Revert "QCommonStyle: paint arrows with anti-aliasing"6.7

This reverts commit 74e8f673b827c57ebf2bf802840c19e4a1ac848b.

Reason for revert: the change as is makes the rendering of arrows in the
styles unpleasantly blurry.

Change-Id: I59ccd7373631a550276465caffb7d3074ff5893c
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
(cherry picked from commit 35309856201dea2f14e53468a3c39a777c062729)
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 3 insertions, 5 deletions

diff --git a/src/widgets/styles/qcommonstyle.cpp b/src/widgets/styles/qcommonstyle.cpp
index 958da27825..e5d5abfa09 100644
--- a/src/widgets/styles/qcommonstyle.cpp
+++ b/src/widgets/styles/qcommonstyle.cpp
@@ -763,10 +763,9 @@ void QCommonStyle::drawPrimitive(PrimitiveElement pe, const QStyleOption *opt, Q
             if (!QPixmapCache::find(pixmapName, &pixmap)) {
                 const qreal border = pixelRatio * (size / 5.);
                 const qreal sqsize = pixelRatio * size;
-                QImage image(sqsize, sqsize, QImage::Format_ARGB32_Premultiplied);
-                image.fill(Qt::transparent);
-                QPainter imagePainter(&image);
-                imagePainter.setRenderHint(QPainter::Antialiasing);
+                pixmap = QPixmap(QSize(size, size));
+                pixmap.fill(Qt::transparent);
+                QPainter imagePainter(&pixmap);
 
                 QPolygonF poly;
                 switch (pe) {
@@ -813,7 +812,6 @@ void QCommonStyle::drawPrimitive(PrimitiveElement pe, const QStyleOption *opt, Q
 
                 imagePainter.drawPolygon(poly);
                 imagePainter.end();
-                pixmap = QPixmap::fromImage(image);
                 pixmap.setDevicePixelRatio(pixelRatio);
                 QPixmapCache::insert(pixmapName, pixmap);
             }