diff options
Diffstat (limited to 'x11/dxpc/pkg')
-rw-r--r-- | x11/dxpc/pkg/DESCR | 50 | ||||
-rw-r--r-- | x11/dxpc/pkg/PLIST | 3 |
2 files changed, 0 insertions, 53 deletions
diff --git a/x11/dxpc/pkg/DESCR b/x11/dxpc/pkg/DESCR deleted file mode 100644 index deb4b412d47..00000000000 --- a/x11/dxpc/pkg/DESCR +++ /dev/null @@ -1,50 +0,0 @@ -dxpc is an X protocol compressor designed to improve the -speed of X11 applications run over low-bandwidth links -(such as dialup PPP connections). - -dxpc consists of two processes: -1. a Client Proxy that runs on the "remote" machine (the machine where - the X clients are running) -2. a Server Proxy that runs on the "local" machine (the machine where - the X server is running) - -(Starting in the dxpc-3.0, release, the Client Proxy and Server Proxy -are instances of the same program, called "dxpc"; command-line arguments -tell the program whether it is acting as a Client Proxy or a Server Proxy.) - -The Client Proxy mimics an X server. X client applications connect -to the Client Proxy using display "unix:8" (or "<hostname>:8"; dxpc -supports both UNIX domain and TCP sockets). The Client Proxy receives -X requests from the application, compresses them, and sends them to -the Server Proxy. The Server Proxy uncompresses the requests and -sends them to the real X server. Similarly, the Server Proxy receives -X events, replies, and errors from the real X server. It compresses -these messages and sends them to the Client Proxy, which uncompresses -them and sends them to the client application. - -dxpc attempts to exploit patterns in X protocol messages to limit -the amount of data sent between the Client Proxy and Server Proxy. -For many X message types, each field has a high probability of having -the same value as it had in some previous message of the the same type. -For such fields, dxpc maintains caches of the last 'n' values, with a -least-recently-used replacement policy. If a field value in a new -message is already present in the corresponding cache, dxpc transmits -the value's index within the cache rather than the value itself. -Because the number of bits needed to represent this index is typically -much smaller than the number of bits needed to represent the value -itself, transmission of cache indices typically results in a -significant reduction in the number of bytes transmitted over -the low-bandwidth link. - -In other cases, the value of a field in an X message may differ from -that field's value in the last message of the same type by a small -value. Some X messages contain sequence numbers or timestamps that -have this property. X requests that create new objects also tend -to have this property; in a "Create Window" request, for example, -the value of the "Window ID" being created is typically equal to -"(Window ID of the last window created) + (some small positive integer)." -For fields like these, dxpc transmits the difference between the field -value in the new message and the value of the corresponding field in -the previous message of the same type. This value usually is a -small number that can be encoded in far fewer bits than the actual -field value. diff --git a/x11/dxpc/pkg/PLIST b/x11/dxpc/pkg/PLIST deleted file mode 100644 index e579dd79a6c..00000000000 --- a/x11/dxpc/pkg/PLIST +++ /dev/null @@ -1,3 +0,0 @@ -@comment $NetBSD: PLIST,v 1.1 1998/01/29 13:36:22 frueauf Exp $ -bin/dxpc -man/man1/dxpc.1 |