b/src/gui/text/qtextengine.cpp @@ -1274,6 +1274,10 @@ void QTextEngine::shapeTextWithHarfbuzz(int item) const actualFontEngine = static_cast(font)->engine(engineIdx); } + si.ascent = qMax(actualFontEngine->ascent(), si.ascent); + si.descent = qMax(actualFontEngine->descent(), si.descent); + si.leading = qMax(actualFontEngine->leading(), si.leading); + shaper_item.font = actualFontEngine->harfbuzzFont(); shaper_item.face = actualFontEngine->harfbuzzFace(); diff --git a/src/gui/text/qtextengine_mac.cpp b/src/gui/text/qtextengine_mac.cpp index 97e8c5b..2c6e579 100644 --- a/src/gui/text/qtextengine_mac.cpp +++ b/src/gui/text/qtextengine_mac.cpp @@ -605,11 +605,11 @@ void QTextEngine::shapeTextMac(int item) const unsigned short *log_clusters = logClusters(&si); bool stringToCMapFailed = false; - if (!fe->stringToCMap(str, len, &g, &num_glyphs, flags, log_clusters, attributes())) { + if (!fe->stringToCMap(str, len, &g, &num_glyphs, flags, log_clusters, attributes(), &si)) { ensureSpace(num_glyphs); g = availableGlyphs(&si); stringToCMapFailed = !fe->stringToCMap(str, len, &g, &num_glyphs, flags, log_clusters, - attributes()); + attributes(), &si); } if (!stringToCMapFailed) { -- 2.7.4