From 219d855945eed65e46387882bf5f745f2b45c317 Mon Sep 17 00:00:00 2001
From: "A.Levin" <abdullahlevin@gmail.com>
Date: Fri, 12 Dec 2025 14:29:57 +0300
Subject: [PATCH] Add grayscale toggle script
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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- Toggle grayscale mode on dual GPU (NVIDIA + Intel) Linux setup
- Organized with folder structure: each script has its own directory with README

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 README.md           |  9 ++++++++-
 grayscale/README.md | 29 +++++++++++++++++++++++++++++
 grayscale/grayscale | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 grayscale/README.md
 create mode 100755 grayscale/grayscale

diff --git a/README.md b/README.md
index ff0287e..78995a0 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,9 @@
 # scripts
-my scripts with descritpion
+
+Personal shell scripts collection.
+
+## Scripts
+
+| Script | Description |
+|--------|-------------|
+| [grayscale](grayscale/README.md) | Toggle grayscale mode on dual GPU (NVIDIA + Intel) Linux |
diff --git a/grayscale/README.md b/grayscale/README.md
new file mode 100644
index 0000000..ab4e5c5
--- /dev/null
+++ b/grayscale/README.md
@@ -0,0 +1,29 @@
+# grayscale
+
+Toggle grayscale mode on Linux with NVIDIA + Intel hybrid graphics.
+
+## Usage
+
+```bash
+grayscale        # toggle
+grayscale on     # enable grayscale
+grayscale off    # disable grayscale
+```
+
+## How it works
+
+- **NVIDIA**: Uses `nvidia-settings -a DigitalVibrance=-1024`
+- **Intel**: Uses xrandr CTM (Color Transformation Matrix)
+
+## Requirements
+
+- NVIDIA GPU with `nvidia-settings`
+- Intel GPU with xrandr CTM support
+- X11
+
+## Installation
+
+```bash
+cp grayscale ~/bin/
+chmod +x ~/bin/grayscale
+```
diff --git a/grayscale/grayscale b/grayscale/grayscale
new file mode 100755
index 0000000..4fa7d5a
--- /dev/null
+++ b/grayscale/grayscale
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+STATE_FILE="$HOME/.grayscale_state"
+
+set_grayscale() {
+    nvidia-settings -a DigitalVibrance=-1024 >/dev/null 2>&1
+    xrandr --output eDP-1-1 --set CTM "0.299,0.587,0.114,0.299,0.587,0.114,0.299,0.587,0.114" 2>/dev/null
+    echo "on" > "$STATE_FILE"
+    echo "Grayscale: ON"
+}
+
+set_normal() {
+    nvidia-settings -a DigitalVibrance=0 >/dev/null 2>&1
+    xrandr --output eDP-1-1 --set CTM "1,0,0,0,1,0,0,0,1" 2>/dev/null
+    echo "off" > "$STATE_FILE"
+    echo "Grayscale: OFF"
+}
+
+toggle() {
+    if [[ -f "$STATE_FILE" ]] && [[ "$(cat "$STATE_FILE")" == "on" ]]; then
+        set_normal
+    else
+        set_grayscale
+    fi
+}
+
+case "${1:-toggle}" in
+    on)     set_grayscale ;;
+    off)    set_normal ;;
+    toggle) toggle ;;
+    *)
+        echo "Usage: grayscale [on|off|toggle]"
+        exit 1
+        ;;
+esac