3.3.5.1.1.1.15 Construction of FastGlyph
The structure and fields of the FastGlyph Primary Drawing Order are specified in section 2.2.2.2.1.1.2.15. The order fields MUST be populated in accordance with this description and the instructions detailed in section 3.3.5.1.1.1.
All of the glyphs associated with the glyph cache indices specified in the order MUST be sent to the client before this order is dispatched by using a Revision 1 or 2 Cache Glyph Secondary Drawing Order (see sections 2.2.2.2.1.2.2 and 2.2.2.2.1.2.3) or a prior FastGlyph Primary Drawing Order. The usage of glyph cache indices implies that support for glyph caching MUST have been specified in the Glyph Cache Capability Set (see [MS-RDPBCGR] section 2.2.7.1.8).
The FastGlyph Order MUST NOT be sent to the client if support for it was not specified in the Order Capability Set (see [MS-RDPBCGR] section 2.2.7.1.3).