/
qgswmsprovider.cpp
4090 lines (3436 loc) · 123 KB
/
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
***************************************************************************/
/***************************************************************************
* *
* 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 <typeinfo>
// time to wait for an answer without emitting dataChanged()
#define WMS_THRESHOLD 200
#include "qgslogger.h"
#include "qgswmsprovider.h"
#include "qgswmsconnection.h"
#include "qgscoordinatetransform.h"
#include "qgsdatasourceuri.h"
#include "qgsrasterlayer.h"
#include "qgsrectangle.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsnetworkaccessmanager.h"
#include "qgsmessageoutput.h"
#include "qgsmessagelog.h"
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QNetworkProxy>
#if QT_VERSION >= 0x40500
#include <QNetworkDiskCache>
#endif
#include <QUrl>
#include <QIcon>
#include <QImage>
#include <QImageReader>
#include <QPainter>
#include <QPixmap>
#include <QSet>
#include <QSettings>
#include <QEventLoop>
#include <QCoreApplication>
#include <QTime>
#ifdef QGISDEBUG
#include <QFile>
#include <QDir>
#endif
static QString WMS_KEY = "wms";
static QString WMS_DESCRIPTION = "OGC Web Map Service version 1.3 data provider";
static QString DEFAULT_LATLON_CRS = "CRS:84";
QgsWmsProvider::QgsWmsProvider( QString const &uri )
: QgsRasterDataProvider( uri )
, mHttpUri( uri )
, mHttpCapabilitiesResponse( 0 )
, mImageCrs( DEFAULT_LATLON_CRS )
, mCachedImage( 0 )
, mCacheReply( 0 )
, mCachedViewExtent( 0 )
, mCoordinateTransform( 0 )
, mExtentDirty( true )
, mGetFeatureInfoUrlBase( "" )
, mLayerCount( -1 )
, mTileReqNo( 0 )
, mCacheHits( 0 )
, mCacheMisses( 0 )
, mErrors( 0 )
, mUserName( QString::null )
, mPassword( QString::null )
, mTiled( false )
, mTileLayer( 0 )
, mTileMatrixSetId( QString::null )
, mTileMatrixSet( 0 )
, mFeatureCount( 0 )
{
QgsDebugMsg( "constructing with uri '" + mHttpUri + "'." );
// assume this is a valid layer until we determine otherwise
mValid = true;
// 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...
parseUri( uri );
// 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
mSupportedGetFeatureFormats = QStringList() << "text/html" << "text/plain" << "text/xml";
QgsDebugMsg( "exiting constructor." );
}
void QgsWmsProvider::parseUri( QString uriString )
{
QgsDebugMsg( "uriString = " + uriString );
QgsDataSourceURI uri;
uri.setEncodedUri( uriString );
mTiled = false;
mTileMatrixSet = 0;
mTileLayer = 0;
mTileDimensionValues.clear();
mMaxWidth = 0;
mMaxHeight = 0;
mHttpUri = uri.param( "url" );
mBaseUrl = prepareUri( mHttpUri ); // must set here, setImageCrs is using that
QgsDebugMsg( "mBaseUrl = " + mBaseUrl );
mIgnoreGetMapUrl = uri.hasParam( "IgnoreGetMapUrl" );
mIgnoreGetFeatureInfoUrl = uri.hasParam( "IgnoreGetFeatureInfoUrl" );
mIgnoreAxisOrientation = uri.hasParam( "IgnoreAxisOrientation" ); // must be before parsing!
mInvertAxisOrientation = uri.hasParam( "InvertAxisOrientation" ); // must be before parsing!
mUserName = uri.param( "username" );
QgsDebugMsg( "set username to " + mUserName );
mPassword = uri.param( "password" );
QgsDebugMsg( "set password to " + mPassword );
addLayers( uri.params( "layers" ), uri.params( "styles" ) );
setImageEncoding( uri.param( "format" ) );
if ( uri.hasParam( "maxWidth" ) && uri.hasParam( "maxHeight" ) )
{
mMaxWidth = uri.param( "maxWidth" ).toInt();
mMaxHeight = uri.param( "maxHeight" ).toInt();
}
if ( uri.hasParam( "tileMatrixSet" ) )
{
mTiled = true;
// tileMatrixSet may be empty if URI was converted from < 1.9 project file URI
// in that case it means that the source is WMS-C
mTileMatrixSetId = uri.param( "tileMatrixSet" );
}
if ( uri.hasParam( "tileDimensions" ) )
{
mTiled = true;
foreach ( QString param, uri.params( "tileDimensions" ) )
{
QStringList kv = param.split( "=" );
if ( kv.size() == 1 )
{
mTileDimensionValues.insert( kv[0], QString::null );
}
else if ( kv.size() == 2 )
{
mTileDimensionValues.insert( kv[0], kv[1] );
}
else
{
QgsDebugMsg( QString( "skipped dimension %1" ).arg( param ) );
}
}
}
// setImageCrs is using mTiled !!!
setImageCrs( uri.param( "crs" ) );
mCrs.createFromOgcWmsCrs( uri.param( "crs" ) );
mFeatureCount = uri.param( "featureCount" ).toInt(); // default to 0
}
QString QgsWmsProvider::prepareUri( QString uri ) const
{
if ( uri.contains( "SERVICE=WMTS" ) || uri.contains( "/WMTSCapabilities.xml" ) )
{
return uri;
}
if ( !uri.contains( "?" ) )
{
uri.append( "?" );
}
else if ( uri.right( 1 ) != "?" && uri.right( 1 ) != "&" )
{
uri.append( "&" );
}
return uri;
}
QgsWmsProvider::~QgsWmsProvider()
{
QgsDebugMsg( "deconstructing." );
// Dispose of any cached image as created by draw()
if ( mCachedImage )
{
delete mCachedImage;
mCachedImage = 0;
}
if ( mCoordinateTransform )
{
delete mCoordinateTransform;
mCoordinateTransform = 0;
}
if ( mCacheReply )
{
mCacheReply->deleteLater();
mCacheReply = 0;
}
while ( !mTileReplies.isEmpty() )
{
mTileReplies.takeFirst()->deleteLater();
}
}
QgsRasterInterface * QgsWmsProvider::clone() const
{
QgsWmsProvider * provider = new QgsWmsProvider( dataSourceUri() );
return provider;
}
bool QgsWmsProvider::supportedLayers( QVector<QgsWmsLayerProperty> &layers )
{
QgsDebugMsg( "Entering." );
// Allow the provider to collect the capabilities first.
if ( !retrieveServerCapabilities() )
{
return false;
}
layers = mLayersSupported;
QgsDebugMsg( "Exiting." );
return true;
}
bool QgsWmsProvider::supportedTileLayers( QList<QgsWmtsTileLayer> &layers )
{
QgsDebugMsg( "Entering." );
// Allow the provider to collect the capabilities first.
if ( !retrieveServerCapabilities() )
{
return false;
}
layers = mTileLayersSupported;
QgsDebugMsg( "Exiting." );
return true;
}
bool QgsWmsProvider::supportedTileMatrixSets( QHash<QString, QgsWmtsTileMatrixSet> &tileMatrixSets )
{
QgsDebugMsg( "Entering." );
// Allow the provider to collect the capabilities first.
if ( !retrieveServerCapabilities() )
{
return false;
}
tileMatrixSets = mTileMatrixSets;
QgsDebugMsg( "Exiting." );
return true;
}
size_t QgsWmsProvider::layerCount() const
{
return 1; // XXX properly return actual number of layers
} // QgsWmsProvider::layerCount()
QString QgsWmsProvider::baseUrl() const
{
return mBaseUrl;
}
QString QgsWmsProvider::getMapUrl() const
{
return mCapabilities.capability.request.getMap.dcpType.size() == 0
? mBaseUrl
: prepareUri( mCapabilities.capability.request.getMap.dcpType.front().http.get.onlineResource.xlinkHref );
}
QString QgsWmsProvider::getFeatureInfoUrl() const
{
return mCapabilities.capability.request.getFeatureInfo.dcpType.size() == 0
? mBaseUrl
: prepareUri( mCapabilities.capability.request.getFeatureInfo.dcpType.front().http.get.onlineResource.xlinkHref );
}
QString QgsWmsProvider::getTileUrl() const
{
if ( mCapabilities.capability.request.getTile.dcpType.size() == 0 ||
( mCapabilities.capability.request.getTile.allowedEncodings.size() > 0 &&
!mCapabilities.capability.request.getTile.allowedEncodings.contains( "KVP" ) ) )
{
return QString::null;
}
else
{
return prepareUri( mCapabilities.capability.request.getTile.dcpType.front().http.get.onlineResource.xlinkHref );
}
}
void QgsWmsProvider::addLayers( QStringList const &layers,
QStringList const &styles )
{
QgsDebugMsg( "Entering: layers:" + layers.join( ", " ) + ", styles:" + styles.join( ", " ) );
if ( layers.size() != styles.size() )
{
QgsMessageLog::logMessage( tr( "Number of layers and styles don't match" ), tr( "WMS" ) );
mValid = false;
return;
}
// TODO: Make mActiveSubLayers a std::map in order to avoid duplicates
mActiveSubLayers += layers;
mActiveSubStyles += styles;
// Set the visibility of these new layers on by default
foreach ( const QString &layer, layers )
{
mActiveSubLayerVisibility[ layer ] = true;
QgsDebugMsg( "set visibility of layer '" + layer + "' to true." );
}
// now that the layers have changed, the extent will as well.
mExtentDirty = true;
if ( mTiled )
mTileLayer = 0;
QgsDebugMsg( "Exiting." );
}
void QgsWmsProvider::setConnectionName( QString const &connName )
{
mConnectionName = connName;
}
void QgsWmsProvider::setLayerOrder( QStringList const &layers )
{
QgsDebugMsg( "Entering." );
mActiveSubLayers = layers;
QgsDebugMsg( "Exiting." );
}
void QgsWmsProvider::setSubLayerVisibility( QString const & name, bool vis )
{
mActiveSubLayerVisibility[name] = vis;
}
QString QgsWmsProvider::imageEncoding() const
{
return mImageMimeType;
}
void QgsWmsProvider::setImageEncoding( QString const & mimeType )
{
QgsDebugMsg( "Setting image encoding to " + mimeType + "." );
mImageMimeType = mimeType;
}
void QgsWmsProvider::setImageCrs( QString const & crs )
{
QgsDebugMsg( "Setting image CRS to " + crs + "." );
if ( crs != mImageCrs && !crs.isEmpty() )
{
// delete old coordinate transform as it is no longer valid
if ( mCoordinateTransform )
{
delete mCoordinateTransform;
mCoordinateTransform = 0;
}
mExtentDirty = true;
mImageCrs = crs;
}
if ( mTiled )
{
if ( mActiveSubLayers.size() != 1 )
{
QgsDebugMsg( "Number of tile layers must be one" );
mValid = false;
return;
}
mValid = retrieveServerCapabilities();
QgsDebugMsg( QString( "mValid = %1 mTileLayersSupported.size() = %2" ).arg( mValid ).arg( mTileLayersSupported.size() ) );
if ( !mValid || mTileLayersSupported.size() == 0 )
{
QgsDebugMsg( "Tile layer not found" );
return;
}
for ( int i = 0; i < mTileLayersSupported.size(); i++ )
{
QgsWmtsTileLayer *tl = &mTileLayersSupported[i];
if ( tl->identifier != mActiveSubLayers[0] )
continue;
if ( mTileMatrixSetId.isEmpty() && tl->setLinks.size() == 1 )
{
QString tms = tl->setLinks.keys()[0];
if ( !mTileMatrixSets.contains( tms ) )
{
QgsDebugMsg( QString( "tile matrix set '%1' not found." ).arg( tms ) );
continue;
}
if ( mTileMatrixSets[ tms ].crs != mImageCrs )
{
QgsDebugMsg( QString( "tile matrix set '%1' has crs %2 instead of %3." ).arg( tms ).arg( mTileMatrixSets[ tms ].crs ).arg( mImageCrs ) );
continue;
}
// fill in generate matrix for WMS-C
mTileMatrixSetId = tms;
}
mTileLayer = tl;
break;
}
QList<QVariant> resolutions;
if ( mTileMatrixSets.contains( mTileMatrixSetId ) )
{
mTileMatrixSet = &mTileMatrixSets[ mTileMatrixSetId ];
QList<double> keys = mTileMatrixSet->tileMatrices.keys();
qSort( keys );
foreach ( double key, keys )
{
resolutions << key;
}
}
else
{
QgsDebugMsg( QString( "Expected tile matrix set '%1' not found." ).arg( mTileMatrixSetId ) );
mTileMatrixSet = 0;
}
setProperty( "resolutions", resolutions );
mValid = mTileLayer != 0 && mTileMatrixSet != 0;
}
}
void QgsWmsProvider::setQueryItem( QUrl &url, QString item, QString value )
{
url.removeQueryItem( item );
url.addQueryItem( item, value );
}
QImage *QgsWmsProvider::draw( QgsRectangle const &viewExtent, int pixelWidth, int pixelHeight )
{
QgsDebugMsg( "Entering." );
if ( !retrieveServerCapabilities() )
{
return 0;
}
// Can we reuse the previously cached image?
if ( mCachedImage &&
mCachedViewExtent == viewExtent &&
mCachedViewWidth == pixelWidth &&
mCachedViewHeight == pixelHeight )
{
return mCachedImage;
}
// delete cached image and create network request(s) to fill it
if ( mCachedImage )
{
delete mCachedImage;
mCachedImage = 0;
}
// abort running (untiled) request
if ( mCacheReply )
{
mCacheReply->abort();
delete mCacheReply;
mCacheReply = 0;
}
//according to the WMS spec for 1.3, some CRS have inverted axis
bool changeXY = false;
if ( !mIgnoreAxisOrientation && ( mCapabilities.version == "1.3.0" || mCapabilities.version == "1.3" ) )
{
//create CRS from string
QgsCoordinateReferenceSystem theSrs;
if ( theSrs.createFromOgcWmsCrs( mImageCrs ) && theSrs.axisInverted() )
{
changeXY = true;
}
}
if ( mInvertAxisOrientation )
changeXY = !changeXY;
// compose the URL query string for the WMS server.
QString crsKey = "SRS"; //SRS in 1.1.1 and CRS in 1.3.0
if ( mCapabilities.version == "1.3.0" || mCapabilities.version == "1.3" )
{
crsKey = "CRS";
}
// Bounding box in WMS format (Warning: does not work with scientific notation)
QString bbox = QString( changeXY ? "%2,%1,%4,%3" : "%1,%2,%3,%4" )
.arg( viewExtent.xMinimum(), 0, 'f', 16 )
.arg( viewExtent.yMinimum(), 0, 'f', 16 )
.arg( viewExtent.xMaximum(), 0, 'f', 16 )
.arg( viewExtent.yMaximum(), 0, 'f', 16 );
mCachedImage = new QImage( pixelWidth, pixelHeight, QImage::Format_ARGB32 );
mCachedImage->fill( 0 );
mCachedViewExtent = viewExtent;
mCachedViewWidth = pixelWidth;
mCachedViewHeight = pixelHeight;
QSettings s;
bool bkLayerCaching = s.value( "/qgis/enable_render_caching", false ).toBool();
if ( !mTiled && !mMaxWidth && !mMaxHeight )
{
// Calculate active layers that are also visible.
QgsDebugMsg( "Active layer list of " + mActiveSubLayers.join( ", " )
+ " and style list of " + mActiveSubStyles.join( ", " ) );
QStringList visibleLayers = QStringList();
QStringList visibleStyles = QStringList();
QStringList::Iterator it2 = mActiveSubStyles.begin();
for ( QStringList::Iterator it = mActiveSubLayers.begin();
it != mActiveSubLayers.end();
++it )
{
if ( mActiveSubLayerVisibility.find( *it ).value() )
{
visibleLayers += *it;
visibleStyles += *it2;
}
++it2;
}
QString layers = visibleLayers.join( "," );
QString styles = visibleStyles.join( "," );
QgsDebugMsg( "Visible layer list of " + layers + " and style list of " + styles );
QUrl url( mIgnoreGetMapUrl ? mBaseUrl : getMapUrl() );
setQueryItem( url, "SERVICE", "WMS" );
setQueryItem( url, "VERSION", mCapabilities.version );
setQueryItem( url, "REQUEST", "GetMap" );
setQueryItem( url, "BBOX", bbox );
setQueryItem( url, crsKey, mImageCrs );
setQueryItem( url, "WIDTH", QString::number( pixelWidth ) );
setQueryItem( url, "HEIGHT", QString::number( pixelHeight ) );
setQueryItem( url, "LAYERS", layers );
setQueryItem( url, "STYLES", styles );
setQueryItem( url, "FORMAT", mImageMimeType );
//DPI parameter is accepted by QGIS mapserver (and ignored by the other WMS servers)
//map_resolution parameter works for UMN mapserver
//Different WMS servers have DPI parameters:
if ( mDpi != -1 )
{
setQueryItem( url, "DPI", QString::number( mDpi ) ); //QGIS server
setQueryItem( url, "MAP_RESOLUTION", QString::number( mDpi ) ); //UMN mapserver
setQueryItem( url, "FORMAT_OPTIONS", QString( "dpi:%1" ).arg( mDpi ) ); //geoserver
}
//MH: jpeg does not support transparency and some servers complain if jpg and transparent=true
if ( !mImageMimeType.contains( "jpeg", Qt::CaseInsensitive ) &&
!mImageMimeType.contains( "jpg", Qt::CaseInsensitive ) )
{
setQueryItem( url, "TRANSPARENT", "TRUE" ); // some servers giving error for 'true' (lowercase)
}
QgsDebugMsg( QString( "getmap: %1" ).arg( url.toString() ) );
// cache some details for if the user wants to do an identifyAsHtml() later
mGetFeatureInfoUrlBase = mIgnoreGetFeatureInfoUrl ? mBaseUrl : getFeatureInfoUrl();
QNetworkRequest request( url );
setAuthorization( request );
request.setAttribute( QNetworkRequest::CacheSaveControlAttribute, true );
mCacheReply = QgsNetworkAccessManager::instance()->get( request );
connect( mCacheReply, SIGNAL( finished() ), this, SLOT( cacheReplyFinished() ) );
connect( mCacheReply, SIGNAL( downloadProgress( qint64, qint64 ) ), this, SLOT( cacheReplyProgress( qint64, qint64 ) ) );
emit statusChanged( tr( "Getting map via WMS." ) );
mWaiting = true;
QTime t;
t.start();
while ( mCacheReply && ( !bkLayerCaching || t.elapsed() < WMS_THRESHOLD ) )
{
QCoreApplication::processEvents( QEventLoop::ExcludeUserInputEvents, WMS_THRESHOLD );
}
mWaiting = false;
}
else
{
mTileReqNo++;
double vres = viewExtent.width() / pixelWidth;
double tres = vres;
const QgsWmtsTileMatrix *tm = 0;
enum QgsTileMode tileMode;
if ( mTiled )
{
Q_ASSERT( mTileLayer );
Q_ASSERT( mTileMatrixSet );
Q_ASSERT( mTileMatrixSet->tileMatrices.size() > 0 );
QMap<double, QgsWmtsTileMatrix> &m = mTileMatrixSet->tileMatrices;
// find nearest resolution
QMap<double, QgsWmtsTileMatrix>::const_iterator prev, it = m.constBegin();
while ( it != m.constEnd() && it.key() < vres )
{
QgsDebugMsg( QString( "res:%1 >= %2" ).arg( it.key() ).arg( vres ) );
prev = it;
it++;
}
if ( it == m.constEnd() ||
( it != m.constBegin() && vres - prev.key() < it.key() - vres ) )
{
QgsDebugMsg( "back to previous res" );
it = prev;
}
tres = it.key();
tm = &it.value();
tileMode = mTileLayer->tileMode;
}
else
{
static QgsWmtsTileMatrix tempTm;
tempTm.topLeft = QgsPoint( mLayerExtent.xMinimum(), mLayerExtent.yMaximum() );
tempTm.tileWidth = mMaxWidth;
tempTm.tileHeight = mMaxHeight;
tempTm.matrixWidth = ceil( mLayerExtent.width() / mMaxWidth / vres );
tempTm.matrixHeight = ceil( mLayerExtent.height() / mMaxHeight / vres );
tm = &tempTm;
tileMode = WMSC;
}
QgsDebugMsg( QString( "layer extent: %1,%2 %3x%4" )
.arg( mLayerExtent.xMinimum(), 0, 'f' )
.arg( mLayerExtent.yMinimum(), 0, 'f' )
.arg( mLayerExtent.width() )
.arg( mLayerExtent.height() )
);
QgsDebugMsg( QString( "view extent: %1,%2 %3x%4 res:%5" )
.arg( viewExtent.xMinimum(), 0, 'f' )
.arg( viewExtent.yMinimum(), 0, 'f' )
.arg( viewExtent.width() )
.arg( viewExtent.height() )
.arg( vres, 0, 'f' )
);
QgsDebugMsg( QString( "tile matrix %1,%2 res:%3 tilesize:%4x%5 matrixsize:%6x%7 id:%8" )
.arg( tm->topLeft.x() ).arg( tm->topLeft.y() ).arg( tres )
.arg( tm->tileWidth ).arg( tm->tileHeight )
.arg( tm->matrixWidth ).arg( tm->matrixHeight )
.arg( tm->identifier )
);
// calculate tile coordinates
double twMap = tm->tileWidth * tres;
double thMap = tm->tileHeight * tres;
QgsDebugMsg( QString( "tile map size: %1,%2" ).arg( twMap, 0, 'f' ).arg( thMap, 0, 'f' ) );
int minTileCol = 0;
int maxTileCol = tm->matrixWidth - 1;
int minTileRow = 0;
int maxTileRow = tm->matrixHeight - 1;
if ( mTileLayer &&
mTileLayer->setLinks.contains( mTileMatrixSet->identifier ) &&
mTileLayer->setLinks[ mTileMatrixSet->identifier ].limits.contains( tm->identifier ) )
{
const QgsWmtsTileMatrixLimits &tml = mTileLayer->setLinks[ mTileMatrixSet->identifier ].limits[ tm->identifier ];
minTileCol = tml.minTileCol;
maxTileCol = tml.maxTileCol;
minTileRow = tml.minTileRow;
maxTileRow = tml.maxTileRow;
QgsDebugMsg( QString( "%1 %2: TileMatrixLimits col %3-%4 row %5-%6" )
.arg( mTileMatrixSet->identifier )
.arg( tm->identifier )
.arg( minTileCol ).arg( maxTileCol )
.arg( minTileRow ).arg( maxTileRow ) );
}
int col0 = qBound( minTileCol, ( int ) floor(( viewExtent.xMinimum() - tm->topLeft.x() ) / twMap ), maxTileCol );
int row0 = qBound( minTileRow, ( int ) floor(( tm->topLeft.y() - viewExtent.yMaximum() ) / thMap ), maxTileRow );
int col1 = qBound( minTileCol, ( int ) floor(( viewExtent.xMaximum() - tm->topLeft.x() ) / twMap ), maxTileCol );
int row1 = qBound( minTileRow, ( int ) floor(( tm->topLeft.y() - viewExtent.yMinimum() ) / thMap ), maxTileRow );
#if QGISDEBUG
int n = ( col1 - col0 + 1 ) * ( row1 - row0 + 1 );
QgsDebugMsg( QString( "tile number: %1x%2 = %3" ).arg( col1 - col0 + 1 ).arg( row1 - row0 + 1 ).arg( n ) );
if ( n > 100 )
{
emit statusChanged( QString( "current view would need %1 tiles. tile request per draw limited to 100." ).arg( n ) );
return mCachedImage;
}
#endif
switch ( tileMode )
{
case WMSC:
{
// add WMS request
QUrl url( mIgnoreGetMapUrl ? mBaseUrl : getMapUrl() );
setQueryItem( url, "SERVICE", "WMS" );
setQueryItem( url, "VERSION", mCapabilities.version );
setQueryItem( url, "REQUEST", "GetMap" );
setQueryItem( url, "WIDTH", QString::number( tm->tileWidth ) );
setQueryItem( url, "HEIGHT", QString::number( tm->tileHeight ) );
setQueryItem( url, "LAYERS", mActiveSubLayers.join( "," ) );
setQueryItem( url, "STYLES", mActiveSubStyles.join( "," ) );
setQueryItem( url, "FORMAT", mImageMimeType );
setQueryItem( url, crsKey, mImageCrs );
if ( mTiled )
setQueryItem( url, "TILED", "true" );
int i = 0;
for ( int row = row0; row <= row1; row++ )
{
for ( int col = col0; col <= col1; col++ )
{
QString turl;
turl += url.toString();
turl += QString( changeXY ? "&BBOX=%2,%1,%4,%3" : "&BBOX=%1,%2,%3,%4" )
.arg( tm->topLeft.x() + col * twMap /* + twMap * 0.001 */, 0, 'f', 16 )
.arg( tm->topLeft.y() - ( row + 1 ) * thMap /* - thMap * 0.001 */, 0, 'f', 16 )
.arg( tm->topLeft.x() + ( col + 1 ) * twMap /* - twMap * 0.001 */, 0, 'f', 16 )
.arg( tm->topLeft.y() - row * thMap /* + thMap * 0.001 */, 0, 'f', 16 );
QNetworkRequest request( turl );
setAuthorization( request );
QgsDebugMsg( QString( "tileRequest %1 %2/%3 (%4,%5): %6" ).arg( mTileReqNo ).arg( i++ ).arg( n ).arg( row ).arg( col ).arg( turl ) );
request.setAttribute( QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache );
request.setAttribute( QNetworkRequest::CacheSaveControlAttribute, true );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 0 ), mTileReqNo );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 1 ), i );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 2 ),
QRectF( tm->topLeft.x() + col * twMap, tm->topLeft.y() - ( row + 1 ) * thMap, twMap, thMap ) );
QgsDebugMsg( QString( "gettile: %1" ).arg( turl ) );
QNetworkReply *reply = QgsNetworkAccessManager::instance()->get( request );
mTileReplies << reply;
connect( reply, SIGNAL( finished() ), this, SLOT( tileReplyFinished() ) );
}
}
}
break;
case WMTS:
{
if ( !getTileUrl().isNull() )
{
// KVP
QUrl url( getTileUrl() );
// compose static request arguments.
setQueryItem( url, "SERVICE", "WMTS" );
setQueryItem( url, "REQUEST", "GetTile" );
setQueryItem( url, "VERSION", mCapabilities.version );
setQueryItem( url, "LAYER", mActiveSubLayers[0] );
setQueryItem( url, "STYLE", mActiveSubStyles[0] );
setQueryItem( url, "FORMAT", mImageMimeType );
setQueryItem( url, "TILEMATRIXSET", mTileMatrixSet->identifier );
setQueryItem( url, "TILEMATRIX", tm->identifier );
for ( QHash<QString, QString>::const_iterator it = mTileDimensionValues.constBegin(); it != mTileDimensionValues.constEnd(); ++it )
{
setQueryItem( url, it.key(), it.value() );
}
url.removeQueryItem( "TILEROW" );
url.removeQueryItem( "TILECOL" );
int i = 0;
for ( int row = row0; row <= row1; row++ )
{
for ( int col = col0; col <= col1; col++ )
{
QString turl;
turl += url.toString();
turl += QString( "&TILEROW=%1&TILECOL=%2" ).arg( row ).arg( col );
QNetworkRequest request( turl );
setAuthorization( request );
QgsDebugMsg( QString( "tileRequest %1 %2/%3 (%4,%5): %6" ).arg( mTileReqNo ).arg( i++ ).arg( n ).arg( row ).arg( col ).arg( turl ) );
request.setAttribute( QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache );
request.setAttribute( QNetworkRequest::CacheSaveControlAttribute, true );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 0 ), mTileReqNo );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 1 ), i );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 2 ),
QRectF( tm->topLeft.x() + col * twMap, tm->topLeft.y() - ( row + 1 ) * thMap, twMap, thMap ) );
QgsDebugMsg( QString( "gettile: %1" ).arg( turl ) );
QNetworkReply *reply = QgsNetworkAccessManager::instance()->get( request );
mTileReplies << reply;
connect( reply, SIGNAL( finished() ), this, SLOT( tileReplyFinished() ) );
}
}
}
else
{
// REST
QString url = mTileLayer->getTileURLs[ mImageMimeType ];
url.replace( "{style}", mActiveSubStyles[0], Qt::CaseInsensitive );
url.replace( "{tilematrixset}", mTileMatrixSet->identifier, Qt::CaseInsensitive );
url.replace( "{tilematrix}", tm->identifier, Qt::CaseInsensitive );
for ( QHash<QString, QString>::const_iterator it = mTileDimensionValues.constBegin(); it != mTileDimensionValues.constEnd(); ++it )
{
url.replace( "{" + it.key() + "}", it.value(), Qt::CaseInsensitive );
}
int i = 0;
for ( int row = row0; row <= row1; row++ )
{
for ( int col = col0; col <= col1; col++ )
{
QString turl( url );
turl.replace( "{tilerow}", QString::number( row ), Qt::CaseInsensitive );
turl.replace( "{tilecol}", QString::number( col ), Qt::CaseInsensitive );
QNetworkRequest request( turl );
setAuthorization( request );
QgsDebugMsg( QString( "tileRequest %1 %2/%3 (%4,%5): %6" ).arg( mTileReqNo ).arg( i++ ).arg( n ).arg( row ).arg( col ).arg( turl ) );
request.setAttribute( QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache );
request.setAttribute( QNetworkRequest::CacheSaveControlAttribute, true );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 0 ), mTileReqNo );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 1 ), i );
request.setAttribute( static_cast<QNetworkRequest::Attribute>( QNetworkRequest::User + 2 ),
QRectF( tm->topLeft.x() + col * twMap, tm->topLeft.y() - ( row + 1 ) * thMap, twMap, thMap ) );
QgsDebugMsg( QString( "gettile: %1" ).arg( turl ) );
QNetworkReply *reply = QgsNetworkAccessManager::instance()->get( request );
mTileReplies << reply;
connect( reply, SIGNAL( finished() ), this, SLOT( tileReplyFinished() ) );
}
}
}
}
break;
default:
QgsDebugMsg( QString( "unexpected tile mode %1" ).arg( mTileLayer->tileMode ) );
return mCachedImage;
break;
}
emit statusChanged( tr( "Getting tiles." ) );
mWaiting = true;
QTime t;
t.start();
// draw everything that is retrieved within a second
// and the rest asynchronously
while ( !mTileReplies.isEmpty() && ( !bkLayerCaching || t.elapsed() < WMS_THRESHOLD ) )
{
QCoreApplication::processEvents( QEventLoop::ExcludeUserInputEvents, WMS_THRESHOLD );
}
mWaiting = false;
#ifdef QGISDEBUG
emit statusChanged( tr( "%n tile requests in background", "tile request count", mTileReplies.count() )
+ tr( ", %n cache hits", "tile cache hits", mCacheHits )
+ tr( ", %n cache misses.", "tile cache missed", mCacheMisses )
+ tr( ", %n errors.", "errors", mErrors )
);
#endif
}
return mCachedImage;
}
//void QgsWmsProvider::readBlock( int bandNo, QgsRectangle const & viewExtent, int pixelWidth, int pixelHeight, QgsCoordinateReferenceSystem theSrcCRS, QgsCoordinateReferenceSystem theDestCRS, void *block )
void QgsWmsProvider::readBlock( int bandNo, QgsRectangle const & viewExtent, int pixelWidth, int pixelHeight, void *block )
{
Q_UNUSED( bandNo );
QgsDebugMsg( "Entered" );
// TODO: optimize to avoid writing to QImage
QImage* image = draw( viewExtent, pixelWidth, pixelHeight );
if ( ! image ) // should not happen
{
QgsMessageLog::logMessage( tr( "image is NULL" ), tr( "WMS" ) );
return;
}
QgsDebugMsg( QString( "image height = %1 bytesPerLine = %2" ).arg( image->height() ) . arg( image->bytesPerLine() ) ) ;
size_t myExpectedSize = pixelWidth * pixelHeight * 4;
size_t myImageSize = image->height() * image->bytesPerLine();
if ( myExpectedSize != myImageSize ) // should not happen
{
QgsMessageLog::logMessage( tr( "unexpected image size" ), tr( "WMS" ) );
return;
}
uchar * ptr = image->bits() ;
if ( ptr )
{
// If image is too large, ptr can be NULL
memcpy( block, ptr, myExpectedSize );
}
// do not delete the image, it is handled by draw()
//delete image;
}
void QgsWmsProvider::tileReplyFinished()
{
QNetworkReply *reply = qobject_cast<QNetworkReply*>( sender() );
#if defined(QGISDEBUG) && (QT_VERSION >= 0x40500)
bool fromCache = reply->attribute( QNetworkRequest::SourceIsFromCacheAttribute ).toBool();
if ( fromCache )
mCacheHits++;
else
mCacheMisses++;
#endif
#if defined(QGISDEBUG) && (QT_VERSION >= 0x40700)
QgsDebugMsgLevel( "raw headers:", 3 );
foreach ( const QNetworkReply::RawHeaderPair &pair, reply->rawHeaderPairs() )
{
QgsDebugMsgLevel( QString( " %1:%2" )
.arg( QString::fromUtf8( pair.first ) )
.arg( QString::fromUtf8( pair.second ) ), 3 );
}
#endif