QHighDPI: Fix broken scaling of QPoint(F)

For some reason, the overload resolution of the
High DPI scale() functions introduced by
b6ded193ee64ffe67df6d22e7a23aa1ea9e02ec7 chose the
wrong overloads for QPointF and/or QPoint; it fell
back to the generic template intended for qreal,
QSize, etc, ignoring the origin. Remove the
template and spell out all overloads.

Fixes: QTBUG-77255
Change-Id: I5661f16f7326f65156f646f430f5a0c71d5302d2
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 17 insertions, 3 deletions

diff --git a/src/gui/kernel/qhighdpiscaling_p.h b/src/gui/kernel/qhighdpiscaling_p.h
index 3410c1d345..c43641b8c9 100644
--- a/src/gui/kernel/qhighdpiscaling_p.h
+++ b/src/gui/kernel/qhighdpiscaling_p.h
@@ -59,6 +59,7 @@
 #include <QtCore/qloggingcategory.h>
 #include <QtGui/qregion.h>
 #include <QtGui/qscreen.h>
+#include <QtGui/qvector2d.h>
 #include <QtGui/qwindow.h>
 
 QT_BEGIN_NAMESPACE
@@ -117,13 +118,26 @@ private:
 
 namespace QHighDpi {
 
-template <typename T>
-inline T scale(const T &value, qreal scaleFactor, QPoint origin = QPoint(0, 0))
+inline qreal scale(qreal value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0))
 {
-    Q_UNUSED(origin)
     return value * scaleFactor;
 }
 
+inline QSize scale(const QSize &value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0))
+{
+    return value * scaleFactor;
+}
+
+inline QSizeF scale(const QSizeF &value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0))
+{
+    return value * scaleFactor;
+}
+
+inline QVector2D scale(const QVector2D &value, qreal scaleFactor, QPointF /* origin */ = QPointF(0, 0))
+{
+    return value * float(scaleFactor);
+}
+
 inline QPointF scale(const QPointF &pos, qreal scaleFactor, QPointF origin = QPointF(0, 0))
 {
      return (pos - origin) * scaleFactor + origin;