From 239c340527bdaee84d51d2c61406caa419c07b02 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 22 Dec 2020 13:27:46 +0100
Subject: [PATCH] Do not show blank waveforms in case height is < 1px

Instead draw some lines to indicate that "something" is there.
---
 libs/waveview/wave_view.cc | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/libs/waveview/wave_view.cc b/libs/waveview/wave_view.cc
index 3a5c1b4fc0..4de84cbd5a 100644
--- a/libs/waveview/wave_view.cc
+++ b/libs/waveview/wave_view.cc
@@ -1020,7 +1020,17 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons
 		return;
 	}
 
-	if (draw.height () < 2) {
+	if (_props->height < 1) {
+			if (_props->channel % 2) {
+				return;
+			}
+			context->rectangle (draw.x0, draw.y0, draw.width (), draw.height ());
+			if (1 == (_props->channel % 3)) {
+				set_source_rgba (context, _props->zero_color);
+			} else {
+				set_source_rgba (context, _props->fill_color);
+			}
+			context->fill ();
 		return;
 	}