2.2.7.1.8 Glyph Cache Capability Set (TS_GLYPHCACHE_CAPABILITYSET)

 The TS_GLYPHCACHE_CAPABILITYSET structure advertises the glyph support level and associated cache sizes. This capability is only sent from client to server.


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capabilitySetType

lengthCapability

GlyphCache (40 bytes)

...

...

FragCache

GlyphSupportLevel

pad2octets

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

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.

GlyphCache (40 bytes): An array of 10 TS_CACHE_DEFINITION structures. An ordered specification of the layout of each of the glyph caches with IDs 0 through to 9 ([MS-RDPEGDI] section 3.1.1.1.2).

FragCache (4 bytes): Fragment cache data. The maximum number of entries allowed in the cache is 256, and the largest allowed maximum size of an element is 256 bytes.

GlyphSupportLevel (2 bytes): A 16-bit, unsigned integer. The level of glyph support.

Value

Meaning

GLYPH_SUPPORT_NONE

0x0000

The client does not support glyph caching. All text output will be sent to the client as expensive Bitmap Updates (sections 2.2.9.1.1.3.1.2 and 2.2.9.1.2.1.2).

GLYPH_SUPPORT_PARTIAL

0x0001

Indicates support for Revision 1 Cache Glyph Secondary Drawing Orders ([MS-RDPEGDI] section 2.2.2.2.1.2.5).

GLYPH_SUPPORT_FULL

0x0002

Indicates support for Revision 1 Cache Glyph Secondary Drawing Orders ([MS-RDPEGDI] section 2.2.2.2.1.2.5).

GLYPH_SUPPORT_ENCODE

0x0003

Indicates support for Revision 2 Cache Glyph Secondary Drawing Orders ([MS-RDPEGDI] section 2.2.2.2.1.2.6).

If the GlyphSupportLevel is greater than GLYPH_SUPPORT_NONE (0), the client MUST support the GlyphIndex Primary Drawing Order ([MS-RDPEGDI] section 2.2.2.2.1.1.2.13) or the FastIndex Primary Drawing Order ([MS-RDPEGDI] section 2.2.2.2.1.1.2.14). If the FastIndex Primary Drawing Order is not supported, then support for the GlyphIndex Primary Drawing Order is assumed by the server (order support is specified in the Order Capability Set, as described in section 2.2.7.1.3).

pad2octets (2 bytes): A 16-bit, unsigned integer. Padding. Values in this field MUST be ignored.

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