-/**
- * Retrieves the verion of the internal libGL API in YYYYMMDD format. This
- * might be used by the DRI drivers to determine how new libGL is at runtime.
- * Drivers should not call this function directly. They should instead use
- * \c glXGetProcAddress to obtain a pointer to the function.
- *
- * \returns An 8-digit decimal number representing the internal libGL API in
- * YYYYMMDD format.
- *
- * \sa glXGetProcAddress, PFNGLXGETINTERNALVERSIONPROC
- *
- * \since Internal API version 20021121.
- */
-int __glXGetInternalVersion(void)
-{
- /* History:
- * 20021121 - Initial version
- * 20021128 - Added __glXWindowExists() function
- * 20021207 - Added support for dynamic GLX extensions,
- * GLX_SGI_swap_control, GLX_SGI_video_sync,
- * GLX_OML_sync_control, and GLX_MESA_swap_control.
- * Never officially released. Do NOT test against
- * this version. Use 20030317 instead.
- * 20030317 - Added support GLX_SGIX_fbconfig,
- * GLX_MESA_swap_frame_usage, GLX_OML_swap_method,
- * GLX_{ARB,SGIS}_multisample, and
- * GLX_SGIX_visual_select_group.
- * 20030606 - Added support for GLX_SGI_make_current_read.
- * 20030813 - Made support for dynamic extensions multi-head aware.
- * 20030818 - Added support for GLX_MESA_allocate_memory in place of the
- * deprecated GLX_NV_vertex_array_range & GLX_MESA_agp_offset
- * interfaces.
- * 20031201 - Added support for the first round of DRI interface changes.
- * Do NOT test against this version! It has binary
- * compatibility bugs, use 20040317 instead.
- * 20040317 - Added the 'mode' field to __DRIcontextRec.
- * 20040415 - Added support for bindContext3 and unbindContext3.
- * 20040602 - Add __glXGetDrawableInfo. I though that was there
- * months ago. :(
- */
- return 20040602;
-}
-
-
-
-static Bool windowExistsFlag;
-
-static int windowExistsErrorHandler(Display *dpy, XErrorEvent *xerr)
-{
- if (xerr->error_code == BadWindow) {
- windowExistsFlag = GL_FALSE;
- }
- return 0;
-}
-
-/**
- * Determine if a window associated with a \c GLXDrawable exists on the
- * X-server. This function is not used internally by libGL. It is provided
- * as a utility function for DRI drivers.
- * Drivers should not call this function directly. They should instead use
- * \c glXGetProcAddress to obtain a pointer to the function.
- *
- * \param dpy Display associated with the drawable to be queried.
- * \param draw \c GLXDrawable to test.
- *
- * \returns \c GL_TRUE if a window exists that is associated with \c draw,
- * otherwise \c GL_FALSE is returned.
- *
- * \warning This function is not currently thread-safe.
- *
- * \sa glXGetProcAddress
- *
- * \since Internal API version 20021128.
- */
-static Bool __glXWindowExists(Display *dpy, GLXDrawable draw)
-{
- XWindowAttributes xwa;
- int (*oldXErrorHandler)(Display *, XErrorEvent *);
-
- XSync(dpy, GL_FALSE);
- windowExistsFlag = GL_TRUE;
- oldXErrorHandler = XSetErrorHandler(windowExistsErrorHandler);
- XGetWindowAttributes(dpy, draw, &xwa); /* dummy request */
- XSetErrorHandler(oldXErrorHandler);
- return windowExistsFlag;
-}
-
-