2.2.7.1.4.1 Revision 1 (TS_BITMAPCACHE_CAPABILITYSET)

The TS_BITMAPCACHE_CAPABILITYSET structure is used to advertise support for Revision 1 bitmap caches ([MS-RDPEGDI] section 3.1.1.1.1). This capability is only sent from client to server.

In addition to specifying bitmap caching parameters in the Revision 1 Bitmap Cache Capability Set, a client MUST also support the MemBlt and Mem3Blt Primary Drawing Orders ([MS-RDPEGDI] sections 2.2.2.2.1.1.2.9 and 2.2.2.2.1.1.2.10, respectively) in order to receive the Cache Bitmap (Revision 1) Secondary Drawing Order ([MS-RDPEGDI] section 2.2.2.2.1.2.2).


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capabilitySetType

lengthCapability

pad1

pad2

pad3

pad4

pad5

pad6

Cache0Entries

Cache0MaximumCellSize

Cache1Entries

Cache1MaximumCellSize

Cache2Entries

Cache2MaximumCellSize

capabilitySetType (2 bytes): A 16-bit, unsigned integer. The type of the capability set. This field MUST be set to CAPSTYPE_BITMAPCACHE (4).

lengthCapability (2 bytes):  A 16-bit, unsigned integer. The length in bytes of the capability data, including the size of the capabilitySetType and lengthCapability fields.

pad1 (4 bytes): A 32-bit, unsigned integer. Padding. Values in this field MUST be ignored.

pad2 (4 bytes): A 32-bit, unsigned integer. Padding. Values in this field MUST be ignored.

pad3 (4 bytes): A 32-bit, unsigned integer. Padding. Values in this field MUST be ignored.

pad4 (4 bytes): A 32-bit, unsigned integer. Padding. Values in this field MUST be ignored.

pad5 (4 bytes): A 32-bit, unsigned integer. Padding. Values in this field MUST be ignored.

pad6 (4 bytes): A 32-bit, unsigned integer. Padding. Values in this field MUST be ignored.

Cache0Entries (2 bytes): A 16-bit, unsigned integer. The number of entries in Bitmap Cache 0 (maximum allowed value is 200 entries).

Cache0MaximumCellSize (2 bytes): A 16-bit, unsigned integer. The maximum cell size in Bitmap Cache 0.

Cache1Entries (2 bytes): A 16-bit, unsigned integer. The number of entries in Bitmap Cache 1 (maximum allowed value is 600 entries).

Cache1MaximumCellSize (2 bytes): A 16-bit, unsigned integer. The maximum cell size in Bitmap Cache 1.

Cache2Entries (2 bytes): A 16-bit, unsigned integer. The number of entries in Bitmap Cache 2 (maximum allowed value is 65535 entries).

Cache2MaximumCellSize (2 bytes): A 16-bit, unsigned integer. The maximum cell size in Bitmap Cache 2.

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