QFontEngine *QBasicFontDatabase::fontEngine(const QFontDef &fontDef, QChar::Script script, void *usrPtr)
{
QFontEngineFT *engine;
FontFile *fontfile = static_cast<FontFile *> (usrPtr);
QFontEngine::FaceId fid;
fid.filename = QFile::encodeName(fontfile->fileName);
fid.index = fontfile->indexValue;
engine = new QFontEngineFT(fontDef);
bool antialias = !(fontDef.styleStrategy & QFont::NoAntialias);
QFontEngineFT::GlyphFormat format = antialias? QFontEngineFT::Format_A8 : QFontEngineFT::Format_Mono;
if (!engine->init(fid,antialias,format)) {
delete engine;
engine = 0;
return engine;
}
if (engine->invalid()) {
delete engine;
engine = 0;
} else if (scriptRequiresOpenType(script)) {
if (!engine->supportsScript(script)) {
delete engine;
engine = 0;
}
}
return engine;
}
QFontEngine *QFontconfigDatabase::fontEngine(const QFontDef &f, QChar::Script script, void *usrPtr)
{
if (!usrPtr)
return 0;
QFontDef fontDef = f;
QFontEngineFT *engine;
FontFile *fontfile = static_cast<FontFile *> (usrPtr);
QFontEngine::FaceId fid;
fid.filename = QFile::encodeName(fontfile->fileName);
fid.index = fontfile->indexValue;
bool antialias = !(fontDef.styleStrategy & QFont::NoAntialias);
engine = new QFontEngineFT(fontDef);
QFontEngineFT::GlyphFormat format;
// try and get the pattern
FcPattern *pattern = FcPatternCreate();
FcValue value;
value.type = FcTypeString;
QByteArray cs = fontDef.family.toUtf8();
value.u.s = (const FcChar8 *)cs.data();
FcPatternAdd(pattern,FC_FAMILY,value,true);
value.u.s = (const FcChar8 *)fid.filename.data();
FcPatternAdd(pattern,FC_FILE,value,true);
value.type = FcTypeInteger;
value.u.i = fid.index;
FcPatternAdd(pattern,FC_INDEX,value,true);
FcResult result;
FcPattern *match = FcFontMatch(0, pattern, &result);
if (match) {
QFontEngineFT::HintStyle default_hint_style;
if (f.hintingPreference != QFont::PreferDefaultHinting) {
switch (f.hintingPreference) {
case QFont::PreferNoHinting:
default_hint_style = QFontEngineFT::HintNone;
break;
case QFont::PreferVerticalHinting:
default_hint_style = QFontEngineFT::HintLight;
break;
case QFont::PreferFullHinting:
default:
default_hint_style = QFontEngineFT::HintFull;
break;
}
} else {
int hint_style = 0;
if (FcPatternGetInteger (match, FC_HINT_STYLE, 0, &hint_style) == FcResultNoMatch)
hint_style = QFontEngineFT::HintFull;
switch (hint_style) {
case FC_HINT_NONE:
default_hint_style = QFontEngineFT::HintNone;
break;
case FC_HINT_SLIGHT:
default_hint_style = QFontEngineFT::HintLight;
break;
case FC_HINT_MEDIUM:
default_hint_style = QFontEngineFT::HintMedium;
break;
default:
default_hint_style = QFontEngineFT::HintFull;
break;
}
}
if (antialias) {
// If antialiasing is not fully disabled, fontconfig may still disable it on a font match basis.
FcBool fc_antialias;
if (FcPatternGetBool(match, FC_ANTIALIAS,0, &fc_antialias) != FcResultMatch)
fc_antialias = true;
antialias = fc_antialias;
}
if (f.hintingPreference == QFont::PreferDefaultHinting) {
const QPlatformServices *services = QGuiApplicationPrivate::platformIntegration()->services();
if (services && (services->desktopEnvironment() == "GNOME" || services->desktopEnvironment() == "UNITY")) {
void *hintStyleResource =
QGuiApplication::platformNativeInterface()->nativeResourceForScreen("hintstyle",
QGuiApplication::primaryScreen());
int hintStyle = int(reinterpret_cast<qintptr>(hintStyleResource));
if (hintStyle > 0)
default_hint_style = QFontEngine::HintStyle(hintStyle - 1);
}
}
engine->setDefaultHintStyle(default_hint_style);
if (antialias) {
QFontEngineFT::SubpixelAntialiasingType subpixelType = QFontEngineFT::Subpixel_None;
int subpixel = FC_RGBA_NONE;
FcPatternGetInteger(match, FC_RGBA, 0, &subpixel);
if (subpixel == FC_RGBA_UNKNOWN)
subpixel = FC_RGBA_NONE;
switch (subpixel) {
case FC_RGBA_NONE: subpixelType = QFontEngineFT::Subpixel_None; break;
case FC_RGBA_RGB: subpixelType = QFontEngineFT::Subpixel_RGB; break;
case FC_RGBA_BGR: subpixelType = QFontEngineFT::Subpixel_BGR; break;
case FC_RGBA_VRGB: subpixelType = QFontEngineFT::Subpixel_VRGB; break;
case FC_RGBA_VBGR: subpixelType = QFontEngineFT::Subpixel_VBGR; break;
default: break;
}
format = subpixelType == QFontEngineFT::Subpixel_None
? QFontEngineFT::Format_A8 : QFontEngineFT::Format_A32;
engine->subpixelType = subpixelType;
} else
format = QFontEngineFT::Format_Mono;
FcPatternDestroy(match);
} else
format = antialias ? QFontEngineFT::Format_A8 : QFontEngineFT::Format_Mono;
FcPatternDestroy(pattern);
if (!engine->init(fid,antialias,format)) {
delete engine;
engine = 0;
return engine;
}
if (engine->invalid()) {
delete engine;
engine = 0;
} else if (!engine->supportsScript(script)) {
qWarning(" OpenType support missing for script %d", int(script));
delete engine;
engine = 0;
}
return engine;
}