3.2.5.1.1.1.4 Processing of MultiPatBlt
The structure and fields of the MultiPatBlt Primary Drawing Order are specified in section 2.2.2.2.1.1.2.4, and the techniques described in section 3.2.5.1.1.1 demonstrate how to decode and process the order.
If a cached brush is specified in this order, that brush MUST have been received by the client in a prior Cache Brush Secondary Drawing Order (see section 3.2.5.1.2.1.6). If this is not the case, the client SHOULD ignore this order. Furthermore, if support for brush caching was not specified in the Brush Capability Set (see [MS-RDPBCGR] section 2.2.7.1.7), and a cached brush is included in the MultiPatBlt order, the client SHOULD ignore this order.