bendns' repos / mindus
mindustry logic execution, map- and schematic- parsing and rendering
Diffstat (limited to 'src/utils/image/affine.rs')
-rw-r--r--src/utils/image/affine.rs186
1 files changed, 0 insertions, 186 deletions
diff --git a/src/utils/image/affine.rs b/src/utils/image/affine.rs
deleted file mode 100644
index f2b23bf..0000000
--- a/src/utils/image/affine.rs
+++ /dev/null
@@ -1,186 +0,0 @@
-use super::Image;
-
-/// Rotate a image 180 degrees clockwise.
-pub fn rot_180<const CHANNELS: usize>(img: &mut Image<&mut [u8], CHANNELS>) {
- for y in 0..img.height() / 2 {
- for x in 0..img.width() {
- let p = unsafe { img.pixel(x, y) };
- let x2 = img.width() - x - 1;
- let y2 = img.height() - y - 1;
- let p2 = unsafe { img.pixel(x2, y2) };
- unsafe { img.set_pixel(x, y, p2) };
- unsafe { img.set_pixel(x2, y2, p) };
- }
- }
-
- if img.height() % 2 != 0 {
- let middle = img.height() / 2;
-
- for x in 0..img.width() / 2 {
- let p = unsafe { img.pixel(x, middle) };
- let x2 = img.width() - x - 1;
- let p2 = unsafe { img.pixel(x2, middle) };
- unsafe { img.set_pixel(x, middle, p2) };
- unsafe { img.set_pixel(x2, middle, p) };
- }
- }
-}
-
-/// # Safety
-///
-/// UB if supplied image rectangular
-unsafe fn transpose<const CHANNELS: usize>(img: &mut Image<&mut [u8], CHANNELS>) {
- debug_assert_eq!(img.width(), img.height());
- let size = img.width();
- for i in 0..size {
- for j in i..size {
- for c in 0..CHANNELS {
- // SAFETY: caller gurantees rectangularity
- unsafe {
- img.buffer.swap_unchecked(
- (i * size + j) as usize * CHANNELS + c,
- (j * size + i) as usize * CHANNELS + c,
- )
- };
- }
- }
- }
-}
-
-/// Rotate a image 90 degrees clockwise.
-/// This is done by first [flipping vertically](flip_v), then [transposing](transpose) the image, to save allocations.
-///
-/// # Safety
-///
-/// UB if the image is not square
-#[inline]
-pub unsafe fn rot_90<const CHANNELS: usize>(img: &mut Image<&mut [u8], CHANNELS>) {
- flip_v(img);
- // SAFETY: caller ensures rectangularity
- unsafe { transpose(img) };
-}
-
-/// Rotate a image 270 degrees clockwise, or 90 degrees anti clockwise.
-/// [horizontal flip](flip_h), then [transpose].
-///
-/// # Safety
-///
-/// UB if the image is not square
-#[inline]
-pub unsafe fn rot_270<const CHANNELS: usize>(img: &mut Image<&mut [u8], CHANNELS>) {
- flip_h(img);
- // SAFETY: caller ensures rectangularity
- unsafe { transpose(img) };
-}
-
-/// Flip a image vertically.
-pub fn flip_v<const CHANNELS: usize>(img: &mut Image<&mut [u8], CHANNELS>) {
- for y in 0..img.height() / 2 {
- for x in 0..img.width() {
- let y2 = img.height() - y - 1;
- // SAFETY: within bounds
- let p2 = unsafe { img.pixel(x, y2) };
- let p = unsafe { img.pixel(x, y) };
- unsafe { img.set_pixel(x, y2, p) };
- unsafe { img.set_pixel(x, y, p2) };
- }
- }
-}
-
-/// Flip a image horizontally.
-pub fn flip_h<const CHANNELS: usize>(img: &mut Image<&mut [u8], CHANNELS>) {
- for y in 0..img.height() {
- for x in 0..img.width() / 2 {
- let x2 = img.width() - x - 1;
- let p2 = unsafe { img.pixel(x2, y) };
- let p = unsafe { img.pixel(x, y) };
- unsafe { img.set_pixel(x2, y, p) };
- unsafe { img.set_pixel(x, y, p2) };
- }
- }
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
- use crate::utils::image::img;
-
- #[test]
- fn rotate_90() {
- let mut from = img![
- [00, 01]
- [02, 10]
- ];
- unsafe { rot_90(&mut from.as_mut()) };
- assert_eq!(
- from,
- img![
- [02, 00]
- [10, 01]
- ]
- );
- }
-
- #[test]
- fn rotate_180() {
- let mut from = img![
- [00, 01]
- [02, 10]
- ];
- rot_180(&mut from.as_mut());
- assert_eq!(
- from,
- img![
- [10, 02]
- [01, 00]
- ]
- );
- }
-
- #[test]
- fn rotate_270() {
- let mut from = img![
- [00, 01]
- [20, 10]
- ];
- unsafe { rot_270(&mut from.as_mut()) };
- assert_eq!(
- from,
- img![
- [01, 10]
- [00, 20]
- ]
- );
- }
-
- #[test]
- fn flip_vertical() {
- let mut from = img![
- [90, 01]
- [21, 42]
- ];
- flip_v(&mut from.as_mut());
- assert_eq!(
- from,
- img![
- [21, 42]
- [90, 01]
- ]
- )
- }
- #[test]
- fn flip_horizontal() {
- let mut from = img![
- [90, 01]
- [21, 42]
- ];
- flip_h(&mut from.as_mut());
- assert_eq!(
- from,
- img![
- [01, 90]
- [42, 21]
- ]
- )
- }
-}