X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fviews%2Ftrace%2Fanalogsignal.cpp;h=3430ab3cf48eb6996ca0cd52901c1d9c884aa4cb;hp=599246418b1993bd74ffaf1d9c51a1e14a2b860d;hb=a47b5a3fb9912f1d6e3fcc63d59ee6cc1b5338e2;hpb=633e8ade5289eff00c7137f59269361aa547449a

diff --git a/pv/views/trace/analogsignal.cpp b/pv/views/trace/analogsignal.cpp
index 59924641..3430ab3c 100644
--- a/pv/views/trace/analogsignal.cpp
+++ b/pv/views/trace/analogsignal.cpp
@@ -319,7 +319,7 @@ void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 
 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 {
-	bool wasAntialiased = p.testRenderHint(QPainter::Antialiasing);
+	bool was_antialiased = p.testRenderHint(QPainter::Antialiasing);
 	p.setRenderHint(QPainter::Antialiasing, false);
 
 	if (pos_vdivs_ > 0) {
@@ -364,7 +364,7 @@ void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 		}
 	}
 
-	p.setRenderHint(QPainter::Antialiasing, wasAntialiased);
+	p.setRenderHint(QPainter::Antialiasing, was_antialiased);
 }
 
 void AnalogSignal::paint_trace(QPainter &p,
@@ -444,7 +444,9 @@ void AnalogSignal::paint_trace(QPainter &p,
 	}
 	delete[] sample_block;
 
-	p.drawPolyline(points, points_count);
+	// QPainter::drawPolyline() is slow, let's paint the lines ourselves
+	for (int64_t i = 1; i < points_count; i++)
+		p.drawLine(points[i - 1], points[i]);
 
 	if (show_sampling_points) {
 		if (paint_thr_dots) {