fix clamping of line and rect coordinates to avoid issues with cairo when drawing way outside a surface's dimensions; move various coordinate methods down to Canvas, because they don't require GTK information; make visible_area() a Canvas virtual method so that we don't have to cast to call it

1 files changed, 3 insertions, 8 deletions

diff --git a/libs/canvas/line.cc b/libs/canvas/line.cc
index 7baa0e1e73..2894a80a89 100644
--- a/libs/canvas/line.cc
+++ b/libs/canvas/line.cc
@@ -24,6 +24,7 @@
 #include "canvas/types.h"
 #include "canvas/debug.h"
 #include "canvas/utils.h"
+#include "canvas/canvas.h"
 
 using namespace std;
 using namespace ArdourCanvas;
@@ -55,14 +56,8 @@ void
 Line::render (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
 {
 	setup_outline_context (context);
-
-	Duple plot[2] = {
-		Duple (min (_points[0].x, CAIRO_MAX), min (_points[0].y, CAIRO_MAX)),
-		Duple (min (_points[1].x, CAIRO_MAX), min (_points[1].y, CAIRO_MAX))
-	};
-
-	context->move_to (plot[0].x, plot[0].y);
-	context->line_to (plot[1].x, plot[1].y);
+	context->move_to (_points[0].x, _points[0].y);
+	context->line_to (_points[1].x, _points[1].y);
 	context->stroke ();
 }