`TFPReaderGif`
	ro	Header
	ro	Descriptor
	ro	GraphCtrlExt
	ro	GraphicsCtrlExt
	ro	Transparent
	ro	Palette
	ro	Width
	ro	Height
	ro	Interlace
	ro	BitsPerPixel
	ro	Background
	ro	Resolution

`TFPCustomImageReader`
		DefaultImageClass

`TFPCustomImageHandler`
pt	ro	TheStream
pt	ro	TheImage