Struct lodepng::GreyAlpha

#[repr(C)]
pub struct GreyAlpha<ComponentType, AlphaComponentType = ComponentType>(pub ComponentType, pub AlphaComponentType);

Grayscale with alpha. Use .0/.1 to access.

Tuple Fields

0: ComponentType

brightness level

1: AlphaComponentType

alpha

Implementations

impl<T, A> GrayAlpha<T, A>

where T: Clone,

pub fn gray(&self) -> Gray<T>

Copy Gray component out of the GrayAlpha struct

impl<T, A> GrayAlpha<T, A>

pub const fn new(brightness: T, alpha: A) -> GrayAlpha<T, A>

New grayscale+alpha pixel

pub fn gray_mut(&mut self) -> &mut Gray<T>

Provide a mutable view of only Gray component (leaving out alpha).

impl<T, A> GrayAlpha<T, A>

where T: Copy, A: Clone,

pub fn alpha(&self, a: A) -> GrayAlpha<T, A>

Create a new GrayAlpha with the new alpha value, but same gray value

pub fn map_alpha<F, B>(&self, f: F) -> GrayAlpha<T, B>

where F: FnOnce(A) -> B,

Create a new GrayAlpha with a new alpha value created by the callback.

pub fn map_gray<F, U, B>(&self, f: F) -> GrayAlpha<U, B>

where F: FnOnce(T) -> U, U: Clone, B: From<A> + Clone,

Create new GrayAlpha with the same alpha value, but different Gray value

Trait Implementations

impl<T> Add<T> for GrayAlpha<T>

where T: Copy + Add<Output = T>,

px + 1

type Output = GrayAlpha<T>

The resulting type after applying the + operator.

fn add(self, r: T) -> <GrayAlpha<T> as Add<T>>::Output

Performs the + operation.

impl<T, A> Add for GrayAlpha<T, A>

where T: Add, A: Add,

px + px

type Output = GrayAlpha<<T as Add>::Output, <A as Add>::Output>

The resulting type after applying the + operator.

fn add(self, other: GrayAlpha<T, A>) -> <GrayAlpha<T, A> as Add>::Output

Performs the + operation.

impl<T> AddAssign<T> for GrayAlpha<T>

where T: Copy + Add<Output = T>,

px + 1

fn add_assign(&mut self, r: T)

Performs the += operation.

impl<T, A> AddAssign for GrayAlpha<T, A>

where T: Add<Output = T> + Copy, A: Add<Output = A> + Copy,

px + px

fn add_assign(&mut self, other: GrayAlpha<T, A>)

Performs the += operation.

impl<T> AsMut<T> for GrayAlpha<T>

fn as_mut(&mut self) -> &mut T

Converts this type into a mutable reference of the (usually inferred) input type.

impl<T> AsPixels<GrayAlpha<T>> for [T]

fn as_pixels(&self) -> &[GrayAlpha<T>]

Reinterpret the slice as a read-only/shared slice of pixels. Multiple consecutive elements in the slice are intepreted as a single pixel (depending on format, e.g. 3 for RGB, 4 for RGBA).

fn as_pixels_mut(&mut self) -> &mut [GrayAlpha<T>]

Reinterpret the slice as a mutable/exclusive slice of pixels. Multiple consecutive elements in the slice are intepreted as a single pixel (depending on format, e.g. 3 for RGB, 4 for RGBA).

impl<T> AsRef<T> for GrayAlpha<T>

fn as_ref(&self) -> &T

Converts this type into a shared reference of the (usually inferred) input type.

impl<ComponentType, AlphaComponentType> Clone for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: Clone, AlphaComponentType: Clone,

fn clone(&self) -> GrayAlpha<ComponentType, AlphaComponentType>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T, A, B> ColorComponentMap<GrayAlpha<B, A>, T, B> for GrayAlpha<T, A>

where T: Copy, A: Copy,

fn map_c<F>(&self, f: F) -> GrayAlpha<B, A>

where F: FnMut(T) -> B,

Convenience function for applying the same formula to every rgb/gray component, but skipping the alpha component.

impl<T, B> ComponentMap<GrayAlpha<B>, T, B> for GrayAlpha<T>

where T: Copy,

fn map<F>(&self, f: F) -> GrayAlpha<B>

where F: FnMut(T) -> B,

Convenience function (equivalent of self.iter().map().collect()) for applying the same formula to every component.

impl<T> ComponentSlice<T> for GrayAlpha<T>

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

The components interpreted as an array, e.g. one RGB expands to 3 elements.

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

The components interpreted as a mutable array, e.g. one RGB expands to 3 elements.

impl<ComponentType, AlphaComponentType> Debug for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: Debug, AlphaComponentType: Debug,

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

Formats the value using the given formatter.

impl<ComponentType, AlphaComponentType> Default for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: Default, AlphaComponentType: Default,

fn default() -> GrayAlpha<ComponentType, AlphaComponentType>

Returns the “default value” for a type.

impl<T> Div<T> for GrayAlpha<T>

where T: Copy + Div<Output = T>,

px / 1

type Output = GrayAlpha<T>

The resulting type after applying the / operator.

fn div(self, r: T) -> <GrayAlpha<T> as Div<T>>::Output

Performs the / operation.

impl<T> DivAssign<T> for GrayAlpha<T>

where T: Copy + Div<Output = T>,

px * 1

fn div_assign(&mut self, r: T)

Performs the /= operation.

impl<T> From<Gray<T>> for GrayAlpha<T, u16>

where T: Copy,

Assumes 65535 is opaque

fn from(other: Gray<T>) -> GrayAlpha<T, u16>

Converts to this type from the input type.

impl<T> From<Gray<T>> for GrayAlpha<T, u8>

where T: Copy,

Assumes 255 is opaque

fn from(other: Gray<T>) -> GrayAlpha<T, u8>

Converts to this type from the input type.

impl<T, A> From<GrayAlpha<T, A>> for RGBA<T, A>

where T: Clone,

fn from(other: GrayAlpha<T, A>) -> RGBA<T, A>

Converts to this type from the input type.

impl<ComponentType, AlphaComponentType> Hash for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: Hash, AlphaComponentType: 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> Mul<T> for GrayAlpha<T>

where T: Copy + Mul<Output = T>,

px * 1

type Output = GrayAlpha<T>

The resulting type after applying the * operator.

fn mul(self, r: T) -> <GrayAlpha<T> as Mul<T>>::Output

Performs the * operation.

impl<T> MulAssign<T> for GrayAlpha<T>

where T: Copy + Mul<Output = T>,

px * 1

fn mul_assign(&mut self, r: T)

Performs the *= operation.

impl<ComponentType, AlphaComponentType> Ord for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: Ord, AlphaComponentType: Ord,

fn cmp(&self, other: &GrayAlpha<ComponentType, AlphaComponentType>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl<ComponentType, AlphaComponentType> PartialEq for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: PartialEq, AlphaComponentType: PartialEq,

fn eq(&self, other: &GrayAlpha<ComponentType, AlphaComponentType>) -> bool

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

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

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

impl<ComponentType, AlphaComponentType> PartialOrd for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: PartialOrd, AlphaComponentType: PartialOrd,

fn partial_cmp( &self, other: &GrayAlpha<ComponentType, AlphaComponentType> ) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T> Sub<T> for GrayAlpha<T>

where T: Copy + Sub<Output = T>,

px - 1

type Output = GrayAlpha<<T as Sub>::Output>

The resulting type after applying the - operator.

fn sub(self, r: T) -> <GrayAlpha<T> as Sub<T>>::Output

Performs the - operation.

impl<T, A> Sub for GrayAlpha<T, A>

where T: Sub, A: Sub,

px - px

type Output = GrayAlpha<<T as Sub>::Output, <A as Sub>::Output>

The resulting type after applying the - operator.

fn sub(self, other: GrayAlpha<T, A>) -> <GrayAlpha<T, A> as Sub>::Output

Performs the - operation.

impl<T> SubAssign<T> for GrayAlpha<T>

where T: Copy + Sub<Output = T>,

px - 1

fn sub_assign(&mut self, r: T)

Performs the -= operation.

impl<T, A> SubAssign for GrayAlpha<T, A>

where T: Sub<Output = T> + Copy, A: Sub<Output = A> + Copy,

px - px

fn sub_assign(&mut self, other: GrayAlpha<T, A>)

Performs the -= operation.

impl<T, A> Sum for GrayAlpha<T, A>

where T: Default + Add<Output = T>, A: Default + Add<Output = A>,

fn sum<I>(iter: I) -> GrayAlpha<T, A>

where I: Iterator<Item = GrayAlpha<T, A>>,

Method which takes an iterator and generates Self from the elements by “summing up” the items.

impl<T, A> Zeroable for GrayAlpha<T, A>

where T: Zeroable, A: Zeroable,

fn zeroed() -> Self

Calls zeroed.

impl<ComponentType, AlphaComponentType> Copy for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: Copy, AlphaComponentType: Copy,

impl<ComponentType, AlphaComponentType> Eq for GrayAlpha<ComponentType, AlphaComponentType>

where ComponentType: Eq, AlphaComponentType: Eq,

impl<T, A> Pod for GrayAlpha<T, A>

where T: Pod, A: Pod,

impl<ComponentType, AlphaComponentType> StructuralEq for GrayAlpha<ComponentType, AlphaComponentType>

impl<ComponentType, AlphaComponentType> StructuralPartialEq for GrayAlpha<ComponentType, AlphaComponentType>