From 07e232129084bd84a5de70592d0a9cf08bc8cbc3 Mon Sep 17 00:00:00 2001
From: Ben Grande <ben.grande.b@gmail.com>
Date: Mon, 27 Jan 2025 18:32:18 +0100
Subject: [PATCH] feat: add monitor resize helper

---
 salt/dom0/files/bin/qubes-gui-resolution | 25 ++++++++++++++++++++++++
 salt/dom0/helpers.sls                    | 11 ++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100755 salt/dom0/files/bin/qubes-gui-resolution

diff --git a/salt/dom0/files/bin/qubes-gui-resolution b/salt/dom0/files/bin/qubes-gui-resolution
new file mode 100755
index 0000000..dceb53b
--- /dev/null
+++ b/salt/dom0/files/bin/qubes-gui-resolution
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# SPDX-FileCopyrightText: 2025 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# https://www.qubes-os.org/doc/gui-configuration/#video-ram-adjustment-for-high-resolution-displays
+
+set -eu
+
+if ! command -v xrandr >/dev/null; then
+  print '%s\n' "missing program: xrandr" >&2
+  exit 1
+fi
+
+gui_mem="$(xrandr --listactivemonitors |
+  awk -F'[ /x]' '/^\s+[0-9]+/{if($4>max) max=$4; sum+=$6}
+  END {print max*sum*4/1024}')"
+
+if test "${gui_mem}" = "0"; then
+  exit
+fi
+
+qvm-features dom0 gui-videoram-min "${gui_mem}"
+qvm-features dom0 gui-videoram-overhead 0
diff --git a/salt/dom0/helpers.sls b/salt/dom0/helpers.sls
index 1a6de1f..80da59a 100644
--- a/salt/dom0/helpers.sls
+++ b/salt/dom0/helpers.sls
@@ -1,5 +1,5 @@
 {#
-SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+SPDX-FileCopyrightText: 2024 - 2025 Benjamin Grande M. S. <ben.grande.b@gmail.com>
 
 SPDX-License-Identifier: AGPL-3.0-or-later
 #}
@@ -44,4 +44,13 @@ SPDX-License-Identifier: AGPL-3.0-or-later
     - group: root
     - makedirs: True
 
+"{{ slsdotpath }}-qubes-gui-resolution-helper":
+  file.managed:
+    - name: /usr/local/bin/qubes-gui-resolution
+    - source: salt://{{ slsdotpath }}/files/bin/qubes-gui-resolution
+    - mode: "0755"
+    - user: root
+    - group: root
+    - makedirs: True
+
 {% endif -%}