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|
// #![allow(dead_code)]
use crate::reader::FileReader;
use std::{fs::File, io::BufReader, ops::{self}};
mod reader;
// #[derive(Debug)]
// struct RGB<T: Add<Output = T> + Copy>
// {
// r: T,
// g: T,
// b: T
// }
trait ColorDepth: Clone
{
const DEFAULT: Self;
}
impl ColorDepth for u8 {
const DEFAULT: Self = 0;
}
impl ColorDepth for u16 {
const DEFAULT: Self = 0;
}
impl ColorDepth for u32 {
const DEFAULT: Self = 0;
}
#[derive(Debug, Clone)]
struct RGBA<T: ColorDepth>
{
r: T,
g: T,
b: T,
a: T
}
#[derive(Debug, Clone)]
struct RGB<T: ColorDepth>
{
r: T,
g: T,
b: T,
}
trait ColorType: Clone
{
const DEFAULT: Self;
}
impl<T: ColorDepth> ColorType for RGBA<T>
{
const DEFAULT: Self = Self { r: T::DEFAULT, g: T::DEFAULT, b: T::DEFAULT, a: T::DEFAULT };
}
impl<T: ColorDepth> ColorType for RGB<T>
{
const DEFAULT: Self = Self { r: T::DEFAULT, g: T::DEFAULT, b: T::DEFAULT};
}
#[derive(Debug)]
struct PixelArr<T: ColorType>
{
width: u32,
height: u32,
raw: Vec<T>
}
impl<T: ColorType> PixelArr<T> {
fn new(width: u32, height: u32) -> Self {
let raw = vec![T::DEFAULT;(width*height) as usize];
Self { width, height, raw }
}
}
impl<T: ColorType> ops::Index<(usize, usize)> for PixelArr<T>
{
type Output = T;
fn index(&self, index: (usize, usize)) -> &Self::Output {
let (x, y) = index;
&self.raw[x + y*(self.width as usize)]
}
}
impl<T: ColorType> ops::IndexMut<(usize, usize)> for PixelArr<T>
{
fn index_mut(&mut self, index: (usize, usize)) -> &mut T {
let (x, y) = index;
&mut self.raw[x + y*(self.width as usize)]
}
}
#[derive(Debug)]
struct ImageBase
{
width: u32,
height: u32,
bit_depth: u8,
pixels: PixelArr<RGB<u8>>
}
struct BMPImage
{
}
trait Image
{
fn read_image(reader: &mut FileReader) -> Result<ImageBase, &'static str>;
}
impl Image for BMPImage
{
fn read_image(reader: &mut FileReader) -> Result<ImageBase, &'static str>
{
let magic: [u8; 2] = reader.read_array();
if magic != [0x42, 0x4d]
{
return Err("Not a bitmap!");
}
let _file_size: u32 = reader.read();
reader.skip(4);
let _offset: u32 = reader.read();
let header_size: u32 = reader.read();
// println!("File header: {file_size} {offset} {header_size}");
if header_size == 40
{
let width: u32 = reader.read();
let height: u32 = reader.read();
let _color_planes: u16 = reader.read();
let bpp = reader.read::<2, u16>() as u8;
let compression_method: u32 = reader.read();
let _image_size: u32 = reader.read();
let _horr_res: u32 = reader.read();
let _vert_res: u32 = reader.read();
let _color_count: u32 = reader.read();
let _impotant_color_count: u32 = reader.read();
if
bpp != 24
|| compression_method != 0
{
return Err("bpp or compresssion method not supported")
}
let row_size = (((bpp as u32) * width + 31)/32) * 4;
let skip: usize = (row_size - width * 3) as usize;
let mut pixel_arr = PixelArr::new(width, height);
for y in (0..height).rev()
{
for x in 0..width
{
let mut pixel = RGB::DEFAULT;
pixel.b = reader.read();
pixel.g = reader.read();
pixel.r = reader.read();
pixel_arr[(x as usize, y as usize)] = pixel;
}
reader.skip(skip);
}
return Ok(ImageBase
{
width,
height,
bit_depth: bpp,
pixels: pixel_arr,
})
}
else
{
return Err("Header size not supported yet");
}
}
}
fn main() {
let file = File::open("smiley.bmp").expect("File does not exist");
let mut reader = FileReader::new(BufReader::new(file));
let _bmp = BMPImage::read_image(&mut reader).expect("Bitmap had error");
// println!("{bmp:?}");
}
|
