Tweak error threshold for an image comparison involving subtitles.

[dcpomatic.git] / test / player_test.cc

diff --git a/test/player_test.cc b/test/player_test.cc
index e22570bc0b95b121ccb460cedc83c314c599b6d9..585d357dfed016afeea6db34fc95b12118aad1fa 100644 (file)
--- a/test/player_test.cc
+++ b/test/player_test.cc
@@ -227,7 +227,11 @@ BOOST_AUTO_TEST_CASE (player_seek_test)
                pair<shared_ptr<PlayerVideo>, DCPTime> video = butler->get_video();
                BOOST_CHECK_EQUAL(video.second.get(), t.get());
                write_image(video.first->image(note_handler, PlayerVideo::always_rgb, false, true), String::compose("build/test/player_seek_test_%1.png", i), "RGB");
-               check_image(String::compose("test/data/player_seek_test_%1.png", i), String::compose("build/test/player_seek_test_%1.png", i));
+               /* This 0.011 is empirically chosen (hopefully) to accept changes in rendering between the reference and a test machine
+                  (17.10 and 16.04 seem to anti-alias a little differently) but to reject gross errors e.g. missing fonts or missing
+                  text altogether.
+               */
+               check_image(String::compose("test/data/player_seek_test_%1.png", i), String::compose("build/test/player_seek_test_%1.png", i), 0.011);
        }
 }