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gdaldefaultoverviews.cpp
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/******************************************************************************
*
* Project: GDAL Core
* Purpose: Helper code to implement overview and mask support for many
* drivers with no inherent format support.
* Author: Frank Warmerdam, [email protected]
*
******************************************************************************
* Copyright (c) 2000, 2007, Frank Warmerdam
* Copyright (c) 2007-2013, Even Rouault <even dot rouault at spatialys.com>
*
* 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 "cpl_multiproc.h"
#include "gdal_priv.h"
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <set>
#include <string>
#include <vector>
#include "cpl_conv.h"
#include "cpl_error.h"
#include "cpl_progress.h"
#include "cpl_string.h"
#include "cpl_vsi.h"
#include "gdal.h"
CPL_CVSID("$Id$")
//! @cond Doxygen_Suppress
/************************************************************************/
/* GDALDefaultOverviews() */
/************************************************************************/
GDALDefaultOverviews::GDALDefaultOverviews() :
poDS(nullptr),
poODS(nullptr),
bOvrIsAux(false),
bCheckedForMask(false),
bOwnMaskDS(false),
poMaskDS(nullptr),
poBaseDS(nullptr),
bCheckedForOverviews(FALSE),
pszInitName(nullptr),
bInitNameIsOVR(false),
papszInitSiblingFiles(nullptr)
{}
/************************************************************************/
/* ~GDALDefaultOverviews() */
/************************************************************************/
GDALDefaultOverviews::~GDALDefaultOverviews()
{
CPLFree( pszInitName );
CSLDestroy( papszInitSiblingFiles );
CloseDependentDatasets();
}
/************************************************************************/
/* CloseDependentDatasets() */
/************************************************************************/
int GDALDefaultOverviews::CloseDependentDatasets()
{
bool bHasDroppedRef = false;
if( poODS != nullptr )
{
bHasDroppedRef = true;
poODS->FlushCache(true);
GDALClose( poODS );
poODS = nullptr;
}
if( poMaskDS != nullptr )
{
if( bOwnMaskDS )
{
bHasDroppedRef = true;
poMaskDS->FlushCache(true);
GDALClose( poMaskDS );
}
poMaskDS = nullptr;
}
return bHasDroppedRef;
}
/************************************************************************/
/* IsInitialized() */
/* */
/* Returns TRUE if we are initialized. */
/************************************************************************/
int GDALDefaultOverviews::IsInitialized()
{
OverviewScan();
return poDS != nullptr;
}
/************************************************************************/
/* Initialize() */
/************************************************************************/
void GDALDefaultOverviews::Initialize( GDALDataset *poDSIn,
const char * pszBasename,
char **papszSiblingFiles,
int bNameIsOVR )
{
poDS = poDSIn;
/* -------------------------------------------------------------------- */
/* If we were already initialized, destroy the old overview */
/* file handle. */
/* -------------------------------------------------------------------- */
if( poODS != nullptr )
{
GDALClose( poODS );
poODS = nullptr;
CPLDebug(
"GDAL",
"GDALDefaultOverviews::Initialize() called twice - "
"this is odd and perhaps dangerous!" );
}
/* -------------------------------------------------------------------- */
/* Store the initialization information for later use in */
/* OverviewScan() */
/* -------------------------------------------------------------------- */
bCheckedForOverviews = FALSE;
CPLFree( pszInitName );
pszInitName = nullptr;
if( pszBasename != nullptr )
pszInitName = CPLStrdup(pszBasename);
bInitNameIsOVR = CPL_TO_BOOL(bNameIsOVR);
CSLDestroy( papszInitSiblingFiles );
papszInitSiblingFiles = nullptr;
if( papszSiblingFiles != nullptr )
papszInitSiblingFiles = CSLDuplicate(papszSiblingFiles);
}
/************************************************************************/
/* TransferSiblingFiles() */
/* */
/* Contrary to Initialize(), this sets papszInitSiblingFiles but */
/* without duplicating the passed list. Which must be */
/* "de-allocatable" with CSLDestroy() */
/************************************************************************/
void GDALDefaultOverviews::TransferSiblingFiles( char** papszSiblingFiles )
{
CSLDestroy( papszInitSiblingFiles );
papszInitSiblingFiles = papszSiblingFiles;
}
namespace {
// Prevent infinite recursion.
struct AntiRecursionStruct
{
int nRecLevel = 0;
std::set<CPLString> oSetFiles{};
};
}
static void FreeAntiRecursion( void* pData )
{
delete static_cast<AntiRecursionStruct*>(pData);
}
static AntiRecursionStruct& GetAntiRecursion()
{
static AntiRecursionStruct dummy;
int bMemoryErrorOccurred = false;
void* pData = CPLGetTLSEx(CTLS_GDALDEFAULTOVR_ANTIREC, &bMemoryErrorOccurred);
if( bMemoryErrorOccurred )
{
return dummy;
}
if( pData == nullptr)
{
auto pAntiRecursion = new AntiRecursionStruct();
CPLSetTLSWithFreeFuncEx( CTLS_GDALDEFAULTOVR_ANTIREC,
pAntiRecursion,
FreeAntiRecursion, &bMemoryErrorOccurred );
if( bMemoryErrorOccurred )
{
delete pAntiRecursion;
return dummy;
}
return *pAntiRecursion;
}
return *static_cast<AntiRecursionStruct*>(pData);
}
/************************************************************************/
/* OverviewScan() */
/* */
/* This is called to scan for overview files when a first */
/* request is made with regard to overviews. It uses the */
/* pszInitName, bInitNameIsOVR and papszInitSiblingFiles */
/* information that was stored at Initialization() time. */
/************************************************************************/
void GDALDefaultOverviews::OverviewScan()
{
if( bCheckedForOverviews || poDS == nullptr )
return;
bCheckedForOverviews = true;
if( pszInitName == nullptr )
pszInitName = CPLStrdup(poDS->GetDescription());
AntiRecursionStruct& antiRec = GetAntiRecursion();
// 32 should be enough to handle a .ovr.ovr.ovr...
if( antiRec.nRecLevel == 32 )
return;
if( antiRec.oSetFiles.find(pszInitName) != antiRec.oSetFiles.end() )
return;
antiRec.oSetFiles.insert(pszInitName);
++antiRec.nRecLevel;
CPLDebug( "GDAL", "GDALDefaultOverviews::OverviewScan()" );
/* -------------------------------------------------------------------- */
/* Open overview dataset if it exists. */
/* -------------------------------------------------------------------- */
if( !EQUAL(pszInitName,":::VIRTUAL:::") &&
GDALCanFileAcceptSidecarFile(pszInitName) )
{
if( bInitNameIsOVR )
osOvrFilename = pszInitName;
else
osOvrFilename.Printf( "%s.ovr", pszInitName );
std::vector<char> achOvrFilename;
achOvrFilename.resize(osOvrFilename.size() + 1);
memcpy(&(achOvrFilename[0]),
osOvrFilename.c_str(),
osOvrFilename.size() + 1);
bool bExists = CPL_TO_BOOL(
CPLCheckForFile( &achOvrFilename[0], papszInitSiblingFiles ) );
osOvrFilename = &achOvrFilename[0];
#if !defined(WIN32)
if( !bInitNameIsOVR && !bExists && !papszInitSiblingFiles )
{
osOvrFilename.Printf( "%s.OVR", pszInitName );
memcpy(&(achOvrFilename[0]),
osOvrFilename.c_str(),
osOvrFilename.size() + 1);
bExists = CPL_TO_BOOL(
CPLCheckForFile( &achOvrFilename[0], papszInitSiblingFiles ) );
osOvrFilename = &achOvrFilename[0];
if( !bExists )
osOvrFilename.Printf( "%s.ovr", pszInitName );
}
#endif
if( bExists )
{
poODS = GDALDataset::Open(
osOvrFilename,
GDAL_OF_RASTER |
(poDS->GetAccess() == GA_Update ? GDAL_OF_UPDATE : 0),
nullptr, nullptr, papszInitSiblingFiles );
}
}
/* -------------------------------------------------------------------- */
/* We didn't find that, so try and find a corresponding aux */
/* file. Check that we are the dependent file of the aux */
/* file. */
/* */
/* We only use the .aux file for overviews if they already have */
/* overviews existing, or if USE_RRD is set true. */
/* -------------------------------------------------------------------- */
if( !poODS && !EQUAL(pszInitName,":::VIRTUAL:::") &&
GDALCanFileAcceptSidecarFile(pszInitName) )
{
bool bTryFindAssociatedAuxFile = true;
if( papszInitSiblingFiles )
{
CPLString osAuxFilename = CPLResetExtension( pszInitName, "aux");
int iSibling = CSLFindString( papszInitSiblingFiles,
CPLGetFilename(osAuxFilename) );
if( iSibling < 0 )
{
osAuxFilename = pszInitName;
osAuxFilename += ".aux";
iSibling = CSLFindString( papszInitSiblingFiles,
CPLGetFilename(osAuxFilename) );
if( iSibling < 0 )
bTryFindAssociatedAuxFile = false;
}
}
if( bTryFindAssociatedAuxFile )
{
poODS = GDALFindAssociatedAuxFile( pszInitName, poDS->GetAccess(),
poDS );
}
if( poODS )
{
const bool bUseRRD = CPLTestBool(CPLGetConfigOption("USE_RRD","NO"));
bOvrIsAux = true;
if( GetOverviewCount(1) == 0 && !bUseRRD )
{
bOvrIsAux = false;
GDALClose( poODS );
poODS = nullptr;
}
else
{
osOvrFilename = poODS->GetDescription();
}
}
}
/* -------------------------------------------------------------------- */
/* If we still don't have an overview, check to see if we have */
/* overview metadata referencing a remote (i.e. proxy) or local */
/* subdataset overview dataset. */
/* -------------------------------------------------------------------- */
if( poODS == nullptr )
{
const char *pszProxyOvrFilename =
poDS->GetMetadataItem( "OVERVIEW_FILE", "OVERVIEWS" );
if( pszProxyOvrFilename != nullptr )
{
if( STARTS_WITH_CI(pszProxyOvrFilename, ":::BASE:::") )
{
const CPLString osPath = CPLGetPath(poDS->GetDescription());
osOvrFilename =
CPLFormFilename( osPath, pszProxyOvrFilename+10, nullptr );
}
else
{
osOvrFilename = pszProxyOvrFilename;
}
CPLPushErrorHandler(CPLQuietErrorHandler);
poODS = GDALDataset::Open(osOvrFilename,
GDAL_OF_RASTER | (poDS->GetAccess() == GA_Update ? GDAL_OF_UPDATE: 0));
CPLPopErrorHandler();
}
}
/* -------------------------------------------------------------------- */
/* If we have an overview dataset, then mark all the overviews */
/* with the base dataset Used later for finding overviews */
/* masks. Uggg. */
/* -------------------------------------------------------------------- */
if( poODS )
{
const int nOverviewCount = GetOverviewCount(1);
for( int iOver = 0; iOver < nOverviewCount; iOver++ )
{
GDALRasterBand * const poBand = GetOverview( 1, iOver );
GDALDataset * const poOverDS = poBand != nullptr ?
poBand->GetDataset() : nullptr;
if( poOverDS != nullptr )
{
poOverDS->oOvManager.poBaseDS = poDS;
poOverDS->oOvManager.poDS = poOverDS;
}
}
}
// Undo anti recursion protection
antiRec.oSetFiles.erase(pszInitName);
--antiRec.nRecLevel;
}
/************************************************************************/
/* GetOverviewCount() */
/************************************************************************/
int GDALDefaultOverviews::GetOverviewCount( int nBand )
{
if( poODS == nullptr || nBand < 1 || nBand > poODS->GetRasterCount() )
return 0;
GDALRasterBand * poBand = poODS->GetRasterBand( nBand );
if( poBand == nullptr )
return 0;
if( bOvrIsAux )
return poBand->GetOverviewCount();
return poBand->GetOverviewCount() + 1;
}
/************************************************************************/
/* GetOverview() */
/************************************************************************/
GDALRasterBand *
GDALDefaultOverviews::GetOverview( int nBand, int iOverview )
{
if( poODS == nullptr || nBand < 1 || nBand > poODS->GetRasterCount() )
return nullptr;
GDALRasterBand * const poBand = poODS->GetRasterBand( nBand );
if( poBand == nullptr )
return nullptr;
if( bOvrIsAux )
return poBand->GetOverview( iOverview );
// TIFF case, base is overview 0.
if( iOverview == 0 )
return poBand;
if( iOverview-1 >= poBand->GetOverviewCount() )
return nullptr;
return poBand->GetOverview( iOverview-1 );
}
/************************************************************************/
/* GDALOvLevelAdjust() */
/* */
/* Some overview levels cannot be achieved closely enough to be */
/* recognised as the desired overview level. This function */
/* will adjust an overview level to one that is achievable on */
/* the given raster size. */
/* */
/* For instance a 1200x1200 image on which a 256 level overview */
/* is request will end up generating a 5x5 overview. However, */
/* this will appear to the system be a level 240 overview. */
/* This function will adjust 256 to 240 based on knowledge of */
/* the image size. */
/************************************************************************/
int GDALOvLevelAdjust( int nOvLevel, int nXSize )
{
int nOXSize = (nXSize + nOvLevel - 1) / nOvLevel;
return static_cast<int>(0.5 + nXSize / static_cast<double>(nOXSize));
}
int GDALOvLevelAdjust2( int nOvLevel, int nXSize, int nYSize )
{
// Select the larger dimension to have increased accuracy, but
// with a slight preference to x even if (a bit) smaller than y
// in an attempt to behave closer as previous behavior.
if( nXSize >= nYSize / 2 && !(nXSize < nYSize && nXSize < nOvLevel) )
{
const int nOXSize = (nXSize + nOvLevel - 1) / nOvLevel;
return static_cast<int>(0.5 + nXSize / static_cast<double>(nOXSize));
}
const int nOYSize = (nYSize + nOvLevel - 1) / nOvLevel;
return static_cast<int>(0.5 + nYSize / static_cast<double>(nOYSize));
}
/************************************************************************/
/* GDALComputeOvFactor() */
/************************************************************************/
int GDALComputeOvFactor( int nOvrXSize, int nRasterXSize,
int nOvrYSize, int nRasterYSize )
{
// Select the larger dimension to have increased accuracy, but
// with a slight preference to x even if (a bit) smaller than y
// in an attempt to behave closer as previous behavior.
if( nRasterXSize >= nRasterYSize / 2 )
{
return static_cast<int>(0.5 + nRasterXSize / static_cast<double>(nOvrXSize));
}
return static_cast<int>(0.5 + nRasterYSize / static_cast<double>(nOvrYSize));
}
/************************************************************************/
/* CleanOverviews() */
/* */
/* Remove all existing overviews. */
/************************************************************************/
CPLErr GDALDefaultOverviews::CleanOverviews()
{
// Anything to do?
if( poODS == nullptr )
return CE_None;
// Delete the overview file(s).
GDALDriver *poOvrDriver = poODS->GetDriver();
GDALClose( poODS );
poODS = nullptr;
const CPLErr eErr = poOvrDriver != nullptr ?
poOvrDriver->Delete( osOvrFilename ) : CE_None;
// Reset the saved overview filename.
if( !EQUAL(poDS->GetDescription(),":::VIRTUAL:::") )
{
const bool bUseRRD = CPLTestBool(CPLGetConfigOption("USE_RRD","NO"));
if( bUseRRD )
osOvrFilename = CPLResetExtension( poDS->GetDescription(), "aux" );
else
osOvrFilename.Printf( "%s.ovr", poDS->GetDescription() );
}
else
{
osOvrFilename = "";
}
return eErr;
}
/************************************************************************/
/* BuildOverviewsSubDataset() */
/************************************************************************/
CPLErr
GDALDefaultOverviews::BuildOverviewsSubDataset(
const char * pszPhysicalFile,
const char * pszResampling,
int nOverviews, int * panOverviewList,
int nBands, int * panBandList,
GDALProgressFunc pfnProgress, void * pProgressData)
{
if( osOvrFilename.length() == 0 && nOverviews > 0 )
{
VSIStatBufL sStatBuf;
int iSequence = 0; // Used after for.
for( iSequence = 0; iSequence < 100; iSequence++ )
{
osOvrFilename.Printf( "%s_%d.ovr", pszPhysicalFile, iSequence );
if( VSIStatExL( osOvrFilename, &sStatBuf,
VSI_STAT_EXISTS_FLAG ) != 0 )
{
CPLString osAdjustedOvrFilename;
if( poDS->GetMOFlags() & GMO_PAM_CLASS )
{
osAdjustedOvrFilename.Printf(
":::BASE:::%s_%d.ovr",
CPLGetFilename(pszPhysicalFile),
iSequence );
}
else
{
osAdjustedOvrFilename = osOvrFilename;
}
poDS->SetMetadataItem( "OVERVIEW_FILE",
osAdjustedOvrFilename,
"OVERVIEWS" );
break;
}
}
if( iSequence == 100 )
osOvrFilename = "";
}
return BuildOverviews( nullptr, pszResampling, nOverviews, panOverviewList,
nBands, panBandList, pfnProgress, pProgressData );
}
/************************************************************************/
/* BuildOverviews() */
/************************************************************************/
CPLErr
GDALDefaultOverviews::BuildOverviews(
const char * pszBasename,
const char * pszResampling,
int nOverviews, int * panOverviewList,
int nBands, int * panBandList,
GDALProgressFunc pfnProgress, void * pProgressData)
{
if( pfnProgress == nullptr )
pfnProgress = GDALDummyProgress;
if( nOverviews == 0 )
return CleanOverviews();
/* -------------------------------------------------------------------- */
/* If we don't already have an overview file, we need to decide */
/* what format to use. */
/* -------------------------------------------------------------------- */
if( poODS == nullptr )
{
bOvrIsAux = CPLTestBool(CPLGetConfigOption( "USE_RRD", "NO" ));
if( bOvrIsAux )
{
osOvrFilename = CPLResetExtension(poDS->GetDescription(),"aux");
VSIStatBufL sStatBuf;
if( VSIStatExL( osOvrFilename, &sStatBuf,
VSI_STAT_EXISTS_FLAG ) == 0 )
osOvrFilename.Printf( "%s.aux", poDS->GetDescription() );
}
}
/* -------------------------------------------------------------------- */
/* If we already have the overviews open, but they are */
/* read-only, then try and reopen them read-write. */
/* -------------------------------------------------------------------- */
else if( poODS->GetAccess() == GA_ReadOnly )
{
GDALClose( poODS );
poODS = GDALDataset::Open(
osOvrFilename, GDAL_OF_RASTER | GDAL_OF_UPDATE);
if( poODS == nullptr )
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* Our TIFF overview support currently only works safely if all */
/* bands are handled at the same time. */
/* -------------------------------------------------------------------- */
if( !bOvrIsAux && nBands != poDS->GetRasterCount() )
{
CPLError( CE_Failure, CPLE_NotSupported,
"Generation of overviews in external TIFF currently only "
"supported when operating on all bands. "
"Operation failed." );
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* If a basename is provided, use it to override the internal */
/* overview filename. */
/* -------------------------------------------------------------------- */
if( pszBasename == nullptr && osOvrFilename.length() == 0 )
pszBasename = poDS->GetDescription();
if( pszBasename != nullptr )
{
if( bOvrIsAux )
osOvrFilename.Printf( "%s.aux", pszBasename );
else
osOvrFilename.Printf( "%s.ovr", pszBasename );
}
/* -------------------------------------------------------------------- */
/* Establish which of the overview levels we already have, and */
/* which are new. We assume that band 1 of the file is */
/* representative. */
/* -------------------------------------------------------------------- */
GDALRasterBand *poBand = poDS->GetRasterBand( 1 );
int nNewOverviews = 0;
int *panNewOverviewList = static_cast<int *>(
CPLCalloc(sizeof(int), nOverviews) );
double dfAreaNewOverviews = 0;
double dfAreaRefreshedOverviews = 0;
std::vector<bool> abValidLevel(nOverviews, true);
std::vector<bool> abRequireRefresh(nOverviews, false);
bool bFoundSinglePixelOverview = false;
for( int i = 0; i < nOverviews && poBand != nullptr; i++ )
{
// If we already have a 1x1 overview and this new one would result
// in it too, then don't create it.
if( bFoundSinglePixelOverview &&
(poBand->GetXSize() + panOverviewList[i] - 1)
/ panOverviewList[i] == 1 &&
(poBand->GetYSize() + panOverviewList[i] - 1)
/ panOverviewList[i] == 1 )
{
abValidLevel[i] = false;
continue;
}
for( int j = 0; j < poBand->GetOverviewCount(); j++ )
{
GDALRasterBand * poOverview = poBand->GetOverview( j );
if( poOverview == nullptr )
continue;
int nOvFactor =
GDALComputeOvFactor(poOverview->GetXSize(),
poBand->GetXSize(),
poOverview->GetYSize(),
poBand->GetYSize());
if( nOvFactor == panOverviewList[i]
|| nOvFactor == GDALOvLevelAdjust2( panOverviewList[i],
poBand->GetXSize(),
poBand->GetYSize() ) )
{
abRequireRefresh[i] = true;
break;
}
}
if( abValidLevel[i] )
{
const double dfArea = 1.0 / (static_cast<double>(panOverviewList[i]) * panOverviewList[i]);
dfAreaRefreshedOverviews += dfArea;
if( !abRequireRefresh[i] )
{
dfAreaNewOverviews += dfArea;
panNewOverviewList[nNewOverviews++] = panOverviewList[i];
}
if( (poBand->GetXSize() + panOverviewList[i] - 1)
/ panOverviewList[i] == 1 &&
(poBand->GetYSize() + panOverviewList[i] - 1)
/ panOverviewList[i] == 1 )
{
bFoundSinglePixelOverview = true;
}
}
}
/* -------------------------------------------------------------------- */
/* Build band list. */
/* -------------------------------------------------------------------- */
GDALRasterBand **pahBands = static_cast<GDALRasterBand **>(
CPLCalloc(sizeof(GDALRasterBand *), nBands) );
for( int i = 0; i < nBands; i++ )
pahBands[i] = poDS->GetRasterBand( panBandList[i] );
/* -------------------------------------------------------------------- */
/* Build new overviews - Imagine. Keep existing file open if */
/* we have it. But mark all overviews as in need of */
/* regeneration, since HFAAuxBuildOverviews() doesn't actually */
/* produce the imagery. */
/* -------------------------------------------------------------------- */
CPLErr eErr = CE_None;
void* pScaledOverviewWithoutMask = GDALCreateScaledProgress(
0,
( HaveMaskFile() && poMaskDS ) ? double(nBands) / (nBands + 1) : 1,
pfnProgress, pProgressData );
void* pScaledProgress = GDALCreateScaledProgress(
0, dfAreaNewOverviews / dfAreaRefreshedOverviews,
GDALScaledProgress, pScaledOverviewWithoutMask );
if( bOvrIsAux )
{
if( nNewOverviews == 0 )
{
/* if we call HFAAuxBuildOverviews() with nNewOverviews == 0 */
/* because that there's no new, this will wipe existing */
/* overviews (#4831) */
// eErr = CE_None;
}
else
{
eErr = HFAAuxBuildOverviews( osOvrFilename, poDS, &poODS,
nBands, panBandList,
nNewOverviews, panNewOverviewList,
pszResampling,
GDALScaledProgress, pScaledProgress );
}
// HFAAuxBuildOverviews doesn't actually generate overviews
dfAreaNewOverviews = 0.0;
for( int j = 0; j < nOverviews; j++ )
{
if( abValidLevel[j] )
abRequireRefresh[j] = true;
}
}
/* -------------------------------------------------------------------- */
/* Build new overviews - TIFF. Close TIFF files while we */
/* operate on it. */
/* -------------------------------------------------------------------- */
else
{
if( poODS != nullptr )
{
delete poODS;
poODS = nullptr;
}
eErr = GTIFFBuildOverviews( osOvrFilename, nBands, pahBands,
nNewOverviews, panNewOverviewList,
pszResampling,
GDALScaledProgress, pScaledProgress );
// Probe for proxy overview filename.
if( eErr == CE_Failure )
{
const char *pszProxyOvrFilename =
poDS->GetMetadataItem("FILENAME","ProxyOverviewRequest");
if( pszProxyOvrFilename != nullptr )
{
osOvrFilename = pszProxyOvrFilename;
eErr = GTIFFBuildOverviews( osOvrFilename, nBands, pahBands,
nNewOverviews, panNewOverviewList,
pszResampling,
GDALScaledProgress, pScaledProgress );
}
}
if( eErr == CE_None )
{
poODS = GDALDataset::Open(
osOvrFilename, GDAL_OF_RASTER | GDAL_OF_UPDATE );
if( poODS == nullptr )
eErr = CE_Failure;
}
}
GDALDestroyScaledProgress( pScaledProgress );
/* -------------------------------------------------------------------- */
/* Refresh old overviews that were listed. */
/* -------------------------------------------------------------------- */
GDALRasterBand **papoOverviewBands = static_cast<GDALRasterBand **>(
CPLCalloc(sizeof(void*), nOverviews) );
for( int iBand = 0; iBand < nBands && eErr == CE_None; iBand++ )
{
poBand = poDS->GetRasterBand( panBandList[iBand] );
if( poBand == nullptr )
{
eErr = CE_Failure;
break;
}
nNewOverviews = 0;
std::vector<bool> abAlreadyUsedOverviewBand(
poBand->GetOverviewCount(), false);
for( int i = 0; i < nOverviews; i++ )
{
if( !abValidLevel[i] || !abRequireRefresh[i] )
continue;
for( int j = 0; j < poBand->GetOverviewCount(); j++ )
{
if( abAlreadyUsedOverviewBand[j] )
continue;
GDALRasterBand * poOverview = poBand->GetOverview( j );
if( poOverview == nullptr )
continue;
int bHasNoData = FALSE;
double noDataValue = poBand->GetNoDataValue(&bHasNoData);
if( bHasNoData )
poOverview->SetNoDataValue(noDataValue);
const int nOvFactor =
GDALComputeOvFactor(poOverview->GetXSize(),
poBand->GetXSize(),
poOverview->GetYSize(),
poBand->GetYSize());
if( nOvFactor == panOverviewList[i] ||
nOvFactor == GDALOvLevelAdjust2( panOverviewList[i],
poBand->GetXSize(),
poBand->GetYSize() ))
{
abAlreadyUsedOverviewBand[j] = true;
CPLAssert(nNewOverviews < poBand->GetOverviewCount());
papoOverviewBands[nNewOverviews++] = poOverview;
break;
}
}
}
if( nNewOverviews > 0 )
{
const double dfOffset = dfAreaNewOverviews / dfAreaRefreshedOverviews;
const double dfScale = 1.0 - dfOffset;
pScaledProgress = GDALCreateScaledProgress(
dfOffset + dfScale * iBand / nBands,
dfOffset + dfScale * (iBand+1) / nBands,
GDALScaledProgress, pScaledOverviewWithoutMask );
eErr = GDALRegenerateOverviews( GDALRasterBand::ToHandle(poBand),
nNewOverviews,
reinterpret_cast<GDALRasterBandH*>(papoOverviewBands),
pszResampling,
GDALScaledProgress, pScaledProgress );
GDALDestroyScaledProgress( pScaledProgress );
}
}
/* -------------------------------------------------------------------- */
/* Cleanup */
/* -------------------------------------------------------------------- */
CPLFree( papoOverviewBands );
CPLFree( panNewOverviewList );
CPLFree( pahBands );
GDALDestroyScaledProgress( pScaledOverviewWithoutMask );
/* -------------------------------------------------------------------- */
/* If we have a mask file, we need to build its overviews too. */
/* -------------------------------------------------------------------- */
if( HaveMaskFile() && poMaskDS && eErr == CE_None )
{
// Some config option are not compatible with mask overviews
// so unset them, and define more sensible values.
const bool bJPEG =
EQUAL(CPLGetConfigOption("COMPRESS_OVERVIEW", ""), "JPEG");
const bool bPHOTOMETRIC_YCBCR =
EQUAL(CPLGetConfigOption("PHOTOMETRIC_OVERVIEW", ""), "YCBCR");
if( bJPEG )
CPLSetThreadLocalConfigOption("COMPRESS_OVERVIEW", "DEFLATE");
if( bPHOTOMETRIC_YCBCR )
CPLSetThreadLocalConfigOption("PHOTOMETRIC_OVERVIEW", "");
pScaledProgress = GDALCreateScaledProgress(
double(nBands) / (nBands + 1),
1.0,
pfnProgress, pProgressData );
eErr = poMaskDS->BuildOverviews( pszResampling, nOverviews, panOverviewList,
0, nullptr, GDALScaledProgress, pScaledProgress );
GDALDestroyScaledProgress( pScaledProgress );
// Restore config option.
if( bJPEG )
CPLSetThreadLocalConfigOption("COMPRESS_OVERVIEW", "JPEG");
if( bPHOTOMETRIC_YCBCR )
CPLSetThreadLocalConfigOption("PHOTOMETRIC_OVERVIEW", "YCBCR");
if( bOwnMaskDS )
{
// Reset the poMask member of main dataset bands, since it
// will become invalid after poMaskDS closing.
for( int iBand = 1; iBand <= poDS->GetRasterCount(); iBand ++ )
{
GDALRasterBand *poOtherBand = poDS->GetRasterBand(iBand);
if( poOtherBand != nullptr )
poOtherBand->InvalidateMaskBand();
}
GDALClose( poMaskDS );
}
// force next request to reread mask file.
poMaskDS = nullptr;
bOwnMaskDS = false;
bCheckedForMask = false;
}
/* -------------------------------------------------------------------- */
/* If we have an overview dataset, then mark all the overviews */
/* with the base dataset Used later for finding overviews */
/* masks. Uggg. */
/* -------------------------------------------------------------------- */
if( poODS )
{
const int nOverviewCount = GetOverviewCount(1);
for( int iOver = 0; iOver < nOverviewCount; iOver++ )
{
GDALRasterBand *poOtherBand = GetOverview( 1, iOver );
GDALDataset *poOverDS = poOtherBand != nullptr ?
poOtherBand->GetDataset() : nullptr;