+/* Figure out whether u_blitter will fallback to a transfer operation.
+ * If so, don't use a staging resource.
+ */
+static boolean permit_hardware_blit(struct pipe_screen *screen,
+ struct pipe_resource *res)
+{
+ unsigned bind;
+
+ if (util_format_is_depth_or_stencil(res->format))
+ bind = PIPE_BIND_DEPTH_STENCIL;
+ else
+ bind = PIPE_BIND_RENDER_TARGET;
+
+ /* See r600_resource_copy_region: there is something wrong
+ * with depth resource copies at the moment so avoid them for
+ * now.
+ */
+ if (util_format_get_component_bits(res->format,
+ UTIL_FORMAT_COLORSPACE_ZS,
+ 0) != 0)
+ return FALSE;
+
+ if (!screen->is_format_supported(screen,
+ res->format,
+ res->target,
+ res->nr_samples,
+ bind, 0))
+ return FALSE;
+
+ if (!screen->is_format_supported(screen,
+ res->format,
+ res->target,
+ res->nr_samples,
+ PIPE_BIND_SAMPLER_VIEW, 0))
+ return FALSE;
+
+ return TRUE;
+}
+