Struct `ZlibEncoder`

struct ZlibEncoder<W: Write> { ... }

A Zlib encoder powered by the Zopfli algorithm, that compresses data using a DeflateEncoder. Most users will find using compress easier and more performant.

The caveats about short writes in DeflateEncoders carry over to ZlibEncoders: for best performance and compression, it is best to avoid them. One way to ensure this is to use the new_buffered method.

Implementations

`impl<W: Write> ZlibEncoder<W>`

fn new(options: Options, btype: BlockType, sink: W) -> Result<Self, Error>

Creates a new Zlib encoder that will operate according to the specified options.

fn new_buffered(options: Options, btype: BlockType, sink: W) -> Result<BufWriter<Self>, Error>

Creates a new Zlib encoder that operates according to the specified options and is wrapped with a buffer to guarantee that data is compressed in large chunks, which is necessary for decent performance and good compression ratio.

fn finish(self: Self) -> Result<W, Error>

Encodes any pending chunks of data and writes them to the sink, consuming the encoder and returning the wrapped sink. The sink will have received a complete Zlib stream when this method returns.

The encoder is automatically finished when dropped, but explicitly finishing it with this method allows handling I/O errors.

fn get_ref(self: &Self) -> &W

Gets a reference to the underlying writer.

fn get_mut(self: &mut Self) -> &mut W

Gets a mutable reference to the underlying writer.

Note that mutating the output/input state of the stream may corrupt this object, so care must be taken when using this method.

`impl<T> Any for ZlibEncoder<W>`

fn type_id(self: &Self) -> TypeId

`impl<T> Borrow for ZlibEncoder<W>`

fn borrow(self: &Self) -> &T

`impl<T> BorrowMut for ZlibEncoder<W>`

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

`impl<T> From for ZlibEncoder<W>`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T, U> Into for ZlibEncoder<W>`

fn into(self: Self) -> U

Calls U::from(self).

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

`impl<T, U> TryFrom for ZlibEncoder<W>`

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

`impl<T, U> TryInto for ZlibEncoder<W>`

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

`impl<W> Freeze for ZlibEncoder<W>`

`impl<W> RefUnwindSafe for ZlibEncoder<W>`

`impl<W> Send for ZlibEncoder<W>`

`impl<W> Sync for ZlibEncoder<W>`

`impl<W> Unpin for ZlibEncoder<W>`

`impl<W> UnsafeUnpin for ZlibEncoder<W>`

`impl<W> UnwindSafe for ZlibEncoder<W>`

`impl<W: Write> Drop for ZlibEncoder<W>`

fn drop(self: &mut Self)

`impl<W: Write> Write for ZlibEncoder<W>`

fn write(self: &mut Self, buf: &[u8]) -> Result<usize, Error>
fn flush(self: &mut Self) -> Result<(), Error>

`impl<W: crate::io::Write> Write for ZlibEncoder<W>`

fn write(self: &mut Self, _buf: &[u8]) -> Result<usize>
fn flush(self: &mut Self) -> Result<()>