Initial commit

contestops/set-display-scale.py

@@ -0,0 +1,37 @@
+#!/usr/bin/python3
+
+# This script sets the display scale factor to 2, for use on 4K displays where everything is too small without scaling.
+
+import dbus
+
+new_scale = 2.0
+
+# https://gitlab.gnome.org/GNOME/mutter/-/blob/main/data/dbus-interfaces/org.gnome.Mutter.DisplayConfig.xml
+bus_name = "org.gnome.Mutter.DisplayConfig"
+object_path = "/org/gnome/Mutter/DisplayConfig"
+
+session_bus = dbus.SessionBus()
+display_config_object = session_bus.get_object(bus_name, object_path)
+display_config_intf = dbus.Interface(display_config_object, dbus_interface=bus_name)
+
+serial, physical_monitors, logical_monitors, properties = display_config_intf.GetCurrentState()
+
+current_mode_id = {}
+for ((connector, _, _, _), modes, monitor_properties) in physical_monitors:
+    for (mode_id, width, height, rate, preferred_scale, supported_scales, mode_properties) in modes:
+        if mode_properties.get("is-current", False):
+            current_mode_id[connector] = mode_id
+
+scaled_logical_monitors = [
+    (layout_x, layout_y, new_scale, transform, primary, [
+        (connector, current_mode_id[connector], {}) for (connector, _, _, _) in monitors
+    ])
+    for (layout_x, layout_y, scale, transform, primary, monitors, monitor_properties) in logical_monitors
+]
+
+apply_properties = {}
+if "layout-mode" in properties and properties.get("supports-changing-layout-mode", False):
+    apply_properties["layout-mode"] = properties["layout-mode"]
+
+method = 1 # temporary
+display_config_intf.ApplyMonitorsConfig(serial, method, scaled_logical_monitors, apply_properties)