diff options
Diffstat (limited to 'src/gui/text')
-rw-r--r-- | src/gui/text/qtextengine.cpp | 65 | ||||
-rw-r--r-- | src/gui/text/qtextengine_p.h | 17 | ||||
-rw-r--r-- | src/gui/text/qtextlayout.cpp | 14 |
3 files changed, 71 insertions, 25 deletions
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp index 8374c62158..03717dca2f 100644 --- a/src/gui/text/qtextengine.cpp +++ b/src/gui/text/qtextengine.cpp @@ -1392,6 +1392,7 @@ void QTextEngine::invalidate() maxWidth = 0; if (specialData) specialData->resolvedFormatIndices.clear(); + feCache.reset(); } void QTextEngine::clearLineData() @@ -1783,6 +1784,13 @@ QFont QTextEngine::font(const QScriptItem &si) const return font; } +QTextEngine::FontEngineCache::FontEngineCache() +{ + reset(); +} + +//we cache the previous results of this function, as calling it numerous times with the same effective +//input is common (and hard to cache at a higher level) QFontEngine *QTextEngine::fontEngine(const QScriptItem &si, QFixed *ascent, QFixed *descent, QFixed *leading) const { QFontEngine *engine = 0; @@ -1791,28 +1799,47 @@ QFontEngine *QTextEngine::fontEngine(const QScriptItem &si, QFixed *ascent, QFix QFont font = fnt; if (hasFormats()) { - QTextCharFormat f = format(&si); - font = f.font(); - - if (block.docHandle() && block.docHandle()->layout()) { - // Make sure we get the right dpi on printers - QPaintDevice *pdev = block.docHandle()->layout()->paintDevice(); - if (pdev) - font = QFont(font, pdev); + if (feCache.prevFontEngine && feCache.prevPosition == si.position && feCache.prevLength == length(&si) && feCache.prevScript == script) { + engine = feCache.prevFontEngine; + scaledEngine = feCache.prevScaledFontEngine; } else { - font = font.resolve(fnt); - } - engine = font.d->engineForScript(script); - QTextCharFormat::VerticalAlignment valign = f.verticalAlignment(); - if (valign == QTextCharFormat::AlignSuperScript || valign == QTextCharFormat::AlignSubScript) { - if (font.pointSize() != -1) - font.setPointSize((font.pointSize() * 2) / 3); - else - font.setPixelSize((font.pixelSize() * 2) / 3); - scaledEngine = font.d->engineForScript(script); + QTextCharFormat f = format(&si); + font = f.font(); + + if (block.docHandle() && block.docHandle()->layout()) { + // Make sure we get the right dpi on printers + QPaintDevice *pdev = block.docHandle()->layout()->paintDevice(); + if (pdev) + font = QFont(font, pdev); + } else { + font = font.resolve(fnt); + } + engine = font.d->engineForScript(script); + QTextCharFormat::VerticalAlignment valign = f.verticalAlignment(); + if (valign == QTextCharFormat::AlignSuperScript || valign == QTextCharFormat::AlignSubScript) { + if (font.pointSize() != -1) + font.setPointSize((font.pointSize() * 2) / 3); + else + font.setPixelSize((font.pixelSize() * 2) / 3); + scaledEngine = font.d->engineForScript(script); + } + feCache.prevFontEngine = engine; + feCache.prevScaledFontEngine = scaledEngine; + feCache.prevScript = script; + feCache.prevPosition = si.position; + feCache.prevLength = length(&si); } } else { - engine = font.d->engineForScript(script); + if (feCache.prevFontEngine && feCache.prevScript == script && feCache.prevPosition == -1) + engine = feCache.prevFontEngine; + else { + engine = font.d->engineForScript(script); + feCache.prevFontEngine = engine; + feCache.prevScript = script; + feCache.prevPosition = -1; + feCache.prevLength = -1; + feCache.prevScaledFontEngine = 0; + } } if (si.analysis.flags == QScriptAnalysis::SmallCaps) { diff --git a/src/gui/text/qtextengine_p.h b/src/gui/text/qtextengine_p.h index 86551a4a86..c920c7ba6e 100644 --- a/src/gui/text/qtextengine_p.h +++ b/src/gui/text/qtextengine_p.h @@ -558,6 +558,23 @@ public: mutable QScriptLineArray lines; + struct FontEngineCache { + FontEngineCache(); + mutable QFontEngine *prevFontEngine; + mutable QFontEngine *prevScaledFontEngine; + mutable int prevScript; + mutable int prevPosition; + mutable int prevLength; + inline void reset() { + prevFontEngine = 0; + prevScaledFontEngine = 0; + prevScript = -1; + prevPosition = -1; + prevLength = -1; + } + }; + mutable FontEngineCache feCache; + QString text; QFont fnt; QTextBlock block; diff --git a/src/gui/text/qtextlayout.cpp b/src/gui/text/qtextlayout.cpp index 86c6f48919..183bcea72d 100644 --- a/src/gui/text/qtextlayout.cpp +++ b/src/gui/text/qtextlayout.cpp @@ -386,6 +386,7 @@ QTextLayout::~QTextLayout() void QTextLayout::setFont(const QFont &font) { d->fnt = font; + d->feCache.reset(); } /*! @@ -518,6 +519,7 @@ void QTextLayout::setAdditionalFormats(const QList<FormatRange> &formatList) } if (d->block.docHandle()) d->block.docHandle()->documentChange(d->block.position(), d->block.length()); + d->feCache.reset(); } /*! @@ -1867,14 +1869,14 @@ void QTextLine::layout_helper(int maxGlyphs) lbh.currentPosition = qMax(line.from, current.position); end = current.position + eng->length(item); lbh.glyphs = eng->shapedGlyphs(¤t); + QFontEngine *fontEngine = eng->fontEngine(current); + if (lbh.fontEngine != fontEngine) { + lbh.fontEngine = fontEngine; + lbh.minimumRightBearing = qMin(QFixed(), + QFixed::fromReal(fontEngine->minRightBearing())); + } } const QScriptItem ¤t = eng->layoutData->items[item]; - QFontEngine *fontEngine = eng->fontEngine(current); - if (lbh.fontEngine != fontEngine) { - lbh.fontEngine = fontEngine; - lbh.minimumRightBearing = qMin(QFixed(), - QFixed::fromReal(fontEngine->minRightBearing())); - } lbh.tmpData.leading = qMax(lbh.tmpData.leading + lbh.tmpData.ascent, current.leading + current.ascent) - qMax(lbh.tmpData.ascent, |