2.2.2.2 Fast-Path Orders Update (TS_FP_UPDATE_ORDERS)

The TS_FP_UPDATE_ORDERS structure contains primary, secondary, and alternate secondary drawing orders aligned on byte boundaries. This structure conforms to the layout of a Fast-Path Update (see [MS-RDPBCGR] section 2.2.9.1.2.1) and is encapsulated within a Fast-Path Update PDU (see [MS-RDPBCGR] section 2.2.9.1.2.1.1).

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
updateHeader								compressionFlags (optional)								size
numberOrders																orderData (variable)
...

updateHeader (1 byte): An 8-bit, unsigned integer. The format of this field is the same as the updateHeader byte field described in the Fast-Path Update structure (see [MS-RDPBCGR] section 2.2.9.1.2.1). The updateCode bitfield (4 bits in size) MUST be set to FASTPATH_UPDATETYPE_ORDERS (0x0).

compressionFlags (1 byte): An 8-bit, unsigned integer. The format of this optional field (as well as the possible values) is the same as the compressionFlags field described in the Fast-Path Update structure specified in [MS-RDPBCGR] section 2.2.9.1.2.1.

size (2 bytes): A 16-bit, unsigned integer. The format of this field (as well as the possible values) is the same as the size field described in the Fast-Path Update structure specified in [MS-RDPBCGR] section 2.2.9.1.2.1.

numberOrders (2 bytes): A 16-bit, unsigned integer. The number of Drawing Order (section 2.2.2.1.1) structures contained in the orderData field.

orderData (variable): A variable-sized array of Drawing Order (section 2.2.2.1.1) structures packed on byte boundaries. Each structure contains a primary, secondary, or alternate secondary drawing order. The controlFlags field of the Drawing Order identifies the type of drawing order.