From 20e5c014efbf7a060f86dffb5c94803cc8091f9e Mon Sep 17 00:00:00 2001
From: Ty <Hypaethral@users.noreply.github.com>
Date: Thu, 3 Jul 2025 21:23:11 -0700
Subject: [PATCH] PlaylistView: support alpha channel in background images

---
 src/playlist/playlistview.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/playlist/playlistview.cpp b/src/playlist/playlistview.cpp
index eb202bc1e..9035d23cb 100644
--- a/src/playlist/playlistview.cpp
+++ b/src/playlist/playlistview.cpp
@@ -1468,10 +1468,10 @@ void PlaylistView::set_background_image(const QImage &image) {
   }
 
   if (!background_image_.isNull()) {
-    // Apply opacity filter
+    // Apply opacity filter: scale (not overwrite!) the alpha channel
     uchar *bits = background_image_.bits();
     for (int i = 0; i < background_image_.height() * background_image_.bytesPerLine(); i += 4) {
-      bits[i + 3] = static_cast<uchar>((opacity_level_ / 100.0) * 255);
+      bits[i + 3] = static_cast<uchar>(bits[i + 3] * (opacity_level_ / 100.0));
     }
 
     if (blur_radius_ != 0) {