Disable RenderPartialOutput Setting in printing. It is unused in printing, even worse it causes the creation of a background QImage, which is a memory problem in large-format printing

mhugent · mhugent · commit 31a957185506 · 2018-05-22T17:55:14.000+02:00
diff --git a/src/core/composer/qgscomposermap.cpp b/src/core/composer/qgscomposermap.cpp
@@ -236,6 +236,7 @@ QgsMapSettings QgsComposerMap::mapSettings( const QgsRectangle& extent, QSizeF s
   {
     //if outputing composer, disable optimisations like layer simplification
     jobMapSettings.setFlag( QgsMapSettings::UseRenderingOptimization, false );
+    jobMapSettings.setFlag( QgsMapSettings::RenderPartialOutput, false );
   }
 
   QgsExpressionContext* context = createExpressionContext();

Original file line number	Diff line number	Diff line change
`@@ -236,6 +236,7 @@ QgsMapSettings QgsComposerMap::mapSettings( const QgsRectangle& extent, QSizeF s`
`236`	`236`	`{`
`237`	`237`	`//if outputing composer, disable optimisations like layer simplification`
`238`	`238`	`jobMapSettings.setFlag( QgsMapSettings::UseRenderingOptimization, false );`
	`239`	`+ jobMapSettings.setFlag( QgsMapSettings::RenderPartialOutput, false );`
`239`	`240`	`}`
`240`	`241`
`241`	`242`	`QgsExpressionContext* context = createExpressionContext();`