static void brw_merge_inputs( struct brw_context *brw,
		       const struct gl_client_array *arrays[])
{
   struct brw_vertex_info old = brw->vb.info;
   GLuint i;

   for (i = 0; i < VERT_ATTRIB_MAX; i++)
      brw->sws->bo_unreference(brw->vb.inputs[i].bo);

   memset(&brw->vb.inputs, 0, sizeof(brw->vb.inputs));
   memset(&brw->vb.info, 0, sizeof(brw->vb.info));

   for (i = 0; i < VERT_ATTRIB_MAX; i++) {
      brw->vb.inputs[i].glarray = arrays[i];
      brw->vb.inputs[i].attrib = (gl_vert_attrib) i;

      if (arrays[i]->StrideB != 0)
	 brw->vb.info.sizes[i/16] |= (brw->vb.inputs[i].glarray->Size - 1) <<
	    ((i%16) * 2);
   }

   /* Raise statechanges if input sizes have changed. */
   if (memcmp(brw->vb.info.sizes, old.sizes, sizeof(old.sizes)) != 0)
      brw->state.dirty.brw |= BRW_NEW_INPUT_DIMENSIONS;
}