CPLErr VRTSourcedRasterBand::XMLInit( CPLXMLNode * psTree,
const char *pszVRTPath )
{
CPLErr eErr;
eErr = VRTRasterBand::XMLInit( psTree, pszVRTPath );
if( eErr != CE_None )
return eErr;
/* -------------------------------------------------------------------- */
/* Validate a bit. */
/* -------------------------------------------------------------------- */
if( psTree == NULL || psTree->eType != CXT_Element
|| (!EQUAL(psTree->pszValue,"VRTSourcedRasterBand")
&& !EQUAL(psTree->pszValue,"VRTRasterBand")
&& !EQUAL(psTree->pszValue,"VRTDerivedRasterBand")) )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Invalid node passed to VRTSourcedRasterBand::XMLInit()." );
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* Process sources. */
/* -------------------------------------------------------------------- */
CPLXMLNode *psChild;
VRTDriver *poDriver = (VRTDriver *) GDALGetDriverByName( "VRT" );
for( psChild = psTree->psChild;
psChild != NULL && poDriver != NULL;
psChild = psChild->psNext)
{
VRTSource *poSource;
if( psChild->eType != CXT_Element )
continue;
CPLErrorReset();
poSource = poDriver->ParseSource( psChild, pszVRTPath );
if( poSource != NULL )
AddSource( poSource );
else if( CPLGetLastErrorType() != CE_None )
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* Done. */
/* -------------------------------------------------------------------- */
if( nSources == 0 )
CPLDebug( "VRT", "No valid sources found for band in VRT file:\n%s",
pszVRTPath );
return CE_None;
}
CPLErr VRTSourcedRasterBand::SetMetadata( char **papszNewMD, const char *pszDomain )
{
if( pszDomain != NULL
&& (EQUAL(pszDomain,"new_vrt_sources")
|| EQUAL(pszDomain,"vrt_sources")) )
{
VRTDriver *poDriver = (VRTDriver *) GDALGetDriverByName( "VRT" );
CPLErr eErr;
int i;
if( EQUAL(pszDomain,"vrt_sources") )
{
for( int i = 0; i < nSources; i++ )
delete papoSources[i];
CPLFree( papoSources );
papoSources = NULL;
nSources = 0;
}
for( i = 0; i < CSLCount(papszNewMD); i++ )
{
const char *pszXML = CPLParseNameValue( papszNewMD[i], NULL );
CPLXMLNode *psTree = CPLParseXMLString( pszXML );
VRTSource *poSource;
if( psTree == NULL )
return CE_Failure;
poSource = poDriver->ParseSource( psTree, NULL );
CPLDestroyXMLNode( psTree );
if( poSource != NULL )
{
eErr = AddSource( poSource );
if( eErr != CE_None )
return eErr;
}
else
return CE_Failure;
}
return CE_None;
}
else
return VRTRasterBand::SetMetadata( papszNewMD, pszDomain );
}
CPLErr VRTSourcedRasterBand::SetMetadataItem( const char *pszName,
const char *pszValue,
const char *pszDomain )
{
CPLDebug( "VRT", "VRTSourcedRasterBand::SetMetadataItem(%s,%s,%s)\n",
pszName, pszValue, pszDomain );
if( pszDomain != NULL
&& EQUAL(pszDomain,"new_vrt_sources") )
{
VRTDriver *poDriver = (VRTDriver *) GDALGetDriverByName( "VRT" );
CPLXMLNode *psTree = CPLParseXMLString( pszValue );
VRTSource *poSource;
if( psTree == NULL )
return CE_Failure;
poSource = poDriver->ParseSource( psTree, NULL );
CPLDestroyXMLNode( psTree );
if( poSource != NULL )
return AddSource( poSource );
else
return CE_Failure;
}
else if( pszDomain != NULL
&& EQUAL(pszDomain,"vrt_sources") )
{
int iSource;
if (sscanf(pszName, "source_%d", &iSource) != 1 || iSource < 0 ||
iSource >= nSources)
{
CPLError(CE_Failure, CPLE_AppDefined,
"%s metadata item name is not recognized. "
"Should be between source_0 and source_%d",
pszName, nSources - 1);
return CE_Failure;
}
VRTDriver *poDriver = (VRTDriver *) GDALGetDriverByName( "VRT" );
CPLXMLNode *psTree = CPLParseXMLString( pszValue );
VRTSource *poSource;
if( psTree == NULL )
return CE_Failure;
poSource = poDriver->ParseSource( psTree, NULL );
CPLDestroyXMLNode( psTree );
if( poSource != NULL )
{
delete papoSources[iSource];
papoSources[iSource] = poSource;
((VRTDataset *)poDS)->SetNeedsFlush();
return CE_None;
}
else
return CE_Failure;
}
else
return VRTRasterBand::SetMetadataItem( pszName, pszValue, pszDomain );
}
void GDALRegister_VRT()
{
if( GDALGetDriverByName( "VRT" ) != NULL )
return;
VRTDriver *poDriver = new VRTDriver();
poDriver->SetDescription( "VRT" );
poDriver->SetMetadataItem( GDAL_DCAP_RASTER, "YES" );
poDriver->SetMetadataItem( GDAL_DMD_LONGNAME, "Virtual Raster" );
poDriver->SetMetadataItem( GDAL_DMD_EXTENSION, "vrt" );
poDriver->SetMetadataItem( GDAL_DMD_HELPTOPIC, "gdal_vrttut.html" );
poDriver->SetMetadataItem( GDAL_DMD_CREATIONDATATYPES,
"Byte Int16 UInt16 Int32 UInt32 Float32 Float64 "
"CInt16 CInt32 CFloat32 CFloat64" );
poDriver->pfnOpen = VRTDataset::Open;
poDriver->pfnCreateCopy = VRTCreateCopy;
poDriver->pfnCreate = VRTDataset::Create;
poDriver->pfnIdentify = VRTDataset::Identify;
poDriver->pfnDelete = VRTDataset::Delete;
poDriver->SetMetadataItem( GDAL_DMD_OPENOPTIONLIST,
"<OptionList>"
" <on name='ROOT_PATH' type='string' description='Root path to evaluate "
"relative paths inside the VRT. Mainly useful for inlined VRT, or in-memory "
"VRT, where their own directory does not make sense'/>"
"</OptionList>" );
poDriver->SetMetadataItem( GDAL_DCAP_VIRTUALIO, "YES" );
poDriver->AddSourceParser( "SimpleSource", VRTParseCoreSources );
poDriver->AddSourceParser( "ComplexSource", VRTParseCoreSources );
poDriver->AddSourceParser( "AveragedSource", VRTParseCoreSources );
poDriver->AddSourceParser( "KernelFilteredSource", VRTParseFilterSources );
GetGDALDriverManager()->RegisterDriver( poDriver );
}
void GDALRegister_VRT()
{
VRTDriver *poDriver;
if( GDALGetDriverByName( "VRT" ) == NULL )
{
poDriver = new VRTDriver();
poDriver->SetDescription( "VRT" );
poDriver->SetMetadataItem( GDAL_DCAP_RASTER, "YES" );
poDriver->SetMetadataItem( GDAL_DMD_LONGNAME,
"Virtual Raster" );
poDriver->SetMetadataItem( GDAL_DMD_EXTENSION, "vrt" );
poDriver->SetMetadataItem( GDAL_DMD_HELPTOPIC, "gdal_vrttut.html" );
poDriver->SetMetadataItem( GDAL_DMD_CREATIONDATATYPES,
"Byte Int16 UInt16 Int32 UInt32 Float32 Float64 CInt16 CInt32 CFloat32 CFloat64" );
poDriver->pfnOpen = VRTDataset::Open;
poDriver->pfnCreateCopy = VRTCreateCopy;
poDriver->pfnCreate = VRTDataset::Create;
poDriver->pfnIdentify = VRTDataset::Identify;
poDriver->pfnDelete = VRTDataset::Delete;
poDriver->SetMetadataItem( GDAL_DCAP_VIRTUALIO, "YES" );
poDriver->AddSourceParser( "SimpleSource",
VRTParseCoreSources );
poDriver->AddSourceParser( "ComplexSource",
VRTParseCoreSources );
poDriver->AddSourceParser( "AveragedSource",
VRTParseCoreSources );
poDriver->AddSourceParser( "KernelFilteredSource",
VRTParseFilterSources );
GetGDALDriverManager()->RegisterDriver( poDriver );
}
}
