/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Copyright 2011, Blender Foundation.
 */

#ifndef __COM_SINGLETHREADEDOPERATION_H__
#define __COM_SINGLETHREADEDOPERATION_H__
#include "COM_NodeOperation.h"

class SingleThreadedOperation : public NodeOperation {
 private:
  MemoryBuffer *m_cachedInstance;

 protected:
  inline bool isCached()
  {
    return this->m_cachedInstance != NULL;
  }

 public:
  SingleThreadedOperation();

  /**
   * the inner loop of this program
   */
  void executePixel(float output[4], int x, int y, void *data);

  /**
   * Initialize the execution
   */
  void initExecution();

  /**
   * Deinitialize the execution
   */
  void deinitExecution();

  void *initializeTileData(rcti *rect);

  virtual MemoryBuffer *createMemoryBuffer(rcti *rect) = 0;

  int isSingleThreaded()
  {
    return true;
  }
};
#endif
