From 1630d00ec09211e0791e8053071a63638af875cc Mon Sep 17 00:00:00 2001
From: Dunestorm <filippo333@gmail.com>
Date: Wed, 1 Jan 2025 01:29:40 +0000
Subject: [PATCH] HDR-Helper v1.1.0.0 WIP

-Implemented experimental HDR brightness control.
---
 README.md  |  8 +++++---
 hdr-helper | 28 ++++++++++++++++++++++++----
 2 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 41b8b93..004f283 100644
--- a/README.md
+++ b/README.md
@@ -47,9 +47,11 @@ chmod +x ~/.local/usr/bin/hdr-helper
 You will then need to create the following file `~/.config/hdr-helper/monitor.conf`. Copy the below template and adjust to your PC's
 configuration:
 ```bash
-MONITOR=    # <DP-1 | Enter your monitor ID from xrandr>
-NATIVE_RES= # <3440x1440@165 | Enter your native monitor resolution followed by the refresh rate>
-TEMP_RES=   # <2560x1440@144 | Enter a different resolution or refresh rate from your native>
+MONITOR=                    # DP-1 | Enter your monitor ID from xrandr.
+NATIVE_RES=                 # 3440x1440@165 | Enter your native monitor resolution followed by the refresh rate.
+TEMP_RES=                   # 2560x1440@144 | Enter a different resolution or refresh rate from your native.
+HDR_TARGET_BRIGHTNESS=0     # 100 | Enter a target brightness level for your display in HDR mode [0,10-100].
+                            # 0 | Default
 ```
 `xrandr` will give you the following output; in the below example `DP-3` is the value we need to use to target
 the active monitor.
diff --git a/hdr-helper b/hdr-helper
index 7265f4b..d0f9fcb 100755
--- a/hdr-helper
+++ b/hdr-helper
@@ -1,10 +1,9 @@
 #!/bin/bash
 
 _VERSION=1.1.0.0
-CONFIG_FILE="$HOME/.config/hdr-helper/monitor.conf"
-MONITOR=     # MODIFY THESE VALUES INSIDE MONITOR.CONF #
-NATIVE_RES=  ###########################################
-TEMP_RES=    ###########################################
+CONFIG_PATH="$HOME/.config/hdr-helper/"
+CONFIG_FILE="$CONFIG_PATH/monitor.conf"
+CONFIG_CURR_BRIGHTNESS="$CONFIG_PATH/current-brightness-level"
 
 show_hdr_status() {
   ICON="/usr/share/icons/breeze-dark/devices/64/monitor.svg"
@@ -16,6 +15,25 @@ show_hdr_status() {
   fi
 }
 
+set_brightness() {
+  if [ "$HDR_TARGET_BRIGHTNESS" -gt 0 ]; then
+    kscreen-doctor -o | \
+      grep Brightness | \
+      head -n 1 | \
+      sed 's/.*set to \([0-9]\+\)%.*/\1/' \
+          > $CONFIG_CURR_BRIGHTNESS
+    echo "DEBUG: TARGET BRIGHTNESS" $HDR_TARGET_BRIGHTNESS
+    kscreen-doctor output.$MONITOR.brightness.$HDR_TARGET_BRIGHTNESS
+  fi
+}
+
+restore_brightness() {
+  if [ -f $CONFIG_CURR_BRIGHTNESS ]; then
+    echo "Debug: CURRENT BRIGHTNESS" $(cat $CONFIG_CURR_BRIGHTNESS)
+    kscreen-doctor output.$MONITOR.brightness.$(cat $CONFIG_CURR_BRIGHTNESS)
+  fi
+}
+
 refresh_display() {
   kscreen-doctor output.$MONITOR.mode.$TEMP_RES
   kscreen-doctor output.$MONITOR.mode.$NATIVE_RES
@@ -25,11 +43,13 @@ refresh_display() {
 enable_hdr () {
   kscreen-doctor output.$MONITOR.hdr.enable
   refresh_display
+  set_brightness
 }
 
 disable_hdr() {
   kscreen-doctor output.$MONITOR.hdr.disable
   refresh_display
+  restore_brightness
 }
 
 auto_hdr() {