C++ (Cpp) GTXDataset::SetDescription Examples

Example #1

File: gtxdataset.cpp Project: ryandavid/rotobox

GDALDataset *GTXDataset::Open( GDALOpenInfo * poOpenInfo )

{
    if( !Identify( poOpenInfo ) )
        return NULL;

/* -------------------------------------------------------------------- */
/*      Create a corresponding GDALDataset.                             */
/* -------------------------------------------------------------------- */
    GTXDataset *poDS = new GTXDataset();

    poDS->eAccess = poOpenInfo->eAccess;

/* -------------------------------------------------------------------- */
/*      Open the file.                                                  */
/* -------------------------------------------------------------------- */
    if( poOpenInfo->eAccess == GA_ReadOnly )
        poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb" );
    else
        poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb+" );

    if( poDS->fpImage == NULL )
    {
        delete poDS;
        return NULL;
    }

/* -------------------------------------------------------------------- */
/*      Read the header.                                                */
/* -------------------------------------------------------------------- */
    poDS->adfGeoTransform[2] = 0.0;
    poDS->adfGeoTransform[4] = 0.0;

    CPL_IGNORE_RET_VAL(VSIFReadL( poDS->adfGeoTransform+3, 8, 1,
                                  poDS->fpImage ));
    CPL_IGNORE_RET_VAL(VSIFReadL( poDS->adfGeoTransform+0, 8, 1,
                                  poDS->fpImage ));
    CPL_IGNORE_RET_VAL(VSIFReadL( poDS->adfGeoTransform+5, 8, 1,
                                  poDS->fpImage ));
    CPL_IGNORE_RET_VAL(VSIFReadL( poDS->adfGeoTransform+1, 8, 1,
                                  poDS->fpImage ));

    CPL_IGNORE_RET_VAL(VSIFReadL( &(poDS->nRasterYSize), 4, 1, poDS->fpImage ));
    CPL_IGNORE_RET_VAL(VSIFReadL( &(poDS->nRasterXSize), 4, 1, poDS->fpImage ));

    CPL_MSBPTR32( &(poDS->nRasterYSize) );
    CPL_MSBPTR32( &(poDS->nRasterXSize) );

    CPL_MSBPTR64( poDS->adfGeoTransform + 0 );
    CPL_MSBPTR64( poDS->adfGeoTransform + 1 );
    CPL_MSBPTR64( poDS->adfGeoTransform + 3 );
    CPL_MSBPTR64( poDS->adfGeoTransform + 5 );

    poDS->adfGeoTransform[3] +=
        poDS->adfGeoTransform[5] * (poDS->nRasterYSize-1);

    poDS->adfGeoTransform[0] -= poDS->adfGeoTransform[1] * 0.5;
    poDS->adfGeoTransform[3] += poDS->adfGeoTransform[5] * 0.5;

    poDS->adfGeoTransform[5] *= -1;

    if (!GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize))
    {
        delete poDS;
        return NULL;
    }

/* -------------------------------------------------------------------- */
/*      Guess the data type. Since October 1, 2009, it should be        */
/*      Float32. Before it was double.                                  */
/* -------------------------------------------------------------------- */
    CPL_IGNORE_RET_VAL(VSIFSeekL(poDS->fpImage, 0, SEEK_END));
    const vsi_l_offset nSize = VSIFTellL(poDS->fpImage);

    GDALDataType eDT = GDT_Float32;
    if( nSize == 40 + 8 * static_cast<vsi_l_offset>(poDS->nRasterXSize) *
        poDS->nRasterYSize )
        eDT = GDT_Float64;
    const int nDTSize = GDALGetDataTypeSizeBytes(eDT);

/* -------------------------------------------------------------------- */
/*      Create band information object.                                 */
/* -------------------------------------------------------------------- */
    RawRasterBand *poBand = new RawRasterBand(
        poDS, 1, poDS->fpImage,
        (poDS->nRasterYSize-1) * poDS->nRasterXSize*nDTSize + 40,
        nDTSize, poDS->nRasterXSize * -nDTSize,
        eDT,
        !CPL_IS_LSB, TRUE, FALSE );
    poBand->SetNoDataValue( -88.8888 );
    poDS->SetBand( 1, poBand );

/* -------------------------------------------------------------------- */
/*      Initialize any PAM information.                                 */
/* -------------------------------------------------------------------- */
    poDS->SetDescription( poOpenInfo->pszFilename );
    poDS->TryLoadXML();

/* -------------------------------------------------------------------- */
/*      Check for overviews.                                            */
/* -------------------------------------------------------------------- */
    poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename );

    return poDS;
}

Example #2

File: gtxdataset.cpp Project: Joe-xXx/gdal

GDALDataset *GTXDataset::Open( GDALOpenInfo * poOpenInfo )

{
    if( !Identify( poOpenInfo ) )
        return NULL;
        
/* -------------------------------------------------------------------- */
/*      Create a corresponding GDALDataset.                             */
/* -------------------------------------------------------------------- */
    GTXDataset 	*poDS;

    poDS = new GTXDataset();

    poDS->eAccess = poOpenInfo->eAccess;

/* -------------------------------------------------------------------- */
/*      Open the file.                                                  */
/* -------------------------------------------------------------------- */
    if( poOpenInfo->eAccess == GA_ReadOnly )
        poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb" );
    else
        poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb+" );

    if( poDS->fpImage == NULL )
    {
        delete poDS;
        return NULL;
    }

/* -------------------------------------------------------------------- */
/*      Read the header.                                                */
/* -------------------------------------------------------------------- */
    poDS->adfGeoTransform[2] = 0.0;
    poDS->adfGeoTransform[4] = 0.0;

    VSIFReadL( poDS->adfGeoTransform+3, 8, 1, poDS->fpImage );
    VSIFReadL( poDS->adfGeoTransform+0, 8, 1, poDS->fpImage );
    VSIFReadL( poDS->adfGeoTransform+5, 8, 1, poDS->fpImage );
    VSIFReadL( poDS->adfGeoTransform+1, 8, 1, poDS->fpImage );

    VSIFReadL( &(poDS->nRasterYSize), 4, 1, poDS->fpImage );
    VSIFReadL( &(poDS->nRasterXSize), 4, 1, poDS->fpImage );

    CPL_MSBPTR32( &(poDS->nRasterYSize) );
    CPL_MSBPTR32( &(poDS->nRasterXSize) );

    CPL_MSBPTR64( poDS->adfGeoTransform + 0 );
    CPL_MSBPTR64( poDS->adfGeoTransform + 1 );
    CPL_MSBPTR64( poDS->adfGeoTransform + 3 );
    CPL_MSBPTR64( poDS->adfGeoTransform + 5 );

    poDS->adfGeoTransform[3] += 
        poDS->adfGeoTransform[5] * (poDS->nRasterYSize-1);

    poDS->adfGeoTransform[0] -= poDS->adfGeoTransform[1] * 0.5;
    poDS->adfGeoTransform[3] += poDS->adfGeoTransform[5] * 0.5;

    poDS->adfGeoTransform[5] *= -1;

    if (!GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize))
    {
        delete poDS;
        return NULL;
    }

/* -------------------------------------------------------------------- */
/*      Create band information object.                                 */
/* -------------------------------------------------------------------- */
    poDS->SetBand( 
        1, new RawRasterBand( poDS, 1, poDS->fpImage, 
                              (poDS->nRasterYSize-1)*poDS->nRasterXSize*4 + 40,
                              4, poDS->nRasterXSize * -4,
                              GDT_Float32,
                              !CPL_IS_LSB, TRUE, FALSE ) );

/* -------------------------------------------------------------------- */
/*      Initialize any PAM information.                                 */
/* -------------------------------------------------------------------- */
    poDS->SetDescription( poOpenInfo->pszFilename );
    poDS->TryLoadXML();

/* -------------------------------------------------------------------- */
/*      Check for overviews.                                            */
/* -------------------------------------------------------------------- */
    poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename );

    return( poDS );
}