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glXSelectEventSGIX (3)
  • >> glXSelectEventSGIX (3) ( Solaris man: Библиотечные вызовы )
  • 
    NAME
         glXSelectEventSGIX - ask to receive GLX events on a drawable
    
    C SPECIFICATION
         void glXSelectEventSGIX ( Display *dpy,
              GLXDrawable drawable,
              unsigned long mask)
    
    PARAMETERS
         dpy       Specifies the connection to the X server.
    
         drawable  Specifies the drawable whose event to receive.
    
         mask      Specifies the event mask for the drawable
    
    DESCRIPTION
         glXSelectEventSGIX asks the server to receive GLX event on a
         drwable   specified   in   mask.   Only   one   GLX   event,
         GLX_BUFFER_CLOBBER_MASK_SGIX, can  be selected.
    
         The "buffer clobber" event is defined by:
    
         Given Matrix P:            P masked to preserve affine components:
    
         typdef struct {
           int event_type;       /* GLX_DAMAGED_SGIX or GLX_SAVED_SGIX */
           int draw_type;        /* GLX_WINDOW_SGIX or GLX_PBUFFER_SGIX */
           unsigned long serial; /* no. of last request processed by server */
           Bool send_event;      /* event was generated by a SendEvent request */
           Display *display;     /* display the event was read from */
           GLXDrawable drawable; /* i.d. of Drawable */
           unsigned int mask;    /* mask indicating which buffers are affected*/
           int x, y;
           int width, height;
           int count;            /* if nonzero, at least this many more */
         } GLXBufferClobberEventSGIX;
    
         event_type  Indicates the event type for a "buffer  clobber"
                     event.  For "preserved" pbuffers, an event, with
                     GLX_SAVED_SGIX, is generated whenever  the  con-
                     tents  of  a  pbuffer  has  to be moved to avoid
                     being damaged.  For  "unpreserved"  pbuffers  an
                     event, with GLX_DAMAGED_SGIX, is generated when-
                     ever a portion of the pbuffer  becomes  invalid.
                     For   Windows,  "buffer  clobber"  events,  with
                     GLX_DAMAGED_SGIX or GLX_SAVED_SGIX, occur  when-
                     ever  an  ancillary  buffer, associated with the
                     window, gets clobbered or moved out of offscreen
                     memory.
    
         draw_type   Indicates the drwable  tye:  GLX_WINDOW_SGIX  or
                     GLX_PBUFFER_SGIXi.
    
          mask       Indicates which color or ancillary buffers  were
                     affected. The following event is returned:
    
                            GLX_FRONT_LEFT_BUFFER_BIT_SGIX
                            GLX_FRONT_RIGHT_BUFFER_BIT_SGIX
                            GLX_BACK_LEFT_BUFFER_BIT_SGIX
                            GLX_BACK_RIGHT_BUFFER_BIT_SGIX
                            GLX_AUX_BUFFERS_BIT_SGIX
                            GLX_DEPTH_BUFFER_BIT_SGIX
                            GLX_STENCIL_BUFFER_BIT_SGIX
                            GLX_ACCUM_BUFFER_BIT_SGIX
                            GLX_SAMPLE_BUFFERS_BIT_SGIX
    
    NOTES
         1.   In Sun's implementation, Pbuffer is  allocated  in  the
              main memory and always preserved. The ancillary buffers
              of a window and pbuffer are also preserved,  and  never
              move  out of the off-screen memory. Thus, Sun's Xserver
              does not generate "buffer clobber" event.
    
         2.   glXSelectEventSGIX  is  part  of  the   GLX   extension
              SGIX_pbuffer,  not part of the core GLX command set. If
              SGIX_pbuffer is included  in  the  string  returned  by
              glXQueryExtensionsString,   extension  SGIX_pbuffer  is
              supported by the connection.
    
    ERRORS
         GLXBadDrawable is generated  if  drawable  is  not  a  valid
         GLXPbuffer or a valid window.
    
    SEE ALSO
         glXCreateGLXPbufferSGIX,            glXGetSelectedEventSGIX,
         glXQueryExtensionsString.
    
    
    
    


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