From bc074869823b67acf76ee3fa5edccc5acb611fd0 Mon Sep 17 00:00:00 2001
From: Martin Dobias <wonder.sk@gmail.com>
Date: Tue, 18 Feb 2014 12:10:24 +0700
Subject: [PATCH] Re-enable geometry simplification while rendering

---
 src/core/qgsvectorlayerfeatureiterator.cpp |  3 ---
 src/core/qgsvectorlayerrenderer.cpp        | 15 ++++++++-------
 src/core/qgsvectorlayerrenderer.h          |  4 ++++
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/src/core/qgsvectorlayerfeatureiterator.cpp b/src/core/qgsvectorlayerfeatureiterator.cpp
index 5335d196af6..62d29dffdc6 100644
--- a/src/core/qgsvectorlayerfeatureiterator.cpp
+++ b/src/core/qgsvectorlayerfeatureiterator.cpp
@@ -62,9 +62,6 @@ QgsVectorLayerFeatureSource::QgsVectorLayerFeatureSource(QgsVectorLayer *layer)
       mChangedAttributeValues = QgsChangedAttributesMap( layer->editBuffer()->changedAttributeValues() );
       mAddedAttributes = QList<QgsField>( layer->editBuffer()->addedAttributes() );
       mDeletedAttributeIds = QgsAttributeList( layer->editBuffer()->deletedAttributeIds() );        
-
-      // TODO[MD]: after merge
-      //mChangedFeaturesRequest.setFilterFids( L->editBuffer()->changedAttributeValues().keys().toSet() );
     //}
   }
 }
diff --git a/src/core/qgsvectorlayerrenderer.cpp b/src/core/qgsvectorlayerrenderer.cpp
index a562fb5db93..c9eae74ee90 100644
--- a/src/core/qgsvectorlayerrenderer.cpp
+++ b/src/core/qgsvectorlayerrenderer.cpp
@@ -42,6 +42,9 @@ QgsVectorLayerRenderer::QgsVectorLayerRenderer( QgsVectorLayer* layer, QgsRender
   mLayerTransparency = layer->layerTransparency();
   mFeatureBlendMode = layer->featureBlendMode();
 
+  mSimplifyMethod = layer->simplifyMethod();
+  mSimplifyGeometry = layer->simplifyDrawingCanbeApplied( mContext, QgsVectorLayer::GeometrySimplification );
+
   QSettings settings;
   mVertexMarkerOnlyForSelection = settings.value( "/qgis/digitizing/marker_only_for_selected", false ).toBool();
 
@@ -114,21 +117,20 @@ bool QgsVectorLayerRenderer::render()
                                       .setSubsetOfAttributes( mAttrNames, mFields );
 
   // enable the simplification of the geometries (Using the current map2pixel context) before send it to renderer engine.
-#if 0  //TODO[MD]: after merge
-  if ( simplifyDrawingCanbeApplied( mContext, QgsVectorLayer::GeometrySimplification ) )
+  if ( mSimplifyGeometry )
   {
-    QPainter* p = rendererContext.painter();
+    QPainter* p = mContext.painter();
     double dpi = ( p->device()->logicalDpiX() + p->device()->logicalDpiY() ) / 2;
     double map2pixelTol = mSimplifyMethod.threshold() * 96.0f / dpi;
 
-    const QgsMapToPixel& mtp = rendererContext.mapToPixel();
+    const QgsMapToPixel& mtp = mContext.mapToPixel();
     map2pixelTol *= mtp.mapUnitsPerPixel();
-    const QgsCoordinateTransform* ct = rendererContext.coordinateTransform();
+    const QgsCoordinateTransform* ct = mContext.coordinateTransform();
 
     // resize the tolerance using the change of size of an 1-BBOX from the source CoordinateSystem to the target CoordinateSystem
     if ( ct && !(( QgsCoordinateTransform* )ct )->isShortCircuited() )
     {
-      QgsPoint center = rendererContext.extent().center();
+      QgsPoint center = mContext.extent().center();
       double rectSize = ct->sourceCrs().geographicFlag() ?  0.0008983 /* ~100/(40075014/360=111319.4833) */ : 100;
 
       QgsRectangle sourceRect = QgsRectangle( center.x(), center.y(), center.x() + rectSize, center.y() + rectSize );
@@ -153,7 +155,6 @@ bool QgsVectorLayerRenderer::render()
 
     featureRequest.setSimplifyMethod( simplifyMethod );
   }
-#endif
 
   QgsFeatureIterator fit = mSource->getFeatures( featureRequest );
 
diff --git a/src/core/qgsvectorlayerrenderer.h b/src/core/qgsvectorlayerrenderer.h
index c6d661c4501..cebe86d48a2 100644
--- a/src/core/qgsvectorlayerrenderer.h
+++ b/src/core/qgsvectorlayerrenderer.h
@@ -22,6 +22,7 @@ typedef QList<int> QgsAttributeList;
 #include "qgsfield.h"  // QgsFields
 #include "qgsfeature.h"  // QgsFeatureIds
 #include "qgsfeatureiterator.h"
+#include "qgsvectorsimplifymethod.h"
 
 #include "qgsmaplayerrenderer.h"
 
@@ -86,6 +87,9 @@ protected:
 
   int mLayerTransparency;
   QPainter::CompositionMode mFeatureBlendMode;
+
+  QgsVectorSimplifyMethod mSimplifyMethod;
+  bool mSimplifyGeometry;
 };