Struct image::Luma

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

Grayscale colors

Trait Implementations

impl<T: Clone + Primitive> Clone for Luma<T>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Primitive> Debug for Luma<T>

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

Formats the value using the given formatter.

impl<T: Primitive + 'static> From<[T; 1]> for Luma<T>

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

Performs the conversion.

impl<T: Hash + Primitive> Hash for Luma<T>

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

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

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

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

impl<T: PartialEq + Primitive> PartialEq<Luma<T>> for Luma<T>

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<T: Primitive + 'static> Pixel for Luma<T>

type Subpixel = T

The underlying subpixel type.

const CHANNEL_COUNT: u8

The number of channels of this pixel type.

const COLOR_MODEL: &'static str

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

const COLOR_TYPE: ColorType

ColorType for this pixel format

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)

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>

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_bgr(&self) -> Bgr<T>

Convert this pixel to BGR

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

Convert this pixel to RGB with an alpha channel

fn to_bgra(&self) -> Bgra<T>

Convert this pixel to BGR 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: &Self, 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 channel_count() -> u8

👎 Deprecated:

please use CHANNEL_COUNT associated constant

Returns the number of channels of this pixel type.

fn color_model() -> &'static str

👎 Deprecated:

please use COLOR_MODEL associated constant

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

fn color_type() -> ColorType

👎 Deprecated:

please use COLOR_TYPE associated constant

Returns the ColorType for this pixel format

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<T: Copy + Primitive> Copy for Luma<T>

impl<T: Eq + Primitive> Eq for Luma<T>

impl<T: Primitive> StructuralEq for Luma<T>

impl<T: Primitive> StructuralPartialEq for Luma<T>