void tst_QFontMetrics::inFontUcs4()
{
int id = QFontDatabase::addApplicationFont(":/fonts/ucs4font.ttf");
QVERIFY(id >= 0);
QFont font("QtTestUcs4");
{
QFontMetrics fm(font);
QVERIFY(fm.inFontUcs4(0x1D7FF));
}
{
QFontMetricsF fm(font);
QVERIFY(fm.inFontUcs4(0x1D7FF));
}
{
QFontEngine *engine = QFontPrivate::get(font)->engineForScript(QChar::Script_Common);
QGlyphLayout glyphs;
glyphs.numGlyphs = 3;
uint buf[3];
glyphs.glyphs = buf;
QString string;
{
string.append(QChar::highSurrogate(0x1D7FF));
string.append(QChar::lowSurrogate(0x1D7FF));
glyphs.numGlyphs = 3;
glyphs.glyphs[0] = 0;
QVERIFY(engine->stringToCMap(string.constData(), string.size(),
&glyphs, &glyphs.numGlyphs,
QFontEngine::GlyphIndicesOnly));
QCOMPARE(glyphs.numGlyphs, 1);
QCOMPARE(glyphs.glyphs[0], uint(1));
}
{
string.clear();
string.append(QChar::ObjectReplacementCharacter);
glyphs.numGlyphs = 3;
glyphs.glyphs[0] = 0;
QVERIFY(engine->stringToCMap(string.constData(), string.size(),
&glyphs, &glyphs.numGlyphs,
QFontEngine::GlyphIndicesOnly));
QVERIFY(glyphs.glyphs[0] != 1);
}
}
QFontDatabase::removeApplicationFont(id);
}
int QFontMetrics::width( QChar ch ) const
{
unsigned short uc = ch.unicode();
if ( uc < QFontEngineData::widthCacheSize &&
d->engineData && d->engineData->widthCache[ uc ] )
return d->engineData->widthCache[ uc ];
if ( ::category( ch ) == QChar::Mark_NonSpacing || qIsZeroWidthChar(ch.unicode()))
return 0;
QFont::Script script;
SCRIPT_FOR_CHAR( script, ch );
QFontEngine *engine = d->engineForScript( script );
#ifdef QT_CHECK_STATE
Q_ASSERT( engine != 0 );
#endif // QT_CHECK_STATE
glyph_t glyphs[8];
advance_t advances[8];
int nglyphs = 7;
engine->stringToCMap( &ch, 1, glyphs, advances, &nglyphs, FALSE );
// ### can nglyphs != 1 happen at all? Not currently I think
if ( uc < QFontEngineData::widthCacheSize && advances[0] > 0 && advances[0] < 0x100 )
d->engineData->widthCache[ uc ] = advances[0];
return advances[0];
}
int QFontMetrics::charWidth( const QString &str, int pos ) const
{
if ( pos < 0 || pos > (int)str.length() )
return 0;
const QChar &ch = str.unicode()[ pos ];
if ( ch.unicode() < QFontEngineData::widthCacheSize &&
d->engineData && d->engineData->widthCache[ ch.unicode() ] )
return (d->engineData->widthCache[ ch.unicode() ]*d->engineData->engine->scale)>>8;
QFont::Script script;
SCRIPT_FOR_CHAR( script, ch );
int width;
if ( script >= QFont::Arabic && script <= QFont::Khmer ) {
// complex script shaping. Have to do some hard work
int from = QMAX( 0, pos - 8 );
int to = QMIN( (int)str.length(), pos + 8 );
QConstString cstr( str.unicode()+from, to-from);
QTextEngine layout( cstr.string(), d );
layout.itemize( QTextEngine::WidthOnly );
width = layout.width( pos-from, 1 );
} else if ( ::category( ch ) == QChar::Mark_NonSpacing || qIsZeroWidthChar(ch.unicode())) {
width = 0;
} else {
QFontEngine *engine = d->engineForScript( script );
#ifdef QT_CHECK_STATE
Q_ASSERT( engine != 0 );
#endif // QT_CHECK_STATE
glyph_t glyphs[8];
advance_t advances[8];
int nglyphs = 7;
engine->stringToCMap( &ch, 1, glyphs, advances, &nglyphs, FALSE );
width = advances[0];
}
if ( ch.unicode() < QFontEngineData::widthCacheSize && width > 0 && width < 0x100 )
d->engineData->widthCache[ ch.unicode() ] = width;
return width;
}
static HB_Bool hb_stringToGlyphs(HB_Font font, const HB_UChar16 *string, hb_uint32 length, HB_Glyph *glyphs, hb_uint32 *numGlyphs, HB_Bool rightToLeft)
{
QFontEngine *fe = (QFontEngine *)font->userData;
QVarLengthGlyphLayoutArray qglyphs(*numGlyphs);
QTextEngine::ShaperFlags shaperFlags(QTextEngine::GlyphIndicesOnly);
if (rightToLeft)
shaperFlags |= QTextEngine::RightToLeft;
int nGlyphs = *numGlyphs;
bool result = fe->stringToCMap(reinterpret_cast<const QChar *>(string), length, &qglyphs, &nGlyphs, shaperFlags);
*numGlyphs = nGlyphs;
if (!result)
return false;
for (hb_uint32 i = 0; i < *numGlyphs; ++i)
glyphs[i] = qglyphs.glyphs[i];
return true;
}
