Base class for Portable Map file formats (or Portable AnyMaps or PNM).

public TPortableMapFileFormat = class(TImageFileFormat);

ImagingPortableMaps (at line 64)

There are several types of PNM file formats that share common (simple) structure. This class can actually load all supported PNM formats. Saving is also done by this class but descendants (each for different PNM format) control it.

TObject
TImageFileFormat
TPortableMapFileFormat
TPAMFileFormat, TPBMFileFormat, TPFMFileFormat, TPGMFileFormat, TPPMFileFormat