Move get_advances to a new layout module.

1 files changed, 20 insertions, 0 deletions

diff --git a/scripts/layout.py b/scripts/layout.py
new file mode 100644
index 0000000..fbcaa82
--- /dev/null
+++ b/scripts/layout.py
@@ -0,0 +1,20 @@
+"""Test general health of the fonts."""
+
+import json
+
+from nototools import render
+
+_advance_cache = {}
+def get_advances(text, font):
+    """Get a list of horizontal advances for text rendered in a font."""
+    try:
+        return _advance_cache[(text, font)]
+    except KeyError:
+        pass
+
+    hb_output = render.run_harfbuzz_on_text(text, font, None)
+    hb_output = json.loads(hb_output)
+    advances = [glyph['ax'] for glyph in hb_output]
+    _advance_cache[(text, font)] = advances
+    return advances
+