chore: add image bytes capture

src/macos/capture.rs

@@ -35,3 +35,15 @@ pub fn capture(
     RgbaImage::from_raw(width as u32, height as u32, buffer)
         .ok_or_else(|| XCapError::new("RgbaImage::from_raw failed"))
 }
+
+pub fn capture_bytes(
+    cg_rect: CGRect,
+    list_option: CGWindowListOption,
+    window_id: CGWindowID,
+) -> XCapResult<Vec<u8>> {
+    let cg_image = create_image(cg_rect, list_option, window_id, kCGWindowImageDefault)
+        .ok_or_else(|| XCapError::new(format!("Capture failed {} {:?}", window_id, cg_rect)))?;
+
+    let bytes = Vec::from(cg_image.data().bytes());
+    Ok(bytes)
+}

src/macos/impl_monitor.rs

@@ -6,7 +6,7 @@ use image::RgbaImage;
 
 use crate::error::{XCapError, XCapResult};
 
-use super::capture::capture;
+use super::capture::{capture, capture_bytes};
 
 #[derive(Debug, Clone)]
 pub(crate) struct ImplMonitor {
@@ -132,4 +132,12 @@ impl ImplMonitor {
             kCGNullWindowID,
         )
     }
+
+    pub fn capture_bytes(&self) -> XCapResult<Vec<u8>> {
+        capture_bytes(
+            self.cg_display.bounds(),
+            kCGWindowListOptionAll,
+            kCGNullWindowID,
+        )
+    }
 }

src/monitor.rs

@@ -78,4 +78,8 @@ impl Monitor {
     pub fn capture_image(&self) -> XCapResult<RgbaImage> {
         self.impl_monitor.capture_image()
     }
+
+    pub fn capture_bytes(&self) -> XCapResult<Vec<u8>> {
+        self.impl_monitor.capture_bytes()
+    }
 }