SoShapeScale: Fix SoShapeScale does not take DPI scaling into account

src/Gui/SoDevicePixelRatioElement.cpp

@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+ /****************************************************************************
+  *                                                                          *
+  *   Copyright (c) 2024 Pierre-Louis Boyer <development@ondsel.com>         *
+  *                                                                          *
+  *   This file is part of FreeCAD.                                          *
+  *                                                                          *
+  *   FreeCAD is free software: you can redistribute it and/or modify it     *
+  *   under the terms of the GNU Lesser General Public License as            *
+  *   published by the Free Software Foundation, either version 2.1 of the   *
+  *   License, or (at your option) any later version.                        *
+  *                                                                          *
+  *   FreeCAD is distributed in the hope that it will be useful, but         *
+  *   WITHOUT ANY WARRANTY; without even the implied warranty of             *
+  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU       *
+  *   Lesser General Public License for more details.                        *
+  *                                                                          *
+  *   You should have received a copy of the GNU Lesser General Public       *
+  *   License along with FreeCAD. If not, see                                *
+  *   <https://www.gnu.org/licenses/>.                                       *
+  *                                                                          *
+  ***************************************************************************/
+
+
+#include "PreCompiled.h"
+
+#ifndef _PreComp_
+#include <Inventor/actions/SoGLRenderAction.h>
+# include <Inventor/misc/SoState.h>
+#endif
+
+#include "SoDevicePixelRatioElement.h"
+
+SO_ELEMENT_SOURCE(SoDevicePixelRatioElement);
+
+void SoDevicePixelRatioElement::initClass() {
+    SO_ELEMENT_INIT_CLASS(SoDevicePixelRatioElement, SoFloatElement);
+    // Ensure the element is enabled for GLRenderAction
+    SO_ENABLE(SoGLRenderAction, SoDevicePixelRatioElement);
+}
+
+void SoDevicePixelRatioElement::init(SoState* state) {
+    SoFloatElement::init(state);
+    data = 1.0f; // Default to a device pixel ratio of 1.0
+}
+
+void SoDevicePixelRatioElement::set(SoState* state, float dpr) {
+    SoFloatElement::set(classStackIndex, state, dpr);
+}
+
+float SoDevicePixelRatioElement::get(SoState* state) {
+    return SoFloatElement::get(classStackIndex, state);
+}
+
+SoDevicePixelRatioElement::~SoDevicePixelRatioElement() {}