From fd608b6a6b25c32d168f850a13f3059b3dc8357f Mon Sep 17 00:00:00 2001
From: Juha Vuolle <juha.vuolle@qt.io>
Date: Fri, 11 Apr 2025 09:13:30 +0300
Subject: [PATCH] Allow configuring Qt without highdpiscaling on Windows
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When highdpiscaling feature is disabled, a default dummy
QHighDpiScaling class is compiled in. This dummy class missed
the roundScaleFactor() method used by qwindwswindow.cpp, causing
a compilation error.

Pick-to: 6.8
Fixes: QTBUG-135893
Change-Id: I754878b9bbd55f68f07a19618fc275f89f7f839f
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
(cherry picked from commit 581e39b35f5a09640959112779514b3f11bc5c82)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/gui/kernel/qhighdpiscaling_p.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gui/kernel/qhighdpiscaling_p.h b/src/gui/kernel/qhighdpiscaling_p.h
index 4a2f4b7a1a3..ab27b990c21 100644
--- a/src/gui/kernel/qhighdpiscaling_p.h
+++ b/src/gui/kernel/qhighdpiscaling_p.h
@@ -344,6 +344,7 @@ public:
     static inline QPointF mapPositionToGlobal(const QPointF &pos, const QPoint &, const QWindow *) { return pos; }
     static inline QPointF mapPositionFromGlobal(const QPointF &pos, const QPoint &, const QWindow *) { return pos; }
     static inline QDpi logicalDpi(const QScreen *) { return QDpi(-1,-1); }
+    static inline qreal roundScaleFactor(qreal) { return 1.0; }
 };
 
 namespace QHighDpi {