Struct lodepng::GreyAlpha

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

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

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

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

Trait Implementations

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

px + px

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

The resulting type after applying the + operator.

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

Performs the + operation.

impl<T> Add<T> for GrayAlpha<T, T> where
    T: Copy + Add<T, Output = T>, 

px + 1

type Output = GrayAlpha<T, T>

The resulting type after applying the + operator.

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

Performs the + operation.

impl<T, A> AddAssign<GrayAlpha<T, A>> for GrayAlpha<T, A> where
    T: Add<T, Output = T> + Copy,
    A: Add<A, Output = A> + Copy, 

px + px

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

Performs the += operation.

impl<T> AddAssign<T> for GrayAlpha<T, T> where
    T: Copy + Add<T, Output = T>, 

px + 1

pub fn add_assign(&mut self, r: T)

Performs the += operation.

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

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

Performs the conversion.

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

pub fn as_ref(&self) -> &T

Performs the conversion.

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T, B> ComponentMap<GrayAlpha<B, B>, T, B> for GrayAlpha<T, T> where
    T: Copy, 

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

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

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

pub 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> Copy for GrayAlpha<ComponentType, AlphaComponentType> where
    ComponentType: Copy,
    AlphaComponentType: Copy, 

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

pub 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, 

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

Returns the "default value" for a type.

impl<T> Div<T> for GrayAlpha<T, T> where
    T: Copy + Div<T, Output = T>, 

px / 1

type Output = GrayAlpha<T, T>

The resulting type after applying the / operator.

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

Performs the / operation.

impl<T> DivAssign<T> for GrayAlpha<T, T> where
    T: Copy + Div<T, Output = T>, 

px * 1

pub fn div_assign(&mut self, r: T)

Performs the /= operation.

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

impl<T> From<Gray<T>> for GrayAlpha<T, u16> where
    T: Copy, 

Assumes 65535 is opaque

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

Performs the conversion.

impl<T> From<Gray<T>> for GrayAlpha<T, u8> where
    T: Copy, 

Assumes 255 is opaque

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

Performs the conversion.

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

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

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

px * 1

type Output = GrayAlpha<T, T>

The resulting type after applying the * operator.

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

Performs the * operation.

impl<T> MulAssign<T> for GrayAlpha<T, T> where
    T: Copy + Mul<T, Output = T>, 

px * 1

pub fn mul_assign(&mut self, r: T)

Performs the *= operation.

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

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

This method returns an Ordering between self and other.

#[must_use]pub fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]pub fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

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

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

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

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

This method tests for !=.

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

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

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

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

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

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

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

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

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

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

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

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>

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

px - px

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

The resulting type after applying the - operator.

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

Performs the - operation.

impl<T> Sub<T> for GrayAlpha<T, T> where
    T: Copy + Sub<T, Output = T>, 

px - 1

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

The resulting type after applying the - operator.

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

Performs the - operation.

impl<T, A> SubAssign<GrayAlpha<T, A>> for GrayAlpha<T, A> where
    T: Sub<T, Output = T> + Copy,
    A: Sub<A, Output = A> + Copy, 

px - px

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

Performs the -= operation.

impl<T> SubAssign<T> for GrayAlpha<T, T> where
    T: Copy + Sub<T, Output = T>, 

px - 1

pub fn sub_assign(&mut self, r: T)

Performs the -= operation.

impl<T, A> Sum<GrayAlpha<T, A>> for GrayAlpha<T, A> where
    T: Default + Add<T, Output = T>,
    A: Default + Add<A, Output = A>, 

pub 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, 

pub fn zeroed() -> Self

Calls zeroed.