+#ifdef VBUF_MAP_BUFFER
+ (void)iws;
+#else
+ i915_render->map_used_start = i915_render->vertex_size * min_index;
+ i915_render->map_used_end = i915_render->vertex_size * (max_index + 1);
+ iws->buffer_write(iws, i915_render->vbo,
+ i915_render->map_used_start + i915_render->vbo_sw_offset,
+ i915_render->map_used_end - i915_render->map_used_start,
+ (unsigned char *)i915_render->vbo_ptr + i915_render->map_used_start);
+
+#endif
+}
+
+/**
+ * Ensure that the given max_index given is not larger ushort max.
+ * If it is larger then ushort max it advanced the hw_offset to the
+ * same position in the vbo as sw_offset and set index to zero.
+ *
+ * Side effects:
+ * On failure update hw_offset and index.
+ */
+static void
+i915_vbuf_ensure_index_bounds(struct vbuf_render *render,
+ unsigned max_index)
+{
+ struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
+
+ if (max_index + i915_render->vbo_index < ((1 << 17) - 1))
+ return;
+
+ i915_render->vbo_hw_offset = i915_render->vbo_sw_offset;
+ i915_render->vbo_index = 0;
+
+ i915_vbuf_update_vbo_state(render);