ossimGdalDataset Class Reference

ossimGdalDataset This is a gdal data set that wraps an ossim image handler. More...

#include <ossimGdalDataset.h>

Inheritance diagram for ossimGdalDataset:

Public Member Functions
	ossimGdalDataset ()
	default constructor More...
virtual	~ossimGdalDataset ()
	virtual destructor More...
bool	open (const ossimFilename &file)
	open method. More...
void	setImageHandler (ossimImageHandler *ih)
	Sets theImageHandler. More...
const ossimImageHandler *	getImageHandler () const
ossimImageHandler *	getImageHandler ()
void	initGdalOverviewManager ()
	Calls gdal's oOvManager.Initialize. More...
void	setGdalAcces (GDALAccess access)
	Set the access data member. More...

Static Public Member Functions
static GDALDataset *	Open (GDALOpenInfo *)
	Open for static gdal driver. More...

Private Member Functions
void	init ()
	Initializes this object from the image handler. More...

Private Attributes
ossimRefPtr< ossimImageHandler >	theImageHandler

Friends
class	ossimGdalDatasetRasterBand

Detailed Description

ossimGdalDataset This is a gdal data set that wraps an ossim image handler.

Note

Currently no write implemented.

Definition at line 30 of file ossimGdalDataset.h.

Constructor & Destructor Documentation

ossimGdalDataset()

CPL_C_END ossimGdalDataset::ossimGdalDataset

(

)

default constructor

Definition at line 34 of file ossimGdalDataset.cpp.

   : theImageHandler(0)
{
   if (!poOssimGdalDriver)
   {
      GDALRegister_ossimGdalDataset();
      poDriver     = poOssimGdalDriver;
   }
      
   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "ossimGdalDataset::ossimGdalDataset  entered..."
         << std::endl;
#ifdef OSSIM_ID_ENABLED
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "OSSIM_ID:  "
         << OSSIM_ID
         << std::endl;
#endif       
   }
}

~ossimGdalDataset()

ossimGdalDataset::~ossimGdalDataset ( )

virtual

virtual destructor

Definition at line 57 of file ossimGdalDataset.cpp.

{
   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "ossimGdalDataset::~ossimGdalDataset "
         << "\n"
         << std::endl;
   }

   if (theImageHandler.valid())
      theImageHandler = 0;
}

Member Function Documentation

getImageHandler() [1/2]

const ossimImageHandler * ossimGdalDataset::getImageHandler

(

)

const

Returns

Pointer(const) to the image handler or 0 if not set.

Definition at line 132 of file ossimGdalDataset.cpp.

References ossimRefPtr< T >::get(), and theImageHandler.

Referenced by ossimGdalOverviewBuilder::generateHfaStats(), and ossimGdalOverviewBuilder::getOutputFile().

{
   return theImageHandler.get();
}

getImageHandler() [2/2]

ossimImageHandler * ossimGdalDataset::getImageHandler

(

)

Returns

Pointer(not const) to the image handler or 0 if not set.

Definition at line 137 of file ossimGdalDataset.cpp.

References ossimRefPtr< T >::get(), and theImageHandler.

{
   return theImageHandler.get();
}

init()

void ossimGdalDataset::init ( )

private

Initializes this object from the image handler.

Definition at line 153 of file ossimGdalDataset.cpp.

References ossimImageHandler::getImageRectangle(), ossimImageSource::getNumberOfOutputBands(), ossimIrect::height(), theImageHandler, and ossimIrect::width().

{
   nRasterXSize = theImageHandler->getImageRectangle(0).width();
   nRasterYSize = theImageHandler->getImageRectangle(0).height();
   nBands       = theImageHandler->getNumberOfOutputBands();
   eAccess      = GA_ReadOnly;
   
   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
            << "ossimGdalDataset::init DEBUG:"
            << "\nWidth:  " << nRasterXSize
            << "\nHeight: " << nRasterYSize
            << "\nBands:  " << nBands << std::endl;
   }
   
   for( int iBand = 0; iBand < nBands; ++iBand )
   {
      ossimGdalDatasetRasterBand* rb =
         new ossimGdalDatasetRasterBand( this,
                                         iBand+1,
                                         theImageHandler.get());
      SetBand( iBand+1, rb );
   }
}

initGdalOverviewManager()

void ossimGdalDataset::initGdalOverviewManager

(

)

Calls gdal's oOvManager.Initialize.

This must be called if you are building overviews or the code will fail.

Definition at line 142 of file ossimGdalDataset.cpp.

References ossimString::c_str(), ossimImageHandler::getFilename(), theImageHandler, and ossimRefPtr< T >::valid().

{
   ossimFilename f = theImageHandler->getFilename();
   sDescription = f.c_str();
   
   if (theImageHandler.valid())
   {
      oOvManager.Initialize( this, f.c_str() );
   }
}

open()

bool ossimGdalDataset::open

(

const ossimFilename &

file

)

open method.

Parameters

file	The file to open.

Returns

true on success, false on error.

Definition at line 72 of file ossimGdalDataset.cpp.

References ossimImageHandlerRegistry::instance(), ossimImageHandlerRegistry::open(), theImageHandler, and ossimRefPtr< T >::valid().

Referenced by ossimGdalOverviewBuilder::open().

{
   theImageHandler = ossimImageHandlerRegistry::instance()->open(file);
   
   if ( !theImageHandler.valid() )
   {
      if (traceDebug())
      {
         ossimNotify(ossimNotifyLevel_DEBUG)
            << "ossimGdalDataset::open DEBUG:"
            << "\nCould not open:  " << file.c_str() << std::endl;
      }
      return false;
   }
   
   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "ossimGdalDataset::open DEBUG:"
         << "\nOpened:  " << file.c_str() << std::endl;
   }

   init();
   return true;
}

Open()

GDALDataset * ossimGdalDataset::Open ( GDALOpenInfo *  poOpenInfo )

static

Open for static gdal driver.

Definition at line 99 of file ossimGdalDataset.cpp.

{
   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "ossimGdalDataset::Open  entered..."
         << std::endl;
   }

   ossimFilename f = poOpenInfo->pszFilename;
   GDALDataset* ds = new ossimGdalDataset;
   if ( ((ossimGdalDataset*)ds)->open(f) == true)
   {
      return ds;
   }

   return 0;
}

setGdalAcces()

void ossimGdalDataset::setGdalAcces

(

GDALAccess

access

)

Set the access data member.

Either GA_ReadOnly = 0, or GA_Update = 1

Definition at line 179 of file ossimGdalDataset.cpp.

{
   eAccess = access;
}

setImageHandler()

void ossimGdalDataset::setImageHandler

(

ossimImageHandler *

ih

)

Sets theImageHandler.

Parameters

ih	Pointer to image handler.

Definition at line 119 of file ossimGdalDataset.cpp.

Referenced by ossimGdalOverviewBuilder::setInputSource().

{
   if (traceDebug())
   {
      ossimNotify(ossimNotifyLevel_DEBUG)
         << "ossimGdalDataset::setImageHandler entered..."
         << std::endl;
   }

   theImageHandler = ih;
   init();
}

Friends And Related Function Documentation

ossimGdalDatasetRasterBand

friend class ossimGdalDatasetRasterBand

friend

Definition at line 83 of file ossimGdalDataset.h.

Member Data Documentation

theImageHandler

ossimRefPtr<ossimImageHandler> ossimGdalDataset::theImageHandler

private

Definition at line 85 of file ossimGdalDataset.h.

Referenced by getImageHandler(), init(), initGdalOverviewManager(), and open().

---

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

• ossimGdalDataset.h
• ossimGdalDataset.cpp