bendns' repos / fimg
fast image operations
Diffstat (limited to 'src/drawing/circle.rs')
-rw-r--r--src/drawing/circle.rs66
1 files changed, 0 insertions, 66 deletions
diff --git a/src/drawing/circle.rs b/src/drawing/circle.rs
deleted file mode 100644
index 421cb6a..0000000
--- a/src/drawing/circle.rs
+++ /dev/null
@@ -1,66 +0,0 @@
-//! draw 2d circles
-use crate::Image;
-
-impl<T: AsMut<[u8]> + AsRef<[u8]>, const CHANNELS: usize> Image<T, CHANNELS> {
- /// Draws a circle, using the [Bresenham's circle](https://en.wikipedia.org/wiki/Midpoint_circle_algorithm) algorithm.
- /// ```
- /// # use fimg::Image;
- /// let mut i = Image::alloc(50, 50);
- /// i.border_circle((25, 25), 20, [255]);
- /// # assert_eq!(i.buffer(), include_bytes!("../../tdata/circle.imgbuf"));
- /// ```
- pub fn border_circle(&mut self, (xc, yc): (i32, i32), radius: i32, c: [u8; CHANNELS]) {
- let mut x = 0;
- let mut y = radius;
- let mut p = 1 - radius;
- /// bounds the pixels
- macro_rules! bound {
- ($($x:expr,$y:expr);+;) => {
- $(if $x >= 0 && $x < self.width() as i32 && $y >= 0 && $y < self.height() as i32 {
- // SAFETY: ^
- unsafe { self.set_pixel($x as u32, $y as u32, &c) };
- })+
- };
- }
- while x <= y {
- bound! {
- xc + x, yc + y;
- xc + y, yc + x;
- xc - y, yc + x;
- xc - x, yc + y;
- xc - x, yc - y;
- xc - y, yc - x;
- xc + y, yc - x;
- xc + x, yc - y;
- };
- x += 1;
- if p < 0 {
- p += 2 * x + 1;
- } else {
- y -= 1;
- p += 2 * (x - y) + 1;
- }
- }
- }
-
- /// Draw a filled circle.
- /// ```
- /// # use fimg::Image;
- /// let mut i = Image::alloc(50, 50);
- /// i.circle((25, 25), 20, [255]);
- /// # assert_eq!(i.buffer(), include_bytes!("../../tdata/circle2.imgbuf"));
- /// ```
- pub fn circle(&mut self, (xc, yc): (i32, i32), radius: i32, c: [u8; CHANNELS]) {
- for x in -radius..radius {
- let h = ((radius * radius - x * x) as f32).sqrt().round() as i32;
- for y in -h..h {
- let x = x + xc;
- let y = y + yc;
- if x >= 0 && x < self.width() as i32 && y >= 0 && y < self.height() as i32 {
- // SAFETY: ^
- unsafe { self.set_pixel(x as u32, y as u32, &c) };
- }
- }
- }
- }
-}