From 28a31ee6831a2b929d88887f5d49f869877c9226 Mon Sep 17 00:00:00 2001
From: Tommaso Negri <me@tommasongr.com>
Date: Tue, 11 Aug 2026 14:26:40 +0200
Subject: add background blur patch

---
 Sources/bar/bar.docc/patches.md                    |  1 +
 .../bar/bar.docc/patches/patch-background-blur.md  | 32 +++++++++++++++++
 .../patch-background_blur-20260811-10fed47.patch   | 40 ++++++++++++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 Sources/bar/bar.docc/patches/patch-background-blur.md
 create mode 100644 patches/patch-background_blur-20260811-10fed47.patch

diff --git a/Sources/bar/bar.docc/patches.md b/Sources/bar/bar.docc/patches.md
index de0514a..1b05ffe 100644
--- a/Sources/bar/bar.docc/patches.md
+++ b/Sources/bar/bar.docc/patches.md
@@ -88,6 +88,7 @@ To publish, upload the patch somewhere publicly accessible (e.g., the *bar* GitH
 ### Appearance
 
 - <doc:patch-font-offset>
+- <doc:patch-background-blur>
 
 ### Functionality
 
diff --git a/Sources/bar/bar.docc/patches/patch-background-blur.md b/Sources/bar/bar.docc/patches/patch-background-blur.md
new file mode 100644
index 0000000..2f6fc2b
--- /dev/null
+++ b/Sources/bar/bar.docc/patches/patch-background-blur.md
@@ -0,0 +1,32 @@
+# Background blur
+
+Set a backdrop blur to the entire bar.
+
+This patch adds a `backgroundBlur` option (Double) to ``Config``.
+Adjust the value to increase or decrease the blur effect behind the bar.
+
+```swift
+enum Config {
+	/// The blur amount used for the bar background.
+	static let backgroundBlur: Double = 10
+}
+```
+
+> Warning: This patch uses private Apple APIs.
+Future versions of macOS might break the functionality.
+
+## Installation
+
+```shell
+curl -sL https://raw.githubusercontent.com/paninihouse/bar/refs/heads/master/patches/patch-background_blur-20260811-10fed47.patch | patch -p1
+```
+
+After applying, rebuild the program:
+
+```shell
+make install
+```
+
+## Author
+
+Tommaso Negri [@tommasongr](https://github.com/tommasongr)
diff --git a/patches/patch-background_blur-20260811-10fed47.patch b/patches/patch-background_blur-20260811-10fed47.patch
new file mode 100644
index 0000000..642dfd1
--- /dev/null
+++ b/patches/patch-background_blur-20260811-10fed47.patch
@@ -0,0 +1,40 @@
+diff --git a/Sources/bar/Config.swift b/Sources/bar/Config.swift
+index c2299fc..425ac32 100644
+--- a/Sources/bar/Config.swift
++++ b/Sources/bar/Config.swift
+@@ -42,6 +42,9 @@ enum Config {
+ 	/// The color used for the bar background.
+ 	static let background: Color = .hex("#000000").opacity(0.75)
+ 
++	/// The blur amount used for the bar background.
++	static let backgroundBlur: Double = 10
++
+ 	/// The colors used to highlight a cell at different levels (see ``Cell``).
+ 	static let highlights: [Color] = [.blue, .purple]
+ 
+diff --git a/Sources/bar/Views/AppDelegate.swift b/Sources/bar/Views/AppDelegate.swift
+index cefdfc0..a9bdcb1 100644
+--- a/Sources/bar/Views/AppDelegate.swift
++++ b/Sources/bar/Views/AppDelegate.swift
+@@ -11,7 +11,20 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
+ 		for screen in NSScreen.screens {
+ 			let frame = Screen.barFrame(screen, position: Config.position, height: Config.height)
+ 			let window = BarWindow(contentRect: frame)
+-			window.contentView = NSHostingView(rootView: BarView(blocks: blocks))
++
++			// Create the background blur view
++			let backgroundBlurView = BackgroundBlurView()
++			backgroundBlurView.autoresizingMask = [.width, .height]
++			backgroundBlurView.frame = window.contentView?.bounds ?? .zero
++
++			// Create the bar view as a child of the background blur view
++			let barView = NSHostingView(rootView: BarView(blocks: blocks))
++			barView.autoresizingMask = [.width, .height]
++			barView.frame = window.contentView?.bounds ?? .zero
++			backgroundBlurView.addSubview(barView)
++
++			// Present the window with the background blur view as content view
++			window.contentView = backgroundBlurView
+ 			window.orderFrontRegardless()
+ 			windows.append(window)
+ 		}
-- 
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