update

client/gui/editor/EditorCanvas.h

@@ -153,7 +153,8 @@ signals:
     void requestMoveCamera(const QString& id, const QPointF& delta);
     void requestCameraViewScaleAdjust(const QString& id, double factor);
     void selectedCameraChanged(bool hasSelection, const QString& id, const QPointF& centerWorld, double viewScale);
-    void requestResolveBlackholeCopy(const QString& entityId, const QPoint& sourceOffsetPx);
+    void requestResolveBlackholeCopy(const QString& entityId, const QRect& targetWorldInBackground,
+                                     const QRect& srcWorldInBackground);
     void entityDragActiveChanged(bool on);
     void selectedEntityPreviewChanged(const QString& id, int depth, const QPointF& originWorld);
     /// 预览模式下点击实体：anchorView 为实体质心在视图中的位置，用于摆放介绍浮层
@@ -269,6 +270,8 @@ private:
     bool m_initialBgLoadFinishedEmitted = false;
     QImage m_bhCopyPatch;   // 黑洞「复制背景」预览：原图子区域
     QPoint m_bhCopyPatchOrigin;
+    /// 与 m_bhCopyPatch 对应的逻辑像素范围（vips 路径可能将 patch 缩小到 maxOutput，与逻辑尺寸不同）
+    QSize m_bhCopyPatchLogicalSize;
     bool m_bhCopyPatchValid = false;
     mutable QPixmap m_bgPixmap;
     mutable bool m_pixmapDirty = true;
@@ -337,6 +340,9 @@ private:
     DragMode m_dragMode = DragMode::None;
     QPointF m_dragStartMouseWorld;
 
+    /// 视口 LOD 下：黑洞「复制背景」预览纹理须覆盖 hole∪source；拖动时按需从磁盘重载。
+    void reloadBlackholeCopyVipsPatchUnionIfNeeded();
+
     QVector<Entity> m_entities;
     QVector<ToolView> m_tools;
     QVector<core::Project::Camera> m_cameraOverlays;