renderer: Allow DS for surfaces with inert subsurfaces (#12133)

2 files changed, 14 insertions, 0 deletions

diff --git a/src/protocols/core/Compositor.cpp b/src/protocols/core/Compositor.cpp
index 06a4587f..ed36b1f9 100644
--- a/src/protocols/core/Compositor.cpp
+++ b/src/protocols/core/Compositor.cpp
@@ -602,6 +602,19 @@ void CWLSurfaceResource::sortSubsurfaces() {
     }
 }
 
+bool CWLSurfaceResource::hasVisibleSubsurface() {
+    for (auto const& subsurface : m_subsurfaces) {
+        if (!subsurface || !subsurface->m_surface)
+            continue;
+
+        const auto& surf = subsurface->m_surface;
+        if (surf->m_current.size.x > 0 && surf->m_current.size.y > 0)
+            return true;
+    }
+
+    return false;
+}
+
 void CWLSurfaceResource::updateCursorShm(CRegion damage) {
     if (damage.empty())
         return;
diff --git a/src/protocols/core/Compositor.hpp b/src/protocols/core/Compositor.hpp
index c024a3eb..0dc03cf4 100644
--- a/src/protocols/core/Compositor.hpp
+++ b/src/protocols/core/Compositor.hpp
@@ -128,6 +128,7 @@ class CWLSurfaceResource {
     void                                   commitState(SSurfaceState& state);
     NColorManagement::SImageDescription    getPreferredImageDescription();
     void                                   sortSubsurfaces();
+    bool                                   hasVisibleSubsurface();
 
     // returns a pair: found surface (null if not found) and surface local coords.
     // localCoords param is relative to 0,0 of this surface