PNGChunks::PNGChunk
Inherits Reference < Object
PNGChunk represents a single PNG chunk, which is effectively the pair of the type (such as IHDR) and the data.
Constructors
new(type_bytes : Slice(UInt8), data : Slice(UInt8))
Creates a new PNGChunk out of a type and data, both Bytes.
type_bytes = "IHDR".bytes
data = make_ihdr_bytes
chunk = PNGChunks::PNGChunk(type_bytes, data)Instance methods
crc
The chunk's CRC32 checksum, calculated from the chunk's type and data.
data
The chunk's data.
type
The chunk's type as a string.
type_bytes
The chunk's type as Bytes. For example, IHDR is Bytes[0x49, 0x48, 0x44, 0x52].
valid?
A boolean representing whether the chunk is valid.
A chunk is valid if its type is made up of ASCII letters (A-Z and a-z) and if its data will fit in a PNG's maximum chunk size.