Enum BlockType

pub enum BlockType {
    Uncompressed,
    Fixed,
    Dynamic,
}

The type of data blocks to generate for a DEFLATE stream.

Variants

Uncompressed

Non-compressed blocks (BTYPE=00).

The input data will be divided into chunks up to 64 KiB big and stored in the DEFLATE stream without compression. This is mainly useful for test and development purposes.

Fixed

Compressed blocks with fixed Huffman codes (BTYPE=01).

The input data will be compressed into DEFLATE blocks using a fixed Huffman tree defined in the DEFLATE specification. This provides fast but poor compression, as the Zopfli algorithm is not actually used.

Dynamic

Select the most space-efficient block types for the input data. This is the recommended type for the vast majority of Zopfli applications.

This mode lets the Zopfli algorithm choose the combination of block types that minimizes data size. The emitted block types may be Uncompressed or Fixed, in addition to compressed with dynamic Huffman codes (BTYPE=10).

Trait Implementations

impl Clone for BlockType

fn clone(&self) -> BlockType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BlockType

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

Formats the value using the given formatter.

impl Default for BlockType

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for BlockType

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BlockType

impl Eq for BlockType

impl StructuralPartialEq for BlockType