[upem] More docs

2 years ago · 8a2efbd8a1
parent ccffce58cc
commit 8a2efbd8a1
1 changed files with 4 additions and 1 deletions
--- a/src/hb-face.cc
+++ b/src/hb-face.cc
@ -487,7 +487,10 @@ hb_face_set_upem (hb_face_t    *face,
 * hb_face_get_upem:
 * @face: A face object
 *
- * Fetches the units-per-em (upem) value of the specified face object.
+ * Fetches the units-per-em (UPEM) value of the specified face object.
+ *
+ * Typical UPEM values for fonts are 1000, or 2048, but any value
+ * in between 16 and 16,384 is allowed for OpenType fonts.
 *
 * Return value: The upem value of @face
 *