Module image::codecs::pnm

Decoding of netpbm image formats (pbm, pgm, ppm and pam).

The formats pbm, pgm and ppm are fully supported. The pam decoder recognizes the tuple types BLACKANDWHITE, GRAYSCALE and RGB and explicitly recognizes but rejects their _ALPHA variants for now as alpha color types are unsupported.

Structs

• ArbitraryHeader
  Header produced by a pam file (“Portable Arbitrary Map”)
• BitmapHeader
  Header produced by a pbm file (“Portable Bit Map”)
• GraymapHeader
  Header produced by a pgm file (“Portable Gray Map”)
• PixmapHeader
  Header produced by a ppm file (“Portable Pixel Map”)
• PnmDecoder
  PNM decoder
• PnmEncoder
  Encodes images to any of the pnm image formats.
• PnmHeader
  Stores the complete header data of a file.

Enums

• ArbitraryTuplType
  Standardized tuple type specifiers in the header of a pam.
• PnmSubtype
  Denotes the category of the magic number
• SampleEncoding
  The kind of encoding used to store sample values