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vrtsources.cpp
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/******************************************************************************
*
* Project: Virtual GDAL Datasets
* Purpose: Implementation of VRTSimpleSource, VRTFuncSource and
* VRTAveragedSource.
* Author: Frank Warmerdam <warmerdam@pobox.com>
*
******************************************************************************
* Copyright (c) 2001, Frank Warmerdam <warmerdam@pobox.com>
* Copyright (c) 2008-2013, 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 "gdal_vrt.h"
#include "vrtdataset.h"
#include <cassert>
#include <climits>
#include <cmath>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <limits>
#include <string>
#include "cpl_conv.h"
#include "cpl_error.h"
#include "cpl_hash_set.h"
#include "cpl_minixml.h"
#include "cpl_progress.h"
#include "cpl_string.h"
#include "cpl_vsi.h"
#include "gdal.h"
#include "gdal_priv.h"
#include "gdal_proxy.h"
#include "gdal_priv_templates.hpp"
/*! @cond Doxygen_Suppress */
// #define DEBUG_VERBOSE 1
// See #5459
#ifdef isnan
#define HAS_ISNAN_MACRO
#endif
#include <algorithm>
#if defined(HAS_ISNAN_MACRO) && !defined(isnan)
#define isnan std::isnan
#endif
/************************************************************************/
/* ==================================================================== */
/* VRTSource */
/* ==================================================================== */
/************************************************************************/
VRTSource::~VRTSource()
{
}
/************************************************************************/
/* GetFileList() */
/************************************************************************/
void VRTSource::GetFileList(char *** /* ppapszFileList */, int * /* pnSize */,
int * /* pnMaxSize */, CPLHashSet * /* hSetFiles */)
{
}
/************************************************************************/
/* ==================================================================== */
/* VRTSimpleSource */
/* ==================================================================== */
/************************************************************************/
/************************************************************************/
/* VRTSimpleSource() */
/************************************************************************/
VRTSimpleSource::VRTSimpleSource() = default;
/************************************************************************/
/* VRTSimpleSource() */
/************************************************************************/
VRTSimpleSource::VRTSimpleSource(const VRTSimpleSource *poSrcSource,
double dfXDstRatio, double dfYDstRatio)
: m_poMapSharedSources(poSrcSource->m_poMapSharedSources),
m_poRasterBand(poSrcSource->m_poRasterBand),
m_poMaskBandMainBand(poSrcSource->m_poMaskBandMainBand),
m_aosOpenOptions(poSrcSource->m_aosOpenOptions),
m_nBand(poSrcSource->m_nBand),
m_bGetMaskBand(poSrcSource->m_bGetMaskBand),
m_dfSrcXOff(poSrcSource->m_dfSrcXOff),
m_dfSrcYOff(poSrcSource->m_dfSrcYOff),
m_dfSrcXSize(poSrcSource->m_dfSrcXSize),
m_dfSrcYSize(poSrcSource->m_dfSrcYSize),
m_dfDstXOff(poSrcSource->m_dfDstXOff * dfXDstRatio),
m_dfDstYOff(poSrcSource->m_dfDstYOff * dfYDstRatio),
m_dfDstXSize(poSrcSource->m_dfDstXSize * dfXDstRatio),
m_dfDstYSize(poSrcSource->m_dfDstYSize * dfYDstRatio),
m_nMaxValue(poSrcSource->m_nMaxValue), m_bRelativeToVRTOri(-1),
m_nExplicitSharedStatus(poSrcSource->m_nExplicitSharedStatus),
m_osSrcDSName(poSrcSource->m_osSrcDSName),
m_bDropRefOnSrcBand(poSrcSource->m_bDropRefOnSrcBand)
{
}
/************************************************************************/
/* ~VRTSimpleSource() */
/************************************************************************/
VRTSimpleSource::~VRTSimpleSource()
{
if (!m_bDropRefOnSrcBand)
return;
if (m_poMaskBandMainBand != nullptr)
{
if (m_poMaskBandMainBand->GetDataset() != nullptr)
{
m_poMaskBandMainBand->GetDataset()->ReleaseRef();
}
}
else if (m_poRasterBand != nullptr &&
m_poRasterBand->GetDataset() != nullptr)
{
m_poRasterBand->GetDataset()->ReleaseRef();
}
}
/************************************************************************/
/* FlushCache() */
/************************************************************************/
CPLErr VRTSimpleSource::FlushCache(bool bAtClosing)
{
if (m_poMaskBandMainBand != nullptr)
{
return m_poMaskBandMainBand->FlushCache(bAtClosing);
}
else if (m_poRasterBand != nullptr)
{
return m_poRasterBand->FlushCache(bAtClosing);
}
return CE_None;
}
/************************************************************************/
/* UnsetPreservedRelativeFilenames() */
/************************************************************************/
void VRTSimpleSource::UnsetPreservedRelativeFilenames()
{
if (!STARTS_WITH(m_osSourceFileNameOri.c_str(), "http://") &&
!STARTS_WITH(m_osSourceFileNameOri.c_str(), "https://"))
{
m_bRelativeToVRTOri = -1;
m_osSourceFileNameOri = "";
}
}
/************************************************************************/
/* SetSrcBand() */
/************************************************************************/
void VRTSimpleSource::SetSrcBand(const char *pszFilename, int nBand)
{
m_nBand = nBand;
m_osSrcDSName = pszFilename;
}
/************************************************************************/
/* SetSrcBand() */
/************************************************************************/
void VRTSimpleSource::SetSrcBand(GDALRasterBand *poNewSrcBand)
{
m_poRasterBand = poNewSrcBand;
m_nBand = m_poRasterBand->GetBand();
auto poDS = poNewSrcBand->GetDataset();
if (poDS != nullptr)
{
m_osSrcDSName = poDS->GetDescription();
m_aosOpenOptions = CSLDuplicate(poDS->GetOpenOptions());
}
}
/************************************************************************/
/* SetSrcMaskBand() */
/************************************************************************/
// poSrcBand is not the mask band, but the band from which the mask band is
// taken.
void VRTSimpleSource::SetSrcMaskBand(GDALRasterBand *poNewSrcBand)
{
m_poRasterBand = poNewSrcBand->GetMaskBand();
m_poMaskBandMainBand = poNewSrcBand;
m_nBand = poNewSrcBand->GetBand();
auto poDS = poNewSrcBand->GetDataset();
if (poDS != nullptr)
{
m_osSrcDSName = poDS->GetDescription();
m_aosOpenOptions = CSLDuplicate(poDS->GetOpenOptions());
}
m_bGetMaskBand = true;
}
/************************************************************************/
/* RoundIfCloseToInt() */
/************************************************************************/
static double RoundIfCloseToInt(double dfValue)
{
double dfClosestInt = floor(dfValue + 0.5);
return (fabs(dfValue - dfClosestInt) < 1e-3) ? dfClosestInt : dfValue;
}
/************************************************************************/
/* SetSrcWindow() */
/************************************************************************/
void VRTSimpleSource::SetSrcWindow(double dfNewXOff, double dfNewYOff,
double dfNewXSize, double dfNewYSize)
{
m_dfSrcXOff = RoundIfCloseToInt(dfNewXOff);
m_dfSrcYOff = RoundIfCloseToInt(dfNewYOff);
m_dfSrcXSize = RoundIfCloseToInt(dfNewXSize);
m_dfSrcYSize = RoundIfCloseToInt(dfNewYSize);
}
/************************************************************************/
/* SetDstWindow() */
/************************************************************************/
void VRTSimpleSource::SetDstWindow(double dfNewXOff, double dfNewYOff,
double dfNewXSize, double dfNewYSize)
{
m_dfDstXOff = RoundIfCloseToInt(dfNewXOff);
m_dfDstYOff = RoundIfCloseToInt(dfNewYOff);
m_dfDstXSize = RoundIfCloseToInt(dfNewXSize);
m_dfDstYSize = RoundIfCloseToInt(dfNewYSize);
}
/************************************************************************/
/* GetDstWindow() */
/************************************************************************/
void VRTSimpleSource::GetDstWindow(double &dfDstXOff, double &dfDstYOff,
double &dfDstXSize, double &dfDstYSize)
{
dfDstXOff = m_dfDstXOff;
dfDstYOff = m_dfDstYOff;
dfDstXSize = m_dfDstXSize;
dfDstYSize = m_dfDstYSize;
}
/************************************************************************/
/* SerializeToXML() */
/************************************************************************/
static const char *const apszSpecialSyntax[] = {
"NITF_IM:{ANY}:{FILENAME}", "PDF:{ANY}:{FILENAME}",
"RASTERLITE:{FILENAME},{ANY}", "TILEDB:\"{FILENAME}\":{ANY}",
"TILEDB:{FILENAME}:{ANY}"};
static bool IsSlowSource(const char *pszSrcName)
{
return strstr(pszSrcName, "/vsicurl/http") != nullptr ||
strstr(pszSrcName, "/vsicurl/ftp") != nullptr ||
(strstr(pszSrcName, "/vsicurl?") != nullptr &&
strstr(pszSrcName, "&url=http") != nullptr);
}
CPLXMLNode *VRTSimpleSource::SerializeToXML(const char *pszVRTPath)
{
CPLXMLNode *const psSrc =
CPLCreateXMLNode(nullptr, CXT_Element, "SimpleSource");
if (!m_osResampling.empty())
{
CPLCreateXMLNode(CPLCreateXMLNode(psSrc, CXT_Attribute, "resampling"),
CXT_Text, m_osResampling.c_str());
}
VSIStatBufL sStat;
int bRelativeToVRT = FALSE; // TODO(schwehr): Make this a bool?
std::string osSourceFilename;
if (m_bRelativeToVRTOri >= 0)
{
osSourceFilename = m_osSourceFileNameOri;
bRelativeToVRT = m_bRelativeToVRTOri;
}
else if (IsSlowSource(m_osSrcDSName))
{
// Testing the existence of remote resources can be excruciating
// slow, so let's just suppose they exist.
osSourceFilename = m_osSrcDSName;
bRelativeToVRT = FALSE;
}
// If this isn't actually a file, don't even try to know if it is a
// relative path. It can't be !, and unfortunately CPLIsFilenameRelative()
// can only work with strings that are filenames To be clear
// NITF_TOC_ENTRY:CADRG_JOG-A_250K_1_0:some_path isn't a relative file
// path.
else if (VSIStatExL(m_osSrcDSName, &sStat, VSI_STAT_EXISTS_FLAG) != 0)
{
osSourceFilename = m_osSrcDSName;
bRelativeToVRT = FALSE;
// Try subdatasetinfo API first
// Note: this will become the only branch when subdatasetinfo will become
// available for NITF_IM, RASTERLITE and TILEDB
const auto oSubDSInfo{GDALGetSubdatasetInfo(osSourceFilename.c_str())};
if (oSubDSInfo && !oSubDSInfo->GetPathComponent().empty())
{
auto path{oSubDSInfo->GetPathComponent()};
std::string relPath{CPLExtractRelativePath(pszVRTPath, path.c_str(),
&bRelativeToVRT)};
osSourceFilename = oSubDSInfo->ModifyPathComponent(relPath);
GDALDestroySubdatasetInfo(oSubDSInfo);
}
else
{
for (size_t i = 0;
i < sizeof(apszSpecialSyntax) / sizeof(apszSpecialSyntax[0]);
++i)
{
const char *const pszSyntax = apszSpecialSyntax[i];
CPLString osPrefix(pszSyntax);
osPrefix.resize(strchr(pszSyntax, ':') - pszSyntax + 1);
if (pszSyntax[osPrefix.size()] == '"')
osPrefix += '"';
if (EQUALN(osSourceFilename.c_str(), osPrefix, osPrefix.size()))
{
if (STARTS_WITH_CI(pszSyntax + osPrefix.size(), "{ANY}"))
{
const char *pszLastPart =
strrchr(osSourceFilename.c_str(), ':') + 1;
// CSV:z:/foo.xyz
if ((pszLastPart[0] == '/' || pszLastPart[0] == '\\') &&
pszLastPart - osSourceFilename.c_str() >= 3 &&
pszLastPart[-3] == ':')
pszLastPart -= 2;
CPLString osPrefixFilename(osSourceFilename);
osPrefixFilename.resize(pszLastPart -
osSourceFilename.c_str());
osSourceFilename = CPLExtractRelativePath(
pszVRTPath, pszLastPart, &bRelativeToVRT);
osSourceFilename = osPrefixFilename + osSourceFilename;
}
else if (STARTS_WITH_CI(pszSyntax + osPrefix.size(),
"{FILENAME}"))
{
CPLString osFilename(osSourceFilename.c_str() +
osPrefix.size());
size_t nPos = 0;
if (osFilename.size() >= 3 && osFilename[1] == ':' &&
(osFilename[2] == '\\' || osFilename[2] == '/'))
nPos = 2;
nPos = osFilename.find(
pszSyntax[osPrefix.size() + strlen("{FILENAME}")],
nPos);
if (nPos != std::string::npos)
{
const CPLString osSuffix = osFilename.substr(nPos);
osFilename.resize(nPos);
osSourceFilename = CPLExtractRelativePath(
pszVRTPath, osFilename, &bRelativeToVRT);
osSourceFilename =
osPrefix + osSourceFilename + osSuffix;
}
}
break;
}
}
}
}
else
{
std::string osVRTFilename = pszVRTPath;
std::string osSourceDataset = m_osSrcDSName;
char *pszCurDir = CPLGetCurrentDir();
if (CPLIsFilenameRelative(osSourceDataset.c_str()) &&
!CPLIsFilenameRelative(osVRTFilename.c_str()) &&
pszCurDir != nullptr)
{
osSourceDataset =
CPLFormFilename(pszCurDir, osSourceDataset.c_str(), nullptr);
}
else if (!CPLIsFilenameRelative(osSourceDataset.c_str()) &&
CPLIsFilenameRelative(osVRTFilename.c_str()) &&
pszCurDir != nullptr)
{
osVRTFilename =
CPLFormFilename(pszCurDir, osVRTFilename.c_str(), nullptr);
}
CPLFree(pszCurDir);
osSourceFilename = CPLExtractRelativePath(
osVRTFilename.c_str(), osSourceDataset.c_str(), &bRelativeToVRT);
}
CPLSetXMLValue(psSrc, "SourceFilename", osSourceFilename.c_str());
CPLCreateXMLNode(CPLCreateXMLNode(CPLGetXMLNode(psSrc, "SourceFilename"),
CXT_Attribute, "relativeToVRT"),
CXT_Text, bRelativeToVRT ? "1" : "0");
// Determine if we must write the shared attribute. The config option
// will override the m_nExplicitSharedStatus value
const char *pszShared = CPLGetConfigOption("VRT_SHARED_SOURCE", nullptr);
if ((pszShared == nullptr && m_nExplicitSharedStatus == 0) ||
(pszShared != nullptr && !CPLTestBool(pszShared)))
{
CPLCreateXMLNode(
CPLCreateXMLNode(CPLGetXMLNode(psSrc, "SourceFilename"),
CXT_Attribute, "shared"),
CXT_Text, "0");
}
GDALSerializeOpenOptionsToXML(psSrc, m_aosOpenOptions.List());
if (m_bGetMaskBand)
CPLSetXMLValue(psSrc, "SourceBand", CPLSPrintf("mask,%d", m_nBand));
else
CPLSetXMLValue(psSrc, "SourceBand", CPLSPrintf("%d", m_nBand));
// TODO: in a later version, no longer emit SourceProperties, which
// is no longer used by GDAL 3.4
if (m_poRasterBand)
{
/* Write a few additional useful properties of the dataset */
/* so that we can use a proxy dataset when re-opening. See XMLInit() */
/* below */
CPLSetXMLValue(psSrc, "SourceProperties.#RasterXSize",
CPLSPrintf("%d", m_poRasterBand->GetXSize()));
CPLSetXMLValue(psSrc, "SourceProperties.#RasterYSize",
CPLSPrintf("%d", m_poRasterBand->GetYSize()));
CPLSetXMLValue(
psSrc, "SourceProperties.#DataType",
GDALGetDataTypeName(m_poRasterBand->GetRasterDataType()));
int nBlockXSize = 0;
int nBlockYSize = 0;
m_poRasterBand->GetBlockSize(&nBlockXSize, &nBlockYSize);
CPLSetXMLValue(psSrc, "SourceProperties.#BlockXSize",
CPLSPrintf("%d", nBlockXSize));
CPLSetXMLValue(psSrc, "SourceProperties.#BlockYSize",
CPLSPrintf("%d", nBlockYSize));
}
if (m_dfSrcXOff != -1 || m_dfSrcYOff != -1 || m_dfSrcXSize != -1 ||
m_dfSrcYSize != -1)
{
CPLSetXMLValue(psSrc, "SrcRect.#xOff",
CPLSPrintf("%.15g", m_dfSrcXOff));
CPLSetXMLValue(psSrc, "SrcRect.#yOff",
CPLSPrintf("%.15g", m_dfSrcYOff));
CPLSetXMLValue(psSrc, "SrcRect.#xSize",
CPLSPrintf("%.15g", m_dfSrcXSize));
CPLSetXMLValue(psSrc, "SrcRect.#ySize",
CPLSPrintf("%.15g", m_dfSrcYSize));
}
if (m_dfDstXOff != -1 || m_dfDstYOff != -1 || m_dfDstXSize != -1 ||
m_dfDstYSize != -1)
{
CPLSetXMLValue(psSrc, "DstRect.#xOff",
CPLSPrintf("%.15g", m_dfDstXOff));
CPLSetXMLValue(psSrc, "DstRect.#yOff",
CPLSPrintf("%.15g", m_dfDstYOff));
CPLSetXMLValue(psSrc, "DstRect.#xSize",
CPLSPrintf("%.15g", m_dfDstXSize));
CPLSetXMLValue(psSrc, "DstRect.#ySize",
CPLSPrintf("%.15g", m_dfDstYSize));
}
return psSrc;
}
/************************************************************************/
/* XMLInit() */
/************************************************************************/
CPLErr
VRTSimpleSource::XMLInit(CPLXMLNode *psSrc, const char *pszVRTPath,
std::map<CPLString, GDALDataset *> &oMapSharedSources)
{
m_poMapSharedSources = &oMapSharedSources;
m_osResampling = CPLGetXMLValue(psSrc, "resampling", "");
/* -------------------------------------------------------------------- */
/* Prepare filename. */
/* -------------------------------------------------------------------- */
CPLXMLNode *psSourceFileNameNode = CPLGetXMLNode(psSrc, "SourceFilename");
const char *pszFilename =
psSourceFileNameNode ? CPLGetXMLValue(psSourceFileNameNode, nullptr, "")
: "";
if (pszFilename[0] == '\0')
{
CPLError(CE_Warning, CPLE_AppDefined,
"Missing <SourceFilename> element in VRTRasterBand.");
return CE_Failure;
}
// Backup original filename and relativeToVRT so as to be able to
// serialize them identically again (#5985)
m_osSourceFileNameOri = pszFilename;
m_bRelativeToVRTOri =
atoi(CPLGetXMLValue(psSourceFileNameNode, "relativetoVRT", "0"));
const char *pszShared =
CPLGetXMLValue(psSourceFileNameNode, "shared", nullptr);
if (pszShared == nullptr)
{
pszShared = CPLGetConfigOption("VRT_SHARED_SOURCE", nullptr);
}
if (pszShared != nullptr)
{
m_nExplicitSharedStatus = CPLTestBool(pszShared);
}
if (pszVRTPath != nullptr && m_bRelativeToVRTOri)
{
// Try subdatasetinfo API first
// Note: this will become the only branch when subdatasetinfo will become
// available for NITF_IM, RASTERLITE and TILEDB
const auto oSubDSInfo{GDALGetSubdatasetInfo(pszFilename)};
if (oSubDSInfo && !oSubDSInfo->GetPathComponent().empty())
{
auto path{oSubDSInfo->GetPathComponent()};
m_osSrcDSName = oSubDSInfo->ModifyPathComponent(
CPLProjectRelativeFilename(pszVRTPath, path.c_str()));
GDALDestroySubdatasetInfo(oSubDSInfo);
}
else
{
bool bDone = false;
for (size_t i = 0;
i < sizeof(apszSpecialSyntax) / sizeof(apszSpecialSyntax[0]);
++i)
{
const char *pszSyntax = apszSpecialSyntax[i];
CPLString osPrefix(pszSyntax);
osPrefix.resize(strchr(pszSyntax, ':') - pszSyntax + 1);
if (pszSyntax[osPrefix.size()] == '"')
osPrefix += '"';
if (EQUALN(pszFilename, osPrefix, osPrefix.size()))
{
if (STARTS_WITH_CI(pszSyntax + osPrefix.size(), "{ANY}"))
{
const char *pszLastPart = strrchr(pszFilename, ':') + 1;
// CSV:z:/foo.xyz
if ((pszLastPart[0] == '/' || pszLastPart[0] == '\\') &&
pszLastPart - pszFilename >= 3 &&
pszLastPart[-3] == ':')
{
pszLastPart -= 2;
}
CPLString osPrefixFilename = pszFilename;
osPrefixFilename.resize(pszLastPart - pszFilename);
m_osSrcDSName =
osPrefixFilename +
CPLProjectRelativeFilename(pszVRTPath, pszLastPart);
bDone = true;
}
else if (STARTS_WITH_CI(pszSyntax + osPrefix.size(),
"{FILENAME}"))
{
CPLString osFilename(pszFilename + osPrefix.size());
size_t nPos = 0;
if (osFilename.size() >= 3 && osFilename[1] == ':' &&
(osFilename[2] == '\\' || osFilename[2] == '/'))
nPos = 2;
nPos = osFilename.find(
pszSyntax[osPrefix.size() + strlen("{FILENAME}")],
nPos);
if (nPos != std::string::npos)
{
const CPLString osSuffix = osFilename.substr(nPos);
osFilename.resize(nPos);
m_osSrcDSName = osPrefix +
CPLProjectRelativeFilename(
pszVRTPath, osFilename) +
osSuffix;
bDone = true;
}
}
break;
}
}
if (!bDone)
{
m_osSrcDSName =
CPLProjectRelativeFilename(pszVRTPath, pszFilename);
}
}
}
else
{
m_osSrcDSName = pszFilename;
}
const char *pszSourceBand = CPLGetXMLValue(psSrc, "SourceBand", "1");
m_bGetMaskBand = false;
if (STARTS_WITH_CI(pszSourceBand, "mask"))
{
m_bGetMaskBand = true;
if (pszSourceBand[4] == ',')
m_nBand = atoi(pszSourceBand + 5);
else
m_nBand = 1;
}
else
{
m_nBand = atoi(pszSourceBand);
}
if (!GDALCheckBandCount(m_nBand, 0))
{
CPLError(CE_Warning, CPLE_AppDefined,
"Invalid <SourceBand> element in VRTRasterBand.");
return CE_Failure;
}
m_aosOpenOptions = GDALDeserializeOpenOptionsFromXML(psSrc);
if (strstr(m_osSrcDSName.c_str(), "<VRTDataset") != nullptr)
m_aosOpenOptions.SetNameValue("ROOT_PATH", pszVRTPath);
return ParseSrcRectAndDstRect(psSrc);
}
/************************************************************************/
/* ParseSrcRectAndDstRect() */
/************************************************************************/
CPLErr VRTSimpleSource::ParseSrcRectAndDstRect(const CPLXMLNode *psSrc)
{
/* -------------------------------------------------------------------- */
/* Set characteristics. */
/* -------------------------------------------------------------------- */
const CPLXMLNode *const psSrcRect = CPLGetXMLNode(psSrc, "SrcRect");
if (psSrcRect)
{
double xOff = CPLAtof(CPLGetXMLValue(psSrcRect, "xOff", "-1"));
double yOff = CPLAtof(CPLGetXMLValue(psSrcRect, "yOff", "-1"));
double xSize = CPLAtof(CPLGetXMLValue(psSrcRect, "xSize", "-1"));
double ySize = CPLAtof(CPLGetXMLValue(psSrcRect, "ySize", "-1"));
// Test written that way to catch NaN values
if (!(xOff >= INT_MIN && xOff <= INT_MAX) ||
!(yOff >= INT_MIN && yOff <= INT_MAX) ||
!(xSize > 0 || xSize == -1) || xSize > INT_MAX ||
!(ySize > 0 || ySize == -1) || ySize > INT_MAX)
{
CPLError(CE_Failure, CPLE_AppDefined, "Wrong values in SrcRect");
return CE_Failure;
}
SetSrcWindow(xOff, yOff, xSize, ySize);
}
else
{
m_dfSrcXOff = -1;
m_dfSrcYOff = -1;
m_dfSrcXSize = -1;
m_dfSrcYSize = -1;
}
const CPLXMLNode *const psDstRect = CPLGetXMLNode(psSrc, "DstRect");
if (psDstRect)
{
double xOff = CPLAtof(CPLGetXMLValue(psDstRect, "xOff", "-1"));
double yOff = CPLAtof(CPLGetXMLValue(psDstRect, "yOff", "-1"));
double xSize = CPLAtof(CPLGetXMLValue(psDstRect, "xSize", "-1"));
double ySize = CPLAtof(CPLGetXMLValue(psDstRect, "ySize", "-1"));
// Test written that way to catch NaN values
if (!(xOff >= INT_MIN && xOff <= INT_MAX) ||
!(yOff >= INT_MIN && yOff <= INT_MAX) ||
!(xSize > 0 || xSize == -1) || xSize > INT_MAX ||
!(ySize > 0 || ySize == -1) || ySize > INT_MAX)
{
CPLError(CE_Failure, CPLE_AppDefined, "Wrong values in DstRect");
return CE_Failure;
}
SetDstWindow(xOff, yOff, xSize, ySize);
}
else
{
m_dfDstXOff = -1;
m_dfDstYOff = -1;
m_dfDstXSize = -1;
m_dfDstYSize = -1;
}
return CE_None;
}
/************************************************************************/
/* GetFileList() */
/************************************************************************/
void VRTSimpleSource::GetFileList(char ***ppapszFileList, int *pnSize,
int *pnMaxSize, CPLHashSet *hSetFiles)
{
if (!m_osSrcDSName.empty())
{
const char *pszFilename = m_osSrcDSName.c_str();
/* --------------------------------------------------------------------
*/
/* Is it already in the list ? */
/* --------------------------------------------------------------------
*/
if (CPLHashSetLookup(hSetFiles, pszFilename) != nullptr)
return;
/* --------------------------------------------------------------------
*/
/* Grow array if necessary */
/* --------------------------------------------------------------------
*/
if (*pnSize + 1 >= *pnMaxSize)
{
*pnMaxSize = std::max(*pnSize + 2, 2 + 2 * (*pnMaxSize));
*ppapszFileList = static_cast<char **>(
CPLRealloc(*ppapszFileList, sizeof(char *) * (*pnMaxSize)));
}
/* --------------------------------------------------------------------
*/
/* Add the string to the list */
/* --------------------------------------------------------------------
*/
(*ppapszFileList)[*pnSize] = CPLStrdup(pszFilename);
(*ppapszFileList)[(*pnSize + 1)] = nullptr;
CPLHashSetInsert(hSetFiles, (*ppapszFileList)[*pnSize]);
(*pnSize)++;
}
}
/************************************************************************/
/* OpenSource() */
/************************************************************************/
void VRTSimpleSource::OpenSource() const
{
CPLAssert(m_poRasterBand == nullptr);
/* ----------------------------------------------------------------- */
/* Create a proxy dataset */
/* ----------------------------------------------------------------- */
GDALProxyPoolDataset *proxyDS = nullptr;
std::string osKeyMapSharedSources;
if (m_poMapSharedSources)
{
osKeyMapSharedSources = m_osSrcDSName;
for (int i = 0; i < m_aosOpenOptions.size(); ++i)
{
osKeyMapSharedSources += "||";
osKeyMapSharedSources += m_aosOpenOptions[i];
}
auto oIter = m_poMapSharedSources->find(osKeyMapSharedSources);
if (oIter != m_poMapSharedSources->end())
proxyDS = cpl::down_cast<GDALProxyPoolDataset *>(oIter->second);
}
if (proxyDS == nullptr)
{
int bShared = true;
if (m_nExplicitSharedStatus != -1)
bShared = m_nExplicitSharedStatus;
const CPLString osUniqueHandle(CPLSPrintf("%p", m_poMapSharedSources));
proxyDS = GDALProxyPoolDataset::Create(
m_osSrcDSName, m_aosOpenOptions.List(), GA_ReadOnly, bShared,
osUniqueHandle.c_str());
if (proxyDS == nullptr)
return;
}
else
{
proxyDS->Reference();
}
if (m_bGetMaskBand)
{
GDALProxyPoolRasterBand *poMaskBand =
cpl::down_cast<GDALProxyPoolRasterBand *>(
proxyDS->GetRasterBand(m_nBand));
poMaskBand->AddSrcMaskBandDescriptionFromUnderlying();
}
/* -------------------------------------------------------------------- */
/* Get the raster band. */
/* -------------------------------------------------------------------- */
m_poRasterBand = proxyDS->GetRasterBand(m_nBand);
if (m_poRasterBand == nullptr || !ValidateOpenedBand(m_poRasterBand))
{
proxyDS->ReleaseRef();
return;
}
if (m_bGetMaskBand)
{
m_poRasterBand = m_poRasterBand->GetMaskBand();
if (m_poRasterBand == nullptr)
{
proxyDS->ReleaseRef();
return;
}
m_poMaskBandMainBand = m_poRasterBand;
}
if (m_poMapSharedSources)
{
(*m_poMapSharedSources)[osKeyMapSharedSources] = proxyDS;
}
}
/************************************************************************/
/* GetRasterBand() */
/************************************************************************/
GDALRasterBand *VRTSimpleSource::GetRasterBand() const
{
if (m_poRasterBand == nullptr)
OpenSource();
return m_poRasterBand;
}
/************************************************************************/
/* GetMaskBandMainBand() */
/************************************************************************/
GDALRasterBand *VRTSimpleSource::GetMaskBandMainBand()
{
if (m_poRasterBand == nullptr)
OpenSource();
return m_poMaskBandMainBand;
}
/************************************************************************/
/* IsSameExceptBandNumber() */
/************************************************************************/
int VRTSimpleSource::IsSameExceptBandNumber(VRTSimpleSource *poOtherSource)
{
return m_dfSrcXOff == poOtherSource->m_dfSrcXOff &&
m_dfSrcYOff == poOtherSource->m_dfSrcYOff &&
m_dfSrcXSize == poOtherSource->m_dfSrcXSize &&
m_dfSrcYSize == poOtherSource->m_dfSrcYSize &&
m_dfDstXOff == poOtherSource->m_dfDstXOff &&
m_dfDstYOff == poOtherSource->m_dfDstYOff &&
m_dfDstXSize == poOtherSource->m_dfDstXSize &&
m_dfDstYSize == poOtherSource->m_dfDstYSize &&
!m_osSrcDSName.empty() &&
m_osSrcDSName == poOtherSource->m_osSrcDSName;
}
/************************************************************************/
/* SrcToDst() */
/* */
/* Note: this is a no-op if the dst window is -1,-1,-1,-1. */
/************************************************************************/
void VRTSimpleSource::SrcToDst(double dfX, double dfY, double &dfXOut,
double &dfYOut) const
{
dfXOut = ((dfX - m_dfSrcXOff) / m_dfSrcXSize) * m_dfDstXSize + m_dfDstXOff;
dfYOut = ((dfY - m_dfSrcYOff) / m_dfSrcYSize) * m_dfDstYSize + m_dfDstYOff;
}
/************************************************************************/
/* DstToSrc() */
/* */
/* Note: this is a no-op if the dst window is -1,-1,-1,-1. */
/************************************************************************/
void VRTSimpleSource::DstToSrc(double dfX, double dfY, double &dfXOut,
double &dfYOut) const
{
dfXOut = ((dfX - m_dfDstXOff) / m_dfDstXSize) * m_dfSrcXSize + m_dfSrcXOff;
dfYOut = ((dfY - m_dfDstYOff) / m_dfDstYSize) * m_dfSrcYSize + m_dfSrcYOff;
}
/************************************************************************/
/* GetSrcDstWindow() */
/************************************************************************/
int VRTSimpleSource::GetSrcDstWindow(
double dfXOff, double dfYOff, double dfXSize, double dfYSize, int nBufXSize,
int nBufYSize, double *pdfReqXOff, double *pdfReqYOff, double *pdfReqXSize,
double *pdfReqYSize, int *pnReqXOff, int *pnReqYOff, int *pnReqXSize,
int *pnReqYSize, int *pnOutXOff, int *pnOutYOff, int *pnOutXSize,
int *pnOutYSize, bool &bErrorOut)
{
bErrorOut = false;
if (m_dfSrcXSize == 0.0 || m_dfSrcYSize == 0.0 || m_dfDstXSize == 0.0 ||
m_dfDstYSize == 0.0)
{
return FALSE;
}
const bool bDstWinSet = m_dfDstXOff != -1 || m_dfDstXSize != -1 ||
m_dfDstYOff != -1 || m_dfDstYSize != -1;
#ifdef DEBUG
const bool bSrcWinSet = m_dfSrcXOff != -1 || m_dfSrcXSize != -1 ||
m_dfSrcYOff != -1 || m_dfSrcYSize != -1;
if (bSrcWinSet != bDstWinSet)
{
return FALSE;
}
#endif
/* -------------------------------------------------------------------- */
/* If the input window completely misses the portion of the */
/* virtual dataset provided by this source we have nothing to do. */
/* -------------------------------------------------------------------- */
if (bDstWinSet)
{
if (dfXOff >= m_dfDstXOff + m_dfDstXSize ||
dfYOff >= m_dfDstYOff + m_dfDstYSize ||
dfXOff + dfXSize <= m_dfDstXOff || dfYOff + dfYSize <= m_dfDstYOff)
return FALSE;
}
/* -------------------------------------------------------------------- */
/* This request window corresponds to the whole output buffer. */
/* -------------------------------------------------------------------- */
*pnOutXOff = 0;
*pnOutYOff = 0;
*pnOutXSize = nBufXSize;
*pnOutYSize = nBufYSize;
/* -------------------------------------------------------------------- */
/* If the input window extents outside the portion of the on */
/* the virtual file that this source can set, then clip down */
/* the requested window. */
/* -------------------------------------------------------------------- */
bool bModifiedX = false;
bool bModifiedY = false;
double dfRXOff = dfXOff;
double dfRYOff = dfYOff;
double dfRXSize = dfXSize;
double dfRYSize = dfYSize;
if (bDstWinSet)
{
if (dfRXOff < m_dfDstXOff)
{
dfRXSize = dfRXSize + dfRXOff - m_dfDstXOff;
dfRXOff = m_dfDstXOff;
bModifiedX = true;
}
if (dfRYOff < m_dfDstYOff)
{
dfRYSize = dfRYSize + dfRYOff - m_dfDstYOff;
dfRYOff = m_dfDstYOff;
bModifiedY = true;
}