EVOLUTION-MANAGER

Edit File: hfa_overviews.cpp

/******************************************************************************
 *
 * Project:  Erdas Imagine Driver
 * Purpose:  Entry point for building overviews, used by non-imagine formats.
 * Author:   Frank Warmerdam, warmerdam@pobox.com
 *
 ******************************************************************************
 * Copyright (c) 2005, Frank Warmerdam
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/

#include "cpl_port.h"
#include "hfa_p.h"

#include <cstddef>
#include <string>

#include "cpl_conv.h"
#include "cpl_error.h"
#include "cpl_progress.h"
#include "cpl_string.h"
#include "gdal.h"
#include "gdal_pam.h"
#include "gdal_priv.h"

CPL_CVSID("$Id: hfa_overviews.cpp 37899 2017-04-05 15:40:03Z goatbar $");

CPLErr HFAAuxBuildOverviews( const char *pszOvrFilename,
                             GDALDataset *poParentDS,
                             GDALDataset **ppoODS,
                             int nBands, int *panBandList,
                             int nNewOverviews, int *panNewOverviewList,
                             const char *pszResampling,
                             GDALProgressFunc pfnProgress,
                             void *pProgressData )

{
    // If the .aux file doesn't exist yet then create it now.
    if( *ppoODS == NULL )
    {
        GDALDataType eDT = GDT_Unknown;
        // Determine the band datatype, and verify that all bands are the same.
        for( int iBand = 0; iBand < nBands; iBand++ )
        {
            GDALRasterBand *poBand =
                poParentDS->GetRasterBand(panBandList[iBand]);

if( iBand == 0 )
            {
                eDT = poBand->GetRasterDataType();
            }
            else
            {
                if( eDT != poBand->GetRasterDataType() )
                {
                    CPLError(CE_Failure, CPLE_NotSupported,
                             "HFAAuxBuildOverviews() doesn't support a "
                             "mixture of band data types.");
                    return CE_Failure;
                }
            }
        }

// Create the HFA (.aux) file.  We create it with
        // COMPRESSED=YES so that no space will be allocated for the
        // base band.
        GDALDriver *poHFADriver =
            static_cast<GDALDriver *>(GDALGetDriverByName("HFA"));
        if( poHFADriver == NULL )
        {
            CPLError(CE_Failure, CPLE_AppDefined, "HFA driver is unavailable.");
            return CE_Failure;
        }

CPLString osDepFileOpt = "DEPENDENT_FILE=";
        osDepFileOpt += CPLGetFilename(poParentDS->GetDescription());

const char *apszOptions[4] =
            { "COMPRESSED=YES", "AUX=YES", osDepFileOpt.c_str(), NULL };

*ppoODS =
            poHFADriver->Create(pszOvrFilename,
                                poParentDS->GetRasterXSize(),
                                poParentDS->GetRasterYSize(),
                                poParentDS->GetRasterCount(),
                                eDT, const_cast<char **>(apszOptions));

if( *ppoODS == NULL )
            return CE_Failure;
    }

// Create the layers.  We depend on the normal buildoverviews
    // support for HFA to do this.  But we disable the internal
    // computation of the imagery for these layers.
    //
    // We avoid regenerating the new layers here, because if we did
    // it would use the base layer from the .aux file as the source
    // data, and that is fake (all invalid tiles).
    CPLString oAdjustedResampling = "NO_REGEN:";
    oAdjustedResampling += pszResampling;

CPLErr eErr =
        (*ppoODS)->BuildOverviews(oAdjustedResampling,
                                  nNewOverviews, panNewOverviewList,
                                  nBands, panBandList,
                                  pfnProgress, pProgressData);

return eErr;
}