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use std::ops;
use crate::{reader::FileReader, writer::FileWriter};
type FullColorDepth = u32;
pub trait ColorDepth: Clone
{
const DEFAULT: Self;
fn from_full_color(x: FullColorDepth) -> Self;
fn to_full_color(&self) -> FullColorDepth;
fn convert<T: ColorDepth>(&self) -> T
{
T::from_full_color(self.to_full_color())
}
}
impl ColorDepth for u8 {
const DEFAULT: Self = 0;
fn from_full_color(x: FullColorDepth) -> Self {(x>>24) as Self}
fn to_full_color(&self) -> FullColorDepth { (*self as FullColorDepth) << 24 }
}
impl ColorDepth for u16 {
const DEFAULT: Self = 0;
fn from_full_color(x: FullColorDepth) -> Self {(x>>16) as Self}
fn to_full_color(&self) -> FullColorDepth { (*self as FullColorDepth) << 16 }
}
impl ColorDepth for u32 {
const DEFAULT: Self = 0;
fn from_full_color(x: FullColorDepth) -> Self {x}
fn to_full_color(&self) -> FullColorDepth { *self }
}
#[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,
}
type FullColorPixel = RGBA<FullColorDepth>;
pub trait ColorType: Clone
{
const DEFAULT: Self;
fn from_full_color(x: FullColorPixel) -> Self;
fn to_full_color(&self) -> FullColorPixel;
fn convert<T: ColorType>(&self) -> T
{
T::from_full_color(self.to_full_color())
}
}
impl<T: ColorDepth> ColorType for RGBA<T>
{
const DEFAULT: Self = Self { r: T::DEFAULT, g: T::DEFAULT, b: T::DEFAULT, a: T::DEFAULT };
fn from_full_color(x: FullColorPixel) -> Self {
Self
{
r: T::from_full_color(x.r),
g: T::from_full_color(x.g),
b: T::from_full_color(x.b),
a: T::from_full_color(x.a),
}
}
fn to_full_color(&self) -> FullColorPixel {
RGBA {
r: T::to_full_color(&self.r),
g: T::to_full_color(&self.g),
b: T::to_full_color(&self.b),
a: T::to_full_color(&self.a),
}
}
}
impl<T: ColorDepth> ColorType for RGB<T>
{
const DEFAULT: Self = Self { r: T::DEFAULT, g: T::DEFAULT, b: T::DEFAULT};
fn from_full_color(x: FullColorPixel) -> Self {
Self
{
r: T::from_full_color(x.r),
g: T::from_full_color(x.g),
b: T::from_full_color(x.b)
}
}
fn to_full_color(&self) -> FullColorPixel {
RGBA {
r: T::to_full_color(&self.r),
g: T::to_full_color(&self.g),
b: T::to_full_color(&self.b),
a: u32::max_value()
}
}
}
#[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<T: ColorType>
{
pub bpp: u8,
pub pixels: PixelArr<T>
}
pub trait Image<T: ColorType>
{
fn read_image(reader: &mut FileReader) -> Result<ImageBase<T>, String>;
fn write_image(image: &ImageBase<T>, writer: &mut FileWriter)-> ();
}
|
