/
qgswmsserver.cpp
2007 lines (1761 loc) · 65.4 KB
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qgswmsserver.cpp
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/***************************************************************************
qgswmsserver.cpp
-------------------
begin : May 14, 2006
copyright : (C) 2006 by Marco Hugentobler & Ionut Iosifescu Enescu
email : marco dot hugentobler at karto dot baug dot ethz dot ch
***************************************************************************/
/***************************************************************************
* *
* 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 "qgswmsserver.h"
#include "qgsconfigparser.h"
#include "qgscrscache.h"
#include "qgsfield.h"
#include "qgsgeometry.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaprenderer.h"
#include "qgsmaptopixel.h"
#include "qgspallabeling.h"
#include "qgsproject.h"
#include "qgsrasterlayer.h"
#include "qgsscalecalculator.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgslogger.h"
#include "qgsmapserviceexception.h"
#include "qgssldparser.h"
#include "qgssymbol.h"
#include "qgssymbolv2.h"
#include "qgsrenderer.h"
#include "qgsrendererv2.h"
#include "qgslegendmodel.h"
#include "qgscomposerlegenditem.h"
#include "qgspaintenginehack.h"
#include <QImage>
#include <QPainter>
#include <QStringList>
#include <QTextStream>
#include <QDir>
//for printing
#include "qgscomposition.h"
#include <QBuffer>
#include <QPrinter>
#include <QSvgGenerator>
#include <QUrl>
#include <QPaintEngine>
QgsWMSServer::QgsWMSServer( QMap<QString, QString> parameters, QgsMapRenderer* renderer )
: mParameterMap( parameters )
, mConfigParser( 0 )
, mMapRenderer( renderer )
{
}
QgsWMSServer::~QgsWMSServer()
{
}
QgsWMSServer::QgsWMSServer()
{
}
void QgsWMSServer::appendFormats( QDomDocument &doc, QDomElement &elem, const QStringList &formats )
{
foreach ( QString format, formats )
{
QDomElement formatElem = doc.createElement( "Format"/*wms:Format*/ );
formatElem.appendChild( doc.createTextNode( format ) );
elem.appendChild( formatElem );
}
}
QDomDocument QgsWMSServer::getCapabilities( QString version, bool fullProjectInformation )
{
QgsDebugMsg( "Entering." );
QDomDocument doc;
QDomElement wmsCapabilitiesElement;
if ( version == "1.1.1" )
{
doc = QDomDocument( "WMT_MS_Capabilities SYSTEM 'http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd'" ); //WMS 1.1.1 needs DOCTYPE "SYSTEM http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd"
addXMLDeclaration( doc );
wmsCapabilitiesElement = doc.createElement( "WMT_MS_Capabilities"/*wms:WMS_Capabilities*/ );
}
else // 1.3.0 as default
{
addXMLDeclaration( doc );
wmsCapabilitiesElement = doc.createElement( "WMS_Capabilities"/*wms:WMS_Capabilities*/ );
wmsCapabilitiesElement.setAttribute( "xmlns", "http://www.opengis.net/wms" );
wmsCapabilitiesElement.setAttribute( "xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance" );
wmsCapabilitiesElement.setAttribute( "xsi:schemaLocation", "http://www.opengis.net/wms http://schemas.opengis.net/wms/1.3.0/capabilities_1_3_0.xsd" );
}
wmsCapabilitiesElement.setAttribute( "version", version );
doc.appendChild( wmsCapabilitiesElement );
if ( mConfigParser )
{
mConfigParser->serviceCapabilities( wmsCapabilitiesElement, doc );
}
//wms:Capability element
QDomElement capabilityElement = doc.createElement( "Capability"/*wms:Capability*/ );
wmsCapabilitiesElement.appendChild( capabilityElement );
//wms:Request element
QDomElement requestElement = doc.createElement( "Request"/*wms:Request*/ );
capabilityElement.appendChild( requestElement );
QDomElement dcpTypeElement = doc.createElement( "DCPType"/*wms:DCPType*/ );
QDomElement httpElement = doc.createElement( "HTTP"/*wms:HTTP*/ );
dcpTypeElement.appendChild( httpElement );
QDomElement elem;
//wms:GetCapabilities
elem = doc.createElement( "GetCapabilities"/*wms:GetCapabilities*/ );
appendFormats( doc, elem, QStringList() << ( version == "1.1.1" ? "application/vnd.ogc.wms_xml" : "text/xml" ) );
elem.appendChild( dcpTypeElement );
requestElement.appendChild( elem );
//Prepare url
QString hrefString = mConfigParser->serviceUrl();
if ( hrefString.isEmpty() )
{
hrefString = serviceUrl();
}
// SOAP platform
//only give this information if it is not a WMS request to be in sync with the WMS capabilities schema
QMap<QString, QString>::const_iterator service_it = mParameterMap.find( "SERVICE" );
if ( service_it != mParameterMap.end() && service_it.value().compare( "WMS", Qt::CaseInsensitive ) != 0 )
{
QDomElement soapElement = doc.createElement( "SOAP"/*wms:SOAP*/ );
httpElement.appendChild( soapElement );
QDomElement soapResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
soapResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
soapResourceElement.setAttribute( "xlink:type", "simple" );
soapResourceElement.setAttribute( "xlink:href", hrefString );
soapElement.appendChild( soapResourceElement );
}
//only Get supported for the moment
QDomElement getElement = doc.createElement( "Get"/*wms:Get*/ );
httpElement.appendChild( getElement );
QDomElement olResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
olResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
olResourceElement.setAttribute( "xlink:type", "simple" );
olResourceElement.setAttribute( "xlink:href", hrefString );
getElement.appendChild( olResourceElement );
#if 0
// POST already used by SOAP
QDomElement postElement = doc.createElement( "post"/*wms:SOAP*/ );
httpElement.appendChild( postElement );
QDomElement postResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
postResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
postResourceElement.setAttribute( "xlink:type", "simple" );
postResourceElement.setAttribute( "xlink:href", "http://" + QString( getenv( "SERVER_NAME" ) ) + QString( getenv( "REQUEST_URI" ) ) );
postElement.appendChild( postResourceElement );
dcpTypeElement.appendChild( postElement );
#endif
//wms:GetMap
elem = doc.createElement( "GetMap"/*wms:GetMap*/ );
appendFormats( doc, elem, QStringList() << "image/jpeg" << "image/png" << "image/png; mode=8bit" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:GetFeatureInfo
elem = doc.createElement( "GetFeatureInfo" );
appendFormats( doc, elem, QStringList() << "text/plain" << "text/html" << "text/xml" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:GetLegendGraphic
elem = doc.createElement( "GetLegendGraphic"/*wms:GetLegendGraphic*/ );
appendFormats( doc, elem, QStringList() << "jpeg" << "image/jpeg" << "image/png" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); // this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:GetStyles
elem = doc.createElement( "GetStyles"/*wms:GetStyles*/ );
appendFormats( doc, elem, QStringList() << "text/xml" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//wms:GetPrint
elem = doc.createElement( "GetPrint"/*wms:GetPrint*/ );
appendFormats( doc, elem, QStringList() << "svg" << "png" << "pdf" );
elem.appendChild( dcpTypeElement.cloneNode().toElement() ); //this is the same as for 'GetCapabilities'
requestElement.appendChild( elem );
//Exception element is mandatory
elem = doc.createElement( "Exception" );
appendFormats( doc, elem, QStringList() << ( version == "1.1.1" ? "application/vnd.ogc.se_xml" : "text/xml" ) );
capabilityElement.appendChild( elem );
//Insert <ComposerTemplate> elements derived from wms:_ExtendedCapabilities
if ( mConfigParser )
{
mConfigParser->printCapabilities( capabilityElement, doc );
}
//add the xml content for the individual layers/styles
QgsDebugMsg( "calling layersAndStylesCapabilities" );
if ( mConfigParser )
{
mConfigParser->layersAndStylesCapabilities( capabilityElement, doc, fullProjectInformation );
}
QgsDebugMsg( "layersAndStylesCapabilities returned" );
#if 0
//for debugging: save the document to disk
QFile capabilitiesFile( QDir::tempPath() + "/capabilities.txt" );
if ( capabilitiesFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
{
QTextStream capabilitiesStream( &capabilitiesFile );
doc.save( capabilitiesStream, 4 );
}
#endif
return doc;
}
QImage* QgsWMSServer::getLegendGraphics()
{
if ( !mConfigParser || !mMapRenderer )
{
return 0;
}
QStringList layersList, stylesList;
if ( readLayersAndStyles( layersList, stylesList ) != 0 )
{
QgsDebugMsg( "error reading layers and styles" );
return 0;
}
if ( layersList.size() < 1 )
{
return 0;
}
//scale
double scaleDenominator = -1;
QMap<QString, QString>::const_iterator scaleIt = mParameterMap.find( "SCALE" );
if ( scaleIt != mParameterMap.constEnd() )
{
bool conversionSuccess;
double scaleValue = scaleIt.value().toDouble( &conversionSuccess );
if ( conversionSuccess )
{
scaleDenominator = scaleValue;
}
}
QgsCoordinateReferenceSystem dummyCRS;
QStringList layerIds = layerSet( layersList, stylesList, dummyCRS, scaleDenominator );
if ( layerIds.size() < 1 )
{
return 0;
}
QgsLegendModel legendModel;
legendModel.setLayerSet( layerIds );
//create first image (to find out dpi)
QImage* theImage = createImage( 10, 10 );
if ( !theImage )
{
return 0;
}
double mmToPixelFactor = theImage->dotsPerMeterX() / 1000.0;
double maxTextWidth = 0;
double maxSymbolWidth = 0;
double currentY = 0;
double fontOversamplingFactor = 10.0;
//get icon size, spaces between legend items and font from config parser
double boxSpace, layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight;
QFont layerFont, itemFont;
QColor layerFontColor, itemFontColor;
legendParameters( mmToPixelFactor, fontOversamplingFactor, boxSpace, layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight,
layerFont, itemFont, layerFontColor, itemFontColor );
//first find out image dimensions without painting
QStandardItem* rootItem = legendModel.invisibleRootItem();
if ( !rootItem )
{
return 0;
}
int numLayerItems = rootItem->rowCount();
if ( numLayerItems < 1 )
{
return 0;
}
currentY = boxSpace;
for ( int i = 0; i < numLayerItems; ++i )
{
QgsComposerLayerItem* layerItem = dynamic_cast<QgsComposerLayerItem*>( rootItem->child( i ) );
if ( layerItem )
{
drawLegendLayerItem( layerItem, 0, maxTextWidth, maxSymbolWidth, currentY, layerFont, layerFontColor, itemFont, itemFontColor,
boxSpace, layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight, fontOversamplingFactor,
theImage->dotsPerMeterX() * 0.0254 );
}
}
currentY += boxSpace;
//create second image with the right dimensions
QImage* paintImage = createImage( maxTextWidth + maxSymbolWidth, currentY );
//go through the items a second time for painting
QPainter p( paintImage );
p.setRenderHint( QPainter::Antialiasing, true );
currentY = boxSpace;
for ( int i = 0; i < numLayerItems; ++i )
{
QgsComposerLayerItem* layerItem = dynamic_cast<QgsComposerLayerItem*>( rootItem->child( i ) );
if ( layerItem )
{
drawLegendLayerItem( layerItem, &p, maxTextWidth, maxSymbolWidth, currentY, layerFont, layerFontColor, itemFont, itemFontColor, boxSpace,
layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight, fontOversamplingFactor,
theImage->dotsPerMeterX() * 0.0254 );
}
}
QgsMapLayerRegistry::instance()->mapLayers().clear();
delete theImage;
return paintImage;
}
void QgsWMSServer::legendParameters( double mmToPixelFactor, double fontOversamplingFactor, double& boxSpace, double& layerSpace, double& symbolSpace, double& iconLabelSpace, double& symbolWidth, double& symbolHeight,
QFont& layerFont, QFont& itemFont, QColor& layerFontColor, QColor& itemFontColor )
{
//spaces between legend elements
QMap<QString, QString>::const_iterator boxSpaceIt = mParameterMap.find( "BOXSPACE" );
boxSpace = ( boxSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendBoxSpace() * mmToPixelFactor :
boxSpaceIt.value().toDouble() * mmToPixelFactor;
QMap<QString, QString>::const_iterator layerSpaceIt = mParameterMap.find( "LAYERSPACE" );
layerSpace = ( layerSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendLayerSpace() * mmToPixelFactor :
layerSpaceIt.value().toDouble() * mmToPixelFactor;
QMap<QString, QString>::const_iterator symbolSpaceIt = mParameterMap.find( "SYMBOLSPACE" );
symbolSpace = ( symbolSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendSymbolSpace() * mmToPixelFactor :
symbolSpaceIt.value().toDouble() * mmToPixelFactor;
QMap<QString, QString>::const_iterator iconLabelSpaceIt = mParameterMap.find( "ICONLABELSPACE" );
iconLabelSpace = ( iconLabelSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendIconLabelSpace() * mmToPixelFactor :
iconLabelSpaceIt.value().toDouble() * mmToPixelFactor;
QMap<QString, QString>::const_iterator symbolWidthIt = mParameterMap.find( "SYMBOLWIDTH" );
symbolWidth = ( symbolWidthIt == mParameterMap.constEnd() ) ? mConfigParser->legendSymbolWidth() * mmToPixelFactor :
symbolWidthIt.value().toDouble() * mmToPixelFactor;
QMap<QString, QString>::const_iterator symbolHeightIt = mParameterMap.find( "SYMBOLHEIGHT" );
symbolHeight = ( symbolHeightIt == mParameterMap.constEnd() ) ? mConfigParser->legendSymbolHeight() * mmToPixelFactor :
symbolHeightIt.value().toDouble() * mmToPixelFactor;
//font properties
layerFont = mConfigParser->legendLayerFont();
QMap<QString, QString>::const_iterator layerFontFamilyIt = mParameterMap.find( "LAYERFONTFAMILY" );
if ( layerFontFamilyIt != mParameterMap.constEnd() )
{
layerFont.setFamily( layerFontFamilyIt.value() );
}
QMap<QString, QString>::const_iterator layerFontBoldIt = mParameterMap.find( "LAYERFONTBOLD" );
if ( layerFontBoldIt != mParameterMap.constEnd() )
{
layerFont.setBold( layerFontBoldIt.value().compare( "TRUE" , Qt::CaseInsensitive ) == 0 );
}
QMap<QString, QString>::const_iterator layerFontItalicIt = mParameterMap.find( "LAYERFONTITALIC" );
if ( layerFontItalicIt != mParameterMap.constEnd() )
{
layerFont.setItalic( layerFontItalicIt.value().compare( "TRUE", Qt::CaseInsensitive ) == 0 );
}
QMap<QString, QString>::const_iterator layerFontSizeIt = mParameterMap.find( "LAYERFONTSIZE" );
if ( layerFontSizeIt != mParameterMap.constEnd() )
{
layerFont.setPixelSize( layerFontSizeIt.value().toDouble() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
}
else
{
layerFont.setPixelSize( layerFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
}
QMap<QString, QString>::const_iterator layerFontColorIt = mParameterMap.find( "LAYERFONTCOLOR" );
if ( layerFontColorIt != mParameterMap.constEnd() )
{
layerFontColor.setNamedColor( layerFontColorIt.value() );
}
else
{
layerFontColor = QColor( 0, 0, 0 );
}
itemFont = mConfigParser->legendItemFont();
QMap<QString, QString>::const_iterator itemFontFamilyIt = mParameterMap.find( "ITEMFONTFAMILY" );
if ( itemFontFamilyIt != mParameterMap.constEnd() )
{
itemFont.setFamily( itemFontFamilyIt.value() );
}
QMap<QString, QString>::const_iterator itemFontBoldIt = mParameterMap.find( "ITEMFONTBOLD" );
if ( itemFontBoldIt != mParameterMap.constEnd() )
{
itemFont.setBold( itemFontBoldIt.value().compare( "TRUE" , Qt::CaseInsensitive ) == 0 );
}
QMap<QString, QString>::const_iterator itemFontItalicIt = mParameterMap.find( "ITEMFONTITALIC" );
if ( itemFontItalicIt != mParameterMap.constEnd() )
{
itemFont.setItalic( itemFontItalicIt.value().compare( "TRUE", Qt::CaseInsensitive ) == 0 );
}
QMap<QString, QString>::const_iterator itemFontSizeIt = mParameterMap.find( "ITEMFONTSIZE" );
if ( itemFontSizeIt != mParameterMap.constEnd() )
{
itemFont.setPixelSize( itemFontSizeIt.value().toDouble() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
}
else
{
itemFont.setPixelSize( itemFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
}
QMap<QString, QString>::const_iterator itemFontColorIt = mParameterMap.find( "ITEMFONTCOLOR" );
if ( itemFontColorIt != mParameterMap.constEnd() )
{
itemFontColor.setNamedColor( itemFontColorIt.value() );
}
else
{
itemFontColor = QColor( 0, 0, 0 );
}
}
QDomDocument QgsWMSServer::getStyle()
{
QDomDocument doc;
if ( !mParameterMap.contains( "STYLE" ) )
{
throw QgsMapServiceException( "StyleNotSpecified", "Style is mandatory for GetStyle operation" );
}
if ( !mParameterMap.contains( "LAYER" ) )
{
throw QgsMapServiceException( "LayerNotSpecified", "Layer is mandatory for GetStyle operation" );
}
QString styleName = mParameterMap[ "STYLE" ];
QString layerName = mParameterMap[ "LAYER" ];
return mConfigParser->getStyle( styleName, layerName );
}
QByteArray* QgsWMSServer::getPrint( const QString& formatString )
{
QStringList layersList, stylesList, layerIdList;
QString dummyFormat;
QImage* theImage = initializeRendering( layersList, stylesList, layerIdList );
if ( !theImage )
{
return 0;
}
delete theImage;
QMap<QString, QString> originalLayerFilters = applyRequestedLayerFilters( layersList );
QStringList selectedLayerIdList = applyFeatureSelections( layersList );
//GetPrint request needs a template parameter
if ( !mParameterMap.contains( "TEMPLATE" ) )
{
throw QgsMapServiceException( "ParameterMissing", "The TEMPLATE parameter is required for the GetPrint request" );
}
QgsComposition* c = mConfigParser->createPrintComposition( mParameterMap[ "TEMPLATE" ], mMapRenderer, QMap<QString, QString>( mParameterMap ) );
if ( !c )
{
restoreLayerFilters( originalLayerFilters );
clearFeatureSelections( selectedLayerIdList );
return 0;
}
QByteArray* ba = 0;
c->setPlotStyle( QgsComposition::Print );
//SVG export without a running X-Server is a problem. See e.g. http://developer.qt.nokia.com/forums/viewthread/2038
if ( formatString.compare( "svg", Qt::CaseInsensitive ) == 0 )
{
c->setPlotStyle( QgsComposition::Print );
QSvgGenerator generator;
ba = new QByteArray();
QBuffer svgBuffer( ba );
generator.setOutputDevice( &svgBuffer );
int width = ( int )( c->paperWidth() * c->printResolution() / 25.4 ); //width in pixel
int height = ( int )( c->paperHeight() * c->printResolution() / 25.4 ); //height in pixel
generator.setSize( QSize( width, height ) );
generator.setResolution( c->printResolution() ); //because the rendering is done in mm, convert the dpi
QPainter p( &generator );
if ( c->printAsRaster() ) //embed one raster into the svg
{
QImage img = c->printPageAsRaster( 0 );
p.drawImage( QRect( 0, 0, width, height ), img, QRectF( 0, 0, img.width(), img.height() ) );
}
else
{
c->renderPage( &p, 0 );
}
p.end();
}
else if ( formatString.compare( "png", Qt::CaseInsensitive ) == 0 || formatString.compare( "jpg", Qt::CaseInsensitive ) == 0 )
{
QImage image = c->printPageAsRaster( 0 ); //can only return the first page if pixmap is requested
ba = new QByteArray();
QBuffer buffer( ba );
buffer.open( QIODevice::WriteOnly );
image.save( &buffer, formatString.toLocal8Bit().data(), -1 );
}
else if ( formatString.compare( "pdf", Qt::CaseInsensitive ) == 0 )
{
QTemporaryFile tempFile;
if ( !tempFile.open() )
{
delete c;
restoreLayerFilters( originalLayerFilters );
clearFeatureSelections( selectedLayerIdList );
return 0;
}
c->exportAsPDF( tempFile.fileName() );
ba = new QByteArray();
*ba = tempFile.readAll();
}
else //unknown format
{
throw QgsMapServiceException( "InvalidFormat", "Output format '" + formatString + "' is not supported in the GetPrint request" );
}
restoreLayerFilters( originalLayerFilters );
clearFeatureSelections( selectedLayerIdList );
delete c;
return ba;
}
QImage* QgsWMSServer::printCompositionToImage( QgsComposition* c ) const
{
int width = ( int )( c->paperWidth() * c->printResolution() / 25.4 ); //width in pixel
int height = ( int )( c->paperHeight() * c->printResolution() / 25.4 ); //height in pixel
QImage* image = new QImage( QSize( width, height ), QImage::Format_ARGB32 );
image->setDotsPerMeterX( c->printResolution() / 25.4 * 1000 );
image->setDotsPerMeterY( c->printResolution() / 25.4 * 1000 );
image->fill( 0 );
QPainter p( image );
QRectF sourceArea( 0, 0, c->paperWidth(), c->paperHeight() );
QRectF targetArea( 0, 0, width, height );
c->render( &p, targetArea, sourceArea );
p.end();
return image;
}
QImage* QgsWMSServer::getMap()
{
if ( !checkMaximumWidthHeight() )
{
throw QgsMapServiceException( "Size error", "The requested map size is too large" );
}
QStringList layersList, stylesList, layerIdList;
QImage* theImage = initializeRendering( layersList, stylesList, layerIdList );
QPainter thePainter( theImage );
thePainter.setRenderHint( QPainter::Antialiasing ); //make it look nicer
QMap<QString, QString> originalLayerFilters = applyRequestedLayerFilters( layersList );
QStringList selectedLayerIdList = applyFeatureSelections( layersList );
mMapRenderer->render( &thePainter );
restoreLayerFilters( originalLayerFilters );
clearFeatureSelections( selectedLayerIdList );
QgsDebugMsg( "clearing filters" );
QgsMapLayerRegistry::instance()->mapLayers().clear();
#ifdef QGISDEBUG
theImage->save( QDir::tempPath() + QDir::separator() + "lastrender.png" );
#endif
return theImage;
}
int QgsWMSServer::getFeatureInfo( QDomDocument& result, QString version )
{
if ( !mMapRenderer || !mConfigParser )
{
return 1;
}
result.clear();
QStringList layersList, stylesList;
bool conversionSuccess;
for ( QMap<QString, QString>::iterator it = mParameterMap.begin(); it != mParameterMap.end(); ++it )
{
QgsDebugMsg( QString( "%1 // %2" ).arg( it.key() ).arg( it.value() ) );
}
if ( readLayersAndStyles( layersList, stylesList ) != 0 )
{
return 0;
}
if ( initializeSLDParser( layersList, stylesList ) != 0 )
{
return 0;
}
QImage* outputImage = createImage();
if ( !outputImage )
{
return 1;
}
if ( configureMapRender( outputImage ) != 0 )
{
delete outputImage;
return 2;
}
//find out the current scale denominater and set it to the SLD parser
QgsScaleCalculator scaleCalc(( outputImage->logicalDpiX() + outputImage->logicalDpiY() ) / 2 , mMapRenderer->destinationCrs().mapUnits() );
QgsRectangle mapExtent = mMapRenderer->extent();
double scaleDenominator = scaleCalc.calculate( mapExtent, outputImage->width() );
mConfigParser->setScaleDenominator( scaleDenominator );
delete outputImage; //no longer needed for feature info
//read FEATURE_COUNT
int featureCount = 1;
if ( mParameterMap.contains( "FEATURE_COUNT" ) )
{
featureCount = mParameterMap[ "FEATURE_COUNT" ].toInt( &conversionSuccess );
if ( !conversionSuccess )
{
featureCount = 1;
}
}
//read QUERY_LAYERS
if ( !mParameterMap.contains( "QUERY_LAYERS" ) )
{
return 3;
}
QStringList queryLayerList = mParameterMap[ "QUERY_LAYERS" ].split( ",", QString::SkipEmptyParts );
if ( queryLayerList.size() < 1 )
{
return 4;
}
//read I,J resp. X,Y
QString iString, jString;
int i = -1;
int j = -1;
iString = mParameterMap.value( "I", mParameterMap.value( "X" ) );
i = iString.toInt( &conversionSuccess );
if ( !conversionSuccess )
{
i = -1;
}
jString = mParameterMap.value( "J", mParameterMap.value( "Y" ) );
j = jString.toInt( &conversionSuccess );
if ( !conversionSuccess )
{
j = -1;
}
//Normally, I/J or X/Y are mandatory parameters.
//However, in order to make attribute only queries via the FILTER parameter, it is allowed to skip them if the FILTER parameter is there
QgsRectangle* featuresRect = 0;
QgsPoint* infoPoint = 0;
if ( i == -1 || j == -1 )
{
if ( mParameterMap.contains( "FILTER" ) )
{
featuresRect = new QgsRectangle();
}
else
{
throw QgsMapServiceException( "ParameterMissing", "I/J parameters are required for GetFeatureInfo" );
}
}
else
{
infoPoint = new QgsPoint();
}
//get the layer registered in QgsMapLayerRegistry and apply possible filters
QStringList layerIds = layerSet( layersList, stylesList, mMapRenderer->destinationCrs() );
QMap<QString, QString> originalLayerFilters = applyRequestedLayerFilters( layersList );
QDomElement getFeatureInfoElement = result.createElement( "GetFeatureInfoResponse" );
result.appendChild( getFeatureInfoElement );
QStringList nonIdentifiableLayers = mConfigParser->identifyDisabledLayers();
QMap< QString, QMap< int, QString > > aliasInfo = mConfigParser->layerAliasInfo();
QMap< QString, QSet<QString> > hiddenAttributes = mConfigParser->hiddenAttributes();
//Render context is needed to determine feature visibility for vector layers
QgsRenderContext renderContext;
if ( mMapRenderer )
{
renderContext.setExtent( mMapRenderer->extent() );
renderContext.setRasterScaleFactor( 1.0 );
renderContext.setMapToPixel( *( mMapRenderer->coordinateTransform() ) );
renderContext.setRendererScale( mMapRenderer->scale() );
renderContext.setScaleFactor( mMapRenderer->outputDpi() / 25.4 );
renderContext.setPainter( 0 );
}
QList<QgsMapLayer*> layerList;
QgsMapLayer* currentLayer = 0;
QStringList::const_iterator layerIt;
for ( layerIt = queryLayerList.constBegin(); layerIt != queryLayerList.constEnd(); ++layerIt )
{
//create maplayers from sld parser (several layers are possible in case of feature info on a group)
layerList = mConfigParser->mapLayerFromStyle( *layerIt, "" );
QList<QgsMapLayer*>::iterator layerListIt = layerList.begin();
for ( ; layerListIt != layerList.end(); ++layerListIt )
{
currentLayer = *layerListIt;
if ( !currentLayer || nonIdentifiableLayers.contains( currentLayer->id() ) )
{
continue;
}
//skip layer if not visible at current map scale
if ( currentLayer->hasScaleBasedVisibility() && ( currentLayer->minimumScale() > scaleDenominator || currentLayer->maximumScale() < scaleDenominator ) )
{
continue;
}
if ( infoPoint && infoPointToLayerCoordinates( i, j, infoPoint, mMapRenderer, currentLayer ) != 0 )
{
continue;
}
QDomElement layerElement = result.createElement( "Layer" );
layerElement.setAttribute( "name", currentLayer->name() );
getFeatureInfoElement.appendChild( layerElement );
//switch depending on vector or raster
QgsVectorLayer* vectorLayer = dynamic_cast<QgsVectorLayer*>( currentLayer );
if ( vectorLayer )
{
//is there alias info for this vector layer?
QMap< int, QString > layerAliasInfo;
QMap< QString, QMap< int, QString > >::const_iterator aliasIt = aliasInfo.find( currentLayer->id() );
if ( aliasIt != aliasInfo.constEnd() )
{
layerAliasInfo = aliasIt.value();
}
//hidden attributes for this layer
QSet<QString> layerHiddenAttributes;
QMap< QString, QSet<QString> >::const_iterator hiddenIt = hiddenAttributes.find( currentLayer->id() );
if ( hiddenIt != hiddenAttributes.constEnd() )
{
layerHiddenAttributes = hiddenIt.value();
}
if ( featureInfoFromVectorLayer( vectorLayer, infoPoint, featureCount, result, layerElement, mMapRenderer, renderContext,
layerAliasInfo, layerHiddenAttributes, version, featuresRect ) != 0 )
{
continue;
}
}
else //raster layer
{
QgsRasterLayer* rasterLayer = dynamic_cast<QgsRasterLayer*>( currentLayer );
if ( rasterLayer )
{
if ( featureInfoFromRasterLayer( rasterLayer, infoPoint, result, layerElement, version ) != 0 )
{
continue;
}
}
else
{
continue;
}
}
}
}
if ( featuresRect )
{
QDomElement bBoxElem = result.createElement( "BoundingBox" );
bBoxElem.setAttribute( "CRS", mMapRenderer->destinationCrs().authid() );
bBoxElem.setAttribute( "minx", QString::number( featuresRect->xMinimum() ) );
bBoxElem.setAttribute( "maxx", QString::number( featuresRect->xMaximum() ) );
bBoxElem.setAttribute( "miny", QString::number( featuresRect->yMinimum() ) );
bBoxElem.setAttribute( "maxy", QString::number( featuresRect->yMaximum() ) );
getFeatureInfoElement.insertBefore( bBoxElem, QDomNode() ); //insert as first child
}
restoreLayerFilters( originalLayerFilters );
delete featuresRect;
delete infoPoint;
return 0;
}
QImage* QgsWMSServer::initializeRendering( QStringList& layersList, QStringList& stylesList, QStringList& layerIdList )
{
if ( !mConfigParser )
{
QgsDebugMsg( "Error: mSLDParser is 0" );
return 0;
}
if ( !mMapRenderer )
{
QgsDebugMsg( "Error: mMapRenderer is 0" );
return 0;
}
if ( readLayersAndStyles( layersList, stylesList ) != 0 )
{
QgsDebugMsg( "error reading layers and styles" );
return 0;
}
if ( initializeSLDParser( layersList, stylesList ) != 0 )
{
return 0;
}
//pass external GML to the SLD parser.
QString gml = mParameterMap.value( "GML" );
if ( !gml.isEmpty() )
{
QDomDocument* gmlDoc = new QDomDocument();
if ( gmlDoc->setContent( gml, true ) )
{
QString layerName = gmlDoc->documentElement().attribute( "layerName" );
QgsDebugMsg( "Adding entry with key: " + layerName + " to external GML data" );
mConfigParser->addExternalGMLData( layerName, gmlDoc );
}
else
{
QgsDebugMsg( "Error, could not add external GML to QgsSLDParser" );
delete gmlDoc;
}
}
QImage* theImage = createImage();
if ( !theImage )
{
return 0;
}
if ( configureMapRender( theImage ) != 0 )
{
delete theImage;
return 0;
}
mMapRenderer->setLabelingEngine( new QgsPalLabeling() );
//find out the current scale denominater and set it to the SLD parser
QgsScaleCalculator scaleCalc(( theImage->logicalDpiX() + theImage->logicalDpiY() ) / 2 , mMapRenderer->destinationCrs().mapUnits() );
QgsRectangle mapExtent = mMapRenderer->extent();
mConfigParser->setScaleDenominator( scaleCalc.calculate( mapExtent, theImage->width() ) );
layerIdList = layerSet( layersList, stylesList, mMapRenderer->destinationCrs() );
#ifdef QGISDEBUG
QgsDebugMsg( QString( "Number of layers to be rendered. %1" ).arg( layerIdList.count() ) );
#endif
mMapRenderer->setLayerSet( layerIdList );
//set selection color prior to each render to avoid problems with caching (selection color is a global property of QgsRenderer)
QgsRenderer::setSelectionColor( mConfigParser->selectionColor() );
return theImage;
}
QImage* QgsWMSServer::createImage( int width, int height ) const
{
bool conversionSuccess;
if ( width < 0 )
{
width = mParameterMap.value( "WIDTH", "0" ).toInt( &conversionSuccess );
if ( !conversionSuccess )
width = 0;
}
if ( height < 0 )
{
height = mParameterMap.value( "HEIGHT", "0" ).toInt( &conversionSuccess );
if ( !conversionSuccess )
{
height = 0;
}
}
if ( width < 0 || height < 0 )
{
return 0;
}
QImage* theImage = 0;
//is format jpeg?
QString format = mParameterMap.value( "FORMAT" );
bool jpeg = format.compare( "jpg", Qt::CaseInsensitive ) == 0
|| format.compare( "jpeg", Qt::CaseInsensitive ) == 0
|| format.compare( "image/jpeg", Qt::CaseInsensitive ) == 0;
//transparent parameter
bool transparent = mParameterMap.value( "TRANSPARENT" ).compare( "true", Qt::CaseInsensitive ) == 0;
//use alpha channel only if necessary because it slows down performance
if ( transparent && !jpeg )
{
theImage = new QImage( width, height, QImage::Format_ARGB32_Premultiplied );
theImage->fill( 0 );
}
else
{
theImage = new QImage( width, height, QImage::Format_RGB32 );
theImage->fill( qRgb( 255, 255, 255 ) );
}
if ( !theImage )
{
return 0;
}
//apply DPI parameter if present. This is an extension of QGIS mapserver compared to WMS 1.3.
//Because of backwards compatibility, this parameter is optional
if ( mParameterMap.contains( "DPI" ) )
{
int dpi = mParameterMap[ "DPI" ].toInt( &conversionSuccess );
if ( conversionSuccess )
{
int dpm = dpi / 0.0254;
theImage->setDotsPerMeterX( dpm );
theImage->setDotsPerMeterY( dpm );
}
}
return theImage;
}
int QgsWMSServer::configureMapRender( const QPaintDevice* paintDevice ) const
{
if ( !mMapRenderer || !paintDevice )
{
return 1; //paint device is needed for height, width, dpi
}
mMapRenderer->setOutputSize( QSize( paintDevice->width(), paintDevice->height() ), paintDevice->logicalDpiX() );
//map extent
bool conversionSuccess;
double minx, miny, maxx, maxy;
QString bbString = mParameterMap.value( "BBOX", "0,0,0,0" );
bool bboxOk = true;
minx = bbString.section( ",", 0, 0 ).toDouble( &conversionSuccess );
if ( !conversionSuccess )
bboxOk = false;
miny = bbString.section( ",", 1, 1 ).toDouble( &conversionSuccess );
if ( !conversionSuccess )
bboxOk = false;
maxx = bbString.section( ",", 2, 2 ).toDouble( &conversionSuccess );
if ( !conversionSuccess )
bboxOk = false;
maxy = bbString.section( ",", 3, 3 ).toDouble( &conversionSuccess );
if ( !conversionSuccess )
bboxOk = false;
if ( !bboxOk )
{
//throw a service exception
throw QgsMapServiceException( "InvalidParameterValue", "Invalid BBOX parameter" );
}
QGis::UnitType mapUnits = QGis::Degrees;
QString crs = mParameterMap.value( "CRS", mParameterMap.value( "SRS" ) );
QgsCoordinateReferenceSystem outputCRS;
//wms spec says that CRS parameter is mandatory.