fix waveform flickering during recording

diff --git a/libs/canvas/wave_view.cc b/libs/canvas/wave_view.cc
index 5a975895a3899c0f96dc788901a18a47b1d937a2..f4380494c8a08d218c16f69622303d6e721236ab 100644 (file)
--- a/libs/canvas/wave_view.cc
+++ b/libs/canvas/wave_view.cc
@@ -1230,13 +1230,12 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons
                 * draw or the available width of the image.
                 */
 
-               draw_width = min ((double) image_to_draw->image->get_width() - (draw_start - image_to_draw->start),
-                                 (draw_end - draw_start));
+               draw_width = min ((double) image_to_draw->image->get_width(), (draw_end - draw_start));
 
 
-               DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 draw just %2 of %3 (iwidth %4 off %5 img @ %6 rs @ %7)\n", name, draw_width, (draw_end - draw_start),
+               DEBUG_TRACE (DEBUG::WaveView, string_compose ("%1 draw just %2 of %3 @ %8 (iwidth %4 off %5 img @ %6 rs @ %7)\n", name, draw_width, (draw_end - draw_start),
                                                              image_to_draw->image->get_width(), image_origin_in_self_coordinates,
-                                                             image_to_draw->start, _region_start));
+                                                             image_to_draw->start, _region_start, draw_start));
        } else {
                draw_width = draw_end - draw_start;
                DEBUG_TRACE (DEBUG::WaveView, string_compose ("use current image, span entire render width %1..%2\n", draw_start, draw_end));