expose image types, fix impls contracts, one test

bingus/src/img.rs

@@ -1 +1,3 @@
-pub mod image;
+mod image;
+pub use image::ImageBuffer as Image;
+pub use image::*;

bingus/src/img/image.rs

@@ -1,13 +1,13 @@
 use std::ops::{BitOr, Deref, Shl};
 
-use image::{ImageBuffer, Pixel};
+pub use image::*;
 use num::{traits::ToBytes, Zero};
 
 use crate::{Bendable, IntoDataBytes, TryFromDataBytes};
 
 impl<P: Pixel> IntoDataBytes for ImageBuffer<P, Vec<P::Subpixel>>
 where
-    Vec<P>: Deref<Target = [P::Subpixel]>,
+    Vec<P::Subpixel>: Deref<Target = [P::Subpixel]>,
     P::Subpixel: ToBytes,
 {
     fn into_bytes(self) -> crate::Bytes {
@@ -24,7 +24,7 @@ pub struct Dimensions {
 
 impl<P: Pixel> TryFromDataBytes for ImageBuffer<P, Vec<P::Subpixel>>
 where
-    Vec<P>: Deref<Target = [P::Subpixel]>,
+    Vec<P::Subpixel>: Deref<Target = [P::Subpixel]>,
     P::Subpixel:
         ToBytes + Zero + Shl<u8, Output = P::Subpixel> + BitOr<P::Subpixel, Output = P::Subpixel>,
 {
@@ -54,7 +54,7 @@ where
 
 impl<P: Pixel> Bendable for ImageBuffer<P, Vec<P::Subpixel>>
 where
-    Vec<P>: Deref<Target = [P::Subpixel]>,
+    Vec<P::Subpixel>: Deref<Target = [P::Subpixel]>,
     P::Subpixel:
         ToBytes + Zero + Shl<u8, Output = P::Subpixel> + BitOr<P::Subpixel, Output = P::Subpixel>,
 {
@@ -64,3 +64,27 @@ where
         self
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[cfg(test)]
+    mod ser_de {
+        use super::super::{Dimensions, IntoDataBytes, TryFromDataBytes};
+        use image::RgbImage;
+
+        #[test]
+        fn empty() {
+            let image = RgbImage::new(0, 0);
+            assert_eq!(
+                Ok(image.clone()),
+                RgbImage::try_from_bytes(
+                    image.into_bytes(),
+                    Dimensions {
+                        width: 0,
+                        height: 0
+                    }
+                )
+            )
+        }
+    }
+}