ossimGpkgReader.h

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//----------------------------------------------------------------------------
//
// File: ossimGpkgReader.h
//
// License:  LGPL
// 
// See LICENSE.txt file in the top level directory for more details.
//
// Description: OSSIM GeoPackage reader (tile source).
//
//----------------------------------------------------------------------------
// $Id$
#ifndef ossimGpkgReader_HEADER
#define ossimGpkgReader_HEADER 1

#include <ossim/imaging/ossimImageHandler.h>
#include <ossim/base/ossimRefPtr.h>
#include "ossimGpkgTileEntry.h"
#include <ossim/imaging/ossimCodecBase.h>

#include <vector>

class ossimGpkgTileRecord;
class ossimImageData;
struct sqlite3;

class ossimGpkgReader : public ossimImageHandler
{
public:

   ossimGpkgReader();

   virtual ~ossimGpkgReader();

   virtual ossimString getShortName() const;

   virtual ossimString getLongName()  const;

   virtual ossimString getClassName()    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 resLevel = 0) const;

   virtual ossim_uint32 getNumberOfSamples(ossim_uint32 resLevel = 0) const;

   virtual ossimIrect getImageRectangle(ossim_uint32 resLevel = 0) const;

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

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

   virtual void setProperty(ossimRefPtr<ossimProperty> property);

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

   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 isOpen()const;

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

   virtual ossim_uint32 getCurrentEntry()const;

   virtual void getEntryList(std::vector<ossim_uint32>& entryList) const;
   
   virtual void getEntryNames(std::vector<ossimString>& entryNames) const;
   
   virtual bool setCurrentEntry(ossim_uint32 entryIdx);

   virtual ossim_uint32 getNumberOfDecimationLevels()const;

   virtual ossimRefPtr<ossimImageGeometry> getImageGeometry();
   
   virtual ossimRefPtr<ossimImageGeometry> getInternalImageGeometry();
   
protected:

   virtual bool open();

private:

   bool initImageParams();

   void allocate();

   void fillTile( ossim_uint32 resLevel,
                  const ossimIrect& tileRect,
                  const ossimIrect& clipRect,
                  ossimImageData* tile );

   ossimRefPtr<ossimImageData> getTile( ossim_uint32 resLevel,
                                        ossimIpt index );

   ossimRefPtr<ossimImageData> uncompressPngTile( const ossimGpkgTileRecord& tile,
                                                  const ossimIpt& tileSize );

   void getTileIndexes( ossim_uint32 resLevel,
                        const ossimIrect& clipRect,
                        std::vector<ossimIpt>& tileIndexes ) const;

   void getTileSize( ossim_uint32 resLevel, ossimIpt& tileSize ) const;

   ossim_uint32 getNumberOfZoomLevels() const;

   void computeGsd( ossimDpt& gsd) const;

   ossimRefPtr<ossimImageHandler> m_ih;
   
   ossimRefPtr<ossimImageData> m_tile;
   ossimRefPtr<ossimImageData> m_cacheTile;
   // std::ifstream               m_str;
   sqlite3*                    m_db;
   ossim_uint32                m_currentEntry;
   ossim_uint32                m_bands;
   ossimScalarType             m_scalar;
   ossim_uint32                m_tileWidth;
   ossim_uint32                m_tileHeight;
   
   std::vector<ossimGpkgTileEntry> m_entries;

   mutable ossimRefPtr<ossimCodecBase> m_jpegCodec;
   mutable ossimRefPtr<ossimCodecBase> m_pngCodec;

TYPE_DATA
};

#endif