File indexing completed on 2024-05-12 15:58:09

 /* SPDX-FileCopyrightText: 2009 Dmitry Kazakov <dimula73@gmail.com>
  *
  * SPDX-License-Identifier: LGPL-2.0-or-later
  */
 
 #ifndef __KIS_ASYNC_MERGER_H
 #define __KIS_ASYNC_MERGER_H
 
 #include "kritaimage_export.h"
 #include "kis_types.h"
 
 class QRect;
 class KisBaseRectsWalker;
 
 class KRITAIMAGE_EXPORT KisAsyncMerger
 {
 public:
     void startMerge(KisBaseRectsWalker &walker, bool notifyClones = true);
 
 private:
     inline void resetProjection();
     inline void setupProjection(KisProjectionLeafSP currentLeaf, const QRect& rect, bool useTempProjection);
     inline void writeProjection(KisProjectionLeafSP topmostLeaf, bool useTempProjection, const QRect &rect);
     inline bool compositeWithProjection(KisProjectionLeafSP leaf, const QRect &rect);
     inline void doNotifyClones(KisBaseRectsWalker &walker);
 
 private:
     /**
      * The place where intermediate results of layer's merge
      * are going. It may be equal to m_finalProjection. In
      * this case the projection will be written directly to
      * the original of the parent layer
      */
     KisPaintDeviceSP m_currentProjection;
 
     /**
      * The final destination of every projection of all
      * the layers. It is equal to the original of a parental
      * node.
      * NOTE: This pointer is cached here to avoid
      *       race conditions
      */
     KisPaintDeviceSP m_finalProjection;
 
     /**
      * Creation of the paint device is quite expensive, so we'll just
      * save the pointer to our temporary device here and will get it when
      * needed. This variable must not be used anywhere out of
      * setupProjection()
      */
     KisPaintDeviceSP m_cachedPaintDevice;
 };
 
 
 #endif /* __KIS_ASYNC_MERGER_H */