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display-mansync
Langue: en
Version: 65702 (mandriva - 22/10/07)
Section: 7 (Divers)
NAME
display-mansync : sync mode emulationSYNOPIS
display-mansync
DESCRIPTION
Helper library for the implementation of SYNC mode on targets which are inherently ASYNC (e.g. X) and require manual flushes of the framebuffer.A target wishing to use mansync should open mansync with _ggiAddDL() in it's own GGIopen(). It must pass a pointer to a _ggi_opmansync structure as the argument to _ggiAddDL(), and must define the following macros:
MANSYNC_init(vis) MANSYNC_deinit(vis) MANSYNC_start(vis) MANSYNC_stop(vis) MANSYNC_ignore(vis) MANSYNC_cont(vis)
which is supposed to call the functions in _ggi_opmansync respectively.
Mansync provides the following functions:
int _GGI_mansync_init(vis); int _GGI_mansync_deinit(vis); Initialize/deinitialize mansync for given visual. int _GGI_mansync_start(vis); int _GGI_mansync_stop(vis); Start/stop mansync handling. (process,thread,etc.) You don't need to explicitly call these; MANSYNC_SETFLAGS does it for you. int _GGI_mansync_ignore(vis); int _GGI_mansync_cont(vis); Temporarily start/stop mansync, e.g. during mode set. It is o.k. to use them even if mansync has not been started. MANSYNC_SETFLAGS(vis,flags) mansync management in ggiSetFlags().
(The above functions return 0 if successful, -1 if not.)
Please see display/X, display/aa or display/tile to see how mansync is used. The functions should be transparent enough.
- Important: You're responsible for locking your own visual, not mansync!
ENVIRONMENT VARIABLES
- GGI_MANSYNC_FPS
- This variable specifies the framerate for targets emulating synchronous mode. The default is 20fps. If you are experiencing problems with the X target over relatively slow remote connections it might be due to connection overload. You might want to try with a lower GGI_MANSYNC_FPS setting.
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