Struct fimg::ImageCloner

pub struct ImageCloner<'a, const C: usize>(/* private fields */);

A neat way to clone a image.

Consider it a way to clone->apply a image operation, but better. Please note that some methods may(although none at current) have different safety invariants from their in place counterparts.

Implementations

impl<const CHANNELS: usize> ImageCloner<'_, CHANNELS>

pub fn flip_v(&self) -> Image<Vec<u8>, CHANNELS>

Flip an image vertically.

let a = Image::<_, 1>::build(2,2).buf(vec![21,42,90,01]);
assert_eq!(a.cloner().flip_v().take_buffer(), [90,01,21,42]);

pub fn flip_h(&self) -> Image<Vec<u8>, CHANNELS>

Flip an image horizontally

let a = Image::<_,1>::build(2,2).buf(vec![90,01,21,42]);
assert_eq!(a.cloner().flip_h().take_buffer(), [01,90,42,21]);

impl<const CHANNELS: usize> ImageCloner<'_, CHANNELS>

pub fn rot_180(&self) -> Image<Vec<u8>, CHANNELS>

Rotate an image 180 degrees clockwise.

let a = Image::<_,1>::build(2,2).buf(vec![00,01,02,10]);
assert_eq!(a.cloner().rot_180().take_buffer(), vec![10,02,01,00]);

pub unsafe fn rot_90(&self) -> Image<Vec<u8>, CHANNELS>

Rotate an image 90 degrees clockwise.

Safety

UB if the image is not square

pub unsafe fn rot_270(&self) -> Image<Vec<u8>, CHANNELS>

Rotate an image 270 degrees clockwise, or 90 degrees anti clockwise.

Safety

UB if the image is not square

impl<'a, const C: usize> ImageCloner<'a, C>

pub const fn from(i: Image<&'a [u8], C>) -> Self

Create a ImageCloner from a Image<&[u8]>

Methods from Deref<Target = Image<&'a [u8], C>>

pub fn crop<'a, U: 'a>( &'a self, width: u32, height: u32 ) -> impl Cropper<&'a [U], C>

where T: AsRef<[U]>,

Crop a image.

The signature looks something like: i.crop(width, height).from(top_left_x, top_left_y), which gives you a SubImage<&[T], _>

If you want a owned image, i.crop(w, h).from(x, y).own() gets you a Image<Box<[T], _>> back.

let mut i = Image::<_, 1>::build(4, 3).buf([
   1, 2, 3, 1,
   4, 5, 6, 2,
   7, 8, 9, 3,
]);
let c = i.crop(2, 2).from(1, 1);
assert_eq!(c.pixel(0, 0), [5]);
assert_eq!(c.pixel(1, 1), [9]);
assert_eq!(
  c.own().bytes(),
  &[5, 6,
    8, 9]
);

Panics

if width == 0 || height == 0

pub fn wgpu_size(&self) -> Extent3d

Available on crate feature wgpu-convert only.

Get the size as a [wgpu::Extend3d].

pub fn send(&self, dev: &Device, q: &Queue, usage: TextureUsages) -> Texture

Available on crate feature wgpu-convert only.

Upload this image to the gpu, returning a wgpu::Texture.

pub fn scale<A: ScalingAlgorithm>( &self, width: u32, height: u32 ) -> Image<Box<[u8]>, 1>

Available on crate feature scale only.

Scale a Y image with a given scaling algorithm.

pub fn scale<A: ScalingAlgorithm>( &self, width: u32, height: u32 ) -> Image<Box<[u8]>, 3>

Available on crate feature scale only.

Scale a RGB image with a given scaling algorithm.

pub unsafe fn repeated( &self, out_width: u32, out_height: u32 ) -> Image<Vec<u8>, 3>

Tile self till it fills a new image of size x, y

Safety

UB if self’s width is not a multiple of x, or self’s height is not a multiple of y

let x: Image<&[u8], 3> = Image::build(8, 8).buf(include_bytes!("../benches/3_8x8.imgbuf"));
let tiled = unsafe { x.repeated(48, 48) }; // repeat 6 times

pub fn height(&self) -> u32

get the height as a u32

pub fn width(&self) -> u32

get the width as a u32

pub fn buffer(&self) -> &T

returns a immutable reference to the backing buffer

pub fn to_owned(&self) -> Image<Vec<T>, CHANNELS>

Allocate a new Image<Vec<T>> from this imageref.

pub fn to_owned(&self) -> Image<Vec<T>, CHANNELS>

Allocate a new Image<Vec<T>> from this mutable imageref.

pub fn copy(&self) -> Self

Copy this ref image

pub fn len<U>(&self) -> usize

where T: AsRef<[U]>,

The size of the underlying buffer.

pub fn chunked<'a, U: 'a>( &'a self ) -> impl DoubleEndedIterator<Item = &'a [U; CHANNELS]>

where T: AsRef<[U]>,

Returns a iterator over every pixel

pub fn flatten<U>(&self) -> &[[U; CHANNELS]]

where T: AsRef<[U]>,

Flatten the chunks of this image into a slice of slices.

pub fn as_ref<U>(&self) -> Image<&[U], CHANNELS>

where T: AsRef<[U]>,

Reference this image.

pub unsafe fn pixel<U: Copy>(&self, x: u32, y: u32) -> [U; CHANNELS]

where T: AsRef<[U]>,

Return a pixel at (x, y).

Safety

• UB if x, y is out of bounds
• UB if buffer is too small

pub fn bytes(&self) -> &[u8]

Bytes of this image.

pub fn cloner(&self) -> ImageCloner<'_, CHANNELS>

Procure a ImageCloner.

pub fn save(&self, f: impl AsRef<Path>)

Available on crate feature save only.

Save this RGB image.

pub fn save(&self, f: impl AsRef<Path>)

Available on crate feature save only.

Save this RGBA image.

pub fn save(&self, f: impl AsRef<Path>)

Available on crate feature save only.

Save this YA image.

pub fn save(&self, f: impl AsRef<Path>)

Available on crate feature save only.

Save this Y image.

Trait Implementations

impl ClonerOverlay<4, 3> for ImageCloner<'_, 3>

unsafe fn overlay(&self, with: &Image<&[u8], 4>) -> Image<Vec<u8>, 3>

Overlay with => self (does not blend)

impl ClonerOverlay<4, 4> for ImageCloner<'_, 4>

unsafe fn overlay(&self, with: &Image<&[u8], 4>) -> Image<Vec<u8>, 4>

Overlay with => self (does not blend)

impl ClonerOverlayAt<3, 3> for ImageCloner<'_, 3>

unsafe fn overlay_at( &self, with: &Image<&[u8], 3>, x: u32, y: u32 ) -> Image<Vec<u8>, 3>

Overlay a RGB image(with) => self at coordinates x, y. As this is a RGBxRGB operation, blending is unnecessary, and this is simply a copy.

Safety

UB if x, y is out of bounds

impl ClonerOverlayAt<4, 3> for ImageCloner<'_, 3>

unsafe fn overlay_at( &self, with: &Image<&[u8], 4>, x: u32, y: u32 ) -> Image<Vec<u8>, 3>

Overlay with => self at coordinates x, y, without blending, and returning a new image.

impl ClonerOverlayAt<4, 4> for ImageCloner<'_, 4>

unsafe fn overlay_at( &self, with: &Image<&[u8], 4>, x: u32, y: u32 ) -> Image<Vec<u8>, 4>

Overlay with => self at coordinates x, y, without blending, and returning a new image.

impl<'a, const C: usize> Deref for ImageCloner<'a, C>

type Target = Image<&'a [u8], C>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.