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qgswmsrenderer.cpp
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qgswmsrenderer.cpp
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/***************************************************************************
qgswmsrenderer.cpp
-------------------
begin : May 14, 2006
copyright : (C) 2006 by Marco Hugentobler
(C) 2017 by David Marteau
email : marco dot hugentobler at karto dot baug dot ethz dot ch
david dot marteau at 3liz dot 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 "qgswmsutils.h"
#include "qgsjsonutils.h"
#include "qgswmsrenderer.h"
#include "qgsfilterrestorer.h"
#include "qgsexception.h"
#include "qgsfields.h"
#include "qgsfieldformatter.h"
#include "qgsfieldformatterregistry.h"
#include "qgsfeatureiterator.h"
#include "qgsgeometry.h"
#include "qgsmapserviceexception.h"
#include "qgslayertree.h"
#include "qgslayertreemodel.h"
#include "qgslayertreemodellegendnode.h"
#include "qgslegendrenderer.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerlegend.h"
#include "qgsmaptopixel.h"
#include "qgsproject.h"
#include "qgsrasteridentifyresult.h"
#include "qgsrasterlayer.h"
#include "qgsrasterrenderer.h"
#include "qgsscalecalculator.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgsmessagelog.h"
#include "qgsrenderer.h"
#include "qgsfeature.h"
#include "qgsaccesscontrol.h"
#include "qgsfeaturerequest.h"
#include "qgsmaprendererjobproxy.h"
#include "qgswmsserviceexception.h"
#include "qgsserverprojectutils.h"
#include "qgsmaplayerstylemanager.h"
#include "qgswkbtypes.h"
#include "qgsannotationmanager.h"
#include "qgsannotation.h"
#include "qgsvectorlayerlabeling.h"
#include "qgsvectorlayerfeaturecounter.h"
#include "qgspallabeling.h"
#include "qgslayerrestorer.h"
#include "qgsdxfexport.h"
#include "qgssymbollayerutils.h"
#include "qgsserverexception.h"
#include "qgsexpressioncontextutils.h"
#include <QImage>
#include <QPainter>
#include <QStringList>
#include <QTemporaryFile>
#include <QDir>
//for printing
#include "qgslayoutatlas.h"
#include "qgslayoutmanager.h"
#include "qgslayoutexporter.h"
#include "qgslayoutsize.h"
#include "qgslayoutrendercontext.h"
#include "qgslayoutmeasurement.h"
#include "qgsprintlayout.h"
#include "qgslayoutpagecollection.h"
#include "qgslayoutitempage.h"
#include "qgslayoutitemlabel.h"
#include "qgslayoutitemlegend.h"
#include "qgslayoutitemmap.h"
#include "qgslayoutitemmapgrid.h"
#include "qgslayoutframe.h"
#include "qgslayoutitemhtml.h"
#include "qgsfeaturefilterprovidergroup.h"
#include "qgsogcutils.h"
#include "qgsunittypes.h"
#include <QUrl>
namespace QgsWms
{
namespace
{
QgsLayerTreeModelLegendNode *_findLegendNodeForRule( QgsLayerTreeModel *legendModel, const QString &rule )
{
for ( QgsLayerTreeLayer *nodeLayer : legendModel->rootGroup()->findLayers() )
{
for ( QgsLayerTreeModelLegendNode *legendNode : legendModel->layerLegendNodes( nodeLayer ) )
{
if ( legendNode->data( Qt::DisplayRole ).toString() == rule )
return legendNode;
}
}
return nullptr;
}
} // namespace
QgsRenderer::QgsRenderer( const QgsWmsRenderContext &context )
: mContext( context )
{
mProject = mContext.project();
mWmsParameters = mContext.parameters();
mWmsParameters.dump();
}
QgsRenderer::~QgsRenderer()
{
removeTemporaryLayers();
}
QImage *QgsRenderer::getLegendGraphics()
{
// check parameters
if ( mWmsParameters.allLayersNickname().isEmpty() )
throw QgsBadRequestException( QgsServiceException::QGIS_MISSING_PARAMETER_VALUE,
mWmsParameters[QgsWmsParameter::LAYERS] );
if ( mWmsParameters.format() == QgsWmsParameters::Format::NONE )
throw QgsBadRequestException( QgsServiceException::QGIS_MISSING_PARAMETER_VALUE,
mWmsParameters[QgsWmsParameter::FORMAT] );
// get layers
std::unique_ptr<QgsLayerRestorer> restorer;
restorer.reset( new QgsLayerRestorer( mContext.layers() ) );
// configure layers
QList<QgsMapLayer *> layers = mContext.layersToRender();
configureLayers( layers );
// build layer tree model for legend
QgsLayerTree rootGroup;
QgsLegendSettings legendSettings = mContext.parameters().legendSettings();
std::unique_ptr<QgsLayerTreeModel> legendModel;
legendModel.reset( buildLegendTreeModel( layers, mContext.scaleDenominator(), rootGroup ) );
// rendering step
const qreal dpmm = mContext.dotsPerMm();
std::unique_ptr<QImage> image;
std::unique_ptr<QPainter> painter;
// getting scale from bbox
if ( !mWmsParameters.bbox().isEmpty() )
{
QgsMapSettings mapSettings;
image.reset( createImage( width(), height(), false ) );
configureMapSettings( image.get(), mapSettings );
legendSettings.setMapScale( mapSettings.scale() );
legendSettings.setMapUnitsPerPixel( mapSettings.mapUnitsPerPixel() );
}
if ( !mWmsParameters.rule().isEmpty() )
{
QString rule = mWmsParameters.rule();
int width = mWmsParameters.widthAsInt();
int height = mWmsParameters.heightAsInt();
image.reset( createImage( width, height, false ) );
painter.reset( new QPainter( image.get() ) );
painter->setRenderHint( QPainter::Antialiasing, true );
painter->scale( dpmm, dpmm );
QgsLayerTreeModelLegendNode *legendNode = _findLegendNodeForRule( legendModel.get(), rule );
if ( legendNode )
{
QgsLayerTreeModelLegendNode::ItemContext ctx;
ctx.painter = painter.get();
ctx.labelXOffset = 0;
ctx.point = QPointF();
double itemHeight = height / dpmm;
legendNode->drawSymbol( legendSettings, &ctx, itemHeight );
painter->end();
}
}
else
{
QgsLegendRenderer legendRendererNew( legendModel.get(), legendSettings );
QSizeF minSize = legendRendererNew.minimumSize();
QSize s( minSize.width() * dpmm, minSize.height() * dpmm );
image.reset( createImage( s.width(), s.height(), false ) );
painter.reset( new QPainter( image.get() ) );
painter->setRenderHint( QPainter::Antialiasing, true );
painter->scale( dpmm, dpmm );
legendRendererNew.drawLegend( painter.get() );
painter->end();
}
rootGroup.clear();
return image.release();
}
void QgsRenderer::runHitTest( const QgsMapSettings &mapSettings, HitTest &hitTest ) const
{
QgsRenderContext context = QgsRenderContext::fromMapSettings( mapSettings );
for ( const QString &id : mapSettings.layerIds() )
{
QgsVectorLayer *vl = qobject_cast<QgsVectorLayer *>( mProject->mapLayer( id ) );
if ( !vl || !vl->renderer() )
continue;
if ( vl->hasScaleBasedVisibility() && vl->isInScaleRange( mapSettings.scale() ) )
{
hitTest[vl] = SymbolSet(); // no symbols -> will not be shown
continue;
}
QgsCoordinateTransform tr = mapSettings.layerTransform( vl );
context.setCoordinateTransform( tr );
context.setExtent( tr.transformBoundingBox( mapSettings.extent(), QgsCoordinateTransform::ReverseTransform ) );
SymbolSet &usedSymbols = hitTest[vl];
runHitTestLayer( vl, usedSymbols, context );
}
}
void QgsRenderer::runHitTestLayer( QgsVectorLayer *vl, SymbolSet &usedSymbols, QgsRenderContext &context ) const
{
std::unique_ptr< QgsFeatureRenderer > r( vl->renderer()->clone() );
bool moreSymbolsPerFeature = r->capabilities() & QgsFeatureRenderer::MoreSymbolsPerFeature;
r->startRender( context, vl->fields() );
QgsFeature f;
QgsFeatureRequest request( context.extent() );
request.setFlags( QgsFeatureRequest::ExactIntersect );
QgsFeatureIterator fi = vl->getFeatures( request );
while ( fi.nextFeature( f ) )
{
context.expressionContext().setFeature( f );
if ( moreSymbolsPerFeature )
{
for ( QgsSymbol *s : r->originalSymbolsForFeature( f, context ) )
usedSymbols.insert( QgsSymbolLayerUtils::symbolProperties( s ) );
}
else
usedSymbols.insert( QgsSymbolLayerUtils::symbolProperties( r->originalSymbolForFeature( f, context ) ) );
}
r->stopRender( context );
}
QByteArray QgsRenderer::getPrint()
{
// init layer restorer before doing anything
std::unique_ptr<QgsLayerRestorer> restorer;
restorer.reset( new QgsLayerRestorer( mContext.layers() ) );
// GetPrint request needs a template parameter
const QString templateName = mWmsParameters.composerTemplate();
if ( templateName.isEmpty() )
{
throw QgsBadRequestException( QgsServiceException::QGIS_MISSING_PARAMETER_VALUE,
QgsWmsParameter::TEMPLATE );
}
// check template
const QgsLayoutManager *lManager = mProject->layoutManager();
QgsPrintLayout *sourceLayout( dynamic_cast<QgsPrintLayout *>( lManager->layoutByName( templateName ) ) );
if ( !sourceLayout )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
mWmsParameters[QgsWmsParameter::TEMPLATE ] );
}
// Check that layout has at least one page
if ( sourceLayout->pageCollection()->pageCount() < 1 )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
QStringLiteral( "The template has no pages" ) );
}
std::unique_ptr<QgsPrintLayout> layout( sourceLayout->clone() );
//atlas print?
QgsLayoutAtlas *atlas = 0;
QStringList atlasPk = mWmsParameters.atlasPk();
if ( !atlasPk.isEmpty() ) //atlas print requested?
{
atlas = layout->atlas();
if ( !atlas || !atlas->enabled() )
{
//error
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
QStringLiteral( "The template has no atlas enabled" ) );
}
QgsVectorLayer *cLayer = atlas->coverageLayer();
if ( !cLayer )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
QStringLiteral( "The atlas has no coverage layer" ) );
}
int maxAtlasFeatures = QgsServerProjectUtils::wmsMaxAtlasFeatures( *mProject );
if ( atlasPk.size() == 1 && atlasPk.at( 0 ) == QStringLiteral( "*" ) )
{
atlas->setFilterFeatures( false );
atlas->updateFeatures();
if ( atlas->count() > maxAtlasFeatures )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
QString( "The project configuration allows printing maximum %1 atlas features at a time" ).arg( maxAtlasFeatures ) );
}
}
else
{
QgsAttributeList pkIndexes = cLayer->primaryKeyAttributes();
if ( pkIndexes.size() < 1 )
{
throw QgsException( QStringLiteral( "An error occurred during the Atlas print" ) );
}
QStringList pkAttributeNames;
for ( int i = 0; i < pkIndexes.size(); ++i )
{
pkAttributeNames.append( cLayer->fields()[pkIndexes.at( i )].name() );
}
int nAtlasFeatures = atlasPk.size() / pkIndexes.size();
if ( nAtlasFeatures * pkIndexes.size() != atlasPk.size() ) //Test is atlasPk.size() is a multiple of pkIndexes.size(). Bail out if not
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
QStringLiteral( "Wrong number of ATLAS_PK parameters" ) );
}
//number of atlas features might be restricted
if ( nAtlasFeatures > maxAtlasFeatures )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
QString( "%1 atlas features have been requestet, but the project configuration only allows printing %2 atlas features at a time" )
.arg( nAtlasFeatures ).arg( maxAtlasFeatures ) );
}
QString filterString;
int currentAtlasPk = 0;
for ( int i = 0; i < nAtlasFeatures; ++i )
{
if ( i > 0 )
{
filterString.append( " OR " );
}
filterString.append( "( " );
for ( int j = 0; j < pkIndexes.size(); ++j )
{
if ( j > 0 )
{
filterString.append( " AND " );
}
filterString.append( QString( "\"%1\" = %2" ).arg( pkAttributeNames.at( j ) ).arg( atlasPk.at( currentAtlasPk ) ) );
++currentAtlasPk;
}
filterString.append( " )" );
}
atlas->setFilterFeatures( true );
QString errorString;
atlas->setFilterExpression( filterString, errorString );
if ( !errorString.isEmpty() )
{
throw QgsException( QStringLiteral( "An error occurred during the Atlas print" ) );
}
}
}
// configure layers
QgsMapSettings mapSettings;
QList<QgsMapLayer *> layers = mContext.layersToRender();
configureLayers( layers, &mapSettings );
// configure map settings (background, DPI, ...)
std::unique_ptr<QImage> image( new QImage() );
configureMapSettings( image.get(), mapSettings );
// add layers to map settings (revert order for the rendering)
mapSettings.setLayers( layers );
// configure layout
configurePrintLayout( layout.get(), mapSettings, atlas );
// Get the temporary output file
const QgsWmsParameters::Format format = mWmsParameters.format();
const QString extension = QgsWmsParameters::formatAsString( format ).toLower();
QTemporaryFile tempOutputFile( QDir::tempPath() + '/' + QStringLiteral( "XXXXXX.%1" ).arg( extension ) );
if ( !tempOutputFile.open() )
{
throw QgsException( QStringLiteral( "Could not open temporary file for the GetPrint request." ) );
}
QString exportError;
if ( format == QgsWmsParameters::SVG )
{
// Settings for the layout exporter
QgsLayoutExporter::SvgExportSettings exportSettings;
if ( !mWmsParameters.dpi().isEmpty() )
{
bool ok;
double dpi( mWmsParameters.dpi().toDouble( &ok ) );
if ( ok )
exportSettings.dpi = dpi;
}
// Draw selections
exportSettings.flags |= QgsLayoutRenderContext::FlagDrawSelection;
if ( atlas )
{
//export first page of atlas
atlas->beginRender();
if ( atlas->next() )
{
QgsLayoutExporter atlasSvgExport( atlas->layout() );
atlasSvgExport.exportToSvg( tempOutputFile.fileName(), exportSettings );
}
}
else
{
QgsLayoutExporter exporter( layout.get() );
exporter.exportToSvg( tempOutputFile.fileName(), exportSettings );
}
}
else if ( format == QgsWmsParameters::PNG || format == QgsWmsParameters::JPG )
{
// Settings for the layout exporter
QgsLayoutExporter::ImageExportSettings exportSettings;
// Get the dpi from input or use the default
double dpi( layout->renderContext().dpi( ) );
if ( !mWmsParameters.dpi().isEmpty() )
{
bool ok;
double _dpi = mWmsParameters.dpi().toDouble( &ok );
if ( ! ok )
dpi = _dpi;
}
exportSettings.dpi = dpi;
// Draw selections
exportSettings.flags |= QgsLayoutRenderContext::FlagDrawSelection;
// Destination image size in px
QgsLayoutSize layoutSize( layout->pageCollection()->page( 0 )->sizeWithUnits() );
QgsLayoutMeasurement width( layout->convertFromLayoutUnits( layoutSize.width(), QgsUnitTypes::LayoutUnit::LayoutMillimeters ) );
QgsLayoutMeasurement height( layout->convertFromLayoutUnits( layoutSize.height(), QgsUnitTypes::LayoutUnit::LayoutMillimeters ) );
exportSettings.imageSize = QSize( static_cast<int>( width.length() * dpi / 25.4 ), static_cast<int>( height.length() * dpi / 25.4 ) );
// Export first page only (unless it's a pdf, see below)
exportSettings.pages.append( 0 );
if ( atlas )
{
//only can give back one page in server rendering
atlas->beginRender();
if ( atlas->next() )
{
QgsLayoutExporter atlasPngExport( atlas->layout() );
atlasPngExport.exportToImage( tempOutputFile.fileName(), exportSettings );
}
}
else
{
QgsLayoutExporter exporter( layout.get() );
exporter.exportToImage( tempOutputFile.fileName(), exportSettings );
}
}
else if ( format == QgsWmsParameters::PDF )
{
// Settings for the layout exporter
QgsLayoutExporter::PdfExportSettings exportSettings;
// TODO: handle size from input ?
if ( !mWmsParameters.dpi().isEmpty() )
{
bool ok;
double dpi( mWmsParameters.dpi().toDouble( &ok ) );
if ( ok )
exportSettings.dpi = dpi;
}
// Draw selections
exportSettings.flags |= QgsLayoutRenderContext::FlagDrawSelection;
// Print as raster
exportSettings.rasterizeWholeImage = layout->customProperty( QStringLiteral( "rasterize" ), false ).toBool();
// Export all pages
QgsLayoutExporter exporter( layout.get() );
if ( atlas )
{
exporter.exportToPdf( atlas, tempOutputFile.fileName(), exportSettings, exportError );
}
else
{
exporter.exportToPdf( tempOutputFile.fileName(), exportSettings );
}
}
else //unknown format
{
throw QgsBadRequestException( QgsServiceException::OGC_INVALID_FORMAT,
mWmsParameters[QgsWmsParameter::FORMAT] );
}
if ( atlas )
{
handlePrintErrors( atlas->layout() );
}
else
{
handlePrintErrors( layout.get() );
}
return tempOutputFile.readAll();
}
bool QgsRenderer::configurePrintLayout( QgsPrintLayout *c, const QgsMapSettings &mapSettings, bool atlasPrint )
{
c->renderContext().setSelectionColor( mapSettings.selectionColor() );
// Maps are configured first
QList<QgsLayoutItemMap *> maps;
c->layoutItems<QgsLayoutItemMap>( maps );
// Layout maps now use a string UUID as "id", let's assume that the first map
// has id 0 and so on ...
int mapId = 0;
for ( const auto &map : qgis::as_const( maps ) )
{
QgsWmsParametersComposerMap cMapParams = mWmsParameters.composerMapParameters( mapId );
mapId++;
if ( !atlasPrint || !map->atlasDriven() ) //No need to extent, scal, rotation set with atlas feature
{
//map extent is mandatory
if ( !cMapParams.mHasExtent )
{
//remove map from composition if not referenced by the request
c->removeLayoutItem( map );
continue;
}
// Change CRS of map set to "project CRS" to match requested CRS
// (if map has a valid preset crs then we keep this crs and don't use the
// requested crs for this map item)
if ( mapSettings.destinationCrs().isValid() && !map->presetCrs().isValid() )
map->setCrs( mapSettings.destinationCrs() );
QgsRectangle r( cMapParams.mExtent );
if ( mWmsParameters.versionAsNumber() >= QgsProjectVersion( 1, 3, 0 ) &&
mapSettings.destinationCrs().hasAxisInverted() )
{
r.invert();
}
map->setExtent( r );
// scale
if ( cMapParams.mScale > 0 )
{
map->setScale( cMapParams.mScale );
}
// rotation
if ( cMapParams.mRotation )
{
map->setMapRotation( cMapParams.mRotation );
}
}
if ( !map->keepLayerSet() )
{
if ( cMapParams.mLayers.isEmpty() && cMapParams.mExternalLayers.isEmpty() )
{
map->setLayers( mapSettings.layers() );
}
else
{
QList<QgsMapLayer *> layerSet;
for ( auto layer : cMapParams.mLayers )
{
QgsMapLayer *mlayer = mContext.layer( layer.mNickname );
if ( ! mlayer )
{
continue;
}
setLayerStyle( mlayer, layer.mStyle );
layerSet << mlayer;
}
layerSet << externalLayers( cMapParams.mExternalLayers );
layerSet << highlightLayers( cMapParams.mHighlightLayers );
std::reverse( layerSet.begin(), layerSet.end() );
map->setLayers( layerSet );
}
map->setKeepLayerSet( true );
}
//grid space x / y
if ( cMapParams.mGridX > 0 && cMapParams.mGridY > 0 )
{
map->grid()->setIntervalX( cMapParams.mGridX );
map->grid()->setIntervalY( cMapParams.mGridY );
}
}
// Labels
QList<QgsLayoutItemLabel *> labels;
c->layoutItems<QgsLayoutItemLabel>( labels );
for ( const auto &label : qgis::as_const( labels ) )
{
bool ok = false;
const QString labelId = label->id();
const QString labelParam = mWmsParameters.layoutParameter( labelId, ok );
if ( !ok )
continue;
if ( labelParam.isEmpty() )
{
//remove exported labels referenced in the request
//but with empty string
c->removeItem( label );
delete label;
continue;
}
label->setText( labelParam );
}
// HTMLs
QList<QgsLayoutItemHtml *> htmls;
c->layoutObjects<QgsLayoutItemHtml>( htmls );
for ( const auto &html : qgis::as_const( htmls ) )
{
if ( html->frameCount() == 0 )
continue;
QgsLayoutFrame *htmlFrame = html->frame( 0 );
bool ok = false;
const QString htmlId = htmlFrame->id();
const QString url = mWmsParameters.layoutParameter( htmlId, ok );
if ( !ok )
{
html->update();
continue;
}
//remove exported Htmls referenced in the request
//but with empty string
if ( url.isEmpty() )
{
c->removeMultiFrame( html );
delete html;
continue;
}
QUrl newUrl( url );
html->setUrl( newUrl );
html->update();
}
// legends
QList<QgsLayoutItemLegend *> legends;
c->layoutItems<QgsLayoutItemLegend>( legends );
for ( const auto &legend : qgis::as_const( legends ) )
{
if ( legend->autoUpdateModel() )
{
// the legend has an auto-update model
// we will update it with map's layers
const QgsLayoutItemMap *map = legend->linkedMap();
if ( !map )
{
continue;
}
legend->setAutoUpdateModel( false );
// get model and layer tree root of the legend
QgsLegendModel *model = legend->model();
QStringList layerSet;
const QList<QgsMapLayer *> layerList( map->layers() );
for ( const auto &layer : layerList )
layerSet << layer->id();
//setLayerIdsToLegendModel( model, layerSet, map->scale() );
// get model and layer tree root of the legend
QgsLayerTree *root = model->rootGroup();
// get layerIds find in the layer tree root
const QStringList layerIds = root->findLayerIds();
// find the layer in the layer tree
// remove it if the layer id is not in map layerIds
for ( const auto &layerId : layerIds )
{
QgsLayerTreeLayer *nodeLayer = root->findLayer( layerId );
if ( !nodeLayer )
{
continue;
}
if ( !layerSet.contains( layerId ) )
{
qobject_cast<QgsLayerTreeGroup *>( nodeLayer->parent() )->removeChildNode( nodeLayer );
}
else
{
QgsMapLayer *layer = nodeLayer->layer();
if ( !layer->isInScaleRange( map->scale() ) )
{
qobject_cast<QgsLayerTreeGroup *>( nodeLayer->parent() )->removeChildNode( nodeLayer );
}
}
}
root->removeChildrenGroupWithoutLayers();
}
}
return true;
}
QImage *QgsRenderer::getMap( HitTest *hitTest )
{
QgsMapSettings mapSettings;
return getMap( mapSettings, hitTest );
}
QImage *QgsRenderer::getMap( QgsMapSettings &mapSettings, HitTest *hitTest )
{
// check size
if ( !checkMaximumWidthHeight() )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
QStringLiteral( "The requested map size is too large" ) );
}
// init layer restorer before doing anything
std::unique_ptr<QgsLayerRestorer> restorer;
restorer.reset( new QgsLayerRestorer( mContext.layers() ) );
// configure layers
QList<QgsMapLayer *> layers = mContext.layersToRender();
configureLayers( layers, &mapSettings );
// create the output image and the painter
std::unique_ptr<QPainter> painter;
std::unique_ptr<QImage> image( createImage() );
// configure map settings (background, DPI, ...)
configureMapSettings( image.get(), mapSettings );
// add layers to map settings (revert order for the rendering)
mapSettings.setLayers( layers );
// rendering step for layers
painter.reset( layersRendering( mapSettings, *image, hitTest ) );
// rendering step for annotations
annotationsRendering( painter.get() );
// painting is terminated
painter->end();
// scale output image if necessary (required by WMS spec)
QImage *scaledImage = scaleImage( image.get() );
if ( scaledImage )
image.reset( scaledImage );
// return
return image.release();
}
QgsDxfExport QgsRenderer::getDxf()
{
// init layer restorer before doing anything
std::unique_ptr<QgsLayerRestorer> restorer;
restorer.reset( new QgsLayerRestorer( mContext.layers() ) );
// configure layers
QList<QgsMapLayer *> layers = mContext.layersToRender();
configureLayers( layers );
// get dxf layers
const QStringList attributes = mWmsParameters.dxfLayerAttributes();
QList< QgsDxfExport::DxfLayer > dxfLayers;
int layerIdx = -1;
for ( QgsMapLayer *layer : layers )
{
layerIdx++;
if ( layer->type() != QgsMapLayerType::VectorLayer )
continue;
// cast for dxf layers
QgsVectorLayer *vlayer = static_cast<QgsVectorLayer *>( layer );
// get the layer attribute used in dxf
int layerAttribute = -1;
if ( attributes.size() > layerIdx )
{
layerAttribute = vlayer->fields().indexFromName( attributes[ layerIdx ] );
}
dxfLayers.append( QgsDxfExport::DxfLayer( vlayer, layerAttribute ) );
}
// add layers to dxf
QgsDxfExport dxf;
dxf.setExtent( mWmsParameters.bboxAsRectangle() );
dxf.addLayers( dxfLayers );
dxf.setLayerTitleAsName( mWmsParameters.dxfUseLayerTitleAsName() );
dxf.setSymbologyExport( mWmsParameters.dxfMode() );
if ( mWmsParameters.dxfFormatOptions().contains( QgsWmsParameters::DxfFormatOption::SCALE ) )
{
dxf.setSymbologyScale( mWmsParameters.dxfScale() );
}
return dxf;
}
static void infoPointToMapCoordinates( int i, int j, QgsPointXY *infoPoint, const QgsMapSettings &mapSettings )
{
//check if i, j are in the pixel range of the image
if ( i < 0 || i > mapSettings.outputSize().width() )
{
throw QgsBadRequestException( QgsServiceException::INVALID_POINT,
mWmsParameters[QgsWmsParameter::I] );
}
if ( j < 0 || j > mapSettings.outputSize().height() )
{
throw QgsBadRequestException( QgsServiceException::INVALID_POINT,
mWmsParameters[QgsWmsParameter::J] );
}
double xRes = mapSettings.extent().width() / mapSettings.outputSize().width();
double yRes = mapSettings.extent().height() / mapSettings.outputSize().height();
infoPoint->setX( mapSettings.extent().xMinimum() + i * xRes + xRes / 2.0 );
infoPoint->setY( mapSettings.extent().yMaximum() - j * yRes - yRes / 2.0 );
}
QByteArray QgsRenderer::getFeatureInfo( const QString &version )
{
// Verifying Mandatory parameters
// The QUERY_LAYERS parameter is Mandatory
if ( mWmsParameters.queryLayersNickname().isEmpty() )
{
throw QgsBadRequestException( QgsServiceException::QGIS_MISSING_PARAMETER_VALUE,
mWmsParameters[QgsWmsParameter::QUERY_LAYERS] );
}
// The I/J parameters are Mandatory if they are not replaced by X/Y or FILTER or FILTER_GEOM
const bool ijDefined = !mWmsParameters.i().isEmpty() && !mWmsParameters.j().isEmpty();
const bool xyDefined = !mWmsParameters.x().isEmpty() && !mWmsParameters.y().isEmpty();
const bool filtersDefined = !mWmsParameters.filters().isEmpty();
const bool filterGeomDefined = !mWmsParameters.filterGeom().isEmpty();
if ( !ijDefined && !xyDefined && !filtersDefined && !filterGeomDefined )
{
QgsWmsParameter parameter = mWmsParameters[QgsWmsParameter::I];
if ( mWmsParameters.j().isEmpty() )
parameter = mWmsParameters[QgsWmsParameter::J];
throw QgsBadRequestException( QgsServiceException::QGIS_MISSING_PARAMETER_VALUE, parameter );
}
const QgsWmsParameters::Format infoFormat = mWmsParameters.infoFormat();
if ( infoFormat == QgsWmsParameters::Format::NONE )
{
throw QgsBadRequestException( QgsServiceException::OGC_INVALID_FORMAT,
mWmsParameters[QgsWmsParameter::INFO_FORMAT] );
}
// create the mapSettings and the output image
int imageWidth = mWmsParameters.widthAsInt();
int imageHeight = mWmsParameters.heightAsInt();
if ( !( imageWidth && imageHeight ) && ! mWmsParameters.infoFormatIsImage() )
{
imageWidth = 10;
imageHeight = 10;
}
std::unique_ptr<QImage> outputImage( createImage( imageWidth, imageHeight ) );
// init layer restorer before doing anything
std::unique_ptr<QgsLayerRestorer> restorer;
restorer.reset( new QgsLayerRestorer( mContext.layers() ) );
// The CRS parameter is considered as mandatory in configureMapSettings
// but in the case of filter parameter, CRS parameter has not to be mandatory
bool mandatoryCrsParam = true;
if ( filtersDefined && !ijDefined && !xyDefined && mWmsParameters.crs().isEmpty() )
{
mandatoryCrsParam = false;
}
// configure map settings (background, DPI, ...)
QgsMapSettings mapSettings;
configureMapSettings( outputImage.get(), mapSettings, mandatoryCrsParam );
// compute scale denominator
QgsScaleCalculator scaleCalc( ( outputImage->logicalDpiX() + outputImage->logicalDpiY() ) / 2, mapSettings.destinationCrs().mapUnits() );
const double scaleDenominator = scaleCalc.calculate( mWmsParameters.bboxAsRectangle(), outputImage->width() );
// configure layers
QgsWmsRenderContext context = mContext;
context.setScaleDenominator( scaleDenominator );
QList<QgsMapLayer *> layers = context.layersToRender();
configureLayers( layers, &mapSettings );
// add layers to map settings
mapSettings.setLayers( layers );
QDomDocument result = featureInfoDocument( layers, mapSettings, outputImage.get(), version );
QByteArray ba;
if ( infoFormat == QgsWmsParameters::Format::TEXT )
ba = convertFeatureInfoToText( result );
else if ( infoFormat == QgsWmsParameters::Format::HTML )
ba = convertFeatureInfoToHtml( result );
else if ( infoFormat == QgsWmsParameters::Format::JSON )
ba = convertFeatureInfoToJson( layers, result );
else
ba = result.toByteArray();
return ba;
}
QImage *QgsRenderer::createImage( int width, int height, bool useBbox ) const
{
if ( width < 0 )
width = this->width();
if ( height < 0 )
height = this->height();
//Adapt width / height if the aspect ratio does not correspond with the BBOX.
//Required by WMS spec. 1.3.
if ( useBbox && mWmsParameters.versionAsNumber() >= QgsProjectVersion( 1, 3, 0 ) )
{
QgsRectangle mapExtent = mWmsParameters.bboxAsRectangle();
if ( !mWmsParameters.bbox().isEmpty() && mapExtent.isEmpty() )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
mWmsParameters[QgsWmsParameter::BBOX] );
}
QString crs = mWmsParameters.crs();
if ( crs.compare( "CRS:84", Qt::CaseInsensitive ) == 0 )
{
crs = QString( "EPSG:4326" );
mapExtent.invert();
}
QgsCoordinateReferenceSystem outputCRS = QgsCoordinateReferenceSystem::fromOgcWmsCrs( crs );
if ( outputCRS.hasAxisInverted() )
{
mapExtent.invert();
}
if ( !mapExtent.isEmpty() && height > 0 && width > 0 )
{
double mapWidthHeightRatio = mapExtent.width() / mapExtent.height();
double imageWidthHeightRatio = static_cast<double>( width ) / static_cast<double>( height );
if ( !qgsDoubleNear( mapWidthHeightRatio, imageWidthHeightRatio, 0.0001 ) )
{
// inspired by MapServer, mapdraw.c L115
double cellsize = ( mapExtent.width() / static_cast<double>( width ) ) * 0.5 + ( mapExtent.height() / static_cast<double>( height ) ) * 0.5;
width = mapExtent.width() / cellsize;
height = mapExtent.height() / cellsize;
}
}
}
if ( width <= 0 )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
mWmsParameters[QgsWmsParameter::WIDTH] );
}
else if ( height <= 0 )
{
throw QgsBadRequestException( QgsServiceException::QGIS_INVALID_PARAMETER_VALUE,
mWmsParameters[QgsWmsParameter::HEIGHT] );
}