Enable disabled simplification code after merge MTR (2-2)

Enable AntialiasingSimplification

python/core/qgsrendercontext.sip

@@ -72,4 +72,8 @@ class QgsRenderContext
     /**Returns true if the rendering optimization (geometry simplification) can be executed*/
     bool useRenderingOptimization() const;
     void setUseRenderingOptimization( bool enabled );
+
+    //! Added in QGIS v2.4
+    const QgsVectorSimplifyMethod& vectorSimplifyMethod() const;
+    void setVectorSimplifyMethod( const QgsVectorSimplifyMethod& simplifyMethod );
 };

src/core/qgsrendercontext.cpp

@@ -33,7 +33,7 @@ QgsRenderContext::QgsRenderContext()
     mLabelingEngine( NULL ),
     mUseRenderingOptimization( true )
 {
-
+    mVectorSimplifyMethod.setSimplifyHints( QgsVectorSimplifyMethod::NoSimplification );
 }
 
 QgsRenderContext::~QgsRenderContext()

src/core/qgsrendercontext.h

@@ -23,6 +23,7 @@
 #include "qgscoordinatetransform.h"
 #include "qgsmaptopixel.h"
 #include "qgsrectangle.h"
+#include "qgsvectorsimplifymethod.h"
 
 class QPainter;
 
@@ -104,6 +105,10 @@ class CORE_EXPORT QgsRenderContext
     bool useRenderingOptimization() const { return mUseRenderingOptimization; }
     void setUseRenderingOptimization( bool enabled ) { mUseRenderingOptimization = enabled; }
 
+    //! Added in QGIS v2.4
+    const QgsVectorSimplifyMethod& vectorSimplifyMethod() const { return mVectorSimplifyMethod; }
+    void setVectorSimplifyMethod( const QgsVectorSimplifyMethod& simplifyMethod ) { mVectorSimplifyMethod = simplifyMethod; }
+
   private:
 
     /**Painter for rendering operations*/
@@ -145,6 +150,9 @@ class CORE_EXPORT QgsRenderContext
 
     /**True if the rendering optimization (geometry simplification) can be executed*/
     bool mUseRenderingOptimization;
+
+    /**Simplification object which holds the information about how to simplify the features for fast rendering */
+    QgsVectorSimplifyMethod mVectorSimplifyMethod;
 };
 
 #endif

src/core/qgsvectorlayerrenderer.cpp

@@ -169,6 +169,15 @@ bool QgsVectorLayerRenderer::render()
     simplifyMethod.setForceLocalOptimization( mSimplifyMethod.forceLocalOptimization() );
 
     featureRequest.setSimplifyMethod( simplifyMethod );
+
+    QgsVectorSimplifyMethod vectorMethod = mSimplifyMethod;
+    mContext.setVectorSimplifyMethod( vectorMethod );
+  }
+  else
+  {
+    QgsVectorSimplifyMethod vectorMethod;
+    vectorMethod.setSimplifyHints( QgsVectorSimplifyMethod::NoSimplification );
+    mContext.setVectorSimplifyMethod( vectorMethod );
   }
 
   QgsFeatureIterator fit = mSource->getFeatures( featureRequest );

src/core/symbology-ng/qgslinesymbollayerv2.cpp

@@ -258,15 +258,13 @@ void QgsSimpleLineSymbolLayerV2::renderPolyline( const QPolygonF& points, QgsSym
   p->setPen( context.selected() ? mSelPen : mPen );
 
   // Disable 'Antialiasing' if the geometry was generalized in the current RenderContext (We known that it must have least #2 points).
-#if 0 // TODO[MD]: after merge
+  if ( points.size() <= 2 && ( context.renderContext().vectorSimplifyMethod().simplifyHints() & QgsVectorSimplifyMethod::AntialiasingSimplification ) && QgsAbstractGeometrySimplifier::canbeGeneralizedByDeviceBoundingBox( points, context.renderContext().vectorSimplifyMethod().threshold() ) && ( p->renderHints() & QPainter::Antialiasing ) )
-  if ( points.size() <= 2 && context.layer() && context.layer()->simplifyDrawingCanbeApplied( context.renderContext(), QgsVectorSimplifyMethod::AntialiasingSimplification ) && QgsAbstractGeometrySimplifier::canbeGeneralizedByDeviceBoundingBox( points, context.layer()->simplifyMethod().threshold() ) && ( p->renderHints() & QPainter::Antialiasing ) )
   {
     p->setRenderHint( QPainter::Antialiasing, false );
     p->drawPolyline( points );
     p->setRenderHint( QPainter::Antialiasing, true );
     return;
   }
-#endif
 
   if ( offset == 0 )
   {

src/core/symbology-ng/qgssymbollayerv2.cpp

@@ -427,15 +427,13 @@ void QgsFillSymbolLayerV2::_renderPolygon( QPainter* p, const QPolygonF& points,
   }
 
   // Disable 'Antialiasing' if the geometry was generalized in the current RenderContext (We known that it must have least #5 points).
-#if 0 // TODO[MD]: after merge
+  if ( points.size() <= 5 && ( context.renderContext().vectorSimplifyMethod().simplifyHints() & QgsVectorSimplifyMethod::AntialiasingSimplification ) && QgsAbstractGeometrySimplifier::canbeGeneralizedByDeviceBoundingBox( points, context.renderContext().vectorSimplifyMethod().threshold() ) && ( p->renderHints() & QPainter::Antialiasing ) )
-  if ( points.size() <= 5 && context.layer() && context.layer()->simplifyDrawingCanbeApplied( context.renderContext(), QgsVectorSimplifyMethod::AntialiasingSimplification ) && QgsAbstractGeometrySimplifier::canbeGeneralizedByDeviceBoundingBox( points, context.layer()->simplifyMethod().threshold() ) && ( p->renderHints() & QPainter::Antialiasing ) )
   {
     p->setRenderHint( QPainter::Antialiasing, false );
     p->drawRect( points.boundingRect() );
     p->setRenderHint( QPainter::Antialiasing, true );
     return;
   }
-#endif
 
   if ( rings == NULL )
   {