Add clone derives

src/buffer_par.rs

@@ -8,6 +8,7 @@ use crate::traits::Pixel;
 use crate::ImageBuffer;
 
 /// Parallel iterator over pixel refs.
+#[derive(Clone)]
 pub struct PixelsPar<'a, P>
 where
     P: Pixel + Sync + 'a,
@@ -59,18 +60,6 @@ where
     }
 }
 
-impl<P> Clone for PixelsPar<'_, P>
-where
-    P: Pixel + Sync,
-    P::Subpixel: Sync,
-{
-    fn clone(&self) -> Self {
-        PixelsPar {
-            chunks: self.chunks.clone(),
-        }
-    }
-}
-
 impl<P> fmt::Debug for PixelsPar<'_, P>
 where
     P: Pixel + Sync,
@@ -148,6 +137,7 @@ where
 }
 
 /// Parallel iterator over pixel refs and their coordinates.
+#[derive(Clone)]
 pub struct EnumeratePixelsPar<'a, P>
 where
     P: Pixel + Sync + 'a,
@@ -221,19 +211,6 @@ where
     }
 }
 
-impl<P> Clone for EnumeratePixelsPar<'_, P>
-where
-    P: Pixel + Sync,
-    P::Subpixel: Sync,
-{
-    fn clone(&self) -> Self {
-        EnumeratePixelsPar {
-            pixels: self.pixels.clone(),
-            width: self.width,
-        }
-    }
-}
-
 impl<P> fmt::Debug for EnumeratePixelsPar<'_, P>
 where
     P: Pixel + Sync,