File indexing completed on 2024-12-22 04:10:29

 /*
  *  SPDX-FileCopyrightText: 2010 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef __KIS_MEMORY_WINDOW_H
 #define __KIS_MEMORY_WINDOW_H
 
 #include <QTemporaryFile>
 
 #include "kis_chunk_allocator.h"
 
 
 #define DEFAULT_WINDOW_SIZE (16*MiB)
 
 class KRITAIMAGE_EXPORT KisMemoryWindow
 {
 public:
     /**
      * @param swapDir If the dir doesn't exist, it'll be created, if it's empty QDir::tempPath will be used.
      * @param writeWindowSize write window size.
      */
     KisMemoryWindow(const QString &swapDir, quint64 writeWindowSize = DEFAULT_WINDOW_SIZE);
     ~KisMemoryWindow();
 
     inline quint8* getReadChunkPtr(KisChunk readChunk) {
         return getReadChunkPtr(readChunk.data());
     }
 
     inline quint8* getWriteChunkPtr(KisChunk writeChunk) {
         return getWriteChunkPtr(writeChunk.data());
     }
 
     quint8* getReadChunkPtr(const KisChunkData &readChunk);
     quint8* getWriteChunkPtr(const KisChunkData &writeChunk);
 
 private:
     struct MappingWindow {
         MappingWindow(quint64 _defaultSize)
             : chunk(0,0),
               window(0),
               defaultSize(_defaultSize)
         {
         }
 
         quint8* calculatePointer(const KisChunkData &other) const {
             return window + other.m_begin - chunk.m_begin;
         }
 
         KisChunkData chunk;
         quint8 *window;
         const quint64 defaultSize;
     };
 
 
 private:
     bool adjustWindow(const KisChunkData &requestedChunk,
                       MappingWindow *adjustingWindow,
                       MappingWindow *otherWindow);
 
 private:
     QTemporaryFile m_file;
 
     bool m_valid;
     MappingWindow m_readWindowEx;
     MappingWindow m_writeWindowEx;
 };
 
 #endif /* __KIS_MEMORY_WINDOW_H */