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, 2 insertions, 2 deletions

diff --git a/src/quick/scenegraph/qsgdefaultrendercontext_p.h b/src/quick/scenegraph/qsgdefaultrendercontext_p.h
index a110172a6f..002513c0e4 100644
--- a/src/quick/scenegraph/qsgdefaultrendercontext_p.h
+++ b/src/quick/scenegraph/qsgdefaultrendercontext_p.h
@@ -110,7 +110,7 @@ public:
     void endNextRhiFrame(QSGRenderer *renderer) override;
 
     void preprocess() override;
-    QSGDistanceFieldGlyphCache *distanceFieldGlyphCache(const QRawFont &font) override;
+    QSGDistanceFieldGlyphCache *distanceFieldGlyphCache(const QRawFont &font, int renderTypeQuality) override;
 
     QSGTexture *createTexture(const QImage &image, uint flags) const override;
     QSGRenderer *createRenderer(QSGRendererInterface::RenderMode renderMode = QSGRendererInterface::RenderMode2D) override;
@@ -144,7 +144,7 @@ public:
     }
 
 protected:
-    static QString fontKey(const QRawFont &font);
+    static QString fontKey(const QRawFont &font, int renderTypeQuality);
 
     InitParams m_initParams;
     QRhi *m_rhi;