Fix tile render mode not applied in 2.18 server

Author: mhugent

python/core/qgsmaprenderer.sip

@@ -325,6 +325,9 @@ class QgsMapRenderer : QObject
      */
     void setFeatureFilterProvider( const QgsFeatureFilterProvider* ffp );
 
+    /** Set tile mode (render code tries to prevent tile border effects)*/
+    void setTileRenderMode( bool enabled );
+
   signals:
 
     //! @deprecated in 2.4 - not emitted anymore

python/server/qgswmsconfigparser.sip

@@ -123,6 +123,9 @@ class QgsWMSConfigParser
 
     virtual bool useLayerIDs() const = 0;
 
+    /** True if tile render mode is enabled in the configuration*/
+    virtual bool tileRenderMode() const = 0;
+
   private:
 
     QgsWMSConfigParser();

src/core/qgsmaprenderer.cpp

@@ -62,6 +62,8 @@ QgsMapRenderer::QgsMapRenderer()
 
   mLabelingEngine = nullptr;
   readDefaultDatumTransformations();
+
+  mTileRenderMode = false;
 }
 
 QgsMapRenderer::~QgsMapRenderer()
@@ -343,6 +345,8 @@ void QgsMapRenderer::render( QPainter* painter, double* forceWidthScale )
   QListIterator<QString> li( mLayerSet );
   li.toBack();
 
+  mRenderContext.setFlag( QgsRenderContext::RenderMapTile, mTileRenderMode );
+
   QgsRectangle r1, r2;
 
   while ( li.hasPrevious() )

src/core/qgsmaprenderer.h

@@ -396,6 +396,9 @@ class CORE_EXPORT QgsMapRenderer : public QObject
       mRenderContext.setFeatureFilterProvider( ffp );
     }
 
+    /** Set tile mode (render code tries to prevent tile border effects)*/
+    void setTileRenderMode( bool enabled ) { mTileRenderMode = enabled; }
+
   signals:
 
     //! @deprecated in 2.4 - not emitted anymore
@@ -512,6 +515,9 @@ class CORE_EXPORT QgsMapRenderer : public QObject
 
     QHash< QPair< QString, QString >, QPair< int, int > > mDefaultDatumTransformations;
 
+    /** Tell the render system we are rendering a map tile*/
+    bool mTileRenderMode;
+
   private:
     void readDefaultDatumTransformations();
 };

src/server/qgssldconfigparser.cpp

@@ -801,6 +801,15 @@ void QgsSLDConfigParser::serviceCapabilities( QDomElement& parentElement, QDomDo
   }
 }
 
+bool QgsSLDConfigParser::tileRenderMode() const
+{
+  if ( mFallbackParser )
+  {
+    return mFallbackParser->tileRenderMode();
+  }
+  return false;
+}
+
 QList<QDomElement> QgsSLDConfigParser::findNamedLayerElements( const QString& layerName ) const
 {
   QList<QDomElement> resultList;

src/server/qgssldconfigparser.h

@@ -132,6 +132,9 @@ class QgsSLDConfigParser : public QgsWMSConfigParser
 
     void serviceCapabilities( QDomElement& parentElement, QDomDocument& doc ) const override;
 
+    /** True if tile render mode is enabled in the configuration*/
+    bool tileRenderMode() const override;
+
   private:
 
     /** SLD as dom document*/

src/server/qgswmsconfigparser.h

@@ -139,6 +139,9 @@ class SERVER_EXPORT QgsWMSConfigParser
 
     virtual bool useLayerIDs() const = 0;
 
+    /** True if tile render mode is enabled in the configuration*/
+    virtual bool tileRenderMode() const = 0;
+
     /** Adds highlight layers to the layer registry and to the layer set. Returns the ids of the newly created layers (for later removal)*/
     static QStringList addHighlightLayers( const QMap<QString, QString>& parameterMap, QStringList& layerSet, const QString& parameterPrefix = QString() );
     static void removeHighlightLayers( const QStringList& layerIds );

src/server/qgswmsprojectparser.cpp

@@ -2323,6 +2323,28 @@ void QgsWMSProjectParser::serviceCapabilities( QDomElement& parentElement, QDomD
   mProjectParser->serviceCapabilities( parentElement, doc, "WMS", featureInfoFormatSIA2045() );
 }
 
+bool QgsWMSProjectParser::tileRenderMode() const
+{
+  if ( !mProjectParser->xmlDocument() )
+  {
+    return false;
+  }
+
+  QDomElement qgisElem = mProjectParser->xmlDocument()->documentElement();
+  QDomElement mapCanvasElem = qgisElem.firstChildElement( "mapcanvas" );
+  if ( mapCanvasElem.isNull() )
+  {
+    return false;
+  }
+  QDomElement renderMapTileElem = mapCanvasElem.firstChildElement( "rendermaptile" );
+  if ( renderMapTileElem.isNull() )
+  {
+    return false;
+  }
+
+  return ( renderMapTileElem.text() == "1" );
+}
+
 QDomElement QgsWMSProjectParser::composerByName( const QString& composerName ) const
 {
   QDomElement composerElem;

src/server/qgswmsprojectparser.h

@@ -127,6 +127,9 @@ class SERVER_EXPORT QgsWMSProjectParser : public QgsWMSConfigParser
 
     bool useLayerIDs() const override { return mProjectParser->useLayerIDs(); }
 
+    /** True if tile render mode is enabled in the configuration*/
+    bool tileRenderMode() const override;
+
   private:
     QgsServerProjectParser* mProjectParser;
 #ifdef HAVE_SERVER_PYTHON_PLUGINS

src/server/qgswmsserver.cpp

@@ -2103,6 +2103,7 @@ int QgsWMSServer::configureMapRender( const QPaintDevice* paintDevice ) const
 
   mMapRenderer->clearLayerCoordinateTransforms();
   mMapRenderer->setOutputSize( QSize( paintDevice->width(), paintDevice->height() ), paintDevice->logicalDpiX() );
+  mMapRenderer->setTileRenderMode( mConfigParser->tileRenderMode() );
 
   //map extent
   bool bboxOk = true;