MEMTiledDataset Class Reference

#include <ossimGdalTiledDataset.h>

Inheritance diagram for MEMTiledDataset:

Public Member Functions
	MEMTiledDataset ()
	MEMTiledDataset (ossimImageSourceSequencer *iface)
	~MEMTiledDataset ()
void	setNoDataValueFlag (bool flag)
	DRB - 20081020 If true (default) the no data value will be set to null pixel value. More...
Public Member Functions inherited from ossimListenerManager
	ossimListenerManager ()
virtual	~ossimListenerManager ()
virtual void	fireEvent (ossimEvent &event)
virtual bool	addListener (ossimListener *listener)
virtual bool	removeListener (ossimListener *listener)
virtual bool	findListener (ossimListener *listener)

Static Public Member Functions
static GDALDataset *	Create (const char *pszFilename, int nXSize, int nYSize, int nBands, GDALDataType eType, char **papszParmList)

Private Member Functions
void	create (ossimImageSourceSequencer *iface)

Private Attributes
ossimRefPtr< ossimImageData >	theData
ossimImageSourceSequencer *	theInterface
ossimIpt	theTileSize
ossimIrect	theAreaOfInterest
bool	theJustCreatedFlag
bool	theSetNoDataValueFlag
	DRB - 20081020 If true (default) the no data value will be set to null pixel value. More...

Friends
class	MEMTiledRasterBand

Additional Inherited Members
Protected Member Functions inherited from ossimListenerManager
	ossimListenerManager (const ossimListenerManager &rhs)
Protected Attributes inherited from ossimListenerManager
std::list< ossimListener * >	theListenerList
bool	theEnabledFlag
std::list< ossimListener * >	theDelayedAdd
std::list< ossimListener * >	theDelayedRemove
bool	theFireEventFlag

Detailed Description

Definition at line 26 of file ossimGdalTiledDataset.h.

Constructor & Destructor Documentation

MEMTiledDataset() [1/2]

MEMTiledDataset::MEMTiledDataset

(

)

Definition at line 304 of file ossimGdalTiledDataset.cpp.

   :
   MEMDataset(),
   theData(),
   theInterface(NULL),
   theTileSize(),
   theAreaOfInterest(),
   theJustCreatedFlag(false),
   theSetNoDataValueFlag(true)
{
}

MEMTiledDataset() [2/2]

MEMTiledDataset::MEMTiledDataset

(

ossimImageSourceSequencer *

iface

)

Definition at line 316 of file ossimGdalTiledDataset.cpp.

References create(), and theInterface.

   :
   MEMDataset(),
   theData(),
   theInterface(iface),
   theTileSize(),
   theAreaOfInterest(),
   theJustCreatedFlag(false),
   theSetNoDataValueFlag(true)
{
   create(theInterface);
}

~MEMTiledDataset()

MEMTiledDataset::~MEMTiledDataset

(

)

Definition at line 333 of file ossimGdalTiledDataset.cpp.

{
    FlushCache();
}

Member Function Documentation

create()

void MEMTiledDataset::create ( ossimImageSourceSequencer *  iface )

private

Definition at line 342 of file ossimGdalTiledDataset.cpp.

Referenced by MEMTiledDataset().

{
   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "MEMTiledDataset::create DEBUG: entered..."
         << endl;
   }

   theInterface = iface;
   
   if(theInterface)
   {

      ossimKeywordlist kwl;

      GByte     **papBandData;
      int nBands = theInterface->getNumberOfOutputBands();
      theData = ossimImageDataFactory::instance()->create(NULL, // no owner specified
                                                          theInterface);
      
      GDALDataType gdalType = ossimGdalType().toGdal(theInterface->getOutputScalarType());
      int         nWordSize = GDALGetDataTypeSize(gdalType) / 8;
      int tw = theInterface->getTileWidth();
      int th = theInterface->getTileHeight();
      int band = 0;

      papBandData = (GByte **) CPLCalloc(sizeof(void *),nBands);
      
      for( band = 0; band < nBands; band++ )
      {
         papBandData[band] = (GByte *) VSICalloc( nWordSize, tw * th );
      }
      
      poDriver = poMEMTiledDriver;
      ossimIrect bounds = theInterface->getBoundingRect();

      theTileSize = ossimIpt(theInterface->getTileWidth(),
                             theInterface->getTileHeight());
      
      nRasterXSize = bounds.width();
      nRasterYSize = bounds.height();

      if (traceDebug())
      {
         ossimNotify(ossimNotifyLevel_DEBUG)
            << "DEBUG:"
            << "\nnRasterXSize" << nRasterXSize
            << "\nnRasterYSize" << nRasterYSize
            << endl;
      }

      eAccess      = GA_Update;
      if(theData.valid())
      {
         theData->setWidth(nRasterXSize);
         theData->setHeight(theTileSize.y);
         theData->initialize();
      }

      if (traceDebug())
      {
         ossimNotify(ossimNotifyLevel_DEBUG)
            << "DEBUG:"
            << "\ntheData:  " << *theData.get()
            << endl;
      }


/* -------------------------------------------------------------------- */
/*      Create band information objects.                                */
/* -------------------------------------------------------------------- */

      for( band = 0; band < nBands; band++ )
      {
       
         MEMTiledRasterBand* rasterBand =
            new MEMTiledRasterBand( this,
                                    band+1,
                                    papBandData[band],
                                    gdalType,
                                    0,
                                    0,
                                    TRUE );
         rasterBand->theDataset = this;
         if (theSetNoDataValueFlag)
         {
            rasterBand->SetNoDataValue(theInterface->getNullPixelValue(band));
         }
         SetBand( band+1, 
                  rasterBand);
      }

      theJustCreatedFlag = true;
      CPLFree( papBandData );

      theAreaOfInterest = theInterface->getBoundingRect();
/* -------------------------------------------------------------------- */
/*      Try to return a regular handle on the file.                     */
/* -------------------------------------------------------------------- */
   }

   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "MEMTiledDataset::create DEBUG: exited..."
         << endl;
   }

}

Create()

static GDALDataset* MEMTiledDataset::Create ( const char *  pszFilename, int  nXSize, int  nYSize, int  nBands, GDALDataType  eType, char **  papszParmList  )

static

setNoDataValueFlag()

void MEMTiledDataset::setNoDataValueFlag

(

bool

flag

)

DRB - 20081020 If true (default) the no data value will be set to null pixel value.

The call to rasterBand->SetNoDataValue causes snow with some viewer with some data types. Like J2K. This can disable it.

Parameters

flag	If true the call to rasterBand->SetNoDataValue will be performed. If false it will be bypassed.

Definition at line 453 of file ossimGdalTiledDataset.cpp.

References theSetNoDataValueFlag.

Referenced by ossimGdalWriter::writeBlockFile().

{
   theSetNoDataValueFlag = flag;
}

Friends And Related Function Documentation

MEMTiledRasterBand

friend class MEMTiledRasterBand

friend

Definition at line 30 of file ossimGdalTiledDataset.h.

Member Data Documentation

theAreaOfInterest

ossimIrect MEMTiledDataset::theAreaOfInterest

private

Definition at line 35 of file ossimGdalTiledDataset.h.

theData

ossimRefPtr<ossimImageData> MEMTiledDataset::theData

private

Definition at line 32 of file ossimGdalTiledDataset.h.

Referenced by MEMTiledRasterBand::copyNulls().

theInterface

ossimImageSourceSequencer* MEMTiledDataset::theInterface

private

Definition at line 33 of file ossimGdalTiledDataset.h.

Referenced by MEMTiledDataset().

theJustCreatedFlag

bool MEMTiledDataset::theJustCreatedFlag

private

Definition at line 36 of file ossimGdalTiledDataset.h.

theSetNoDataValueFlag

bool MEMTiledDataset::theSetNoDataValueFlag

private

DRB - 20081020 If true (default) the no data value will be set to null pixel value.

Definition at line 43 of file ossimGdalTiledDataset.h.

Referenced by setNoDataValueFlag().

theTileSize

ossimIpt MEMTiledDataset::theTileSize

private

Definition at line 34 of file ossimGdalTiledDataset.h.

---

The documentation for this class was generated from the following files:

• ossimGdalTiledDataset.h
• ossimGdalTiledDataset.cpp