diff options
| author | Konstantin Ritt <ritt.ks@gmail.com> | 2012-06-10 18:30:10 +0300 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-06-14 05:22:11 +0200 |
| commit | 09bc8e2cb8238d8dee79a0f22b26efcc05ce6a52 (patch) | |
| tree | 29f832231beca539fd6d03261f8e7c18938827db /src/gui/text/qrawfont.cpp | |
| parent | dd68e93de7eb1c50cc5b5779497e03f491c90373 (diff) | |
QFontMetrics/QRawFont: Optimize SMP code points handling a bit
Calling QString::fromUcs4() for the single UCS-4 -encoded character is quite suboptimal
since the BOM detections and the resulting QString aren't really used;
all we need is to split the UCS-4 code point into the UCS-2 surrogate pair.
Change-Id: Ia5b68312909bf551cf2493d9e2752a7d7d837fb9
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Diffstat (limited to 'src/gui/text/qrawfont.cpp')
| -rw-r--r-- | src/gui/text/qrawfont.cpp | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/src/gui/text/qrawfont.cpp b/src/gui/text/qrawfont.cpp index 3bd4d88872..ae14f1c798 100644 --- a/src/gui/text/qrawfont.cpp +++ b/src/gui/text/qrawfont.cpp @@ -620,17 +620,15 @@ bool QRawFont::supportsCharacter(QChar character) const } /*! + \overload + Returns true if the font has a glyph that corresponds to the UCS-4 encoded character \a ucs4. \sa supportedWritingSystems() */ -bool QRawFont::supportsCharacter(quint32 ucs4) const +bool QRawFont::supportsCharacter(uint ucs4) const { - if (!d->isValid()) - return false; - - QString str = QString::fromUcs4(&ucs4, 1); - return d->fontEngine->canRender(str.constData(), str.size()); + return d->isValid() && d->fontEngine->canRender(ucs4); } // qfontdatabase.cpp |