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#![allow(unreachable_patterns)]
#![allow(non_snake_case)]
#![allow(dead_code)]
use std::io;
mod decode;
mod encode;
pub mod error;
mod rle;
use error::{OBIError, OBIResult};
#[non_exhaustive]
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum OBIVersion {
One,
}
impl OBIVersion {
pub fn header_size(&self) -> u32 {
match self {
OBIVersion::One => 26,
}
}
}
#[non_exhaustive]
#[derive(Debug)]
pub struct FileHeader {
pub file_size: u32,
pub data_offset: u32,
pub version: u16,
}
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]
#[derive(Debug)]
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]
#[derive(Copy, Clone, Debug, PartialEq)]
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 fn to_u32(self) -> u32 {
match self {
CompressionType::None => 0,
CompressionType::RLE => 1,
CompressionType::Kosinki => 10,
_ => panic!("Invalid compression algorithm"),
}
}
}
#[derive(Debug)]
pub struct Image {
pub file_header: FileHeader,
pub image_info_header: ImageInfoHeader,
pub data: Vec<bool>,
}
impl Image {
pub fn new(width: u32, height: u32) -> Self {
Self::new_with(width, height, false)
}
pub fn new_with(width: u32, height: u32, default_val: bool) -> Self {
// round to the nearest multiple of 8
// convert to number of bytes by dividing by 8
let mut data_size = width * height + 7;
data_size = data_size - (data_size % 8);
let data = vec![default_val; data_size as usize];
Self {
file_header: FileHeader::new(OBIVersion::One, data_size / 8),
image_info_header: ImageInfoHeader::new(width, height),
data,
}
}
pub fn use_compression(&mut self, comp: CompressionType) {
self.image_info_header.compression_type = comp.to_u32();
}
pub fn width(&self) -> u32 {
self.image_info_header.width
}
pub fn height(&self) -> u32 {
self.image_info_header.height
}
#[doc(hidden)]
pub fn index(&self, x: u32, y: u32) -> OBIResult<usize> {
if x >= self.width() || y >= self.height() {
Err(OBIError::Image)
} else {
Ok((y * self.width() + x) as usize)
}
}
pub fn set(&mut self, x: u32, y: u32, val: bool) -> OBIResult<()> {
let index = self.index(x, y)?;
self.data[index] = val;
Ok(())
}
pub fn flip(&mut self, x: u32, y: u32) -> OBIResult<()> {
let index = self.index(x, y)?;
self.data[index] = !self.data[index];
Ok(())
}
pub fn get(&self, x: u32, y: u32) -> OBIResult<bool> {
let index = self.index(x, y)?;
Ok(self.data[index])
}
pub fn encode(&self) -> OBIResult<Vec<u8>> {
encode::encode_image(self)
}
pub fn decode(data: &mut io::Cursor<Vec<u8>>) -> OBIResult<Image> {
decode::decode_image(data)
}
}
|
