From aeed8b418c0e751d7fef6aeaea1347af2077f904 Mon Sep 17 00:00:00 2001
From: Joel Holdsworth <joel@airwebreathe.org.uk>
Date: Sat, 7 Jul 2012 08:16:38 +0100
Subject: [PATCH] Clip signal painting with glScissor

---
 sigview.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sigview.cpp b/sigview.cpp
index 8461af6..dea3cbc 100644
--- a/sigview.cpp
+++ b/sigview.cpp
@@ -86,6 +86,8 @@ void SigView::paintEvent(QPaintEvent *event)
 	glClear(GL_COLOR_BUFFER_BIT);
 
 	// Plot the signal
+	glEnable(GL_SCISSOR_TEST);
+	glScissor(LabelMarginWidth, 0, width(), height());
 	offset = RulerHeight;
 	BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
 	{
@@ -99,6 +101,8 @@ void SigView::paintEvent(QPaintEvent *event)
 		offset += SignalHeight;
 	}
 
+	glDisable(GL_SCISSOR_TEST);
+
 	// Prepare for QPainter rendering
 	glMatrixMode(GL_MODELVIEW);
 	glPopMatrix();
-- 
2.30.2