summaryrefslogtreecommitdiffstats
path: root/src/gui/text/qtextengine.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/gui/text/qtextengine.cpp')
-rw-r--r--src/gui/text/qtextengine.cpp137
1 files changed, 92 insertions, 45 deletions
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index 9271f34..cff3641 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -1385,6 +1385,15 @@ void QTextEngine::shape(int item) const
}
}
+static inline void releaseCachedFontEngine(QFontEngine *fontEngine)
+{
+ if (fontEngine) {
+ fontEngine->ref.deref();
+ if (fontEngine->cache_count == 0 && fontEngine->ref == 0)
+ delete fontEngine;
+ }
+}
+
void QTextEngine::invalidate()
{
freeMemory();
@@ -1392,6 +1401,10 @@ void QTextEngine::invalidate()
maxWidth = 0;
if (specialData)
specialData->resolvedFormatIndices.clear();
+
+ releaseCachedFontEngine(feCache.prevFontEngine);
+ releaseCachedFontEngine(feCache.prevScaledFontEngine);
+ feCache.reset();
}
void QTextEngine::clearLineData()
@@ -1564,19 +1577,13 @@ bool QTextEngine::isRightToLeft() const
int QTextEngine::findItem(int strPos) const
{
itemize();
- int left = 0;
- int right = layoutData->items.size()-1;
- while(left <= right) {
- int middle = ((right-left)/2)+left;
- if (strPos > layoutData->items[middle].position)
- left = middle+1;
- else if(strPos < layoutData->items[middle].position)
- right = middle-1;
- else {
- return middle;
- }
+
+ int item;
+ for (item = layoutData->items.size()-1; item > 0; --item) {
+ if (layoutData->items[item].position <= strPos)
+ break;
}
- return right;
+ return item;
}
QFixed QTextEngine::width(int from, int len) const
@@ -1783,6 +1790,13 @@ 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 +1805,53 @@ 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;
+ if (engine)
+ engine->ref.ref();
+ feCache.prevScaledFontEngine = scaledEngine;
+ if (scaledEngine)
+ scaledEngine->ref.ref();
+ 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;
+ if (engine)
+ engine->ref.ref();
+ feCache.prevScript = script;
+ feCache.prevPosition = -1;
+ feCache.prevLength = -1;
+ feCache.prevScaledFontEngine = 0;
+ }
}
if (si.analysis.flags == QScriptAnalysis::SmallCaps) {
@@ -2744,6 +2783,7 @@ int QTextEngine::positionInLigature(const QScriptItem *si, int end,
}
const HB_CharAttributes *attrs = attributes();
+ logClusters = this->logClusters(si);
clusterLength = getClusterLength(logClusters, attrs, 0, end, glyph_pos, &clusterStart);
if (clusterLength) {
@@ -2778,6 +2818,22 @@ QTextItemInt::QTextItemInt(const QScriptItem &si, QFont *font, const QTextCharFo
: justified(false), underlineStyle(QTextCharFormat::NoUnderline), charFormat(format),
num_chars(0), chars(0), logClusters(0), f(0), fontEngine(0)
{
+ f = font;
+ fontEngine = f->d->engineForScript(si.analysis.script);
+ Q_ASSERT(fontEngine);
+
+ initWithScriptItem(si);
+}
+
+QTextItemInt::QTextItemInt(const QGlyphLayout &g, QFont *font, const QChar *chars_, int numChars, QFontEngine *fe, const QTextCharFormat &format)
+ : flags(0), justified(false), underlineStyle(QTextCharFormat::NoUnderline), charFormat(format),
+ num_chars(numChars), chars(chars_), logClusters(0), f(font), glyphs(g), fontEngine(fe)
+{
+}
+
+// Fix up flags and underlineStyle with given info
+void QTextItemInt::initWithScriptItem(const QScriptItem &si)
+{
// explicitly initialize flags so that initFontAttributes can be called
// multiple times on the same TextItem
flags = 0;
@@ -2785,13 +2841,10 @@ QTextItemInt::QTextItemInt(const QScriptItem &si, QFont *font, const QTextCharFo
flags |= QTextItem::RightToLeft;
ascent = si.ascent;
descent = si.descent;
- f = font;
- fontEngine = f->d->engineForScript(si.analysis.script);
- Q_ASSERT(fontEngine);
- if (format.hasProperty(QTextFormat::TextUnderlineStyle)) {
- underlineStyle = format.underlineStyle();
- } else if (format.boolProperty(QTextFormat::FontUnderline)
+ if (charFormat.hasProperty(QTextFormat::TextUnderlineStyle)) {
+ underlineStyle = charFormat.underlineStyle();
+ } else if (charFormat.boolProperty(QTextFormat::FontUnderline)
|| f->d->underline) {
underlineStyle = QTextCharFormat::SingleUnderline;
}
@@ -2800,18 +2853,12 @@ QTextItemInt::QTextItemInt(const QScriptItem &si, QFont *font, const QTextCharFo
if (underlineStyle == QTextCharFormat::SingleUnderline)
flags |= QTextItem::Underline;
- if (f->d->overline || format.fontOverline())
+ if (f->d->overline || charFormat.fontOverline())
flags |= QTextItem::Overline;
- if (f->d->strikeOut || format.fontStrikeOut())
+ if (f->d->strikeOut || charFormat.fontStrikeOut())
flags |= QTextItem::StrikeOut;
}
-QTextItemInt::QTextItemInt(const QGlyphLayout &g, QFont *font, const QChar *chars_, int numChars, QFontEngine *fe)
- : flags(0), justified(false), underlineStyle(QTextCharFormat::NoUnderline),
- num_chars(numChars), chars(chars_), logClusters(0), f(font), glyphs(g), fontEngine(fe)
-{
-}
-
QTextItemInt QTextItemInt::midItem(QFontEngine *fontEngine, int firstGlyphIndex, int numGlyphs) const
{
QTextItemInt ti = *this;
generated by cgit v0.12 at 2024-09-18 21:53:07 (GMT)