ossimAdrgTileSource.h

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//*******************************************************************
//
// License:  MIT
// 
// See LICENSE.txt file in the top level directory for more details.
// 
// Author: Ken Melero
// 
// Description: This class give the capability to access tiles from an
//              ADRG file.
//
//********************************************************************
// $Id: ossimAdrgTileSource.h 17932 2010-08-19 20:34:35Z dburken $

#ifndef ossimAdrgTileSource_HEADER
#define ossimAdrgTileSource_HEADER

#include <fstream>

#include <ossim/imaging/ossimImageHandler.h>

class ossimImageData;
class ossimAdrgHeader;

class OSSIM_DLL ossimAdrgTileSource : public ossimImageHandler
{
public:
   
   enum
   {
      ADRG_TILE_WIDTH  = 128,
      ADRG_TILE_HEIGHT = 128,
      ADRG_TILE_SIZE   = 16384, // 128 * 128,
      BAND_OFFSET      = 16384, // 8 * 2048,
      NUMBER_OF_BANDS  = 3
   };
   
   enum ADRG_COLOR
   {
      RED_BAND    = 0,  // the ADRG rgb value
      GREEN_BAND  = 1,
      BLUE_BAND   = 2
   };
      
   ossimAdrgTileSource();

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

   virtual bool open();

   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 ossimRefPtr<ossimImageGeometry> getImageGeometry();
   
   virtual ossimScalarType getOutputScalarType() const;

   virtual ossim_uint32 getTileWidth() const;

   virtual void close();
   virtual ossim_uint32 getTileHeight() const;

   virtual bool isOpen()const;

   virtual ossim_uint32 getImageTileWidth() const;

   virtual ossim_uint32 getImageTileHeight() const;

   virtual ossimRefPtr<ossimProperty> getProperty(const ossimString& name)const;
   
   virtual void getPropertyNames(std::vector<ossimString>& propertyNames)const;
   
protected:
   virtual ~ossimAdrgTileSource();
   
   void adjustToStartOfTile(ossimIpt& pt) const;
   
   bool fillBuffer(const ossimIrect& tile_rect,
                   const ossimIrect& clip_rect,
                   ossimImageData* tile);
   
   ossimRefPtr<ossimImageData>  m_Tile;
   ossim_uint8*                 m_TileBuffer;
   std::ifstream                m_FileStr;
   ossimAdrgHeader*             m_AdrgHeader;

TYPE_DATA
};

#endif