Use non-rotated physical size of an output when required

1. In wl_output and kde_output_device_v2 protocols.
This should fix dpi calculation in
KScreen::Generator::bestScaleForOutput() when panel_orientation
is set to rotate a screen by 90 or 270 degrees.

2. When comparing with physical size of libinput device.

3. In calculations with mode sizes which are not rotated.

This change makes Output::physicalSize() return the raw
physical size, which is used in most of cases. It should
be rotated manually if needed.

src/core/output.cpp

@@ -181,7 +181,7 @@ QRectF Output::fractionalGeometry() const
 
 QSize Output::physicalSize() const
 {
-    return orientateSize(m_information.physicalSize);
+    return m_information.physicalSize;
 }
 
 int Output::refreshRate() const

src/core/output.h

@@ -172,7 +172,7 @@ public:
     qreal scale() const;
 
     /**
-     * Returns the physical size of this output, in millimeters.
+     * Returns the non-rotated physical size of this output, in millimeters.
      *
      * Default implementation returns an invalid QSize.
      */
@@ -230,6 +230,7 @@ public:
     };
     Q_ENUM(Transform)
     Transform transform() const;
+    QSize orientateSize(const QSize &size) const;
 
     void applyChanges(const OutputConfiguration &config);
 
@@ -355,8 +356,6 @@ protected:
     void setInformation(const Information &information);
     void setState(const State &state);
 
-    QSize orientateSize(const QSize &size) const;
-
     EffectScreenImpl *m_effectScreen = nullptr;
     State m_state;
     Information m_information;

src/input.cpp

@@ -1019,7 +1019,7 @@ public:
                 }
                 m_lastTouchDownTime = time;
                 auto output = workspace()->outputAt(pos);
-                auto physicalSize = output->physicalSize();
+                auto physicalSize = output->orientateSize(output->physicalSize());
                 if (!physicalSize.isValid()) {
                     physicalSize = QSize(190, 100);
                 }
@@ -1053,8 +1053,9 @@ public:
                 return true;
             }
             auto output = workspace()->outputAt(pos);
-            const float xfactor = output->physicalSize().width() / (float)output->geometry().width();
-            const float yfactor = output->physicalSize().height() / (float)output->geometry().height();
+            const auto physicalSize = output->orientateSize(output->physicalSize());
+            const float xfactor = physicalSize.width() / (float)output->geometry().width();
+            const float yfactor = physicalSize.height() / (float)output->geometry().height();
 
             auto &point = m_touchPoints[id];
             const QPointF dist = pos - point;