Fix map renderer job DPI

fix-dpi.diff

diff --git a/src/core/qgsmaprendererjob.cpp b/src/core/qgsmaprendererjob.cpp
index 7b341d7..38f4f5d 100644
--- a/src/core/qgsmaprendererjob.cpp
+++ b/src/core/qgsmaprendererjob.cpp
@@ -242,6 +242,8 @@ LayerRenderJobs QgsMapRendererJob::prepareJobs( QPainter* painter, QgsPalLabelin
         layerJobs.removeLast();
         continue;
       }
+      mypFlattenedImage->setDotsPerMeterX( mSettings.outputDpi() / 25.4 * 1000 );
+      mypFlattenedImage->setDotsPerMeterY( mSettings.outputDpi() / 25.4 * 1000 );
       mypFlattenedImage->fill( 0 );
 
       job.img = mypFlattenedImage;
@@ -305,6 +307,8 @@ void QgsMapRendererJob::cleanupJobs( LayerRenderJobs& jobs )
 QImage QgsMapRendererJob::composeImage( const QgsMapSettings& settings, const LayerRenderJobs& jobs )
 {
   QImage image( settings.outputSize(), settings.outputImageFormat() );
+  image.setDotsPerMeterX( settings.outputDpi() / 25.4 * 1000 );
+  image.setDotsPerMeterY( settings.outputDpi() / 25.4 * 1000 );
   image.fill( settings.backgroundColor().rgb() );
 
   QPainter painter( &image );
diff --git a/src/core/qgsmaprenderersequentialjob.cpp b/src/core/qgsmaprenderersequentialjob.cpp
index d2792f5..8f43630 100644
--- a/src/core/qgsmaprenderersequentialjob.cpp
+++ b/src/core/qgsmaprenderersequentialjob.cpp
@@ -29,6 +29,8 @@ QgsMapRendererSequentialJob::QgsMapRendererSequentialJob( const QgsMapSettings&
   QgsDebugMsg( "SEQUENTIAL construct" );
 
   mImage = QImage( mSettings.outputSize(), mSettings.outputImageFormat() );
+  mImage.setDotsPerMeterX( settings.outputDpi() / 25.4 * 1000 );
+  mImage.setDotsPerMeterY( settings.outputDpi() / 25.4 * 1000 );
 }
 
 QgsMapRendererSequentialJob::~QgsMapRendererSequentialJob()