From d51c1c136e9d1e4580148e8cb7012e2b00bf62fc Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sat, 13 Jun 2020 20:38:36 +0200
Subject: [PATCH] LibGfx: Painter::draw_line() can just return early if alpha
 == 0

---
 Libraries/LibGfx/Painter.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Libraries/LibGfx/Painter.cpp b/Libraries/LibGfx/Painter.cpp
index a7ecb7a763..8288d7377e 100644
--- a/Libraries/LibGfx/Painter.cpp
+++ b/Libraries/LibGfx/Painter.cpp
@@ -1114,6 +1114,9 @@ void Painter::draw_pixel(const IntPoint& position, Color color, int thickness)
 
 void Painter::draw_line(const IntPoint& p1, const IntPoint& p2, Color color, int thickness, LineStyle style)
 {
+    if (color.alpha() == 0)
+        return;
+
     auto clip_rect = this->clip_rect();
 
     auto point1 = p1;