Represents the "FontFile" entry of the font descriptor object.

It is an optional entry defined as part of the PDF 1.0 specification.

It contains an EmbeddedFontStreamElement.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 122, page 283.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 120, page 342.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 124, page 285.

FontFile holds a Type 1 font program. The stream body contains the three sections of a Type 1 font binary: the clear-text section, the encrypted section, and the fixed-content section. The lengths of these sections are given by Length1, Length2, and Length3 in the stream dictionary.