Long live QRawFont!

The QGlyphs API was initially attempted with a bastardization of
QFont which was meant to encapsulate a single, physical font
instance (a QFontEngine) where a set of glyph indexes would make
sense. This is not how QFont was intended to be used, and it caused
several issues. At the same time, the requirement for loading a
font from ttf/otf data and be able to access it and use it without
polluting the rest of the process with the font arose. To support
these two APIs we introduce QRawFont, which is an abstraction on
top of a single physical font.

Done-with: Jiang Jiang

1 files changed, 13 insertions, 2 deletions

diff --git a/src/gui/text/qfontengine_ft_p.h b/src/gui/text/qfontengine_ft_p.h
index 451d26e769..887efed843 100644
--- a/src/gui/text/qfontengine_ft_p.h
+++ b/src/gui/text/qfontengine_ft_p.h
@@ -74,6 +74,8 @@
 
 QT_BEGIN_NAMESPACE
 
+class QFontEngineFTRawFont;
+
 /*
  * This struct represents one font file on disk (like Arial.ttf) and is shared between all the font engines
  * that show this font file (at different pixel sizes).
@@ -84,7 +86,8 @@ struct QFreetypeFace
     QFontEngine::Properties properties() const;
     bool getSfntTable(uint tag, uchar *buffer, uint *length) const;
 
-    static QFreetypeFace *getFace(const QFontEngine::FaceId &face_id);
+    static QFreetypeFace *getFace(const QFontEngine::FaceId &face_id,
+                                  const QByteArray &fontData = QByteArray());
     void release(const QFontEngine::FaceId &face_id);
 
     // locks the struct for usage. Any read/write operations require locking.
@@ -119,6 +122,7 @@ struct QFreetypeFace
     static void addBitmapToPath(FT_GlyphSlot slot, const QFixedPoint &point, QPainterPath *path, bool = false);
 
 private:
+    friend class QFontEngineFTRawFont;
     friend class QScopedPointerDeleter<QFreetypeFace>;
     QFreetypeFace() : _lock(QMutex::Recursive) {}
     ~QFreetypeFace() {}
@@ -300,7 +304,10 @@ private:
     QFontEngineFT(const QFontDef &fd);
     virtual ~QFontEngineFT();
 
-    bool init(FaceId faceId, bool antiaalias, GlyphFormat defaultFormat = Format_None);
+    bool init(FaceId faceId, bool antiaalias, GlyphFormat defaultFormat = Format_None,
+              const QByteArray &fontData = QByteArray());
+    bool init(FaceId faceId, bool antialias, GlyphFormat format,
+              QFreetypeFace *freetypeFace);
 
     virtual HB_Error getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints);
 
@@ -312,6 +319,7 @@ private:
     };
 
     void setDefaultHintStyle(HintStyle style);
+    HintStyle defaultHintStyle() const { return default_hint_style; }
 protected:
 
     void freeGlyphSets();
@@ -335,6 +343,9 @@ protected:
     bool embeddedbitmap;
 
 private:
+    friend class QFontEngineFTRawFont;
+
+    QFontEngineFT::Glyph *loadGlyphMetrics(QGlyphSet *set, uint glyph, GlyphFormat format) const;
     int loadFlags(QGlyphSet *set, GlyphFormat format, int flags, bool &hsubpixel, int &vfactor) const;
 
     GlyphFormat defaultFormat;