Support adding application fonts with QFontconfigDatabase

QFontDatabaseQPA should be able to reinitialize database and
reregister all the fonts when an application font is added, because
it will trigger db->invalidate().

Add cloneWithSize support to QFontEngineBox so that even no usable
font is found in QFontDatabase, QRawFont::setPixelSize can still
work (without making the result rawfont invalid).

Register application fonts with QFontconfigDatabase, the code is
adapted from QFontDatabaseX11.

Reenable QRawFont tests for QPA, these usages are now supported in
QPA.

Fix QStaticText tests, raster in QPA does support transformations.
Translate the text before ZAxix rotation so that it will be visible
in canvas.

Add back fixedPitch support to QPA, and fix QFontDatabase tests.

Fix QGlyphRun tests, ignore non-existence glyphs in alphaMap
locking.

Fix QFontMetrics tests.

Task-number: QTBUG-21415, QTBUG-20754, QTBUG-20977,
             QTBUG-20976, QTBUG-20760, QTBUG-20759
Change-Id: I24aea7d6ec6b2ac6342134d1f2591327c23a692b
Reviewed-on: http://codereview.qt-project.org/5384
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

6 files changed, 26 insertions, 11 deletions

diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp
index 233bc04924..99c17435dc 100644
--- a/src/gui/painting/qpaintengine_raster.cpp
+++ b/src/gui/painting/qpaintengine_raster.cpp
@@ -2726,7 +2726,7 @@ bool QRasterPaintEngine::drawCachedGlyphs(int numGlyphs, const glyph_t *glyphs,
             QPoint offset;
             QImage *alphaMap = fontEngine->lockedAlphaMapForGlyph(glyphs[i], spp, neededFormat, s->matrix,
                                                                   &offset);
-            if (alphaMap == 0)
+            if (alphaMap == 0 || alphaMap->isNull())
                 continue;
 
             alphaPenBlt(alphaMap->bits(), alphaMap->bytesPerLine(), alphaMap->depth(),
diff --git a/src/gui/text/qfontdatabase_qpa.cpp b/src/gui/text/qfontdatabase_qpa.cpp
index 3a578e746f..fbee077ba7 100644
--- a/src/gui/text/qfontdatabase_qpa.cpp
+++ b/src/gui/text/qfontdatabase_qpa.cpp
@@ -53,16 +53,18 @@
 QT_BEGIN_NAMESPACE
 
 Q_GUI_EXPORT  void qt_registerFont(const QString &familyName, const QString &foundryname, int weight,
-                                   QFont::Style style, int stretch, bool antialiased, bool scalable, int pixelSize,
+                                   QFont::Style style, int stretch, bool antialiased,
+                                   bool scalable, int pixelSize, bool fixedPitch,
                                    const QSupportedWritingSystems &writingSystems, void *handle)
 {
     QFontDatabasePrivate *d = privateDb();
-    //    qDebug() << "Adding font" << familyname << weight << italic << pixelSize << file << fileIndex << antialiased;
+    //    qDebug() << "Adding font" << familyName << weight << style << pixelSize << antialiased;
         QtFontStyle::Key styleKey;
         styleKey.style = style;
         styleKey.weight = weight;
         styleKey.stretch = stretch;
         QtFontFamily *f = d->family(familyName, true);
+        f->fixedPitch = fixedPitch;
 
         for (int i = 0; i < QFontDatabase::WritingSystemsCount; ++i) {
             if (writingSystems.supported(QFontDatabase::WritingSystem(i))) {
@@ -106,10 +108,12 @@ static QStringList fallbackFamilies(const QString &family, const QFont::Style &s
 static void initializeDb()
 {
     static int initialized = false;
+    QFontDatabasePrivate *db = privateDb();
 
-    if (!initialized) {
+    if (!initialized || db->reregisterAppFonts) {
         //init by asking for the platformfontdb for the first time :)
         QGuiApplicationPrivate::platformIntegration()->fontDatabase()->populateFontDatabase();
+        db->reregisterAppFonts = false;
         initialized = true;
     }
 }
diff --git a/src/gui/text/qfontengine.cpp b/src/gui/text/qfontengine.cpp
index 4f18aa3efd..fabd8c3634 100644
--- a/src/gui/text/qfontengine.cpp
+++ b/src/gui/text/qfontengine.cpp
@@ -1281,7 +1281,11 @@ glyph_metrics_t QFontEngineBox::boundingBox(glyph_t)
     return glyph_metrics_t(0, -_size, _size, _size, _size, 0);
 }
 
-
+QFontEngine *QFontEngineBox::cloneWithSize(qreal pixelSize) const
+{
+    QFontEngineBox *fe = new QFontEngineBox(pixelSize);
+    return fe;
+}
 
 QFixed QFontEngineBox::ascent() const
 {
diff --git a/src/gui/text/qfontengine_p.h b/src/gui/text/qfontengine_p.h
index f74302c054..2bec69c467 100644
--- a/src/gui/text/qfontengine_p.h
+++ b/src/gui/text/qfontengine_p.h
@@ -379,6 +379,7 @@ public:
 
     virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
     virtual glyph_metrics_t boundingBox(glyph_t glyph);
+    virtual QFontEngine *cloneWithSize(qreal pixelSize) const;
 
     virtual QFixed ascent() const;
     virtual QFixed descent() const;
diff --git a/src/gui/text/qplatformfontdatabase_qpa.cpp b/src/gui/text/qplatformfontdatabase_qpa.cpp
index 7ad838561b..cedf481898 100644
--- a/src/gui/text/qplatformfontdatabase_qpa.cpp
+++ b/src/gui/text/qplatformfontdatabase_qpa.cpp
@@ -48,8 +48,9 @@
 QT_BEGIN_NAMESPACE
 
 extern void qt_registerFont(const QString &familyname, const QString &foundryname, int weight,
-                                         QFont::Style style, int stretch, bool antialiased,bool scalable, int pixelSize,
-                                         const QSupportedWritingSystems &writingSystems, void *hanlde);
+                            QFont::Style style, int stretch, bool antialiased,
+                            bool scalable, int pixelSize, bool fixedPitch,
+                            const QSupportedWritingSystems &writingSystems, void *hanlde);
 
 /*!
     \fn void QPlatformFontDatabase::registerQPF2Font(const QByteArray &dataArray, void *handle)
@@ -88,7 +89,7 @@ void QPlatformFontDatabase::registerQPF2Font(const QByteArray &dataArray, void *
                 }
             }
             QFont::Stretch stretch = QFont::Unstretched;
-            registerFont(fontName,QString(),fontWeight,fontStyle,stretch,true,false,pixelSize,writingSystems,handle);
+            registerFont(fontName,QString(),fontWeight,fontStyle,stretch,true,false,pixelSize,false,writingSystems,handle);
         }
     } else {
         qDebug() << "header verification of QPF2 font failed. maybe it is corrupt?";
@@ -122,12 +123,16 @@ void QPlatformFontDatabase::registerQPF2Font(const QByteArray &dataArray, void *
     \sa registerQPF2Font()
 */
 void QPlatformFontDatabase::registerFont(const QString &familyname, const QString &foundryname, QFont::Weight weight,
-                                         QFont::Style style, QFont::Stretch stretch, bool antialiased, bool scalable, int pixelSize,
+                                         QFont::Style style, QFont::Stretch stretch, bool antialiased,
+                                         bool scalable, int pixelSize, bool fixedPitch,
                                          const QSupportedWritingSystems &writingSystems, void *usrPtr)
 {
     if (scalable)
         pixelSize = 0;
-    qt_registerFont(familyname,foundryname,weight,style,stretch,antialiased,scalable,pixelSize,writingSystems,usrPtr);
+
+    qt_registerFont(familyname, foundryname, weight, style,
+                    stretch, antialiased, scalable, pixelSize,
+                    fixedPitch, writingSystems, usrPtr);
 }
 
 class QWritingSystemsPrivate
diff --git a/src/gui/text/qplatformfontdatabase_qpa.h b/src/gui/text/qplatformfontdatabase_qpa.h
index d34d602e43..ad94b108da 100644
--- a/src/gui/text/qplatformfontdatabase_qpa.h
+++ b/src/gui/text/qplatformfontdatabase_qpa.h
@@ -103,7 +103,8 @@ public:
     //callback
     static void registerQPF2Font(const QByteArray &dataArray, void *handle);
     static void registerFont(const QString &familyname, const QString &foundryname, QFont::Weight weight,
-                             QFont::Style style, QFont::Stretch stretch, bool antialiased, bool scalable, int pixelSize,
+                             QFont::Style style, QFont::Stretch stretch, bool antialiased,
+                             bool scalable, int pixelSize, bool fixedPitch,
                              const QSupportedWritingSystems &writingSystems, void *handle);
 };