XmbufQueryExtension, XmbufGetVersion, XmbufCreateBuffers, XmbufDestroyBuffers, XmbufDisplayBuffers,

       This manual page needs more work.

       The  application  programming library for the X11Double-Buffering,Multi-Buffering,andStereoExtension
       contains the interfaces described below.  With the exception of  XmbufQueryExtension,  if  any  of  these
       routines  are called with a display that does not support the extension, the ExtensionErrorHandler (which
       can be set with XSetExtensionErrorHandler and functions the same way as XSetErrorHandler) will be  called
       and the function will then return.

       XmbufQueryExtension  returns  True  if  the  multibuffering/stereo  extension  is  available on the given
       display.  If the extension exists, the value of the first event code (which should be added to the  event
       type  constants  MultibufferClobberNotify and MultibufferUpdateNotify to get the actual values) is stored
       into event_base_return and the value of the first error code (which should be added  to  the  error  type
       constant MultibufferBadBuffer to get the actual value) is stored into error_base_return.

       XmbufGetVersion  gets  the major and minor version numbers of the extension.  The return value is zero if
       an error occurs or non-zero if no error happens.

       XmbufCreateBuffers requests that "count" buffers be created with the given update_action and  update_hint
       and be associated with the indicated window.  The number of buffers created is returned (zero if an error
       occurred) and buffers_update is filled in with that many Multibuffer identifiers.

       XmbufDestroyBuffers destroys the buffers associated with the given window.

       XmbufDisplayBuffers   displays   the   indicated  buffers  their  appropriate  windows  within  max_delay
       milliseconds after min_delay milliseconds have passed.  No two buffers may be associated  with  the  same
       window or else a Match error is generated.

       XmbufGetWindowAttributes gets the multibuffering attributes that apply to all buffers associated with the
       given window.  The list of buffers returns may be freed with XFree.  Returns non-zero on success and zero
       if an error occurs.

       XmbufChangeWindowAttributes  sets the multibuffering attributes that apply to all buffers associated with
       the given window.  This is currently limited to the update_hint.

       XmbufGetBufferAttributes gets the attributes for the indicated buffer.  Returns non-zero on  success  and
       zero if an error occurs.

       XmbufChangeBufferAttributes  sets  the attributes for the indicated buffer.  This is currently limited to
       the event_mask.

       XmbufGetScreenInfo gets the parameters controlling how mono and stereo windows  may  be  created  on  the
       screen  of the given drawable.  The numbers of sets of visual and depths are returned in nmono_return and
       nstereo_return.  If nmono_return is greater than zero, then mono_info_return is set to the address of  an
       array  of  XmbufBufferInfo  structures  describing  the  various  visuals  and  depths  that may be used.
       Otherwise,  mono_info_return  is  set  to  NULL.   Similarly,  stereo_info_return  is  set  according  to
       nstereo_return.   The  storage  returned  in  mono_info_return  and stereo_info_return may be released by
       XFree.  If no errors are encounted, non-zero will be returned.

       XmbufCreateStereoWindow creates a stereo window in the same way that XCreateWindow creates a mono window.
       The buffer ids for the left and right buffers are returned in left_return and right_return, respectively.
       If an extension error handler that returns is installed, None will be returned if the  extension  is  not
       available on this display.

       XmbufQueryExtension,   XmbufGetVersion,   XmbufCreateBuffers,  XmbufDestroyBuffers,  XmbufDisplayBuffers,
       XmbufGetWindowAttributes,             XmbufChangeWindowAttributes,              XmbufGetBufferAttributes,
       XmbufChangeBufferAttributes, XmbufGetScreenInfo, XmbufCreateStereoWindow - X multibuffering functions

       Update_action field:
              MultibufferUpdateActionUndefinedMultibufferUpdateActionBackgroundMultibufferUpdateActionUntouchedMultibufferUpdateActionCopied

       Update_hint field:
              MultibufferUpdateHintFrequentMultibufferUpdateHintIntermittentMultibufferUpdateHintStatic

       Valuemask fields:
              MultibufferWindowUpdateHintMultibufferBufferEventMask

       Mono vs. stereo and left vs. right:
              MultibufferModeMonoMultibufferModeStereoMultibufferSideMonoMultibufferSideLeftMultibufferSideRight

       Clobber state:
              MultibufferUnclobberedMultibufferPartiallyClobberedMultibufferFullyClobbered

       Event stuff:
              MultibufferClobberNotifyMaskMultibufferUpdateNotifyMaskMultibufferClobberNotifyMultibufferUpdateNotifyMultibufferNumberEventsMultibufferBadBufferMultibufferNumberErrors

ExtendingXforDoubleBuffering,Multi-Buffering,andStereo

X Version 11                                      libXext 1.3.4                                         XMBUF(3)

Events:
       typedef struct {
           int type;   /* of event */
           unsigned long serial;       /* # of last request processed by server */
           int send_event;     /* true if this came from a SendEvent request */
           Display *display;   /* Display the event was read from */
           Multibuffer buffer; /* buffer of event */
           int state;  /* see Clobbered constants above */
       } XmbufClobberNotifyEvent;

       typedef struct {
           int type;   /* of event */
           unsigned long serial;       /* # of last request processed by server */
           int send_event;     /* true if this came from a SendEvent request */
           Display *display;   /* Display the event was read from */
           Multibuffer buffer; /* buffer of event */
       } XmbufUpdateNotifyEvent;

       Per-windowattributesthatcanbegot:

       typedef struct {
           int displayed_index;     /* which buffer is being displayed */
           int update_action;  /* Undefined, Background, Untouched, Copied */
           int update_hint;    /* Frequent, Intermittent, Static */
           int window_mode;    /* Mono, Stereo */
           int nbuffers;  /* Number of buffers */
           Multibuffer *buffers;    /* Buffers */
       } XmbufWindowAttributes;

       Per-windowattributesthatcanbeset:

       typedef struct {
           int update_hint;    /* Frequent, Intermittent, Static */
       } XmbufSetWindowAttributes;

       Per-bufferattributesthatcanbegot:

       typedef struct {
           Window window; /* which window this belongs to */
           unsigned long event_mask;     /* events that have been selected */
           int buffer_index;   /* which buffer is this */
           int side; /* Mono, Left, Right */
       } XmbufBufferAttributes;

       Per-bufferattributesthatcanbeset:

       typedef struct {
           unsigned long event_mask;     /* events that have been selected */
       } XmbufSetBufferAttributes;

       Per-screenbufferinfo(therewillbelistsofthem):

       typedef struct {
           VisualID visualid;  /* visual usable at this depth */
           int max_buffers;    /* most buffers for this visual */
           int depth;     /* depth of buffers to be created */
       } XmbufBufferInfo;

       #include <X11/extensions/multibuf.h>

       Bool XmbufQueryExtension(
           Display *dpy,
           Display *dpy,
           int *event_base_return,
           int *error_base_return);

       Status XmbufGetVersion(
           Display *dpy,
           int *major_version_return,
           int *minor_version_return);

       int XmbufCreateBuffers(
           Display *dpy,
           Window window,
           int count,
           int update_action,
           int update_hint,
           Multibuffer *buffers_update);

       void XmbufDestroyBuffers(
           Display *dpy,
           Window window);

       void XmbufDisplayBuffers(
           Display *dpy,
           int count,
           Multibuffer *buffers,
           int min_delay,
           int max_delay);

       Status XmbufGetWindowAttributes(
           Display *dpy,
           Window window,
           XmbufWindowAttributes *attributes);

       void XmbufChangeWindowAttributes(
           Display *dpy,
           Window window,
           unsigned long valuemask,
           XmbufSetWindowAttributes *attributes);

       Status XmbufGetBufferAttributes(
           Display *dpy,
           Multibuffer buffer,
           XmbufBufferAttributes *attributes);

       void XmbufChangeBufferAttributes(
           Display *dpy,
           Multibuffer buffer,
           unsigned long valuemask,
           XmbufSetBufferAttributes *attributes);

       Status XmbufGetScreenInfo(
           Display *dpy,
           Drawable drawable,
           int *nmono_return,
           XmbufBufferInfo **mono_info_return,
           int *nstereo_return,
           XmbufBufferInfo **stereo_info_return);

       Window XmbufCreateStereoWindow(
           Display *dpy,
           Window parent,
           int x,
           int y,
           unsigned int width,
           unsigned int height,
           unsigned int border_width,
           int depth,
           unsigned int class,                 /* InputOutput, InputOnly*/
           Visual *visual,
           unsigned long valuemask,
           XSetWindowAttributes *attributes,
           Multibuffer *left_return,
           Multibuffer *right_return);