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Android: Fix font merging

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Our fallback fonts would contain a minimal list of hardcoded fallback
fonts, which is neither sufficient for displaying all text, nor
portable to different vendors which can supply different font sets.

[ChangeLog][Android] Fixed font merging problem which caused e.g.
missing glyphs for Arabic numerals.

Task-number: QTBUG-37738
Change-Id: Ic971343a1cd5610c79a81f6f6152c637937b5626
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
This commit is contained in:
Eskil Abrahamsen Blomfeldt 2014-03-25 10:08:05 +01:00 committed by The Qt Project
parent d668f1be22
commit 0b87f4f6c9
5 changed files with 25 additions and 8 deletions
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2
src/gui/text/qfontdatabase.cpp
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@ -531,7 +531,7 @@ static const int scriptForWritingSystem[] = {
Q_STATIC_ASSERT(sizeof(scriptForWritingSystem) / sizeof(scriptForWritingSystem[0]) == QFontDatabase::WritingSystemsCount);
int qt_script_for_writing_system(QFontDatabase::WritingSystem writingSystem)
Q_GUI_EXPORT int qt_script_for_writing_system(QFontDatabase::WritingSystem writingSystem)
{
return scriptForWritingSystem[writingSystem];
}

6
src/platformsupport/fontdatabases/basic/qbasicfontdatabase.cpp
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@ -220,7 +220,7 @@ void QBasicFontDatabase::releaseHandle(void *handle)
extern FT_Library qt_getFreetype();
QStringList QBasicFontDatabase::addTTFile(const QByteArray &fontData, const QByteArray &file)
QStringList QBasicFontDatabase::addTTFile(const QByteArray &fontData, const QByteArray &file, QSupportedWritingSystems *supportedWritingSystems)
{
FT_Library library = qt_getFreetype();
@ -259,6 +259,8 @@ QStringList QBasicFontDatabase::addTTFile(const QByteArray &fontData, const QByt
if (cm->encoding == FT_ENCODING_ADOBE_CUSTOM
|| cm->encoding == FT_ENCODING_MS_SYMBOL) {
writingSystems.setSupported(QFontDatabase::Symbol);
if (supportedWritingSystems)
supportedWritingSystems->setSupported(QFontDatabase::Symbol);
break;
}
}
@ -277,6 +279,8 @@ QStringList QBasicFontDatabase::addTTFile(const QByteArray &fontData, const QByt
};
writingSystems = QPlatformFontDatabase::writingSystemsFromTrueTypeBits(unicodeRange, codePageRange);
if (supportedWritingSystems)
*supportedWritingSystems = writingSystems;
if (os2->usWeightClass == 0)
;

2
src/platformsupport/fontdatabases/basic/qbasicfontdatabase_p.h
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@ -64,7 +64,7 @@ public:
QStringList addApplicationFont(const QByteArray &fontData, const QString &fileName);
void releaseHandle(void *handle);
static QStringList addTTFile(const QByteArray &fontData, const QByteArray &file);
static QStringList addTTFile(const QByteArray &fontData, const QByteArray &file, QSupportedWritingSystems *supportedWritingSystems = 0);
static QString fontNameFromTTFile(const QString &filename);
};

20
src/plugins/platforms/android/qandroidplatformfontdatabase.cpp
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@ -60,7 +60,17 @@ void QAndroidPlatformFontDatabase::populateFontDatabase()
QDir dir(fontpath, QLatin1String("*.ttf"));
for (int i = 0; i < int(dir.count()); ++i) {
const QByteArray file = QFile::encodeName(dir.absoluteFilePath(dir[i]));
addTTFile(QByteArray(), file);
QSupportedWritingSystems supportedWritingSystems;
QStringList families = addTTFile(QByteArray(), file, &supportedWritingSystems);
extern int qt_script_for_writing_system(QFontDatabase::WritingSystem writingSystem);
for (int i = 0; i < QFontDatabase::WritingSystemsCount; ++i) {
if (i == QFontDatabase::Any || supportedWritingSystems.supported(QFontDatabase::WritingSystem(i))) {
QChar::Script script = QChar::Script(qt_script_for_writing_system(QFontDatabase::WritingSystem(i)));
m_fallbacks[script] += families;
}
}
}
}
@ -71,9 +81,9 @@ QStringList QAndroidPlatformFontDatabase::fallbacksForFamily(const QString &fami
{
Q_UNUSED(family);
Q_UNUSED(style);
Q_UNUSED(script);
if (styleHint == QFont::Monospace)
return QString(qgetenv("QT_ANDROID_FONTS_MONOSPACE")).split(";");
return QString(qgetenv("QT_ANDROID_FONTS")).split(";");
if (styleHint == QFont::Monospace)
return QString(qgetenv("QT_ANDROID_FONTS_MONOSPACE")).split(";") + m_fallbacks[script];
return QString(qgetenv("QT_ANDROID_FONTS")).split(";") + m_fallbacks[script];
}

3
src/plugins/platforms/android/qandroidplatformfontdatabase.h
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@ -53,6 +53,9 @@ public:
QFont::Style style,
QFont::StyleHint styleHint,
QChar::Script script) const;
private:
QHash<QChar::Script, QStringList> m_fallbacks;
};
#endif // QANDROIDPLATFORMFONTDATABASE_H