core/surface: fixup a few pointer handling edge cases

src/managers/PointerManager.cpp

@@ -151,6 +151,8 @@ void CPointerManager::setCursorSurface(SP<CWLSurface> surf, const Vector2D& hots
         currentCursorImage.surface = surf;
         currentCursorImage.scale   = surf->resource()->current.scale;
 
+        surf->resource()->map();
+
         currentCursorImage.destroySurface = surf->events.destroy.registerListener([this](std::any data) { resetCursorImage(); });
         currentCursorImage.commitSurface  = surf->resource()->events.commit.registerListener([this](std::any data) {
             damageIfSoftware();
@@ -222,6 +224,8 @@ void CPointerManager::resetCursorImage(bool apply) {
             currentCursorImage.surface->resource()->leave(m);
         }
 
+        currentCursorImage.surface->resource()->unmap();
+
         currentCursorImage.destroySurface.reset();
         currentCursorImage.commitSurface.reset();
         currentCursorImage.surface.reset();

src/protocols/core/Compositor.cpp

@@ -156,6 +156,7 @@ void CWLSurfaceResource::destroy() {
         unmap();
     }
     events.destroy.emit();
+    releaseBuffers(false);
     PROTO::compositor->destroyResource(this);
 }
 
@@ -338,13 +339,18 @@ void CWLSurfaceResource::unmap() {
     // release the buffers.
     // this is necessary for XWayland to function correctly,
     // as it does not unmap via the traditional commit(null buffer) method, but via the X11 protocol.
+    releaseBuffers();
+}
+
+void CWLSurfaceResource::releaseBuffers(bool onlyCurrent) {
     if (current.buffer && !current.buffer->resource->released)
         current.buffer->sendRelease();
-    if (pending.buffer && !pending.buffer->resource->released)
+    if (pending.buffer && !pending.buffer->resource->released && !onlyCurrent)
         pending.buffer->sendRelease();
 
     pending.buffer.reset();
-    current.buffer.reset();
+    if (!onlyCurrent)
+        current.buffer.reset();
 }
 
 void CWLSurfaceResource::error(int code, const std::string& str) {

src/protocols/core/Compositor.hpp

@@ -137,6 +137,7 @@ class CWLSurfaceResource {
     int            stateLocks = 0;
 
     void           destroy();
+    void           releaseBuffers(bool onlyCurrent = true);
     void           commitPendingState();
     void           bfHelper(std::vector<SP<CWLSurfaceResource>> nodes, std::function<void(SP<CWLSurfaceResource>, const Vector2D&, void*)> fn, void* data);
 };