Struct lodepng::GreyAlpha

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

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

Methods

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 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
    A: Clone,
    T: Copy, 

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

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

Performs the conversion.

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

Assumes 65535 is opaque

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

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

Performs the conversion.

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

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

fn as_ref(&self) -> &T

Performs the conversion.

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

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

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

Feeds a slice of this type into the given [Hasher].

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

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

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: &GrayAlpha<ComponentType, AlphaComponentType>) -> bool

This method tests for !=.

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

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

Returns the "default value" for a type.

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

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

Formats the value using the given formatter.

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

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

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: &GrayAlpha<ComponentType, AlphaComponentType>) -> bool

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

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.

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

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

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> ComponentSlice<T> for GrayAlpha<T, 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]