Added a faster subpixel antialiasing material for distance field text.

Based on two texture samples instead of five.
Can be enabled with qmlscene --text-subpixel-antialiasing-lowq

Change-Id: I726f73d812b93aa9ca38ce142d1e97b9a40d200a
Reviewed-on: http://codereview.qt.nokia.com/2861
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Yoann Lopes <yoann.lopes@nokia.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/src/declarative/scenegraph/qsgdistancefieldglyphnode.cpp b/src/declarative/scenegraph/qsgdistancefieldglyphnode.cpp
index c087a09835..beeda1e476 100644
--- a/src/declarative/scenegraph/qsgdistancefieldglyphnode.cpp
+++ b/src/declarative/scenegraph/qsgdistancefieldglyphnode.cpp
@@ -252,10 +252,18 @@ void QSGDistanceFieldGlyphNode::updateMaterial()
     delete m_material;
 
     if (m_style == QSGText::Normal) {
-        if (m_antialiasingMode == SubPixelAntialiasing)
-            m_material = new QSGSubPixelDistanceFieldTextMaterial;
-        else
+        switch (m_antialiasingMode) {
+        case HighQualitySubPixelAntialiasing:
+            m_material = new QSGHiQSubPixelDistanceFieldTextMaterial;
+            break;
+        case LowQualitySubPixelAntialiasing:
+            m_material = new QSGLoQSubPixelDistanceFieldTextMaterial;
+            break;
+        case GrayAntialiasing:
+        default:
             m_material = new QSGDistanceFieldTextMaterial;
+            break;
+        }
     } else {
         QSGDistanceFieldStyledTextMaterial *material;
         if (m_style == QSGText::Outline) {