QtQuick scene graph: fix text native rendering

Only 65536 vertices (65536 / 4 = 16384 characters) can be drawn in one
draw call. This is why QSGDistanceFieldGlyphNode (renderType:
Text.QtRendering) creates subnodes if number of characters exceeds that
limit. QSGDefaultGlyphNode (renderType: Text.NativeRendering) missed
that logic for some reason.

Task-number: QTBUG-58852
Change-Id: I88b3fcdb8e56bc92622d3347cd638634d43df138
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/quick/scenegraph/qsgdefaultglyphnode_p.h b/src/quick/scenegraph/qsgdefaultglyphnode_p.h
index 0eb7a4e4bd..37a89c70b9 100644
--- a/src/quick/scenegraph/qsgdefaultglyphnode_p.h
+++ b/src/quick/scenegraph/qsgdefaultglyphnode_p.h
@@ -59,8 +59,31 @@ QT_BEGIN_NAMESPACE
 class QSGDefaultGlyphNode : public QSGBasicGlyphNode
 {
 public:
+    QSGDefaultGlyphNode();
+    ~QSGDefaultGlyphNode();
     void setMaterialColor(const QColor &color) override;
+    void setGlyphs(const QPointF &position, const QGlyphRun &glyphs) override;
     void update() override;
+    void preprocess() override;
+    void updateGeometry();
+
+private:
+    enum DefaultGlyphNodeType {
+        RootGlyphNode,
+        SubGlyphNode
+    };
+
+    void setGlyphNodeType(DefaultGlyphNodeType type) { m_glyphNodeType = type; }
+
+    DefaultGlyphNodeType m_glyphNodeType;
+    QLinkedList<QSGNode *> m_nodesToDelete;
+
+    struct GlyphInfo {
+        QVector<quint32> indexes;
+        QVector<QPointF> positions;
+    };
+
+    uint m_dirtyGeometry: 1;
 };
 
 QT_END_NAMESPACE