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Improve circle rendering and add antialiasing to rounded rect

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Chlorospingus
2025-04-29 03:30:33 -07:00
parent e81ff0be66
commit cbe54334ca
2 changed files with 40 additions and 21 deletions
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57
src/graphics/rectangle.rs
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@@ -1,3 +1,5 @@
use std::usize;
use crate::wayland::shm::ShmPool;
fn color_blend(col1: u32, col2: u32, diff: f64) -> u32 {
@@ -46,29 +48,46 @@ impl ShmPool {
radius: usize,
color: u32
) {
for l_row in 0..radius+1 {
let x_diff = radius - ((radius*radius - l_row*l_row) as f64).sqrt() as usize;
self.write(&vec![color; w - (2*x_diff)], (y+radius-l_row)*self.width + x + x_diff);
self.write(&vec![color; w - (2*x_diff)], (y+h-radius+l_row)*self.width + x + x_diff);
for l_row in 1..radius {
let inner_diff = (((radius-1).pow(2) - l_row.pow(2)) as f64).sqrt();
let outer_diff = ((radius.pow(2) - l_row.pow(2)) as f64).sqrt();
self.write(&vec![color; w - (2*(radius - inner_diff.floor() as usize-1))], (y+radius-l_row)*self.width + x + radius - inner_diff.floor() as usize-1);
self.write(&vec![color; w - (2*(radius - inner_diff.floor() as usize-1))], (y+h-radius+l_row)*self.width + x + radius - inner_diff.floor() as usize-1);
for l_col in inner_diff.floor() as usize+1..outer_diff.ceil() as usize {
let distance = ((l_row.pow(2) + l_col.pow(2)) as f64).sqrt();
let offset = (y+radius-l_row)*self.width + x + radius - l_col - 1;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
let offset = (y+radius-l_row)*self.width + x + w - radius + l_col;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
let offset = (y+h-radius+l_row)*self.width + x + radius - l_col - 1;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
let offset = (y+h-radius+l_row)*self.width + x + w - radius + l_col;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
}
}
for g_row in y+radius..y+h-radius {
for g_row in y+radius..y+h-radius+1 {
self.write(&vec![color; w], g_row*self.width+x);
}
}
pub fn shitty_circle(&mut self, x: usize, y: usize, radius: usize, color: u32) {
for g_row in y-radius..y+radius+1 {
for g_col in x-radius..x+radius+1 {
let l_row = y.abs_diff(g_row);
let l_col = y.abs_diff(g_col);
let distance = (((l_row*l_row)+(l_col*l_col)) as f64).sqrt();
let offset = g_row*self.width + g_col;
if (distance.floor() as usize) < radius {
self.write_pixel(color, offset as isize);
} else if (distance.ceil() as usize) <= radius+1 {
dbg!(distance);
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
}
// x and y are center of circle
pub fn circle(&mut self, x: usize, y: usize, radius: usize, color: u32) {
for l_row in 1..radius {
let inner_diff = (((radius-1).pow(2) - l_row.pow(2)) as f64).sqrt();
let outer_diff = ((radius.pow(2) - l_row.pow(2)) as f64).sqrt();
let row: Vec<u32> = vec![color; 2*(inner_diff.floor() as usize)];
self.write(&row, (y-l_row)*self.width + x - inner_diff.floor() as usize);
self.write(&row, (y+l_row-1)*self.width + x - inner_diff.floor() as usize);
for l_col in (inner_diff.floor() as usize+1)..(outer_diff.ceil() as usize) {
let distance = ((l_row.pow(2) + l_col.pow(2)) as f64).sqrt();
let offset = (y-l_row)*self.width + x - l_col;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
let offset = (y-l_row)*self.width + x + l_col-1;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
let offset = (y+l_row-1)*self.width + x - l_col;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
let offset = (y+l_row-1)*self.width + x + l_col-1;
self.write_pixel(color_blend(color, self.read_pixel(offset), distance.fract()), offset as isize);
}
}
}