2.2.1.1 Color Table Cache Capability Set (TS_COLORTABLE_CAPABILITYSET)
The TS_COLORTABLE_CAPABILITYSET structure is an unused capability set that advertises the size of the color table cache used in conjunction with the Cache Color Table Secondary Drawing Order (see section 2.2.2.2.1.2.4) and is based on the capability set in [T128] section 8.2.8. This capability is sent by both client and server.
Instead of being specified by the Color Table Cache Capability Set, the existence of color table caching is tied to support for the MemBlt (section 2.2.2.2.1.1.2.9) and Mem3Blt (section 2.2.2.2.1.1.2.10) Primary Drawing orders. If support for these orders is advertised in the Order Capability Set (see [MS-RDPBCGR] section 2.2.7.1.3), the existence of a color table cache with entries for six palettes is implied when palettized color is being used.
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capabilitySetType |
lengthCapability |
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colorTableCacheSize |
pad2octets |
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capabilitySetType (2 bytes): A 16-bit, unsigned integer. The type of the capability set. This field MUST be set to CAPSTYPE_COLORCACHE (0x000A).
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.
colorTableCacheSize (2 bytes): A 16-bit, unsigned integer. The number of entries in the color table cache (each entry stores a color table). This value MUST be ignored during capability exchange and is assumed to be 0x0006.
pad2octets (2 bytes): A 16-bit, unsigned integer used as padding. Values in this field are arbitrary and MUST be ignored.