Struct Luma

#[repr(C)]
pub struct Luma<T>(pub [T; 1]);

Grayscale colors.

Tuple Fields

0: [T; 1]

Trait Implementations

impl<T> Clone for Luma<T>

where T: Clone,

fn clone(&self) -> Luma<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Luma<T>

where T: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<T> From<[T; 1]> for Luma<T>

fn from(c: [T; 1]) -> Luma<T>

Converts to this type from the input type.

impl<T> Hash for Luma<T>

where T: Hash,

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T> Index<usize> for Luma<T>

type Output = T

The returned type after indexing.

fn index(&self, _index: usize) -> &T

Performs the indexing (container[index]) operation.

impl<T> IndexMut<usize> for Luma<T>

fn index_mut(&mut self, _index: usize) -> &mut T

Performs the mutable indexing (container[index]) operation.

impl<T> PartialEq for Luma<T>

where T: PartialEq,

fn eq(&self, other: &Luma<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T> Pixel for Luma<T>

where T: Primitive,

const CHANNEL_COUNT: u8 = 1u8

The number of channels of this pixel type.

const COLOR_MODEL: &'static str = "Y"

A string that can help to interpret the meaning each channel See gimp babl.

type Subpixel = T

The scalar type that is used to store each channel in this pixel.

fn channels(&self) -> &[T]

Returns the components as a slice.

fn channels_mut(&mut self) -> &mut [T]

Returns the components as a mutable slice

fn channels4(&self) -> (T, T, T, T)

👎Deprecated since 0.24.0: Use channels() or channels_mut()

Returns the channels of this pixel as a 4 tuple. If the pixel has less than 4 channels the remainder is filled with the maximum value

fn from_channels(a: T, b: T, c: T, d: T) -> Luma<T>

👎Deprecated since 0.24.0: Use the constructor of the pixel, for example Rgba([r,g,b,a]) or Pixel::from_slice

Construct a pixel from the 4 channels a, b, c and d. If the pixel does not contain 4 channels the extra are ignored.

fn from_slice(slice: &[T]) -> &Luma<T>

Returns a view into a slice.

fn from_slice_mut(slice: &mut [T]) -> &mut Luma<T>

Returns mutable view into a mutable slice.

fn to_rgb(&self) -> Rgb<T>

Convert this pixel to RGB

fn to_rgba(&self) -> Rgba<T>

Convert this pixel to RGB with an alpha channel

fn to_luma(&self) -> Luma<T>

Convert this pixel to luma

fn to_luma_alpha(&self) -> LumaA<T>

Convert this pixel to luma with an alpha channel

fn map<F>(&self, f: F) -> Luma<T>

where F: FnMut(T) -> T,

Apply the function f to each channel of this pixel.

fn apply<F>(&mut self, f: F)

where F: FnMut(T) -> T,

Apply the function f to each channel of this pixel.

fn map_with_alpha<F, G>(&self, f: F, g: G) -> Luma<T>

where F: FnMut(T) -> T, G: FnMut(T) -> T,

Apply the function f to each channel except the alpha channel. Apply the function g to the alpha channel.

fn apply_with_alpha<F, G>(&mut self, f: F, g: G)

where F: FnMut(T) -> T, G: FnMut(T) -> T,

Apply the function f to each channel except the alpha channel. Apply the function g to the alpha channel. Works in-place.

fn map2<F>(&self, other: &Luma<T>, f: F) -> Luma<T>

where F: FnMut(T, T) -> T,

Apply the function f to each channel of this pixel and other pairwise.

fn apply2<F>(&mut self, other: &Luma<T>, f: F)

where F: FnMut(T, T) -> T,

Apply the function f to each channel of this pixel and other pairwise. Works in-place.

fn invert(&mut self)

Invert this pixel

fn blend(&mut self, other: &Luma<T>)

Blend the color of a given pixel into ourself, taking into account alpha channels

fn map_without_alpha<F>(&self, f: F) -> Self

where F: FnMut(Self::Subpixel) -> Self::Subpixel,

Apply the function f to each channel except the alpha channel.

fn apply_without_alpha<F>(&mut self, f: F)

where F: FnMut(Self::Subpixel) -> Self::Subpixel,

Apply the function f to each channel except the alpha channel. Works in place.

impl PixelWithColorType for Luma<u16>

const COLOR_TYPE: ColorType = ColorType::L16

This pixel has the format of one of the predefined ColorTypes, such as Rgb8, La16 or Rgba32F. This is needed for automatically detecting a color format when saving an image as a file.

impl PixelWithColorType for Luma<u8>

const COLOR_TYPE: ColorType = ColorType::L8

This pixel has the format of one of the predefined ColorTypes, such as Rgb8, La16 or Rgba32F. This is needed for automatically detecting a color format when saving an image as a file.

impl<T> Copy for Luma<T>

where T: Copy,

impl<T> Eq for Luma<T>

where T: Eq,

impl<T> StructuralPartialEq for Luma<T>