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qgsgdalutils.cpp
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qgsgdalutils.cpp
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/***************************************************************************
qgsgdalutils.cpp
----------------
begin : September 2018
copyright : (C) 2018 Even Rouault
email : even.rouault at spatialys.com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgsgdalutils.h"
#include "qgslogger.h"
#include "qgsnetworkaccessmanager.h"
#include "qgssettings.h"
#define CPL_SUPRESS_CPLUSPLUS //#spellok
#include "gdal.h"
#include "gdalwarper.h"
#include "cpl_string.h"
#include <QNetworkProxy>
#include <QString>
#include <QImage>
bool QgsGdalUtils::supportsRasterCreate( GDALDriverH driver )
{
QString driverShortName = GDALGetDriverShortName( driver );
if ( driverShortName == QLatin1String( "SQLite" ) )
{
// it supports Create() but only for vector side
return false;
}
char **driverMetadata = GDALGetMetadata( driver, nullptr );
return CSLFetchBoolean( driverMetadata, GDAL_DCAP_CREATE, false ) &&
CSLFetchBoolean( driverMetadata, GDAL_DCAP_RASTER, false );
}
gdal::dataset_unique_ptr QgsGdalUtils::createSingleBandMemoryDataset( GDALDataType dataType, const QgsRectangle &extent, int width, int height, const QgsCoordinateReferenceSystem &crs )
{
return createMultiBandMemoryDataset( dataType, 1, extent, width, height, crs );
}
gdal::dataset_unique_ptr QgsGdalUtils::createMultiBandMemoryDataset( GDALDataType dataType, int bands, const QgsRectangle &extent, int width, int height, const QgsCoordinateReferenceSystem &crs )
{
GDALDriverH hDriverMem = GDALGetDriverByName( "MEM" );
if ( !hDriverMem )
{
return gdal::dataset_unique_ptr();
}
gdal::dataset_unique_ptr hSrcDS( GDALCreate( hDriverMem, "", width, height, bands, dataType, nullptr ) );
double cellSizeX = extent.width() / width;
double cellSizeY = extent.height() / height;
double geoTransform[6];
geoTransform[0] = extent.xMinimum();
geoTransform[1] = cellSizeX;
geoTransform[2] = 0;
geoTransform[3] = extent.yMinimum() + ( cellSizeY * height );
geoTransform[4] = 0;
geoTransform[5] = -cellSizeY;
GDALSetProjection( hSrcDS.get(), crs.toWkt( QgsCoordinateReferenceSystem::WKT_PREFERRED_GDAL ).toLatin1().constData() );
GDALSetGeoTransform( hSrcDS.get(), geoTransform );
return hSrcDS;
}
gdal::dataset_unique_ptr QgsGdalUtils::createSingleBandTiffDataset( const QString &filename, GDALDataType dataType, const QgsRectangle &extent, int width, int height, const QgsCoordinateReferenceSystem &crs )
{
double cellSizeX = extent.width() / width;
double cellSizeY = extent.height() / height;
double geoTransform[6];
geoTransform[0] = extent.xMinimum();
geoTransform[1] = cellSizeX;
geoTransform[2] = 0;
geoTransform[3] = extent.yMinimum() + ( cellSizeY * height );
geoTransform[4] = 0;
geoTransform[5] = -cellSizeY;
GDALDriverH hDriver = GDALGetDriverByName( "GTiff" );
if ( !hDriver )
{
return gdal::dataset_unique_ptr();
}
// Create the output file.
gdal::dataset_unique_ptr hDstDS( GDALCreate( hDriver, filename.toLocal8Bit().constData(), width, height, 1, dataType, nullptr ) );
if ( !hDstDS )
{
return gdal::dataset_unique_ptr();
}
// Write out the projection definition.
GDALSetProjection( hDstDS.get(), crs.toWkt( QgsCoordinateReferenceSystem::WKT_PREFERRED_GDAL ).toLatin1().constData() );
GDALSetGeoTransform( hDstDS.get(), geoTransform );
return hDstDS;
}
gdal::dataset_unique_ptr QgsGdalUtils::imageToMemoryDataset( const QImage &image )
{
if ( image.isNull() )
return nullptr;
const QRgb *rgb = reinterpret_cast<const QRgb *>( image.constBits() );
GDALDriverH hDriverMem = GDALGetDriverByName( "MEM" );
if ( !hDriverMem )
{
return nullptr;
}
gdal::dataset_unique_ptr hSrcDS( GDALCreate( hDriverMem, "", image.width(), image.height(), 0, GDT_Byte, nullptr ) );
char **papszOptions = QgsGdalUtils::papszFromStringList( QStringList()
<< QStringLiteral( "PIXELOFFSET=%1" ).arg( sizeof( QRgb ) )
<< QStringLiteral( "LINEOFFSET=%1" ).arg( image.bytesPerLine() )
<< QStringLiteral( "DATAPOINTER=%1" ).arg( reinterpret_cast< qulonglong >( rgb ) + 2 ) );
GDALAddBand( hSrcDS.get(), GDT_Byte, papszOptions );
CSLDestroy( papszOptions );
papszOptions = QgsGdalUtils::papszFromStringList( QStringList()
<< QStringLiteral( "PIXELOFFSET=%1" ).arg( sizeof( QRgb ) )
<< QStringLiteral( "LINEOFFSET=%1" ).arg( image.bytesPerLine() )
<< QStringLiteral( "DATAPOINTER=%1" ).arg( reinterpret_cast< qulonglong >( rgb ) + 1 ) );
GDALAddBand( hSrcDS.get(), GDT_Byte, papszOptions );
CSLDestroy( papszOptions );
papszOptions = QgsGdalUtils::papszFromStringList( QStringList()
<< QStringLiteral( "PIXELOFFSET=%1" ).arg( sizeof( QRgb ) )
<< QStringLiteral( "LINEOFFSET=%1" ).arg( image.bytesPerLine() )
<< QStringLiteral( "DATAPOINTER=%1" ).arg( reinterpret_cast< qulonglong >( rgb ) ) );
GDALAddBand( hSrcDS.get(), GDT_Byte, papszOptions );
CSLDestroy( papszOptions );
papszOptions = QgsGdalUtils::papszFromStringList( QStringList()
<< QStringLiteral( "PIXELOFFSET=%1" ).arg( sizeof( QRgb ) )
<< QStringLiteral( "LINEOFFSET=%1" ).arg( image.bytesPerLine() )
<< QStringLiteral( "DATAPOINTER=%1" ).arg( reinterpret_cast< qulonglong >( rgb ) + 3 ) );
GDALAddBand( hSrcDS.get(), GDT_Byte, papszOptions );
CSLDestroy( papszOptions );
return hSrcDS;
}
void QgsGdalUtils::resampleSingleBandRaster( GDALDatasetH hSrcDS, GDALDatasetH hDstDS, GDALResampleAlg resampleAlg )
{
gdal::warp_options_unique_ptr psWarpOptions( GDALCreateWarpOptions() );
psWarpOptions->hSrcDS = hSrcDS;
psWarpOptions->hDstDS = hDstDS;
psWarpOptions->nBandCount = 1;
psWarpOptions->panSrcBands = reinterpret_cast< int * >( CPLMalloc( sizeof( int ) * 1 ) );
psWarpOptions->panDstBands = reinterpret_cast< int * >( CPLMalloc( sizeof( int ) * 1 ) );
psWarpOptions->panSrcBands[0] = 1;
psWarpOptions->panDstBands[0] = 1;
psWarpOptions->eResampleAlg = resampleAlg;
// Establish reprojection transformer.
psWarpOptions->pTransformerArg =
GDALCreateGenImgProjTransformer( hSrcDS, GDALGetProjectionRef( hSrcDS ),
hDstDS, GDALGetProjectionRef( hDstDS ),
FALSE, 0.0, 1 );
psWarpOptions->pfnTransformer = GDALGenImgProjTransform;
// Initialize and execute the warp operation.
GDALWarpOperation oOperation;
oOperation.Initialize( psWarpOptions.get() );
oOperation.ChunkAndWarpImage( 0, 0, GDALGetRasterXSize( hDstDS ), GDALGetRasterYSize( hDstDS ) );
GDALDestroyGenImgProjTransformer( psWarpOptions->pTransformerArg );
}
QImage QgsGdalUtils::resampleImage( const QImage &image, QSize outputSize, GDALRIOResampleAlg resampleAlg )
{
gdal::dataset_unique_ptr srcDS = QgsGdalUtils::imageToMemoryDataset( image );
if ( !srcDS )
return QImage();
GDALRasterIOExtraArg extra;
INIT_RASTERIO_EXTRA_ARG( extra );
extra.eResampleAlg = resampleAlg;
QImage res( outputSize, image.format() );
if ( res.isNull() )
return QImage();
GByte *rgb = reinterpret_cast<GByte *>( res.bits() );
CPLErr err = GDALRasterIOEx( GDALGetRasterBand( srcDS.get(), 1 ), GF_Read, 0, 0, image.width(), image.height(), rgb + 2, outputSize.width(),
outputSize.height(), GDT_Byte, sizeof( QRgb ), res.bytesPerLine(), &extra );
if ( err != CE_None )
{
QgsDebugMsg( QStringLiteral( "failed to read red band" ) );
return QImage();
}
err = GDALRasterIOEx( GDALGetRasterBand( srcDS.get(), 2 ), GF_Read, 0, 0, image.width(), image.height(), rgb + 1, outputSize.width(),
outputSize.height(), GDT_Byte, sizeof( QRgb ), res.bytesPerLine(), &extra );
if ( err != CE_None )
{
QgsDebugMsg( QStringLiteral( "failed to read green band" ) );
return QImage();
}
err = GDALRasterIOEx( GDALGetRasterBand( srcDS.get(), 3 ), GF_Read, 0, 0, image.width(), image.height(), rgb, outputSize.width(),
outputSize.height(), GDT_Byte, sizeof( QRgb ), res.bytesPerLine(), &extra );
if ( err != CE_None )
{
QgsDebugMsg( QStringLiteral( "failed to read blue band" ) );
return QImage();
}
err = GDALRasterIOEx( GDALGetRasterBand( srcDS.get(), 4 ), GF_Read, 0, 0, image.width(), image.height(), rgb + 3, outputSize.width(),
outputSize.height(), GDT_Byte, sizeof( QRgb ), res.bytesPerLine(), &extra );
if ( err != CE_None )
{
QgsDebugMsg( QStringLiteral( "failed to read alpha band" ) );
return QImage();
}
return res;
}
QString QgsGdalUtils::helpCreationOptionsFormat( const QString &format )
{
QString message;
GDALDriverH myGdalDriver = GDALGetDriverByName( format.toLocal8Bit().constData() );
if ( myGdalDriver )
{
// first report details and help page
char **GDALmetadata = GDALGetMetadata( myGdalDriver, nullptr );
message += QLatin1String( "Format Details:\n" );
message += QStringLiteral( " Extension: %1\n" ).arg( CSLFetchNameValue( GDALmetadata, GDAL_DMD_EXTENSION ) );
message += QStringLiteral( " Short Name: %1" ).arg( GDALGetDriverShortName( myGdalDriver ) );
message += QStringLiteral( " / Long Name: %1\n" ).arg( GDALGetDriverLongName( myGdalDriver ) );
message += QStringLiteral( " Help page: http://www.gdal.org/%1\n\n" ).arg( CSLFetchNameValue( GDALmetadata, GDAL_DMD_HELPTOPIC ) );
// next get creation options
// need to serialize xml to get newlines, should we make the basic xml prettier?
CPLXMLNode *psCOL = CPLParseXMLString( GDALGetMetadataItem( myGdalDriver,
GDAL_DMD_CREATIONOPTIONLIST, "" ) );
char *pszFormattedXML = CPLSerializeXMLTree( psCOL );
if ( pszFormattedXML )
message += QString( pszFormattedXML );
if ( psCOL )
CPLDestroyXMLNode( psCOL );
if ( pszFormattedXML )
CPLFree( pszFormattedXML );
}
return message;
}
char **QgsGdalUtils::papszFromStringList( const QStringList &list )
{
char **papszRetList = nullptr;
const auto constList = list;
for ( const QString &elem : constList )
{
papszRetList = CSLAddString( papszRetList, elem.toLocal8Bit().constData() );
}
return papszRetList;
}
QString QgsGdalUtils::validateCreationOptionsFormat( const QStringList &createOptions, const QString &format )
{
GDALDriverH myGdalDriver = GDALGetDriverByName( format.toLocal8Bit().constData() );
if ( ! myGdalDriver )
return QStringLiteral( "invalid GDAL driver" );
char **papszOptions = papszFromStringList( createOptions );
// get error string?
int ok = GDALValidateCreationOptions( myGdalDriver, papszOptions );
CSLDestroy( papszOptions );
if ( !ok )
return QStringLiteral( "Failed GDALValidateCreationOptions() test" );
return QString();
}
#if GDAL_VERSION_NUM < GDAL_COMPUTE_VERSION(2,3,0)
// GDAL < 2.3 does not come with GDALWarpInitDefaultBandMapping and GDALWarpInitNoDataReal
// in the public API so we define them here for rpcAwareAutoCreateWarpedVrt()
static void GDALWarpInitDefaultBandMapping( GDALWarpOptions *psOptionsIn, int nBandCount )
{
if ( psOptionsIn->nBandCount != 0 ) { return; }
psOptionsIn->nBandCount = nBandCount;
psOptionsIn->panSrcBands = static_cast<int *>(
CPLMalloc( sizeof( int ) * psOptionsIn->nBandCount ) );
psOptionsIn->panDstBands = static_cast<int *>(
CPLMalloc( sizeof( int ) * psOptionsIn->nBandCount ) );
for ( int i = 0; i < psOptionsIn->nBandCount; i++ )
{
psOptionsIn->panSrcBands[i] = i + 1;
psOptionsIn->panDstBands[i] = i + 1;
}
}
static void InitNoData( int nBandCount, double **ppdNoDataReal, double dDataReal )
{
if ( nBandCount <= 0 ) { return; }
if ( *ppdNoDataReal != nullptr ) { return; }
*ppdNoDataReal = static_cast<double *>(
CPLMalloc( sizeof( double ) * nBandCount ) );
for ( int i = 0; i < nBandCount; ++i )
{
( *ppdNoDataReal )[i] = dDataReal;
}
}
static void GDALWarpInitNoDataReal( GDALWarpOptions *psOptionsIn, double dNoDataReal )
{
InitNoData( psOptionsIn->nBandCount, &psOptionsIn->padfDstNoDataReal, dNoDataReal );
InitNoData( psOptionsIn->nBandCount, &psOptionsIn->padfSrcNoDataReal, dNoDataReal );
// older GDAL also requires imaginary values to be set
InitNoData( psOptionsIn->nBandCount, &psOptionsIn->padfDstNoDataImag, 0 );
InitNoData( psOptionsIn->nBandCount, &psOptionsIn->padfSrcNoDataImag, 0 );
}
#endif
#if GDAL_VERSION_NUM < GDAL_COMPUTE_VERSION(3,2,0)
GDALDatasetH GDALAutoCreateWarpedVRTEx( GDALDatasetH hSrcDS, const char *pszSrcWKT, const char *pszDstWKT, GDALResampleAlg eResampleAlg,
double dfMaxError, const GDALWarpOptions *psOptionsIn, char **papszTransformerOptions )
{
VALIDATE_POINTER1( hSrcDS, "GDALAutoCreateWarpedVRT", nullptr );
/* -------------------------------------------------------------------- */
/* Populate the warp options. */
/* -------------------------------------------------------------------- */
GDALWarpOptions *psWO = nullptr;
if ( psOptionsIn != nullptr )
psWO = GDALCloneWarpOptions( psOptionsIn );
else
psWO = GDALCreateWarpOptions();
psWO->eResampleAlg = eResampleAlg;
psWO->hSrcDS = hSrcDS;
GDALWarpInitDefaultBandMapping( psWO, GDALGetRasterCount( hSrcDS ) );
/* -------------------------------------------------------------------- */
/* Setup no data values */
/* -------------------------------------------------------------------- */
for ( int i = 0; i < psWO->nBandCount; i++ )
{
GDALRasterBandH rasterBand = GDALGetRasterBand( psWO->hSrcDS, psWO->panSrcBands[i] );
int hasNoDataValue;
double noDataValue = GDALGetRasterNoDataValue( rasterBand, &hasNoDataValue );
if ( hasNoDataValue )
{
// Check if the nodata value is out of range
int bClamped = FALSE;
int bRounded = FALSE;
CPL_IGNORE_RET_VAL(
GDALAdjustValueToDataType( GDALGetRasterDataType( rasterBand ),
noDataValue, &bClamped, &bRounded ) );
if ( !bClamped )
{
GDALWarpInitNoDataReal( psWO, -1e10 );
psWO->padfSrcNoDataReal[i] = noDataValue;
psWO->padfDstNoDataReal[i] = noDataValue;
}
}
}
if ( psWO->padfDstNoDataReal != nullptr )
{
if ( CSLFetchNameValue( psWO->papszWarpOptions, "INIT_DEST" ) == nullptr )
{
psWO->papszWarpOptions =
CSLSetNameValue( psWO->papszWarpOptions, "INIT_DEST", "NO_DATA" );
}
}
/* -------------------------------------------------------------------- */
/* Create the transformer. */
/* -------------------------------------------------------------------- */
psWO->pfnTransformer = GDALGenImgProjTransform;
char **papszOptions = nullptr;
if ( pszSrcWKT != nullptr )
papszOptions = CSLSetNameValue( papszOptions, "SRC_SRS", pszSrcWKT );
if ( pszDstWKT != nullptr )
papszOptions = CSLSetNameValue( papszOptions, "DST_SRS", pszDstWKT );
papszOptions = CSLMerge( papszOptions, papszTransformerOptions );
psWO->pTransformerArg =
GDALCreateGenImgProjTransformer2( psWO->hSrcDS, nullptr,
papszOptions );
CSLDestroy( papszOptions );
if ( psWO->pTransformerArg == nullptr )
{
GDALDestroyWarpOptions( psWO );
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Figure out the desired output bounds and resolution. */
/* -------------------------------------------------------------------- */
double adfDstGeoTransform[6] = { 0.0 };
int nDstPixels = 0;
int nDstLines = 0;
CPLErr eErr =
GDALSuggestedWarpOutput( hSrcDS, psWO->pfnTransformer,
psWO->pTransformerArg,
adfDstGeoTransform, &nDstPixels, &nDstLines );
if ( eErr != CE_None )
{
GDALDestroyTransformer( psWO->pTransformerArg );
GDALDestroyWarpOptions( psWO );
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Update the transformer to include an output geotransform */
/* back to pixel/line coordinates. */
/* */
/* -------------------------------------------------------------------- */
GDALSetGenImgProjTransformerDstGeoTransform(
psWO->pTransformerArg, adfDstGeoTransform );
/* -------------------------------------------------------------------- */
/* Do we want to apply an approximating transformation? */
/* -------------------------------------------------------------------- */
if ( dfMaxError > 0.0 )
{
psWO->pTransformerArg =
GDALCreateApproxTransformer( psWO->pfnTransformer,
psWO->pTransformerArg,
dfMaxError );
psWO->pfnTransformer = GDALApproxTransform;
GDALApproxTransformerOwnsSubtransformer( psWO->pTransformerArg, TRUE );
}
/* -------------------------------------------------------------------- */
/* Create the VRT file. */
/* -------------------------------------------------------------------- */
GDALDatasetH hDstDS
= GDALCreateWarpedVRT( hSrcDS, nDstPixels, nDstLines,
adfDstGeoTransform, psWO );
GDALDestroyWarpOptions( psWO );
if ( pszDstWKT != nullptr )
GDALSetProjection( hDstDS, pszDstWKT );
else if ( pszSrcWKT != nullptr )
GDALSetProjection( hDstDS, pszSrcWKT );
else if ( GDALGetGCPCount( hSrcDS ) > 0 )
GDALSetProjection( hDstDS, GDALGetGCPProjection( hSrcDS ) );
else
GDALSetProjection( hDstDS, GDALGetProjectionRef( hSrcDS ) );
return hDstDS;
}
#endif
GDALDatasetH QgsGdalUtils::rpcAwareAutoCreateWarpedVrt(
GDALDatasetH hSrcDS,
const char *pszSrcWKT,
const char *pszDstWKT,
GDALResampleAlg eResampleAlg,
double dfMaxError,
const GDALWarpOptions *psOptionsIn )
{
char **opts = nullptr;
if ( GDALGetMetadata( hSrcDS, "RPC" ) )
{
// well-behaved RPC should have height offset a good value for RPC_HEIGHT
const char *heightOffStr = GDALGetMetadataItem( hSrcDS, "HEIGHT_OFF", "RPC" );
if ( heightOffStr )
opts = CSLAddNameValue( opts, "RPC_HEIGHT", heightOffStr );
}
return GDALAutoCreateWarpedVRTEx( hSrcDS, pszSrcWKT, pszDstWKT, eResampleAlg, dfMaxError, psOptionsIn, opts );
}
#ifndef QT_NO_NETWORKPROXY
void QgsGdalUtils::setupProxy()
{
// Check proxy configuration, they are application level but
// instead of adding an API and complex signal/slot connections
// given the limited cost of checking them on every provider instantiation
// we can do it here so that new settings are applied whenever a new layer
// is created.
QgsSettings settings;
// Check that proxy is enabled
if ( settings.value( QStringLiteral( "proxy/proxyEnabled" ), false ).toBool() )
{
// Get the first configured proxy
QList<QNetworkProxy> proxies( QgsNetworkAccessManager::instance()->proxyFactory()->queryProxy( ) );
if ( ! proxies.isEmpty() )
{
QNetworkProxy proxy( proxies.first() );
// TODO/FIXME: check excludes (the GDAL config options are global, we need a per-connection config option)
//QStringList excludes;
//excludes = settings.value( QStringLiteral( "proxy/proxyExcludedUrls" ), "" ).toStringList();
QString proxyHost( proxy.hostName() );
qint16 proxyPort( proxy.port() );
QString proxyUser( proxy.user() );
QString proxyPassword( proxy.password() );
if ( ! proxyHost.isEmpty() )
{
QString connection( proxyHost );
if ( proxyPort )
{
connection += ':' + QString::number( proxyPort );
}
CPLSetConfigOption( "GDAL_HTTP_PROXY", connection.toUtf8() );
if ( ! proxyUser.isEmpty( ) )
{
QString credentials( proxyUser );
if ( ! proxyPassword.isEmpty( ) )
{
credentials += ':' + proxyPassword;
}
CPLSetConfigOption( "GDAL_HTTP_PROXYUSERPWD", credentials.toUtf8() );
}
}
}
}
}
#endif