feat: 支持读取显示器配置。

src-tauri/src/display/display_handler.rs

@@ -0,0 +1,67 @@
+use std::{sync::Arc, time::SystemTime};
+
+use ddc_hi::{Ddc, Display};
+use tokio::sync::RwLock;
+
+use super::DisplayState;
+
+pub struct DisplayHandler {
+    pub state: Arc<RwLock<DisplayState>>,
+    pub controller: Arc<RwLock<Display>>,
+}
+
+impl DisplayHandler {
+    pub async fn fetch_state(&self) {
+        let mut controller = self.controller.write().await;
+
+        let mut temp_state = DisplayState::default();
+
+        match controller.handle.get_vcp_feature(0x10) {
+            Ok(value) => {
+                temp_state.max_brightness = value.maximum();
+                temp_state.min_brightness = 0;
+                temp_state.brightness = value.value();
+            }
+            Err(_) => {}
+        };
+        match controller.handle.get_vcp_feature(0x12) {
+            Ok(value) => {
+                temp_state.max_contrast = value.maximum();
+                temp_state.min_contrast = 0;
+                temp_state.contrast = value.value();
+            }
+            Err(_) => {}
+        };
+        match controller.handle.get_vcp_feature(0xdc) {
+            Ok(value) => {
+                temp_state.max_mode = value.maximum();
+                temp_state.min_mode = 0;
+                temp_state.mode = value.value();
+            }
+            Err(_) => {}
+        };
+
+        temp_state.last_fetched_at = SystemTime::now();
+
+        let mut state = self.state.write().await;
+        *state = temp_state;
+    }
+
+    pub async fn set_brightness(&self, brightness: u16) {
+        let mut state = self.state.write().await;
+        state.brightness = brightness;
+        state.last_modified_at = SystemTime::now();
+    }
+
+    pub async fn set_contrast(&self, contrast: u16) {
+        let mut state = self.state.write().await;
+        state.contrast = contrast;
+        state.last_modified_at = SystemTime::now();
+    }
+
+    pub async fn set_mode(&self, mode: u16) {
+        let mut state = self.state.write().await;
+        state.mode = mode;
+        state.last_modified_at = SystemTime::now();
+    }
+}