Enum png::decoder::stream::U32ValueKind

enum U32ValueKind {
    Signature1stU32,
    Signature2ndU32,
    Length,
    Type {
        length: u32,
    },
    Crc(ChunkType),
    ApngSequenceNumber,
}

Kind of u32 value that is being read via State::U32.

Variants

Signature1stU32

First 4 bytes of the PNG signature - see http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html#PNG-file-signature

Signature2ndU32

Second 4 bytes of the PNG signature - see http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html#PNG-file-signature

Length

Chunk length - see http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html#Chunk-layout

Type

Fields

length: u32

Chunk type - see http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html#Chunk-layout

Crc(ChunkType)

Chunk checksum - see http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html#Chunk-layout

ApngSequenceNumber

Sequence number from an fdAT chunk - see https://wiki.mozilla.org/APNG_Specification#.60fdAT.60:_The_Frame_Data_Chunk

Trait Implementations

impl Debug for U32ValueKind

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

Formats the value using the given formatter.