Compositor: Fix coordinate system inconsistencies

Several properties were using pixel coordinates and surface coordinates without
converting.

[ChangeLog][Compositor] QWaylandSurface::destinationSize has been added which
returns the size of the surface that will be displayed on the screen in surface
coordinates.

[ChangeLog][Compositor] Fixed a bug where QWaylandSurface::inputRegionContains
would return true for some points outside surfaces with buffer scale > 1.

[ChangeLog][Compositor] Fixed a bug which caused ShellSurfaceItems for surfaces
with buffer scale > 1 to move too much when resizing interactively.

It also gets rid of all calls to QWaylandSurface::size, which confusingly
returns the size of the surface's buffer in pixel coordinates. Most properties
now use destionationSize's surface coordinates consistently. Hopefully,
QWaylandSurface::size can be renamed or removed in Qt 6.

Change-Id: I007256a8df7759cf74fbfd51624fa1f90c083336
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/wayland/qwindow-compositor/compositor.h b/examples/wayland/qwindow-compositor/compositor.h
index 2a395a1ab..8f18dc53d 100644
--- a/examples/wayland/qwindow-compositor/compositor.h
+++ b/examples/wayland/qwindow-compositor/compositor.h
@@ -82,7 +82,7 @@ public:
     void setParentView(View *parent) { m_parentView = parent; }
     View *parentView() const { return m_parentView; }
     QPointF parentPosition() const { return m_parentView ? (m_parentView->position() + m_parentView->parentPosition()) : QPointF(); }
-    QSize windowSize() { return m_xdgSurface ? m_xdgSurface->windowGeometry().size() :  surface() ? surface()->size() : m_size; }
+    QSize windowSize() { return m_xdgSurface ? m_xdgSurface->windowGeometry().size() : surface() ? surface()->destinationSize() : m_size; }
     QPoint offset() const { return m_offset; }
 
     qreal animationFactor() const {return m_animationFactor; }