From 887c740c2e73555471d0d97aec43a2c9e9f07eab Mon Sep 17 00:00:00 2001
From: Seth Hillbrand <seth@kipro-pcb.com>
Date: Sat, 4 Feb 2023 11:11:04 +0100
Subject: [PATCH] Limit the number of potential netnames

Don't set text if outside of the clipbox.  Text is non-cached so will
get redrawn on zoom

Fixes https://gitlab.com/kicad/code/kicad/issues/13572
---
 pcbnew/pcb_painter.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pcbnew/pcb_painter.cpp b/pcbnew/pcb_painter.cpp
index 8c0984631d..0344e77f62 100644
--- a/pcbnew/pcb_painter.cpp
+++ b/pcbnew/pcb_painter.cpp
@@ -738,7 +738,9 @@ void PCB_PAINTER::draw( const PCB_TRACK* aTrack, int aLayer )
             VECTOR2I textPosition =
                       VECTOR2D( start ) * static_cast<double>( num_names - ii ) / ( num_names + 1 )
                     + VECTOR2D( end ) * static_cast<double>( ii + 1 ) / ( num_names + 1 );
-            m_gal->BitmapText( netName, textPosition, textOrientation );
+
+            if( clipBox.Contains( textPosition ) )
+                m_gal->BitmapText( netName, textPosition, textOrientation );
         }
 
         return;