From b853d5b1247fddfaeac0dbdfb9304c69c6de463a Mon Sep 17 00:00:00 2001
From: Val Packett <val@packett.cool>
Date: Sat, 4 Jan 2025 01:05:08 -0300
Subject: dbus: DisplayConfig: report fractional scales as supported

---
 src/dbus/mutter_display_config.rs | 16 ++++++++++------
 src/utils/scale.rs                |  2 +-
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/dbus/mutter_display_config.rs b/src/dbus/mutter_display_config.rs
index c2d4502e..2be37b5e 100644
--- a/src/dbus/mutter_display_config.rs
+++ b/src/dbus/mutter_display_config.rs
@@ -2,6 +2,7 @@ use std::collections::HashMap;
 use std::sync::{Arc, Mutex};
 
 use serde::Serialize;
+use smithay::utils::Size;
 use zbus::fdo::RequestNameFlags;
 use zbus::object_server::SignalEmitter;
 use zbus::zvariant::{self, OwnedValue, Type};
@@ -10,6 +11,7 @@ use zbus::{fdo, interface};
 use super::Start;
 use crate::backend::IpcOutputMap;
 use crate::utils::is_laptop_panel;
+use crate::utils::scale::supported_scales;
 
 pub struct DisplayConfig {
     ipc_outputs: Arc<Mutex<IpcOutputMap>>,
@@ -84,15 +86,17 @@ impl DisplayConfig {
                         refresh_rate,
                         is_preferred,
                     } = *m;
-                    let refresh = refresh_rate as f64 / 1000.;
+                    let width = i32::from(width);
+                    let height = i32::from(height);
+                    let refresh_rate = refresh_rate as f64 / 1000.;
 
                     Mode {
-                        id: format!("{width}x{height}@{refresh:.3}"),
-                        width: i32::from(width),
-                        height: i32::from(height),
-                        refresh_rate: refresh,
+                        id: format!("{width}x{height}@{refresh_rate:.3}"),
+                        width,
+                        height,
+                        refresh_rate,
                         preferred_scale: 1.,
-                        supported_scales: vec![1., 2., 3.],
+                        supported_scales: supported_scales(Size::from((width, height))).collect(),
                         properties: HashMap::from([(
                             String::from("is-preferred"),
                             OwnedValue::from(is_preferred),
diff --git a/src/utils/scale.rs b/src/utils/scale.rs
index ff89b4cb..6736b464 100644
--- a/src/utils/scale.rs
+++ b/src/utils/scale.rs
@@ -38,7 +38,7 @@ pub fn guess_monitor_scale(size_mm: Size<i32, Raw>, resolution: Size<i32, Physic
         .map_or(1., |(scale, _)| scale)
 }
 
-fn supported_scales(resolution: Size<i32, Physical>) -> impl Iterator<Item = f64> {
+pub fn supported_scales(resolution: Size<i32, Physical>) -> impl Iterator<Item = f64> {
     (MIN_SCALE * STEPS..=MAX_SCALE * STEPS)
         .map(|x| f64::from(x) / f64::from(STEPS))
         .filter(move |scale| is_valid_for_resolution(resolution, *scale))
-- 
cgit