Create Image types

src/image.rs

@@ -0,0 +1,47 @@
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Pixel {
+    pub r: f32,
+    pub g: f32,
+    pub b: f32,
+    pub a: f32,
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct Extent {
+    pub x: u32,
+    pub y: u32,
+}
+
+#[derive(Debug)]
+pub struct Image {
+    pub extent: Extent,
+    pub pixels: Vec<Pixel>,
+}
+
+#[derive(Debug)]
+pub enum Error {
+    Invalid,
+    Io(std::io::Error),
+}
+
+pub trait Format {
+    fn read<I>(input: &mut I) -> Result<Image, Error>
+    where
+        I: std::io::Read;
+
+    fn write<O>(output: &mut O, img: &Image) -> std::io::Result<()>
+    where
+        O: std::io::Write;
+}
+
+impl Extent {
+	pub fn size(&self) -> u32 {
+		self.x * self.y
+	}
+}
+
+impl From<std::io::Error> for Error {
+    fn from(error: std::io::Error) -> Self {
+        Error::Io(error)
+    }
+}

src/lib.rs

@@ -1,14 +1 @@
-pub fn add(left: u64, right: u64) -> u64 {
+pub mod image;
-    left + right
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}