Enum png::decoder::InterlaceInfo

pub enum InterlaceInfo {
    Null,
    Adam7 {
        pass: u8,
        line: u32,
        width: u32,
    },
}

PNG (2003) specifies two interlace modes, but reserves future extensions.

Variants

Null

the null method means no interlacing

Adam7

Fields

pass: u8

line: u32

width: u32

Adam7 derives its name from doing 7 passes over the image, only decoding a subset of all pixels in each pass. The following table shows pictorially what parts of each 8x8 area of the image is found in each pass:

1 6 4 6 2 6 4 6 7 7 7 7 7 7 7 7 5 6 5 6 5 6 5 6 7 7 7 7 7 7 7 7 3 6 4 6 3 6 4 6 7 7 7 7 7 7 7 7 5 6 5 6 5 6 5 6 7 7 7 7 7 7 7 7

Trait Implementations

impl Clone for InterlaceInfo

fn clone(&self) -> InterlaceInfo

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for InterlaceInfo

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

Formats the value using the given formatter.

impl Copy for InterlaceInfo