From fd47159bd3ec220c63b497ad659507ce5c54ca54 Mon Sep 17 00:00:00 2001
From: Akshay <nerdy@peppe.rs>
Date: Fri, 26 Feb 2021 11:09:31 +0530
Subject: add basic types

---
 src/lib.rs | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 31e1bb2..1471aa8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,102 @@
+#![allow(unreachable_patterns)]
+#![allow(non_snake_case)]
+#[non_exhaustive]
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub enum Pixel {
+    On,
+    Off,
+}
+
+#[non_exhaustive]
+#[derive(Copy, Clone, Debug, PartialEq)]
+pub enum OBIVersion {
+    One,
+}
+
+impl OBIVersion {
+    pub fn header_size(&self) -> u32 {
+        match self {
+            One => 26,
+        }
+    }
+}
+
+#[non_exhaustive]
+pub struct FileHeader {
+    pub version: u16,
+    pub file_size: u32,
+    pub data_offset: u32,
+}
+
+impl FileHeader {
+    pub fn new(version: OBIVersion, data_size: u32) -> Self {
+        let header_size = version.header_size();
+        Self {
+            version: match version {
+                OBIVersion::One => 1u16,
+                _ => unreachable!("New version has been added!"),
+            },
+            file_size: header_size + data_size,
+            data_offset: header_size,
+        }
+    }
+}
+
+#[non_exhaustive]
+pub struct ImageInfoHeader {
+    pub width: u32,
+    pub height: u32,
+    pub compression_type: u32,
+    pub post_compression_size: u32,
+}
+
+impl ImageInfoHeader {
+    pub fn new(width: u32, height: u32) -> Self {
+        Self {
+            width,
+            height,
+            compression_type: 0u32,
+            post_compression_size: 0u32,
+        }
+    }
+}
+
+#[non_exhaustive]
+pub enum CompressionType {
+    RLE,
+    Kosinki,
+    None,
+}
+
+impl CompressionType {
+    pub fn from_u32(kind: u32) -> Self {
+        match kind {
+            0 => CompressionType::None,
+            1 => CompressionType::RLE,
+            10 => CompressionType::Kosinki,
+            _ => panic!("Invalid compression algorithm"),
+        }
+    }
+}
+
+pub struct Image {
+    pub file_header: FileHeader,
+    pub image_info_header: ImageInfoHeader,
+    pub data: Vec<Pixel>,
+}
+
+impl Image {
+    pub fn new(width: u32, height: u32) -> Self {
+        let data_size = width * height;
+        let data = vec![Pixel::Off; data_size as usize];
+        Self {
+            file_header: FileHeader::new(OBIVersion::One, data_size),
+            image_info_header: ImageInfoHeader::new(width, height),
+            data,
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     #[test]
-- 
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