From 12215647f14c6c5e6e0b5523519602d6c5dffdd1 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Fri, 20 Jan 2023 19:08:39 +0000
Subject: [PATCH] Handler blind/buried/micro via drawing when all layers are
 hidden.

Fixes https://gitlab.com/kicad/code/kicad/issues/13607
---
 pcbnew/pcb_painter.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pcbnew/pcb_painter.cpp b/pcbnew/pcb_painter.cpp
index 57f0f7c46a..4e6c8db556 100644
--- a/pcbnew/pcb_painter.cpp
+++ b/pcbnew/pcb_painter.cpp
@@ -411,6 +411,16 @@ COLOR4D PCB_RENDER_SETTINGS::GetColor( const VIEW_ITEM* aItem, int aLayer ) cons
             }
         }
     }
+    else if( originalLayer == LAYER_VIA_BBLIND || originalLayer == LAYER_VIA_MICROVIA )
+    {
+        const PCB_VIA* via = static_cast<const PCB_VIA*>( item );
+        const BOARD*   board = via->GetBoard();
+        LSET           visibleLayers = board->GetVisibleLayers() & board->GetEnabledLayers();
+
+        // Target graphic is visible if the via crosses a visible layer
+        if( ( via->GetLayerSet() & visibleLayers ).none() )
+            color = COLOR4D::CLEAR;
+    }
 
     // Apply per-type opacity overrides
     if( item->Type() == PCB_TRACE_T || item->Type() == PCB_ARC_T )