[util/hb-shape] Accept an empty output-format that would skip output
Useful for benchmarking, to avoid buffer serialization overhead (which
seems to by far dominate shaping!)
diff --git a/util/hb-shape.cc b/util/hb-shape.cc
index b7d2ca6..324934a 100644
--- a/util/hb-shape.cc
+++ b/util/hb-shape.cc
@@ -48,7 +48,10 @@
output_format = HB_BUFFER_SERIALIZE_FORMAT_TEXT;
else
output_format = hb_buffer_serialize_format_from_string (options.output_format, -1);
- if (!hb_buffer_serialize_format_to_string (output_format))
+ /* An empty "output_format" parameter basically skips output generating.
+ * Useful for benchmarking. */
+ if (*options.output_format &&
+ !hb_buffer_serialize_format_to_string (output_format))
{
if (options.explicit_output_format)
fail (false, "Unknown output format `%s'; supported formats are: %s",
