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qgswmsprovider.cpp
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qgswmsprovider.cpp
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/***************************************************************************
qgswmsprovider.cpp - QGIS Data provider for
OGC Web Map Service layers
-------------------
begin : 17 Mar, 2005
copyright : (C) 2005 by Brendan Morley
email : morb at ozemail dot com dot au
wms-c/wmts support : Jürgen E. Fischer < jef at norbit dot de >, norBIT GmbH
tile retry support : Luigi Pirelli < luipir at gmail dot com >
(funded by Regione Toscana-SITA)
contextual wms legend: Sandro Santilli < strk at keybit dot net >
***************************************************************************/
/***************************************************************************
* *
* 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 "qgslogger.h"
#include "qgswmsprovider.h"
#include "qgscoordinatetransform.h"
#include "qgswmsdataitems.h"
#include "qgsdatasourceuri.h"
#include "qgsfeaturestore.h"
#include "qgsgeometry.h"
#include "qgsrasteridentifyresult.h"
#include "qgsrectangle.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsmapsettings.h"
#include "qgsmbtiles.h"
#include "qgsmessageoutput.h"
#include "qgsmessagelog.h"
#include "qgsnetworkaccessmanager.h"
#include "qgssetrequestinitiator_p.h"
#include "qgsnetworkreplyparser.h"
#include "qgstilecache.h"
#include "qgsgdalutils.h"
#include "qgsgml.h"
#include "qgsgmlschema.h"
#include "qgswmscapabilities.h"
#include "qgsexception.h"
#include "qgssettings.h"
#include "qgssettingsregistrycore.h"
#include "qgsogrutils.h"
#include "qgsproviderregistry.h"
#include "qgsruntimeprofiler.h"
#include "qgstiledownloadmanager.h"
#include "qgsproviderutils.h"
#include "qgsprovidersublayerdetails.h"
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QNetworkProxy>
#include <QUrl>
#include <QImage>
#include <QImageReader>
#include <QPainter>
#include <QEventLoop>
#include <QTextCodec>
#include <QThread>
#include <QNetworkDiskCache>
#include <QTimer>
#include <QStringBuilder>
#include <QUrlQuery>
#include <QJsonArray>
#include <QRegularExpression>
#include <QRegularExpressionMatch>
#include <ogr_api.h>
#ifdef QGISDEBUG
#include <QFile>
#include <QDir>
#endif
#define ERR(message) QGS_ERROR_MESSAGE(message,"WMS provider")
#define QGS_ERROR(message) QgsError(message,"WMS provider")
QString QgsWmsProvider::WMS_KEY = QStringLiteral( "wms" );
QString QgsWmsProvider::WMS_DESCRIPTION = QStringLiteral( "OGC Web Map Service version 1.3 data provider" );
static QString DEFAULT_LATLON_CRS = QStringLiteral( "CRS:84" );
QMap<QString, QgsWmsStatistics::Stat> QgsWmsStatistics::sData;
//! a helper class for ordering tile requests according to the distance from view center
struct LessThanTileRequest
{
QgsPointXY center;
bool operator()( const QgsWmsProvider::TileRequest &req1, const QgsWmsProvider::TileRequest &req2 )
{
QPointF p1 = req1.rect.center();
QPointF p2 = req2.rect.center();
// using chessboard distance (loading order more natural than euclidean/manhattan distance)
double d1 = std::max( std::fabs( center.x() - p1.x() ), std::fabs( center.y() - p1.y() ) );
double d2 = std::max( std::fabs( center.x() - p2.x() ), std::fabs( center.y() - p2.y() ) );
return d1 < d2;
}
};
QgsWmsProvider::QgsWmsProvider( QString const &uri, const ProviderOptions &options, const QgsWmsCapabilities *capabilities )
: QgsRasterDataProvider( uri, options )
, mHttpGetLegendGraphicResponse( nullptr )
, mImageCrs( DEFAULT_LATLON_CRS )
{
QgsDebugMsgLevel( "constructing with uri '" + uri + "'.", 4 );
mSupportedGetFeatureFormats = QStringList() << QStringLiteral( "text/html" ) << QStringLiteral( "text/plain" ) << QStringLiteral( "text/xml" ) << QStringLiteral( "application/vnd.ogc.gml" ) << QStringLiteral( "application/json" );
mValid = false;
// URL may contain username/password information for a WMS
// requiring authentication. In this case the URL is prefixed
// with username=user,password=pass,url=http://xxx.xxx.xx/yyy...
if ( !mSettings.parseUri( uri ) )
{
appendError( ERR( tr( "Cannot parse URI" ) ) );
return;
}
if ( !addLayers() )
return;
std::unique_ptr< QgsScopedRuntimeProfile > profile;
if ( mSettings.mIsMBTiles )
{
if ( QgsApplication::profiler()->groupIsActive( QStringLiteral( "projectload" ) ) )
profile = std::make_unique< QgsScopedRuntimeProfile >( tr( "Setup tile capabilities" ), QStringLiteral( "projectload" ) );
// we are dealing with a local MBTiles file
if ( !setupMBTilesCapabilities( uri ) )
{
appendError( ERR( tr( "Cannot open MBTiles database" ) ) );
return;
}
}
else if ( mSettings.mXyz )
{
if ( QgsApplication::profiler()->groupIsActive( QStringLiteral( "projectload" ) ) )
profile = std::make_unique< QgsScopedRuntimeProfile >( tr( "Setup tile capabilities" ), QStringLiteral( "projectload" ) );
// we are working with XYZ tiles
// no need to get capabilities, the whole definition is in URI
// so we just generate a dummy WMTS definition
if ( !setupXyzCapabilities( uri ) )
{
return;
}
}
else
{
// we are working with WMS / WMTS server
// if there are already parsed capabilities, use them!
if ( capabilities )
mCaps = *capabilities;
if ( QgsApplication::profiler()->groupIsActive( QStringLiteral( "projectload" ) ) )
profile = std::make_unique< QgsScopedRuntimeProfile >( tr( "Retrieve server capabilities" ), QStringLiteral( "projectload" ) );
// Make sure we have capabilities - other functions here may need them
if ( !retrieveServerCapabilities() )
{
return;
}
// Setup temporal properties for layers in WMS-T
if ( mSettings.mIsTemporal )
{
QgsRasterDataProviderTemporalCapabilities *lTemporalCapabilities = temporalCapabilities();
Q_ASSERT_X( lTemporalCapabilities, "QgsWmsProvider::QgsWmsProvider()", "Data provider temporal capabilities object does not exist" );
lTemporalCapabilities->setHasTemporalCapabilities( true );
lTemporalCapabilities->setAvailableTemporalRange( mSettings.mFixedRange );
lTemporalCapabilities->setAllAvailableTemporalRanges( mSettings.mAllRanges );
lTemporalCapabilities->setDefaultInterval( mSettings.mDefaultInterval );
lTemporalCapabilities->setIntervalHandlingMethod( Qgis::TemporalIntervalMatchMethod::MatchExactUsingStartOfRange );
if ( mSettings.mIsBiTemporal )
{
lTemporalCapabilities->setAvailableReferenceTemporalRange( mSettings.mFixedReferenceRange );
}
}
if ( mSettings.mCrsId.isEmpty() && !mSettings.mActiveSubLayers.empty() )
{
// if crs not specified via layer uri, use the first available from server capabilities
for ( const QgsWmsLayerProperty &property : std::as_const( mCaps.mLayersSupported ) )
{
if ( property.name == mSettings.mActiveSubLayers[0] )
{
mSettings.mCrsId = property.preferredAvailableCrs();
break;
}
}
}
}
// setImageCrs is using mTiled !!!
if ( !setImageCrs( mSettings.mCrsId ) )
{
appendError( ERR( tr( "Cannot set CRS" ) ) );
return;
}
mCrs = QgsCoordinateReferenceSystem::fromOgcWmsCrs( mSettings.mCrsId );
if ( mSettings.mTiled )
{
// WMTS - may have time dimension
if ( !mTileLayer->allTimeRanges.empty() )
{
QgsRasterDataProviderTemporalCapabilities *lTemporalCapabilities = temporalCapabilities();
Q_ASSERT_X( lTemporalCapabilities, "QgsWmsProvider::QgsWmsProvider()", "Data provider temporal capabilities object does not exist" );
lTemporalCapabilities->setHasTemporalCapabilities( true );
lTemporalCapabilities->setAvailableTemporalRange( mTileLayer->temporalExtent );
lTemporalCapabilities->setAllAvailableTemporalRanges( mTileLayer->allTimeRanges );
lTemporalCapabilities->setDefaultInterval( mTileLayer->temporalInterval );
lTemporalCapabilities->setFlags( mTileLayer->temporalCapabilityFlags );
lTemporalCapabilities->setIntervalHandlingMethod( Qgis::TemporalIntervalMatchMethod::FindClosestMatchToStartOfRange );
}
if ( !mSettings.mXyz )
{
switch ( mSettings.mTilePixelRatio )
{
case Qgis::TilePixelRatio::Undefined:
mTileLayer->dpi = -1;
break;
case Qgis::TilePixelRatio::StandardDpi:
mTileLayer->dpi = 96;
break;
case Qgis::TilePixelRatio::HighDpi:
mTileLayer->dpi = 192;
break;
}
}
}
if ( profile )
profile->switchTask( tr( "Calculate extent" ) );
if ( !calculateExtent() || mLayerExtent.isEmpty() )
{
appendError( ERR( tr( "Cannot calculate extent" ) ) );
return;
}
// URL can be in 3 forms:
// 1) http://xxx.xxx.xx/yyy/yyy
// 2) http://xxx.xxx.xx/yyy/yyy?
// 3) http://xxx.xxx.xx/yyy/yyy?zzz=www
mConverter = QgsWmsInterpretationConverter::createConverter( mSettings.mInterpretation );
if ( mConverter && mConverter->representsElevation() )
{
elevationProperties()->setContainsElevationData( true );
}
mValid = true;
QgsDebugMsgLevel( QStringLiteral( "exiting constructor." ), 4 );
}
QString QgsWmsProvider::prepareUri( QString uri )
{
// some services provide a percent/url encoded (legend) uri string, always decode here
uri = QUrl::fromPercentEncoding( uri.toUtf8() );
if ( isUrlForWMTS( uri ) )
{
return uri;
}
if ( !uri.contains( QLatin1String( "?" ) ) )
{
uri.append( '?' );
}
else if ( uri.right( 1 ) != QLatin1String( "?" ) && uri.right( 1 ) != QLatin1String( "&" ) )
{
uri.append( '&' );
}
return uri;
}
QgsWmsProvider::~QgsWmsProvider()
{
QgsDebugMsgLevel( QStringLiteral( "deconstructing." ), 4 );
}
//! Returns the destination extent in image coordinate of a tile image defined by its extent
static QRectF destinationRect( const QgsRectangle &destinationExtent, const QRectF &tileImageExtent, int imagePixelWidth )
{
double cr = destinationExtent.width() / imagePixelWidth;
return QRectF( ( tileImageExtent.left() - destinationExtent.xMinimum() ) / cr,
( destinationExtent.yMaximum() - tileImageExtent.bottom() ) / cr,
tileImageExtent.width() / cr,
tileImageExtent.height() / cr );
}
QgsWmsProvider *QgsWmsProvider::clone() const
{
QgsDataProvider::ProviderOptions options;
QgsWmsProvider *provider = new QgsWmsProvider( dataSourceUri(), options, mCaps.isValid() ? &mCaps : nullptr );
provider->copyBaseSettings( *this );
return provider;
}
QString QgsWmsProvider::getMapUrl() const
{
return mCaps.mCapabilities.capability.request.getMap.dcpType.isEmpty()
? mSettings.mBaseUrl
: prepareUri( mCaps.mCapabilities.capability.request.getMap.dcpType.front().http.get.onlineResource.xlinkHref );
}
QString QgsWmsProvider::getFeatureInfoUrl() const
{
return mCaps.mCapabilities.capability.request.getFeatureInfo.dcpType.isEmpty()
? mSettings.mBaseUrl
: prepareUri( mCaps.mCapabilities.capability.request.getFeatureInfo.dcpType.front().http.get.onlineResource.xlinkHref );
}
QString QgsWmsProvider::getTileUrl() const
{
if ( mCaps.mCapabilities.capability.request.getTile.dcpType.isEmpty() ||
( !mCaps.mCapabilities.capability.request.getTile.allowedEncodings.isEmpty() &&
!mCaps.mCapabilities.capability.request.getTile.allowedEncodings.contains( QStringLiteral( "KVP" ) ) ) )
{
return QString();
}
else
{
return prepareUri( mCaps.mCapabilities.capability.request.getTile.dcpType.front().http.get.onlineResource.xlinkHref );
}
}
static bool isValidLegend( const QgsWmsLegendUrlProperty &l )
{
return l.format.startsWith( QLatin1String( "image/" ) );
}
/**
* Picks a usable legend URL for a given style.
*/
static QString pickLegend( const QgsWmsStyleProperty &s )
{
QString url;
for ( int k = 0; k < s.legendUrl.size() && url.isEmpty(); k++ )
{
const QgsWmsLegendUrlProperty &l = s.legendUrl[k];
if ( isValidLegend( l ) )
{
url = l.onlineResource.xlinkHref;
}
}
return url;
}
static const QgsWmsStyleProperty *searchStyle( const QVector<QgsWmsStyleProperty> &styles, const QString &name )
{
for ( const QgsWmsStyleProperty &s : styles )
if ( s.name == name )
return &s;
return nullptr;
}
QString QgsWmsProvider::getLegendGraphicUrl() const
{
QString url;
for ( int i = 0; i < mCaps.mLayersSupported.size() && url.isEmpty(); i++ )
{
const QgsWmsLayerProperty &l = mCaps.mLayersSupported[i];
if ( l.name == mSettings.mActiveSubLayers[0] )
{
if ( !mSettings.mActiveSubStyles[0].isEmpty() && mSettings.mActiveSubStyles[0] != QLatin1String( "default" ) )
{
const QgsWmsStyleProperty *s = searchStyle( l.style, mSettings.mActiveSubStyles[0] );
if ( s )
url = pickLegend( *s );
}
else
{
// QGIS wants the default style, but GetCapabilities doesn't give us a
// way to know what is the default style. So we look for the onlineResource
// only if there is a single style available or if there is a style called "default".
if ( l.style.size() == 1 )
{
url = pickLegend( l.style[0] );
}
else
{
const QgsWmsStyleProperty *s = searchStyle( l.style, QStringLiteral( "default" ) );
if ( s )
url = pickLegend( *s );
}
}
break;
}
}
if ( url.isEmpty() && !mCaps.mCapabilities.capability.request.getLegendGraphic.dcpType.isEmpty() )
{
url = mCaps.mCapabilities.capability.request.getLegendGraphic.dcpType.front().http.get.onlineResource.xlinkHref;
}
if ( url.isEmpty() )
{
for ( const QgsWmtsTileLayer &l : mCaps.mTileLayersSupported )
{
if ( l.identifier != mSettings.mActiveSubLayers[0] )
continue;
QHash<QString, QgsWmtsStyle>::const_iterator it = l.styles.constFind( mSettings.mActiveSubStyles[0] );
if ( it == l.styles.constEnd() )
if ( it == l.styles.end() )
continue;
for ( const QgsWmtsLegendURL &u : it.value().legendURLs )
{
if ( u.format == mSettings.mImageMimeType )
url = u.href;
}
if ( url.isEmpty() && !it.value().legendURLs.isEmpty() )
url = it.value().legendURLs.front().href;
if ( !url.isEmpty() )
break;
}
}
return url.isEmpty() ? url : prepareUri( url );
}
bool QgsWmsProvider::addLayers()
{
QgsDebugMsgLevel( "Entering: layers:" + mSettings.mActiveSubLayers.join( ", " ) + ", styles:" + mSettings.mActiveSubStyles.join( ", " ), 4 );
if ( mSettings.mActiveSubLayers.size() != mSettings.mActiveSubStyles.size() )
{
QgsMessageLog::logMessage( tr( "Number of layers and styles don't match" ), tr( "WMS" ) );
return false;
}
// Set the visibility of these new layers on by default
for ( const QString &layer : std::as_const( mSettings.mActiveSubLayers ) )
{
mActiveSubLayerVisibility[ layer ] = true;
QgsDebugMsgLevel( QStringLiteral( "set visibility of layer '%1' to true." ).arg( layer ), 3 );
}
// now that the layers have changed, the extent will as well.
mExtentDirty = true;
if ( mSettings.mTiled )
mTileLayer = nullptr;
QgsDebugMsgLevel( QStringLiteral( "Exiting." ), 4 );
return true;
}
void QgsWmsProvider::setConnectionName( QString const &connName )
{
mConnectionName = connName;
}
Qgis::DataProviderFlags QgsWmsProvider::flags() const
{
Qgis::DataProviderFlags res;
if ( mSettings.mXyz )
{
// always consider XYZ tiles as basemap sources
res |= Qgis::DataProviderFlag::IsBasemapSource;
}
return res;
}
void QgsWmsProvider::setLayerOrder( QStringList const &layers )
{
if ( layers.size() != mSettings.mActiveSubLayers.size() )
{
QgsDebugError( QStringLiteral( "Invalid layer list length" ) );
return;
}
QMap<QString, QString> styleMap;
for ( int i = 0; i < mSettings.mActiveSubLayers.size(); i++ )
{
styleMap.insert( mSettings.mActiveSubLayers[i], mSettings.mActiveSubStyles[i] );
}
for ( int i = 0; i < layers.size(); i++ )
{
if ( !styleMap.contains( layers[i] ) )
{
QgsDebugError( QStringLiteral( "Layer %1 not found" ).arg( layers[i] ) );
return;
}
}
mSettings.mActiveSubLayers = layers;
mSettings.mActiveSubStyles.clear();
for ( int i = 0; i < layers.size(); i++ )
{
mSettings.mActiveSubStyles.append( styleMap[ layers[i] ] );
}
}
void QgsWmsProvider::setSubLayerVisibility( QString const &name, bool vis )
{
if ( !mActiveSubLayerVisibility.contains( name ) )
{
QgsDebugError( QStringLiteral( "Layer %1 not found." ).arg( name ) );
return;
}
mActiveSubLayerVisibility[name] = vis;
}
bool QgsWmsProvider::setImageCrs( QString const &crs )
{
QgsDebugMsgLevel( "Setting image CRS to " + crs + '.', 3 );
if ( crs != mImageCrs && !crs.isEmpty() )
{
mExtentDirty = true;
mImageCrs = crs;
}
if ( mSettings.mTiled )
{
if ( mSettings.mActiveSubLayers.size() != 1 )
{
appendError( ERR( tr( "Number of tile layers must be one" ) ) );
return false;
}
QgsDebugMsgLevel( QStringLiteral( "mTileLayersSupported.size() = %1" ).arg( mCaps.mTileLayersSupported.size() ), 2 );
if ( mCaps.mTileLayersSupported.isEmpty() )
{
appendError( ERR( tr( "Tile layer not found" ) ) );
return false;
}
for ( int i = 0; i < mCaps.mTileLayersSupported.size(); i++ )
{
QgsWmtsTileLayer *tl = &mCaps.mTileLayersSupported[i];
if ( tl->identifier != mSettings.mActiveSubLayers[0] )
continue;
if ( mSettings.mTileMatrixSetId.isEmpty() && tl->setLinks.size() == 1 )
{
QString tms = tl->setLinks.constBegin().key();
if ( !mCaps.mTileMatrixSets.contains( tms ) )
{
QgsDebugError( QStringLiteral( "tile matrix set '%1' not found." ).arg( tms ) );
continue;
}
if ( mCaps.mTileMatrixSets[ tms ].crs != mImageCrs )
{
QgsDebugError( QStringLiteral( "tile matrix set '%1' has crs %2 instead of %3." ).arg( tms, mCaps.mTileMatrixSets[ tms ].crs, mImageCrs ) );
continue;
}
// fill in generate matrix for WMS-C
mSettings.mTileMatrixSetId = tms;
}
mTileLayer = tl;
break;
}
mNativeResolutions.clear();
if ( mCaps.mTileMatrixSets.contains( mSettings.mTileMatrixSetId ) )
{
mTileMatrixSet = &mCaps.mTileMatrixSets[ mSettings.mTileMatrixSetId ];
if ( crs.isEmpty() )
{
// if CRS is not specified, use default
mSettings.mCrsId = mTileMatrixSet->crs;
mExtentDirty = true;
mImageCrs = mSettings.mCrsId;
}
if ( mSettings.mImageMimeType.isEmpty() && mTileLayer )
{
// if format is not specified, use first available
mSettings.mImageMimeType = mTileLayer->formats.value( 0 );
}
QList<double> keys = mTileMatrixSet->tileMatrices.keys();
std::sort( keys.begin(), keys.end() );
const auto constKeys = keys;
for ( double key : constKeys )
{
mNativeResolutions << key;
}
if ( !mTileMatrixSet->tileMatrices.empty() )
{
setProperty( "tileWidth", mTileMatrixSet->tileMatrices.first().tileWidth );
setProperty( "tileHeight", mTileMatrixSet->tileMatrices.first().tileHeight );
}
}
else
{
QgsDebugError( QStringLiteral( "Expected tile matrix set '%1' not found." ).arg( mSettings.mTileMatrixSetId ) );
mTileMatrixSet = nullptr;
}
if ( !mTileLayer || !mTileMatrixSet )
{
appendError( ERR( tr( "Tile layer or tile matrix set not found" ) ) );
return false;
}
}
return true;
}
void QgsWmsProvider::setQueryItem( QUrlQuery &url, const QString &item, const QString &value )
{
QString key = QUrl::toPercentEncoding( item );
url.removeQueryItem( key );
if ( value.isNull() )
url.addQueryItem( key, "" );
else
url.addQueryItem( key, QUrl::toPercentEncoding( value ) );
}
void QgsWmsProvider::setFormatQueryItem( QUrlQuery &url )
{
url.removeQueryItem( QStringLiteral( "FORMAT" ) );
if ( mSettings.mImageMimeType.contains( '+' ) )
{
QString format( mSettings.mImageMimeType );
format.replace( '+', QLatin1String( "%2b" ) );
url.addQueryItem( "FORMAT", format );
}
else
setQueryItem( url, QStringLiteral( "FORMAT" ), mSettings.mImageMimeType );
}
static bool _fuzzyContainsRect( const QRectF &r1, const QRectF &r2 )
{
double significantDigits = std::log10( std::max( r1.width(), r1.height() ) );
double epsilon = std::pow( 10.0, significantDigits - 5 ); // floats have 6-9 significant digits
return r1.contains( r2.adjusted( epsilon, epsilon, -epsilon, -epsilon ) );
}
void QgsWmsProvider::fetchOtherResTiles( QgsTileMode tileMode,
const QgsRectangle &viewExtent,
int imageWidth,
QList<QRectF> &missingRects,
double tres,
int resOffset,
QList<TileImage> &otherResTiles,
QgsRasterBlockFeedback *feedback )
{
if ( !mTileMatrixSet )
return; // there is no tile matrix set defined for ordinary WMS (with user-specified tile size)
const QgsWmtsTileMatrix *tmOther = mTileMatrixSet->findOtherResolution( tres, resOffset );
if ( !tmOther )
return;
QSet<TilePosition> tilesSet;
const auto constMissingRects = missingRects;
for ( const QRectF &missingTileRect : constMissingRects )
{
int c0, r0, c1, r1;
tmOther->viewExtentIntersection( QgsRectangle( missingTileRect ), nullptr, c0, r0, c1, r1 );
for ( int row = r0; row <= r1; row++ )
{
for ( int col = c0; col <= c1; col++ )
{
tilesSet << TilePosition( row, col );
}
}
}
// get URLs of tiles because their URLs are used as keys in the tile cache
TilePositions tiles = qgis::setToList( tilesSet );
TileRequests requests;
switch ( tileMode )
{
case WMSC:
createTileRequestsWMSC( tmOther, tiles, requests );
break;
case WMTS:
createTileRequestsWMTS( tmOther, tiles, requests );
break;
case XYZ:
createTileRequestsXYZ( tmOther, tiles, requests, feedback );
break;
}
if ( feedback && feedback->isCanceled() )
return;
QList<QRectF> missingRectsToDelete;
const auto constRequests = requests;
for ( const TileRequest &r : constRequests )
{
if ( feedback && feedback->isCanceled() )
return;
QImage localImage;
if ( ! QgsTileCache::tile( r.url, localImage ) )
continue;
QRectF dst = destinationRect( viewExtent, r.rect, imageWidth );
otherResTiles << TileImage( dst, localImage, false );
// see if there are any missing rects that are completely covered by this tile
const auto constMissingRects = missingRects;
for ( const QRectF &missingRect : constMissingRects )
{
// we need to do a fuzzy "contains" check because the coordinates may not align perfectly
// due to numerical errors and/or transform of coords from double to floats
if ( _fuzzyContainsRect( r.rect, missingRect ) )
{
missingRectsToDelete << missingRect;
}
}
}
if ( feedback && feedback->isCanceled() )
return;
// remove all the rectangles we have completely covered by tiles from this resolution
// so we will not use tiles from multiple resolutions for one missing tile (to save time)
const auto constMissingRectsToDelete = missingRectsToDelete;
for ( const QRectF &rectToDelete : constMissingRectsToDelete )
{
missingRects.removeOne( rectToDelete );
}
QgsDebugMsgLevel( QStringLiteral( "Other resolution tiles: offset %1, res %2, missing rects %3, remaining rects %4, added tiles %5" )
.arg( resOffset )
.arg( tmOther->tres )
.arg( missingRects.count() + missingRectsToDelete.count() )
.arg( missingRects.count() )
.arg( otherResTiles.count() ), 3 );
}
uint qHash( QgsWmsProvider::TilePosition tp )
{
return ( uint ) tp.col + ( ( uint ) tp.row << 16 );
}
static void _drawDebugRect( QPainter &p, const QRectF &rect, const QColor &color )
{
#if 0 // good for debugging how tiles from various resolutions are used
QPainter::CompositionMode oldMode = p.compositionMode();
p.setCompositionMode( QPainter::CompositionMode_SourceOver );
QColor c = color;
c.setAlpha( 100 );
p.fillRect( rect, QBrush( c, Qt::DiagCrossPattern ) );
p.setCompositionMode( oldMode );
#else
Q_UNUSED( p )
Q_UNUSED( rect )
Q_UNUSED( color )
#endif
}
/**
* Resets an image with a buffered image (add 2 pixels on each side) to take account of external pixels considering the resolution,
* Returns the map extent of the buffered image.
*/
static QgsRectangle initializeBufferedImage( const QgsRectangle &viewExtent, double resolution, QImage *image )
{
int pixelX = std::ceil( viewExtent.width() / resolution ) + 4;
int pixelY = std::ceil( viewExtent.height() / resolution ) + 4;
*image = QImage( pixelX, pixelY, QImage::Format_ARGB32 );
image->fill( 0 );
return QgsRectangle( viewExtent.xMinimum() - 2 * resolution,
viewExtent.yMinimum() - 2 * resolution,
viewExtent.xMinimum() + ( image->width() - 2 ) * resolution,
viewExtent.yMinimum() + ( image->height() - 2 ) * resolution );
}
QImage *QgsWmsProvider::draw( const QgsRectangle &viewExtent, int pixelWidth, int pixelHeight, QgsRectangle &effectiveViewExtent, double &sourceResolution, QgsRasterBlockFeedback *feedback )
{
if ( qApp && qApp->thread() == QThread::currentThread() )
{
QgsDebugError( QStringLiteral( "Trying to draw a WMS image on the main thread. Stop it!" ) );
}
// compose the URL query string for the WMS server.
QImage *image = new QImage( pixelWidth, pixelHeight, QImage::Format_ARGB32 );
image->fill( 0 );
int maxWidth = mCaps.mCapabilities.service.maxWidth == 0 ? std::numeric_limits<int>::max() : mCaps.mCapabilities.service.maxWidth;
int maxHeight = mCaps.mCapabilities.service.maxHeight == 0 ? std::numeric_limits<int>::max() : mCaps.mCapabilities.service.maxHeight;
if ( !mSettings.mTiled && mSettings.mMaxWidth == 0 && mSettings.mMaxHeight == 0 && pixelWidth <= maxWidth && pixelHeight <= maxHeight )
{
QUrl url = createRequestUrlWMS( viewExtent, pixelWidth, pixelHeight );
// cache some details for if the user wants to do an identifyAsHtml() later
QgsWmsImageDownloadHandler handler( dataSourceUri(), url, mSettings.authorization(), image, feedback );
handler.downloadBlocking();
}
else
{
mTileReqNo++;
double vres = viewExtent.width() / pixelWidth;
const QgsWmtsTileMatrix *tm = nullptr;
std::unique_ptr<QgsWmtsTileMatrix> tempTm;
enum QgsTileMode tileMode;
if ( mSettings.mTiled )
{
Q_ASSERT( mTileLayer );
Q_ASSERT( mTileMatrixSet );
if ( mTileMatrixSet->tileMatrices.isEmpty() )
{
QgsDebugError( QStringLiteral( "WMTS tile set is empty!" ) );
return image;
}
// if we know both source and output DPI, let's scale the tiles
if ( mDpi != -1 && mTileLayer->dpi != -1 )
{
vres *= static_cast<double>( mDpi ) / mTileLayer->dpi;
}
// find nearest resolution
tm = mTileMatrixSet->findNearestResolution( vres );
Q_ASSERT( tm );
tileMode = mTileLayer->tileMode;
}
else if ( ( mSettings.mMaxWidth != 0 && mSettings.mMaxHeight != 0 ) || pixelWidth > maxWidth || pixelHeight > maxHeight )
{
int w = mSettings.mMaxWidth != 0 && mSettings.mMaxWidth < maxWidth ? mSettings.mMaxWidth : maxWidth;
int h = mSettings.mMaxHeight != 0 && mSettings.mMaxHeight < maxHeight ? mSettings.mMaxHeight : maxHeight;
// this is an ordinary WMS server, but the user requested tiled approach
// so we will pretend it is a WMS-C server with just one tile matrix
tempTm.reset( new QgsWmtsTileMatrix );
tempTm->topLeft = QgsPointXY( mLayerExtent.xMinimum(), mLayerExtent.yMaximum() );
tempTm->tileWidth = w;
tempTm->tileHeight = h;
tempTm->matrixWidth = std::ceil( mLayerExtent.width() / w / vres );
tempTm->matrixHeight = std::ceil( mLayerExtent.height() / h / vres );
tempTm->tres = vres;
tm = tempTm.get();
tileMode = WMSC;
}
else
{
QgsDebugError( QStringLiteral( "empty tile size" ) );
return image;
}
QgsDebugMsgLevel( QStringLiteral( "layer extent: %1,%2,%3,%4 %5x%6" )
.arg( qgsDoubleToString( mLayerExtent.xMinimum() ),
qgsDoubleToString( mLayerExtent.yMinimum() ) )
.arg( qgsDoubleToString( mLayerExtent.xMaximum() ),
qgsDoubleToString( mLayerExtent.yMaximum() ) )
.arg( mLayerExtent.width() )
.arg( mLayerExtent.height() ), 3
);
QgsDebugMsgLevel( QStringLiteral( "view extent: %1,%2,%3,%4 %5x%6 res:%7" )
.arg( qgsDoubleToString( viewExtent.xMinimum() ),
qgsDoubleToString( viewExtent.yMinimum() ) )
.arg( qgsDoubleToString( viewExtent.xMaximum() ),
qgsDoubleToString( viewExtent.yMaximum() ) )
.arg( viewExtent.width() )
.arg( viewExtent.height() )
.arg( vres, 0, 'f' ), 3
);
QgsDebugMsgLevel( QStringLiteral( "tile matrix %1,%2 res:%3 tilesize:%4x%5 matrixsize:%6x%7 id:%8" )
.arg( tm->topLeft.x() ).arg( tm->topLeft.y() ).arg( tm->tres )
.arg( tm->tileWidth ).arg( tm->tileHeight )
.arg( tm->matrixWidth ).arg( tm->matrixHeight )
.arg( tm->identifier ), 3
);
const QgsWmtsTileMatrixLimits *tml = nullptr;
if ( mTileLayer &&
mTileLayer->setLinks.contains( mTileMatrixSet->identifier ) &&
mTileLayer->setLinks[ mTileMatrixSet->identifier ].limits.contains( tm->identifier ) )
{
tml = &mTileLayer->setLinks[ mTileMatrixSet->identifier ].limits[ tm->identifier ];
}
// calculate tile coordinates
int col0, col1, row0, row1;
if ( mConverter && mProviderResamplingEnabled ) // if resampling we need some exterior pixel depending of the algorithm, max is 2 with cubic resampling
tm->viewExtentIntersection( viewExtent.buffered( tm->tres * 2 ), tml, col0, row0, col1, row1 );
else
tm->viewExtentIntersection( viewExtent, tml, col0, row0, col1, row1 );
#ifdef QGISDEBUG
int n = ( col1 - col0 + 1 ) * ( row1 - row0 + 1 );
QgsDebugMsgLevel( QStringLiteral( "tile number: %1x%2 = %3" ).arg( col1 - col0 + 1 ).arg( row1 - row0 + 1 ).arg( n ), 3 );
if ( n > 256 && !mSettings.mIsMBTiles )
{
emit statusChanged( QStringLiteral( "current view would need %1 tiles. tile request per draw limited to 256." ).arg( n ) );
return image;
}
#endif
TilePositions tiles;
for ( int row = row0; row <= row1; row++ )
{
for ( int col = col0; col <= col1; col++ )
{
tiles << TilePosition( row, col );
}
}
TileRequests requests;
switch ( tileMode )
{
case WMSC:
createTileRequestsWMSC( tm, tiles, requests );
break;
case WMTS:
createTileRequestsWMTS( tm, tiles, requests );
break;
case XYZ:
createTileRequestsXYZ( tm, tiles, requests, feedback );
break;
default:
QgsDebugError( QStringLiteral( "unexpected tile mode %1" ).arg( mTileLayer->tileMode ) );
return image;
}
if ( feedback && feedback->isCanceled() )
return image;
QList<TileImage> tileImages; // in the correct resolution
QList<QRectF> missing; // rectangles (in map coords) of missing tiles for this view
std::unique_ptr<QgsMbTiles> mbtilesReader;
if ( mSettings.mIsMBTiles )
{
mbtilesReader.reset( new QgsMbTiles( QUrl( mSettings.mBaseUrl ).path() ) );
mbtilesReader->open();
}
QElapsedTimer t;
t.start();
TileRequests requestsFinal;
effectiveViewExtent = viewExtent;
const auto constRequests = requests;
for ( const TileRequest &r : constRequests )
{
if ( feedback && feedback->isCanceled() )
return image;
QImage localImage;
if ( mbtilesReader && !QgsTileCache::tile( r.url, localImage ) )
{
QUrlQuery query( r.url );
QImage img = mbtilesReader->tileDataAsImage( query.queryItemValue( "z" ).toInt(),
query.queryItemValue( "x" ).toInt(),