feat: 支持 MQTT 上报灯条颜色数据

src-tauri/src/picker/screen.rs

@@ -0,0 +1,43 @@
+
+use scrap::Capturer;
+
+pub struct Screen {
+    capturer: Option<Capturer>,
+    init_error: Option<anyhow::Error>,
+    pub width: usize,
+    pub height: usize,
+}
+
+impl Screen {
+    pub fn new(capturer: Capturer, width: usize, height: usize) -> Self {
+        Self {
+            capturer: Some(capturer),
+            init_error: None,
+            width,
+            height,
+        }
+    }
+
+    pub fn new_failed(init_error: anyhow::Error, width: usize, height: usize) -> Self {
+        Self {
+            capturer: None,
+            init_error: Some(init_error),
+            width,
+            height,
+        }
+    }
+
+    pub fn take(&mut self) -> anyhow::Result<Vec<u8>> {
+        match self.capturer.as_mut() {
+            Some(capturer) => {
+                let buffer = capturer
+                    .frame()
+                    .map_err(|error| anyhow::anyhow!("failed to frame of display. {}", error))?;
+                anyhow::Ok(buffer.to_vec())
+            }
+            None => anyhow::bail!("Do not initialized"),
+        }
+    }
+}
+
+unsafe impl Send for Screen {}