void QgsRasterIterator::startRasterRead( int bandNumber, int nCols, int nRows, const QgsRectangle& extent )
{
if ( !mInput )
{
return;
}
mExtent = extent;
//remove any previous part on that band
removePartInfo( bandNumber );
//split raster into small portions if necessary
RasterPartInfo pInfo;
pInfo.nCols = nCols;
pInfo.nRows = nRows;
pInfo.currentCol = 0;
pInfo.currentRow = 0;
pInfo.prj = nullptr;
mRasterPartInfos.insert( bandNumber, pInfo );
}
void QgsRasterIterator::stopRasterRead( int bandNumber )
{
removePartInfo( bandNumber );
}