Add renderTypeQuality property to Text element

For large scale text, the default distance field size gives
artifacts on certain font features. We already have an environment
variable which overrides this on an application level, but this
will cause all distance fields to be rendered at the high resolution,
whereas you may just want it for one particular text field.

Since this becomes an especially important use case now that we can
embed the text fields in a 3D scene, we add a property which can
be used to tweak the base font size used for generating the
distance fields.

[ChangeLog][QtQuick][Text] Added "renderTypeQuality" property, which
can be used in cases of very large fonts, where Qt's font rasterization
may show some rendering artifacts when using the default quality.

Fixes: QTBUG-84696
Change-Id: Ie4205e82cf441562dcc65a8e432a941a3baeddf3
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/quick/items/qquicktextnode_p.h b/src/quick/items/qquicktextnode_p.h
index 2969ce9dbc..c5b8d74099 100644
--- a/src/quick/items/qquicktextnode_p.h
+++ b/src/quick/items/qquicktextnode_p.h
@@ -108,11 +108,15 @@ public:
     bool useNativeRenderer() const { return m_useNativeRenderer; }
     void setUseNativeRenderer(bool on) { m_useNativeRenderer = on; }
 
+    void setRenderTypeQuality(int renderTypeQuality) { m_renderTypeQuality = renderTypeQuality; }
+    int renderTypeQuality() const { return m_renderTypeQuality; }
+
 private:
     QSGInternalRectangleNode *m_cursorNode;
     QList<QSGTexture *> m_textures;
     QQuickItem *m_ownerElement;
     bool m_useNativeRenderer;
+    int m_renderTypeQuality;
 
     friend class QQuickTextEdit;
     friend class QQuickTextEditPrivate;