ossimJpegTileSource.h

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//*******************************************************************
//
// License:  MIT
//
// See LICENSE.txt file in the top level directory for more details.
//
// Author:  David Burken
//
// Description:
//
// Contains class declaration for JpegTileSource.
// JpegTileSource is derived from ImageHandler which is derived from
// TileSource.
//*******************************************************************
//  $Id: ossimJpegTileSource.h 22117 2013-01-18 21:04:23Z dburken $

#ifndef ossimJpegTileSource_HEADER
#define ossimJpegTileSource_HEADER

#include <ossim/imaging/ossimImageHandler.h>
#include <ossim/imaging/ossimAppFixedTileCache.h>

class  ossimImageData;

class OSSIM_DLL ossimJpegTileSource : public ossimImageHandler
{
public:

   ossimJpegTileSource();

   ossimJpegTileSource(const ossimKeywordlist& kwl,
                       const char* prefix=0);

   ossimJpegTileSource(const char* jpeg_file);


   virtual ossimString getShortName() const;
   virtual ossimString getLongName()  const;

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

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

   virtual ossim_uint32 getNumberOfInputBands() const;

   virtual ossim_uint32 getNumberOfOutputBands()const;

   virtual ossim_uint32 getNumberOfLines(ossim_uint32 reduced_res_level = 0) const;

   virtual ossim_uint32 getNumberOfSamples(ossim_uint32 reduced_res_level = 0) const;

   virtual ossimIrect getImageRectangle(ossim_uint32 reduced_res_level = 0) const;

   virtual bool saveState(ossimKeywordlist& kwl,
                          const char* prefix=0)const;

   virtual bool loadState(const ossimKeywordlist& kwl,
                          const char* prefix=0);

   virtual ossimScalarType getOutputScalarType() const;

   virtual ossim_uint32    getTileWidth() const;

   virtual ossim_uint32    getTileHeight() const;

   virtual ossim_uint32 getImageTileWidth() const;

   virtual ossim_uint32 getImageTileHeight() const;

   bool isValidRLevel(ossim_uint32 reduced_res_level) const;


   bool isOpen()const;
   bool open(const ossimFilename& jpeg_file);
   virtual void close();

   virtual ossimRefPtr<ossimProperty> getProperty(const ossimString& name)const;
   
   virtual void getPropertyNames(std::vector<ossimString>& propertyNames)const;

   virtual ossimRefPtr<ossimImageGeometry> getImageGeometry();
   
protected:

   virtual ossimRefPtr<ossimImageGeometry> getInternalImageGeometry() const; 
   
   virtual ~ossimJpegTileSource();
    class PrivateData;
   virtual bool open();

   void allocate();
   void destroy();
   void restart();

   void fillTile(const ossimIrect& clip_rect, ossimImageData* tile);

   ossimRefPtr<ossimImageData>  theTile;
   ossimRefPtr<ossimImageData>  theCacheTile;
   ossim_uint8*                 theLineBuffer;
   FILE*                        theFilePtr;
   ossimIrect                   theBufferRect;
   ossimIrect                   theImageRect;
   ossim_uint32                 theNumberOfBands;
   ossimIpt                     theCacheSize;

   PrivateData*                 thePrivateData;

   ossimAppFixedTileCache::ossimAppFixedCacheId theCacheId;

TYPE_DATA
};

#endif