Enum image::codecs::png::CompressionType

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#[non_exhaustive]
pub enum CompressionType {
    Default,
    Fast,
    Best,
    Huffman,
    Rle,
}

Expand description

Compression level of a PNG encoder. The default setting is Fast.

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.

`Default`

Default compression level

`Fast`

Fast, minimal compression

`Best`

High compression level

`Huffman`

👎Deprecated: use one of the other compression levels instead, such as ‘Fast’

Huffman coding compression

`Rle`

👎Deprecated: use one of the other compression levels instead, such as ‘Fast’

Run-length encoding compression

Trait Implementations

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impl Clone for CompressionType

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fn clone(&self) -> CompressionType

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for CompressionType

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

Formats the value using the given formatter. Read more

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impl Default for CompressionType

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fn default() -> Self

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

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impl PartialEq<CompressionType> for CompressionType

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

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

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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. Read more

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impl StructuralPartialEq for CompressionType

Auto Trait Implementations

impl RefUnwindSafe for CompressionType

impl Send for CompressionType

impl Sync for CompressionType

impl Unpin for CompressionType

impl UnwindSafe for CompressionType

Blanket Implementations

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for Twhere
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::<T>()

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

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

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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().

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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().

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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().

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impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

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

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

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

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impl<T, U> TryFrom for Twhere
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.

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impl<T, U> TryInto for Twhere
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::CompressionType

Variants (Non-exhaustive)

Default

Fast

Best

Huffman

Rle

Trait Implementations

impl Clone for CompressionType

fn clone(&self) -> CompressionType

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

impl Debug for CompressionType

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

impl Default for CompressionType

fn default() -> Self

impl PartialEq<CompressionType> for CompressionType

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

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

impl Copy for CompressionType

impl Eq for CompressionType

impl StructuralEq for CompressionType

impl StructuralPartialEq for CompressionType

Auto Trait Implementations

impl RefUnwindSafe for CompressionType

impl Send for CompressionType

impl Sync for CompressionType

impl Unpin for CompressionType

impl UnwindSafe for CompressionType

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere 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 Twhere U: From<T>,

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

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 Pwhere 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 Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

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

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

`Default`

`Fast`

`Best`

`Huffman`

`Rle`

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

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

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

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

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

impl<T> ToOwned for Twhere
T: Clone,

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

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