backends/drm: reset cursor texture on compositing reset

When a GPU reset happens, the old texture and vbo become invalid

src/backends/drm/drm_backend.cpp

@@ -364,6 +364,11 @@ void DrmBackend::sceneInitialized()
         for (const auto &gpu : std::as_const(m_gpus)) {
             gpu->recreateSurfaces();
         }
+        for (const auto &output : qAsConst(m_outputs)) {
+            if (DrmOutput *drmOutput = qobject_cast<DrmOutput *>(output)) {
+                drmOutput->resetCursorTexture();
+            }
+        }
     }
 }
 

src/backends/drm/drm_output.cpp

@@ -221,6 +221,11 @@ bool DrmOutput::moveCursor(const QPoint &position)
     return m_moveCursorSuccessful;
 }
 
+void DrmOutput::resetCursorTexture()
+{
+    m_cursor.texture.reset();
+}
+
 QList<std::shared_ptr<OutputMode>> DrmOutput::getModes() const
 {
     const auto drmModes = m_pipeline->connector()->modes();

src/backends/drm/drm_output.h

@@ -52,6 +52,7 @@ public:
 
     bool setCursor(const QImage &image, const QPoint &hotspot) override;
     bool moveCursor(const QPoint &position) override;
+    void resetCursorTexture();
 
     DrmLease *lease() const;
     bool addLeaseObjects(QVector<uint32_t> &objectList);