Module png::chunk

Chunk types and functions

Structs

• ChunkType

Constants

• IDAT
  Image data
• IEND
  Image trailer
• IHDR
  Image header
• PLTE
  Palette
• acTL
  Animation control
• bKGD
  Background colour
• cHRM
  Source system’s pixel chromaticities
• cICP
  Coding-independent code points for video signal type identification chunk
• cLLI
  Content Light Level Information chunk
• eXIf
  EXIF metadata chunk
• fcTL
  Frame control
• fdAT
  Frame data
• gAMA
  Source system’s gamma value
• iCCP
  ICC profile chunk
• iTXt
  UTF-8 textual data
• mDCV
  Mastering Display Color Volume chunk
• pHYs
  Physical pixel dimensions
• sBIT
• sRGB
  sRGB color space chunk
• tEXt
  Latin-1 uncompressed textual data
• tIME
  Image last-modification time
• tRNS
  Transparency
• zTXt
  Latin-1 compressed textual data

Functions

• 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.