Enum lodepng::ffi::FilterStrategy

pub enum FilterStrategy {
    LFS_ZERO,
    LFS_MINSUM,
    LFS_ENTROPY,
    LFS_BRUTE_FORCE,
    LFS_PREDEFINED,
}

automatically use color type with less bits per pixel if losslessly possible. Default: AUTO

Variants

LFS_ZERO	every filter at zero
LFS_MINSUM	Use filter that gives minumum sum, as described in the official PNG filter heuristic.
LFS_ENTROPY	Use the filter type that gives smallest Shannon entropy for this scanline. Depending on the image, this is better or worse than minsum.
LFS_BRUTE_FORCE	Brute-force-search PNG filters by compressing each filter for each scanline. Experimental, very slow, and only rarely gives better compression than MINSUM.
LFS_PREDEFINED	use predefined_filters buffer: you specify the filter type for each scanline

Trait Implementations

Derived Implementations

impl Debug for FilterStrategy

fn fmt(&self, __arg_0: &mut Formatter) -> Result

impl Clone for FilterStrategy

fn clone(&self) -> FilterStrategy

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

impl Copy for FilterStrategy