surface: avoid spam of window surfaces with scale and transform events

fixes #4408

1 files changed, 6 insertions, 1 deletions

diff --git a/src/Window.cpp b/src/Window.cpp
index 73835ccd..818b4089 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -366,7 +366,12 @@ void CWindow::updateSurfaceScaleTransformDetails() {
         m_pWLSurface.wlr(),
         [](wlr_surface* surf, int x, int y, void* data) {
             const auto PMONITOR = g_pCompositor->getMonitorFromID(((CWindow*)data)->m_iMonitorID);
-            g_pCompositor->setPreferredScaleForSurface(surf, PMONITOR ? PMONITOR->scale : 1.f);
+
+            const auto PSURFACE = CWLSurface::surfaceFromWlr(surf);
+            if (PSURFACE && PSURFACE->m_fLastScale == PMONITOR->scale)
+                return;
+
+            g_pCompositor->setPreferredScaleForSurface(surf, PMONITOR->scale);
             g_pCompositor->setPreferredTransformForSurface(surf, PMONITOR->transform);
         },
         this);