Hopefully finally fix tempo curve flickering.

diff --git a/libs/canvas/framed_curve.cc b/libs/canvas/framed_curve.cc
index 6bd2f740b0d435fe5666374720573062307d97e2..e8dee85c68d9a238015d7c57d8805aae5e04ad51 100644 (file)
--- a/libs/canvas/framed_curve.cc
+++ b/libs/canvas/framed_curve.cc
@@ -55,7 +55,7 @@ FramedCurve::set_points_per_segment (uint32_t n)
           just need to schedule a redraw rather than notify the parent of any
           changes
        */
-       points_per_segment = n;
+       points_per_segment = max (n, (uint32_t) 3);
        interpolate ();
        redraw ();
 }
@@ -187,13 +187,13 @@ FramedCurve::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) c
                Points::size_type left = 0;
                Points::size_type right = n_samples;
 
-               for (Points::size_type idx = 0; idx < n_samples; ++idx) {
+               for (Points::size_type idx = 0; idx < n_samples - 1; ++idx) {
                        window_space = item_to_window (Duple (samples[idx].x, 0.0));
                        if (window_space.x >= draw.x0) break;
                        left = idx;
                }
 
-               for (Points::size_type idx = n_samples; idx > left + 2; --idx) {
+               for (Points::size_type idx = n_samples; idx > left + 1; --idx) {
                        window_space = item_to_window (Duple (samples[idx].x, 0.0));
                        if (window_space.x <= draw.x1) break;
                        right = idx;