Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Project:  Erdas Imagine Driver
       4             :  * Purpose:  Entry point for building overviews, used by non-imagine formats.
       5             :  * Author:   Frank Warmerdam, warmerdam@pobox.com
       6             :  *
       7             :  ******************************************************************************
       8             :  * Copyright (c) 2005, Frank Warmerdam
       9             :  *
      10             :  * Permission is hereby granted, free of charge, to any person obtaining a
      11             :  * copy of this software and associated documentation files (the "Software"),
      12             :  * to deal in the Software without restriction, including without limitation
      13             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      14             :  * and/or sell copies of the Software, and to permit persons to whom the
      15             :  * Software is furnished to do so, subject to the following conditions:
      16             :  *
      17             :  * The above copyright notice and this permission notice shall be included
      18             :  * in all copies or substantial portions of the Software.
      19             :  *
      20             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      21             :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      22             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      23             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      24             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      25             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      26             :  * DEALINGS IN THE SOFTWARE.
      27             :  ****************************************************************************/
      28             : 
      29             : #include "cpl_port.h"
      30             : #include "hfa_p.h"
      31             : 
      32             : #include <cstddef>
      33             : #include <string>
      34             : 
      35             : #include "cpl_conv.h"
      36             : #include "cpl_error.h"
      37             : #include "cpl_progress.h"
      38             : #include "cpl_string.h"
      39             : #include "gdal.h"
      40             : #include "gdal_pam.h"
      41             : #include "gdal_priv.h"
      42             : 
      43           5 : CPLErr HFAAuxBuildOverviews(const char *pszOvrFilename, GDALDataset *poParentDS,
      44             :                             GDALDataset **ppoODS, int nBands,
      45             :                             const int *panBandList, int nNewOverviews,
      46             :                             const int *panNewOverviewList,
      47             :                             const char *pszResampling,
      48             :                             GDALProgressFunc pfnProgress, void *pProgressData,
      49             :                             CSLConstList papszOptions)
      50             : 
      51             : {
      52             :     // If the .aux file doesn't exist yet then create it now.
      53           5 :     if (*ppoODS == nullptr)
      54             :     {
      55           4 :         GDALDataType eDT = GDT_Unknown;
      56             :         // Determine the band datatype, and verify that all bands are the same.
      57           8 :         for (int iBand = 0; iBand < nBands; iBand++)
      58             :         {
      59             :             GDALRasterBand *poBand =
      60           4 :                 poParentDS->GetRasterBand(panBandList[iBand]);
      61             : 
      62           4 :             if (iBand == 0)
      63             :             {
      64           4 :                 eDT = poBand->GetRasterDataType();
      65             :             }
      66             :             else
      67             :             {
      68           0 :                 if (eDT != poBand->GetRasterDataType())
      69             :                 {
      70           0 :                     CPLError(CE_Failure, CPLE_NotSupported,
      71             :                              "HFAAuxBuildOverviews() doesn't support a "
      72             :                              "mixture of band data types.");
      73           0 :                     return CE_Failure;
      74             :                 }
      75             :             }
      76             :         }
      77             : 
      78             :         // Create the HFA (.aux) file.  We create it with
      79             :         // COMPRESSED=YES so that no space will be allocated for the
      80             :         // base band.
      81             :         GDALDriver *poHFADriver =
      82           4 :             static_cast<GDALDriver *>(GDALGetDriverByName("HFA"));
      83           4 :         if (poHFADriver == nullptr)
      84             :         {
      85           0 :             CPLError(CE_Failure, CPLE_AppDefined, "HFA driver is unavailable.");
      86           0 :             return CE_Failure;
      87             :         }
      88             : 
      89           4 :         CPLString osDepFileOpt = "DEPENDENT_FILE=";
      90           4 :         osDepFileOpt += CPLGetFilename(poParentDS->GetDescription());
      91             : 
      92           4 :         const char *const apszOptions[4] = {"COMPRESSED=YES", "AUX=YES",
      93           4 :                                             osDepFileOpt.c_str(), nullptr};
      94             : 
      95           4 :         *ppoODS =
      96           4 :             poHFADriver->Create(pszOvrFilename, poParentDS->GetRasterXSize(),
      97             :                                 poParentDS->GetRasterYSize(),
      98             :                                 poParentDS->GetRasterCount(), eDT, apszOptions);
      99             : 
     100           4 :         if (*ppoODS == nullptr)
     101           0 :             return CE_Failure;
     102             :     }
     103             : 
     104             :     // Create the layers.  We depend on the normal buildoverviews
     105             :     // support for HFA to do this.  But we disable the internal
     106             :     // computation of the imagery for these layers.
     107             :     //
     108             :     // We avoid regenerating the new layers here, because if we did
     109             :     // it would use the base layer from the .aux file as the source
     110             :     // data, and that is fake (all invalid tiles).
     111           5 :     CPLStringList aosOptions(papszOptions);
     112           5 :     aosOptions.SetNameValue("REGENERATE", "NO");
     113             : 
     114           5 :     CPLErr eErr = (*ppoODS)->BuildOverviews(
     115             :         pszResampling, nNewOverviews, panNewOverviewList, nBands, panBandList,
     116           5 :         pfnProgress, pProgressData, aosOptions.List());
     117             : 
     118           5 :     return eErr;
     119             : }