Enum png::Compression

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pub enum Compression {
    Default,
    Fast,
    Best,
    Huffman,
    Rle,
}
Expand description

The type and strength of applied compression.

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Default

Default level

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Fast

Fast minimal compression

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Best

Higher compression level

Best in this context isn’t actually the highest possible level the encoder can do, but is meant to emulate the Best setting in the Flate2 library.

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Huffman

👎Deprecated since 0.17.6: use one of the other compression levels instead, such as ‘fast’
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Rle

👎Deprecated since 0.17.6: use one of the other compression levels instead, such as ‘fast’

Implementations§

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impl Compression

Mod to encapsulate the converters depending on the deflate crate.

Since this only contains trait impls, there is no need to make this public, they are simply available when the mod is compiled as well.

Trait Implementations§

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impl Clone for Compression

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fn clone(&self) -> Compression

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 Compression

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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 Compression

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fn default() -> Self

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

Auto Trait Implementations§

Blanket Implementations§

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.