2.2.7.1.9 Offscreen Bitmap Cache Capability Set (TS_OFFSCREEN_CAPABILITYSET)
The TS_OFFSCREEN_CAPABILITYSET structure is used to advertise support for offscreen bitmap caching ([MS-RDPEGDI] section 3.1.1.1.5). This capability is only sent from client to server.
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capabilitySetType |
lengthCapability |
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offscreenSupportLevel |
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offscreenCacheSize |
offscreenCacheEntries |
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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_OFFSCREENCACHE (17).
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.
offscreenSupportLevel (4 bytes): A 32-bit, unsigned integer. Offscreen bitmap cache support level.
-
Value
Meaning
FALSE
0x00000000
Offscreen bitmap cache is not supported.
TRUE
0x00000001
Offscreen bitmap cache is supported.
offscreenCacheSize (2 bytes): A 16-bit, unsigned integer. The maximum size, in kilobytes, of the client-side offscreen bitmap cache.
offscreenCacheEntries (2 bytes): A 16-bit, unsigned integer. The maximum number of cache entries allowed in the client-side offscreen bitmap cache.