From 4abaf13598b751a4e849cf129ff1084e191a9ccb Mon Sep 17 00:00:00 2001
From: Will Miles <will@willmiles.net>
Date: Sat, 7 Jun 2025 11:08:11 -0400
Subject: [PATCH] Fix Segment::fade_out for 2d expansion

Since we're using get/setPixelColorRaw, we need the true length, not
the virtual length.
---
 wled00/FX_fcn.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 438c36d5a..34d668e3e 100755
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -989,7 +989,8 @@ void Segment::fade_out(uint8_t rate) const {
   if (!isActive()) return; // not active
   rate = (256-rate) >> 1;
   const int mappedRate = 256 / (rate + 1);
-  for (unsigned j = 0; j < vLength(); j++) {
+  const size_t length = is2D() ? (vWidth() * vHeight()) : vLength();
+  for (unsigned j = 0; j < length; j++) {
     uint32_t color = getPixelColorRaw(j);
     if (color == colors[1]) continue; // already at target color
     for (int i = 0; i < 32; i += 8) {