Feature #8725: 'AA' disabling uses layer cfg

'AA' disabling for '1-pixel geometries' uses the layer simplification
configuration

Author: ahuarte47

src/core/qgsvectorlayer.cpp

@@ -694,7 +694,7 @@ bool QgsVectorLayer::draw( QgsRenderContext& rendererContext )
                                      .setSubsetOfAttributes( attributes );
 
   // Enable the simplification of the geometries before fetch the features using the current map2pixel context.
-  if ( mSimplifyDrawing && !mEditBuffer && !(featureRequest.flags() & QgsFeatureRequest::NoGeometry) )
+  if ( simplifyDrawingCanbeApplied() && !(featureRequest.flags() & QgsFeatureRequest::NoGeometry) )
   {
     QPainter* p = rendererContext.painter();
     float dpi = ( p->device()->logicalDpiX() + p->device()->logicalDpiY() ) / 2;

src/core/qgsvectorlayer.h

@@ -1374,6 +1374,9 @@ class CORE_EXPORT QgsVectorLayer : public QgsMapLayer
     /** Returns whether is enabled the map2pixel simplification of geometries for fast rendering of features */
     bool simplifyDrawing() const { return mSimplifyDrawing; }
 
+    /** Returns whether the VectorLayer can apply geometry simplification in FeatureRequests */
+    bool simplifyDrawingCanbeApplied() const { return mSimplifyDrawing && !mEditBuffer; }
+
   public slots:
     /**
      * Select feature by its ID

src/core/symbology-ng/qgslinesymbollayerv2.cpp

@@ -181,10 +181,10 @@ 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 ( points.size()<=2 && QgsFeatureRequest::canbeGeneralizedByWndBoundingBox( points, context.layer() ? context.layer()->simplifyDrawingTol() : QgsFeatureRequest::MAPTOPIXEL_THRESHOLD_DEFAULT ) && p->renderHints() & QPainter::Antialiasing )
+  if ( points.size()<=2 && context.layer() && context.layer()->simplifyDrawingCanbeApplied() && QgsFeatureRequest::canbeGeneralizedByWndBoundingBox( points, context.layer()->simplifyDrawingTol() ) && p->renderHints() & QPainter::Antialiasing )
   {
     p->setRenderHint( QPainter::Antialiasing, false );
-    p->drawPolyline ( points );
+    p->drawPolyline( points );
     p->setRenderHint( QPainter::Antialiasing, true );
     return;
   }

src/core/symbology-ng/qgssymbollayerv2.cpp

@@ -358,7 +358,7 @@ 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 ( points.size()<=5 && QgsFeatureRequest::canbeGeneralizedByWndBoundingBox( points, context.layer() ? context.layer()->simplifyDrawingTol() : QgsFeatureRequest::MAPTOPIXEL_THRESHOLD_DEFAULT ) && p->renderHints() & QPainter::Antialiasing )
+  if ( points.size()<=5 && context.layer() && context.layer()->simplifyDrawingCanbeApplied() && QgsFeatureRequest::canbeGeneralizedByWndBoundingBox( points, context.layer()->simplifyDrawingTol() ) && p->renderHints() & QPainter::Antialiasing )
   {
     p->setRenderHint( QPainter::Antialiasing, false );
     p->drawConvexPolygon( points );

src/core/symbology-ng/qgssymbolv2.cpp

@@ -34,7 +34,7 @@
 #include <cmath>
 
 QgsSymbolV2::QgsSymbolV2( SymbolType type, QgsSymbolLayerV2List layers )
-    : mType( type ), mLayers( layers ), mAlpha( 1.0 ), mRenderHints( 0 )
+    : mType( type ), mLayers( layers ), mAlpha( 1.0 ), mRenderHints( 0 ), mLayer( NULL )
 {
 
   // check they're all correct symbol layers
@@ -215,17 +215,24 @@ bool QgsSymbolV2::changeSymbolLayer( int index, QgsSymbolLayerV2* layer )
 
 void QgsSymbolV2::startRender( QgsRenderContext& context, const QgsVectorLayer* layer )
 {
+  mLayer = layer;
+
   QgsSymbolV2RenderContext symbolContext( context, outputUnit(), mAlpha, false, mRenderHints );
-  symbolContext.setLayer( layer );
+  symbolContext.setLayer( mLayer );
+
   for ( QgsSymbolLayerV2List::iterator it = mLayers.begin(); it != mLayers.end(); ++it )
     ( *it )->startRender( symbolContext );
 }
 
 void QgsSymbolV2::stopRender( QgsRenderContext& context )
 {
   QgsSymbolV2RenderContext symbolContext( context, outputUnit(), mAlpha, false, mRenderHints );
+  symbolContext.setLayer( mLayer );
+
   for ( QgsSymbolLayerV2List::iterator it = mLayers.begin(); it != mLayers.end(); ++it )
     ( *it )->stopRender( symbolContext );
+
+  mLayer = NULL;
 }
 
 void QgsSymbolV2::setColor( const QColor& color )
@@ -252,6 +259,8 @@ void QgsSymbolV2::drawPreviewIcon( QPainter* painter, QSize size )
 {
   QgsRenderContext context = QgsSymbolLayerV2Utils::createRenderContext( painter );
   QgsSymbolV2RenderContext symbolContext( context, outputUnit(), mAlpha, false, mRenderHints );
+  symbolContext.setLayer( mLayer );
+
   for ( QgsSymbolLayerV2List::iterator it = mLayers.begin(); it != mLayers.end(); ++it )
   {
     if ( mType == Fill && ( *it )->type() == Line )
@@ -532,6 +541,8 @@ QgsSymbolV2::ScaleMethod QgsMarkerSymbolV2::scaleMethod()
 void QgsMarkerSymbolV2::renderPoint( const QPointF& point, const QgsFeature* f, QgsRenderContext& context, int layer, bool selected )
 {
   QgsSymbolV2RenderContext symbolContext( context, outputUnit(), mAlpha, selected, mRenderHints, f );
+  symbolContext.setLayer( mLayer );
+
   if ( layer != -1 )
   {
     if ( layer >= 0 && layer < mLayers.count() )
@@ -600,6 +611,8 @@ double QgsLineSymbolV2::width()
 void QgsLineSymbolV2::renderPolyline( const QPolygonF& points, const QgsFeature* f, QgsRenderContext& context, int layer, bool selected )
 {
   QgsSymbolV2RenderContext symbolContext( context, outputUnit(), mAlpha, selected, mRenderHints, f );
+  symbolContext.setLayer( mLayer );
+
   if ( layer != -1 )
   {
     if ( layer >= 0 && layer < mLayers.count() )
@@ -635,6 +648,8 @@ QgsFillSymbolV2::QgsFillSymbolV2( QgsSymbolLayerV2List layers )
 void QgsFillSymbolV2::renderPolygon( const QPolygonF& points, QList<QPolygonF>* rings, const QgsFeature* f, QgsRenderContext& context, int layer, bool selected )
 {
   QgsSymbolV2RenderContext symbolContext( context, outputUnit(), mAlpha, selected, mRenderHints, f );
+  symbolContext.setLayer( mLayer );
+
   if ( layer != -1 )
   {
     if ( layer >= 0 && layer < mLayers.count() )

src/core/symbology-ng/qgssymbolv2.h

@@ -128,6 +128,9 @@ class CORE_EXPORT QgsSymbolV2
 
     QSet<QString> usedAttributes() const;
 
+    void setLayer( const QgsVectorLayer* layer ) { mLayer = layer; }
+    const QgsVectorLayer* layer() const { return mLayer; }
+
   protected:
     QgsSymbolV2( SymbolType type, QgsSymbolLayerV2List layers ); // can't be instantiated
 
@@ -145,6 +148,8 @@ class CORE_EXPORT QgsSymbolV2
     qreal mAlpha;
 
     int mRenderHints;
+
+    const QgsVectorLayer* mLayer; //current vectorlayer
 };
 
 ///////////////////////