Add support for shared glyph cache

Use a shared graphics cache to back the distance fields if
it is available.

Change-Id: Id5e6e7a28e38e349d787e66016b2d0faebc791d7
Reviewed-by: Jiang Jiang <jiang.jiang@nokia.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/quick/scenegraph/qsgadaptationlayer_p.h b/src/quick/scenegraph/qsgadaptationlayer_p.h
index 45826deae8..2d82ca30ba 100644
--- a/src/quick/scenegraph/qsgadaptationlayer_p.h
+++ b/src/quick/scenegraph/qsgadaptationlayer_p.h
@@ -110,6 +110,8 @@ public:
         HighQualitySubPixelAntialiasing
     };
 
+    QSGGlyphNode() : m_ownerElement(0) {}
+
     virtual void setGlyphs(const QPointF &position, const QGlyphRun &glyphs) = 0;
     virtual void setColor(const QColor &color) = 0;
     virtual void setStyle(QQuickText::TextStyle style) = 0;
@@ -123,8 +125,12 @@ public:
 
     virtual void update() = 0;
 
+    void setOwnerElement(QQuickItem *ownerElement) { m_ownerElement = ownerElement; }
+    QQuickItem *ownerElement() const { return m_ownerElement; }
+
 protected:
     QRectF m_bounding_rect;
+    QQuickItem *m_ownerElement;
 };
 
 class Q_QUICK_EXPORT QSGDistanceFieldGlyphCache
@@ -185,6 +191,10 @@ public:
     void registerGlyphNode(QSGDistanceFieldGlyphNode *node);
     void unregisterGlyphNode(QSGDistanceFieldGlyphNode *node);
 
+    virtual void registerOwnerElement(QQuickItem *ownerElement);
+    virtual void unregisterOwnerElement(QQuickItem *ownerElement);
+    virtual void processPendingGlyphs();
+
 protected:
     struct GlyphPosition {
         glyph_t glyph;
@@ -204,6 +214,7 @@ protected:
     void updateTexture(GLuint oldTex, GLuint newTex, const QSize &newTexSize);
 
     bool containsGlyph(glyph_t glyph) const;
+    GLuint textureIdForGlyph(glyph_t glyph) const;
 
     QOpenGLContext *ctx;