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use std::ops;
use crate::{reader::FileReader, writer::FileWriter};
pub 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, Copy)]
pub struct RGBA<T: ColorDepth>
{
pub r: T,
pub g: T,
pub b: T,
pub a: T
}
#[derive(Debug, Clone, Copy)]
pub struct RGB<T: ColorDepth>
{
pub r: T,
pub g: T,
pub b: T,
}
pub 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)]
pub struct PixelArr<T: ColorType>
{
pub width: u32,
pub height: u32,
raw: Vec<T>
}
impl<T: ColorType> PixelArr<T> {
pub 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)]
pub struct ImageBase
{
pub bit_depth: u8,
pub pixels: PixelArr<RGB<u8>>
}
pub trait Image
{
fn read_image(reader: &mut FileReader) -> Result<ImageBase, &'static str>;
fn write_image(image: &ImageBase, writer: &mut FileWriter)-> ();
}
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