Struct lodepng::ffi::CompressSettings

#[repr(C)]
pub struct CompressSettings {
    pub windowsize: u32,
    pub minmatch: u16,
    pub nicematch: u16,
    pub btype: u8,
    pub use_lz77: bool,
    pub lazymatching: bool,
    pub custom_zlib: custom_compress_callback,
    pub custom_deflate: custom_compress_callback,
    pub custom_context: *const c_void,
}

Settings for zlib compression. Tweaking these settings tweaks the balance between speed and compression ratio.

Fields

windowsize: u32

👎Deprecated

Obsolete. No-op.

minmatch: u16

👎Deprecated

Compression level 1 (fast) to 9 (best). Use set_level() instead.

nicematch: u16

👎Deprecated

Obsolete. No-op.

btype: u8

👎Deprecated

Obsolete. No-op.

use_lz77: bool

👎Deprecated

If false, it won’t compress at all. Use set_level(0)

lazymatching: bool

👎Deprecated

Obsolete. No-op.

custom_zlib: custom_compress_callback

👎Deprecated: use features of the flate2 crate instead

use custom zlib encoder instead of built in one (default: None).

You should configure the flate2 crate to use another zlib instead. This option will cause unnecessary buffering.

custom_deflate: custom_compress_callback

👎Deprecated: use features of the flate2 crate instead

use custom deflate encoder instead of built in one (default: null) if custom_zlib is used, custom_deflate is ignored since only the built in zlib function will call custom_deflate

You should configure the flate2 crate to use another zlib instead. This option will cause unnecessary buffering.

custom_context: *const c_void

optional custom settings for custom functions

Implementations

impl CompressSettings

pub fn set_level(&mut self, level: u8)

0 (none), 1 (fast) to 9 (best)

pub fn level(&self) -> u8

zlib compression level

impl CompressSettings

pub fn new() -> CompressSettings

Default compression settings

Trait Implementations

impl Clone for CompressSettings

fn clone(&self) -> CompressSettings

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CompressSettings

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

Formats the value using the given formatter.

impl Default for CompressSettings

fn default() -> Self

Returns the “default value” for a type.

impl Send for CompressSettings

impl Sync for CompressSettings