OGRFeature *OGRShapeLayer::FetchShape(int iShapeId)
{
OGRFeature *poFeature;
if (m_poFilterGeom != NULL && hSHP != NULL )
{
SHPObject *psShape;
psShape = SHPReadObject( hSHP, iShapeId );
// do not trust degenerate bounds or bounds on null shapes.
if( psShape == NULL || psShape->dfXMin == psShape->dfXMax
|| psShape->dfYMin == psShape->dfYMax
|| psShape->nSHPType == SHPT_NULL )
{
poFeature = SHPReadOGRFeature( hSHP, hDBF, poFeatureDefn,
iShapeId, psShape );
}
else if( m_sFilterEnvelope.MaxX < psShape->dfXMin
|| m_sFilterEnvelope.MaxY < psShape->dfYMin
|| psShape->dfXMax < m_sFilterEnvelope.MinX
|| psShape->dfYMax < m_sFilterEnvelope.MinY )
{
SHPDestroyObject(psShape);
poFeature = NULL;
}
else
{
poFeature = SHPReadOGRFeature( hSHP, hDBF, poFeatureDefn,
iShapeId, psShape );
}
}
else
{
poFeature = SHPReadOGRFeature( hSHP, hDBF, poFeatureDefn,
iShapeId, NULL );
}
return poFeature;
}
OGRFeature *OGRShapeLayer::GetFeature( long nFeatureId )
{
OGRFeature *poFeature = NULL;
poFeature = SHPReadOGRFeature( hSHP, hDBF, poFeatureDefn, nFeatureId, NULL);
if( poFeature != NULL )
{
if( poFeature->GetGeometryRef() != NULL )
poFeature->GetGeometryRef()->assignSpatialReference( poSRS );
m_nFeaturesRead++;
return poFeature;
}
/*
* Reading shape feature failed.
*/
return NULL;
}