Plot area clipping fixed.

Author: simzer

CHANGELOG.md

@@ -2,13 +2,13 @@
 
 ## [Unreleased]
 
-## [0.3.2]
+## [0.3.2] - 2021-10-14
 ### Added
 
 - Parts of markers outside of plot area are getting clipped. This behaviour can 
   be controlled by style.plot.overflow parameter.
-- channel title parameter has "auto" value by default. "null" will title switch
-  off.
+- channel title parameter has "auto" value by default. "null" will switch the
+  title off.
 
 ### Fixed
 

src/chart/rendering/drawdiagram.cpp

@@ -31,19 +31,7 @@ drawDiagram::drawDiagram(const Geom::Rect &rect,
 
 	auto clip = style.plot.overflow == Styles::Overflow::hidden;
 
-	if (clip)
-	{
-		canvas.save();
-		
-		std::array<Geom::Point, 4> points =
-		{
-			Geom::Point(0.0, 0.0), 
-			Geom::Point(0.0, 1.0), 
-			Geom::Point(1.0, 1.0), 
-			Geom::Point(1.0, 0.0) 
-		};
-		painter.drawPolygon(points, true);
-	}
+	if (clip) clipPlotArea();
 
 	if (!drawOptions.onlyEssentials())
 	{
@@ -62,6 +50,23 @@ drawDiagram::drawDiagram(const Geom::Rect &rect,
 	}
 }
 
+void drawDiagram::clipPlotArea()
+{
+	canvas.save();
+	
+	std::array<Geom::Point, 4> points =
+	{
+		Geom::Point(0.0, 0.0), 
+		Geom::Point(0.0, 1.0), 
+		Geom::Point(1.0, 1.0), 
+		Geom::Point(1.0, 0.0) 
+	};
+	painter.setPolygonToCircleFactor(0.0);
+	painter.setPolygonStraightFactor(0.0);
+	painter.setResMode(ResolutionMode::High);
+	painter.drawPolygon(points, true);
+}
+
 void drawDiagram::drawMarkerGuides()
 {
 	auto &style = diagram.getStyle().plot.marker.guides;

src/chart/rendering/drawdiagram.h

@@ -25,6 +25,7 @@ class drawDiagram : private DrawingContext
 
 	Guides guides;
 
+	void clipPlotArea();
 	void drawMarkerGuides();
 	void drawMarkers();
 	void drawMarkerLabels();