CPLErr
GDALDefaultOverviews::BuildOverviewsSubDataset(
const char * pszPhysicalFile,
const char * pszResampling,
int nOverviews, int * panOverviewList,
int nBands, int * panBandList,
GDALProgressFunc pfnProgress, void * pProgressData)
{
if( osOvrFilename.length() == 0 && nOverviews > 0 )
{
VSIStatBufL sStatBuf;
int iSequence = 0; // Used after for.
for( iSequence = 0; iSequence < 100; iSequence++ )
{
osOvrFilename.Printf( "%s_%d.ovr", pszPhysicalFile, iSequence );
if( VSIStatExL( osOvrFilename, &sStatBuf,
VSI_STAT_EXISTS_FLAG ) != 0 )
{
CPLString osAdjustedOvrFilename;
if( poDS->GetMOFlags() & GMO_PAM_CLASS )
{
osAdjustedOvrFilename.Printf(
":::BASE:::%s_%d.ovr",
CPLGetFilename(pszPhysicalFile),
iSequence );
}
else
{
osAdjustedOvrFilename = osOvrFilename;
}
poDS->SetMetadataItem( "OVERVIEW_FILE",
osAdjustedOvrFilename,
"OVERVIEWS" );
break;
}
}
if( iSequence == 100 )
osOvrFilename = "";
}
return BuildOverviews( NULL, pszResampling, nOverviews, panOverviewList,
nBands, panBandList, pfnProgress, pProgressData );
}
CPLErr VRTWarpedDataset::XMLInit( CPLXMLNode *psTree, const char *pszVRTPath )
{
CPLErr eErr;
/* -------------------------------------------------------------------- */
/* Initialize blocksize before calling sub-init so that the */
/* band initializers can get it from the dataset object when */
/* they are created. */
/* -------------------------------------------------------------------- */
nBlockXSize = atoi(CPLGetXMLValue(psTree,"BlockXSize","512"));
nBlockYSize = atoi(CPLGetXMLValue(psTree,"BlockYSize","128"));
/* -------------------------------------------------------------------- */
/* Initialize all the general VRT stuff. This will even */
/* create the VRTWarpedRasterBands and initialize them. */
/* -------------------------------------------------------------------- */
eErr = VRTDataset::XMLInit( psTree, pszVRTPath );
if( eErr != CE_None )
return eErr;
/* -------------------------------------------------------------------- */
/* Find the GDALWarpOptions XML tree. */
/* -------------------------------------------------------------------- */
CPLXMLNode *psOptionsTree;
psOptionsTree = CPLGetXMLNode( psTree, "GDALWarpOptions" );
if( psOptionsTree == NULL )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Count not find required GDALWarpOptions in XML." );
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* Adjust the SourceDataset in the warp options to take into */
/* account that it is relative to the VRT if appropriate. */
/* -------------------------------------------------------------------- */
int bRelativeToVRT =
atoi(CPLGetXMLValue(psOptionsTree,
"SourceDataset.relativeToVRT", "0" ));
const char *pszRelativePath = CPLGetXMLValue(psOptionsTree,
"SourceDataset", "" );
char *pszAbsolutePath;
if( bRelativeToVRT )
pszAbsolutePath =
CPLStrdup(CPLProjectRelativeFilename( pszVRTPath,
pszRelativePath ) );
else
pszAbsolutePath = CPLStrdup(pszRelativePath);
CPLSetXMLValue( psOptionsTree, "SourceDataset", pszAbsolutePath );
CPLFree( pszAbsolutePath );
/* -------------------------------------------------------------------- */
/* And instantiate the warp options, and corresponding warp */
/* operation. */
/* -------------------------------------------------------------------- */
GDALWarpOptions *psWO;
psWO = GDALDeserializeWarpOptions( psOptionsTree );
if( psWO == NULL )
return CE_Failure;
this->eAccess = GA_Update;
psWO->hDstDS = this;
/* -------------------------------------------------------------------- */
/* Instantiate the warp operation. */
/* -------------------------------------------------------------------- */
poWarper = new GDALWarpOperation();
eErr = poWarper->Initialize( psWO );
if( eErr != CE_None)
{
/* -------------------------------------------------------------------- */
/* We are responsible for cleaning up the transformer outselves. */
/* -------------------------------------------------------------------- */
if( psWO->pTransformerArg != NULL )
GDALDestroyTransformer( psWO->pTransformerArg );
}
GDALDestroyWarpOptions( psWO );
if( eErr != CE_None )
{
delete poWarper;
poWarper = NULL;
}
/* -------------------------------------------------------------------- */
/* Generate overviews, if appropriate. */
/* -------------------------------------------------------------------- */
char **papszTokens = CSLTokenizeString(
CPLGetXMLValue( psTree, "OverviewList", "" ));
int iOverview;
for( iOverview = 0;
papszTokens != NULL && papszTokens[iOverview] != NULL;
iOverview++ )
{
int nOvFactor = atoi(papszTokens[iOverview]);
if (nOvFactor > 0)
BuildOverviews( "NEAREST", 1, &nOvFactor, 0, NULL, NULL, NULL );
else
CPLError(CE_Failure, CPLE_AppDefined,
"Bad value for overview factor : %s", papszTokens[iOverview]);
}
CSLDestroy( papszTokens );
return eErr;
}
