File cairographicscontext.patch of Package vst3-Uhhyou-Plugins

diff --git a/vstgui/lib/platform/linux/cairographicscontext.cpp b/vstgui/lib/platform/linux/cairographicscontext.cpp
index ab620cc9..f9b735bf 100644
--- a/vstgui/lib/platform/linux/cairographicscontext.cpp
+++ b/vstgui/lib/platform/linux/cairographicscontext.cpp
@@ -406,15 +406,11 @@ bool CairoGraphicsDeviceContext::drawPolygon (const PointList& polygonPointList,
 	vstgui_assert (polygonPointList.empty () == false);
 	impl->doInContext ([&] () {
 		bool doPixelAlign = impl->state.drawMode.integralMode ();
-		auto last = polygonPointList.back ();
-		if (doPixelAlign)
-			last = pixelAlign (impl->state.tm, last);
-		cairo_move_to (impl->context, last.x, last.y);
-		for (auto p : polygonPointList)
+		auto first = polygonPointList.front ();
+		cairo_move_to (impl->context, first.x, first.y);
+		for (auto p = polygonPointList.begin () + 1; p != polygonPointList.end (); ++p)
 		{
-			if (doPixelAlign)
-				p = pixelAlign (impl->state.tm, p);
-			cairo_line_to (impl->context, p.x, p.y);
+			cairo_line_to (impl->context, (*p).x, (*p).y);
 		}
 		impl->draw (drawStyle);
 	});
@@ -448,15 +444,17 @@ bool CairoGraphicsDeviceContext::drawRect (CRect rect, PlatformGraphicsDrawStyle
 	return true;
 }
 
-//------------------------------------------------------------------------
+//------------------------------cairo_restore (------------------------------------------
 bool CairoGraphicsDeviceContext::drawArc (CRect rect, double startAngle1, double endAngle2,
 										  PlatformGraphicsDrawStyle drawStyle) const
 {
 	impl->doInContext ([&] () {
+		cairo_save (impl->context);
 		CPoint center = rect.getCenter ();
 		cairo_translate (impl->context, center.x, center.y);
-		cairo_scale (impl->context, 2.0 / rect.getWidth (), 2.0 / rect.getHeight ());
-		cairo_arc (impl->context, 0, 0, 1, startAngle1, endAngle2);
+		cairo_scale (impl->context, rect.getWidth () /2.0 , rect.getHeight () / 2.0);
+		cairo_arc (impl->context, 0, 0, 1, startAngle1 / 180.0 * M_PI, endAngle2 / 180.0 * M_PI);
+		cairo_restore (impl->context);
 		impl->draw (drawStyle);
 	});
 	return true;
@@ -468,7 +466,7 @@ bool CairoGraphicsDeviceContext::drawEllipse (CRect rect, PlatformGraphicsDrawSt
 	impl->doInContext ([&] () {
 		CPoint center = rect.getCenter ();
 		cairo_translate (impl->context, center.x, center.y);
-		cairo_scale (impl->context, 2.0 / rect.getWidth (), 2.0 / rect.getHeight ());
+		cairo_scale (impl->context, rect.getWidth () / 2.0, rect.getHeight () / 2.0);
 		cairo_arc (impl->context, 0, 0, 1, 0, 2 * M_PI);
 		impl->draw (drawStyle);
 	});