feat: add ddcutil gamma backend

Cargo.lock

@@ -244,7 +244,7 @@ checksum = "fbf6a919d6cf397374f7dfeeea91d974c7c0a7221d0d0f4f20d859d329e53fcc"
 
 [[package]]
 name = "hinoirisetr"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "libloading",
  "smol",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hinoirisetr"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Vladimir Rubin <vavakado@proton.me>"]
 description = "A daemon to dim the screen at night"
 license = "MIT"

flake.nix

@@ -42,7 +42,7 @@
 
         packages.default = pkgs.rustPlatform.buildRustPackage {
           pname = "hinoirisetr";
-          version = "0.2.0";
+          version = "0.3.0";
 
           src = ./.;
 

src/lib.rs

@@ -26,6 +26,13 @@ pub struct Config {
     pub sunrise_end: u8,
 
     pub notification_timeout: u32,
+    pub gamma_backend: GammaBackend,
+}
+
+#[derive(Debug, Copy, Clone)]
+pub enum GammaBackend {
+    Hyprctl,
+    Ddcutil,
 }
 
 impl Default for Config {
@@ -40,6 +47,7 @@ impl Default for Config {
             sunrise_start: 4,
             sunrise_end: 7,
             notification_timeout: 5000,
+            gamma_backend: GammaBackend::Hyprctl,
         }
     }
 }
@@ -51,6 +59,7 @@ pub enum ConfigError {
     InvalidTemperature(String),
     InvalidTime(String),
     InvalidGamma(String),
+    InvalidGammaBackend(String),
 }
 
 impl From<std::io::Error> for ConfigError {
@@ -92,11 +101,17 @@ impl Config {
 
                 let value = value.trim().replace('"', "");
                 match current_section.as_str() {
-                    "" => {
-                        if key_trimmed == "notification_timeout" {
+                    "" => match key_trimmed {
+                        "notification_timeout" => {
                             config.notification_timeout = value.parse::<u32>()?;
                         }
-                    }
+                        "gamma_backend" => match value.to_lowercase().as_str() {
+                            "hyprctl" => config.gamma_backend = GammaBackend::Hyprctl,
+                            "ddcutil" => config.gamma_backend = GammaBackend::Ddcutil,
+                            _ => return Err(ConfigError::InvalidGammaBackend(value.to_string())),
+                        },
+                        _ => {}
+                    },
                     "gamma" => match key_trimmed {
                         "day" => {
                             let parsed = value.parse::<u16>()?;
@@ -229,7 +244,7 @@ pub fn compute_settings(now: Time, config: &Config) -> (u16, u16) {
 }
 
 /// Apply given temperature (Kelvin) and gamma (%) via hyprctl commands
-pub fn apply_settings(temp: u16, gamma: u16) {
+pub fn apply_settings(temp: u16, gamma: u16, backend: GammaBackend) {
     trace!("apply_settings({temp}, {gamma})");
     debug!("applying temperature: {temp}");
     debug!("applying gamma: {gamma}");
@@ -239,8 +254,18 @@ pub fn apply_settings(temp: u16, gamma: u16) {
         .output();
     trace!("hyprctl hyprsunset temperature {temp}");
 
-    let _ = Command::new("hyprctl")
-        .args(["hyprsunset", "gamma", &gamma.to_string()])
-        .output();
-    trace!("hyprctl hyprsunset gamma {gamma}");
+    match backend {
+        GammaBackend::Hyprctl => {
+            let _ = Command::new("hyprctl")
+                .args(["hyprsunset", "gamma", &gamma.to_string()])
+                .output();
+            trace!("hyprctl hyprsunset gamma {gamma}");
+        }
+        GammaBackend::Ddcutil => {
+            let _ = Command::new("ddcutil")
+                .args(["setvcp", "10", &gamma.to_string()])
+                .output();
+            trace!("ddcutil setvcp 10 {gamma}");
+        }
+    }
 }

src/main.rs

@@ -258,7 +258,7 @@ fn main() {
         {
             let now = get_time();
             let (temp, gamma) = compute_settings(now, &*config_guard().await);
-            apply_settings(temp, gamma);
+            apply_settings(temp, gamma, config_guard().await.gamma_backend);
             trace!("initial settings applied: {temp}K, {gamma}%");
         }
 
@@ -268,11 +268,12 @@ fn main() {
                 apply_settings(
                     config_guard().await.temp_day,
                     config_guard().await.gamma_day,
+                    config_guard().await.gamma_backend,
                 );
             } else {
                 let now = get_time();
                 let (temp, gamma) = compute_settings(now, &*config_guard().await);
-                apply_settings(temp, gamma);
+                apply_settings(temp, gamma, config_guard().await.gamma_backend);
             }
 
             let _ = notify_r.recv().await;