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|
use crate::{
frame::Frame,
helpers::{pixel::Pixel, vector::Vec2},
refsampler::Sampler,
};
use std::ops::{Index, IndexMut};
#[derive(Debug, Clone)]
pub struct View<T> {
pub frame: T,
pub offset: Vec2<isize>,
pub size: Vec2<isize>,
}
impl<T> View<T> {
pub fn new(frame: T, offset: Vec2<isize>, size: Vec2<isize>) -> Self {
Self {
frame,
offset,
size,
}
}
pub fn area(&self) -> isize {
self.size.x * self.size.y
}
pub fn center(&self) -> Vec2<isize> {
self.offset + self.size.downscale(2)
}
}
impl<T> View<&mut T> {
pub fn split_mut_unsafe(&mut self) -> [Self; 2] {
let vert = self.size.x > self.size.y;
[
Self {
frame: unsafe { std::mem::transmute::<&mut T, &mut T>(&mut self.frame) },
offset: self.offset,
size: if vert {
Vec2 {
x: self.size.x / 2,
y: self.size.y,
}
} else {
Vec2 {
x: self.size.x,
y: self.size.y / 2,
}
},
},
Self {
frame: unsafe { std::mem::transmute::<&mut T, &mut T>(&mut self.frame) },
offset: if vert {
Vec2 {
x: self.offset.x + self.size.x / 2,
y: self.offset.y,
}
} else {
Vec2 {
x: self.offset.x,
y: self.offset.y + self.size.y / 2,
}
},
size: if vert {
Vec2 {
x: self.size.x - self.size.x / 2,
y: self.size.y,
}
} else {
Vec2 {
x: self.size.x,
y: self.size.y - self.size.y / 2,
}
},
},
]
}
}
impl<T: Copy> View<T> {
pub fn offset(&self, offset: Vec2<isize>) -> Self {
Self {
frame: self.frame,
offset: self.offset + offset,
size: self.size,
}
}
pub fn split(&self) -> [Self; 2] {
let vert = self.size.x > self.size.y;
[
Self {
frame: self.frame,
offset: self.offset,
size: if vert {
Vec2 {
x: self.size.x / 2,
y: self.size.y,
}
} else {
Vec2 {
x: self.size.x,
y: self.size.y / 2,
}
},
},
Self {
frame: self.frame,
offset: if vert {
Vec2 {
x: self.offset.x + self.size.x / 2,
y: self.offset.y,
}
} else {
Vec2 {
x: self.offset.x,
y: self.offset.y + self.size.y / 2,
}
},
size: if vert {
Vec2 {
x: self.size.x - self.size.x / 2,
y: self.size.y,
}
} else {
Vec2 {
x: self.size.x,
y: self.size.y - self.size.y / 2,
}
},
},
]
}
}
impl<T: Index<Vec2<isize>, Output = Pixel>> View<&T> {
pub fn diff(va: &Self, vb: &Self) -> f64 {
assert_eq!(va.size, vb.size);
let mut acc = 0;
for x in 0..va.size.x {
for y in 0..va.size.y {
let a = va[(x, y)];
let b = vb[(x, y)];
acc += Pixel::distance(a, b);
}
}
acc as f64
}
pub fn diff_sampler(va: &Self, vb: &Sampler<'_>) -> f64 {
assert_eq!(va.size, vb.view.size);
let mut acc = 0;
for x in 0..va.size.x {
for y in 0..va.size.y {
let a = va[(x, y)];
let b = vb.sample(Vec2 {
x: x as f32,
y: y as f32,
});
acc += Pixel::distance(a, b);
}
}
acc as f64
}
pub fn pixels(&self) -> Vec<Pixel> {
let mut v = vec![];
for y in 0..self.size.y {
for x in 0..self.size.x {
v.push(self[(x, y)]);
}
}
v
}
}
impl View<&mut Frame> {
pub fn copy_from(&mut self, other: &View<&Frame>) {
for x in 0..self.size.x {
for y in 0..self.size.y {
self[(x, y)] = other[(x, y)];
}
}
}
pub fn copy_from_sampler(&mut self, other: &Sampler) {
for x in 0..self.size.x {
for y in 0..self.size.y {
self[(x, y)] = other.sample((x, y).into());
}
}
}
pub fn set_pixels(&mut self, pixels: &Vec<Pixel>) {
for y in 0..self.size.y {
for x in 0..self.size.x {
self[(x, y)] = pixels[(y * self.size.x + x) as usize]
}
}
}
}
impl View<&Frame> {
pub fn sample(&self, p: Vec2<f32>) -> Pixel {
self.frame.sample(p + self.offset.into())
}
}
impl<T: Index<Vec2<isize>, Output = Pixel>> Index<Vec2<isize>> for View<&T> {
type Output = Pixel;
#[inline]
fn index(&self, p: Vec2<isize>) -> &Self::Output {
&self.frame[self.offset + p]
}
}
impl<T: Index<Vec2<isize>, Output = Pixel>> Index<Vec2<isize>> for View<&mut T> {
type Output = Pixel;
#[inline]
fn index(&self, p: Vec2<isize>) -> &Self::Output {
&self.frame[self.offset + p]
}
}
impl<T: IndexMut<Vec2<isize>, Output = Pixel>> IndexMut<Vec2<isize>> for View<&mut T> {
#[inline]
fn index_mut(&mut self, p: Vec2<isize>) -> &mut Self::Output {
&mut self.frame[self.offset + p]
}
}
impl<T: Index<Vec2<isize>, Output = Pixel>> Index<(isize, isize)> for View<&T> {
type Output = Pixel;
#[inline]
fn index(&self, (x, y): (isize, isize)) -> &Self::Output {
&self[Vec2 { x, y }]
}
}
impl<T: Index<Vec2<isize>, Output = Pixel>> Index<(isize, isize)> for View<&mut T> {
type Output = Pixel;
#[inline]
fn index(&self, (x, y): (isize, isize)) -> &Self::Output {
&self[Vec2 { x, y }]
}
}
impl<T: IndexMut<Vec2<isize>, Output = Pixel>> IndexMut<(isize, isize)> for View<&mut T> {
#[inline]
fn index_mut(&mut self, (x, y): (isize, isize)) -> &mut Self::Output {
&mut self[Vec2 { x, y }]
}
}
|
