PCX was the native file format for ZSoft PC Paintbrush graphics editor which was popular in old DOS days. Most PCX files use a color palette, but the format has also been extended to support true color images. It uses a simple run-length encoding as compression. PCX was quite popular on early DOS and Windows systems (it is native texture file format of Unreal 1 engine) but it has been largely replaced by more powerful formats like PNG and JPEG. Imaging supports only loading of PCX files (I don't wont this venerable format to spread).

Format	TImageFormat equivalent	1 bit mono	ifIndex8	2 bit indexed	ifIndex8	4 bit indexed (rare)	ifIndex8	8 bit indexed	ifIndex8	24 bit RGB	ifR8G8B8	32 bit ARGB (rare)	ifA8R8G8B8