Hopefully fix visual glitches on dragging fade ins/outs.

git-svn-id: svn://localhost/ardour2/branches/3.0@8298 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 6 insertions, 3 deletions

diff --git a/gtk2_ardour/audio_region_view.cc b/gtk2_ardour/audio_region_view.cc
index c3a2903e8b..51a016d2c3 100644
--- a/gtk2_ardour/audio_region_view.cc
+++ b/gtk2_ardour/audio_region_view.cc
@@ -588,8 +588,9 @@ AudioRegionView::reset_fade_in_shape_width (framecnt_t width)
 	width = std::max ((framecnt_t) 64, width);
 
 	Points* points;
-	
-	double pwidth = width / samples_per_unit;
+
+	/* round here to prevent little visual glitches with sub-pixel placement */
+	double const pwidth = rint (width / samples_per_unit);
 	uint32_t npoints = std::min (gdk_screen_width(), (int) pwidth);
 	double h;
 
@@ -674,7 +675,9 @@ AudioRegionView::reset_fade_out_shape_width (framecnt_t width)
 	width = std::max ((framecnt_t) 64, width);
 
 	Points* points;
-	double pwidth = width / samples_per_unit;
+
+	/* round here to prevent little visual glitches with sub-pixel placement */
+	double const pwidth = rint (width / samples_per_unit);
 	uint32_t npoints = std::min (gdk_screen_width(), (int) pwidth);
 	double h;