Removed use of QgsMapRenderer::rendererContext()

Deprecated QImage/QPixmap switch in QgsMapCanvas

Author: wonder-sk

src/app/qgisapp.cpp

@@ -2063,7 +2063,6 @@ void QgisApp::createOverview()
   QSettings mySettings;
   // Anti Aliasing enabled by default as of QGIS 1.7
   mMapCanvas->enableAntiAliasing( mySettings.value( "/qgis/enable_anti_aliasing", true ).toBool() );
-  mMapCanvas->useImageToRender( mySettings.value( "/qgis/use_qimage_to_render", true ).toBool() );
 
   int action = mySettings.value( "/qgis/wheel_action", 2 ).toInt();
   double zoomFactor = mySettings.value( "/qgis/zoom_factor", 2 ).toDouble();
@@ -6790,7 +6789,6 @@ void QgisApp::options()
     setTheme( optionsDialog->theme() );
 
     mMapCanvas->enableAntiAliasing( mySettings.value( "/qgis/enable_anti_aliasing" ).toBool() );
-    mMapCanvas->useImageToRender( mySettings.value( "/qgis/use_qimage_to_render" ).toBool() );
 
     int action = mySettings.value( "/qgis/wheel_action", 2 ).toInt();
     double zoomFactor = mySettings.value( "/qgis/zoom_factor", 2 ).toDouble();

src/app/qgsmaptoolrotatepointsymbols.cpp

@@ -270,17 +270,7 @@ void QgsMapToolRotatePointSymbols::createPixmapItem( QgsFeature& f )
     return;
   }
 
-  //get reference to current render context
-  QgsMapRenderer* mapRenderer = mCanvas->mapRenderer();
-  if ( !mapRenderer )
-  {
-    return;
-  }
-  QgsRenderContext* renderContext = mCanvas->mapRenderer()->rendererContext();
-  if ( !renderContext )
-  {
-    return;
-  }
+  QgsRenderContext renderContext( QgsRenderContext::fromMapSettings( mCanvas->mapSettings() ) );
 
   //get the image that is used for that symbol, but without point rotation
   QImage pointImage;
@@ -289,14 +279,14 @@ void QgsMapToolRotatePointSymbols::createPixmapItem( QgsFeature& f )
   {
     QgsFeatureRendererV2* rv2 = mActiveLayer->rendererV2()->clone();
     rv2->setRotationField( "" );
-    rv2->startRender( *renderContext, mActiveLayer );
+    rv2->startRender( renderContext, mActiveLayer );
 
     QgsSymbolV2* symbolV2 = rv2->symbolForFeature( f );
     if ( symbolV2 )
     {
       pointImage = symbolV2->bigSymbolPreviewImage();
     }
-    rv2->stopRender( *renderContext );
+    rv2->stopRender( renderContext );
     delete rv2;
   }
 

src/core/qgsmaprendererjob.cpp

@@ -200,21 +200,8 @@ void QgsMapRendererCustomPainterJob::startRender()
   renderTime.start();
 #endif
 
-  mRenderContext.setMapToPixel( mSettings.mapToPixel() );
-  mRenderContext.setExtent( mSettings.visibleExtent() );
-  mRenderContext.setDrawEditingInformation( mSettings.testFlag( QgsMapSettings::DrawEditingInfo ) );
-  mRenderContext.setForceVectorOutput( mSettings.testFlag( QgsMapSettings::ForceVectorOutput ) );
-  mRenderContext.setUseAdvancedEffects( mSettings.testFlag( QgsMapSettings::UseAdvancedEffects ) );
+  mRenderContext = QgsRenderContext::fromMapSettings( mSettings );
   mRenderContext.setPainter( mPainter );
-  mRenderContext.setCoordinateTransform( 0 );
-  mRenderContext.setSelectionColor( mSettings.selectionColor() );
-  mRenderContext.setRasterScaleFactor( 1.0 );
-  mRenderContext.setScaleFactor( mSettings.outputDpi() / 25.4 ); // = pixels per mm
-  mRenderContext.setRendererScale( mSettings.scale() );
-
-  //this flag is only for stopping during the current rendering progress,
-  //so must be false at every new render operation
-  mRenderContext.setRenderingStopped( false );
 
   mRenderContext.setLabelingEngine( mLabelingEngine );
   if ( mLabelingEngine )

src/core/qgsrendercontext.cpp

@@ -18,6 +18,8 @@
 
 #include "qgsrendercontext.h"
 
+#include "qgsmapsettings.h"
+
 QgsRenderContext::QgsRenderContext()
     : mPainter( 0 ),
     mCoordTransform( 0 ),
@@ -37,6 +39,27 @@ QgsRenderContext::~QgsRenderContext()
 {
 }
 
+QgsRenderContext QgsRenderContext::fromMapSettings( const QgsMapSettings& mapSettings )
+{
+  QgsRenderContext ctx;
+  ctx.setMapToPixel( mapSettings.mapToPixel() );
+  ctx.setExtent( mapSettings.visibleExtent() );
+  ctx.setDrawEditingInformation( mapSettings.testFlag( QgsMapSettings::DrawEditingInfo ) );
+  ctx.setForceVectorOutput( mapSettings.testFlag( QgsMapSettings::ForceVectorOutput ) );
+  ctx.setUseAdvancedEffects( mapSettings.testFlag( QgsMapSettings::UseAdvancedEffects ) );
+  ctx.setCoordinateTransform( 0 );
+  ctx.setSelectionColor( mapSettings.selectionColor() );
+  ctx.setRasterScaleFactor( 1.0 );
+  ctx.setScaleFactor( mapSettings.outputDpi() / 25.4 ); // = pixels per mm
+  ctx.setRendererScale( mapSettings.scale() );
+
+  //this flag is only for stopping during the current rendering progress,
+  //so must be false at every new render operation
+  ctx.setRenderingStopped( false );
+
+  return ctx;
+}
+
 void QgsRenderContext::setCoordinateTransform( const QgsCoordinateTransform* t )
 {
   mCoordTransform = t;

src/core/qgsrendercontext.h

@@ -27,6 +27,7 @@
 class QPainter;
 
 class QgsLabelingEngineInterface;
+class QgsMapSettings;
 
 /** \ingroup core
  * Contains information about the context of a rendering operation.
@@ -40,6 +41,9 @@ class CORE_EXPORT QgsRenderContext
     QgsRenderContext();
     ~QgsRenderContext();
 
+    //! create initialized QgsRenderContext instance from given QgsMapSettings
+    static QgsRenderContext fromMapSettings( const QgsMapSettings& mapSettings );
+
     //getters
 
     QPainter* painter() {return mPainter;}

src/gui/qgsmapcanvas.cpp

@@ -186,8 +186,6 @@ void QgsMapCanvas::enableAntiAliasing( bool theFlag )
 void QgsMapCanvas::useImageToRender( bool theFlag )
 {
   Q_UNUSED(theFlag);
-  //mMap->useImageToRender( theFlag );
-  //refresh(); // redraw the map on change - prevents black map view
 }
 
 QgsMapCanvasMap* QgsMapCanvas::map()
@@ -476,11 +474,7 @@ void QgsMapCanvas::refresh()
 
 void QgsMapCanvas::stopRendering()
 {
-  QgsRenderContext* mypRenderContext = mMapRenderer->rendererContext();
-  if ( mypRenderContext )
-  {
-    mypRenderContext->setRenderingStopped( true );
-  }
+  // TODO: implement stopping (?)
 }
 
 void QgsMapCanvas::updateMap()

src/gui/qgsmapcanvas.h

@@ -278,7 +278,8 @@ class GUI_EXPORT QgsMapCanvas : public QGraphicsView
     bool antiAliasingEnabled() const { return mSettings.testFlag( QgsMapSettings::Antialiasing ); }
 
     //! Select which Qt class to render with
-    void useImageToRender( bool theFlag );
+    //! @deprecated since 2.1 - does nothing because now we always render to QImage
+    Q_DECL_DEPRECATED void useImageToRender( bool theFlag );
 
     // following 2 methods should be moved elsewhere or changed to private
     // currently used by pan map tool

src/gui/qgsmaptoolidentify.cpp

@@ -313,11 +313,12 @@ bool QgsMapToolIdentify::identifyVectorLayer( QList<IdentifyResult> *results, Qg
 
   bool filter = false;
 
+  QgsRenderContext context( QgsRenderContext::fromMapSettings( mCanvas->mapSettings() ) );
   QgsFeatureRendererV2* renderer = layer->rendererV2();
   if ( renderer && renderer->capabilities() & QgsFeatureRendererV2::ScaleDependent )
   {
     // setup scale for scale dependent visibility (rule based)
-    renderer->startRender( *( mCanvas->mapRenderer()->rendererContext() ), layer );
+    renderer->startRender( context, layer );
     filter = renderer->capabilities() & QgsFeatureRendererV2::Filter;
   }
 
@@ -341,7 +342,7 @@ bool QgsMapToolIdentify::identifyVectorLayer( QList<IdentifyResult> *results, Qg
 
   if ( renderer && renderer->capabilities() & QgsFeatureRendererV2::ScaleDependent )
   {
-    renderer->stopRender( *( mCanvas->mapRenderer()->rendererContext() ) );
+    renderer->stopRender( context );
   }
 
   QgsDebugMsg( "Feature count on identify: " + QString::number( featureCount ) );