bool QSymbianTypeFaceExtras::symbianFontTableApiAvailable()
{
enum FontTableApiAvailability {
Unknown,
Available,
Unavailable
};
static FontTableApiAvailability availability =
QSysInfo::symbianVersion() < QSysInfo::SV_SF_3 ?
Unavailable : Unknown;
if (availability == Unknown) {
// Actually, we should ask CFeatureDiscovery::IsFeatureSupportedL()
// with FfFontTable here. But since at the time of writing, the
// FfFontTable flag check either gave false positives or false
// negatives. Here comes an implicit check via CFont::ExtendedFunction.
QSymbianTGetFontTableParam fontTableParams = {
MAKE_TAG('O', 'S', '/', '2'), 0, 0 };
QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);
CFont *font;
const TInt getFontErr = S60->screenDevice()->GetNearestFontInTwips(font, TFontSpec());
Q_ASSERT(getFontErr == KErrNone);
if (font->ExtendedFunction(QSymbianKFontGetFontTable, &fontTableParams) == KErrNone) {
font->ExtendedFunction(QSymbianKFontReleaseFontTable, &fontTableParams);
availability = Available;
} else {
availability = Unavailable;
}
S60->screenDevice()->ReleaseFont(font);
lock.relock();
}
return availability == Available;
}
