Enum image::codecs::png::FilterType

source · [−]

#[non_exhaustive]
pub enum FilterType {
    NoFilter,
    Sub,
    Up,
    Avg,
    Paeth,
    Adaptive,
}

Expand description

Filter algorithms used to process image data to improve compression.

The default filter is Adaptive.

Variants (Non-exhaustive)

This enum is marked as non-exhaustive

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

`NoFilter`

No processing done, best used for low bit depth grayscale or data with a low color count

`Sub`

Filters based on previous pixel in the same scanline

`Up`

Filters based on the scanline above

`Avg`

Filters based on the average of left and right neighbor pixels

`Paeth`

Algorithm that takes into account the left, upper left, and above pixels

`Adaptive`

Uses a heuristic to select one of the preceding filters for each scanline rather than one filter for the entire image

Trait Implementations

source

impl Clone for FilterType

source

fn clone(&self) -> FilterType

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

source

impl Debug for FilterType

source

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

Formats the value using the given formatter. Read more

source

impl Default for FilterType

source

fn default() -> Self

Returns the “default value” for a type. Read more

source

impl PartialEq<FilterType> for FilterType

source

fn eq(&self, other: &FilterType) -> bool

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

1.0.0 · source

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

This method tests for !=.

source

impl StructuralPartialEq for FilterType

Auto Trait Implementations

impl RefUnwindSafe for FilterType

impl Send for FilterType

impl Sync for FilterType

impl Unpin for FilterType

impl UnwindSafe for FilterType

Blanket Implementations

source

impl<T> Any for T where
T: 'static + ?Sized,

source

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

source

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

source

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

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

Mutably borrows from an owned value. Read more

source

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

source

impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::()

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

source

impl<R, P> ReadPrimitive<R> for P where
R: Read + ReadEndian,
P: Default,

source

fn read_from_little_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_little_endian().

source

fn read_from_big_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_big_endian().

source

fn read_from_native_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_native_endian().

source

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

source

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

source

fn clone_into(&self, target: &mut T)

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

Uses borrowed data to replace owned data, usually by cloning. Read more

source

impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

source

impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Enum image::codecs::png::FilterType

Variants (Non-exhaustive)

NoFilter

Sub

Up

Avg

Paeth

Adaptive

Trait Implementations

impl Clone for FilterType

fn clone(&self) -> FilterType

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

impl Debug for FilterType

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

impl Default for FilterType

fn default() -> Self

impl PartialEq<FilterType> for FilterType

fn eq(&self, other: &FilterType) -> bool

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

impl Copy for FilterType

impl Eq for FilterType

impl StructuralEq for FilterType

impl StructuralPartialEq for FilterType

Auto Trait Implementations

impl RefUnwindSafe for FilterType

impl Send for FilterType

impl Sync for FilterType

impl Unpin for FilterType

impl UnwindSafe for FilterType

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::()

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<R, P> ReadPrimitive<R> for P where R: Read + ReadEndian<P>, P: Default,

fn read_from_little_endian(read: &mut R) -> Result<Self, Error>

fn read_from_big_endian(read: &mut R) -> Result<Self, Error>

fn read_from_native_endian(read: &mut R) -> Result<Self, Error>

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

`NoFilter`

`Sub`

`Up`

`Avg`

`Paeth`

`Adaptive`

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<R, P> ReadPrimitive<R> for P where
R: Read + ReadEndian<P>,
P: Default,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,