⚰️ Added a simple raw image format.

Author: rizerco

src/image.rs

@@ -19,6 +19,7 @@ mod constraints;
 pub mod cv;
 mod mask_operations;
 mod orientation;
+pub mod raw;
 pub mod transformation;
 mod zlib;
 

src/image/raw.rs

@@ -0,0 +1,55 @@
+use file_stream::{read::FileStreamReader, write::FileStreamWriter};
+
+use crate::Size;
+
+use super::Image;
+
+impl Image {
+    /// Creates an image from raw data.
+    pub fn from_raw_data(data: Vec<u8>) -> anyhow::Result<Image> {
+        let mut file_stream = FileStreamReader::from_data(data)?;
+        // Skipping the format for now.
+        file_stream.skip_bytes(1)?;
+        let width = file_stream.read_be()?;
+        let height = file_stream.read_be()?;
+        let size = Size { width, height };
+        let bytes_per_row = file_stream.read_be()?;
+
+        let data = file_stream.read_remaining_data()?;
+        let image = Image {
+            data,
+            size,
+            bytes_per_row,
+        };
+        Ok(image)
+    }
+
+    /// Returns the image data in a simple raw format.
+    pub fn raw_data(&self) -> anyhow::Result<Vec<u8>> {
+        let mut file_stream = FileStreamWriter::new();
+        // Write a placeholder for the image format.
+        file_stream.write_be(&0u8)?;
+        file_stream.write_be(&self.size.width)?;
+        file_stream.write_be(&self.size.height)?;
+        file_stream.write_be(&self.bytes_per_row)?;
+        file_stream.write_bytes(&self.data)?;
+
+        Ok(file_stream.data().to_vec())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::Image;
+
+    #[test]
+    fn raw_data() {
+        let image = Image::open("tests/images/mountain.png").unwrap();
+
+        let encoded = image.raw_data().unwrap();
+
+        let decoded = Image::from_raw_data(encoded).unwrap();
+
+        assert!(image.appears_equal_to(&decoded));
+    }
+}