Module png::chunk [−] [src]

Chunk types and functions

Constants

IDAT	Image data
IEND	Image trailer
IHDR	Image header
PLTE	Palette
acTL	Animation control
bKGD	Background colour
fcTL	Frame control
fdAT	Frame data
pHYs	Physical pixel dimensions
tIME	Image last-modification time
tRNS	Transparency

is_critical	Returns true if the chunk is critical.
is_private	Returns true if the chunk is private.
reserved_set	Checks whether the reserved bit of the chunk name is set. If it is set the chunk name is invalid.
safe_to_copy	Returns true if the chunk is safe to copy if unknown.