ossimImageCacheTileSource.h

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//-----------------------------------------------------------------------
// Copyright (C) 2000 ImageLinks Inc. 
//
// License:  See top level LICENSE.txt file.
//
// Author: Mingjie Su
//
// Description: This class give the capability to access tiles from the
//              input frames.
//
//-----------------------------------------------------------------------
//$Id: ossimImageCacheTileSource.h 2644 2011-05-26 15:20:11Z oscar.kramer $
#ifndef ossimImageCacheTileSource_HEADER
#define ossimImageCacheTileSource_HEADER 1

#include <ossim/imaging/ossimImageCacheBase.h>

class OSSIMDLLEXPORT ossimImageCacheTileSource : public ossimImageCacheBase
{
public:

   ossimImageCacheTileSource();

   virtual ossimString getShortName()const;

   virtual ossimString getLongName()const;

   virtual void close();
   
   virtual bool open();

   virtual ossimRefPtr<ossimImageData> getTile(const  ossimIrect& rect,
                                               ossim_uint32 resLevel = 0);

   virtual bool getTile(ossimImageData* result, ossim_uint32 resLevel=0);

   virtual ossimScalarType getOutputScalarType() const;

   virtual ossim_uint32 getNumberOfInputBands()const;

   virtual ossim_uint32 getNumberOfOutputBands()const;

   virtual double getMinPixelValue(ossim_uint32 band=0)const;
   virtual double getMaxPixelValue(ossim_uint32 band=0)const;
   virtual double getNullPixelValue(ossim_uint32 band=0)const;

protected:
   virtual ~ossimImageCacheTileSource();
   
   void fillTile(const ossimIrect& tileRect,
                 const vector<ossimFrameEntryData>& framesInvolved,
                 ossimImageData* tile);

   bool buildFrameEntryArray(ossimFilename imageFile);
 
   ossimRefPtr<ossimImageData>  m_tile;

   ossimRefPtr<ossimImageHandler>  m_imageHandler;
   double                          m_minPixelValue;
   double                          m_maxPixelValue;
   double                          m_nullPixelValue;
TYPE_DATA
};

#endif /* #ifndef ossimImageCacheTileSource_HEADER */