3.2.1.1 Primary Drawing Order History

The Primary Drawing Order History store holds information on the fields that have been received in primary drawing orders. There are three pieces of information that MUST be recorded:

• Last primary order type processed.

• Current bounding rectangle.

• Per-order record of the last value received in each field.

These records are updated as each primary drawing order is processed, and are used to efficiently decode and process primary drawing orders received from the server (see section 3.2.5.1.1.1).