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use super::{draw_pixel_safe, draw_pixel_unsafe};
use crate::render::{BufferMetrics, BufferPointers};
#[inline]
#[allow(clippy::cast_sign_loss)]
/// Draws a circle outline using the Midpoint Circle Algorithm
pub fn draw_circle_outline<const SAFE: bool>(
buffer: &mut (impl BufferPointers + BufferMetrics),
pos_x: usize,
pos_y: usize,
radius: usize,
color: u32,
) {
let mut x = 0;
let mut y = radius as isize;
let mut p = 1 - y;
while x <= y {
let tx = x as usize;
let ty = y as usize;
if SAFE {
draw_pixel_safe(buffer, (pos_x + tx, pos_y + ty), color);
draw_pixel_safe(buffer, (pos_x - tx, pos_y + ty), color);
draw_pixel_safe(buffer, (pos_x + tx, pos_y - ty), color);
draw_pixel_safe(buffer, (pos_x - tx, pos_y - ty), color);
draw_pixel_safe(buffer, (pos_x + ty, pos_y + tx), color);
draw_pixel_safe(buffer, (pos_x + ty, pos_y - tx), color);
draw_pixel_safe(buffer, (pos_x - ty, pos_y + tx), color);
draw_pixel_safe(buffer, (pos_x - ty, pos_y - tx), color);
} else {
draw_pixel_unsafe(buffer, (pos_x + tx, pos_y + ty), color);
draw_pixel_unsafe(buffer, (pos_x - tx, pos_y + ty), color);
draw_pixel_unsafe(buffer, (pos_x + tx, pos_y - ty), color);
draw_pixel_unsafe(buffer, (pos_x - tx, pos_y - ty), color);
draw_pixel_unsafe(buffer, (pos_x + ty, pos_y + tx), color);
draw_pixel_unsafe(buffer, (pos_x + ty, pos_y - tx), color);
draw_pixel_unsafe(buffer, (pos_x - ty, pos_y + tx), color);
draw_pixel_unsafe(buffer, (pos_x - ty, pos_y - tx), color);
}
x += 1;
if p < 0 {
p += 2 * x + 1;
} else {
y -= 1;
p += 2 * (x - y) + 1;
}
}
}
/// Draw a circle but instead of drawing it with a width of 1 you can define your own width
pub fn draw_circle_outline_with_thickness<const SAFE: bool>(
buffer: &mut (impl BufferPointers + BufferMetrics),
pos_x: usize,
pos_y: usize,
radius: usize,
color: u32,
width: usize,
) {
let mut x = 0;
let mut y = radius as isize;
let mut p = 1 - y;
while x <= y {
for dx in -(width as isize) / 2..=(width as isize) / 2 {
for dy in -(width as isize) / 2..=(width as isize) / 2 {
if SAFE {
draw_pixel_safe(
buffer,
(
(pos_x as isize + x + dx) as usize,
(pos_y as isize + y + dy) as usize,
),
color,
);
draw_pixel_safe(
buffer,
(
(pos_x as isize - x + dx) as usize,
(pos_y as isize + y + dy) as usize,
),
color,
);
draw_pixel_safe(
buffer,
(
(pos_x as isize + x + dx) as usize,
(pos_y as isize - y + dy) as usize,
),
color,
);
draw_pixel_safe(
buffer,
(
(pos_x as isize - x + dx) as usize,
(pos_y as isize - y + dy) as usize,
),
color,
);
draw_pixel_safe(
buffer,
(
(pos_x as isize + y + dx) as usize,
(pos_y as isize + x + dy) as usize,
),
color,
);
draw_pixel_safe(
buffer,
(
(pos_x as isize + y + dx) as usize,
(pos_y as isize - x + dy) as usize,
),
color,
);
draw_pixel_safe(
buffer,
(
(pos_x as isize - y + dx) as usize,
(pos_y as isize + x + dy) as usize,
),
color,
);
draw_pixel_safe(
buffer,
(
(pos_x as isize - y + dx) as usize,
(pos_y as isize - x + dy) as usize,
),
color,
);
} else {
draw_pixel_unsafe(
buffer,
(
(pos_x as isize + x + dx) as usize,
(pos_y as isize + y + dy) as usize,
),
color,
);
draw_pixel_unsafe(
buffer,
(
(pos_x as isize - x + dx) as usize,
(pos_y as isize + y + dy) as usize,
),
color,
);
draw_pixel_unsafe(
buffer,
(
(pos_x as isize + x + dx) as usize,
(pos_y as isize - y + dy) as usize,
),
color,
);
draw_pixel_unsafe(
buffer,
(
(pos_x as isize - x + dx) as usize,
(pos_y as isize - y + dy) as usize,
),
color,
);
draw_pixel_unsafe(
buffer,
(
(pos_x as isize + y + dx) as usize,
(pos_y as isize + x + dy) as usize,
),
color,
);
draw_pixel_unsafe(
buffer,
(
(pos_x as isize + y + dx) as usize,
(pos_y as isize - x + dy) as usize,
),
color,
);
draw_pixel_unsafe(
buffer,
(
(pos_x as isize - y + dx) as usize,
(pos_y as isize + x + dy) as usize,
),
color,
);
draw_pixel_unsafe(
buffer,
(
(pos_x as isize - y + dx) as usize,
(pos_y as isize - x + dy) as usize,
),
color,
);
}
}
}
x += 1;
if p < 0 {
p += 2 * x + 1;
} else {
y -= 1;
p += 2 * (x - y) + 1;
}
}
}