Qt::HANDLE QFont::handle() const
{
QFontEngine *engine = d->engineForScript( QFontPrivate::defaultScript );
#ifdef QT_CHECK_STATE
Q_ASSERT( engine != 0 );
#endif // QT_CHECK_STATE
return engine->handle();
}
/*!
\overload
Returns the width of the first \a len characters of string \a str.
*/
int QFontMetrics::width( const QString &str, int len ) const
{
if ( len < 0 )
len = str.length();
int ret=0;
QFontEngine *engine = d->engineForScript( QFont::NoScript );
for (int i=0; i<len; i++)
ret += memorymanager->lockGlyphMetrics( engine->handle(), str[i].unicode() )->advance;
return (ret*engine->scale)>>8;
}
int QFontMetrics::width( QChar ch ) const
{
unsigned short uc = ch.unicode();
QFontEngine *engine = d->engineForScript( QFont::NoScript );
if ( uc < QFontEngineData::widthCacheSize &&
d->engineData && d->engineData->widthCache[ uc ] )
return (d->engineData->widthCache[ uc ]*engine->scale)>>8;
if ( ::category( ch ) == QChar::Mark_NonSpacing || qIsZeroWidthChar(ch.unicode()))
return 0;
int width = memorymanager->lockGlyphMetrics( engine->handle(), ch.unicode() )->advance;
if ( ch.unicode() < QFontEngineData::widthCacheSize && width > 0 && width < 0x100 )
d->engineData->widthCache[ ch.unicode() ] = width;
return (width*engine->scale)>>8;
}
int QFontMetrics::rightBearing(QChar ch) const
{
QFontEngine *engine = d->engineForScript( QFont::NoScript );
QGlyphMetrics *metrics = memorymanager->lockGlyphMetrics( engine->handle(), ch.unicode() );
return ((metrics->advance - metrics->width - metrics->bearingx)*engine->scale)>>8;
}
int QFontMetrics::leftBearing(QChar ch) const
{
QFontEngine *engine = d->engineForScript( QFont::NoScript );
return (memorymanager->lockGlyphMetrics( engine->handle(), ch.unicode() )->bearingx*engine->scale)>>8;
}
