-{
- struct svga_screen *ss = svga_screen(pipe->screen);
- struct svga_buffer *sbuf = svga_buffer(buf);
-
- /**
- * XXX: Check this.
- * The screen may cache buffer writes, but when we map, we map out
- * of those cached writes, so we don't need to set a
- * PIPE_REFERENCED_FOR_WRITE flag for cached buffers.
- */
-
- if (!sbuf->handle || ss->sws->surface_is_flushed(ss->sws, sbuf->handle))
- return PIPE_UNREFERENCED;
-
- /**
- * sws->surface_is_flushed() does not distinguish between read references
- * and write references. So assume a reference is both,
- * however, we make an exception for index- and vertex buffers, to avoid
- * a flush in st_bufferobj_get_subdata, during display list replay.
- */
-
- if (sbuf->base.usage & (PIPE_BUFFER_USAGE_VERTEX | PIPE_BUFFER_USAGE_INDEX))
- return PIPE_REFERENCED_FOR_READ;
-
- return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
-}
-
-
-struct pipe_context *svga_context_create( struct pipe_screen *screen )