CPLErr VRTDataset::SetMetadata( char **papszMetadata,
const char *pszDomain )
{
SetNeedsFlush();
return GDALDataset::SetMetadata( papszMetadata, pszDomain );
}
CPLErr VRTDataset::SetMetadataItem( const char *pszName,
const char *pszValue,
const char *pszDomain )
{
SetNeedsFlush();
return GDALDataset::SetMetadataItem( pszName, pszValue, pszDomain );
}
CPLErr
VRTWarpedDataset::IBuildOverviews( const char *pszResampling,
int nOverviews, int *panOverviewList,
int nListBands, int *panBandList,
GDALProgressFunc pfnProgress,
void * pProgressData )
{
/* -------------------------------------------------------------------- */
/* Initial progress result. */
/* -------------------------------------------------------------------- */
if( !pfnProgress( 0.0, NULL, pProgressData ) )
{
CPLError( CE_Failure, CPLE_UserInterrupt, "User terminated" );
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* Establish which of the overview levels we already have, and */
/* which are new. */
/* -------------------------------------------------------------------- */
int i, nNewOverviews, *panNewOverviewList = NULL;
nNewOverviews = 0;
panNewOverviewList = (int *) CPLCalloc(sizeof(int),nOverviews);
for( i = 0; i < nOverviews; i++ )
{
int j;
for( j = 0; j < nOverviewCount; j++ )
{
int nOvFactor;
VRTWarpedDataset *poOverview = papoOverviews[j];
nOvFactor = (int)
(0.5+GetRasterXSize() / (double) poOverview->GetRasterXSize());
if( nOvFactor == panOverviewList[i]
|| nOvFactor == GDALOvLevelAdjust( panOverviewList[i],
GetRasterXSize() ) )
panOverviewList[i] *= -1;
}
if( panOverviewList[i] > 0 )
panNewOverviewList[nNewOverviews++] = panOverviewList[i];
}
/* -------------------------------------------------------------------- */
/* Create each missing overview (we don't need to do anything */
/* to update existing overviews). */
/* -------------------------------------------------------------------- */
for( i = 0; i < nNewOverviews; i++ )
{
int nOXSize, nOYSize, iBand;
VWOTInfo *psInfo;
VRTWarpedDataset *poOverviewDS;
/* -------------------------------------------------------------------- */
/* What size should this overview be. */
/* -------------------------------------------------------------------- */
nOXSize = (GetRasterXSize() + panNewOverviewList[i] - 1)
/ panNewOverviewList[i];
nOYSize = (GetRasterYSize() + panNewOverviewList[i] - 1)
/ panNewOverviewList[i];
/* -------------------------------------------------------------------- */
/* Create the overview dataset. */
/* -------------------------------------------------------------------- */
poOverviewDS = new VRTWarpedDataset( nOXSize, nOYSize );
for( iBand = 0; iBand < GetRasterCount(); iBand++ )
{
GDALRasterBand *poOldBand = GetRasterBand(iBand+1);
VRTWarpedRasterBand *poNewBand =
new VRTWarpedRasterBand( poOverviewDS, iBand+1,
poOldBand->GetRasterDataType() );
poNewBand->CopyCommonInfoFrom( poOldBand );
poOverviewDS->SetBand( iBand+1, poNewBand );
}
nOverviewCount++;
papoOverviews = (VRTWarpedDataset **)
CPLRealloc( papoOverviews, sizeof(void*) * nOverviewCount );
papoOverviews[nOverviewCount-1] = poOverviewDS;
/* -------------------------------------------------------------------- */
/* Prepare update transformation information that will apply */
/* the overview decimation. */
/* -------------------------------------------------------------------- */
GDALWarpOptions *psWO = (GDALWarpOptions *) poWarper->GetOptions();
psInfo = (VWOTInfo *) CPLCalloc(sizeof(VWOTInfo),1);
strcpy( psInfo->sTI.szSignature, "GTI" );
psInfo->sTI.pszClassName = "VRTWarpedOverviewTransform";
psInfo->sTI.pfnTransform = VRTWarpedOverviewTransform;
psInfo->sTI.pfnCleanup = VRTWarpedOverviewCleanup;
psInfo->sTI.pfnSerialize = NULL;
psInfo->pfnBaseTransformer = psWO->pfnTransformer;
psInfo->pBaseTransformerArg = psWO->pTransformerArg;
psInfo->dfXOverviewFactor = GetRasterXSize() / (double) nOXSize;
psInfo->dfYOverviewFactor = GetRasterYSize() / (double) nOYSize;
/* -------------------------------------------------------------------- */
/* Initialize the new dataset with adjusted warp options, and */
/* then restore to original condition. */
/* -------------------------------------------------------------------- */
psWO->pfnTransformer = VRTWarpedOverviewTransform;
psWO->pTransformerArg = psInfo;
poOverviewDS->Initialize( psWO );
psWO->pfnTransformer = psInfo->pfnBaseTransformer;
psWO->pTransformerArg = psInfo->pBaseTransformerArg;
}
CPLFree( panNewOverviewList );
/* -------------------------------------------------------------------- */
/* Progress finished. */
/* -------------------------------------------------------------------- */
pfnProgress( 1.0, NULL, pProgressData );
SetNeedsFlush();
return CE_None;
}
