From 960b808457892fb9ebdc1322b04670e2af7cb14b Mon Sep 17 00:00:00 2001
From: Boris Yumankulov <boria138@altlinux.org>
Date: Wed, 9 Jul 2025 21:25:14 +0500
Subject: [PATCH] feat: added compatibility with ChimeraOS configuration and
 device-quirks

Signed-off-by: Boris Yumankulov <boria138@altlinux.org>
---
 README.md                    | 37 +++++++++++++++++++++-
 usr/bin/portproton-gamescope | 60 ++++++++++++++++++++++++++++++++++--
 2 files changed, 94 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 16547c1..914fa32 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,48 @@
 # PortProtonQt session
 
 This project is not affiliated with Valve (wide inspiration was taken from
-their work on the SteamDeck). This configuration depends on [gamescope-session](https://raw.githubusercontent.com/ChimeraOS/gamescope-session) from the ChimeraOS project. and [portprotonqt](https://git.linux-gaming.ru/Boria138/PortProtonQt)
+their work on the SteamDeck)
 
 ## Basic manual setup
 
 Copy this repository file structure into the appropriate places and you'll be
 able to start the session on any Display Manager of your choice.
 
+# User Configuration
+
+The session sources environment from `~/.config/environment.d/*.conf` files.
+The easiest way to configure the session is to create `~/.config/environment.d/gamescope-session-plus.conf`
+and set variables there:
+
+```bash
+# Size of the screen. If not set gamescope will detect native resolution from drm.
+SCREEN_HEIGHT=2160
+SCREEN_WIDTH=3840
+
+# Internal render size of the screen. If not set, will be the same as SCREEN_HEIGHT and SCREEN_WIDTH.
+INTERNAL_WIDTH=1280
+INTERNAL_HEIGHT=800
+
+# Orientation adjustment of panel, possible values: left, right
+ORIENTATION=left
+
+# Enable VRR
+ADAPTIVE_SYNC=1
+
+# Treat the internal panel as an external monitor
+PANEL_TYPE=external
+
+# Set priority of display connectors
+OUTPUT_CONNECTOR='*,DSI-1'
+
+# Set the specific values allowed for refresh rates
+CUSTOM_REFRESH_RATES=40,50,60
+
+# DRM mode generation algorithm (cvt, fixed)
+# TODO: what is this ?
+DRM_MODE=fixed
+```
+
 # License & Contributing
 
 The project is licensed under GPL v3 license. If you want to contribute,
diff --git a/usr/bin/portproton-gamescope b/usr/bin/portproton-gamescope
index c015193..7582efd 100755
--- a/usr/bin/portproton-gamescope
+++ b/usr/bin/portproton-gamescope
@@ -1,5 +1,18 @@
 #!/usr/bin/env bash
 
+gamescope_has_option() {
+	if (gamescope --help 2>&1 | grep -e "$1" > /dev/null); then
+		return 0
+	fi
+
+	return 1
+}
+
+# Source device quirks if exists
+if [ -f /usr/share/gamescope-session-plus/device-quirks ]; then
+	. /usr/share/gamescope-session-plus/device-quirks
+fi
+
 # Source user configuration from ~/.config/environment.d
 set -a
 for i in "${HOME}"/.config/environment.d/*.conf; do
@@ -8,12 +21,55 @@ done
 set +a
 
 # Gamescope parameters
-GAMESCOPE_PARAMS=""
+: "${OUTPUT_CONNECTOR:=*,eDP-1}"
+GAMESCOPE_PARAMS="--prefer-output $OUTPUT_CONNECTOR"
 
 # Check if NVK driver is in use
 if vulkaninfo 2>/dev/null | grep -i "driverName" | grep -q "NVK"; then
 	# Workaround for https://gitlab.freedesktop.org/mesa/mesa/-/issues/13478
-	GAMESCOPE_PARAMS+=" --backend sdl -f"
+	BACKEND="sdl"
+	GAMESCOPE_PARAMS+=" -f"
+fi
+
+if [ -n "$SCREEN_WIDTH" ] && [ -n "$SCREEN_HEIGHT" ]; then
+	GAMESCOPE_PARAMS+=" -W $SCREEN_WIDTH -H $SCREEN_HEIGHT"
+fi
+
+if [ -n "$INTERNAL_WIDTH" ] && [ -n "$INTERNAL_HEIGHT" ] ; then
+	GAMESCOPE_PARAMS+=" -w $INTERNAL_WIDTH -h $INTERNAL_HEIGHT"
+fi
+
+if [ -n "$DRM_MODE" ] ; then
+	GAMESCOPE_PARAMS+=" --generate-drm-mode $DRM_MODE"
+fi
+
+if [ -n "$ORIENTATION" ] ; then
+	GAMESCOPE_PARAMS+=" --force-orientation $ORIENTATION"
+fi
+
+if [ -n "$ADAPTIVE_SYNC" ]; then
+	GAMESCOPE_PARAMS+=" --adaptive-sync"
+fi
+
+if [ -n "$PANEL_TYPE" ] && gamescope_has_option "--force-panel-type"; then
+	GAMESCOPE_PARAMS+=" --force-panel-type $PANEL_TYPE"
+fi
+
+if [ -n "$CUSTOM_REFRESH_RATES" ] && gamescope_has_option "--custom-refresh-rates"; then
+	GAMESCOPE_PARAMS+=" --custom-refresh-rates $CUSTOM_REFRESH_RATES"
+fi
+
+if [ -n "$USE_ROTATION_SHADER" ] && gamescope_has_option "--use-rotation-shader"; then
+	GAMESCOPE_PARAMS+=" --use-rotation-shader $USE_ROTATION_SHADER"
+fi
+
+if [ -n "$BACKEND" ] && gamescope_has_option "--backend"; then
+	GAMESCOPE_PARAMS+=" --backend $BACKEND"
+fi
+
+if [ -f "$CURSOR_FILE" ]; then
+	# Use specified cursor if file exists
+	GAMESCOPE_PARAMS+=" --cursor ${CURSOR_FILE}"
 fi
 
 # Prefer a specific Vulkan adapter if defined