+static int64_t
+dri2_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
+ int64_t msc, int64_t divisor, int64_t remainder)
+{
+#if XCB_DRI2_MINOR_VERSION >= 3
+ struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+ struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+ uint32_t msc_hi = msc >> 32;
+ uint32_t msc_lo = msc & 0xffffffff;
+ uint32_t divisor_hi = divisor >> 32;
+ uint32_t divisor_lo = divisor & 0xffffffff;
+ uint32_t remainder_hi = remainder >> 32;
+ uint32_t remainder_lo = remainder & 0xffffffff;
+ xcb_dri2_swap_buffers_cookie_t cookie;
+ xcb_dri2_swap_buffers_reply_t *reply;
+ int64_t swap_count = -1;
+
+ /* No-op for a pixmap or pbuffer surface */
+ if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
+ return 0;
+
+ if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
+ return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
+
+#ifdef __DRI2_FLUSH
+ if (dri2_dpy->flush)
+ (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
+#endif
+
+ cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
+ msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
+
+ reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
+
+ if (reply) {
+ swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
+ free(reply);
+ }
+
+#if __DRI2_FLUSH_VERSION >= 3
+ /* If the server doesn't send invalidate events */
+ if (dri2_dpy->invalidate_available && dri2_dpy->flush &&
+ dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
+ (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
+#endif
+
+ return swap_count;
+#else
+ struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+
+ return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
+#endif /* XCB_DRI2_MINOR_VERSION >= 3 */
+
+}
+